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Sample records for canaries serinus canaria

  1. Ossifying fibroma in a canary (Serinus canaria).

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    Razmyar, Jamshid; Dezfoulian, Omid; Peighambari, Seyed Mostafa

    2008-12-01

    A 1-year-old male canary (Serinus canaria, Jibber breed), with a protuberance on the left tibia was referred to the clinic. The bird was not able to use the affected foot to stand on its perch. Results of radiographs revealed a radio-opaque hard tissue mass. The canary was euthanatized and submitted for necropsy. On histopathologic examination, the mass was diagnosed as an ossifying fibroma tumor. To our knowledge, ossifying fibroma has not been reported in birds so far, and this is the first known report of this tumor in birds.

  2. Cloacal fibrosarcoma in a canary (Serinus canaria).

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    Palmieri, Chiara; Cusinato, Isacco; Avallone, Giancarlo; Shivaprasad, L; Della Salda, Leonardo

    2011-12-01

    A 1-year-old, male canary (Serinus canaria) with a history of an enlarged abdomen of several days duration died acutely and was submitted for necropsy. Results revealed a yellow to tan hard mass, 2 cm in diameter, adherent to the cloacal wall. Histologically, the mass was composed of interlacing bundles of pleomorphic spindle cells with numerous and bizarre mitotic figures. Neoplastic cells were positive for vimentin and negative for desmin and actin and showed ultrastructural features (dilated stacks of rough endoplasmic reticulum, intermediate filaments, rare collagen secretion granules, lack of external lamina) typical of fibroblasts. Based on these results, the diagnosis was cloacal fibrosarcoma, previously not reported in canaries.

  3. Granulomatous myocarditis caused by Candida albicans in a canary (Serinus canaria).

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    Marruchella, Giuseppe; Todisco, Gianluca; D'Arezzo, Silvia; Di Guardo, Giovanni; Paglia, Maria Grazia

    2011-09-01

    Candida albicans is among the major agents of mucous membrane mycosis in humans and animals, with systemic and deep infections observed in immunocompromised hosts. We describe a case of fatal granulomatous myocarditis caused by C albicans in a 20-day-old canary (Serinus canaria). The etiologic diagnosis was confirmed by identifying characteristic morphologic features of the organism, combined with histochemical staining, and followed by the use of ad hoc biomolecular analysis.

  4. Isospora serinuse n. sp. (Apicomplexa: Eimeriidae) from a domestic canary (Serinus canaria forma domestica) (Passeriformes: Fringillidae) in Western Australia.

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    Yang, Rongchang; Brice, Belinda; Elliot, Aileen; Ryan, Una

    2015-12-01

    A new species, Isospora serinuse n. sp., (Apicomplexa:Eimeriidae) is described from a single domestic canary (Serinus canaria forma domestica) (subspecies S. c. domestica) in Western Australia. Sporulated oocysts of Isospora serinuse n. sp. are spherical or subspherical, 25.5 (24.4-27.0) × 23.5 (22.0-24.8) μm, with a shape index (length/width) of 1.09; and a smooth bilayered oocyst wall, 1.2 μm thick (outer layer 0.9 μm, inner 0.3 μm). A polar granule is present, but a micropyle and oocyst residuum are absent. The sporocysts are lemon-shaped, 18.9 (17.8-20.2) × 11.8 (10.6-13.0) μm, with a shape index of 1.6. Stieda and substieda bodies are present, the Stieda body being a small crescent shape and the substieda being indistinct. Each sporocyst with four vermiform sporozoites arranged head to tail. A sporocyst residuum is present and composed of numerous granules of different sizes that are scattered among the sporozoites. Morphologically, the oocysts of Isospora serinuse n. sp. were different from those of all known valid Isospora spp. Molecular analysis was conducted at 3 loci: the 18S and 28S ribosomal RNA and two separate regions of subunit I of the mitochondrial cytochrome oxidase (COI) gene (designated COIa and COIb). At the 18S locus, Isospora serinuse n. sp. exhibited 97.5% similarity to Isospora sp. Tokyo from a domestic pigeon (Columba livia domestica) in Japan. At the 28S locus, I. serinuse n. sp. exhibited 94.9% similarity to Isospora anthochaerae n. sp. from a red wattlebird (Anthochaera carunculata) in Australia. At the COIa locus, I. serinuse n. sp. exhibited 95.7% similarity to Isospora sospora sp. ex Apodemus flavicollis from a yellow-necked mouse and Isospora gryphoni from an American goldfinch (Carduelis tristis) respectively. At the COIb locus, I. serinuse n. sp. exhibited 96.7% similarity to an Isospora (iSAT4) from a European pied flycatcher (Ficedula hypoleuca). Based on morphological and molecular data, this isolate is a new

  5. Novel avian bornavirus in a nonpsittacine species (Canary; Serinus canaria) with enteric ganglioneuritis and encephalitis.

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    Weissenböck, Herbert; Sekulin, Karin; Bakonyi, Tamás; Högler, Sandra; Nowotny, Norbert

    2009-11-01

    A canary bird (Serinus canaria) died with nonsuppurative ganglioneuritis of the proventriculus and gizzard and encephalitis, lesions comparable to proventricular dilatation disease (PDD) of psittacine birds. Recently, several genotypes of a novel avian bornavirus have been linked to PDD. In the canary, bornaviral antigen was detected by immunohistochemistry in both neural and extraneural tissues. The widespread viral dissemination was confirmed by reverse transcription-PCR. Sequence analysis revealed a unique genotype of avian bornavirus. This observation suggests that bornaviruses are natural pathogens of several avian species and that the family Bornaviridae comprises more viral genotypes (or viral species) than previously assumed.

  6. Identification of shiga toxin and intimin genes in Escherichia coli detected from canary (Serinus canaria domestica).

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    Gholami-Ahangaran, Majid; Zia-Jahromi, Noosha

    2014-09-01

    The pathogenicity of enterohemorrhagic Escherichia coli (EHEC) strains is, in large part, due to shiga toxin (Stx) genes (Stx1 and Stx2) and/or intimin (eae) gene. The purpose of this study was to analyze the role of domestic canaries (Serinus canaria domestica) as a reservoir of Stx and intimin producing strains of E. coli. For this study, a total of 50 cloacal swabs were collected from 50 healthy domestic canaries. Cloacal swabs were cultured and tested using standard methods of microbiology. After primary identification of E. coli, DNA was extracted and polymerase chain reaction was performed using specific primers for Stx1, Stx2 and eae genes. In this study, three of 50 samples were found to be Stx2 positive. In the present study, nine (18%) of 50 canaries tested were positive for eae gene. Only 2% of total canaries tested were positive for simultaneous Stx and eae genes. By considering the presence of Stx genes in E. coli isolated from cloacal contents of canary, this hypothesis expressed that the canaries may be the carriers of virulence genes that can risk human health. Canary was considered to be a reservoir of Stx and intimin genes and make these birds important vehicles for the spread of zoonosis infection. © The Author(s) 2012.

  7. Amplitude modulation of sexy phrases is salient for song attractiveness in female canaries (Serinus canaria).

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    Pasteau, Magali; Ung, Davy; Kreutzer, Michel; Aubin, Thierry

    2012-07-01

    Song discrimination and recognition in songbird species have usually been studied by measuring responses to song playbacks. In female canaries, Serinus canaria, copulation solicitation displays (CSDs) are used as an index of female preferences, which are related to song recognition. Despite the fact that many studies underline the role of song syntax in this species, we observed that short segments of songs (a few seconds long) are enough for females to discriminate between conspecific and heterospecific songs, whereas such a short duration is not sufficient to identify the syntax rules. This suggests that other cues are salient for song recognition. In this experiment, we investigated the influence of amplitude modulation (AM) on the responses (CSDs) of female canaries to song playbacks. We used two groups of females: (1) raised in acoustic isolation and (2) raised in normal conditions. When adult, we tested their preferences for sexy phrases with different AMs. We broadcast three types of stimuli: (1) songs with natural canary AM, (2) songs with AM removed, or (3) song with wren Troglodytes troglodytes AM. Results indicate that female canaries prefer and have predispositions for a song type with the natural canary AM. Thus, this acoustic parameter is a salient cue for song attractiveness.

  8. Identification and antimicrobial resistance of members from the Enterobacteriaceae family isolated from canaries (Serinus canaria

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    Ruben V. Horn

    2015-06-01

    Full Text Available Abstract: The Enterobacteriaceae family contains potentially zoonotic bacteria, and their presence in canaries is often reported, though the current status of these in bird flocks is unknown. Therefore, this study aimed to identify the most common genera of enterobacteria from canaries (Serinus canaria and their antimicrobial resistance profiles. From February to June of 2013, a total of 387 cloacal swab samples from eight domiciliary breeding locations of Fortaleza city, Brazil, were collected and 58 necropsies were performed in canaries, which belonged to the Laboratory of Ornithological Studies. The samples were submitted to microbiological procedure using buffered peptone water and MacConkey agar. Colonies were selected according to their morphological characteristics on selective agar and submitted for biochemical identification and antimicrobial susceptibility. A total of 61 isolates were obtained, of which 42 were from cloacal swabs and 19 from necropsies. The most isolated bacteria was Escherichia coli with twenty five strains, followed by fourteen Klebsiellaspp., twelve Enterobacterspp., seven Pantoea agglomerans, two Serratiaspp. and one Proteus mirabilis. The antimicrobial to which the strains presented most resistance was sulfonamides with 55.7%, followed by ampicillin with 54.1% and tetracycline with 39.3%. The total of multidrug-resistant bacteria (MDR was 34 (55.7%. In conclusion, canaries harbor members of the Enterobacteriaceae family and common strains present a high antimicrobial resistance rate, with a high frequency of MDR bacteria.

  9. Female signalling to male song in the domestic canary, Serinus canaria

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    Amy, Mathieu; Salvin, Pauline; Naguib, Marc; Leboucher, Gerard

    2015-01-01

    Most studies on sexual selection focus on male characteristics such as male song in songbirds. Yet female vocalizations in songbirds are growing in interest among behavioural and evolutionary biologists because these vocalizations can reveal the female's preferences for male traits and may affect male display. This study was designed to test whether male song performance influences the different female signals in the domestic canary (Serinus canaria). Female canaries were exposed to three types of song performance, differing in the repetition rate of sexy syllables. This experiment demonstrates that female birds are engaged in multimodal communication during sexual interaction. The results support the copulation solicitation hypothesis for female-specific trills: these trills were positively correlated and had a similar pattern to the copulation solicitation displays; responses were higher to the songs with higher performance and responses decreased with the repetition of the stimulation. Also, we observed a sensitization effect with the repetition of the song of the highest performance for the simple calls. Simple trills and other calls were more frequent during the broadcast of canary songs compared with the heterospecific control songs. The differential use of female signals in response to different song performance reveals a highly differentiated female signalling system which is discussed in light of the role of female traits to understand sexual selection in a broader perspective. PMID:26064577

  10. Unusual pathology of canary poxvirus infection associated with high mortality in young and adult breeder canaries (Serinus canaria).

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    Shivaprasad, H L; Kim, T; Tripathy, D; Woolcock, P R; Uzal, F

    2009-08-01

    Mortality in excess of 65% occurred in a flock of 450 canaries (Serinus canaria). Clinical signs in the canaries included severe respiratory distress, loss of feathers and/or scaly skin on the head, neck and back, anorexia, loss of weight and fluffed-up appearance of several days duration before death. Gross pathology in most of the canaries included thickened eye lids and small scab-like nodules on the skin of the head and neck, enlarged thymus, mild to severe consolidation of lungs and exudate in the sinuses and trachea. A few birds also had thickened air sacs and enlarged and pale spleens. Microscopically unusual lesions included severe epithelial proliferation and hypertrophy and mononuclear inflammatory cells containing eosinophilic intracytoplasmic inclusion bodies of poxvirus in the thymus, bursa of Fabricius, spleen, bone marrow, air sac, peritoneum, external and middle ears, and lachrymal gland. Similar inclusion bodies associated with inflammation were also seen in the epidermis, dermis, feather follicles, conjunctivae, sinuses, turbinates, choana, oral mucosa including tongue, oesophagus, larynx, trachea, syrinx and bronchi and parabronchi of lungs. Some of the birds also had concurrent bacterial, mycotic and polyomavirus infections. Poxvirus was isolated from lungs and skin in chicken embryo liver cells and confirmed as avian poxvirus by polymerase chain reaction.

  11. Modulation by steroid hormones of a ''sexy'' acoustic signal in an Oscine species, the Common Canary Serinus canaria

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    Rybak Fanny

    2004-01-01

    Full Text Available The respective influence of testosterone and estradiol on the structure of the Common Canary Serinus canaria song was studied by experimentally controlling blood levels of steroid hormones in males and analyzing the consequent effects on acoustic parameters. A detailed acoustic analysis of the songs produced before and after hormonal manipulation revealed that testosterone and estradiol seem to control distinct song parameters independently. The presence of receptors for testosterone and estradiol in the brain neural pathway controlling song production strongly suggests that the observed effects are mediated by a steroid action at the neuronal level.

  12. Modulation by steroid hormones of a "sexy" acoustic signal in an Oscine species, the Common Canary Serinus canaria.

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    Rybak, Fanny; Gahr, Manfred

    2004-06-01

    The respective influence of testosterone and estradiol on the structure of the Common Canary Serinus canaria song was studied by experimentally controlling blood levels of steroid hormones in males and analyzing the consequent effects on acoustic parameters. A detailed acoustic analysis of the songs produced before and after hormonal manipulation revealed that testosterone and estradiol seem to control distinct song parameters independently. The presence of receptors for testosterone and estradiol in the brain neural pathway controlling song production strongly suggests that the observed effects are mediated by a steroid action at the neuronal level.

  13. Seasonality in song behaviour revisited: seasonal and annual variants and invariants in the song of the domesticated canary (Serinus canaria).

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    Voigt, Cornelia; Leitner, Stefan

    2008-08-01

    The song of the domesticated canary (Serinus canaria) is one of the most widely used models to study the neural correlates of behavioural plasticity and the mechanisms of female mate choice. However, only few studies have described the song behaviour in detail and monitored their changes throughout the year, and these data are restricted to the "Waterslager" strain. Here, we studied the song characteristics of the male common domesticated canary at different times of the year, the spring breeding and autumnal non-breeding season, and monitored the birds' songs up to the following breeding season. During breeding, males have increased plasma levels of testosterone, and songs are on average longer and consist of fewer non-repeated syllable types compared to the non-breeding season. When subsequent seasons are compared, song duration and the proportion of non-repeated syllable types change seasonally but not across years. Repertoire size remains constant throughout seasons although syllable types are exchanged. Syllable carry-over is significantly higher from one breeding season to the next than between the breeding and non-breeding season. Further, the repertoire of the breeding season contains more potentially sexually attractive syllable types than that of the non-breeding season. These data show that overall song structure is retained throughout the year while seasonality occurs in the temporal pattern and in repertoire composition.

  14. An outbreak of yolk sac infection and dead-in-shell mortality in common canary (Serinus canaria) caused by Klebsiella pneumoniae.

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    Razmyar, J; Zamani, A H

    2016-01-01

    Yolk sac infection (YSI) and dead-in-shell mortality caused by Enterobacteriaceae in birds are not a rare phenomenon, however there are only a few reports indicating the association between these conditions and Klebsiella spp. among canary chicks (Serinus canaria). There have been reports of high mortality among 1-3 day old canary chicks in an indoor flock of canaries. In order to study the causative agent, yolk sac samples from dead-in-shell and day-old canary chicks were cultured. Klebsiella pneumonia was isolated and identified based on biochemical tests and using genus and species-specific multiplex PCR and later tested for their susceptibility to 13 antimicrobial agents. The isolates showed susceptibility to Gentamycin, Chloramphenicol, Florfenicol and Streptomycin.

  15. Outbreak of an Unusual Tracheal Mite, Ptilonyssus morofskyi (Acarina: Rhinonyssidae), in Canaries ( Serinus canaria ) With Concurrent Infection With Staphylococcus aureus and Macrorhabdus ornithogaster.

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    Arabkhazaeli, Fatemeh; Madani, Seyed Ahmad; Ghavami, Samare

    2016-09-01

    Mortalities in a flock of canaries ( Serinus canaria ) with respiratory acariasis, pododermatitis caused by Staphylococcus aureus , and macrorhabdosis were investigated by postmortem examination. After a thorough parasitologic study, the tracheal mites were identified as Ptilonyssus morofskyi. Cleaning and disinfection of cages and perches, ivermectin application on the cervical skin of individual birds, enrofloxacin medication, and drinking water acidification with vinegar were used to control mortality. To the best of our knowledge, this is the first report of the occurrence of Ptilonyssus species in captive passerine birds.

  16. Avian bornaviruses are widely distributed in canary birds (Serinus canaria f. domestica).

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    Rubbenstroth, Dennis; Rinder, Monika; Stein, Malte; Höper, Dirk; Kaspers, Bernd; Brosinski, Katrin; Horie, Masayuki; Schmidt, Volker; Legler, Marko; Korbel, Rüdiger; Staeheli, Peter

    2013-08-30

    Avian bornavirus (ABV) was identified in 2008 as the causative agent of proventricular dilatation disease (PDD) in psittacine birds. In addition, ABV variants were detected in wild waterfowl and in a canary bird. PDD-like diseases were also reported in various other avian species, but it remains unknown whether ABV is involved. In this study we detected ABV in 12 of 30 tested canary bird flocks (40%), indicating a wide distribution of ABV in captive canary birds in Germany. Sequence analysis identified several distinct ABV genotypes which differ markedly from the genotypes present in psittacine birds. Some canaries naturally infected with ABV exhibited gastrointestinal and neurological symptoms which resembled PDD in psittacines, while others did not show signs of disease. Canaries experimentally inoculated with ABV developed infections of the brain and various other organs. The experimentally infected canaries transmitted the virus to sentinel birds kept in the same aviary, but did not show any clinical signs during a five month observation period. Embryonated eggs originating from ABV-infected hens contained ABV-specific RNA, but virus could not be re-isolated from embryonic tissue. These results indicate that ABV is widely distributed in canary birds and due to its association to clinical signs should be considered as a potential pathogen of this species. Copyright © 2013. Published by Elsevier B.V.

  17. You know what? I'm happy. Cognitive bias is not related to personality but is induced by pair-housing in canaries (Serinus canaria).

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    Lalot, Mathilde; Ung, Davy; Péron, Franck; d'Ettorre, Patrizia; Bovet, Dalila

    2017-01-01

    Recent studies suggest that cognitive bias could constitute a novel and valid measure of animal welfare. Although interest for a link between personality and cognition is growing, no study to date investigated whether a cognitive bias might be related to the personality of the individuals. We trained 43 domestic canaries (Serinus canaria) to discriminate between two sides of a test cage, each side being associated with a different value (attractive or aversive food in a dish). During the test phase, the dish was placed at intermediate locations, representing ambiguous information. Results show evidence of an "optimistic" bias (flying faster to the dish at the ambiguous location) in birds housed in pairs, compared to birds housed singly, suggesting an influence of social context (living conditions) on canaries' emotions when tested individually. We also studied six traits of individuals' personality and found that aggressiveness, neophobia, one sociability index and obstinacy were repeatable across social context and/or day-light schedule, whereas the other sociability index, boldness and locomotion were not. No correlation between the birds' optimism and any of their personality traits was found, suggesting that cognitive bias may be a matter of social context rather than of individual personality. Copyright © 2016 Elsevier B.V. All rights reserved.

  18. Trichomonosis outbreak in a flock of canaries (Serinus canaria f. domestica) caused by a finch epidemic strain of Trichomonas gallinae.

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    Zadravec, Marko; Slavec, Brigita; Krapež, Uroš; Gombač, Mitja; Švara, Tanja; Poljšak-Prijatelj, Mateja; Gruntar, Igor; Račnik, Joško

    2017-05-30

    In the present paper, an outbreak of trichomonosis in a flock of 15 breeding pairs of canaries is described. Trichomonosis was diagnosed on characteristic clinical signs, microscopic examination of crop/esophageal swabs, gross pathology and histopathology. Trichomonads were successfully grown in culture media and were characterized by multi-locus sequence typing. The three genomic loci ITS1-5.8S-ITS2, 18S rRNA and Fe-hydrogenase were analyzed. Molecular characterization confirmed the finch trichomonosis strain, identical to the strain that caused emerging disease in free-living passerine birds in Europe. Flock treatment with metronidazole (200mg/L) in drinking water for 5days was partially effective. After individual treatment with oral application of metronidazole (20mg/kg SID) for 5days no further clinical signs were observed in the flock over next 30 months. Copyright © 2017 Elsevier B.V. All rights reserved.

  19. Does testosterone mediate the trade-off between nestling begging and growth in the canary (Serinus canaria)?

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    Buchanan, K L; Goldsmith, A R; Hinde, C A; Griffith, S C; Kilner, R M

    2007-12-01

    Nestling birds solicit food from their parents with vigorous begging displays, involving posturing, jostling and calling. In some species, such as canaries, begging is especially costly because it causes a trade off against nestling growth. Fitness costs of begging like this are predicted by evolutionary theory because they function to resolve conflicts of interest within the family over the provision of parental investment. However, the mechanism that links these costs with nestling behaviour remains unclear. In the present study, we determine if the relationships between nestling androgen levels, nestling begging intensities and nestling growth rates are consistent with the hypothesis that testosterone is responsible for the trade-off between begging and growth. We test this idea with a correlational study, using fecal androgens as a non-invasive method for assaying nestling androgen levels. Our results show that fecal androgen levels are positively correlated with nestling begging intensity, and reveal marked family differences in each trait. Furthermore, changes in fecal androgen levels between 5 and 8 days after hatching are positively associated with changes in nestling begging intensity, and negatively associated with nestling growth during this time. Although these correlational results support our predictions, we suggest that that experimental manipulations are now required to test the direct or indirect role of testosterone in mediating the trade-off between begging and growth.

  20. Cutaneous myxoma in a pintagol (Sporagra magellanica X Serinus canaria

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    Guilherme Reis Blume

    2015-09-01

    Full Text Available Myxomas are benign mesenchymal tumors rarely described in birds. This report describes the clinical and pathological findings in a case of myxoma in a pintagol (Sporagra magellanicaX Serinus canaria. The animal had a nodule on the dorsal region of the third digit on the left hindlimb. Grossly, it was a 0.9×0.5×0.4cm, soft, white nodule, with black and yellow areas on the cut surface. Microscopically, a well-differentiated monomorphic population of spindle cells arranged in an abundant Alcian blue-positive myxoid matrix was observed. The diagnosis of myxoma was based on the microscopic findings

  1. Hatching asynchrony aggravates inbreeding depression in a songbird (Serinus canaria): an inbreeding-environment interaction.

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    de Boer, Raïssa A; Eens, Marcel; Fransen, Erik; Müller, Wendt

    2015-04-01

    Understanding how the intensity of inbreeding depression is influenced by stressful environmental conditions is an important area of enquiry in various fields of biology. In birds, environmental stress during early development is often related to hatching asynchrony; differences in age, and thus size, impose a gradient in conditions ranging from benign (first hatched chick) to harsh (last hatched chick). Here, we compared the effect of hatching order on growth rate in inbred (parents are full siblings) and outbred (parents are unrelated) canary chicks (Serinus canaria). We found that inbreeding depression was more severe under more stressful conditions, being most evident in later hatched chicks. Thus, consideration of inbreeding-environment interactions is of vital importance for our understanding of the biological significance of inbreeding depression and hatching asynchrony. The latter is particularly relevant given that hatching asynchrony is a widespread phenomenon, occurring in many bird species. The exact causes of the observed inbreeding-environment interaction are as yet unknown, but may be related to a decrease in maternal investment in egg contents with laying position (i.e. prehatching environment), or to performance of the chicks during sibling competition and/or their resilience to food shortage (i.e. posthatching environment). © 2015 The Author(s).

  2. Increasing incidence of megabacteriosis in canaries (Serinus canarius domesticus).

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    Marlier, D; Leroy, C; Sturbois, M; Delleur, V; Poulipoulis, A; Vindevogel, H

    2006-11-01

    A total of 312 post-mortem examinations of 178 canaries (Serinus canarius domesticus), 40 parakeets (Melopsittacus undulatus, Nymphicus hollandicus) and 94 parrots (Amazona aestiva, Psitaccus erithacus) were conducted at the Birds and Rabbits Service of the University of Liège, Belgium. After a detailed gross examination, tissue samples were collected for virological and/or bacteriological and/or parasitological examination to complete the diagnosis. In all cases, a microscopic examination of the proventricular mucus layer was undertaken for the detection of the anamorphic ascomycetous yeast Macrorhabdus ornithogaster, which causes the non-zoonotic but important disease in cage birds known as megabacteriosis. At the time of death, megabacteriosis was diagnosed respectively in 28% of canaries and 22.5% of budgerigars (P value for Fisher's exact test=0.5576), but was not diagnosed in parrots (P value for Fisher's exact test <0.0001). The incidence of megabacteriosis significantly increases along the years (P value for chi2 test <0.0001, Cramer's coefficient=0.3405). The most common gross lesions seen at necropsy of the 59 megabacteriosis cases was proventricular dilatation (86.1%). All the birds diagnosed as typical megabacteriosis cases were free of Salmonella spp. infections and of any parasitic infections. Four megabacteriosis cases (three canaries, one parakeet) were not included in statistical analysis as salmonellosis, pseudotuberculosis, coccidiosis and chlamydophilosis were diagnosed concomitantly in these birds. With the exception of megabacteriosis, the most frequent causes of death were protozoan (coccidiosis, lankesterellosis) infections (18.4%) and salmonellosis (17.1%) in canaries, and psittacosis (31.5%) and viral hepatitis (26.3%) in parakeets. In parrots, the most common causes of death were psittacosis (28.6%) and aspergillosis (28.5%).

  3. Systematics of Serinus canaries and the status of Cape and Yellow ...

    African Journals Online (AJOL)

    Systematics of Serinus canaries and the status of Cape and Yellow-crowned Canaries inferred from mtDNA and morphology. P G Ryan, D Wright, G Oatley, J Wakeling, C Cohen, T L Nowell, R CK Bowie, V Ward, T M Crowe ...

  4. Innovative individuals are not always the best demonstrators: feeding innovation and social transmission in Serinus canaria.

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    Cadieu, Nicole; Fruchard, Stéphane; Cadieu, Jean-Claude

    2010-01-22

    Feeding innovation occurs when individuals choose a novel, unknown type of food and/or acquire new feeding skills. Here we studied feeding innovation and social transmission of the new feeding habit in canaries. Adult canaries eat a wide variety of seeds but avoid larger ones such as those of sunflowers. We determined whether adults of both sexes are equally prone to innovate when confronted with sunflower seeds and whether free-interactions facilitate transmission of the new feeding habit in a sex-dependent manner. First we determined which sex was more innovative, i.e., was more successful at husking and eating the novel seeds. Males were clearly more innovative than females. Due to this, experienced males served as model for either male or female observers in three different conditions (free interaction with a demonstrator, visual interaction with a demonstrator placed behind a transparent wall and access to seeds in the presence of a non-demonstrating bird). During free interactions, the new feeding habit was only transmitted to females. In contrast, transmission of seed handling to male observers only occurred if demonstrator and observer were separated by the transparent wall. Indeed, aggressive behaviors between males prevented social transmission during free interactions. Finally, we studied the influence of the less innovative females in feeding-habit transmission. First, we obtained female demonstrators by making them freely interact with male demonstrators. Once they acquired innovative responses to sunflower seeds we studied feeding-habit transmission towards male and female observers. Observers of both sexes learned during free interactions with female demonstrators. No aggressive behavior occurred. Males were also able to learn after visual interactions with the female demonstrator. Our results show that the most innovative individuals (males) are not always the best demonstrators, and that social relationship and sex are crucial factors for the

  5. GIS application to holocene volcanism of Gran Canaria (Canary Islands). Example of El Draguillo Volcano

    OpenAIRE

    Rodríguez González, A.; Pérez Torrado, Francisco J.; Hansen, A.; Fernández Turiel, J. L.; Aulinas, Maritxell

    2006-01-01

    The Geographical Information Systems (GIS) represent a power ful tool in many scientific fields, included the volcanology. The present work shows its application to the Holocene volcanism of Gran Canaria (Canary Islands) with an example of El Draguillo volcano. The inclusion of all the geological data (detailed cartography, geochronology, petrology, geochemistry, etc) of this volcano in a GIS provides a better visualization of its spatial-temporal evolution by means of the use of ...

  6. Early Pliocene fishes (Chondrichthyes, Osteichthyes) from Gran Canaria and Fuerteventura (Canary Islands, Spain)

    OpenAIRE

    J. F. Betancort; A. Lomoschitz; Meco, J.

    2016-01-01

    Fossil fish teeth are contained in marine deposits dated at ca 4.8 Ma found on the islands of Gran Canaria and Fuerteventura (Canary Islands, Spain). These islands, situated in the North Atlantic Subtropical Gyre, can be considered a mid-way stopover point between the Caribbean Sea, with the Central American Seaway about to close in this epoch, and the Mediterranean, in the first stage of its post-Messinian Gibraltar Seaway period. Accordingly, there existed extensive pantropical communicatio...

  7. Characterization of two complete Isospora mitochondrial genomes from passerine birds: Isospora serinuse in a domestic canary and Isospora manorinae in a yellow-throated miner.

    Science.gov (United States)

    Yang, Rongchang; Brice, Belinda; Oskam, Charlotte; Zhang, Yujuan; Brigg, Frances; Berryman, Dave; Ryan, Una

    2017-04-15

    The genus term Isospora is now applied specifically to parasites of birds, with the term Cystoisospora preferred for parasites which infect mammals. Isospora is a common parasitic coccidian in birds worldwide, especially in passerine birds, in which it can cause systemic coccidiosis. The complete mitochondrial genome sequences from two recently identified Isospora species; Isospora serinuse in a domestic canary and Isospora manorinae in a yellow-throated miner, were sequenced and compared with those of other closely related coccidian species. The complete mitochondrial genome sequence for Isospora serinuse is 6260bp in size and 6223bp for Isospora manorinae. The mitochondrial genomes of Isospora serinuse and Isospora manorinae include three protein-coding genes (COI, COIII and CytB), 19 LSU and 14 SSU rDNA fragments, including one newly identified putative LSU fragment in Isospora sp. The arrangement of coding regions in these two Isospora species were identical to that of available Isospora sp. and Eimeria spp. mitochondrial genomes and the start codon usage for protein coding genes was conservative. Phylogenetic analysis of the mt genome of the two Isospora species based on the three coding regions further support that the monophyletic nature of avian Isospora. Crown Copyright © 2017. Published by Elsevier B.V. All rights reserved.

  8. Human impacts quantification on the coastal landforms of Gran Canaria Island (Canary Islands)

    Science.gov (United States)

    Ferrer-Valero, Nicolás; Hernández-Calvento, Luis; Hernández-Cordero, Antonio I.

    2017-06-01

    The coastal areas of the Canary Islands are particularly sensitive to changes, both from a natural perspective and for their potential socio-economic implications. In this paper, the state of conservation of an insular coast is approached from a geomorphological point of view, considering recent changes induced by urban and tourism development. The analysis is applied to the coast of Gran Canaria, a small Atlantic island of volcanic origin, subject to a high degree of human pressure on its coastal areas, especially in recent decades. Currently, much of the economic activity of Gran Canaria is linked to mass tourism, associated with climatic and geomorphological features of the coast. This work is addressed through detailed mapping of coastal landforms across the island (256 km perimeter), corresponding to the period before the urban and tourism development (late 19th century for the island's capital, mid-20th century for the rest of the island) and today. The comparison between the coastal geomorphology before and after the urban and tourism development was established through four categories of human impacts, related to their conservation state: unaltered, altered, semi-destroyed and extinct. The results indicate that 43% of coastal landforms have been affected by human impacts, while 57% remain unaltered. The most affected are sedimentary landforms, namely coastal dunes, palaeo-dunes, beaches and wetlands. Geodiversity loss was also evaluated by applying two diversity indices. The coastal geodiversity loss by total or partial destruction of landforms is estimated at - 15.2%, according to Shannon index (H‧), while it increases to - 32.1% according to an index proposed in this paper. We conclude that the transformations of the coast of Gran Canaria induced by urban and tourism development have heavily affected the most singular coastal landforms (dunes, palaeo-dunes and wetlands), reducing significantly its geodiversity.

  9. Early Pliocene fishes (Chondrichthyes, Osteichthyes from Gran Canaria and Fuerteventura (Canary Islands, Spain

    Directory of Open Access Journals (Sweden)

    J. F. Betancort

    2016-11-01

    Full Text Available Fossil fish teeth are contained in marine deposits dated at ca 4.8 Ma found on the islands of Gran Canaria and Fuerteventura (Canary Islands, Spain. These islands, situated in the North Atlantic Subtropical Gyre, can be considered a mid-way stopover point between the Caribbean Sea, with the Central American Seaway about to close in this epoch, and the Mediterranean, in the first stage of its post-Messinian Gibraltar Seaway period. Accordingly, there existed extensive pantropical communication, particularly for nektonic animals capable of travelling large distances. In this paper, we present a number of fossil fishes, most of which are identified for the first time on the basis of their teeth: the Chondrichthyes species Carcharocles megalodon, Parotodus benedeni, Cosmopolitodus hastalis, Isurus oxyrinchus, Carcharias cf. acutissima, Carcharhinus cf. leucas, Carcharhinus cf. priscus, Galeocerdo cf. aduncus, and the Osteichthyes species Archosargus cinctus, Labrodon pavimentatum, and Diodon scillae. Coincidences are observed between these ichthyofauna and specimens found in the Azores Islands, the Pacific coast of America and the Mediterranean Sea.

  10. Early Pliocene fishes (Chondrichthyes, Osteichthyes) from Gran Canaria and Fuerteventura (Canary Islands, Spain)

    Energy Technology Data Exchange (ETDEWEB)

    Betancort, J.F.; Lomoschitz, A.; Meco, J.

    2016-07-01

    Fossil fish teeth are contained in marine deposits dated at ca 4.8 Ma found on the islands of Gran Canaria and Fuerteventura (Canary Islands, Spain). These islands, situated in the North Atlantic Subtropical Gyre, can be considered a mid-way stopover point between the Caribbean Sea, with the Central American Seaway about to close in this epoch, and the Mediterranean, in the first stage of its post-Messinian Gibraltar Seaway period. Accordingly, there existed extensive pantropical communication, particularly for nektonic animals capable of travelling large distances. In this paper, we present a number of fossil fishes, most of which are identified for the first time on the basis of their teeth: the Chondrichthyes species Carcharocles megalodon, Parotodus benedeni, Cosmopolitodus hastalis, Isurus oxyrinchus, Carcharias cf. acutissima, Carcharhinus cf. leucas, Carcharhinus cf. priscus, Galeocerdo cf. aduncus, and the Osteichthyes species Archosargus cinctus, Labrodon pavimentatum, and Diodon scillae. Coincidences are observed between these ichthyofauna and specimens found in the Azores Islands, the Pacific coast of America and the Mediterranean Sea. (Author)

  11. Mycobacterium tuberculosis infection in a canary (Serinus canana L.) and a blue-fronted Amazon parrot (Amazona amazona aestiva).

    Science.gov (United States)

    Hoop, Richard K

    2002-01-01

    I report two cases of mycobacteriosis in pet birds due to Mycobacterium tuberculosis and discuss the zoonotic implications. The canary with a tuberculous knot in the lung is the first description of M. tuberculosis in a nonpsittacine bird species.

  12. New xenophytes from Gran Canaria (Canary Islands, Spain, with emphasis on naturalized and (potentially invasive species

    Directory of Open Access Journals (Sweden)

    Verloove, F.

    2013-12-01

    Full Text Available Trabajos recientes de campo en Gran Canaria han facilitado el descubrimiento de nuevas localidades para plantas vasculares no nativas. Agave attenuata, Antigonon leptopus, Atriplex nummularia, Cascabela thevetia, Cenchrus echinatus, Cuscuta campestris, Diplachne fusca subsp. uninervia, Diplotaxis tenuifolia, Dysphania anthelmintica (hasta ahora confundida con D. ambrosioides, Eclipta prostrata, Euphorbia pulcherrima, Fagopyrum esculentum, Gossypium barbadense, Lablab purpureus, Lemna minuta, Opuntia leucotricha, Passiflora edulis, Pennisetum glaucum, Phaseolus acutifolius, Pluchea carolinensis, Prosopis juliflora, Salvia microphylla, Schinus terebinthifolius, Senna spectabilis, Solanum chrysotrichum, Tecoma stans, Tipuana tipu, Urochloa mutica, U. plantaginea y Washingtonia se citan por primera vez para las Islas Canarias, mientras que Alopecurus myosuroides, Amaranthus blitoides, Bothriochloa ischaemum var. songarica, Cardamine flexuosa subsp. debilis, Heliotropium curassavicum, Leonotis nepetifolia, Medicago lupulina, Parkinsonia aculeata, Physalis peruviana, Phytolacca americana y Turnera ulmifolia son nuevas para la flora de la isla de Gran Canaria. Finalmente, se confirma la presencia de Paspalum vaginatum, P. distichum y Cortaderia selloana en Gran Canaria.Trabajos recientes de campo en Gran Canaria han facilitado el descubrimiento de nuevas localidades para plantas vasculares no nativas. Agave attenuata, Antigonon leptopus, Atriplex nummularia, Cascabela thevetia, Cenchrus echinatus, Cuscuta campestris, Diplachne fusca subsp. uninervia, Diplotaxis tenuifolia, Dysphania anthelmintica (hasta ahora confundida con D. ambrosioides, Eclipta prostrata, Euphorbia pulcherrima, Fagopyrum esculentum, Gossypium barbadense, Lablab purpureus, Lemna minuta, Opuntia leucotricha, Passiflora edulis, Pennisetum glaucum, Phaseolus acutifolius, Pluchea carolinensis, Prosopis juliflora, Salvia microphylla, Schinus terebinthifolius, Senna spectabilis, Solanum

  13. Groundwater flow in a volcanic-sedimentary coastal aquifer: Telde area, Gran Canaria, Canary Islands, Spain

    Science.gov (United States)

    Cabrera, M. C.; Custodio, E.

    Groundwater conditions in a 75- km2 coastal area around the town of Telde in eastern Gran Canaria island have been studied. Pliocene to Recent volcanic materials are found, with an intercalated detrital formation (LPDF), which is a characteristic of the area. Groundwater development has become intensive since the 1950s, mostly for intensive agricultural irrigation and municipal water supply. The LPDF is one order of magnitude more transmissive and permeable than the underlying Phonolitic Formation when median values are compared (150 and 15 m2 day-1 5 and 0.5 m day-1, respectively). These two formations are highly heterogeneous and the ranges of expected well productivities partly overlap. The overlying recent basalts constituted a good aquifer several decades ago but now are mostly drained, except in the southern areas. Average values of drainable porosity (specific yield) seem to be about 0.03 to 0.04, or higher. Groundwater development has produced a conspicuous strip where the watertable has been drawn down as much as 40 m in 20 years, although the inland watertable elevation is much less affected. Groundwater reserve depletion contributes only about 5% of ed water, and more than 60% of this is transmitted from inland areas. Groundwater discharge into the sea may still be significant, perhaps 30% of total inflow to the area is discharged to the sea although this value is very uncertain. Les conditions de gisement de l'eau souterraine d'une région de 75 km2 de la côte Est de l'île de la Grande Canarie (archipel des Canaries), dans le secteur de Telde, ont été étudiées, en utilisant seulement les données fournies par les puits d'exploitation existants. Les matériaux volcaniques, d'âge Pliocène à sub-actuel, sont séparés par une formation détritique (FDLP), qui constitue la principale singularité de cette région. L'exploitation de l'eau souterraine est devenue intensive à partir de 1950, principalement pour des besoins d'irrigation (agriculture

  14. New xenophytes from Gran Canaria (Canary Islands, Spain), with emphasis on naturalized and (potentially) invasive species

    OpenAIRE

    Verloove, F.

    2013-01-01

    Trabajos recientes de campo en Gran Canaria han facilitado el descubrimiento de nuevas localidades para plantas vasculares no nativas. Agave attenuata, Antigonon leptopus, Atriplex nummularia, Cascabela thevetia, Cenchrus echinatus, Cuscuta campestris, Diplachne fusca subsp. uninervia, Diplotaxis tenuifolia, Dysphania anthelmintica (hasta ahora confundida con D. ambrosioides), Eclipta prostrata, Euphorbia pulcherrima, Fagopyrum esculentum, Gossypium barbadense, Lablab purpureus, Lemna minuta,...

  15. Contrasting recruitment seasonality of sea urchin species in Gran Canaria, Canary Islands (eastern Atlantic

    Directory of Open Access Journals (Sweden)

    S. GARCIA-SANZ

    2014-03-01

    Full Text Available Despite sea-urchins can play an important role affecting the community structure of subtidal bottoms, factors controlling the dynamics of sea-urchin populations are still poorly understood. We assessed the seasonal variation in recruitment of three sea-urchin species (Diadema africanum, Paracentrotus lividus and Arbacia lixula at Gran Canaria Island (eastern Atlantic via monthly deployment of artificial collectors throughout an entire annual cycle on each of four adjacent habitat patches (seagrasses, sandy patches, ‘urchin-grazed’ barrens and macroalgal-dominated beds within a shallow coastal landscape. Paracentrotus lividus and A. lixula had exclusively one main recruitment peak in late winter-spring. Diadema africanum recruitment was also seasonal, but recruits appeared in late summer-autumn, particularly on ‘urchin-grazed’ barrens with large abundances of adult conspecifics. In conclusion, this study has demonstrated non-overlapping seasonal recruitment patterns of the less abundant species (P. lividus and A. lixula with the most conspicuous species (D. africanum in the study area.

  16. Análisis geográfico de las actuales relaciones comerciales entre Canarias y Marruecos / Geographic analysis of commercial relations between the Canary Islands and Morocco

    Directory of Open Access Journals (Sweden)

    Ramón Díaz Hernández

    2014-12-01

    Full Text Available En este trabajo formulamos como hipótesis de partida que Canarias, como frontera meridional de Europa, en un contexto de creciente internacionalización, tiene en los mercados africanos una gran baza histórica que desempeñar. Dado el interés general que este asunto suscita entre las ciencias sociales, se requiere abordarlo desde el análisis geográfico. Para cumplimentar este estudio se emplearon las estadísticas que ofrecen organismos oficiales como el Instituto Nacional de Estadística, Instituto Canario de Estadística, Agencia Estatal de la Administración Tributaria, Instituto de Comercio Exterior y entidades internacionales como la Conferencia de las Naciones Unidas para el Comercio y el Desarrollo (UNCTAD y la Organización Mundial del Comercio (OCM.In this work we formulate the hypothesis that the Canary Islands, as Europe’s southern border, must develop an important role in African markets, in a context of increasing internationalization. Because of the general interest in this issue within the social sciences, to address it from the geographic analysis is required. This study is based, on the one hand, on statistics provided by Spanish government agencies such as the National Statistics Institute, the Canary Institute of Statistics, the State Tax Administration Agency and the Institute of Foreign Trade and, on the other hand, by international entities such as the United Nations Conference for Trade and Development (UNCTAD and the World Trade Organization (WTO.

  17. The quarry and workshop of Barranco Cardones (Gran Canaria, Canary Islands: Basalt quern production using stone tools

    Directory of Open Access Journals (Sweden)

    Yurena Naranjo-Mayor

    2016-09-01

    This paper analyses the operational sequence, that is, the different phases of the extraction and fashioning techniques of basalt rotary querns based on the recent finds of two quarries located near the coast (Cardones and Cebolla and a quern manufacturing workshop (Cave 36, Arucas Municipality in a ravine about 600 m inland. Traditionally it was thought that the Pre-European population of Gran Canaria fashioned their querns from naturally detached volcanic surface blocks collected in ravines or along the coast. This supposition was based on the idea that the early Canarians were not capable of extracting blocks from bedrock with stone tools. This notion, however, has been proven wrong by the circular extraction negatives on the quarry faces and by finds of stone fashioning tools in the workshop.

  18. Groundwater intensive exploitation and mining in Gran Canaria and Tenerife, Canary Islands, Spain: Hydrogeological, environmental, economic and social aspects.

    Science.gov (United States)

    Custodio, Emilio; Cabrera, María Del Carmen; Poncela, Roberto; Puga, Luis-Olavo; Skupien, Elzbieta; Del Villar, Alberto

    2016-07-01

    Intensive exploitation and continuous consumption of groundwater reserves (groundwater mining) have been real facts for decades in arid and semiarid areas. A summary of experience in the hydrogeological, economic, social and ethical consequences of groundwater intensive and mining exploitation in Gran Canaria and Tenerife Islands, in the Canarian Archipelago, is presented. Groundwater abstraction is less than recharge, but a significant outflow of groundwater to the sea cannot be avoided, especially in Tenerife, due to its younger volcanic coastal formations. Consequently, the intensive aquifer groundwater development by means of wells and water galleries (tunnels) has produced a groundwater reserve depletion of about 2km(3). Should current groundwater abstraction cease, the recovery time to close-to-natural conditions is from decades to one century, except in the mid and high elevations of Tenerife, where this recovery is not possible as aquifer formations will remain permanently drained by the numerous long water galleries. The socio-economic circumstances are complex due to a long standing history of water resources exploitation, successive social changes on each island, and well-established groundwater water trading, with complex relationships that affect water governance and the resulting ethical concerns. Gran Canaria and Tenerife are in an advanced groundwater exploitation stage and have a large water demand. They are good examples that allow drawing guidelines to evaluate groundwater development on other small high islands. After presenting the hydrogeological background, the socio-economic results are discussed to derive general knowledge to guide on water governance. Copyright © 2016 Elsevier B.V. All rights reserved.

  19. Long-term analysis of the role of Traganum moquinii plants in the foredune formation of an arid dunefield (Maspalomas, Gran Canaria, Canary Islands).

    Science.gov (United States)

    García-Romero, Leví; Hernández-Cordero, Antonio; Hernández-Calvento, Luis; Hesp, Patrick A.

    2017-04-01

    In recent decades, important environmental changes have been detected in dune systems around the world. Vegetation on the foredune provides stability to the coastal dunefields, capturing and accumulating sediments, which is an important function among other ecosystem services. For this reason, vegetation has been used as an indicator when studying anthropogenic and natural processes in the foredunes, especially when an increase of the vulnerability has been detected. Foredunes of arid dunefields have been little studied. They present significant differences with respect to the foredune of other climatic zones. Traganum moquinii is the predominant plant species in the foredune of arid dunefields around the Canary Islands (including South Morocco, Mauritania and other close archipelagos, like Cape Verde). This bush species plays an important geomorphological role: its interaction with the aeolian sedimentary processes generates nebkhas, shadow dunes and arid parabolic shaped dunes. The objective of this work is to show the morphometric evolution of the foredune of an arid dunefield of the Canary Islands, Maspalomas (Gran Canaria), as well as explaining the function of Traganum moquinii on it. One morphometric variable (number of nebkhas) and six morphologic variables of Traganum moquinii species (density, mean distance between Traganum moquinii individuals, number of Traganum moquinii individuals in line one, mean diameter of Traganum moquinii individuals in line one, mean distance between Traganum moquinii individuals in line one, density Traganum moquinii individuals in line one) have been measured in ten observation plots, from the 1960s to the present, through detailed historical aerial photographs and orthophotos, using GIS. The morphometric changes have been identified, and the variables have been related from statistical analysis to detect the function exerted by Traganum moquinii species in the foredune. The change in the number of nebkhas enables the

  20. Groundwater salinity and hydrochemical processes in the volcano-sedimentary aquifer of La Aldea, Gran Canaria, Canary Islands, Spain.

    Science.gov (United States)

    Cruz-Fuentes, Tatiana; Cabrera, María del Carmen; Heredia, Javier; Custodio, Emilio

    2014-06-15

    The origin of the groundwater salinity and hydrochemical conditions of a 44km(2) volcano-sedimentary aquifer in the semi-arid to arid La Aldea Valley (western Gran Canaria, Spain) has been studied, using major physical and chemical components. Current aquifer recharge is mainly the result of irrigation return flows and secondarily that of rainfall infiltration. Graphical, multivariate statistical and modeling tools have been applied in order to improve the hydrogeological conceptual model and identify the natural and anthropogenic factors controlling groundwater salinity. Groundwater ranges from Na-Cl-HCO3 type for moderate salinity water to Na-Mg-Cl-SO4 type for high salinity water. This is mainly the result of atmospheric airborne salt deposition; silicate weathering, and recharge incorporating irrigation return flows. High evapotranspiration produces significant evapo-concentration leading to relative high groundwater salinity in the area. Under average conditions, about 70% of the water used for intensive agricultural exploitation in the valley comes from three low salinity water runoff storage reservoirs upstream, out of the area, while the remaining 30% derives from groundwater. The main alluvial aquifer behaves as a short turnover time reservoir that adds to the surface waters to complement irrigation water supply in dry periods, when it reaches 70% of irrigation water requirements. The high seasonality and intra-annual variability of water demand for irrigation press on decision making on aquifer use by a large number of aquifer users acting on their own. Copyright © 2014 Elsevier B.V. All rights reserved.

  1. Canary literature and culture in the reign of Carlos IV (1788-1808 La literatura y la cultura canaria durante el reinado de Carlos IV (1788-1808

    Directory of Open Access Journals (Sweden)

    Victoria GALVÁN GONZÁLEZ

    2012-01-01

    Full Text Available This work wants to offer a short view of the literature and culture developed in the Canary Isles during the reign period of Charles IV, from a general point of view. Therefore, I cannot offer a detailed perspective of each of the aspects dealt with. This way, what is tackled in this work is a revision of the socio-cultural activities connected to the gatherings or to the economic societies, the educative circumstances, the activity developed by the bishops with the carrying out of facilities or with a reforming teaching at the reading level, such as Tavira, the production of books with an allusion to the printing activity, the most developed literary genres and their authors, the topic preference in poetry —majority genre—, in prose and in theatre, and an allusion to some of the private libraries.Este trabajo quiere ofrecer un panorama sintético de la literatura y la cultura desarrollada en Canarias durante el reinado de Carlos IV, atendiendo a sus trazos generales. No puede ofrecer, por tanto, una atención detenida de cada uno de los aspectos abordados. Así se hace una revisión de las actividades socioculturales ligadas a las tertulias o a las sociedades económicas, las circunstancias educativas, la actividad desplegada por los obispos con la realización de infraestructuras o con un magisterio reformista en el plano de las lecturas, como Tavira, la producción de libros con alusión a la actividad impresora, los géneros literarios más cultivados y sus autores, las preferencias temáticas en poesía —género mayoritario—, en prosa y en teatro, y alusión a algunas de las bibliotecas particulares.

  2. Exemple d'etude geochimique et isotopique de circulations aquiferes en terrain volcanique sous climat semi-aride (Amurga, Gran Canaria, Iles Canaries)

    Science.gov (United States)

    Gasparini, Anne; Custodio, Emilio; Fontes, Jean-Charles; Jimenez, José; Nuñez, JoséAntonio

    1990-03-01

    A hydrochemical and isotopic study of a groundwater flow system in volcanic media has been carried out in the southern part of Gran Canaria (Canary Islands). Monthly samples of precipitation were collected over a two year period at stations distributed all over the island. Sampling of groundwaters took place mainly from drillholes in the Amurga phonolitic massif but also from wells and springs discharging from the volcanic and related detrital formations. The δ 2H vs. δ 18O relationship of the precipitation is close to the "global meteoric water line". Two distinct altitudinal isotopic gradients are observed. On the warm and dry southern slope, the combination of a contribution of saharan dusts and seasprays and of partial evaporation explains the high content of dissolved salts (Cl -, SO 2-4) in precipitation. Additional processes may be invoked as sources of groundwater mineralization: leaching of silicate minerals during infiltration and/or from hydrolysis during the long residence time of the waters in the volcanic rocks. Salt content is increased through a concentration of the percolating solutions by evaporation, as shown by their stable isotope contents ( 18O, 2H). The groundwaters in the phonolitic aquifer are well differentiated from the deeper groundwaters, which are recharged at an altitude of about 1000m above sea level, or even less, if exceptional episodes of rain have a lower heavy isotope content. The interpretation of the 13C contents of soil CO 2, sampled throughout the area, and of the 13C and 14C contents of total dissolved inorganic carbon (TDIC) leads to the concept of an incorporation of pure biogenic carbon under open-system conditions in the Amurga waters. For these groundwaters, high estimates of residence time (ca. 11000 years) can be calculated from the low 14C activities. In the neighbouring valleys, the input of deep "dead" volcanic carbon and the occurrence of mixing do not allow an exact quantification of residence time values

  3. Hormonal acceleration of song development illuminates motor control mechanism in canaries.

    Science.gov (United States)

    Alliende, Jorge A; Méndez, Jorge M; Goller, Franz; Mindlin, Gabriel B

    2010-12-01

    In songbirds, the ontogeny of singing behavior shows strong parallels with human speech learning. As in humans, development of learned vocal behavior requires exposure to an acoustic model of species-typical vocalizations, and, subsequently, a sensorimotor practice period after which the vocalization is produced in a stereotyped manner. This requires mastering motor instructions driving the vocal organ and the respiratory system. Recently, it was shown that, in the case of canaries (Serinus canaria), the diverse syllables, constituting the song, are generated with air sac pressure patterns with characteristic shapes, remarkably, those belonging to a very specific mathematical family. Here, we treated juvenile canaries with testosterone at the onset of the sensorimotor practice period. This hormone exposure accelerated the development of song into stereotyped adultlike song. After 20 days of testosterone treatment, subsyringeal air sac pressure patterns of song resembled those produced by adults, while those of untreated control birds of the same age did not. Detailed temporal structure and modulation patterns emerged rapidly with testosterone treatment, and all previously identified categories of adult song were observed. This research shows that the known effect of testosterone on the neural circuits gives rise to the stereotyped categories of respiratory motor gestures. Extensive practice of these motor patterns during the sensorimotor phase is not required for their expression. Copyright © 2010 Wiley Periodicals, Inc.

  4. Comparative Cytogenetics between Two Important Songbird, Models: The Zebra Finch and the Canary.

    Science.gov (United States)

    Dos Santos, Michelly da Silva; Kretschmer, Rafael; Frankl-Vilches, Carolina; Bakker, Antje; Gahr, Manfred; O Brien, Patricia C M; Ferguson-Smith, Malcolm A; de Oliveira, Edivaldo H C

    2017-01-01

    Songbird species (order Passeriformes, suborder Oscines) are important models in various experimental fields spanning behavioural genomics to neurobiology. Although the genomes of some songbird species were sequenced recently, the chromosomal organization of these species is mostly unknown. Here we focused on the two most studied songbird species in neuroscience, the zebra finch (Taeniopygia guttata) and the canary (Serinus canaria). In order to clarify these issues and also to integrate chromosome data with their assembled genomes, we used classical and molecular cytogenetics in both zebra finch and canary to define their chromosomal homology, localization of heterochromatic blocks and distribution of rDNA clusters. We confirmed the same diploid number (2n = 80) in both species, as previously reported. FISH experiments confirmed the occurrence of multiple paracentric and pericentric inversions previously found in other species of Passeriformes, providing a cytogenetic signature for this order, and corroborating data from in silico analyses. Additionally, compared to other Passeriformes, we detected differences in the zebra finch karyotype concerning the morphology of some chromosomes, in the distribution of 5S rDNA clusters, and an inversion in chromosome 1.

  5. Whole-genome characterization of a novel polyomavirus detected in fatally diseased canary birds.

    Science.gov (United States)

    Halami, Mohammad Yahya; Dorrestein, Gerry M; Couteel, Peter; Heckel, Gerald; Müller, Hermann; Johne, Reimar

    2010-12-01

    Polyomaviruses of birds are aetiological agents of acute inflammatory diseases in non-immunocompromised hosts, which is in contrast to mammalian polyomaviruses. VP4, an additional structural protein encoded by the viral genomes of the known avian polyomaviruses, has been suggested to contribute to pathogenicity through loss of cells following induction of apoptosis. Four distinct bird polyomaviruses have been identified so far, which infect crows, finches, geese and parrots. Using broad-spectrum PCR, a novel polyomavirus, tentatively designated canary polyomavirus (CaPyV), was detected in diseased canary birds (Serinus canaria) that died at an age of about 40 days. Intranuclear inclusion bodies were found in the liver, spleen and kidneys. The entire viral genome was amplified from a tissue sample using rolling-circle amplification. Phylogenetic analysis of the genome sequence indicated a close relationship between CaPyV and other avian polyomaviruses. Remarkably, an ORF encoding VP4 could not be identified in the CaPyV genome. Therefore, the mechanism of pathogenicity of CaPyV may be different from that of the other avian polyomaviruses.

  6. Comparative Cytogenetics between Two Important Songbird, Models: The Zebra Finch and the Canary

    Science.gov (United States)

    dos Santos, Michelly da Silva; Kretschmer, Rafael; Frankl-Vilches, Carolina; Bakker, Antje; Gahr, Manfred; O´Brien, Patricia C. M.; Ferguson-Smith, Malcolm A.

    2017-01-01

    Songbird species (order Passeriformes, suborder Oscines) are important models in various experimental fields spanning behavioural genomics to neurobiology. Although the genomes of some songbird species were sequenced recently, the chromosomal organization of these species is mostly unknown. Here we focused on the two most studied songbird species in neuroscience, the zebra finch (Taeniopygia guttata) and the canary (Serinus canaria). In order to clarify these issues and also to integrate chromosome data with their assembled genomes, we used classical and molecular cytogenetics in both zebra finch and canary to define their chromosomal homology, localization of heterochromatic blocks and distribution of rDNA clusters. We confirmed the same diploid number (2n = 80) in both species, as previously reported. FISH experiments confirmed the occurrence of multiple paracentric and pericentric inversions previously found in other species of Passeriformes, providing a cytogenetic signature for this order, and corroborating data from in silico analyses. Additionally, compared to other Passeriformes, we detected differences in the zebra finch karyotype concerning the morphology of some chromosomes, in the distribution of 5S rDNA clusters, and an inversion in chromosome 1. PMID:28129381

  7. Changes in infiltration rate into Andisols for change of use (Tenerife, Canary I.); Influencia del cambio de uso en la tasa de infiltracion de Andisoles (Tenerife, I. Canarias)

    Energy Technology Data Exchange (ETDEWEB)

    Neris, J.; Fuentes, J.; Dorta, M. A.; Jimenez, C.; Tejedor, M.

    2009-07-01

    The volcanic island of Tenerife (Canary Islands) has a wide variety of Andisols which have formed on recent pyroclast materials (Udands, Ustands, Xerands and Vitrands. The Udands are situated on the nor then side of the island, at heights where condensation of the trade winds occurs (900-1600m), while the Ustands are also located mostly on this side, albeit at a lower attitudinal strip. Under natural conditions, these soils present favourable physical properties, with high structural stability and resistance to water erosion. (Author) 11 refs.

  8. Dissociable Effects on Birdsong of Androgen Signaling in Cortex-Like Brain Regions of Canaries.

    Science.gov (United States)

    Alward, Beau A; Balthazart, Jacques; Ball, Gregory F

    2017-09-06

    The neural basis of how learned vocalizations change during development and in adulthood represents a major challenge facing cognitive neuroscience. This plasticity in the degree to which learned vocalizations can change in both humans and songbirds is linked to the actions of sex steroid hormones during ontogeny but also in adulthood in the context of seasonal changes in birdsong. We investigated the role of steroid hormone signaling in the brain on distinct features of birdsong using adult male canaries (Serinus canaria), which show extensive seasonal vocal plasticity as adults. Specifically, we bilaterally implanted the potent androgen receptor antagonist flutamide in two key brain regions that control birdsong. We show that androgen signaling in the motor cortical-like brain region, the robust nucleus of the arcopallium (RA), controls syllable and trill bandwidth stereotypy, while not significantly affecting higher order features of song such syllable-type usage (i.e., how many times each syllable type is used) or syllable sequences. In contrast, androgen signaling in the premotor cortical-like brain region, HVC (proper name), controls song variability by increasing the variability of syllable-type usage and syllable sequences, while having no effect on syllable or trill bandwidth stereotypy. Other aspects of song, such as the duration of trills and the number of syllables per song, were also differentially affected by androgen signaling in HVC versus RA. These results implicate androgens in regulating distinct features of complex motor output in a precise and nonredundant manner.SIGNIFICANCE STATEMENT Vocal plasticity is linked to the actions of sex steroid hormones, but the precise mechanisms are unclear. We investigated this question in adult male canaries (Serinus canaria), which show extensive vocal plasticity throughout their life. We show that androgens in two cortex-like vocal control brain regions regulate distinct aspects of vocal plasticity. For

  9. Transversalidad e impacto de género: de las políticas a los programas. Estudio de caso en las Islas Canarias=Gender mainstreaming and impact: from policies to programs. A case study in the Canary Islands

    Directory of Open Access Journals (Sweden)

    Carmen Ascanio Sánchez

    2017-06-01

    Full Text Available Resumen La transversalidad de género es un concepto ampliamente difundido y defendido que, sin embargo, también ha sido criticado por su ambigüedad y polisemia. Si bien este enfoque debe atravesar los diferentes niveles -desde las políticas a los programas-, la práctica muestra un modelo dual y desarticulado entre, por una parte, los marcos estratégicos y por otro, la puesta en marcha de acciones específicas. A partir de un estudio de caso en las Islas Canarias y de una evaluación de impacto de género (Acogida temprana, se identifican debilidades, oportunidades y contradicciones en la práctica de la transversalidad, mostrando como a través de este tipo de evaluaciones pueden desarrollarse estrategias y herramientas para implementar la articulación entre los niveles.   Abstract  “Gender mainstreaming” is an oft-used, broadly supported term that, however, has also been criticized for being an ambiguous word with multiple meanings. In theory, mainstreaming should cut across all different levels -from policies to programs-, but practice has shown that the model tends to be both dual and disjointed, focusing on strategic frameworks on the one hand and the implementation of specific actions on the other. Using a case study on the Canary Islands and a gender impact assessment (in early childcare, this paper identifies weaknesses, opportunities and contradictions in mainstreaming as it plays out in practice, showing how this type of assessment can be used to develop strategies and tools for linking up the various levels of implementation.

  10. Bilateral coordination and the motor basis of female preference for sexual signals in canary song.

    Science.gov (United States)

    Suthers, Roderick A; Vallet, Eric; Kreutzer, Michel

    2012-09-01

    The preference of female songbirds for particular traits in the songs of courting males has received considerable attention, but the relationship of preferred traits to male quality is poorly understood. Female domestic canaries (Serinus canaria, Linnaeus) preferentially solicit copulation with males that sing special high repetition rate, wide-band, multi-note syllables, called 'sexy' or A-syllables. Syllables are separated by minibreaths but each note is produced by pulsatile expiration, allowing high repetition rates and long duration phrases. The wide bandwidth is achieved by including two notes produced sequentially on opposite sides of the syrinx, in which the left and right sides are specialized for low or high frequencies, respectively. The emphasis of low frequencies is facilitated by a positive relationship between syllable repetition rate and the bandwidth of the fundamental frequency of notes sung by the left syrinx, such that bandwidth increases with increasing syllable repetition rate. The temporal offset between notes prevents cheating by unilaterally singing a note on the left side with a low fundamental frequency and prominent higher harmonics. The syringeal and respiratory motor patterns by which sexy syllables are produced support the hypothesis that these syllables provide a sensitive vocal-auditory indicator of a male's performance limit for the rapid, precisely coordinated interhemispheric switching, which is essential for many sensory and motor processes involving specialized contributions from each cerebral hemisphere.

  11. Low-dimensional dynamical model for the diversity of pressure patterns used in canary song.

    Science.gov (United States)

    Alonso, Leandro M; Alliende, Jorge A; Goller, F; Mindlin, Gabriel B

    2009-04-01

    During song production, oscine birds produce large air sac pressure pulses. During those pulses, energy is transferred to labia located at the juncture between the bronchii and the trachea, inducing the high frequency labial oscillations which are responsible for airflow modulations, i.e., the uttered sound. In order to generate diverse syllables, canaries (Serinus canaria) use a set of air sac pressure patterns with characteristic shapes. In this work we show that these different shapes can be approximated by the subharmonic solutions of a forced normal form. This simple model is built from identifying dynamical elements which allow to reproduce the shape of the pressure pattern corresponding to one syllable type. Remarkably, integrating that simple model for other parameters allows to recover the other pressure patterns used during song. Interpreting the diversity of these physiological gestures as subharmonic solutions of a simple nonlinear system allows us to account simultaneously for their morphological features as well as for the syllabic timing and suggests a strategy for the generation of complex motor patterns.

  12. Heaven it's my wife! Male canaries conceal extra-pair courtships but increase aggressions when their mate watches.

    Directory of Open Access Journals (Sweden)

    Davy Ung

    Full Text Available Many animals live in a communication network, an environment where individuals can obtain information about competitors or potential mates by observing interactions between conspecifics. In such an environment, interactants might benefit by changing their signalling behaviour in the presence of an audience. This audience effect seems widespread among species, has been observed during various types of interaction (e.g. intra-sexual vs. inter-sexual interaction and varies according to the social context (e.g. gender, hierarchical or mating status of the audience. However, the way individuals might adapt their signalling behaviour to a combination of these factors remains poorly understood. To address this question, we studied how the presence of an audience affects the behaviour of male domestic canaries Serinus canaria during two types of interactions: (i an extra-pair interaction and (ii a male-male competition for food. Males were observed under three conditions: (a in the absence of audience, (b in the presence of their mate or (c of a familiar female. Our results show that male domestic canaries minutely adapt their courting and agonistic behaviours to a combination of: (i the type of interaction (extra-pair interaction/male-male competition, (ii the social context (mate, familiar female or nobody in audience and (iii the behaviours of both the audience and the interactant. These results highlight the ability of animals to subtly adapt their behaviour to the social environment. This also raises questions about the cognitive foundations and evolution of these processes especially considering that canaries are known neither for having high cognitive abilities nor for being a typical example for the social intelligence hypothesis.

  13. Dissociable effects of social context on song and doublecortin immunoreactivity in male canaries.

    Science.gov (United States)

    Alward, Beau A; Mayes, Wade D; Peng, Katherine; Stevenson, Tyler J; Balthazart, Jacques; Ball, Gregory F

    2014-09-01

    Variation in environmental factors such as day length and social context greatly affects reproductive behavior and the brain areas that regulate these behaviors. One such behavior is song in songbirds, which males use to attract a mate during the breeding season. In these species the absence of a potential mate leads to an increase in the number of songs produced, while the presence of a mate greatly diminishes singing. Interestingly, although long days promote song behavior, producing song itself can promote the incorporation of new neurons in brain regions controlling song output. Social context can also affect such neuroplasticity in these song control nuclei. The goal of the present study was to investigate in canaries (Serinus canaria), a songbird species, how photoperiod and social context affect song and the incorporation of new neurons, as measured by the microtubule-associated protein doublecortin (DCX) in HVC, a key vocal production brain region of the song control system. We show that long days increased HVC size and singing activity. In addition, male canaries paired with a female for 2 weeks showed enhanced DCX-immunoreactivity in HVC relative to birds housed alone. Strikingly, however, paired males sang fewer songs that exhibited a reduction in acoustic features such as song complexity and energy, compared with birds housed alone, which sang prolifically. These results show that social presence plays a significant role in the regulation of neural and behavioral plasticity in songbirds and can exert these effects in opposition to what might be expected based on activity-induced neurogenesis. © 2014 Federation of European Neuroscience Societies and John Wiley & Sons Ltd.

  14. La llegada del offset a la prensa de Canarias: implicaciones en el tratamiento de la imagen The arrival of the offset printing system to the press in the Canary Islands: implications in the image treatment

    Directory of Open Access Journals (Sweden)

    Alberto Ardèvol Abreu

    2011-07-01

    Full Text Available El presente artículo forma parte de un trabajo de investigación más extenso sobre la evolución de la fotografía de prensa en Canarias desde el período 1975-1980 hasta la primera década del siglo XXI. Durante la segunda mitad de la década de 1970 se produjo en el archipiélago, de manera paulatina, la transición del sistema de impresión tipográfica al sistema offset. A través de estas páginas pretendemos analizar la influencia que tuvo en la fotografía de prensa de las islas la llegada de este nuevo sistema de impresión, que mejoró de manera significativa la calidad física de los periódicos del archipiélago. La impresión offset, mucho más limpia que su predecesora tipográfica, se publicitaba en Inglaterra bajo el lema “We don't print on your hand, we print on paper” (no imprimimos en sus manos, imprimimos el papel. Los cambios se llevaron a cabo de forma muy gradual, casi imperceptible en un primer momento, coincidiendo, además, con los años de transición política, y trajeron consigo modificaciones en la serie visual no lingüística (fotografías, dibujos, color..., así como en los restantes elementos del periódico, desde el formato al diseño, pasando incluso por los contenidos. Los resultados obtenidos se basan en el muestreo sistemático de dos de las cabeceras más importantes en aquellos momentos en las islas: El tinerfeño El Día y el vespertino Diario de Las Palmas.This article is part of a more extensive research on the evolution of press photography in the Canary Islands from the period 1975-1980 up to the first decade of the 21st century. In the second half of the 1970s it took place in the archipelago a gradually transition from the typographic printing system to the offset printing system. In these pages we try to analyze the influence that the arrival of this new printing system had in the photography of press of the islands, which improved in a significant way the physical quality of the Canarian

  15. Two new species of the genus Peristenus Foerster (Hymenoptera: Braconidae: Euphorinae) from the Canary Islands

    NARCIS (Netherlands)

    Achterberg, van C.; Guerrero, E.R.

    2003-01-01

    Two new species of the genus Peristenus Foerster (Hymenoptera: Braconidae: Euphorinae) from the Canary Islands are described and illustrated: Peristenus angifemoralis spec. nov. from Tenerife, and P. gloriae spec. nov. from Gran Canaria and Tenerife.

  16. Effect of repeated exposure to Plasmodium relictum (lineage SGS1) on infection dynamics in domestic canaries.

    Science.gov (United States)

    Cellier-Holzem, Elise; Esparza-Salas, Rodrigo; Garnier, Stéphane; Sorci, Gabriele

    2010-10-01

    Parasites are known to exert strong selection pressures on their hosts and, as such, favour the evolution of defence mechanisms. The negative impact of parasites on their host can have substantial consequences in terms of population persistence and the epidemiology of the infection. In natural populations, however, it is difficult to assess the cost of infection while controlling for other potentially confounding factors. For instance, individuals are repeatedly exposed to a variety of parasite strains, some of which can elicit immunological memory, further protecting the host from subsequent infections. Cost of infection is, therefore, expected to be particularly strong for primary infections and to decrease for individuals surviving the first infectious episode that are re-exposed to the pathogen. We tested this hypothesis experimentally using avian malaria parasites (Plasmodium relictum-lineage SGS1) and domestic canaries (Serinus canaria) as a model. Hosts were infected with a controlled dose of P. relictum as a primary infection and control birds were injected with non-infected blood. The changes in haematocrit and body mass were monitored during a 20 day period. A protein of the acute phase response (haptoglobin) was assessed as a marker of the inflammatory response mounted in response to the infection. Parasite intensity was also monitored. Surviving birds were then re-infected 37 days post primary infection. In agreement with the predictions, we found that primary infected birds paid a substantially higher cost in terms of infection-induced reduction in haematocrit compared with re-exposed birds. After the secondary infection, re-exposed hosts were also able to clear the infection at a faster rate than after the primary infection. These results have potential consequences for the epidemiology of avian malaria, since birds re-exposed to the pathogen can maintain parasitemia with low fitness costs, allowing the persistence of the pathogen within the host

  17. Expression of reelin, its receptors and its intracellular signaling protein, Disabled1 in the canary brain: relationships with the song control system.

    Science.gov (United States)

    Balthazart, J; Voigt, C; Boseret, G; Ball, G F

    2008-06-02

    Songbirds produce learned vocalizations that are controlled by a specialized network of neural structures, the song control system. Several nuclei in this song control system demonstrate a marked degree of adult seasonal plasticity. Nucleus volume varies seasonally based on changes in cell size or spacing, and in the case of nucleus HVC and area X on the incorporation of new neurons. Reelin, a large glycoprotein defective in reeler mice, is assumed to determine the final location of migrating neurons in the developing brain. In mammals, reelin is also expressed in the adult brain but its functions are less well characterized. We investigated the relationships between the expression of reelin and/or its receptors and the dramatic seasonal plasticity in the canary (Serinus canaria) brain. We detected a broad distribution of the reelin protein, its mRNA and the mRNAs encoding for the reelin receptors (VLDLR and ApoER2) as well as for its intracellular signaling protein, Disabled1. These different mRNAs and proteins did not display the same neuroanatomical distribution and were not clearly associated, in an exclusive manner, with telencephalic brain areas that incorporate new neurons in adulthood. Song control nuclei were associated with a particular specialized expression of reelin and its mRNA, with the reelin signal being either denser or lighter in the song nucleus than in the surrounding tissue. The density of reelin-immunoreactive structures did not seem to be affected by 4 weeks of treatment with exogenous testosterone. These observations do not provide conclusive evidence that reelin plays a prominent role in the positioning of new neurons in the adult canary brain but call for additional work on this protein analyzing its expression comparatively during development and in adulthood with a better temporal resolution at critical points in the reproductive cycle when brain plasticity is known to occur.

  18. First record of Holocentrus ascensionis (Osbeck, 1765 (Osteichthyes: Holocentridae in the Canary Islands (Central-east Atlantic

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    José J. Castro-Hernández

    2000-03-01

    Full Text Available The capture of a specimen of Holocentrus ascensionis (Osbeck, 1765, a species previously unrecorded in the Eastern Atlantic north of Gabon, is reported from Gran Canaria Island (Canary Islands, Central-East Atlantic.

  19. Biometric variation in Spadella cephaloptera on the Canary Islands (Chaetognatha)

    NARCIS (Netherlands)

    Broerse, Alexandra T.C.

    1993-01-01

    Specimens of Spadella cephaloptera from Tenerife, Gran Canaria and Gomera (Canary Islands) were compared biometrically in regards to morphometric and meristic characters. Variation exists among the populations on the islands as well as between the islands. The populations on Gomera seem more

  20. The submarine eruption of La Restinga (El Hierro, Canary Islands): October 2011-March 2012; La erupcion submarina de La Restinga en la isla de El Hierro, Canarias: Octubre 2011-Marzo 2012

    Energy Technology Data Exchange (ETDEWEB)

    Perez-Torrado, F. J.; Carracedo, J. C.; Rodriguez-Gonzalez, A.; Soler, V.; Troll, V. R.; Wiesmaier, S.

    2012-11-01

    The first signs of renewed volcanic activity at El Hierro began in July 2011 with the occurrence of abundant, low-magnitude earthquakes. The increasing seismicity culminated on October 10, 2011, with the onset of a submarine eruption about 2 km offshore from La Restinga, the southernmost village on El Hierro. The analysis of seismic and deformation records prior to, and throughout, the eruption allowed the reconstruction of its main phases: 1) ascent of magma and migration of hypo centres from beneath the northern coast (El Golfo) towards the south rift zone, close to La Restinga, probably marking the hydraulic fracturing and the opening of the eruptive conduit; and 2) onset and development of a volcanic eruption indicated by sustained and prolonged harmonic tremor whose intensity varied with time. The features monitored during the eruption include location, depth and morphological evolution of the eruptive source and emission of floating volcanic bombs. These bombs initially showed white, vesiculated cores (originated by partial melting of underlying pre-volcanic sediments upon which the island of El Hierro was constructed) and black basanite rims, and later exclusively hollow basanitic lava balloons. The eruptive products have been matched with a fissural submarine eruption without ever having attained surtseyan explosiveness. The eruption has been active for about five months and ended in March 2012, thus becoming the second longest reported historical eruption in the Canary Islands after the Timanfaya eruption in Lanzarote (1730-1736). This eruption provided the first opportunity in 40 years to manage a volcanic crisis in the Canary Islands and to assess the interpretations and decisions taken, thereby gaining experience for improved management of future volcanic activity. Seismicity and deformation during the eruption were recorded and analysed by the Instituto Geografico Nacional (IGN). Unfortunately, a lack of systematic sampling of erupted pyroclasts and

  1. LA ARQUEOLOGÍA HISTÓRICA EN CANARIAS. EL YACIMIENTO SEPULCRAL DE LA IGLESIA DE NUESTRA SEÑORA DE LA CONCEPCIÓN DE SANTA CRUZ DE TENERIFE (Historical archaeology in the Canaries. The burial site of the church of Our Lady of the Conception in Santa Cruz de Tenerife

    Directory of Open Access Journals (Sweden)

    Matilde Arnay de la Rosa

    2009-09-01

    Full Text Available En este estudio revisamos la situación actual de la Arqueología Histórica en las Islas Canarias, disciplina que, a diferencia de la americana, estaba poco desarrollada en las islas hasta hace unos 20 años. El reciente estudio de yacimientos históricos importantes ha modificado esta situación. Como ejemplo, comentamos algunos resultados derivados de la excavación de la iglesia de Nuestra Señora de la Concepción, en cuyo subsuelo se enterró a la población de Santa Cruz de Tenerife durante siglos. Pese a la pobre preservación de los esqueletos, ha sido posible inferir hábitos dietéticos, estado nutricional, exposición a tóxicos, y realizar estudios de DNA mitocondrial. El material recuperado (cerámica, pipas, crucifijos y adornos varios permite establecer estrechas relaciones con la colonización española del Nuevo Mundo. ENGLISH: This study includes an updated review of the current status of Historical Archaeology in the Canary Islands. Traditionally, in contrast with the situation in America, archaeological activity was devoted to studies on the prehistoric remains of population. In the last 20 years, excavation of some important historical sites has allowed the development of Historical Archaeology. As an example, we comment some results obtained from the excavation of the floor of the church of Our Lady of the Conception, where the deads of Santa Cruz de Tenerife were interred during centuries. Despite the poor preservation of the skeletons, it has been possible to infer dietary habits, toxic exposure, nutritional status and genetic lineages (mitochondrial DNA. Smoking pipes, ceramics and adornments associated with interments show a high similitude with those from colonial sites of the New World.

  2. Deformation in volcanic areas: a numerical approach for their prediction in Teide volcano (Tenerife, Canary Islands); Deformaciones en areas volcanicas: una aproximacin numerica para su prediccion en el volcan Teide (Tenerife, Islas Canarias)

    Energy Technology Data Exchange (ETDEWEB)

    Charco, M.; Galan del Sastre, P.

    2011-07-01

    Active volcanic areas study comprises both, observation of physical changes in the natural media and the interpretation of such changes. Nowadays, the application of spatial geodetic techniques, such as GPS (Global Positioning System) or InSAR (Interferometry with Synthetic Aperture Radar), for deformation understanding in volcanic areas, revolutionizes our view of this geodetic signals. Deformation of the Earth's surface reflects tectonic, magmatic and hydrothermal processes at depth. In this way, the prediction of volcanic deformation through physical modelling provides a link between the observation and depth interior processes that could be crucial for volcanic hazards assessment. In this work, we develop a numerical model for elastic deformation study. The Finite Element Method (FEM) is used for the implementation of the numerical model. FEM allows to take into account different morphology, structural characteristics and the mechanical heterogeneities of the medium. Numerical simulations of deformation in Tenerife (Canary Islands) taking into account different medium hypothesis allow us to conclude that the accuracy of the predictions depends on how well the natural system is described. (Author) 22 refs.

  3. Foundations and anchors for a 250 m span arch bridge in la Palma Island (Canaries); Cimentaciones y anclajes para la construccion del Arco de los tilos, de 250 m. de luz, en la isla de la Palma (Canarias)

    Energy Technology Data Exchange (ETDEWEB)

    Simic Sureda, D.

    2008-07-01

    There are no simple procedures to estimate the bearing capacity of direct foundations on rock due to its anisotropy, as the criteria have to take into account different features concerning the rock discontinuities (spacing, orientation, opening, persistence,...) as well as other aspects concerning the rock matrix, particularly its strength when it is low. In this sense, the volcanic formations of the Canary Island pose important difficulties to the designer of foundations given their highly anisotropic fabric, which is the result of a complex origin where the basalt sheets alternate with fragmentary material of pyroclastic nature. This volcanic building is frequently intersected by old vents, in the guise of pipes plugged with broken fragments of low compacity. In a valley of highly dissected steep slopes of such geology an arch bridge has been designed and built with a span between supports of 250 m. This paper describes the analysis that was carried out to take into account the particularities of rock anisotropy and the foundations geometry in very steep slopes. The construction problems are also addressed in the paper, describing the grouting treatment that was needed in one of the supports due to the presence of an old vent. (Author) 7 refs.

  4. El modelo turistico de canarias

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    Josefina Dominguez Mujica

    2010-11-01

    Full Text Available Le développement du tourisme de masses dans les Îles Canaries a commencé au début des années 1960. Le modèle adopté repose sur les mêmes logiques que les aménagements touristiques des littoraux méditerranéens espagnols qui ont abouti à d’intenses processus d’urbanisation. Actuellement, la fréquentation touristique de l’archipel indique la préférence des clientèles de l’Ouest-européen, surtout des allemandes et britanniques. Le tourisme s’est affirmé comme le véritable moteur de l’économie de l’archipel.The development of mass tourism in the Canary Islands started in middle of the 20th century, at the beginning of the 60’s. The adopted model was contemporary and very similar to the model of other coastal areas of the Spanish State, which were affected by an intense urbanization process. Nowadays, the profile of the tourism that visits us shows the preference of Centre-European citizens for this destiny, predominately German and British. As regards the tourist offer, the tour-operators policy, the environmental and patrimonial factors, as well as the institutional and managerial support have been definitive. That’s why this sector has become the motor of the archipelago’s economy.El desarrollo del turismo de masas en Canarias se inició a principios de la década de los años sesenta del siglo XX. El modelo adoptado fue coetáneo y muy semejante al de otras zonas litorales del Estado español, que se vieron afectadas por un intenso proceso de urbanización. Acutalmente, el perfil del turismo que nos visita nos indica la preferencia de los centroeuropeos por este destino, predominantemente, de los alemanes y británicos. En cuanto a la oferta turística, la política de los tour-operadores, los factores medio-ambientales y patrimoniales, así como el apoyo de las instituciones y de los empresarios han sido decisivos. Por ello, este sector se ha convertido en el motor de la economía del Archipiélago.

  5. En la población Canaria, la función de Framingham estima mejor el riesgo de mortalidad cardiovascular que la función SCORE Framingham function estimates the risk of cardio vascular mortality more effectively than SCORE function in the population of the Canary Islands (Spain

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    Antonio Cabrera de León

    2009-06-01

    Full Text Available Objetivos: Comparar la estimación de eventos cardiovasculares fatales con las funciones de Framingham y SCORE, además de explorar su capacidad para detectar el riesgo aportado por factores no incluidos en sus ecuaciones: sedentarismo, obesidad, perímetro abdominal, razón abdomen/estatura, razón abdomen/pelvis y consumo excesivo de alcohol. Métodos: Estudio transversal de 5.289 personas, de 30 a 69 años de edad, obtenidas por muestreo aleatorio en la población general de Canarias. Se calibraron las funciones de Framingham y SCORE, y se estimó su concordancia. Se obtuvo, para estas edades, la tasa poblacional de mortalidad cardiovascular y se confrontó con el riesgo predicho por las funciones. Resultados: En los hombres, la tasa de mortalidad por 100.000 habitantes fue de 67,4, en tanto que la estimación de Framingham, SCORE-Low y SCORE-High fue de 80, 140 y 270, respectivamente. En las mujeres, frente a una tasa de 19,3, la estimación fue de 30, 50 y 70, respectivamente. Ambas funciones detectaron el incremento del riesgo aportado por los factores estudiados, con la excepción, en las mujeres, del sedentarismo con SCORE y del consumo excesivo de alcohol con ambas funciones. En los hombres, tomando para Framingham los puntos de corte de >12%, >15% y >20%, la concordancia con SCORE-Low produjo una Kappa de 0,6, 0,7 y 0,5, respectivamente. Conclusiones: La función de Framingham estimó mejor las tasas de mortalidad que la función SCORE. Únicamente la función de Framingham detectó en ambos sexos el riesgo cardiovascular aportado por el sedentarismo. En Canarias recomendamos la aplicación de la función de Framingham calibrada.Introduction: To compare the performance of the Framingham and SCORE functions to estimate fatal cardiovascular events. In addition, we explored the ability of both functions to detect the risk contributed by factors not included in their equations: sedentariness, obesity, abdominal circumference, abdomen

  6. Influencia de la pérdida foliar sobre la cosecha en el cv. Gruesa, Musa acuminata Colla (AAA, cultivado bajo invernadero en las Islas Canarias Influence of leaf removal in yield of cv. Gruesa, Musa acuminata Colla (AAA, cultivated under greenhouse in the Canary Islands

    Directory of Open Access Journals (Sweden)

    Juan Cabrera Cabrera

    2010-12-01

    Full Text Available El cultivo de la variedad de platanera Gruesa, selección local de Dwarf Cavendish, ha experimentado un importante aumento en los últimos años en las Islas Canarias, tanto al aire libre como bajo invernadero. La eliminación de hojas, tras la floración, es una práctica habitual en los cultivos bajo invernadero. Asimismo es frecuente la pérdida de hojas por el efecto de los vientos en los cultivos al aire libre. El objetivo de este trabajo es evaluar, mediante simulación de pérdida foliar por daños mecánicos, la influencia que tiene la disminución de superficie foliar sobre el llenado y cosecha de la fruta en dicho cultivar. Para ello, cuatro meses antes de la cosecha se efectuaron cinco niveles de defoliación: 0%, 25%, 50%, 75% y 100%. Se valoran dos métodos diferentes de defoliación, eliminación de limbo foliar y tronchado de hojas con posterior corte de éstas. Se analizan y presentan datos morfológicos, fenológicos y productivos, así como valoración de la metodología empleada en este trabajo para la simulación de daños. A partir de un 25% de defoliado, equivalente a 7.5 hojas funcionales por planta, se detectaron diferencias significativas con las plantas testigos.The banana cultivar Gruesa, a local Dwarf Cavendish selection, is increasingly planted in the Canary Islands, both in greenhouse and in the open air. Both methods present some degree of leaf loss throughout the crop cycle: the leaves of greenhouse plants are traditionally cut back after flowering, and open air plantations experience frequent wind damage. A trial was set up four months prior to harvest to evaluate fruit filling rate and yield of Gruesa subjected to five levels of defoliation (0%, 25%, 50%, 75%, and 100% loss of leaf area. Two defoliation techniques were used to simulate damage: removal of the midrib, and slashing the leaf blade followed later by complete removal. Morphological, phenological and production data are presented.

  7. Radon in Groundwater of the Northeastern Gran Canaria Aquifer

    OpenAIRE

    Héctor Alonso; Tatiana Cruz-Fuentes; Jesús G. Rubiano; Jonay González-Guerra; María del Carmen Cabrera; Miguel A. Arnedo; Alicia Tejera; Alejandro Rodríguez-Gonzalez; Francisco J. Pérez-Torrado; Pablo Martel

    2015-01-01

    222Rn has been detected in 28 groundwater samples from the northeast of Gran Canaria (Canary Islands, Spain) utilizing a closed loop system consisting of an AlphaGUARD monitor that measures radon activity concentration in the air by means of an ionization chamber, and an AquaKIT set that transfers dissolved radon in the water samples to the air within the circuit. Radon concentration in the water samples studied varies between 0.3 and 76.9 Bq/L. Spanish radiological protection regulations lim...

  8. Evolución de la mortalidad y de los años de vida perdidos prematuramente relacionados con el consumo de alcohol en las Islas Canarias (1980-1998 Trends in mortality and years of life lost related to alcohol in the Canary Islands, Spain (1980-1998

    Directory of Open Access Journals (Sweden)

    L.M. Bello

    2003-12-01

    óvenes.Objective: The aim of this article was to describe death rates and years of life lost prematurely (YLLP in relation to alcohol consumption in the Canary Islands. The study covered the period between 1980 and 1998. Methods: Deaths from 1980 to 1998 were classified by age, sex, and cause using data obtained from the National Institute of Statistics (Natural Changes in the Population. The number of alcohol-related deaths was calculated by year, sex, and age group using the attributable population fraction as proposed by the Centers for Disease Control (USA. The YLLP attributed to alcohol consumption were calculated for each cause of death by multiplying deaths by the attributable population fraction in 5-yearly age groups for both sexes (average span of five years, up to the age of 65 years. Results: Between 1980 and 1998, the number of alcohol-related deaths was 12,614, averaging 6.4% per year and with a male-to-female ratio of approximately 2:1. The main causes of death and YLLP in both men and women were malignant neoplasms, diseases of the digestive system, and alcohol-related accidents, although accidents were by far the main cause producing 50.6% of alcohol-related YLLP in men and 55.5% in women. Over the study period, the incidence of cirrhosis of the liver and that of other chronic liver diseases (CIE 571 decreased in men whilst remaining stable in women. Conclusions: The finding that the percentage of alcohol-related deaths and cirrhosis of the liver remained high in the Islas Canarias between 1980 and 1998 highlights the need for educational strategies on the effects of alcohol, together with policies designed to reduce its consumption, particularly among the young.

  9. Spatial Tourist and Functional Diversity on the Volcanic Island of Gran Canaria

    Science.gov (United States)

    Gonda-Soroczyńska, Eleonora; Olczyk, Hanna

    2017-10-01

    The conducted research is focused on spatial, functional and landscape diversity, the existing tourist potential and the possibilities for further development of a small, volcanic island of Gran Canaria. The discussed island was compared against other islands of the Canarian archipelago (Lanzarote, Fuerteventura, Tenerife, La Palma, El Hierro). Similarly to the remaining Canary Islands, the economy of Gran Canaria is predominantly based on tourism (approx. 4,5-5,0 million tourists visit the Canary Island annually and approx. 2,8 million come to Gran Canaria). Additionally, Puerto de la Luz transhipment centre in Las Palmas plays a very important role because of the goods imported from overseas. It is one of the largest ports in Spain (it reloads almost 2 million containers per year) also being an important Atlantic refuelling station. Apart from tourism, an important role is played here by agriculture, primarily the cultivation of bananas and tomatoes, which represent the most significant export good of the archipelago. The conducted spatial research showed an extensive diversity. This situation is, to a great extent, influenced by the climate. The northern part is cooler and dominated by agriculture, whereas the southern one is much warmer and characterized by a well-developed tourism infrastructure. Site inspections performed out along the outer contour of the island resembling a circle. Numerous architectural and urban sketches, urban analyses and photographic documentation were made. Community surveys were carried out. For a researcher, it was extremely interesting to answer the questions whether Gran Canaria is different from the other Canary Islands, especially in the functional and landscape context, and if so what exactly these differences consist of. What is Gran Canaria in particular characterized by and what kind of role it plays in the economic sector of Spain?

  10. The canary tree

    OpenAIRE

    Mekler, Alan H.; Shelah, Saharon

    1993-01-01

    A canary tree is a tree of cardinality the continuum which has no uncountable branch, but gains a branch whenever a stationary set is destroyed (without adding reals). Canary trees are important in infinitary model theory. The existence of a canary tree is independent of ZFC + GCH.

  11. El oficio de los neveros en Gran Canaria en el siglo XVIII

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    Salvador Miranda Calderin

    2013-11-01

    Full Text Available A finales del s. XVII el Cabildo Catedral de Canarias, con sede en la capital de Gran Canaria, construyó en la cumbre de la Isla dos pozos de nieve. Allí la recogían y conservaban hasta que era transportada en verano a la ciudad. Las libras de nieve se vendieron en la «nevería» ubicada en la trasera de la Catedral desde 1694 hasta 1866. En este artículo estudiamos el oficio de nevero en Gran Canaria, que había sido olvidado por completo, sus salarios, alimentación y especialidades en el s. XVIII.At the end of XVIIIth century the Canary Cathedral Chapter, settled in Gran Canaria Island capital, built, up in the mountains, two snow wells. Workers collected the snow and filled the wells until it was transported, in summer time, from the top of the island (1.949 meters to the city. Snow pounds were sold in the back of the Cathedral from 1694 to 1866. In this article we study the «neveros» job (snow workers in Gran Canaria, that it had been completely forgotten nowdays, their salaries, food and specialities in XVIIIth century.

  12. El Mato Azul (Maireana brevifolia (R.Br. P.G. Wilson, una chenopodiácea australiana establecida recientemente en Gran Canaria. Islas Canarias

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    Carlos Suárez Rodríguez

    2013-10-01

    Full Text Available Se confirma la expansión corológica del xenófito, Maireana brevifolia (R.Br. P.G. Wilson, especie invasora de reciente introducción en Gran Canaria comentándose su ecología y la amenaza que implica para las comunidades vegetales de los espacios naturales protegidos en la isla.We report the corological expantion of xenofitic plant Maireana brevifolia (R.Br. P.G. Wilson in Grand Canary, Canary Islands; also we comments his dispertion ecological factors and his potential danger for the protected areas of the island.

  13. The Miner's Canary

    Science.gov (United States)

    Guinier, Lani

    2005-01-01

    Miners used canaries as early warning signals: when a canary gasped for breath, the miners knew there was a problem with the atmosphere in the mine. The experience of people of color in higher education can be used similarly as a diagnostic tool.

  14. La emigración canaria a Cuba en la primera mitad del siglo XIX

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    Manuel HERNÁNDEZ GONZÁLEZ

    2010-02-01

    Full Text Available RESUMEN: Los profundos cambios que afectaron a la economía y la sociedad cubana desde finales del siglo XVIII tuvieron una repercusión directa en los flujos migratorios que desde la metrópoli llegaban a la Perla de las Antillas como punto de destino. En ese marco se inscribe una notable emigración canaria que responde y es síntoma de la crisis económica que vive Canarias en esa época. El presente artículo analiza las características principales de esa emigración así como los factores internos y externos que la condicionan a lo largo de la primera mitad del siglo XIX y que suponen algunas notas diferenciadoras con relación a la emigración de los peninsulares. Palabras Clave: Cuba, Canarias, Siglo XIX, Emigración, Economía. ABSTRACT: The profound changes that affected Cuban economy and society as from the end of the 18th century had direct repercussions on the emigration from the metropolis to the "Pearl of the Antilles". Inscribed within tthis framework is the considerable emigration from the Canary Islands as a response to and symptom of the economic crisis experienced in the Canary Islands at that time. This article analyzes the main characteristics of that emigration as well as the internal and external factors that conditioned it throughout the first half of the 19th century and which entail some points which differentiate it from peninsular emigration. Key words: Cuba, Canary Islands, 19th Century, Emigration, Economy.

  15. Aceleración hormonal en la adquisición del canto en canarios juveniles (Serinus canaria)

    OpenAIRE

    Alliende González, Jorge Andrés

    2009-01-01

    En las aves canoras, la ontogenia del canto presenta un paralelismo con la adquisición del habla en humanos. Al igual que los humanos, el desarrollo de este comportamiento requiere en primera instancia la exposición a las vocalizaciones típicas de la especie. Luego se necesita un período sensorial motor en el que se practica el canto luego de cual la vocalización se produce de manera estereotipada. Esta última requiere el domino de las instrucciones motoras que gobiernan el aparato vocal y al...

  16. The reuse of regenerated water for irrigation of a golf course: evolution geochemistry and probable affection to a volcanic aquifer (Canary Islands); La reutilizacion de aguas regeneradas para riego de un campo de golf: evolucion geoquimica y probable afeccion a un acuifero volconico (Islas Canarias)

    Energy Technology Data Exchange (ETDEWEB)

    Cabrera, M. C.; Palacios, M. P.; Estevez, E.; Cruz, T.; Hernandez-Moreno, J. M.; Fernandez-Vera, J. R.

    2009-07-01

    Irrigation reuse of treated urban wastewater presents unquestionable advantages, but recently some possible unfavourable effects that need to be studied in the long term have been detected. The Bandama golf course, located at the NE of Gran Canaria, has been selected to develop an integrated study of the affection on a medium-long term, due to it has been irrigated with reused water for more than 30 years. The characterization of irrigation water, soil, soil lixiviate and aquifer functioning has allowed to obtain preliminary conclusions pointing to the importance of the soil nature, the precipitation, the irrigation management and the hydrogeologic conditions in the soil and aquifer response, In the study area, this is complicated for the existence of about 250 m thick unsaturated zone conformed by volcanic materials where water must flow through fractures, making impossible to be sampled. (Author) 7 refs.

  17. Analysis of individual- and time-specific covariate effects on survival of Serinus serinus in north-eastern Spain

    Science.gov (United States)

    Conroy, M.J.; Senar, J.C.; Domenech, J.

    2002-01-01

    We developed models for the analysis of recapture data for 2678 serins (Serinus serinus) ringed in north-eastern Spain since 1985. We investigated several time- and individual-specific factors as potential predictors of overall mortality and dispersal patterns, and of gender and age differences in these patterns. Time-specific covariates included minimum daily temperature, days below freezing, and abundance of a strong competitor, siskins (Carduelis spinus) during winter, and maximum temperature and rainfall during summer. Individual covariates included body mass (i.e. body condition), and wing length (i.e. flying ability), and interactions between body mass and environmental factors. We found little support of a predictive relationship between environmental factors and survival, but good evidence of relationships between body mass and survival, especially for juveniles. Juvenile survival appears to vary in a curvilinear manner with increasing mass, suggesting that there may exist an optimal mass beyond which increases are detrimental. The mass-survival relationship does seem to be influenced by at least one environmental factor, namely the abundance of wintering siskins. When siskins are abundant, increases in body mass appear to relate strongly to increasing survival. When siskin numbers are average or low the relationship is largely reversed, suggesting that the presence of strong competition mitigates the otherwise largely negative aspects of greater body mass. Wing length in juveniles also appears to be related positively to survival, perhaps largely due to the influence of a few unusually large juveniles with adult-like survival. Further work is needed to test these relationships, ideally under experimentation.

  18. Preferencias de hábitat, densidad y diversidad de las comunidades de aves en Tenerife (Islas Canarias

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    Carrascal, L. M.

    2005-12-01

    Full Text Available Species–specific habitat preferences, density and species richness of bird communities in Teneriffe (Canary Islands Bird distribution and abundance are described and analyzed in Teneriffe (Canary Islands. Inter–habitat differences in density, diversity and species richness are shown in table 1. Figure 2 shows the main determinants of bird species richness in Teneriffe, and tables 2 and 3 and figure 3 show the species–specific patterns of spatial variation abundance (more detailed for Anthus berthelotii, Fringilla coelebs canariensis, Fringilla teydea, Parus caeruleus teneriffae, Phylloscopus canariensis, Regulus teneriffae, Serinus canarius and Turdus merula cabrerae. Deeply transformed environments due to human impact (urban habitats, agricultural mosaics, banana plantations have high bird densities and species richness, even higher than those measured in native, unmodified habitats such as laurel forests or mature pinewoods. Urban environments in Teneriffe are very permeable to native bird fauna, as they have been occupied by many widespread endemic species/subspecies. Many of the endemic, well defined species or subspecies of island birds have high population densities within native, untransformed habitats. Density compensation and niche expansion is not a common phenomenon in the avifauna of Teneriffe. Nevertheless, all species/subspecies broadening the inter–habitat or altitudinal distribution are endemic of the Canary Islands.

  19. The diversity of phytoseiid mite communities in the Maghreb comparisons with the fauna of one of the Canary Islands.

    Science.gov (United States)

    Serge, Kreiter; Marie-Stephane, Tixier; Latifa, Allam

    2007-08-01

    Phytoseiid mite diversity was surveyed on wild and cultivated plants in Morocco and Tunisia from 1994 to 2003. Results were associated with those obtained in previous surveys conducted by other authors in Algeria and in one of the Canary Islands (Gran Canaria). They showed, 21 species are known from Tunisia (1 was known before), 53 from Algeria, 41 from Morocco (15 were known before) and 23 from the Canary Island. Eight were known from all these islands before the data published in 2003 concerning only Gran Canaria, which represent a very small area compared to the three large countries, above all to Algeria. Ten species were common to all the four countries, 4 to Morocco, Algeria and Tunisia, 1 to Algeria and Tunisia. One species was in Tunisia and Morocco, suggesting that this species might also be present in Algeria, 1 was present in Morocco, Algeria and in the Canary Island. Nine species were found in Algeria and Morocco and one species in Algeria and the Canary Island. The authors detected a new genus and a new species in Tunisia, 8 new species in Morocco, and published data mentioned 6 new species in the Canary Island. The considerations on biogeography were also given.

  20. Genes, geology and biodiversity: faunal and floral diversity on the island of Gran Canaria

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    Emerson, B. C.

    2003-01-01

    Full Text Available High levels of floral and faunal diversity in the Canary Islands have attracted much attention to the archipelago for both evolutionary and ecological study. Among the processes that have influenced the development of this diversity, the volcanic history of each individual island must have played a pivotal role. The central island of Gran Canaria has a long geological history of approximately 15 million years that was interrupted by violent volcanism between 5.5 and 3 million years ago. Volcanic activity is thought to have been so great as to have made all plant and animal life virtually extinct, with survival being limited to some coastal species. The implication from this is that the higher altitude laurel forest and pine woods environments must have been re-established following the dramatic volcanic period. This paper reviews the evidence for this using recent molecular phylogenetic data for a number of plant and animal groups on the island of Gran Canaria, and concludes that there is general support for the hypotheses that the forest environments of Gran Canaria post-date the Roque Nublo eruptive period.

  1. Molecular phylogenetics of Micromeria (Lamiaceae) in the Canary Islands, diversification and inter-island colonization patterns inferred from nuclear genes.

    Science.gov (United States)

    Puppo, Pamela; Curto, Manuel; Gusmão-Guedes, Joana; Cochofel, Jaqueline; Pérez de Paz, Pedro Luis; Bräuchler, Christian; Meimberg, Harald

    2015-08-01

    Here we reconstruct the evolutionary history of Micromeria in the Canary Islands using eight nuclear markers. Our results show two centers of diversification for Micromeria, one in the eastern islands Gran Canaria and Lanzarote, the other in the western islands, Tenerife, La Palma and El Hierro. Suggested directions of inter-island colonization are the following: Gran Canaria to Lanzarote and La Gomera; Tenerife to La Palma (from the paleoisland of Teno), to El Hierro (from the younger, central part), and to La Gomera and Madeira (from the paleoislands). Colonization of La Gomera probably occurred several times from Gran Canaria and Tenerife. The taxonomic implications of these results are discussed. Incongruence among the different markers was evaluated and, using next generation sequencing, we investigated if this incongruence is due to gene duplication. Copyright © 2015 Elsevier Inc. All rights reserved.

  2. Radon in Groundwater of the Northeastern Gran Canaria Aquifer

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    Héctor Alonso

    2015-05-01

    Full Text Available 222Rn has been detected in 28 groundwater samples from the northeast of Gran Canaria (Canary Islands, Spain utilizing a closed loop system consisting of an AlphaGUARD monitor that measures radon activity concentration in the air by means of an ionization chamber, and an AquaKIT set that transfers dissolved radon in the water samples to the air within the circuit. Radon concentration in the water samples studied varies between 0.3 and 76.9 Bq/L. Spanish radiological protection regulations limit the concentration of 222Rn for drinking water to 100 Bq/L, therefore the values obtained for all the analyzed samples are below this threshold. The hydrogeological study reveals a significant correspondence between the radon activity concentration and the material characteristics of the aquifer. For a selected group of samples with high radon concentrations, gross alpha activity has been determined to have values higher than the prescriptive screening level (0.1 Bq/L.

  3. Canarias en la historiografía regional

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    Teresa GONZÁLEZ PÉREZ

    2010-03-01

    Full Text Available RESUMEN: En España a partir de la constitución de las autonomías, se abordan los contrastes regionales de los distintos territorios que componen la monarquía, tratando de conocer diferencias geográficas, históricas, étnicas, jurídicas, económicas y culturales. Sin embargo, hay que reconocer que la evolución de la historia local y regional ha sido bastante desigual. Existe una historiografía regional consolidada en aquellas regiones en las que antiguos planteamientos nacionalistas han impulsado su desarrollo. En Canarias, el auge de la historia regional es reciente, aunque el estudio del pasado histórico arranca con Viera y Clavijo y Millares Torres, surge en el siglo XX en el seno de la investigación universitaria. ABSTRACT: After the constitution of the authonomous regions in Spain, regional contrasts of the territories that constitute the monarchy were analyzed in order to learn about historical, geographical, ethnical, economical and cultural differences. Nevertheless, the development of local and regional history has been unequal. There is a consolidated regional historiography in the regions where nationalistic positions have promoted its development. In the Canary Islands, the development of regional history is quite new and originates in the university, in spite of the fact the study of the past initiates with Viera y Clavijo and Millares Torres.

  4. Temporal evolution of the gonad index of the sea urchins Paracentrotus lividus (Echinoida: Echinidae) and Diadema africanum (Diadematoida: Diadematidae) in the Canary Islands (Spain).

    OpenAIRE

    González-Henríquez, Nieves; Rey-Méndez, Manuel; Catoira Gómez, José Luis; Ruiz de la Rosa, Manuel; Louzara Fernández, Gregorio; Girard Berard, Dominique Girard

    2016-01-01

    There are three main species of regular sea urchins in the Canary Islands. To establish the optimal fishing seasons for two of them, we studied the evolution of the gonadal index in several years and locations, of Paracentrotus lividus (April 2006 to March 2008 on Tenerife island in two locations: Las Galletas and La Jaca and from April 2006 to January 2009 in Gran Canaria island in two locations: Ojos de Garza and Gando), and Diadema africanum (January 2010 to May 2011 on Gran Canaria island...

  5. Escultismo y educación física en Canarias (1912-1920

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    Antonio S. Almeida Aguiar

    2013-10-01

    Full Text Available Uno de los movimientos juveniles que mayor repercusión ha tenido en la historia de la educación ha sido los Boy Scouts. Fundado en 1907 por el general Baden Powell, tenía como fin la mejora social de la juventud inglesa. La extensión de la asociación scout fue rápida y en todo el mundo. En España, al igual que en Canarias, fue introducida en 1912 por los militares. Entre los principales puntos de la pedagogía scout está la importancia de la educación física en el desarrollo del ser humano como parte integrante de su educación. Precisamente, la educación física y su extensión en Canarias deben mucho al escultismo. En el presente artículo trataremos de determinar los orígenes de la asociación en las islas, con especial incidencia en el consejo local de la ciudad de Las Palmas de Gran Canaria, así como la trascendencia que tuvo en la juventud la incorporación de la educación física como parte de la educación general.One of the most important youth movements in the history of education has been the Boy Scouts. Founded in 1907 by General Baden Powell, whose aim was to improve the social conditions of the English youth. The wide- ranging scope of the scout’s association developed rapidly across the globe. In Spain, as in the Canary Islands, it was started in 1912 by the military. Its main educational functions include physical education in developing the personal growth of human beings as an integral part of their overall education. Indeed, physical education and its development in the Canary Islands owe much to the scout movement. In the present paper we will explore the origins of the association in the islands, with emphasis on the local council in Las Palmas de Gran Canaria.

  6. Mapping natural radioactivity of soils in the eastern Canary Islands.

    Science.gov (United States)

    Arnedo, M A; Rubiano, J G; Alonso, H; Tejera, A; González, A; González, J; Gil, J M; Rodríguez, R; Martel, P; Bolivar, J P

    2017-01-01

    The Canary Islands archipielago (Spain) comprises seven main volcanic islands and several islets that form a chain extending for around 500 km across the eastern Atlantic, between latitudes 27°N and 30°N, with its eastern edge only 100 km from the NW African coast. The administrative province of Las Palmas comprises the three eastern Canary Islands (Lanzarote, Fuerteventura and Gran Canaria). An extensive study of terrestrial gamma dose rates in surface soils has been carried out to cover the entire territory of the province (4093 km2). The average outdoor gamma dose rate in air at 1 m above ground is 73 nGyh-1 at Gran Canaria, 32 nGyh-1 at Fuerteventura, and 25 nGyh-1 at Lanzarote. To complete the radiological characterization of this volcanic area, 350 soil samples at 0-5 cm depth were collected to cover all the geologic typologies of the islands. These samples were measured using high resolution gamma spectrometry to determine the activity concentrations of 226Ra, 232Th and 40K. The average values obtained were 25.2 Bq/kg, 28.9 Bq/kg, and 384.4 Bq/kg, respectively. Maps of terrestrial gamma activity, effective dose, and activity concentrations of 226Ra, 232Th and 40K for the region have been developed through the use of geostatistical interpolation techniques. These maps are in accord with the geology of the islands. Copyright © 2016 Elsevier Ltd. All rights reserved.

  7. Desarrollo primero del diario 'Canarias 7'

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    Lic. Lucía Jiménez

    1998-01-01

    Full Text Available Cuando Informaciones Canarias (SA, Inforcasa, salió a la calle con un nuevo proyecto, lo hizo, según sus fundadores (entre ellos, un grupo de profesionales y empresarios canarios pertenecientes a sectores de la construcción, inmobiliario, pesca, industria transformadora, turismo, Caja de Canarias, etc. con una clara vocación regional y con una credibilidad suficientemente amplia como para competir con los periódicos instaurados desde hacia décadas.Sin duda, el esfuerzo realizado parece haber dado sus frutos.

  8. Megabacteriosis Occurrence in Budgerigars, Canaries and Lovebirds in Ribeirao Preto region - Sao Paulo State - Brazil Ocorrência de Megabacteriose em Periquitos Autralianos, Canários e Agapornis na Região de Ribeirão Preto- Estado de São Paulo - Brasil

    Directory of Open Access Journals (Sweden)

    K Werther

    2000-08-01

    Full Text Available This paper reports the occurrence of an megabacterium-like organism at small birds from the Northeast area of São Paulo State - Brazil. The results presented herein were obtained from 64 necropsy along four years (1994-1997. Sixty four birds (4 budgerigars Melopsittacus undulatus, 12 lovebirds Agapornis spp and 48 canaries Serinus canaria were studied. At 56% of the examined birds showed at the proventricular mucus smear a presence of rod-shaped (similar to a toothpick organisms, Gram positive and acidophilic in Giemsa staining, called megabacteria. Different kind of culture media was testes to replicated these organism in vitro. Also the dimension (large and width of the fresh microorganism from the proventricular mucus and from the first culture was compared. The macroscopic alterations observed at the necropsies was also listed.Este trabalho tem como objetivo relatar a ocorrência de um agente etiológico, denominado na Europa, Australia e EUA como "megabactéria", observado em estômago de pequenas aves (canários belgas, agapornis e periquitos australianos, provenientes da região de Ribeirão Preto, Estado de São Paulo/SP. As necropsias de 64 aves silvestres (4 periquitos australianos, 12 agapornis e 48 canários, realizadas no perído de 1994 a 1997, foram analisadas, constatando-se em 56% dos casos a presença de estruturas filiformes, acidofílicas sob coloração Giemsa, gram positivas, existentes no muco do proventrículo, descritas na literatura como "megabactérias". Foram testados diversos tipos de meios de cultura para reprodução in vitro deste microrganismo. Foram ainda comparadas as dimensões (comprimento e largura dessa bactéria obtida apartir do esfregaço fresco de muco proventricular e da "megabactéria" proveniente de cultivo in vitro. Também foram listados os principais achados macroscópicos do animais portadores desta bactéria.

  9. Fiestas reales en el setecientos en Canarias : identidades, evolución y peculiaridades

    Directory of Open Access Journals (Sweden)

    Antonio de Béthencourt Massieu

    1997-01-01

    Full Text Available Análisis comparativo de las relaciones festivas por el nacimiento del Principe Luis (1707 y proclamación de Carlos III (1760 de los tiistoriadores Pedro Agustín del Castillo y José Viera y Clavija. Del mismo se derivan identidad entre las celebradas en Canarias y en la Península, evolución coyuntural a lo largo del Setecientos y las muchas peculiaridades de las insulares.A comparative analysis of two accounts on the festivals held to commemorate Prince Luis' birth (1707 and Charles lll's proclamation (1760, written by Pedro Agustín del Castillo and José Viera y Clavijo. It permits to grasp the identity of the festivals that took place in the Canary Islands and in continental Spain, the evolution along the eighteenth century and the many singular features in those held in the Islands.

  10. Reconstructing Holocene vegetation on the island of Gran Canaria before and after human colonization

    DEFF Research Database (Denmark)

    de Nascimento, Lea; Nogué, Sandra; Criado, Constantino

    2016-01-01

    We provide the first fossil pollen and charcoal analysis from the island of Gran Canaria (Canary Islands). The pollen record obtained from Laguna de Valleseco (870 m a.s.l.) spans the late Holocene (c. 4500–1500 cal. yr BP) and thereby captures the impact of human colonization. During the earliest......, 400 years before the earliest archaeological evidence of human presence in the island (c. 1900 cal. yr BP). Our data show an increased frequency of fires at that time, coinciding with the decline of palms and the increase of grasses, indicating that humans were present and were transforming vegetation......, thus showing that the demise of Gran Canaria’s forest began at an early point in the prehistoric occupation of the island. In the following centuries, there were no signs of forest recovery. Pollen from cultivated cereals became significant, implying the introduction of agriculture in the site, by 1800...

  11. Análisis de costes y ahorros potenciales relacionados con la utilización de pruebas preoperatorias en los hospitales de Canarias Cost analysis and potential savings related to the use of preoperative tests in the hospitals of the Canary Islands [Spain

    Directory of Open Access Journals (Sweden)

    J. López-Bastida

    2003-04-01

    mejor selección y utilización de las pruebas preoperatorias.Objective: To estimate the potential cost savings that might take place in the Canary Islands Health Service (CHS through the appropriate scientific use of preoperative tests, using information obtained from five public university hospitals. Methods: A questionnaire was completed by 55 anesthesiologists, representing 60% of the total in the CHS. The questionnaire paid special attention to the most frequently used preoperative tests: chest radiograph, electrocardiogram, laboratory tests, and spirometry. The mean unit costs for the various preoperative tests were obtained from the two hospitals participating in the study. To calculate the potential cost savings derived from the appropriate use of preoperative tests, several scenarios were considered. These were characterized by different hypotheses or degrees of fulfillment of a protocol based on scientific knowledge and considered as the gold standard. Results: In the ideal scenario in which the recommended scientific protocol was fulfilled in 100% of the 16 179 patients with an American Society of Anesthesiologists (ASA grade of I-II, the economic impact would be notable, since it would free sensitive resources that could be used for other health programs. These figures could amount to approximately 1.02 million euros, without considering the cost of preoperative hospital stay. This figure could increase by up to approximately 2.13 million euros if one day of preoperative hospital stay were included and by up to 3.24 million euros if two days of preoperative hospital stay were included. Conclusions: The recent literature review and the results of the questionnaire applied in the CHS indicate that preoperative tests are of greatest benefit to patients and to society if their use is guided by scientific knowledge. In addition, resources can be freed by better selection and utilization of preoperative tests.

  12. A survey of the Rubus species (Rosaceae described from the Canary Islands

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    Matzke-Hajek, Günter

    1999-06-01

    Full Text Available Taxonomy, nomenclatura and distribution of the bramble species (Rubus L., subgen. Rubus described from the Canary Islands are studied. Apart from the widespread Mediterranean R. ulmifolius Schott two species occur: R. bollei Focke (Syn.: R. canariensis Focke, R. suspiciosus Menezes and R. palmensis A. Hansen. The latter is not an endemic of La Palma as assumed by its discoverer, but is recorded for the first time also in Gran Canaria and Tenerife. Complete descriptions are provided, and illustrations of distinctive features often lacking in herbarium specimens are presented. Problems concerning the typification are discussed. Rubus x wolfredoi-wildpretii H. E. Weber nothospec. nov., the frequent hybrid between Rubus bollei and R. ulmifolius is described as new to science. Rubus bornmuelleri Focke from Gran Canaria is based on a specimen dubium and has to be deleted from the list of Canarían species.Se han estudiado la taxonomía, la nomenclatura y la distribución de las especies de zarzas (Rubus L., subgen. Rubus descritas de las Islas Canarias. Junto a Rubus ulmifolius Schott, especie muy frecuente en el Mediterráneo, se encontraron dos especies: R. bollei Focke (Syn.: R. canariensis Focke, R. suspiciosus Menezes y R. palmensis A. Hansen. Se incluyen descripciones completas e ilustraciones de algunas características relevantes y que no siempre se han observado en especímenes de herbario revisados. Además, se discuten problemas de tipificación y se describe como nuevo para la ciencia Rubus x wolfredoi-wildpretii H.E. Weber nothospec. nov., híbrido frecuente entre R. bollei y R. ulmifolius. R. bornmuelleri Focke de Gran Canaria debe ser excluido de la lista de las especies canarias, al estar basada su descripción en un specimen dubium.

  13. La defensa de Canarias contra asaltos aerotransportados en 1943

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    Juan José Díaz Benítez

    2013-10-01

    Full Text Available La tradicional indefensión naval de Canarias se vio agravada durante la II Guerra Mundial, cuando la ambiciosa política exterior española la expuso a un ataque aliado, al cual se intentó responder aprovechando de la mejor manera posible los escasos recursos disponibles. El plan de defensa contra ataques aerotransportados, redactado a finales de 1943, formó parte de este infructuoso esfuerzo, en un momento en el que ya no se cernía ninguna amenaza sobre el archipiélago. Pese al interés mostrado en esta nueva táctica, la frustrante realidad de unas fuerzas armadas mal equipadas y afectadas por un grave atraso tecnológico impidió que fuera llevado a la práctica, reforzando así la conciencia de la vulnerabilidad de las islas.Throughout History, the Canaries have been undefended against naval aggressions, because of the lack of enough defensive forces. This situation was really serious at World War II, when the foreign policy of the Spanish Government put them at the pike of an Allied seizure. The Spanish Command tried to make the best use of the ill equipped garrison, studying the best way to resist an aggression, such as the planning on defensive measures against airborne assaults at the end of 1943. However, the interest in the new tactics developed through the war could not offset itself the need of modern weapons and equipment, reinforcing only the feeling of defenceless.

  14. Marine Conglomerates of Agaete, Gran Canaria: A Tsunami Origin?

    Science.gov (United States)

    Austin-Giddings, W. D.; Tappin, D. R.; McGuire, W. J.; Day, S. J.

    2007-12-01

    Of all the deposits interpreted as having been emplaced by a tsunami, those draping hillslopes at high elevations on ocean island volcanoes have been most controversial. Here, we describe such a deposit from the Canary Islands, whose minimal post-emergence subsidence or uplift makes interpretation of the deposits less difficult than in other examples. We present a preliminary interpretation of marine sediments located at Agaete, on the north-east coast of Gran Canaria. Previously interpreted as the result of a sea level high-stand, these have recently been re-interpreted as having been deposited by a volcanically-sourced tsunami. Our re-examination indicates that of the alternatives, a tsunami origin is the more likely. The deposit occurs in exposures of limited lateral extent, attached to the walls of the Agaete valley, and may be traced up to elevations of 188m a.s.l. and two kilometres inland from the coast. The deposits are up to 2m in thickness and contain a diverse assemblage of volcanic clasts, a marine fauna and large beach-rock boulders. Two sedimentary units are identified, separated by a calichified soil horizon. Analysis of microfossils has yielded a variety of marine organisms including gastropods, bivalves, sharks teeth, echinoid spines and foraminifera. The evidence supports a tsunami origin for a number of the beds, whereas others may be attributed to flash floods. Dating of the deposits has not yet been undertaken, but the Güimar lateral collapse on the neighbouring island of Tenerife (age range between 32 Ka and 1.75 Ma) has been cited as a possible source.

  15. Archaeology in the Canary Islands during the Franco regime: the original settlement of the Islands as paradigm (1939-1969

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    Farrujia de la Rosa, A. José

    2004-06-01

    Full Text Available In the present article, we analyze the contributions of the authors linked to the Provincial Commissary for Archaeological Excavations in the Canaries. Their studies led to the development of a nationalist prehistory of these islands. Developed during Franco’s regime, this prehistory was directly influenced by the theoretical, practical and ideological guidelines that gave meaning to the studies of peninsular prehistory at this time. An approach to the topic of the original colonization of the Canary Islands, allows us to highlight the relationship that existed between politics and archaeology, and therefore, between the power and the generation of the scientific knowledge.

    Durante el franquismo, la aportación de los distintos autores vinculados con las Comisarías Provinciales de Excavaciones Arqueológicas de Canarias daría pie al desarrollo de una lectura nacionalista de la prehistoria canaria, directamente influenciada por las directrices teóricas, prácticas e ideológicas que por entonces daban sentido a la prehistoria peninsular. Una aproximación al estudio del primitivo poblamiento de las Islas Canarias durante este período nos ha permitido sacar a relucir la estrecha relación que existió entre la política y la arqueología y, por ende, entre el poder y la generación del conocimiento científico.

  16. Labile carbon pools and biological activity in volcanic soils of the Canary Islands Fracciones de carbono orgánico lábil y actividad biológica en suelos de origen volcánico de las Islas Canarias Frações de carbono orgânico lábil e actividade biológica em solos de origem vulcânica das Ilhas Canárias

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    Cecilia María Armas Herrera

    2013-03-01

    Full Text Available It is important to assess the mineralisation of soil organic carbon (SOC to predict the short-term response of biosphere carbon reservoirs to changing environmental conditions. We investigated the labile (easily-mineralisable SOC in volcanic soils, where the bioavailability of SOC is typically affected by physico-chemical stabilisation mechanisms that are characteristic of these soils. Ten soils were selected that represent the most typical soil types (mainly Andosols and natural habitats (xerophytic scrubland, laurel forest and pine forest in the Canary Islands, a volcanic archipelago. Over two years we measured several physico-chemical SOC fractions with different degrees of bioavailability: water-soluble carbon in fresh soil samples (WSC and in the saturated extract (WSCse, hot water-extractable carbon (HWC, potassium sulphate-extractable carbon (PSC, microbial biomass carbon (MBC, particulate organic carbon (POC, humic substances carbon (HSC, and total organic carbon (TOC, and performed CO2 emission incubation assays. We related these measurements to the potential C inputs of plant litter and roots and to the activity of certain hydrolytic enzymes (CM-cellulase, ?-D-glucosidase, and dehydrogenase that are involved in carbon turnover. In vitro carbon mineralisation measurements from short assays (ten days were fitted with simple first-order kinetics to investigate SOC. This procedure was simple and allowed us to obtain estimates both for potentially mineralisable SOC and for the heterogeneity of the substrates that were consumed during incubation. The investigated volcanic soils had large labile SOC concentrations in which simple carbohydrates predominated and that were mainly derived from roots and aboveground non-woody residues. Among the analysed physico-chemical SOC fractions, HWC (3.1 g kg-1 on average at 0-30 cm depth in Andosols was the most correlated with C0 (1.2 g kg-1 and therefore best represents potentially mineralisable SOC. PSC

  17. Canarias: entre el desarrollo turístico y la protección al medio

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    Tanausú Perez Garcia

    2010-11-01

    Full Text Available Les îles Canaries, situées dans la région  de la ‘Macaronésica’ (l’Est de l’Océan Atlantique, abritent des écosystèmes marins et terrestres très précieux, tant du point de vue écologique que paysager. Ils sont représentatifs de les zones biogéographiques de sa région et comptent trois Réserves da Biosphère reconnues par l’UNESCO. De grands scientifiques comme Alexander Von Humboldt et Charles Darwin ont fait l’éloge de la richesse de la biodiversité de cet archipel. Cependant, actuellement, la pression anthropique, notamment en liaison avec le développement touristique et tous les enjeux économiques qui l’accompagnent, mettent en danger les écosystèmes des Canaries ; ce constat a ouvert un large débat sur les enjeux autour des développements économique et touristiques et leurs dérives. Notre article propose de mettre l’accent sur les  caractéristiques des îles Canaries  et de replacer les processus de développements touristiques dans leur contexte pour ouvrir la réflexion sur les conditions nécessaires pour d’un développement durable.The Canary Islands, located in the region of 'Macaronésica' (Este of Atlantic Ocean, are home to marine and terrestrial ecosystems very valuable, both ecological and landscape. They are representative of the bio-geographic zones of the region and there are three Biosphere Reserves da recognized by UNESCO. Great scientists such as Alexander Von Humboldt and Charles Darwin have praised the richness of the biodiversity of this archipelago. However, at present, anthropogenic pressure, including in relation to tourism development and all economic issues that accompany it, endanger ecosystems Canary Islands. This has opened a broad debate on the issues surrounding economic development and tourism and their excesses. Our article proposes to focus on the characteristics of the Canary Islands and put the process of tourist developments in their context to open reflection

  18. Many missing rings in old Canary pines can be related with age, fires and traditional uses

    Energy Technology Data Exchange (ETDEWEB)

    Génova, M.; Santana, C.; Martínez, B.

    2017-11-01

    Aim and area of study: In the present paper we estimated the age of four monumental Pinus canariensis of Gran Canaria (Canary Islands, Spain) by means of tree-ring analysis. Many tree-ring series have been accurately studied and many missing rings have been determined. Material and methods: The trees were dead and the samples analysed were big disks. We measured numerous radii and crossdated the individual tree-ring series, paying particular attention to the existence and location of missing rings. We have distinguished between missing outer rings (MORs) and missing inner rings (MIRs) and analysed the possible causes of both. Main results: We determined an average of 8.8% total missing rings (MRs) for these long-lived trees, with a maximum of 96 MRs in a series of over 500. We have tried to establish a tree-ring chronology on Gran Canaria Island, also having the tree-ring series from Inagua site, but the long individual tree-ring series analysed do not crossdate between them. Research highlights: We consider the Canary pine a species hard to conducting dendroecological studies, especially if the samples come from managed old trees, in which a large amount of known and potentially unknown missing rings can hampered dating. Even knowing the difficulties involved in dendrochronological analyses of P. canariensis, we can confirm that it is a long-lived species, which can grow to over 500 years, and some of whose growth changes could be associated with certain historical and ecological events.

  19. Survey of diseases caused by Fusarium spp. on palm trees in the Canary Islands

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    Julio Hernández-Hernández

    2010-05-01

    Full Text Available Between 2006 and 2007, palm trees growing in both gardens and public parks and natural palm groves in the Canary Islands (Spain, and showing symptoms of wilt and dieback, were surveyed. Isolates were recovered from affected tissues of the crowns, leaves and vascular fragments on potato dextrose agar (PDA. After incubation, the Fusarium spp. colonies recovered were single-spored. They were transferred to PDA and Spezieller Nahrstoffarmer Agar (SNA for morphological identification. Identification of Fusarium oxysporum f. sp. Canariensis was confirmed by PCR with the specific primers HK66 and HK67, which amplified a fragment of 567 bp. Fusarium wilt caused by F. oxysporum f. sp. canariensis was found on 54 Phoenix canariensis trees growing on four islands: Gran Canaria, Fuerteventura, La Palma and Tenerife. F. proliferatum occurred on fifteen palms (10 P. canariensis, 1 P. dactylifera, 3 Roystonea regia and 1 Veitchia joannis located in Gran Canaria, Fuerteventura and Tenerife. Both these Fusarium species were found only in diseased palms from gardens and public parks, but not in natural palm groves. The results show that Fusarium wilt of P. canariensis is common in the Canary Islands and for the first time report F. proliferatum affecting different palm species in those islands.

  20. El ataque de Van der Does: piedra de toque para una transformación económica de Gran Canaria

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    Germán Santana Pérez

    2013-11-01

    Full Text Available A finales del siglo XVI las Islas Canarias vivieron una transformación rcon6mica. La importancia de la caña de azúcar había sido constante a lo largo de todo el siglo XVI. No obstante, su peso había disminuido a filiales de esa centuria y entró claramente en crisis desde principios del siglo XVII. Esta transformación no se vivió por igual en todas las Islas, ya que en Tenerife esta se tradujo en una época de esplendor, mientras que en Gran Canaria fue lo contrario, entrando en una fase de estancamiento. Además, las islas se vieron afectadas por epidemias, sequías y ataques corsarios en el cambio de centuria. En este ambiente sobrevino el ataque de Van der Does a Las Palmas en 1599, lo que acentuó la transformación económica.The Canary Island had an economic transformation at the end of the sixteenth century. The importance of sugar cane was constant throught the sixteenth century. However it was decreasing since the end of sixteenth century and it was short at start of seventeenth century. We can see like that seventeenth century is good for the economy in Tenerife, but in Gran Canaria is the opposite. This was so because there was change in the Canary production. So, the most important was the change in the vine and the cereal, in opposite to the sugar cane. The Canary Islands was affected by plagues, droughts and pirates too. So, the Van der Does's attack, in 1599, increased the economic  transformation.

  1. The ichthyoplankton assemblage of the Canaries-African Coastal Transition Zone: A review

    Science.gov (United States)

    Rodriguez, J. M.; Moyano, M.; Hernandez-Leon, S.

    2009-12-01

    In this paper we review information on the ichthyoplankton assemblage of the Canaries-African Coastal Transition Zone (C-ACTZ). This CTZ shows the singularity that the Canary Archipelago interrupts the main flow of the Canary Current and Trade Winds, introducing large mesoscale variability, in the form of island warm wakes and cyclonic and anticyclonic eddies downstream of the islands. Besides, upwelling filaments stretch towards the archipelago from the African coastal upwelling, transporting phytoplankton, zooplankton and fish larvae. They also interact with eddies shed from the islands to exchange water properties and biogenic material. All these mesoscale features influence the composition, structure, abundance and distribution of the larval fish community (LFC) of the region. The Canary Current (CC) and eddies shed from the islands drag larvae of island neritic fish species into the oceanic region and contribute, along warm wakes, to the horizontal distribution of fish larvae. Upwelling and upwelling filaments transport larvae of African neritic species into the oceanic region. These larvae dominate the LFC and account for the relatively high average larval fish abundance found in the C-ACTZ during the summer upwelling season. Filaments originated in the region of Cape Juby-Cape Bojador are entrained around a quasi-permanent cyclonic eddy, trapped between Gran Canaria Island and the African coast, forming a system through which most of the African neritic larvae may return to the African shelf. However, some larvae reach the eastern islands of the Canary archipelago and they may be spread all over the neritic region of the archipelago by eddies shed from the islands. Also in summer, the distribution of the LFC of the C-ACTZ is vertically stratified and fish larvae seem to carry out little or not diel vertical migration. Overall, this study highlights the strong relationship between mesoscale oceanographic processes and the LFC in the C-ACTZ.

  2. The Limacidae of the Canary Islands

    NARCIS (Netherlands)

    Regteren Altena, van C.O.

    1950-01-01

    CONTENTS Introduction............... 3 Systematic survey of the Limacidae of the central and western Canary Islands 5 Biogeographical notes on the Limacidae of the Canary Islands . . . . 21 Alphabetical list of the persons who collected or observed Limacidae in the Canary Islands.............. 31

  3. Colonization and diversification of the Euphorbia species (sect. Aphyllis subsect. Macaronesicae) on the Canary Islands.

    Science.gov (United States)

    Sun, Ye; Li, Yanshu; Vargas-Mendoza, Carlos Fabián; Wang, Faguo; Xing, Fuwu

    2016-09-29

    Diversification between islands and ecological radiation within islands are postulated to have occurred in the Euphorbia species (sect. Aphyllis subsect. Macaronesicae) on the Canary Islands. In this study, the biogeographical pattern of 11 species of subsect. Macaronesicae and the genetic differentiation among five species were investigated to distinguish the potential mode and mechanism of diversification and speciation. The biogeographical patterns and genetic structure were examined using statistical dispersal-vicariance analysis, Bayesian phylogenetic analysis, reduced median-joining haplotype network analysis, and discriminant analysis of principal components. The gene flow between related species was evaluated with an isolation-with-migration model. The ancestral range of the species of subsect. Macaronesicae was inferred to be Tenerife and the Cape Verde Islands, and Tenerife-La Gomera acted as sources of diversity to other islands of the Canary Islands. Inter-island colonization of E. lamarckii among the western islands and a colonization of E. regis-jubae from Gran Canaria to northern Africa were revealed. Both diversification between islands and radiation within islands have been revealed in the Euphorbia species (sect. Aphyllis subsect. Macaronesicae) of the Canary Islands. It was clear that this group began the speciation process in Tenerife-La Gomera, and this process occurred with gene flow between some related species.

  4. EL MAR DE CANARIAS. DESCRIPCIÓN GEOPOLÍTICA DE UNA SITUACIÓN PROBLEMÁTICA

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    Gilberto Martín Teixé

    2005-12-01

    Full Text Available RESUMEN:El estudio y debate sobre el ordenamientojurídico de las aguas territoriales en las Islas Canarias es tema de permanente actualidad. En el problema inciden la situación geográfica de las islas, el status político administrativo por el que se rigen y la legislación del Derecho Internacional del Mar que se le aplica. La soluciones que se aportan son diversas y comúnmente supeditadas a la visión política que las inspiran. PALABRAS CLAVE:Geopolítica, Islas Canarias, archipiélago, aguas territoriales, aguas interiores, mar territorial, zona económica exclusiva, La Convención del Mar de las Naciones Unidas sobre el Derecho del Mar. ABSTRACT:The research and debate on the Canary Islands territorial waters legal code is always a current affair. Many aspects such as the geographic situation of the islands, the political administrative status and the intemational legislation of the sea to be applied are involved in this problem. The solutions that are offered are numerous and generally subordinated to the political vision that inspire them. KEY WORDS:Geopolitics, Canary Islands, archipelago, territorial waters, internal waters, territorial sea, exclusive economic zone, United Nations Convention on the Law of the Sea (UNCLOS RÉSUMÉ:"L'étude et le débat de l'ordonnance juridique des eaux territoriales aux iles Canaries est un sujet de permanente actualité. Dans le problkme coincident la situation géograp- hique, le status politique-administratif par lequel elles sont régies et la Législation du Droit Intemational de la Mer que l'on lui applique. Les solutions apportées sont différentes et norma- lement soumises a la vision politique qui les inspirent". MOTS CLÉ:Géographie politique, Iles Canaries, archipel, eaux territoriale, eaux intérieures, mer territoriales, zone économique exclusive, La Convention des Nations Unies sur le droit de la Mer. 

  5. Las actividades agroambientales en Canarias ante los retos de futuro

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    Ramón Díaz Hernández

    2013-10-01

    Full Text Available Las actividades primarias en Canarias, y en especial, la agricultura, presentan una situación de crisis que amenaza con aumentar el abandono de fincas, la reducción de la producción y la pérdida de población rural. Los valores económicos, sociales, ambientales y culturales que caracterizan a estas actividades aconsejan una apuesta más decidida por el mantenimiento del sector, para lo que es necesario replantear en muchas zonas el desarrollo agrario integral vinculándolo a la conservación y recuperación ambiental y cultural, dentro de una concepción de desarrollo sostenible. Pues bien, en este artículo, partiendo de la exposición del valor que tiene la actividad agraria en las Islas, se describe su problemática actual y se apuntan sus oportunidades de desarrollo. Se concluye precisándose, a partir de los instrumentos de intervención existentes, objetivos globales, algunas recomendaciones estratégicas generales y propuestas de intervención que podrían ser tenidos en cuenta.Primary activities in the Canary Islands, and especially agriculture, are undergoing a crisis that threatens to continue to promote a move away from the countryside, a reduction in production and rural de-population. The economic, social, environmental and cultural values that characterise these activities indicate a need for more decisive support for maintaining this sector, making an integral development of farming necessary in many areas, linked to environmental and cultural conservation and recovery, as part of a sustainable development approach to the problem. With the value of farming activities as a starting point, this article describes the current problems and identifies the opportunities for development. The articles concludes by establishing global objectives, based on existing intervention instruments, some general strategic recommendations and proposals for intervention that could be taken on board.

  6. Turismo intervención publica en Canarias: transición del modelo cuantitivo al cuaitativo

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    Ramón Diaz Hernandez

    2008-09-01

    Full Text Available Confronté à une surfréquentation touristique, le Gouvernement local des Îles Canaries a publié un Arrêt (4/2001 qui reformule les Orientations Générales du Territoire et du Tourisme. L’objectif est de s’entendre sur les bases d’un modèle de développement insulaire soutenable, en mettant l’accent sur la gestion des ressources naturelles en général et le tourisme plus particulièrement. Cet Arrêt a été accompagné de normes dont l’objectif est de limiter la construction de nouveaux bâtiments hôteliers. Peu après, le Gouvernement a publié l’Arrêt 126/2001 qui limitait le développement touristique. Le Parlement adopta un autre Arrêt, la «Ley de Medidas Urgentes en Materia de Ordenación del Territorio y del Turismo de Canarias » (juillet 2001 qui détermine les conditions exigées aux établissements hôteliers de plus haute catégorie. Le Parlement donne aussi son accord à l’Arrêt 19/2003, «Directrices de Ordenación General y Directrices de Ordenación del Turismo de Canarias ».     Faced with excesses tourism, the local government of the Canary Islands issued a judgement (4 / 2001, which reformulates General Guidelines of Territory and Tourism. The aim is to set up the basis of a model of sustainable island development, with emphasis on natural resource management in general and tourism in particular. This decision was accompanied by standards whose objective is to limit the construction of new buildings for hotels. Shortly thereafter, the Government issued the ruling 126/2001 which limited the development of tourism. Parliament adopted another decree, "Ley de Medidas Urgent en Materia de Ordenación del Territorio y del Turismo de Canarias" (July 2001 which determines the conditions required for hotels higher category. The Parliament also gives its agreement to stop 19/2003, "Directrices de Ordenación General y Directrices de Ordenación del Turismo de Canarias."El desbordamiento ocasionado por el

  7. Horizontal distribution of invertebrate larvae around the oceanic island of Gran Canaria: the effect of mesoscale variability

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    José María Landeira

    2009-12-01

    Full Text Available In October 1991, the horizontal distribution of invertebrate larvae was studied in the waters surrounding the island of Gran Canaria (Canary Islands. The cruise was typified by the presence of three recurrent mesoscale hydrographic structures: a cyclonic eddy southwest of the island, a warm lee region downstream of the island and the offshore boundary of an upwelling filament from the African coast reaching the southeast of the island. Decapod larvae were the most abundant group. In general, a rather high spatial variability was found. The horizontal distribution of the invertebrate larvae groups showed that the highest values of abundance occurred in an elongated zone around the island oriented in the overall direction of flow, leeward and windward of the island, while the lowest values occurred off the eastern and western flanks of the islands. On the other hand, Stomatopoda and Mollusca larvae showed a distribution associated with the boundary of the upwelling filament and decapod larvae of pelagic species were distributed around the eddy structure. Our results suggest specific retention mechanisms for the larvae of neritic invertebrate populations that are related to the particular physical oceanography around Gran Canaria.

  8. Análisis geográfico de las relaciones comerciales exteriores de Canarias

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    Ramón Díaz Hernández

    2013-11-01

    Full Text Available Durante la década de los noventa, el comercio exterior de Canarias empieza a sentir los efectos de la incorporación de España a la Unión Europea (1986. La armonización de los mercados de destino y de origen, a resultas de este hecho, rompe poco a poco con las ventajas comerciales tradicionales de las Islas. Ello supone, a la vez, una mayor vinculación con Europa y un estrechamiento de los intercambios con el resto del Estado Español. No obstante, como resultado de una rica experiencia mercantil, el Archipiélago mantiene aún contactos comerciales con la mayor parte de los países y territorios de todos los continentes. Esa fortaleza patrimonial puede instrumentarse como plataforma de la Unión Europea en las relaciones Norte-Sur, pero también, como polo privilegiado en el comercio Sur-Sur, en la pugna por la expansión de los emergentes mercados del Hemisferio Sur.During the decade of the 1990s, foreign trade with the Canary 1slatids begins to feel the effects of Spain's incorporation into the European Community (1986. However, the coordination between foreign arid domestic markets has had little effect on the traditional commercial advantages of the Canary Islands. This implies, at the same time, a greater link with Europe and an increased exchange relationship with the rest of Spain. Nevertheless, as a result of a prosperous trading experience, the Canarian Archipelago still maintains commercial contacts with most of the countries in the world. This economic strength can be instrumental as a platform for the European Community in its relations between the North and the South. But, also, as a privileged pole in commerce within the South, in the struggle for expansion of the emerging markets in the Southern Hemisphere.

  9. Mantacaprella macaronensis, a new genus and species of Caprellidae (Crustacea: Amphipoda) from Canary Islands and Cape Verde.

    Science.gov (United States)

    Maite, Vázquez-Luis; José M, Guerra-García; Susana, Carvalho; Lydia Png-Gonzalez

    2013-01-01

    Mantacaprella macaronensis new genus, new species, is described based on specimens collected from Canary Islands and Cape Verde. Mantacaprella is close to the genera Parambus, Pseudolirius, Propodalirius and Paracaprella, but can be distinguished by the combination of the following characteristics: pereopods 3, 4 and 5 two-articulate; pereopods 6 and 7 six-articulate; mandibular molar present and palp absent; male abdomen with a pair of well-developed appendages. The new species has been found living in Cymodocea nodosa meadows and Caulerpa prolifera beds from 8.8 to 14.6 m depth in Gran Canaria (Canary Islands), and in natural rocky and artificial habitats (shipwrecks) at 25 m in Sal Island (Cape Verde). Even though the new species is one of the dominant amphipods inhabiting meadows of Cymodocea nodosa in Gran Canaria and in Cape Verde, it had not been described so far. This reflects the lack of knowledge on Macaronesian invertebrates, such as amphipods, and the need of further taxonomical studies to better characterise the whole biodiversity of this region and to design adequate programmes of management and conservation.

  10. Catálogo de los Halictini Halictus Latreille, 1804 y Lasioglossum Curtis, 1833 (Hymenoptera, Apoidea, Halictidae de la Península Ibérica y de las islas Canarias

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    Ornosa, C.

    2013-12-01

    Full Text Available The current work is a catalogue of the Halictini genera Halictus Latreille, 1804 and Lasioglossum Curtis, 1833 in the Iberian Peninsula and the Canary Islands. It includes the taxa, their synonymies, discussion, when necessary, and their geographic distribution as well (Tables 1, 2, 3 y 4. Some recent records of several species have been included too. The results (Table 1 indicate that this fauna is composed of 143 species and 161 subspecies: 126 appear in the Iberian Peninsula and 17 in the Canary Islands, where 6 of them and 17 subspecies are endemic, out of a total of 29 subespecies; 9 of the Canary species are present in both territories.En este catálogo se presenta un inventario actualizado de las especies de Halictini de los géneros Halictus Latreille, 1804 y Lasioglossum Curtis, 1833 de la Península Ibérica y de las Islas Canarias. Contiene 143 especies y 161 subespecies: 126 de las especies se conocen en la fauna ibérica y 17 en las Islas Canarias y, de estas, 6 especies y 17 subespecies son endémicas, de un total de 29 subespecies presentes en las islas; 9 de las especies canarias, son comunes a ambos territorios. De todos los taxones, además de la correspondiente discusión, si procede, se incluye su lista sinonímica y su distribución geográfica (Tablas 1, 2, 3 y 4. En algunas especies, se han incluido registros recientes que pueden resultar de interés.

  11. Islas de ida y vuelta. Canarias y El Caribe en contexto colonial

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    Ortiz García, Carmen

    2004-12-01

    Full Text Available On the presupposition that the conquest of the Canary Islands set the colonial stage for the later Spanish enterprises in the Americas, the author discusses a number of elements of identity shared by the islands of both the eastern Atlantic and the Caribbean. Sugar, the slave trade and the raising of bananas, cochineal and tobacco are the instances chosen for this comparative analysis. In addition, the author makes a reference to the legends of the apparition of the Virgin of Charity at El Cobre, in Cuba, and of Candlemas in Tenerife.

    Partiendo de la idea de que la conquista de las Islas Canarias fue el primer ensayo colonial de lo que luego desarrollarían los españoles en América, se examinan algunos elementos de identidad entre el mundo isleño atlántico y caribeño, producidos precisamente por esa situación inicial de dominio colonial. El azúcar, la trata de esclavos, los cultivos de plátano, grana y tabaco son los ejemplos escogidos para este análisis comparado. Finalmente se hace una referencia comparativa de las leyendas de la aparición de la Virgen de la Caridad del Cobre en Cuba y de la Virgen de Candelaria en Tenerife

  12. Some additions and corrections to the Coleoptera fauna of the Canary Islands

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    Machado, Antonio

    2014-06-01

    Full Text Available Two endomychid species described from El Hierro (Canary Islands are removed from the Canarian fauna: Dapsa hierrensis Franz, 1976 is a synonym of Archipines intricata (Gorham, 1889, nov. syn., and the single specimen (holotype was probably collected in Central America. Dapsa curta Franz, 1976 is also poorly described and based on a single female. Without a male it is not possible to assess with full confidence if it belongs to the African genus Danae or more probably to the Oriental genus Tragoscelis, and to which species. It is for sure not a Dapsa and its Canarian origin relates probably to another labeling error of the author, who also collected in Borneo, where this latter genus is present with 5 species. Consequently, Dapsa curta Franz, 1996 is proposed as nomen dubium. Furthermore, three genera are recorded for the Canaries for the first time: Silpha puncticollis Lucas, 1854 (Silphidae, the coffee bean borer Araecerus fasciculatus (DeGeer, 1775, and Bruchela rufipes (Olivier, 1790 both Anthribidae. Only the latter species can be considered as native; the other two are introduced recently and the Coffee bean weevil could become a pest.Dos especies de endomíquidos descritos de El Hierro (islas Canarias se eliminan de la fauna canaria: Dapsa hierrensis Franz, 1976 es una sinonimia posterior de Archipines intricata (Gorham, 1889, nov. syn., y el único ejemplar conocido (holotipo fue colectado probablemente en América Central. La descripción de Dapsa curta Franz, 1976 es muy pobre y se basa en una única hembra. Sin conocer el macho es imposible determinar con garantías si se trata del género Danae o, lo más probable, del género oriental Tragoscelis, o a cuál de sus especies pertenece, si no es nueva. Es seguro que no se trata de una Dapsa y el presunto origen canario radica seguramente en otro error de etiquetado del autor, que también colectó en Borneo, donde se conocen cinco especies de Tragoscelis. En consecuencia, se propone

  13. Vicia vulcanorum (Fabaceae a new species from the island of Lanzarote (Canary Islands

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    Morales-Mateos, J. B.

    2012-12-01

    Full Text Available Vicia vulcanorum J. Gil & M. L. Gil (Fabaceae, a new species of subg. Cracca (Dumort. Peterm., sect. Cracca Dumort. is described and illustrated from the island of Lanzarote, Canary Islands, north-west of Africa. It is related to and compared with Vicia cirrhosa C. Sm. ex Webb & Berthel. and Vicia filicaulis Webb & Berthel., two endemic species from the western and central group of the Canary Islands, and Vicia ferreirensis Goyder, an endemic species from Porto Santo Island, Madeira Archipelago.Se describe e ilustra Vicia vulcanorum J. Gil & M. L. Gil (Fabaceae, una nueva especie y endemismo de la isla de Lanzarote, Islas Canarias, perteneciente al subg. Cracca (Dumort. Peterm., sect. Cracca Dumort. Se encuentra relacionada y es comparada con Vicia cirrhosa C. Sm. ex Webb & Berthel. y Vicia filicaulis Webb & Berthel., especies endémicas de las islas centrales y occidentales del archipiélago canario, y con Vicia ferreirensis Goyder, especie endémica de la isla de Porto Santo, en el archipiélago de Madeira.

  14. Testing the AGN unification model in the infrared. First results with GTC/CanariCam

    Science.gov (United States)

    Ramos Almeida, C.

    2015-05-01

    The unified model for Active Galactic Nuclei (AGN) accounts for a variety of observational differences in terms of viewing geometry alone. However, from the fitting of high spatial resolution infrared (IR) data with clumpy torus models, it has been hinted that the immediate dusty surroundings of Type-1 and 2 Seyfert nuclei might be intrinsically different in terms of covering factor (torus width and number of clouds). Moreover, these torus covering factors also showed variations among objects belonging to the same type, in contradiction with simple unification. Interestingly, these intrinsic differences in Seyfert tori could explain, for example, the lack of broad optical lines in the polarized spectra of about half of the brightest Seyfert 2 galaxies. On the other hand, recent IR interferometry studies have revealed that, in at least four Seyfert galaxies, the mid-IR emission is elongated in the polar direction. These results are difficult to reconcile with unified models, which claim that the bulk of the mid-IR emission comes from the torus. In this invited contribution I summarize the latest results on high angular resolution IR studies of AGN, which constitute a crucial test for AGN unification. These results include those from the mid-infrared instrument CanariCam on the 10.4 m Gran Telescopio CANARIAS (GTC), which are starting to be published by the CanariCam AGN team, Los Piratas (https://sites.google.com/site/piratasrelatedpublications).

  15. Additions to the flora of Tenerife (Canary Islands, Spain

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    Verloove, F.

    2011-12-01

    Full Text Available Additions to the flora of Tenerife (Canary Islands, Spain.- Recent fieldwork in Tenerife, especially in September 2010, yielded several interesting new records of non-native vascular plants. Bothriochloa ischaemum var. songarica, “Asian” Cardamine flexuosa, Cestrum parqui, Digitaria violascens, Ficus lyrata, Ficus rubiginosa, Hoffmannseggia glauca, Hyparrhenia rufa subsp. altissima, Jacaranda mimosifolia, Merremia tuberosa, Passiflora morifolia, Phytolacca dioica, Schefflera actinophylla and Solanum abutiloides are reported for the first time from the Canary Islands, while Eragrostis barrelieri var. pygmaea, Ficus microcarpa, Ipomoea purpurea, Leucaena leucocephala subsp. glabrata, Sechium edule, Tradescantia zebrina and Turnera ulmifolia are new to the flora of the island of Tenerife. New records of Acacia cyclops, Atriplex suberecta, Heliotropium curassavicum, Paspalum dilatatum, P. notatum, Pluchea ovalis, Pulicaria paludosa, Sclerophylax spinescens and Solanum villosum subsp. miniatum confirm their recent expansion on the island of Tenerife. New records are provided for the recently described Sporobolus copei . Finally, Paspalum vaginatum (hitherto possibly confused with P. distichum and Potentilla indica are confirmed from the island of Tenerife.

    Adiciones para la flora de Tenerife (Islas Canarias, España.- Algunos recientes trabajos de campo en Tenerife, especialmente en Septiembre de 2010, trajeron consigo varias nuevas e interesantes adiciones de plantas vasculares no autóctonas. Bothriochloa ischaemum var. songarica, Cardamine flexuosa “Asiática”, Cestrum parqui, Digitaria violascens, Ficus lyrata, Ficus rubiginosa, Hoffmannseggia glauca, Hyparrhenia rufa subsp. altissima, Jacaranda mimosifolia, Merremia tuberosa, Passiflora morifolia, Phytolacca dioica, Schefflera actinophylla y

  16. Radon in Groundwater of the Northeastern Gran Canaria Aquifer

    National Research Council Canada - National Science Library

    Hector Alonso; Tatiana Cruz-Fuentes; Jesús G Rubiano; Jonay Gonzalez-Guerra; María del Carmen Cabrera; Miguel A Arnedo; Alicia Tejera; Alejandro Rodríguez-Gonzalez; Francisco J Perez-Torrado; Pablo Martel

    2015-01-01

    ... (Canary Islands, Spain) utilizing a closed loop system consisting of an AlphaGUARD monitor that measures radon activity concentration in the air by means of an ionization chamber, and an AquaKIT set that transfers dissolved...

  17. The influence of mesoscale physical processes on the larval fish community in the Canaries CTZ, in summer

    Science.gov (United States)

    Rodríguez, J. M.; Barton, E. D.; Hernández-León, S.; Arístegui, J.

    2004-08-01

    We have studied the relation between the hydrography, the composition and horizontal structure of the larval fish community, and the horizontal distribution patterns of larval fish abundances in an area characterised by strong mesoscale oceanographic activity, located between the Canary Islands and the African coast (the Canaries Coastal Transition Zone), during August 1999. Upwelling, upwelling filaments, cyclonic and anticyclonic eddies and island wakes are typical mesoscale features of the northwest African coast in summer. A single upwelling filament off Cabo Juby was joined in mid-August by a second that originated about 100 km to the north. The two filaments flowed together and merged 100 km offshore. The merged filament was partially entrained around a cyclonic eddy, trapped between the Canary Islands and the African coast, and interacted with cyclonic and anticyclonic eddies shed from Gran Canaria. Mesoscale oceanographic features strongly influenced the horizontal distributions of fish larvae. Eddies acted as a mechanism of concentration, while upwelling filaments were dispersive, transporting larvae from the African neritic zone into oceanic areas and towards the Canary archipelago. This transport was the major cause of the predominance of neritic larvae in the composition of the larval fish community of the area. The results also suggest: (1) that anchovy larvae are good indicators of the offshore displacement of upwelled water; (2) that the alternation between anchovy and sardine as species dominant in the larval fish community of the area during summer depends upon the water temperature in the African upwelling region, anchovy dominating at higher temperature; (3) that a coupling of anchovy and sardine spawning with the mesoscale oceanographic structure formed by the upwelling filaments and trapped eddy overcomes the negative effect that Ekman transport has on their populations.

  18. Recent unrest at Canary Islands' Teide Volcano?

    National Research Council Canada - National Science Library

    Carracedo, Juan Carlos; Troll, Valentin R; Pérez, Francisco J; Badiola, Eduardo Rodríguez; Machín, Alex Hansen; Paris, Raphael; Guillou, Hervé; Scaillet, Stéphane

    2006-01-01

    ... that the volcanic unrest might culminate in renewed eruptive activity. Such was the situation for Teide volcano, located on Tenerife in the Canary Islands, when a mild seismic swarm during April...

  19. Incidentes en la zona aérea de Canarias y Africa occidental durante la II Guerra Mundial

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    Juan José Díaz Benítez

    2013-11-01

    Full Text Available La política exterior española durante la II Guerra Mundial empezó a virar hacia la neutralidad con la llegada de Gómez Jordana al Ministerio de Asuntos Exteriores en 1942. Sin embrago, la colaboración con el Eje, aún no concluida, provocó, fuertes presiones por parte de los aliados durante el resto de la guerra y alentó la sospecha de que aún continuaba el abastecimiento clandestino de submarinos alemanes en Canarias. Por ello. los aviones aliados sobrevolaron frecuentemente la Zona Aérea de Canarias y África Occidental entre principios de 1943 y el verano de 1944, provocando la reacción de las baterías de artillería antiaérea españolas e incluso la intervenci6n de los cazas con base en Gando. En ningún momento las fuerzas españolas intentaron derribar a los aviones aliados que atravesaban las aguas territoriales, sino sólo avisarlos para que se retiraran. No obstante, los aviones aliados persistieron, dando lugar a graves incidentes que estuvieron punto de ocasionar una fatalidad. Finalmente, las prolongadas gestiones diplomáticas emprendidas a finales de 1943 acabaron con estos incidentes, los cuales son un ejemplo olvidado de las tensas relaciones entre España y los aliados durante el declive del Eje.Spanish foreign policy through World War II turned to the way of neutrality after Gómez Jordana arrived at the Ministry of Foreign Affaires in 1943.  Howver, the persistent aid to tha Axis rose strong pressures by the Allies for the rest of the war and encouraged them for searching German U-boots at the Canary Islands. So Allied airplanes frequently flew over the Canary Islands and West Africa Aerial Zone between the beginning of 1943 and the summer of 1944, tempting the Spanish anti-aircraft batteries and the fighters based in Gaildo Gando reaction. The Spanish forces never tried to destroy the Allied aircrafts, but baut only warned them to keep away from yje Spanish aerial zone. Nevertheless, Allied planes still went on

  20. Las actividades agroambientales en Canarias ante los retos de futuro

    National Research Council Canada - National Science Library

    Ramón Díaz Hernández; Juan Manuel Parreño Castellano

    2013-01-01

    Las actividades primarias en Canarias, y en especial, la agricultura, presentan una situación de crisis que amenaza con aumentar el abandono de fincas, la reducción de la producción y la pérdida de población rural. Los valores...

  1. Reproductive phenology of three species of Gelidiales (Rhodophyta in two macroalgal communities from Tenerife (Atlantic Ocean, Canary Islands, Spain

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    Polifrone, Milena

    2012-12-01

    Full Text Available The reproductive phenology of three species of Gelidiales, Gelidium canariense, Gelidium arbuscula and Pterocladiella capillacea, was analysed seasonally for a period of one year in two localities on the West coast of Tenerife (Atlantic Ocean, Canary Islands, Spain. Considerations are provided on sex ratio, maximum length and branch order of uprights and on the length of the thalli for each sexual and asexual phase of the Canary Islands populations. The three species were characterized by a high percentage of tetrasporophytes, while female and male gametophytes have been observed only in little proportion. Only G. canariense showed gametophytes in all seasons while the occurrence of gametophytes in G. arbuscula and Pterocladiella capillacea demonstrated a clear seasonality.

    La fenología reproductiva de tres especies de Gelidiales, Gelidium canariense, Gelidium arbuscula y Pterocladiella capillacea, ha sido analizada estacionalmente por un periodo de un año en dos localidades de la costa este de Tenerife (Oceano Atlántico, Islas Canarias, España. Se realizan consideraciones sobre sex ratio, longitud máxima y orden de ramificación de los ramets y se aporta información sobre la longitud del talo por cada fase sexual y asexual de las poblaciones canarias. Las tres especies se caracterizan por presentar un elevado porcentaje de tetrasporofitos, mientras que los gametofitos masculinos y femeninos han sido observados en proporciones reducidas. Sólo G. canariense presenta gametofitos en todas las estaciones, mientras que en G. arbuscula y Pterocladiella capillacea demostraban una clara estacionalidad.

  2. Causes of Admission for Raptors to the Tafira Wildlife Rehabilitation Center, Gran Canaria Island, Spain: 2003-13.

    Science.gov (United States)

    Montesdeoca, Natalia; Calabuig, Pascual; Corbera, Juan A; Orós, Jorge

    2016-07-01

    We report the causes of morbidity of 2,458 free-living raptors admitted to the Tafira Wildlife Rehabilitation Center on Gran Canaria Island, Spain, during 2003-13. The seasonal cumulative incidences were investigated while considering estimates of the wild populations in the region. These methods were used as a more accurate approach to assess the potential ecologic impact of different causes of morbidity. The most frequently admitted species were the Eurasian Kestrel ( Falco tinnunculus ; 53.0%), the Eurasian Long-eared Owl ( Asio otus canariensis; 28.1%), the Canary Islands Common Buzzard ( Buteo buteo insularum; 8.0%), and the Eurasian Barn Owl ( Tyto alba ; 4.4%). The most frequent causes of admission were trauma (33.8%), orphaned-young birds (21.7%), unknown (18.4%), and metabolic/nutritional disease (11.1%). Local morbidity caused by glue trapping and entanglement in burr bristlegrass (Setaria adhaerens) had prevalences of 5.0% and 1.8%, respectively. The highest number of admissions during the breeding and nonbreeding seasons was observed for the Eurasian Barn Owl and the Barbary Falcon ( Falco pelegrinoides ), respectively, mainly due to trauma of unknown origin.

  3. Estudio micológico de El Canal y Los Tiles (La Palma, Islas Canarias. V. Datos adicionales

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    Leal, Julio

    2009-12-01

    Full Text Available An annotated catalogue of 66 taxa, collected in the early MAB Reserve El Canal y Los Tiles is presented. Among these taxa, 11 species are new for La Palma island and 5 are recorded for the first time in the Canary Islands. Taxonomic comments on some critical species and information about the distribution in the Macaronesian bioregion of all the studied taxa are given. Based on our previous publications, global data on biodiversity, substrates and distribution of the mycobiota in the different plant communities present in the sampled area are analyzed.

    Se presenta un estudio sobre 66 especies, pertenecientes a las divisiones Myxomycota (21, Ascomycota (29 y Basidiomycota (16, encontradas en la antigua Reserva de la Biosfera El Canal y Los Tiles. De ellas 11 se citan por primera vez para la isla de La Palma, siendo 5 de éstas nuevas para Canarias. Se hacen comentarios taxonómicos sobre algunos táxones conflictivos, además de amplia información sobre su distribución en la Región Macaronésica. En base a publicaciones propias anteriores, se aportan datos globales sobre biodiversidad, sustratos y distribución de la micobiota en las diferentes unidades ambientales presentes en el área de estudio.

  4. Striking resilience of an island endemic bird to a severe perturbation: the case of the Gran Canaria blue chaffinch

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    Moreno, Á. C.

    2018-01-01

    Full Text Available Evidence regarding population trends of endangered species in special protection areas and their recovery ability from catastrophic disturbances is scarce. We assessed the population trend of the Gran Canaria blue chaffinch (Fringilla polatzeki, a habitat specialist endemic to the pine forest of Inagua in the Canary Islands, following a devastating wildfire in July 2007. Using a standardized census program that accounts for detectability, we have monitored the population trend of the species since Inagua was declared a Strict Nature Reserve in 1994. The breeding population density of the blue chaffinch remained stable in Inagua from the beginning of the monitoring program in 1994 until the year before the wildfire. However, in spring 2008, the population density decreased by half with respect to density in the preceding years. Since 2008, the population has gradually increased, reaching its highest recorded density in 2016 (15.8 birds/km2.This represents an average annual increase of 23.7 %, indicating impressive resilience to catastrophic events. The creation of Inagua as a strict nature reserve did not therefore increase the global population or protect the blue chaffinch against a demographic crisis but probably prevented a deepening of the demographic crisis or further declines. Except for the two years immediately after the severe wildfire of 2007, the population density of the blue chaffinch in Inagua has remained relatively stable at around 9–16 birds/km2, the lowest recorded abundance for a small woodland passerine in the Western Palearctic.

  5. Felsic volcanism in a basic shield (El Hierro, Canary Islands). Implications in terms of volcanic hazards.

    Science.gov (United States)

    Pedrazzi, Dario; Becerril Carretero, Laura; Martí Molist, Joan; Meletlidis, Stavros; Galindo Jiménez, Inés

    2014-05-01

    El Hierro, the southwesternmost and smallest island of the Canary Archipelago, is a complex basaltic shield volcano characterized by mainly effusive volcanism with both Strombolian and Hawaiian activity. Explosive felsic volcanism is not a common feature of the archipelago and, so far, it has only been reported on the central islands of Tenerife and Gran Canaria, where it has been responsible for the formation of large central volcanic complexes. The presence of felsic rocks on the other islands of the archipelago and specifically on El Hierro is mostly restricted to subvolcanic intrusions and a few lava flows, generally associated with the oldest parts of the islands. We hereby report the presence of a trachytic pumice deposit on the island of El Hierro, referred to here as the Malpaso Member. A detailed stratigraphic, lithological, and sedimentological study was carried out on the deposits of this explosive episode of felsic composition, which is the only one found on the Canary Islands apart from those of Gran Canaria and Tenerife. Four different subunits were identified on the basis of their lithological and granulometrical characteristics. The products of the eruption correspond to a single eruptive event and cover an area of about 13 km2. This deposit originated from a base-surge-type explosive eruption with a subsequent radial emplacement of dilute PDC currents, was emplaced from the vent that would have been located in a similar position to the volcano of Tanganasoga. The low vesicularity of juvenile fragments and the morphological characteristics of the fine particles, as well as the high proportion of lithic fragments and the ash-rich nature of the deposit, suggest that magma/water interaction controlled the dynamics of the eruption. This study demonstrates that magmas from El Hierro could have the potential for producing an explosive eruption, in an environment in which the majority of the eruptions are basaltic and effusive in nature. Bearing in mind

  6. Movilidad y Adaptación Biomecánica: Una aproximación a la relación entre territorio y propiedades geométricas de la extremidad inferior en la población prehispánica de Gran Canaria.

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    Jonathan Santana

    2015-10-01

    The relationship between territory and bone structure is important to define the influence of this factor and establishing more precise methods of analysis in the investigation of mobility in archaeological populations. This article aims to explore the relationship between mobility and territory in pre-Hispanic society of Gran Canaria (Canary Islands, Spain. The geometric properties of the lower limb and its relationship with the slope and economic catchment area of settlements related to settlements are evaluated. This contribution is a model that serves as a reference for the analysis of mobility and influence of territory in archaeological populations

  7. Transport pathways of decapod larvae under intense mesoscale activity in the Canary-African coastal transition zone: implications for population connectivity

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    José M. Landeira

    2017-09-01

    Full Text Available We investigate the transport dynamics of decapod larvae in the Canary-African coastal transition zone (C-ACTZ, where larval assemblages are poorly known. In August 1999, during the FAX99 cruise, the waters downstream of the Canary Island archipelago displayed intense mesoscale activity, with numerous cyclonic and anticyclonic eddies as well as upwelling filaments. Our results illustrate a close relationship between these mesoscale oceanographic structures and the distribution of decapod larvae, using both field observations and Lagrangian transport modelling. Analysis of plankton samples shows that larvae of pelagic species were excluded from filament waters, whereas larvae of neritic species were heterogeneously distributed, suggesting that the C-ACTZ is a mixing area where larvae originating from both the Canary Islands and the African coast may be present at the same time. This finding was supported by the simulations, which suggested that the larvae collected in the offshore waters south of Gran Canaria came mainly from the African population (between Cape Bojador and Cape Juby during early August, whereas during the second half of August the targeted area was dominated by larvae released from Fuerteventura populations. Our observations introduce new insights into our understanding of marine population connectivity, the dispersal pathways of the terrestrial biota, and general biogeography in the region.

  8. The early colonial atlantic world: New insights on the African Diaspora from isotopic and ancient DNA analyses of a multiethnic 15th-17th century burial population from the Canary Islands, Spain.

    Science.gov (United States)

    Santana, Jonathan; Fregel, Rosa; Lightfoot, Emma; Morales, Jacob; Alamón, Martha; Guillén, José; Moreno, Marco; Rodríguez, Amelia

    2016-02-01

    The Canary Islands are considered one of the first places where Atlantic slave plantations with labourers of African origin were established, during the 15th century AD. In Gran Canaria (Canary Islands, Spain), a unique cemetery dated to the 15th and 17th centuries was discovered adjacent to an ancient sugar plantation with funerary practices that could be related to enslaved people. In this article, we investigate the origin and possible birthplace of each individual buried in this cemetery, as well as the identity and social status of these people. The sample consists of 14 individuals radiocarbon dated to the 15th and 17th centuries AD. We have employed several methods, including the analysis of ancient human DNA, stable isotopes, and skeletal markers of physical activity. 1) the funerary practices indicate a set of rituals not previously recorded in the Canary Islands; 2) genetic data show that some people buried in the cemetery could have North-African and sub-Saharan African lineages; 3) isotopic results suggest that some individuals were born outside Gran Canaria; and 4) markers of physical activity show a pattern of labour involving high levels of effort. This set of evidence, along with information from historical sources, suggests that Finca Clavijo was a cemetery for a multiethnic marginalized population that had being likely enslaved. Results also indicate that this population kept practicing non-Christian rituals well into the 17th century. We propose that this was possible because the location of the Canaries, far from mainland Spain and the control of the Spanish Crown, allowed the emergence of a new society with multicultural origins that was more tolerant to foreign rituals and syncretism. © 2015 Wiley Periodicals, Inc.

  9. Oceanic Platform of the Canary Islands: an ocean testbed for ocean energy converters

    Science.gov (United States)

    González, Javier; Hernández-Brito, Joaquín.; Llinás, Octavio

    2010-05-01

    The Oceanic Platform of the Canary Islands (PLOCAN) is a Governmental Consortium aimed to build and operate an off-shore infrastructure to facilitate the deep sea research and speed up the technology associated. This Consortium is overseen by the Spanish Ministry of Science and Innovation and the Canarian Agency for Research and Innovation. The infrastructure consists of an oceanic platform located in an area with depths between 50-100 meters, close to the continental slope and four kilometers off the coast of Gran Canaria, in the archipelago of the Canary Islands. The process of construction will start during the first months of 2010 and is expected to be finished in mid-year 2011. PLOCAN serves five strategic lines: an integral observatory able to explore from the deep ocean to the atmosphere, an ocean technology testbed, a base for underwater vehicles, an innovation platform and a highly specialized training centre. Ocean energy is a suitable source to contribute the limited mix-energy conformed in the archipelago of the Canary Islands with a total population around 2 million people unequally distributed in seven islands. Islands of Gran Canaria and Tenerife support the 80% of the total population with 800.000 people each. PLOCAN will contribute to develop the ocean energy sector establishing a marine testbed allowing prototypes testing at sea under a meticulous monitoring network provided by the integral observatory, generating valuable information to developers. Reducing costs throughout an integral project management is an essential objective to be reach, providing services such as transportation, customs and administrative permits. Ocean surface for testing activities is around 8 km2 with a depth going from 50 to 100 meters, 4km off the coast. Selected areas for testing have off-shore wind power conditions around 500-600 W/m2 and wave power conditions around 6 kW/m in the East coast and 10 kW/m in the North coast. Marine currents in the Canary Islands are

  10. "Canary Islands (NE Atlantic) as a biodiversity 'hotspot' of Gambierdiscus: Implications for future trends of ciguatera in the area".

    Science.gov (United States)

    Rodríguez, Francisco; Fraga, Santiago; Ramilo, Isabel; Rial, Pilar; Figueroa, Rosa Isabel; Riobó, Pilar; Bravo, Isabel

    2017-07-01

    In the present study the geographical distribution, abundance and composition of Gambierdiscus was described over a 600km longitudinal scale in the Canary Islands. Samples for cell counts, isolation and identification of Gambierdiscus were obtained from five islands (El Hierro, Tenerife, Gran Canaria, Fuerteventura and Lanzarote). Average densities of Gambierdiscus spp. between 0 and 2200cellsg(-1) blot dry weight of macrophyte were recorded. Morphological (light microscopy and SEM techniques) and molecular analyses (LSU and SSU rDNA sequencing of cultures and single cells from the field) of Gambierdiscus was performed. Five Gambierdiscus species (G. australes, G. caribaeus, G. carolinianus, G. excentricus and G. silvae), together with a new putative species (Gambierdiscus ribotype 3) were identified. These results suggest that some cases of CFP in the region could be associated with the accumulation of ciguatoxins in the marine food web acquired from local populations of Gambierdiscus. This unexpected high diversity of Gambierdiscus species in an area which a priori is not under risk of ciguatera, hints at an ancient settlement of Gambierdiscus populations, likely favored by warmer climate conditions in the Miocene Epoch (when oldest current Canary Islands were created), in contrast with cooler present ones. Currently, warming trends associated with climate change could contribute to extend favorable environmental conditions in the area for Gambierdiscus growth especially during winter months. Copyright © 2017 The Author(s). Published by Elsevier B.V. All rights reserved.

  11. ACTITUDES HACIA LA VARIEDAD CANARIA : Un estudio sociolingüístico de estudiantes universitarios en Las Palmas de Gran Canaria.

    OpenAIRE

    Hellström, Jennie

    2016-01-01

    En este estudio se analizan las actitudes lingüísticas hacia la variedad canaria en comparación con la variedad español peninsular considerado estándar de veinte estudiantes universitarios en Las Palmas de Gran Canaria. La investigadora utiliza una versión modificada del método matched guise que consiste en una grabación de cuatro versiones de un mismo texto leído por dos hablantes de la variedad canaria y dos hablantes de la variedad español peninsular considerado estándar. Los informantes e...

  12. The Caridean Crustacea of the Canary Islands

    NARCIS (Netherlands)

    Holthuis, L.B.

    1949-01-01

    The present paper is based mainly on material collected at the Canary Islands during the spring of 1947 by Dr. G. Thorson of Universitetets Zoologiske Museum at Copenhagen and Dr. C. O. van Regteren Altena of the Rijksmuseum van Natuurlijke Historie at Leiden. Most of the specimens were collected by

  13. The water landscapes of the Canary Islands

    DEFF Research Database (Denmark)

    Lee, Gini; Braae, Ellen Marie; Diedrich, Lisa

    2013-01-01

    Island environments, particularly small archipelagos such as the Canary Islands, are more visible subject to the vagaries of change wrought by ecological and climate dynamics, shifting social conditions and economic impacts subject to global markets, than is witnessed on continental worlds....

  14. Some water mites (Acari, Hydrachnidia from Caldera de Taburiente National Park (La Palma, Canary Islands

    Directory of Open Access Journals (Sweden)

    Valdecasas, A. G.

    2002-12-01

    Full Text Available Protzia cf. lata, Lebertia fimbriata Thor, 1899; Limnesia martianezi Lundblad, 1962; Atractides gomerae Lundblad, 1962 are mentioned for the first time for the island of La Palma: Feltria menzeli Walter, 1922 and Aturus atlantica Lundblad, 1942 for the first time in the Canary islands. It is the first record of the genus Feltria Koenike, 1892 in Macaronesia.

    Protzia cf. lata, Lebertia fimbriata Thor, 1899; Limnesia martianezi Lundblad, 1962; Atractides gomerae Lundblad, 1962 han sido encontradas por primera vez en la isla de La Palma: Feltria menzeli Walter, 1922 y Aturus atlantica Lundblad, 1942 son nueva cita para las islas Canarias y es la primera vez que se registra el género Feltria Koenike, 1892 en Macaronesia.

  15. Consideraciones en torno a los sistemas productivos de las sociedades prehistóricas canarias: los modelos de Tenerife y Gran Canaria

    Directory of Open Access Journals (Sweden)

    Javier Velasco Vázquez

    2013-11-01

    Full Text Available En el presente trabajo se analizan diversos aspectos de los sistemas productivos aborígenes de Tenerife y Gran Canaria y su incidencia en la organización socioeconómica de ambas formaciones.In this paper we aim to analyse some aspects about aborigine productive systems of Tenerife and Gran Canaria and their incidence in the socioeconomic organisation of these communities.

  16. La jerarquía y el sistema urbano de Canarias durante el Antiguo Régimen

    Directory of Open Access Journals (Sweden)

    Pedro C. QUINTANA ANDRÉS

    2009-12-01

    Full Text Available RESUMEN: El organigrama y la jerarquía urbana en las Islas Canarias se encuentran mediatizadas por la estructura económica y el desarrollo de la formación social regional. El fraccionamiento del espacio, la dependencia exterior, la posición geoestratégica internacional o las reiteradas alternativas en la potenciación de diversos productos de exportación fueron los que marcaron, a grandes rasgos, las principales características del sistema urbano canario. La ciudad surge allí donde se asientan los órganos del poder que representan a la Corona, la Iglesia y a la población (Cabildo, Obispado, Real Audiencia, Capitán General, asumiendo gran parte de las funciones demandadas por los vecinos de toda la región. A su vez, una alícuota parte de su población será la que acumule y redistribuya las rentas generadas, beneficiando a esta oligarquía local compuesta por grandes comerciantes extranjeros, hacendados y eclesiásticos que integran el Cabildo Catedral. Palabras clave: Islas Canarias, España, sistema social urbano, oligarquía local, comerciantes extranjeros, Cabildo Catedralicio.ABSTRACT: The chart and the urban hierarchy in the Canary Islands are mediatized by the economic structure and the development of social and regional formation. The division of the space, the external dependence, the geostrategic international position or the reiterated choices, giving the power to different export products, marked to a great extent the main characteristic of the cañarían urban system. The city appears where the différents parts of power are settled so they represent the Crown, the Church and the population (Inter-island Council, Bishopric, County Court, Field Marshal, also this city assumes the majority of functions requested by neighbours from all the regions. At the some time, an aliquot part of population will accumulate and distribute the generated incomes in favour of this local oligarchy constituted by great foreing merchants

  17. Género y tercera edad en Canarias

    OpenAIRE

    Rodríguez Alemán, Rosalía

    2009-01-01

    Programa de doctorado: Formación del profesorado. [ES] Con el objetivo de caracterizar la vivencia de la vejez en la Comunidad Canaria y aventurar posibles cambios a futuro se elaboró un trabajo de corte ensayístico -con perspectiva de género- estructurado en doce capítulos. El primero expone las bases teóricas y características de la investigación; el segundo desarrolla el marco teórico que la fundamente; y los capítulos tercero y cuarto caracterizan el envejecimiento desde lo global a lo...

  18. Crecimiento económico en Islas Canarias

    OpenAIRE

    Macías Andrade, Esther; Meade Cantú, Juan Carlos; Suárez Martín, Cristina; Puig Gomara, Alexandre

    2012-01-01

    Un breve análisis de la economía Canaria y su crecimiento en esta última década.Entorno: El archipiélago canario es un territorio muy vinculado a los acontecimientos exteriores. Estudios económicos encuentran evidencia que el ciclo económico canario mantiene estrechos lazos con la economía internacional incluso más significativos que los que mantiene con el entorno europeo o con el nacional. Por esta razón hemos tomado muy en cuenta lo que acontece en las economías internacionales.Nos hemos c...

  19. Obesidad infantil y juvenil en la Comunidad Canaria

    OpenAIRE

    Elustondo Elizalde, Hidatsa

    2014-01-01

    En este trabajo, voy a desarrollar un tema que se encuentra de actualidad en nuestra sociedad; Es el tema relacionado con la obesidad infanto-juvenil, pero delimitado al territorio de la Comunidad Canaria. En el trabajo abordaré cuales son las causas de cifras tan elevadas de obesidad en la comunidad, los factores implicados y para finalizar, realizaré un plan de actuación para su implantación escolar donde aparecerán temas como el de la alimentación equilibrada y saludable, y el ejercicio...

  20. Críticas al exceso de clero en las Canarias de los Austrias

    Directory of Open Access Journals (Sweden)

    Esteban Alemán Ruiz

    2013-11-01

    Full Text Available Las quejas por el crecimiento desproporcionado del clero bajo los AUstrias no fueron privativas de los reinos peninsulares de la Corona de Castilla. En Canarias también las hubo, aunque la voces contrarias d Id proliferación de conventos y monasterios y -en menor medida- a la amorti7ación de la tierra, se escucharon comparativamente tarde (después del primer tercio del XVII y, sobre todo, en la segunda mitad del siglo. Al igual que en otros territorios de la Monarquía hispánica, la crítica procedió del mundo seglar, pero también de dentro del propio estamento eclesiástico. La protesta del primero se organizó en torno a los concejos o cabildos insulares (aunque no faltó la del vecindario sin mediación institucional, a la cabeza de todos el de Tenerife, isla que contaba con el clero secular más numeroso del Archipi6lago y donde se fundó la mayor cantidad -con diferencia- de casas de religión. También el episcopado, el cabildo catedralicio y el clero parroquia se opusieron a lo que entendían como un aumento desmedido de la fundaciones del clero regular, en ocasiones en perfecta sintonía con las autoridades seglares, si bien su comportamiento no se comprende al margen de la conflictividad intestina del estamento (lo cual, sumado a la competencia por la captación de limosnas y rentas, explica las críticas vertidas por unas órdenes religiosas contra otras. El estudio de estas posturas -y de los casos particulares a través de los cuales se manifestaron habitualmente- apenas si puede ser esbozado, dado el estado actual de nuestros conocimientos sobre el tenia. No obstante, todo apunta a que semejante conciencia de saturación obedeció -en parte, al menos- a un crecimiento del clero en las Islas desequilibrado desde los puntos de vista demográfico, económico y espacial.The complaints due to the desproptionate increasement of fhe clergy in the reign of the Spanish Habsburgs were not exclusive of the territories in the mainland of

  1. Marineros extranjeros en los protocolos notariales de Gran Canaria (1590-1599

    Directory of Open Access Journals (Sweden)

    María Berenice Moreno Florido

    2013-11-01

    Full Text Available Este trabajo de investigación pretende un análisis detallado y riguroso que nos ayude a tener un mayor conocimiento de la sociedad canaria y sobre todo de su relación con el exterior, centrándonos en el Atlántico europeo. De esta manera consideramos que se trata de una aportación más para el entendimiento profundo del Archipiélago canario durante el Antiguo Régimen. En este sentido debemos señalar que no existe un estudio de estas características que relacione la actividad de los marineros extranjeros y su actuación intrínseca con el comercio así como la vida de éstos y su entorno. Por este motivo hemos decidido realizar un análisis que abarque cada uno de los aspectos que podemos entresacar de la fuente empleada, los protocolos notariales. Del mismo modo el periodo escogido, 1590-1599, radica en la influencia de la política filipina en una época llena de hostilidades y decadencia para el Estado español. Así nos hemos centrado en la última etapa del reinado de Felipe II mostrando una década de contrabando y actividad pirática y corsaria de manera acusada en el Archipiélago canario. Asimismo a esta circunstancia debemos añadir las cuestiones religiosas caracterizadas por la extensión del protestantismo en Europa y la consecuente actuación del Concilio de Trento junto a la actividad inquisitorial que se tornará cada vez más rígida, fundamentalmente en los lugares de fronteras como es el caso isleño. Igualmente es importante tener en cuenta que la actividad económica se conforma como pilar del desarrollo y la evolución socio-económica de las Islas, sobre todo en su papel de enlace entre Europa, África y América.This research pretends to be a rundown and rigorous analysis that help us to have a better knowledge of the Canarian Society, and over all, its relationship with the outer, principally in the Europe Atlantic Ocean. In this way, we consider that it is another contribution for the deep understanding of the

  2. Assessment of the abiotic and biotic effects of sodium metabisulphite pulses discharged from desalination plant chemical treatments on seagrass (Cymodocea nodosa) habitats in the Canary Islands.

    Science.gov (United States)

    Portillo, E; Ruiz de la Rosa, M; Louzara, G; Ruiz, J M; Marín-Guirao, L; Quesada, J; González, J C; Roque, F; González, N; Mendoza, H

    2014-03-15

    Reverse osmosis membranes at many desalination plants are disinfected by periodic shock treatments with sodium metabisulphite, which have potentially toxic effects to the environment for marine life, although no empirical and experimental evidence for this is yet available. The aim of this study was to characterise for the first time, the physico-chemical modification of the marine environment and its biological effects, caused by hypersaline plumes during these membrane cleaning treatments. The case study was the Maspalomas II desalination plant, located in the south of Gran Canaria (Canary Islands, Spain). Toxicity bioassays were performed on marine species characteristic for the infralittoral soft bottoms influenced by the brine plume (Synodus synodus and Cymodocea nodosa), and revealed a high sensitivity to short-term exposure to low sodium metabisulphite concentrations. The corrective measure of incorporating a diffusion system with Venturi Eductors reduced nearly all the areas of influence, virtually eliminating the impact of the disinfectant. Copyright © 2013 Elsevier Ltd. All rights reserved.

  3. territorial de la población de Canarias

    Directory of Open Access Journals (Sweden)

    Antonio Álvarez Alonso

    2005-01-01

    Full Text Available Este artículo tiene como objetivo analizar el crecimiento y los desplazamientos experimentados por la población de Canarias durante las dos últimas décadas del siglo XX, período en el que el Archipiélago transformó su modelo de desarrollo económico y demográfico. Durante aquellos años el crecimiento demográfico de Canarias fue del doble de la media española, consecuencia de un proceso de carácter inmigratorio jamás conocido. Tal crecimiento afectó de manera desigual a las islas, habiendo alcanzado alguna de ellas tasas anuales diez veces superiores a la media estatal. Al mismo tiempo, se ha producido también un importante desequilibrio en la distribución espacial de la población, pues han crecido muchos los sures, menos los nortes y se han estancado las áreas metropolitanas. A su vez, se han vaciado demográficamente los núcleos de las medianías de los sures a favor de los litorales, consecuencia del cambio del modelo agropecuario por el turístico.

  4. Las revistas científicas de Historia publicadas en Canarias: a propósito de Vegueta (1992-2003

    Directory of Open Access Journals (Sweden)

    Manuel Ramírez Sánchez

    2013-10-01

    Full Text Available Se analiza la problemática actual de las publicaciones científicas especializadas en Historia que se editan en Canarias, que, aunque aparecen indexadas en algunas bases de datos y directorios de publicaciones periódicas, carecen de una visibilidad que vaya más allá del ámbito estrictamente regional. La creciente implantación de modelos de evaluación de la investigación en las áreas de Humanidades y Ciencias Sociales que, entre otras cosas, priorizan la publicación de la investigación científica en revistas competitivas, supone un serio inconveniente para la supervivencia de estas revistas. Tomando como ejemplo la revista Vegueta: Anuario de la Facultad de Geografía e Historia de la Universidad de Las Palmas de Gran Canaria, se analiza el grado de cumplimiento de los estándares internacionales en materia de publicaciones científicas periódicas, al tiempo que se proponen una serie de mejoras que, en caso de aplicarse, mejorarían notablemente su calidad editorial y permitirían la inclusión de la revista en las principales bases de datos españolas e internacionales.In this essay, we will analyse the problems History Reviews published in the Canary Islands are facing now. Though some of these reviews appear indexed in some data bases and listings of publications, they are virtually unknown beyond their region. The progressive implementation of parameters to evaluate the quality of research in the fields of Humanities and Social Sciences, those, which come to priorize publication of scientific research in competitive reviews, will make the future of these reviews turn bleak. We will analyse whether Vegueta: Anuario de la Facultad de Geografía e Historia de la Universidad de las Palmas de Gran Canaria, a review we have taken as sample, meets the international criteria for publication. We also attempt to make a series of suggestions which, if taken into consideration, may help to improve its quality as a publication allowing it to

  5. EVOLUCIÓN DE LA MORTALIDAD ATRIBUIBLE AL TABACO EN LAS ISLAS CANARIAS (1975-1994)

    OpenAIRE

    Luis M Bello Luján; Pedro Lorenzo Ruano; Mercedes Gil Muñoz; Pedro Saavedra Santana

    2001-01-01

    Fundamento: El objetivo de este trabajo es describir la mortalidad atribuible al consumo de tabaco en las Islas Canarias durante el período 1975-1994. Método: Las defunciones por edad, sexo y causa desde 1975 a 1994 se obtuvieron del Instituto Nacional de Estadística (Movimiento Natural Población). A partir de las Encuestas de Salud de España y Canarias se tomaron los porcentajes de nunca fumadores, fumadores y ex-fumadores de la población canaria por edad y sexo. Los ...

  6. Crecimiento económico, integración y cohesión territorial en Canarias (1991-2001

    Directory of Open Access Journals (Sweden)

    Ramón Díaz Hernández

    2013-11-01

    Full Text Available El presente trabajo se enmarca dentro del interés de la Geografía Humana por el estudio de los equilibrios y desequilibrios territoriales en las distintas vertientes sociales y económicas como manifestación externa de homogeneidad territorial espacial o de su ausencia. Para su objetivación se toman en consideración diferentes indicadores (percepción de rentas, crecimiento demográfico, paro y ocupación, índice de envejecimiento, radicación de industrias, etc. que son ya clásicos en este tipo de ensayos. En Canarias, territorio atlántico alejado y fragmentado en islas, la cuestión de los desequilibrios no es asunto baladí ni mucho menos, porque está en juego permanentemente la legitimación de su integridad regional y los beneficios derivados de la integración europea, además del principio de igualdad de oportunidades en la deseada homologación de derechos.The present study is based on the interest in human geography, by the study of the stable and unstable territories of the diffrent social and economic walks of life as an outside demostration of the special homogeneity territories or its absence. As its objetive it takes into consideration diffrent points (true income, demographic growth, employment and unemployment, index on the old population, long established, radication industries, etc. that are already classics in this type of study. In the Canary Islands, atlantic territory, distant and divided into islands, the question of the disorder however is not an insignificant matter, because it is permanently risking the lejitimation of its integral region and the benifits obtained from the european integration, also the principle of iqual opportunities and the wish of homologetion rights.

  7. [The ear of a boxer from Canary islands].

    Science.gov (United States)

    Navarrete, M L; Benítez, J; Vasallo, J R; Osorio, A; Perera, J; Cuyás, J M

    1998-01-01

    The canary fight is a sport with traditional character deeply-rooted in Spain. The pinna rubbing by bodies contact in hand-to-hand combat produce a typical deformity. We present this pathology not only due to its specific pathogenesis but also as part of the cultural patrimony of Canary Islands (Fortunate Islands).

  8. Stygofauna of the Canary Islands, 9. The amphipod genus Pseudoniphargus (Crustacea) in the Canary Islands

    NARCIS (Netherlands)

    Stock, Jan H.

    1988-01-01

    Pseudoniphargus was known from inland stygohabitats in the Iberian peninsula, the Azores, Madeira, N.W. Africa, and Bermuda, but not from the Canary Islands. Systematic sampling in six of the seven larger islands of the latter archipelago has revealed the presence of the genus in Tenerife (4

  9. The Continuous Presence of News in the Ballad Tradition of the Canary Islands

    Directory of Open Access Journals (Sweden)

    Monroy Caballero, Andrés

    2008-12-01

    Full Text Available The author approaches the textual study of the oral tradition of ballads in the Canary Islands by focusing on the imprints left on these compositions by the events of History, Big and Small. Known as “Noticierismo”, this expression of popular culture —that of inserting historical news in such texts— has existed in the Islands for quite a long time. By considering the different ballad genres and revealing that noticierismo can be traced back to the late Middle Ages, he argues that its primary function, both in the Islands and elsewhere in the Spanish-speaking world, especially with regard to the 18th Century-like compositions, has been that of spreading the word about those events from the past which most impressed its practitioners. From one generation to the next, the centuries-old tradition has kept the memory of such events alive to the present day.

    Nos acercamos al estudio textual del romancero recogido en la tradición oral de Canarias a través de las huellas que la pequeña o gran historia ha ido perpetuando en estas composiciones, como reflejo de la continuación de la práctica del noticierismo romancístico desde finales de la Edad Media hasta la actualidad. Mediante el análisis de los géneros romancísticos y la persistencia de esta tendencia noticiera en los textos, demostramos que el romancero noticiero en Canarias —y en el mundo hispánico en general— ha estado muy activo (sobre todo en los pliegos dieciochescos, modernos y locales, con la función primordial de dar publicidad a aquellos acontecimientos que más impresionaron en una época pretérita y que se han mantenido vigentes hasta la actualidad gracias a la labor de conservación de sus transmisores.

  10. La defensa de Canarias contra asaltos aerotransportados en 1943

    OpenAIRE

    Juan José Díaz Benítez

    2004-01-01

    La tradicional indefensión naval de Canarias se vio agravada durante la II Guerra Mundial, cuando la ambiciosa política exterior española la expuso a un ataque aliado, al cual se intentó responder aprovechando de la mejor manera posible los escasos recursos disponibles. El plan de defensa contra ataques aerotransportados, redactado a finales de 1943, formó parte de este infructuoso esfuerzo, en un momento en el que ya no se cernía ninguna amenaza sobre el archipiélago. Pese al interés mostrad...

  11. Northernmost record of the pantropical portunid crab Cronius ruber in the eastern Atlantic (Canary Islands: natural range extension or human-mediated introduction?

    Directory of Open Access Journals (Sweden)

    José A. González

    2017-03-01

    Full Text Available The pantropical crab Cronius ruber (Lamarck, 1818 (Brachyura: Portunidae is recorded for the first time from the Canary Islands. Previously known from off Cape Verde Islands and Senegal, this is the northernmost record of the species in the eastern Atlantic Ocean. Crabs have been caught by means of a collecting small trap for sampling in shallow waters, and then identified by both morphological characters and DNA barcoding (16S. Cytochrome c oxidase I partial sequence has been obtained for this species for the first time. This relatively large and very aggressive crab species seems to be rapidly occupying both hard substrates (sublittoral caves and soft substrates (sand with seagrass meadow adjacent to shallow rocky bottoms, at depths between 2 and 10 m, in the warm southern waters of Gran Canaria Island. The reasons for this species’ occurrence are discussed herein. Among them, natural range extension may be a consequence of tropicalization in the eastern Atlantic. Also, a human-mediated introduction could be based on the heavy traffic of ships (ballast waters or oil platforms arriving at the Canary Islands from African countries and from Brazil in the last decade.

  12. Upgrated fuel from reed canary grass

    Energy Technology Data Exchange (ETDEWEB)

    Oravainen, H. [VTT Energy, Jyvaeskylae (Finland)

    1997-12-01

    Results described in this presentation are from a large EU-project - Development of a new crop production system based on delayed harvesting and system for its combined processing to chemical pulp and biofuel powder. This is a project to develop the use of Reed Canary Grass (Phalaris Arundinaceae) both for pulp industry and energy production. The main contractor of the project is Swedish University of Agricultural Sciences (coordinator), task coordinators are United Milling Systems A/S from Denmark, and Jaakko Poeyry Oy and VTT Energy from Finland In addition, there are partners from several countries participating in the project

  13. Fábrica para Frigo-Canarias, S.A. en Jinamar (Teide Gran Canaria – España

    Directory of Open Access Journals (Sweden)

    López Díaz, Luis

    1974-06-01

    Full Text Available This building is situated in Janamar (Telde, Las Palmas in Gran Canaria and to accomplish it the valuable experiences have been utilised that Frigo has collected from its other important factories, foreseeing possible enlargements, rational organization of the operational cycle and easy checking of the whole system of ducts. It has offices, wardrobes and staff diningroom, separate W.C.'s for ladies and gentlemen, fabrication zone, storage, maturation tanks, freezers, cold storage rooms, loading piers, etc. Mention should be made of the hyperbolic paraboloids of reinforced concrete that cover the storage house for cartonnage, for raw material and the big central bay as well as the steam kettle room in the shape of a revolving hyperboloid and glass cover.Este edificio está situado en Jinamar (Telde, Las Palmas de Gran Canaria, y para su organización se han recogido las valiosas experiencias que Frigo ha deducido de sus otras fábricas importantes, previendo posibles ampliaciones, organización racional del ciclo operativo y comodidad de control de todas las canalizaciones. Dispone de oficinas, vestuarios y comedor de empleados, aseos para ambos sexos, zona de fabricación, almacenes, tanques de maduración, congeladores, cámaras frigoríficas, muelles de carga, etc. Son de destacar los paraboloides hiperbólicos de hormigón armado que cubren el almacén de cartonaje, el de materias primas y la gran nave central, así como la cámara de calderas de vapor con forma de hiperboloide de revolución y cubierta de cristal.

  14. El verderón serrano (Serinus citrinella en Navarra : Parámetros fenológicos y movimientos migratorios

    Directory of Open Access Journals (Sweden)

    Daniel Alonso, Juan Arizaga

    2004-01-01

    Full Text Available Se estudiaron los parámetros fenológicos y se analizaron las recapturas de 1209 verderones serranos (Serinus citrinella capturados con red japonesa vertical en Navarra, durante el periodo 1997-2003. Se comprobó la presencia de la especie entre marzo y octubre y la reproducción entre marzo y agosto. Los datos indicaron una elevada dependencia por los bosques de coníferas durante el periodo reproductor. La principal área de invernada de la población estudiada podría localizarse en sistemas montañosos próximos a los Pirineos Orientales.

  15. Genetic characterization and molecular identification of the bloodmeal sources of the potential bluetongue vector Culicoides obsoletus in the Canary Islands, Spain

    Directory of Open Access Journals (Sweden)

    Martínez-de la Puente Josué

    2012-07-01

    Full Text Available Abstract Background Culicoides (Diptera: Ceratopogonidae biting midges are vectors for a diversity of pathogens including bluetongue virus (BTV that generate important economic losses. BTV has expanded its range in recent decades, probably due to the expansion of its main vector and the presence of other autochthonous competent vectors. Although the Canary Islands are still free of bluetongue disease (BTD, Spain and Europe have had to face up to a spread of bluetongue with disastrous consequences. Therefore, it is essential to identify the distribution of biting midges and understand their feeding patterns in areas susceptible to BTD. To that end, we captured biting midges on two farms in the Canary Islands (i to identify the midge species in question and characterize their COI barcoding region and (ii to ascertain the source of their bloodmeals using molecular tools. Methods Biting midges were captured using CDC traps baited with a 4-W blacklight (UV bulb on Gran Canaria and on Tenerife. Biting midges were quantified and identified according to their wing patterns. A 688 bp segment of the mitochondrial COI gene of 20 biting midges (11 from Gran Canaria and 9 from Tenerife were PCR amplified using the primers LCO1490 and HCO2198. Moreover, after selected all available females showing any rest of blood in their abdomen, a nested-PCR approach was used to amplify a fragment of the COI gene from vertebrate DNA contained in bloodmeals. The origin of bloodmeals was identified by comparison with the nucleotide-nucleotide basic alignment search tool (BLAST. Results The morphological identification of 491 female biting midges revealed the presence of a single morphospecies belonging to the Obsoletus group. When sequencing the barcoding region of the 20 females used to check genetic variability, we identified two haplotypes differing in a single base. Comparison analysis using the nucleotide-nucleotide basic alignment search tool (BLAST showed that both

  16. Andromonoecy and buzz pollination in Solanum species (Solanaceae endemic to the Canary Islands

    Directory of Open Access Journals (Sweden)

    Dupont, Yoko Luise

    2006-06-01

    Full Text Available We investigated the pollination and reproductive biology of two Canary Island endemics, Solanum vespertilio and S. lidii (Solanaceae. We measured male function (pollen development, female function (fruit initiation and spatial arrangement of reproductive parts within flowers and inflorescences. Furthermore, we observed flower visitors and monitored visitation rates. Both species of Solanum display andromonoecy: Longstyled flowers are functionally hermaphrodite and borne proximally on the inflorescences, while short-styled flowers are functionally male and borne distally on inflorescences. Large bees capable of buzzing were the main flower visitors. In particular, the endemic Canarian bumblebee, Bombus terrestris canariensis, was a frequent visitor and pollen vector of S. vespertilio.Se estudiaron la polinización y biología reproductiva de dos especies endémicas de las Islas Canarias: Solanum vespertilio y S. lidii (Solanaceae. Se midieron la función masculina (desarrollo polínico, la función femenina (iniciación de fruto y la disposición espacial de los órganos reproductivos, tanto en las flores como en las inflorescencias. Se registraron además los visitantes de las flores y su frecuencia. Ambos Solanum son andromonoicos: las flores con estilo largo son funcionalmente hermafroditas y proximales en las inflorescencias, mientras que las flores con estilo corto son funcionalmente masculinas y distales en la inflorescencia. Los visitantes más asiduos fueron grandes abejas y abejorros zumbadores. El abejorro endémico Bombus terrestris canariensis, en particular, fue un visitante frecuente y un vector de polen para S. vespertilio.

  17. [Spinal cord injuries resulting from diving accidents in the Canary Islands].

    Science.gov (United States)

    Bárbara-Bataller, Enrique; Méndez-Suárez, José Luis; Alemán-Sánchez, Carolina; Sánchez-Enríquez, Jesús; Sosa-Henríquez, Manuel

    Diving accidents is one of the leading causes of spinal cord injury after falls and car accidents. The objective of this study was to determine the epidemiological and clinical characteristics of these patients in our setting to better prevent these injuries. We performed a retrospective, descriptive study of patients who have suffered from a traumatic spinal cord injury after a diving accident in the Canary Islands, Spain from 2000 to 2014. These patients were admitted to the Spinal Cord Unit of Hospital Universitario Insular de Gran Canaria. Of the 264 patients admitted to our unit for acute traumatic spinal cord injury, 23 (8.7%) cases were due to diving. Grouping the patients into 5years periods, 56% of the injuries occurred in 2000-2005, 17% in 2006-2010 and 26% in 2011-2014. All patients were male, with a mean age of 29years. Approximately 65% were under 30years. A total of 22/23 patients had a fracture and injury most commonly occurred to the C5 vertebra. Burst fractures were the most common. A total of 86% of cases underwent surgery. All the spinal cord injuries were cervical, with C6 being the neurological level most often affected. A total of 65% of spinal cord injuries were complete injuries. Spinal cord injury secondary to diving accidents is the third leading cause of traumatic spinal cord injury in our setting. It affects young males and the most common clinical presentation is a complete cervical spinal cord injury. Given the irreversible nature of the injury, prevention, aimed mainly at young people, is of great importance. Copyright © 2017 Sociedad Española de Neurocirugía. Publicado por Elsevier España, S.L.U. All rights reserved.

  18. Digger wasp fauna (Insecta, Hymenoptera, Sphecidae, Crabronidae of La Palma (Canary Islands - a survey with description of a new species

    Directory of Open Access Journals (Sweden)

    Ljubomirov, T.

    2008-12-01

    Full Text Available Asurvey of the digger wasp fauna of La Palma (Canary Islands is made. Eleven species are confirmed as present and five of them –Liris nigricans nigricans (Walker, 1871, Miscophus eatoni E. Saunders, 1903, Tachysphex nitidus (Spinola, 1806, Solierella insidiosa de Beaumont, 1964, and Nitela laevigata sp. n.– are recorded for the first time for the fauna of La Palma. A brief evaluation of the digger wasp species richness of La Palma is provided.

    Se presenta un estudio de la fauna de Crabronidae y Sphecidae de la isla de La Palma (Islas Canarias. Se considera probada la presencia de once especies, cinco de las cuales –Liris nigricans nigricans (Walker, 1871, Miscophus eatoni E. Saunders, 1903, Tachysphex nitidus (Spinola, 1806, Solierella insidiosa de Beaumont, 1964 y Nitela laevigata sp. n.– se registran por vez primera para la fauna de La Palma. Se adjunta una breve evaluación de la riqueza específica de ambas familias en la isla.

  19. Canary Island Date Palm - Orange Co. [ds349

    Data.gov (United States)

    California Department of Resources — This dataset provides the known distribution of Canary Island date palm (Phoenix canariensis) in southern Orange County. The surveys were conducted from May to June,...

  20. Volcano-structure of El Hierro (Canary Islands)

    National Research Council Canada - National Science Library

    Becerril, L; Galve, J.P; Morales, J.M; Romero, C; Sánchez, N; Martí, J; Galindo, I

    2016-01-01

    The first complete volcano-structural map of El Hierro (Canary Islands, Spain) has been developed in order to provide a tool for volcano-tectonic analyses and volcanic hazard evaluation on the island...

  1. Epigean freshwater Gammaridae (Crustacea, Amphipoda) from La Gomera (Canary Islands)

    NARCIS (Netherlands)

    Beyer, Gabriele; Stock, Jan H.

    1994-01-01

    Description of two new species of freshwater amphipods from La Gomera (Canary Islands), both found in the higher parts of the island: Chaetogammarus chaetocerus n. sp. and Rhipidogammarus gomeranus n. sp. Both species have distinct Afro- Iberian relationships.

  2. Aviary: Distributed, Tamper-Proof, Per-User Warrant Canaries

    OpenAIRE

    Bose-Kolanu, Abhishek

    2016-01-01

    Governments routinely claim the power to subject individuals to secret investigation, forcing technology Service Providers to divulge User data without notification. Warrant canaries invert the notification problem by telling a User each time a Service Provider has not received a secret request for their data. Current canaries suffer from non-standardization, poor granularity, and brittleness in the face of attacks, leading the Electronic Frontier Foundation and Berkman Center to discontinue ...

  3. Anomalous changes of diffuse CO_{2} emission and seismic activity at Teide volcano, Tenerife, Canary Islands

    Science.gov (United States)

    García-Hernández, Rubén; Melián, Gladys; D'Auria, Luca; Asensio-Ramos, María; Alonso, Mar; Padilla, Germán D.; Rodríguez, Fátima; Padrón, Eleazar; Barrancos, José; García-Merino, Marta; Amonte, Cecilia; Pérez, Aarón; Calvo, David; Hernández, Pedro A.; Pérez, Nemesio M.

    2017-04-01

    Tenerife (2034 km2) is the largest of the Canary Islands and hosts four main active volcanic edifices: three volcanic rifts and a central volcanic complex, Las Cañadas, which is characterized by the eruption of differentiated magmas. Laying inside Las Cañadas a twin stratovolcanoes system, Pico Viejo and Teide, has been developed. Although there are no visible gas emanations along the volcanic rifts of Tenerife, the existence of a volcanic-hydrothermal system beneath Teide volcano is suggested by the occurrence of a weak fumarolic system, steamy ground and high rates of diffuse CO2 degassing all around the summit cone of Teide. Soil CO2 efflux surveys have been performed at the summit crater of Teide volcano since 1999, to determine the diffuse CO2 emission from the summit crater and to evaluate the temporal variations of CO2 efflux and their relationships with seismic-volcanic activity. Soil CO2 efflux and soil temperature have been always measured at the same 38 observation sites homogeneously distributed within an area of about 6,972 m2 inside the summit crater. Soil CO2 diffuse effluxes were estimated according to the accumulation chamber method by means of a non-dispersive infrared (NDIR) LICOR-820 CO2 analyzer. Historical seismic activity in Tenerife has been characterized by low- to moderate-magnitude events (M <2.5), and most of the earthquake's epicenters have been clustered in an offshore area SE of Tenerife. However, very few earthquakes have occurred in other areas, including Teide volcano. At 12:18 of January 6, 2017, the Canary Seismic Network belonged to the Instituto Volcanológico de Canarias (INVOLCAN) registered an earthquake of M 2.5 located in the vertical of Teide volcano with a depth of 6.6 km. It was the strongest earthquake located inside Cañadas caldera since 2004. Between October 11 and December 13, 2016, a continuous increase on the diffuse CO2 emission was registered, from 21.3 ± 2.0 to 101.7 ± 20.7 t d-1, suggesting the occurrence

  4. Temporal variability of mass transport across Canary Islands Channels

    Science.gov (United States)

    Marrero-Díaz, Ángeles; Rodríguez-Santana, Ángel; José Machín, Francisco; García-Weil, Luis; Sangrà, Pablo; Vélez-Belchí, Pedro; Fraile-Nuez, Eugenio

    2014-05-01

    The equatorward flowing Canary Current (CC) is the main feature of the circulation in the Canary Islands region. The CC flow perturbation by the Canary Islands originate the Canary Eddy Corridor which is the major pathway for long lived eddies in the subtropical North Atlantic (Sangrà et al., 2009, DSR). Therefore the variability of the CC passing through the Canary Archipelago will have both local and regional importance. Past studies on the CC variability trough the Canary Islands point out a clearly seasonal variability (Fraile-Nuez et al, 2010 (JGR); Hernández-Guerra et al, 2002 (DSR)). However those studies where focused on the eastern islands channels missing the variability through the western island channels which are the main source of long lived eddies. In order to fill this gap from November 2012 until September 2013 we conducted trimonthly surveys crossing the whole islands channels using opportunity ships (Naviera Armas Ferries). XBT and XCTD where launched along the cross channels transects. Additionally a closed box circling the Archipelago was performed on October 2013 as part of the cruise RAPROCAN-2013 (IEO) using also XBT and XCTD. Dynamical variables where derived inferring salinity from S(T,p) analytical relationships for the region updated with new XCTD data. High resolution, vertical sections of temperature, potential density, geostrophic velocity and transport where obtained. Our preliminary results suggest that the CC suffer a noticeable acceleration in those islands channels where eddy shedding is more frequent. They also indicate a clearly seasonal variability of the flows passing the islands channels. With this regard we observed significant differences on the obtained seasonal variability with respect the cited past studies on the eastern islands channel (Lanzarote / Fuerteventura - Africa coast). This work was co-funded by Canary Government (TRAMIC project: PROID20100092) and the European Union (FEDER).

  5. Temperatura de emplazamiento de las ignimbritas Roque Nublo (Gran Canaria, Islas Canarias mediante técnicas paleomagneticas

    Directory of Open Access Journals (Sweden)

    Mangas, J.

    1994-04-01

    Full Text Available The main characteristic of the Pliocene volcanic phase of Gran Canaria. the Cycle 11 or Roque Nublo. is the building of a central stratovolcano. probably reaching more than 2.500 m aboye sea level. Among the most relevant deposits associated to this volcanic edifice are the pyroclastic breccia-type deposits. generally known as «Roque Nublo agglomerates or breccias». These deposits have been gene rally interpreted as pyroclastic flows. However, their emission. transport and depositional mechanisms are hitherto poorly understood. In the present work. the analysis of the paleomagnetic characteristics of the lithic and juvenile fragments and the matrix of these pyroclastic deposits have provide sorne important constraints in their evolution and depositional temperatures. The Roque Nublo ignimbrites seem to have been deposited at temperatures below 300 ºC. In such circumstances. hot water originated by the condensation of interstitial water vapor reacted with the cineritic glass fraction, giving place to zeolite neomineralizations. The relatively fast cooling experimented by the ignimbrites after their emission. as deduced from the paleomagnetic analysis, can be explained by the high proportion of lithics and the intcraction of water as an important factor in the triggering of the eruptions in which the ignimbrites were originated.En Gran Canaria, el Ciclo 11 o Roque Nublo. de edad Pliocena. se caracteriza por la construcción de un estratovolcán que pudo alcanzar al menos 2.500 m de altura. Entre los materiales emitidos por este edificio volcánico destacan unos depósitos piroclásticos de aspecto brechoide. generalmente conocidos como «aglomerados o brechas Roque Nublo». Aunque la mayoría de los autores que han estudiado estos depósitos han coincidido en asociarlos a coladas piroclásticas (por consiguiente. son depósitos ignimbríticos. no se conocían bien sus mecanismos de emisión. transporte y depósito. En este trabajo se

  6. Flesh color inheritance and gene interactions among canary yellow, pale yellow and red watermelon

    Science.gov (United States)

    Two loci, C and i-C were previously reported to determine flesh color between canary yellow and red watermelon. Recently LCYB was found as a color determinant gene for canary yellow (C) and co-dominant CAPS marker was developed to identify canary yellow and red alleles. Another report suggested th...

  7. Long-range order in canary song.

    Science.gov (United States)

    Markowitz, Jeffrey E; Ivie, Elizabeth; Kligler, Laura; Gardner, Timothy J

    2013-01-01

    Bird songs range in form from the simple notes of a Chipping Sparrow to the rich performance of the nightingale. Non-adjacent correlations can be found in the syntax of some birdsongs, indicating that the choice of what to sing next is determined not only by the current syllable, but also by previous syllables sung. Here we examine the song of the domesticated canary, a complex singer whose song consists of syllables, grouped into phrases that are arranged in flexible sequences. Phrases are defined by a fundamental time-scale that is independent of the underlying syllable duration. We show that the ordering of phrases is governed by long-range rules: the choice of what phrase to sing next in a given context depends on the history of the song, and for some syllables, highly specific rules produce correlations in song over timescales of up to ten seconds. The neural basis of these long-range correlations may provide insight into how complex behaviors are assembled from more elementary, stereotyped modules.

  8. Los bienes de interés cultural de Gáldar (Canarias y el conjunto histórico “Plaza de Santiago” (1981-2006

    Directory of Open Access Journals (Sweden)

    Juan Sebastián López García

    2013-10-01

    Full Text Available En 1981, hace veinticinco años, la zona central de Gáldar fue declarada “Conjunto Histórico Artístico” con la denominación de Plaza de Santiago. Sin embargo no era el primer bien cultural que obtenía una distinción de este tipo, ya que Gáldar había sido pionera en 1949 con el yacimiento de El Agujero y La Guancha, primero de los de carácter arqueológico declarado en Canarias, al que seguiría en 1972 la Cueva Pintada. Hasta la década de los setenta prevalecieron los bienes arqueológicos, situación que se modificó en las dos últimas décadas del siglo XX después del reconocimiento de la Plaza de Santiago y su entorno. Junto con edificaciones religiosas también se incluyeron ejemplos de arquitectura doméstica, completándose con algunos yacimientos prehispánicos. Una particular circunstancia fue la declaración en 1993 del pago de Barranco Hondo de Abajo, lo que convertía a Gáldar en el primer municipio de Canarias que contaba con dos conjuntos históricos, siendo éste a la vez el primero de la comunidad autonóma con características rurales. De la relación de los declarados, si exceptuamos la mayoría de los de carácter arqueológico, buena parte son urbanos. Una característica es que se incluyen categorías variadas, incluyendo la existencia de una zona arqueológica junto a un conjunto histórico y varios monumentos (de arquitectura religiosa y doméstica. Este hecho es lógico si se tiene en cuenta la particularidad de Gáldar y su condición de núcleo histórico de superposición.Twenty five years ago, in 1981, the central zone of Galdar was declared an "Historic Artistic Site" with the name of Plaza de Santiago. But this was not the first cultural asset to obtain a distinction of this kind, as Galdar pioneered protection of this kind with the El Agujero and La Guancha site, the first archaeological site declared in the Canary Islands, followed by La Cueva Pintada, in 1972. Archaeological assets prevailed up

  9. La segmentación del gasto turístico: el caso de Canarias

    Directory of Open Access Journals (Sweden)

    Raquel Martín Rivero

    2017-01-01

    Full Text Available El presente trabajo tiene como objetivo principal realizar un análisis del comportamiento de los turistas que llegan a Canarias en función de los distintos niveles de gasto medio diario que realizan en origen. Dicho análisis se efectúa utilizando la información suministrada por la Encuesta de Gasto Turísticollevada a cabo por el Instituto Canario de Estadística del Gobierno de Canarias (ISTAC.El análisis se basa en la realización de una descomposición de la estructura de los turistas que visitan Canarias a través de un análisis cluster. La variable por la que se rige la segmentación es el gasto medio en origen por persona y día y se aplica a la totalidad de turistas que llegaron a Canarias durante el año 2014. Asimismo, a través de la utilización de esta metodología se podrá comprobar la capacidad de discriminación que tienen algunas variables frente a otras que apenas aportan diferencias en los resultados.

  10. Las remesas indianas en Gran Canaria en el primer cuarto del siglo XVII

    Directory of Open Access Journals (Sweden)

    Elisa TORRES SANTANA

    2009-12-01

    Full Text Available El estudio de las remesas indianas, del dinero que bien en efectivo o en joyas afluía a la isla de Gran Canaria procedente del continente americano, ha sido un problema que ha preocupado en gran medida a los historiadores canarios. Sin embargo, su análisis siempre ha resultado problemático, por varias razones.

  11. Canarias y sus volcanes 1,2 (Libro para niños)

    OpenAIRE

    Carracedo, Poly

    2008-01-01

    Los Volcanes de Canarias para niños. Libro didáctico tipo cómic especialmente diseñado para un público infantil. Los dibujos fueron realizados por la autora cuando tenía 10 años sobre un guión elaborado por Juan Carlos Carracedo y Vicente Araña.

  12. Evolución de la mortalidad atribuible al tabaco en las Islas Canarias (1975-1994)

    OpenAIRE

    Bello Luján Luis M; Lorenzo Ruano Pedro; Gil Muñoz Mercedes; Saavedra Santana Pedro; Serra Majem Lluis

    2001-01-01

    Fundamento: El objetivo de este trabajo es describir la mortalidad atribuible al consumo de tabaco en las Islas Canarias durante el periodo 1975-1994. Método: Las defunciones por edad, sexo y causa desde 1975 a 1994 se obtuvieron del Instituto Nacional de Estadística (Movimiento Natural Población). A partir de las Encuestas de Salud de España y Canarias se tomaron los porcentajes de nunca fumadores, fumadores y ex-fumadores de la población canaria por edad y sexo. Los riesgos relativos de mue...

  13. GRANADA, CANARIAS, AMÉRICA: EL USO DE PRÁCTICAS ATERRORIZANTES EN LA PRAXIS DE TRES CONQUISTAS, 1482-1557

    Directory of Open Access Journals (Sweden)

    ANTONIO ESPINO LÓPEZ

    2012-12-01

    Full Text Available Nuestro propósito en este artículo es señalar algunos rasgos afines en los procesos de conquista de Granada, Canarias y América, remarcando cómo el comportamiento militar de los hispanos se basó notablemente en el uso de toda una nómina de prácticas aterrorizantes herederas de los modelos coercitivos propios del imperialismo romano. Por otro lado, esta reflexión sobre la problemática debe conducirnos a otras nuevas, señalando, más que las limitaciones de las crónicas a la hora de abordar tales cuestiones, cómo afrontan estas la narración de la violencia y remarcando una vez más la necesidad de huir de la cosmética de la conquista hispana de las Indias.The aim of this article is to call attention to the related characteristics in the conquest process of Granada, the Canaries and America, highlighting Spanish military behavior, which was mainly based on a wide range of terrifying practices taken from coercive models of the Roman Empire. This analysis of the problem should lead us to new problems, which show us how to deal with the accounts of violence, instead of focusing on the limitations of the chronicles themselves. This in turn also emphasizes the need to escape from the cosmetic image of the Spanish conquest of the Indies.

  14. Plant invasion and speciation along elevational gradients on the oceanic island La Palma, Canary Islands

    DEFF Research Database (Denmark)

    Steinbauer, Manuel; Irl, Severin David Howard; González-Mancebo, Juana Maria

    2017-01-01

    systematically along three elevational gradients covering large parts of the climatic range of La Palma, Canary Islands. Results: Species richness was negatively correlated with elevation, while the percentage of Canary endemic species showed a positive relationship. However, the percentage of Canary...... from high elevations indicating directional ecological filtering. Increasing ecological isolation with elevation drives diversification and thus increased percentages of Canary endemics. The best preserved eastern transect, including mature laurel forests is an exception. The high percentage of Canary......-Madeira endemics indicates the cloud forest’s environmental uniqueness – and thus ecological isolation - beyond the Macaronesian islands....

  15. Construct exploit constraint in crash analysis by bypassing canary

    Science.gov (United States)

    Huang, Ning; Huang, Shuguang; Huang, Hui; Chang, Chao

    2017-08-01

    Selective symbolic execution is a common program testing technology. Developed on the basis of it, some crash analysis systems are often used to test the fragility of the program by constructing exploit constraints, such as CRAX. From the study of crash analysis based on symbolic execution, this paper find that this technology cannot bypass the canary stack protection mechanisms. This paper makes the improvement uses the API hook in Linux. Experimental results show that the use of API hook can effectively solve the problem that crash analysis cannot bypass the canary protection.

  16. Upgraded fuel from reed canary grass

    Energy Technology Data Exchange (ETDEWEB)

    Heiskanen, V.P.

    1995-12-31

    The feasibility of RCG for commercial utilization depends primarily on its applicability for pulp production and its use in energy production will be based on the residue that will be available after extracting the pulp fraction of the RCG. Roughly 20 ..30% of the material will be available for energy production purposes. However, the percentage may be higher/lower depending on the quality standards of the pulp fiber material. The harvesting period has a significant effect on the fuel characteristics of RCG. For instance the contents of N, S, Cl, K are clearly lower if the RCG is harvested in the spring (delayed) instead of summer/autumn. These elements affect significantly overall emission formation and ash behaviour and its melting temperature. The combustion related research in this project has been focused on the spring-harvested RCG. The project aims to evaluate the feasibility of delayed harvested RCG for energy production. In order to reach this goal, the following combustion methods will be tested and studied: combustion of pelletized RCG; gasification; combustion of pulverized RCG. In addition, pelletizing, reactivity and NO conversion of pulverized RCG will be studied. The research described here is a part of `Reed Canary Grass` project (in AIR programme). The contractors of the project are Swedish University of Agricultural Sciences (coordinator), United Milling Systems from Denmark, Jaakko Poeyry Oy and VTT Energy. In addition, there are partners from several countries participating in the project. The project has been divided in five tasks, VTT Energy being responsible for combustion related task `Upgraded fuel` that includes the research topics discussed in this paper

  17. Bird pollination of Canary Island endemic plants

    Science.gov (United States)

    Ollerton, Jeff; Cranmer, Louise; Stelzer, Ralph J.; Sullivan, Steve; Chittka, Lars

    2009-02-01

    The Canary Islands are home to a guild of endemic, threatened bird-pollinated plants. Previous work has suggested that these plants evolved floral traits as adaptations to pollination by flower specialist sunbirds, but subsequently, they appear to have co-opted generalist passerine birds as sub-optimal pollinators. To test this idea, we carried out a quantitative study of the pollination biology of three of the bird-pollinated plants, Canarina canariensis (Campanulaceae), Isoplexis canariensis (Veronicaceae) and Lotus berthelotii (Fabaceae), on the island of Tenerife. Using colour vision models, we predicted the detectability of flowers to bird and bee pollinators. We measured pollinator visitation rates, nectar standing crops as well as seed-set and pollen removal and deposition. These data showed that the plants are effectively pollinated by non-flower specialist passerine birds that only occasionally visit flowers. The large nectar standing crops and extended flower longevities (>10 days) of Canarina and Isoplexis suggests that they have evolved a bird pollination system that effectively exploits these low frequency non-specialist pollen vectors and is in no way sub-optimal. Seed set in two of the three species was high and was significantly reduced or zero in flowers where pollinator access was restricted. In L. berthelotii, however, no fruit set was observed, probably because the plants were self-incompatible horticultural clones of a single genet. We also show that, while all three species are easily detectable for birds, the orange Canarina and the red Lotus (but less so the yellow-orange Isoplexis) should be difficult to detect for insect pollinators without specialised red receptors, such as bumblebees. Contrary to expectations if we accept that the flowers are primarily adapted to sunbird pollination, the chiffchaff ( Phylloscopus canariensis) was an effective pollinator of these species.

  18. La erupción submarina de La Restinga en la isla de El Hierro, Canarias: Octubre 2011-Marzo 2012

    Directory of Open Access Journals (Sweden)

    Perez-Torrado, F. J.

    2012-06-01

    Full Text Available The first signs of renewed volcanic activity at El Hierro began in July 2011 with the occurrence of abundant, low-magnitude earthquakes. The increasing seismicity culminated on October 10, 2011, with the onset of a submarine eruption about 2 km offshore from La Restinga, the southernmost village on El Hierro. The analysis of seismic and deformation records prior to, and throughout, the eruption allowed the reconstruction of its main phases: 1 ascent of magma and migration of hypocentres from beneath the northern coast (El Golfo towards the south rift zone, close to La Restinga, probably marking the hydraulic fracturing and the opening of the eruptive conduit; and 2 onset and development of a volcanic eruption indicated by sustained and prolonged harmonic tremor whose intensity varied with time. The features monitored during the eruption include location, depth and morphological evolution of the eruptive source and emission of floating volcanic bombs. These bombs initially showed white, vesiculated cores (originated by partial melting of underlying pre-volcanic sediments upon which the island of El Hierro was constructed and black basanite rims, and later exclusively hollow basanitic lava balloons. The eruptive products have been matched with a fissural submarine eruption without ever having attained surtseyan explosiveness. The eruption has been active for about five months and ended in March 2012, thus becoming the second longest reported historical eruption in the Canary Islands after the Timanfaya eruption in Lanzarote (1730-1736. This eruption provided the first opportunity in 40 years to manage a volcanic crisis in the Canary Islands and to assess the interpretations and decisions taken, thereby gaining experience for improved management of future volcanic activity. Seismicity and deformation during the eruption were recorded and analysed by the Instituto Geográfico Nacional (IGN. Unfortunately, a lack of systematic sampling of erupted

  19. Radioactive content in groundwater in the island of Tenerife (Canary Islands); Contenido radioactivo en aguas en aguas subterraneas de la Isla de Tenerifie (Canarias)

    Energy Technology Data Exchange (ETDEWEB)

    Lopez-Perez, M.; Duarte-Rodriguez, X.; Rodriguez-Perestelo, N.; Catalan-Acosta, A.; Fernandez- De Aldecoa, J. C.; Hernandez Armas, J.

    2013-07-01

    At present the groundwater in Tenerife is still the main resource to meet the demands of all kinds. Currently, due to the salt content, groundwater is treated using reversible electrodialysis desalination systems before drinking it. (Author)

  20. Gamma emitting radionuclides in fruits and vegetables produced in the Canary Islands: domestic consequences; Radionuclidos emisores gamma en frutas y hortalizas producidas en Canarias: consecuencias dosimetricas

    Energy Technology Data Exchange (ETDEWEB)

    Triguero-Perez, M.; Duarte-Rodriguez, X.; Lopez-Perez, M.; Hernandez-Armas, J.

    2011-07-01

    Determine the possible effects due to ingestion of radionuclides that can be found in health food is of interest from the viewpoint of radiation protection of the population. these determinations and analysis of the consequences on the health of people and jobs has led to studies that have had consequences in the form of rules to follow and values have to be attended to limit dictated by national and international agencies. (Author)

  1. Ion exchange for Boiler Feedwater in the Canary Islands; Intercambio ionico para el agua de las claderas en las Islas Canarias

    Energy Technology Data Exchange (ETDEWEB)

    Gonzalez-Bauza, J. C.; Pena, J. A.; Susial, P. [Universidad de Las Palmas de Gran Canarias (Spain)

    2000-07-01

    The construction of a tower mixed bed ion exchange is described and tested in an experimental installation, around which industrial raw water to different boilers was circulated. The experimental data obtained with the feed inlet water coming from well and desalination plant and deionized water are detailed and analyzed. The results obtained show that deionization is more convenient procedure than others and economically viable in boiler plants. (Author) 17 refs.

  2. Reed canary grass: from production to end use

    Science.gov (United States)

    Reed canary grass (Phalaris arundinacea - RCG) is a lignocellulosic perennial crop that is carbon-efficient in terms of sequestration and nutrient recycling, and grows well on land that is marginal for food and feed production. Therefore, it can help deliver sustainable bioenergy without impacting f...

  3. Fishing methods for sustainable shrimp fisheries in the Canary ...

    African Journals Online (AJOL)

    During the past 20 years, experimental cruises have been conducted around the Canary Islands (North-West Africa) to investigate the biodiversity of the deep-sea ecosystem and to explore new fisheries resources. Although pandalid shrimps were shown to be very abundant in this region, information is lacking regarding ...

  4. The Canary Current system off the Iberian Peninsula and North ...

    African Journals Online (AJOL)

    spamer

    The Canary Current system off the Iberian Peninsula and North-West Africa, the Humboldt Current system off western South America, the California Current system off the western United States, and the. Benguela Current system off the west coast of southern. Africa are the four major eastern boundary current regions.

  5. (Ceramiales, Rhodophyta) from the Canary Islands, eastern Atlantic ...

    African Journals Online (AJOL)

    The genus Osmundea is a strongly supported monophyletic group within the Laurencia complex and shows a disjunct distribution occurring in the North-East and South-West Pacific, the Indian and Atlantic oceans and the Mediterranean Sea. Its phenotypic plasticity on the Canary Islands may be the result of the high ...

  6. Study of the infrastructures and the fishing power in Gran Canaria

    OpenAIRE

    Morales-Malla, David

    2011-01-01

    Máster en Gestión Sostenible de Recursos Pesqueros [EN] In Gran Canaria, the fisheries sector is basically artisan, characterized by small size vessels and daily fishing days. This sector leads paired infrastructures in the ports that have undergone major changes in recent years, from being small dykes or beaches and carries out the activities manually to have ports and machinery devoted to the fisheries sector. This expansion has required large investments, not only for the construction b...

  7. Ley 3/1990, de 22 de febrero, de Patrimonio Documental y Archivos de Canarias

    OpenAIRE

    Canarias (Diócesis). Obispo (1761-1768: Francisco Javier Delgado y Venegas).

    1990-01-01

    La presente Ley se propoene la custodia,conservación, inventario y difusión del Patrimonio Documental de Canarias. Determina también los documentos y archivos sujetos a protección, ya sean de titularidad pública o privada, con las exigencias del interés general, en orden a la conservación, defensa, acceso y difusión de los mismos

  8. Geophysical imaging of the lacustrine sediments deposited in the La Calderilla Volcanic Caldera (Gran Canaria Island, Spain) for paleoclimate research

    Science.gov (United States)

    Himi, Mahjoub; Rodríguez-González, Alejandro; Criado, Constantino; Tapias, Josefina C.; Ravazzi, Cesare; Pérez-Torrado, Francisco; Casas, Albert

    2016-04-01

    The discovery of well-preserved maar structures is important not only for studying the eruptive activity and formation of volcanoes, but also for paleoclimate research, since laminated maar lake sediments may contain very detailed archives of climate and environmental history. Maars are a singular type of volcanic structure generated by explosive phreatomagmatic eruptions as a result of interaction between rising magma and groundwater. This kind of structures are characterised by circular craters, often filled with water and/or lacustrine sediments and surrounded by a ring of pyroclastic deposits.Recently a borehole was drilled at the bottom of La Calderilla volcanic complex which penetrated about 8.7 m in its sedimentary sequence and paleobotanical study has supplied the first evidence of paleoenvironmental evolution during the Holocene on the Gran Canaria Island. This survey, however, did not penetrate into the substrate because the total thickness of the sedimentary fill was unknown. Since the age of formation of La Calderilla volcanic complex based on K/Ar dating is about 85,000 years (Upper Pleistocene), the possibility of its sedimentary fill extends beyond of the Holocene is extremely attractive, since, for example, there are few paleoenvironmental data regarding how much the last glaciation that affected the Canary Islands. In these circumstances, the knowledge of the total thickness of the lacustrine sediments is crucial to design a deeper borehole in the next future. Therefore, the subsurface characterisation provided by geophysics is essential for determining thickness and geometry of the sedimentary filling. Multielectrode ERT method was used to obtain five 2-D resistivity cross-sections into La Calderilla volcanic caldera. An Iris Syscal Pro resistivity system with 48 electrodes connected to a 94 m long cable (2m electrode spacing) in Wenner-Schlumberger configuration for an investigation depth of about 20 m. Data quality (q heterogeneous can be

  9. Diet of common ravens on El Hierro, Canary Islands

    OpenAIRE

    Nogales, Manuel; Hernández, Elizabeth C.

    1997-01-01

    L dieta del cuervo (Corvus corax) en la isla de El Hierro, Islas Canarias, es omnívora. Aunque cinco zonas estudiadas no mostraron gran variación respecto al tipo de alimento, hubo considerables cambios cuantitativos. En los pastizales de Bascos (seco) y Jinama (húmedo) la dieta consistió básicamente de materia animal. Hubo invertebrados en abundancia en Jinama (frecuencia de aparición en egagrópilas = 84.8%) y restos de vertebrados en el de Bascos (60%). Desde el punto de vista estacional, l...

  10. Electrophysiological and morphological development of the inner ear in Belgian Waterslager canaries.

    Science.gov (United States)

    Brittan-Powell, Elizabeth F; Dooling, Robert J; Ryals, Brenda; Gleich, Otto

    2010-10-01

    Belgian Waterslager (BW) canaries have an inherited hearing loss due to missing and abnormal hair cells, but it is unclear whether the loss is congenital or developmental. We used auditory brainstem responses and scanning electron microscopy to describe the development of auditory sensitivity and hair cell abnormalities in BW and non-BW canaries. In both strains, adult ABR thresholds were higher than behavioral thresholds, but BW canaries exhibited higher thresholds than non-BW canaries across all frequencies. Immediately post-hatch, ABR thresholds and hair cell numbers were similar in both strains. Two weeks later, thresholds were significantly higher in BW canaries, and hair cell number progressively decreased as the birds aged. These data show that in BW canaries: the peripheral auditory system is functionally similar to non-BW canary from hatch to 2 weeks, ABR thresholds improve during this developmental period, actually becoming better than those of adults, but then worsen as the bird continues to age. Hair cell number and appearance is similar to non-BW canaries at hatch but progressively declines after 30 days of age. These data show that the hearing loss characteristic of BW canaries is, at least in part, developmental and is established by the time song learning begins.

  11. Circovirus inclusion bodies in intestinal muscle cells of a canary.

    Science.gov (United States)

    Rampin, T; Manarolla, G; Pisoni, G; Recordati, C; Sironi, G

    2006-08-01

    Multiple cytoplasmic inclusion bodies were observed in the intestinal smooth muscle cells of an adult canary from an aviary with a history of high mortality (50%) both in adult and young birds. Grossly, a mild enteritis was the only lesion appreciable. Smears of the proventricular contents contained a few megabacteria (Macrorhabdus ornithogaster). The intestinal inclusions were found in very high numbers in all parts of the tract examined. They appeared round to oval, amphophilic and hyaline in sections stained with haematoxylin and eosin, and magenta with Feulgen stain. Inclusions of the same type were occasionally detectable in the wall of a few splenic and pancreatic arteries. No inclusions or lesions were seen in the other organs examined. Transmission electron microscopy of the intestinal wall revealed circovirus-like particles either in paracrystalline arrays or loose arrangements, mostly within the cytoplasm of the intestinal muscule cells. Polymerase chain reaction amplification and sequence analysis confirmed infection with canary circovirus.

  12. New Oxidized Zoanthamines from a Canary Islands Zoanthus sp.

    Directory of Open Access Journals (Sweden)

    Francisco Cen-Pacheco

    2014-10-01

    Full Text Available Three new norzoanthamine-type alkaloids, named 2-hydroxy-11-ketonorzoan thamide B (1, norzoanthamide B (2 and 15-hydroxynorzoanthamine (3, were isolated from Zoanthus sp. specimens collected at the Canary Islands. Their structures were determined by interpretation of NMR and HR-ESIMS data. Relative configurations of their chiral centers were proposed on the basis of ROESY spectra and by comparison of their spectroscopic data with those of the well-known compound, norzoanthamine.

  13. Variation in biomass related variables of reed canary grass

    Directory of Open Access Journals (Sweden)

    M. SAHRAMAA

    2008-12-01

    Full Text Available Reed canary grass, Phalaris arundinacea L., is a relatively new biomass crop in northern Europe, which produces raw material for bioenergy and paper pulp. Breeding reed canary grass for industrial purposes is under way in the absence of domestic cultivars being available. Knowledge of the extent of variation in biomass related traits is a basic requirement of the breeding programme. The aim of this study was to describe variation in biomass related traits and evaluate the relationships among the variables. Field experiment was carried out between 1994 and 1998 in Finland. Research material included wild and elite populations, which were divided into ten groups according to their origin. Biomass yield, plant fractions, shoot number, node number, leaf area and overwintering ability were measured. Panicle number, plant height and seed ripening were included to the analyses of the relationships. Results indicated the high biomass yield potential of reed canary grass, reaching over 13 t DM ha-1 in the fourth year after establishment. Elite material and a local group from southern Finland had the highest biomass yield, whereas the northernmost local group had the lowest. Three factors established accounted for 45% of the variance and they were defined as “high biomass yield”, “leaf-shoot relationship” and “fast development”. The first factor indicated positive connections among biomass yield, panicle number, plant height, straw fraction and node fraction. This study indicated variation in agronomic traits of reed canary grass, which enables breeding of new cultivars with desired trait combinations.;

  14. Canary Islands (Spain): Their Importance in NATO’s Strategy.

    Science.gov (United States)

    1987-04-22

    in the western approach to the Strait, and over the cities of Ceuta and Melilla on the northern coast of Africa, although these are not included in...change to give rise to a clear threat against Spain. The two Spanish cities in North Africa, Ceuta and Melilla, and the Canary Islands in front of...Islands and the cities of Ceuta and Melilla, 15 ~ ~~**% *~ %% ~ *%V%* ’%~*%** ***~% %V %’V with the Air Force being responsible for the support of

  15. An offshore wind atlas for the Canary Islands

    Energy Technology Data Exchange (ETDEWEB)

    Martin Mederos, A.C. [Zona Eolica Canaria S.A., Veintinueve de Abril, 30, Las Palmas 35007 (Spain); Medina Padron, J.F. [Departamento de Ingenieria Electrica, Universidad de Las Palmas de Gran Canaria, 35017 Las Palmas (Spain); Feijoo Lorenzo, A.E. [Departamento de Enxeneria Electrica, Universidade de Vigo, ETSEI, Campus de Lagoas-Marcosende, 36310 Vigo (Spain)

    2011-01-15

    In this paper an analysis of the offshore wind potential in the Canary Islands is presented in the shape of a set of wind maps which constitute an offshore wind atlas. It has been drawn up using data processed from 40 weather stations and satellite. Results from satellite mapping, limited area modelling and mesoscalar modelling have been used by applying the technique known as 'one way nesting'. (author)

  16. Recirculation of the Canary Current in fall 2014

    Science.gov (United States)

    Hernández-Guerra, Alonso; Espino-Falcón, Elisabet; Vélez-Belchí, Pedro; Dolores Pérez-Hernández, M.; Martínez-Marrero, Antonio; Cana, Luis

    2017-10-01

    Hydrographic measurements together with Ship mounted Acoustic Doppler Current Profilers and Lowered Acoustic Doppler Current Profilers (LADCP) obtained in October 2014 are used to describe water masses, geostrophic circulation and mass transport of the Canary Current System, as the Eastern Boundary of the North Atlantic Subtropical Gyre. Geostrophic velocities are adjusted to velocities from LADCP data to estimate an initial velocity at the reference layer. The adjustment results in a northward circulation at the thermocline layers over the African slope from an initial convergent flow. Final reference velocities and consequently absolute circulation are estimated from an inverse box model applied to an ocean divided into 13 neutral density layers. This allows us to evaluate mass fluxes consistent with the thermal wind equation and mass conservation. Ekman transport is estimated from the wind data derived from the Weather Research and Forecasting model. Ekman transport is added to the first layer and adjusted with the inverse model. The Canary Current located west of Lanzarote Island transports to the south a mass of - 1.5 ± 0.7 Sv (1 Sv = 106 m3 s- 1 ≈ 109 kg s- 1) of North Atlantic Central Water at the surface and thermocline layers ( 0-700 m). In fall 2014, hydrographic data shows that the Canary Current in the thermocline (below at about 80 m depth to 700 m) recirculates to the north over the African slope and flows through the Lanzarote Passage. At intermediate layers ( 700-1400 m), the Intermediate Poleward Undercurrent transports northward a relatively fresh Antarctic Intermediate Water in the range of 0.8 ± 0.4 Sv through the Lanzarote Passage and west of Lanzarote Island beneath the recirculation of the Canary Current.

  17. Wine tourism in the Canary Islands: An exploratory study

    Directory of Open Access Journals (Sweden)

    Abel Duarte Alonso

    2008-01-01

    Full Text Available Mientras el turismo del vino está desarrollándose en varias regiones vinícolas europeas, la evolución del mismo, o su potencial, en las Islas Canarias son poco conocidos. Este estudio exploratorio examina estas áreas entre 23 bodegas insulares. Los resultados revelan el potencial de desarrollo del turismo del vino en las islas, con bodegas que, o bien ya forman parte de este concepto, o planean acrecentar su participación. Los bodegueros entrevistados reconocen impedimentos que están frenando el desarrollo de la industria vinícola y del turismo del vino en las islas, incluyendo la competición de vinos foráneos y leyes del control de alcoholemia que inhiben el consumo del vino en bodegas entre los visitantes. Asimismo, los bodegueros perciben la necesidad de encontrar un balance entre el turismo en masa y el nicho del producto vinícola. Finalmente, el estudio propone áreas de futura investigación sobre el desarrollo del turismo del vino en Canarias.

  18. La evolución de los sistemas constructivos y estructurales en Las Palmas de Gran Canaria como instrumento de datación de la construcción en Gran Canaria (1478-1950)

    OpenAIRE

    Galtier Barroso, Gazmira

    2016-01-01

    Programa de doctorado: La restauración y rehabilitación arquitectónica. Investigación, tendencias e innovaciones. La fecha de publicación es la fecha de lectura [ES]La presente tesis doctoral analiza la historia de la implantación de los sistemas constructivos y estructurales en Las Palmas de Gran Canaria, atendiendo a los factores descritos anteriormente, como caso significativo de la arquitectura realizada en Gran Canaria, en el periodo correspondiente al desarrollo de las formas tradici...

  19. Ácaros Mesostigmata (Acari, Mesostigmata de hábitats seleccionados de La Gomera (islas Canarias, España

    Directory of Open Access Journals (Sweden)

    Moraza, M. L.

    2005-06-01

    Full Text Available The study of 47 samples from different habitats on La Gomera (Canary Islands, reveals 43 species representing 13 families from the order Mesostigmata. Most species were members of the families Ascidae (11 species and Laelapidae (9, followed by Macrochelidae and Pachylaelapidae (7 species. The most abundant species (abundance of 9% or greater found in the collected material are: Gamasiphis pulchellus (Berlese, 1887, Gamasellodes bicolour (Berlese, 1918, Veigaia planicola Berlese, 1892 and Pseudoparasitus dentatus (Halbert, 1920. The species found in the largest number of samples were Uropoda misella (Berlese, 1916 and G. bicolour (21%, V. planicola (19% and Holoparasitus Oudemans sp. (17%. Fayal-heather and laurisilva, with 36 species, provided the most diverse habitat; 9 species are associated with Erica arborea L., 9 species with Geranium canariensis Reut. and 9 with Sideritis lotsyi (Pitard.

    Como resultado del estudio de 47 muestras recogidas en diferentes hábitats de la isla de La Gomera (Islas Canarias, se obtuvieron 43 especies pertenecientes a 13 familias del orden Mesostigmata. Las familias Ascidae y Laelapidae son las mejor representadas, con 11 y 9 especies respectivamente, seguidas de Macrochelidae y Pachylaelapidae con 7. Las especies más abundantes (abundancia mayor o igual al 9% en el material recolectado son: Gamasiphis pulchellus (Berlese, 1887, Gamasellodes bicolor (Berlese, 1918, Veigaia planicola Berlese, 1892 y Pseudoparasitus dentatus (Halbert, 1920. Las especies más frecuentes (por aparecer en el mayor número de muestras son Uropoda misella (Berlese, 1916 y G. bicolor (21%, V. planicola (19% y Holoparasitus Oudemans sp. (17%. El fayal-brezal y laurisilva (monteverde, con 36 especies, es el hábitat más diverso; 9 especies se asocian a Erica arborea L., 9 a

  20. Esas empeñadas luchas a que son muy aficionados los naturales de este país: un acercamiento a la etnicidad a través de la lucha canaria (1840-1943

    Directory of Open Access Journals (Sweden)

    Alonso, Víctor

    2016-06-01

    Full Text Available Sports in general, and traditional sports in particular, make a key contribution to the processes linked to the configuration of any identity. These activities can be studied as a reality «in its own right» (with a certain relative autonomy, as a part of a specific social subject, or as a diacritical social matter that enables us to characterize structures and social processes which, over time, could favour the changes, meanings and visions, whether considered legitimate or maligned, that are contained in these practices. This article deals with the traditional sport of lucha canaria [Canary-island wrestling], which has proved a revealing historical construct, to the extent that this popular game turned sports discipline underwent intense transformation during the 19th and early- 20th centuries. Its analysis provides an insight into the different social meanings, supports and principles associated with this activity, revealing a complex space of relations where the indigenous Guanche, historical tradition and an ongoing link with modernity are particularly relevant. All of this endorses the debate in recent decades in social anthropology and the social sciences regarding ethnicity, identity and sports.El deporte, y especialmente los deportes tradicionales, son una contribución de primer orden a los procesos de construcción identitaria. Puede ser estudiado como realidad «en sí» (dotada de relativa autonomía, al modo de un campo social específico, o bien en modo de diacrítico social que permite caracterizar unas estructuras y procesos sociales que, a lo largo del tiempo, favorecen las transformaciones, sentidos y visiones legitimadas o denostadas contenidas en las prácticas. Este artículo trata la lucha canaria, un deporte tradicional que se manifiesta como constructo histórico revelador, al tratarse de un juego popular deportivizado que vive una intensa transformación a lo largo del siglo XIX y las primeras décadas del XX. Su

  1. Aproximación tipológica a los paisajes agrarios actuales de Canarias

    OpenAIRE

    Martín Martín, Víctor O.

    2000-01-01

    En el Archipiélago Canario se han conformado una pluralidad de espacios agrícolas que otorgan a estas islas de tan reducida superficie una enorme y, a la vez, singular riqueza agropecuaria. Sin embargo, las importantes transformaciones producidas en la agricultura pero también en el conjunto de la economía canaria en los últimos treinta años han modificado sustancialmente los tradicionales paisajes agrarios (en negativo con el abandono y en positivo con introducción de nuevas p...

  2. EVOLUCIÓN DE LA MORTALIDAD ATRIBUIBLE AL TABACO EN LAS ISLAS CANARIAS (1975-1994

    Directory of Open Access Journals (Sweden)

    Luis M Bello Luján

    2001-01-01

    Full Text Available Fundamento: El objetivo de este trabajo es describir la mortalidad atribuible al consumo de tabaco en las Islas Canarias durante el período 1975-1994. Método: Las defunciones por edad, sexo y causa desde 1975 a 1994 se obtuvieron del Instituto Nacional de Estadística (Movimiento Natural Población. A partir de las Encuestas de Salud de España y Canarias se tomaron los porcentajes de nunca fumadores, fumadores y ex-fumadores de la población canaria por edad y sexo. Los riesgos relativos de muerte se obtuvieron del Cancer Prevention Study II, llevado a cabo en Estados Unidos de América. Se calculó la proporción de muertes atribuibles al tabaco para cada año, sexo y grupo de edad a partir de la fracción atribuible poblacional. Así mismo, se calculó la tendencia de la mortalidad atribuible para dicho período expresada como el cambio porcentual medio anual de las tasas de la mortalidad ajustadas por edad, mediante un modelo log-lineal. Resultados: Durante el período 1975-1994, el número de fallecimientos atribuidos al tabaco aumentó un 64%. Por grandes causas, se observó en el período de estudio, un aumento de las neoplasias del 108%, una disminución de las enfermedades cardiovasculares del 32% y un incremento de las enfermedades respiratorias del 15,5%. Se observó también que el número de fallecidos aumenta con la edad, siendo el grupo de edad de 65 años y más en el que se presentan más muertes por el tabaco. Conclusiones: En las Islas Canarias, más del 20% de todas las muertes en 1994 se pueden atribuir al tabaco. Esto sugiere que las medidas introducidas para controlar el tabaquismo son insuficientes.

  3. Instrumento para la medición del consumo de medios en Canarias

    OpenAIRE

    Dr. José Pestano Rodríguez

    1998-01-01

    Resulta fundamental para el estudio completo de los medios de comunicación audiovisual, el uso que las personas hacen de cada uno de ellos. En el caso canario, quizás el alejamiento de las islas respecto a la metrópolis haya penalizado y condicionado este tipo de trabajos. Las investigaciones específicas sobre recepción en la comunidad autónoma de Canarias no han hecho más que empezar y, como suele ocurrir de forma tradicional, se vienen realizando estudios de audiencia sólo desde la perspect...

  4. Instrumento para la medición del consumo de medios en Canarias

    Directory of Open Access Journals (Sweden)

    Dr. José Pestano Rodríguez

    1998-01-01

    Full Text Available Resulta fundamental para el estudio completo de los medios de comunicación audiovisual, el uso que las personas hacen de cada uno de ellos. En el caso canario, quizás el alejamiento de las islas respecto a la metrópolis haya penalizado y condicionado este tipo de trabajos. Las investigaciones específicas sobre recepción en la comunidad autónoma de Canarias no han hecho más que empezar y, como suele ocurrir de forma tradicional, se vienen realizando estudios de audiencia sólo desde la perspectiva economicista del mercado publicitario.

  5. {Proteccion del patrimonio natural vs. derecho de los animales: en Gran Canaria

    OpenAIRE

    Viera Ruiz, Gustavo

    2016-01-01

    Las cabras asilvestradas son uno de los problemas ambientales más importantes de la zona suroeste de la isla de Gran Canaria, hecho que ha sido recogido en diferentes documentos técnicos tales como los instrumentos de ordenación de los Espacios Naturales y los planes de conservación de las diferentes especies vegetales que se encuentran en peligro de extinción, tales como la jarilla de Inagua (Helianthemum inaguae), endemismo local con una única población gravemente amenazada por este impacto...

  6. Ritos de Fecundación en la Prehistoria de Gran Canaria

    Directory of Open Access Journals (Sweden)

    Antonio TEJERA GASPAR

    2009-10-01

    Full Text Available El conocimiento de las manifestaciones religiosas y de los rituales que les acompañan en las diferentes culturas prehistóricas de las Islas Canarias, se puede hacer a partir de un triple contenido: las fuentes escritas, la Arqueología y la comparación crosscultural. Las fuentes escritas son de género muy variado y se escriben, asimismo, en épocas muy diferentes, por lo que su aportación es diversa y, en muchas ocasiones, resulta contradictoria, por las múltiples concepciones de otras tantas épocas y hombres que las han transcrito.

  7. Safety assessment of consumption of glabrous canary seed (Phalaris canariensis L.) in rats.

    Science.gov (United States)

    Magnuson, B A; Patterson, C A; Hucl, P; Newkirk, R W; Ram, J I; Classen, H L

    2014-01-01

    Canary seed is a nutrient-rich cereal grain; however, it has not been used in human food in part due to concerns regarding safety of consumption. Glabrous or hairless canary seed has potential human food use as trichomes are absent. The objective of the oral feeding studies reported here was to assess the safety of yellow and brown glabrous canary seed cultivars as human cereal foods. The first study was a 90-day rat oral toxicity study, which compared the effects of diets containing 50% of either brown dehulled glabrous, brown hulled glabrous, or brown hulled pubescent (hairy) hulled canary seed to a diet containing 50% wheat. No significant adverse effects were observed. In a 28-day and a 90-day study rats were fed yellow or brown glabrous canary seed groats in the AIN-76 diet at concentrations levels of 2.5%, 5% and 10%. The NOAELs in 90-day study were 5.15 g/kg/d and 5.23 g/kg/d for yellow and brown canary seed groats. Consumption of canary seed was associated with reduced incidence and severity of liver lipidosis as compared to controls. The combined results of these studies clearly demonstrate the safety of consumption of glabrous canary seed, and support its use as a human cereal grain. Copyright © 2013 Elsevier Ltd. All rights reserved.

  8. The Grammar School at the Cathedral of the Canary Islands (1563-1851)

    Science.gov (United States)

    Vera-Cazorla, Maria Jesus

    2013-01-01

    From 1563 until the death of the last teacher in 1851, there was a prebendary in the Cathedral of the Canary Islands in charge of the education of children. In fact, it could be said that this prebendary was the only continuous secondary school teacher there was in the Canary Islands until the beginning of the nineteenth century when the High…

  9. Radio ECCA: A Distance Learning System in the Canary Islands. DERG Papers, Number 5.

    Science.gov (United States)

    Cepeda, Luis Espina

    The Cultural Radio Station of the Canary Islands (Radio ECCA), a distance learning system, is described. Various Spanish institutions have introduced the ECCA system of teaching into their respective provinces by collaborative agreements with Radio ECCA. The total enrollment of ECCA students in Spain (including the Canary Islands) reached 28,505…

  10. Gymnopus beltraniae, a new species of section Vestipedes (Agaricales) from the Canary Islands (Spain)

    NARCIS (Netherlands)

    Banares, Á.; Antonín, V.; Moreno, G.

    2007-01-01

    Gymnopus beltraniae, collected on the Canary Islands in ‘monteverde’ forest as well as mixed monteverde/Canary pine forest, is proposed as a new species belonging to sect. Vestipedes subsect. Vestipedes. It is compared with species from North and South America considered to represent the closest

  11. Final outcome of raptors admitted to the Tafira Wildlife Rehabilitation Center, Gran Canaria Island, Spain (2003–2013)

    OpenAIRE

    Montesdeoca, N.; Calabuig, P.; Corbera, J. A.; Rocha, J.; Orós, J.

    2017-01-01

    Disposición final de las rapaces admitidas en el Centro de Rehabilitación de Fauna Silvestre de Tafira, Gran Canaria, España (2003–2013) En este estudio se analizan los resultados de la rehabilitación de aves rapaces silvestres admitidas en el Centro de Rehabilitación de Fauna Silvestre de Tafira en la isla de Gran Canaria, España, desde 2003 hasta 2013, mediante un sistema de auditoría de la calidad basado en los índices generales y clasificados (por causa de admisión) de las cuatro c...

  12. PREFERENCIAS Y VALORACI Ó N DE LOS NAVEGANTES EUROPEOS EN CANARIAS (ESPAÑA

    Directory of Open Access Journals (Sweden)

    Yen Elízabeth Lam-González

    2017-01-01

    Full Text Available Nautical tourism is a strategic sector for the development of tourism in Spain and the sustainability of its traditional destinations, even though there are few studies on the area. The sector is a priority concern for the Canary Islands, and there is a clear public commitment to specialise and reposition the destination on a European level. The present article has been developed as a result of surveying 122 European yachtsmen on route to the Canary Islands between the years 2013 and 2014. It analyses their travel preferences and motivations and contrasts their evaluations and perceptions of the ports and the destination itself. The results provide the opportunity for developing recommendations for business model designs and for tourism management and promotional strategies.

  13. El discurso de rechazo al turismo en Canarias: una aproximación cualitativa

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    Marrero Rodríguez, J. Rosa

    2006-01-01

    Full Text Available Tourism is a very important activity in the Canary Islands, both economically and socially. It benefits local population through economic growth and employment creation. But after several decades of tourism development in the islands, academic knowledge about the behaviour of the sector and the impacts it creates is still scarce, considering its importance. One of the less known issues about tourism in the Canary Islands is the resident’s perception towards tourism. And it is this issue this paper deals with. It will be focused on the social discourses rejecting tourism in the Islands, even though it will also consider social discourses that have supported and still support tourism development. The paper adopts a qualitative strategy. The objective is not to analyze how many people in the Canary Islands reject or accept tourism, but rather to understand the meaning of their discourses about it. There are three impor-tant ideas in the reject discourse: tourism generate high concentration of population in the islands, the benefits of the activity go out and the tourists and the touristic model symbolize a low prestige consump-tion leisure product. Because today the sun and sea model symbolize low prestige

  14. MOAO LQG control for CANARY: theory and first laboratory results

    Science.gov (United States)

    Sivo, G.; Kulcsár, C.; Raynaud, H.-F.; Conan, J.-M.; Gendron, É.; Vidal, F.

    2011-09-01

    Single Conjugated Adaptive Optics (SCAO) is a proven technique used in order to correct the effect of atmospheric turbulence and vibrations of the WaveFront (WF). The corrected field of view (FoV) is however limited by the anisoplanetism effect. Many concepts of Wide Field AO (WFAO) systems are under development, especially for the design of Extremely Large Telescopes (ELTs) instruments. Multi-Object Adaptive Optics (MOAO) is one of these WFAO concepts that is particularly suited to high redshifts galaxies observations in very wide FoV. The E-ELT instrument EAGLE will use this approach. CANARY is the on-sky pathfinder for MOAO. It obtained the first compensated images on Natural Guide Stars (NGSs) at the William Herschel Telescope in September 2010. The control and performance optimization of such complex system are a key issue. Linear Quadratic Gaussian (LQG) control is an appealing strategy that provides optimal control for an explicit minimum variance performance criterion. It also provides a unified formalism that allows accounting for specific multi WF Sensing (WFS) channels, both for Laser Guide Stars (LGSs) and NGSs, and for various disturbance sources (turbulence, vibrations). Furthermore, preliminary simulation results suggest that performance can be significantly improved with tomographic LQG control compared to MMSE static reconstruction. Our objective is to obtain a first on-sky demonstration of tomographic LQG control during CANARY Phase B, featuring LGS and NGS WFS. We show how the specific MOAO CANARY configuration can be embedded in a state-space framework. The state-space model includes: stochastic auto regressive models of order 2 for the turbulent phase in each layer and for vibrations affecting the telescope; LGS and NGS measurement equations; DM model and delays in the loop. Model identification and off-line calculations necessary for a robust on-sky operation are discussed. First laboratory results and on-sky test plan for the coming observing

  15. Xenophobic discourse and agenda-setting. A case study in the press of the Canary Islands (Spain

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    Rodrigo F. Rodríguez Borges, Ph. D.

    2010-01-01

    Full Text Available Since its formulation by McCombs and Shaw in the 70s, the concept of agenda-setting has proved to be of relevant heuristic value to explore the relationship between the media agenda and the public agenda and the processes of transference between them both. Taking this idea as a reference and basing on the tools of the analysis discourse by Van Dijk, this article shows the strategy of informative dosage developed by the newspaper El Día from Tenerife, Canary Islands (Spain to turn the irregular immigration into the main issue in the civil agenda. The case study is focused on the support given by the newspaper to the call for a demonstration supporting a law of residence as the solution to the arrival of immigrants to the islands. We identified the writing units addressed to the demonstration call, the deliberate chronological sequence used to inform the readers and the editorial declarations supporting the initiative. The analysis lets us appreciate a paradigmatic example of the power of the media to set the political agenda and take in the political parties and the main institutions.Resumen: Desde su formulación en la década de los 70 por McCombs y Shaw, el concepto de 'fijación de agenda' ha demostrado un relevante valor heurístico para explorar las relaciones entre la agenda de los medios y la agenda pública y los procesos de transferencia entre ambas esferas. Tomando como referencia esta noción y apoyándose en las herramientas del análisis del discurso desarrolladas por Van Dijk, este artículo muestra la estrategia de dosificación informativa seguida por el periódico El Día, de Tenerife, Islas Canarias (España para convertir la inmigración irregular en una cuestión central en la agenda ciudadana. El estudio de caso se centra en el apoyo prestado por el diario a la convocatoria de una manifestación ciudadana en favor de una ley de residencia como solución a la llegada de inmigrantes a Canarias. En el estudio se procedió a

  16. Relationship between vegetation dynamics and dune mobility in an arid transgressive coastal system, Maspalomas, Canary Islands

    Science.gov (United States)

    Hernández-Cordero, Antonio I.; Hernández-Calvento, Luis; Espino, Emma Pérez-Chacón

    2015-06-01

    This paper explores the relationship between vegetation dynamics and dune mobility in an arid transgressive coastal dune system, specifically the dune field of Maspalomas (Gran Canaria, Canary Islands). The aim is to understand the strategies of colonization and survival that plant communities have developed in slacks that face dune advance. The relationship between plant colonization and dune migration was performed by following Tamarix canariensis and Traganum moquinii plants for several years. Morphological data about each individual as well as the distance of each plant to the dune were measured. A study of the colonization patterns developed by T. moquinii, T. canariensis, Cyperus laevigatus and Launaea arborescens communities was performed by analyzing the evolution of consolidated plant patches and adult plants in relation to the dune advance. This was achieved using digital orthophotos and spatial analysis from geographic information systems. Initiation of plant colonization over transgressive dunes occurs on both wet and dry slacks. The results show that both plant colonization and development of adult plants are largely related to dune mobility. Thus, survival of T. moquinii and T. canariensis plants under dune migration conditions is related to both distance to the dune front and plant height at the moment of burial. Distance from the dune front and plant height increases chance of survival. The dynamics of adult plants is also related to dune displacement rates. Thus, each community has different thresholds of resistance to mobility rates. The T. canariensis community withstands average rates higher than 3 m/year. Its arboreal structure allows this species to grow high enough to resist the advance of the dunes and burial. For the T. moquinii community, the population decreases gradually to eventually disappear when dune mobility rates exceed 4 m/year. The C. laevigatus community develops at dune mobility rates lower than 3 m/year, decreasing its surface

  17. Morphometric interpretation of the northwest and southeast slopes of Tenerife, Canary Islands

    Science.gov (United States)

    1997-01-01

    Both the northwest and southeast slopes of Tenerife, Canary Islands, owe their morphology to catastrophic sediment failures. An area of 4100 km2 and a volume of about 2362 km3 were involved in the failure. A 100- to 600-m-high scarp on the upper slope separates the sediment failures in the Orotova and Icod de los Vinos Valleys on the northwest coast from those on the slope. A similar (700 m high) scarp also separates the failures on the southeast slope from the failure in Güimar Valley on land. The sediment failure off Las Bandas Del Sur volcanic fan does not have any land counterparts and was the result of the failure of the front (1700 m high) of this depocenter; two generations of debris flows are mappable off this depocenter. We infer that the slopes off Orotova, Icod, and Güimar represent the front of the debris avalanche and/or creep deposits that were created during the formation of the valleys. Downslope from the debris avalanche fronts are irregular surfaced masses extending to the base of the slope. The front may define the contact between the more dense deposits onshore and upper slope and the more fluid deposits on the lower slope. Incised on the debris avalanche on the northwest lower slope are three channeled debris flows grading seaward into turbidites. Only one of these channels occurs on the southeast slope. The breakaway surface of these sediment failures was the front of the debris avalanches and/or creep. We ascribe the failure of this front mainly to its rapid buildup, although groundwater sapping also may have contributed to its failure. On the southeast slope, movement along the northeast trending fault between Gran Canaria and Tenerife also may have been a contributing factor to the failure of the front. The debris flow deposits triggered by the failure of the sediment front on the northwest slope are characterized by ridges formed either by pressure between flows moving at different velocities or by scouring; at least one volcanic edifice

  18. El Confital (Gran Canaria: una prospección etnográfica

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    Paulo González

    2004-01-01

    Full Text Available Este trabajo forma parte de un proyecto de investigación sobre movimientos sociales en las Islas Canarias aun en realización. Desde una perspectiva política y relacional indaga en el proceso de desalojo que se encuentran viviendo algunos grupos categorizados como poblaciones marginales de la ciudad de Las Palmas de Gran Canaria. El desplazamiento y reubicación de los grupos estigmatizados es derivado de las actividades especulativas relacionadas con elementos macrosociales como es el turismo, factor preponderante en la economía del archipiélago. De esta forma este estudio analiza las relaciones de poder articulando las representaciones sociales de los grupos con los discursos y prácticas de los mismos. Así mismo, el estudio diacrónico permite reconstruir las trayectorias sociales de los individuos y del barrio como miembro social activo, más concretamente en las movilizaciones sociales que éste ha generado. Este es un estudio etnográfico que implementa técnicas combinadas de entrevistas semidirigidas y observación participante.

  19. Mujer y poder en la Gran Canaria Prehispánica

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    Amelia Rodríguez Rodríguez

    2013-11-01

    Full Text Available En el presente texto se reflexiona sobre el verdadero estatus de las indígenas de las isla de Gran Canaria  y sus relaciones con las instancias del poder en la sociedad aborigen de los siglos previos a la conquista europea. Para ello se recurre a los datos emanados de las fuentes etnohistóricas y, en menor medida, a las aportaciones de la investigación arqueológica. Se intenta demostrar la precariedad de los argumentos que abogan por la existencia de una sociedad matriarcal donde las mujeres tendrían un destacado papel. También se sugiere la probabilidad de que los sistemas de que organización familiar y de herencia no fueron  estrictamente iguales en las distintas clases sociales.In the present paper, the true status of indigenous women from Gran Canaria island is questioned. It is also discussed the nature of their relationships with the power institutions of the aboriginal society during the previous centuries to the European conquest. Ethnohistoric documents as well as archaeological research are the miain sources of this study. It is tried to show the weakness of the arguments upholding the existence of a matriarchal society in which women had a prominent role. It is also suggested the probability of that every social class had not strictly similar family organization or heredity laws.

  20. Canary: An NLP Platform for Clinicians and Researchers.

    Science.gov (United States)

    Malmasi, Shervin; Sandor, Nicolae L; Hosomura, Naoshi; Goldberg, Matt; Skentzos, Stephen; Turchin, Alexander

    2017-05-03

    Information Extraction methods can help discover critical knowledge buried in the vast repositories of unstructured clinical data. However, these methods are underutilized in clinical research, potentially due to the absence of free software geared towards clinicians with little technical expertise. The skills required for developing/using such software constitute a major barrier for medical researchers wishing to employ these methods. To address this, we have developed Canary, a free and open-source solution designed for users without natural language processing (NLP) or software engineering experience. It was designed to be fast and work out of the box via a user-friendly graphical interface.

  1. Clinical and pathological findings of concurrent poxvirus lesions and aspergillosis infection in canaries.

    Science.gov (United States)

    Reza, Kheirandish; Nasrin, Askari; Mahmoud, Salehi

    2013-03-01

    To investigate clinical, pathological and mycological findings in canaries, in which pox lesions and Aspergillus fumigatus (A. fumigatus) infection were observed simultaneously. This study was performed on a breeding colony (about 100 canaries) affected by fatal wasting disease. Necropsy was undertaken on 10 severely affected canaries, and gross lesions were recorded. Samples from internal organs displaying lesions were obtained for histopathological evaluation. Tracheal swap samples of internal organs of the all infected animals with lesions at necropsy were cultured in Sabouraud Dextrose Agar for mycological examination. At necropsy, caseous foci were determined in the lungs, on the air sacs, liver, spleen, heart. Swelling of the eyelids, diffuse hemorrhages in the subcutaneous tissue with small papular lesions of the skin were other typical necropsy findings. Histopathologically, pathognomonic eosinophilic intracytoplasmic inclusion bodies, which called Bollinger bodies, in both skin cells and vacuolated air way epithelial cells confirmed canary pox infection. Moreover, histopathological examination of the white-yellowish caseous foci revealed necrotic granulomatous reaction consisting of macrophages, heterophil leukocytes and giant cells encapsulated with a fibrous tissue. After the culture of the tissue samples, the formation of bluish green colonies confirmed A. fumigatus infection. Canary pox has been known as the disease that can result in high losses in a short time, as a re-emerging disease that has not been present during recent years in canary flocks in Iran. So, the current paper provides useful information to prevent misdiagnosed of canary pox disease which can cause secondary mycotic infection.

  2. Fractionation of hairless canary seed (Phalaris canariensis) into starch, protein, and oil.

    Science.gov (United States)

    Abdel-Aal, El-Sayed M; Hucl, Pierre; Patterson, Carol Ann; Gray, Danielle

    2010-06-09

    Canary seed is an important specialty crop in Canada. The current market for this true cereal (i.e., belonging to the family Poaceae as wheat) is limited to feed for caged birds. However, canary seed holds a promise for many food and industrial applications based on its composition. Three wet milling procedures based on ethanol (E), water (W), and alkaline (A) extractions used in different order were investigated to determine extraction efficiency and purity of starch, protein, oil, and fiber separated from hairless canary seed, a variety developed for human consumption. Highest extraction efficiencies were obtained when canary seed was defatted with ethanol and then extracted with alkali and water (EAW process). Using this process, approximately 92% pure starch, 75% pure protein, and oil were recovered from canary seed groats. The highest purity of protein, however, was obtained when canary seed was fractionated by the EWA process, that is, defatted and then extracted with water followed by alkali. Fiber component separated prior to alkaline extraction contained high amounts of nonfiber components as indicated by its yield. The EAW extraction process seems to be more promising in canary seed fractionation based on recovery and purity of components.

  3. Maternal effects and beta-carotene assimilation in Canary chicks.

    Science.gov (United States)

    Tanvez, Aurélie; Amy, Mathieu; Chastel, Olivier; Leboucher, Gérard

    2009-03-02

    Carotenoids are pigments responsible for the red, orange and yellow coloration of plants and animals. They may be beneficial in two ways; they have a powerful antioxidant activity, and they can behave as an immunostimulant. Animals however cannot synthesize carotenoids de novo, they must obtain them through their diet. In our experiments on Canaries, we investigated how mothers transfer their dietary carotenoid-related benefits to their offspring; either through the egg, or through the diet (during chicks' feeding). Female Canaries were allowed to access beta-carotene enriched food during egg formation and/or chicks' feeding. We sorted the chicks into four groups using the period when they assimilated the beta-carotene as a variable. The four groups were: (i) before hatching (from yolk), (ii) after hatching (from maternal feeding), (iii) before and after hatching, or (iv) never. Colorimetry and HPLC analysis from sub-samples of yolks confirmed the maternal transfer of dietary carotenoids to the yolk. Our results show that benefits from maternal dietary carotenoids are transferred to the chicks, but according to the period when they are assimilated by the chicks, the physiological effects are different. It was found that the chicks' growth was enhanced when carotenoids were assimilated both before and after hatching. However an increase in cellular immunity efficiency only occurs when the assimilation takes place after hatching.

  4. CO2 - The Canary in the Energy Efficiency Coal Mine

    Science.gov (United States)

    Somssich, Peter

    2011-04-01

    While much of the discussion surrounding CO2 is focused on its role as a GHG (green house gas) and its affect on Climate Change, CO2 can also be viewed as an indicator for reductions in fossil fuel use and increased energy efficiency. Much as the canary in a mine was used to warn miners of unsafe health conditions in a mine, CO2 can be seen as allowing us to effectively track progress towards energy efficiency and sustainability. Such an effort can best be achieved by either a Carbon Tax or a Cap and Trade system which was highly effective as part of the 1992 Clean Air Act, contributing to a significant reduction of SO2 and acid rain. A similar attempt has been made using the 1997 Kyoto Protocol to reduce carbon emissions. The mechanisms of how this treaty was intended to work will be explained, and examples will be given, both in the USA and Europe, of how the protocol was used to reduce energy consumption and energy dependence, while also reducing CO2 emissions. Regardless of how strong an impact CO2 reduction may have for Climate Change issues, a reduction of CO2 is guaranteed to produce energy benefits, monetary benefits and can even enhance national security. For all of these reasons, we need the CO2 canary.

  5. Hacia un producto integral: campaña promocional de Canarias durante los JJ.OO. de 1996

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    Lic. María A. Gabino Campos

    2002-01-01

    Full Text Available Los JJ.OO. de Atlanta en 1996 fueron el marco elegido por la Consejería de Turismo y Transporte del Gobierno de Canarias para introducir la marca "Canarias" en EE.UU. La ambiciosa campaña promocional se llevó a cabo desde el 18 de junio al 5 de agosto de 1996, para lo cual se instaló un pabellón promocional en el centro de la ciudad de Atlanta. Asimismo se aprovechó el viaje a Atlanta, para visitar Augusta y vender las islas como un lugar ideal para practicar golf. En esta ocasión, el Gobierno de Canarias vende el archipiélago como una única marca, "Canarias", con siete destinos. A la oferta tradicional de sol y playa se le une la historia, la cultura, la gastronomía, los deportes náuticos, la sanidad e incluso las ventajas fiscales de las islas. Por primera vez, el archipiélago se da a conocer con todas sus peculiaridades.Canarias no sólo realiza una campaña en solitario, fuera de las promociones tradicionales de ferias o impactos publicitarios, en un mercado arriesgado, sino que cambia sus ya experimentadas estrategias en el mercado europeo por una iniciativa novedosa, con el objeto de atraer nuevos inversores turísticos que sondean novedosos destinos y a empresarios en busca de lugares con regímenes fiscales especiales para instalar sus empresas.

  6. Islas de ida y vuelta. Canarias y El Caribe en contexto colonial

    OpenAIRE

    Ortiz García, Carmen

    2004-01-01

    On the presupposition that the conquest of the Canary Islands set the colonial stage for the later Spanish enterprises in the Americas, the author discusses a number of elements of identity shared by the islands of both the eastern Atlantic and the Caribbean. Sugar, the slave trade and the raising of bananas, cochineal and tobacco are the instances chosen for this comparative analysis. In addition, the author makes a reference to the legends of the apparition of the Virgin of Charity at El Co...

  7. Aproximación tipológica a los paisajes agrarios actuales de Canarias

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    Víctor O. Martín Martín

    2000-01-01

    Full Text Available En el Archipiélago Canario se han conformado una pluralidad de espacios agrícolas que otorgan a estas islas de tan reducida superficie una enorme y, a la vez, singular riqueza agropecuaria. Sin embargo, las importantes transformaciones producidas en la agricultura —pero también en el conjunto de la economía canaria— en los últimos treinta años han modificado sustancialmente los tradicionales paisajes agrarios (en negativo con el abandono y en positivo con introducción de nuevas prácticas agropecuarias. Como consecuencia del proceso evolutivo siempre dinámico de los paisajes agrarios, en este artículo se propone una clasificación y se analiza el estado actual de los mismos, aunque siempre que sea necesario se recurrirá a explicaciones sobre su organización espacial tradicional.

  8. Prevalencia de la enfermedad pumonar obstructiva crónica en Canarias

    OpenAIRE

    Cabrera López, Carlos

    2013-01-01

    Programa de doctorado: Avances en Medicina Interna [ES] Introducción: La prevalencia de la Enfermedad Pulmonar Obstructiva Crónica (EPOC)varía ampliamente según la región geográfica. En España existen dos estudios epidemiológicos que sitúan la prevalencia entre un 9-10% de la población mayor de 40 años. Sin embargo ninguno de ellos incluye a las islas Canarias, interesantes por sus características climáticas y por la alta prevalencia de tabaquismo. Materiales y métodos: a partir de muestra...

  9. El cólera en Canarias (1851: su tratamiento en prensa

    Directory of Open Access Journals (Sweden)

    Lic. Gabriel Díaz Mora

    1998-01-01

    Full Text Available El cólera, también llamado "cólera morbo" -ambos términos se usan en los periódicos estudiados- es una enfermedad aguda y contagiosa, que se manifiesta por superaciones acuosas, retortijones, vómitos, calambres musculares, supresión de la orina y colapso. La causa el bacilo vibrión de Koch cuando infesta el agua potable. Normalmente causa la muerte por convulsiones, colapso y congestión pulmonar.Esta enfermedad se produce principalmente en los trópicos, pero ha aparecido en todas las partes del mundo, llevada por el hombre en sus viajes. Esto ha justificado numerosas veces la cuarentena, como observamos en la epidemia canaria de 1851.

  10. Desarrollo urbano e inundaciones en la ciudad de las Palmas de Gran Canaria(1869-2000

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    Pablo Máyer Suárez

    2002-01-01

    Full Text Available En la ciudad de Las Palmas de Gran Canaria los episodios de lluvia facilitan la manifes-tación de riesgos geomorfológicos. El de las inundaciones constituye uno de los más impor-tantes y ha estado presente desde los orígenes de esta ciudad. Las peculiares característicasdel medio físico, tanto desde el punto de vista topográfico como desde el geológico-geomor-fológico; las distintas formas de ocupación del espacio, con áreas de crecimiento planificadasy otras de crecimiento espontáneo, y las diversas intervenciones en áreas consolidadas, quepotencian o agravan estas inundaciones, hacen de esta ciudad una amalgama en la que el aná-lisis de las causas de las inundaciones resulta un proceso complejo

  11. Marketing Experiencial en FITUR: Análisis de dos destinoscompetidores, Islas Canarias e Islas Baleares

    Directory of Open Access Journals (Sweden)

    Jano Jiménez Barreto

    2016-01-01

    Full Text Available Se realiza un estudio exploratorio cualitativo y cuantitativo, desde el punto de vista del marketing experiencial, de la visita a los stands de dos destinos similares en cuanto a su oferta turística principal (las Islas Canarias y las Islas Baleares en la Feria de Turismo Internacional (FITUR. Los resultados confirman que el marketing experiencial no es un área de gestión específica en la promoción de los destinos analizados, aunque las evidencias empíricas demuestran que existe una relación positiva y moderada entre la experiencia vivida en el stand (actividades emocionales e intelectuales desarrolladas dentro del stand y la intención de visitar el destino.

  12. La explotación de la cochinilla en las Canarias del siglo XIX

    OpenAIRE

    González Lemus, Nicolás

    2001-01-01

    En una economía agraria como la canaria, la recesión provocada en las primeras décadas del siglo XIX por la pérdida del mercado del vino, y en menor medida, la barrilla y la orchilla, y la emancipación de las colonias americanas, tenía que provocar una crisis coyuntural de serias dificultades económicas. Las economías dedicadas a otras labores no ofrecían trabajo al alto índice de desocupados. Los calados en manos femeninas habían perdido su importancia y en estos momentos suponía más b...

  13. Emigración y actividad empresarial canaria en Cuba, 1850-1950

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    Miguel Suárez Bosa

    2013-09-01

    Full Text Available Los emprendedores canarios contribuyeron a la construcción del tejido empresarial cubano mediante la creación y desarrollo de una gran variedad de empresas: pequeños propietarios agrícolas del tabaco, comerciantes internacionales, titanes del sector financiero y propietarios de centrales azucareros; otros terminaron especializándose en pequeñas empresas de servicios urbanos como la distribución de leche. En este artículo se analizan, en primer lugar, las migraciones canarias en el contexto de las cadenas migratorias atlánticas; en segundo lugar, se exponen los aspectos más importantes del desarrollo empresarial protagonizado por los emigrantes isleños en Cuba.

  14. Microplastic and tar pollution on three Canary Islands beaches: An annual study.

    Science.gov (United States)

    Herrera, A; Asensio, M; Martínez, I; Santana, A; Packard, T; Gómez, M

    2017-10-26

    Marine debris accumulation was analyzed from three exposed beaches of the Canary Islands (Lambra, Famara and Las Canteras). Large microplastics (1-5mm), mesoplastics (5-25mm) and tar pollution were assessed twice a month for a year. There was great spatial and temporal variability in the Canary Island coastal pollution. Seasonal patterns differed at each location, marine debris concentration depended mainly of local-scale wind and wave conditions. The most polluted beach was Lambra, a remote beach infrequently visited. The types of debris found were mainly preproduction resin pellets, plastic fragments and tar, evidencing that pollution was not of local origin, but it cames from the open sea. The levels of pollution were similar to those of highly industrialized and contaminated regions. This study corroborates that the Canary Islands are an area of accumulation of microplastics and tar rafted from the North Atlantic Ocean by the southward flowing Canary Current. Copyright © 2017 Elsevier Ltd. All rights reserved.

  15. Description of a new species of Glycymeris (Bivalvia: Arcoidea) from Madeira, Selvagens and Canary Islands

    NARCIS (Netherlands)

    Goud, J.; Gulden, G.

    2009-01-01

    After revision of the Glycymerididae in the collection of the National Museum of Natural history, a new species, Glycymeris vanhengstumi is described here. It occurs off the coast of Madeira, the Selvagens and the Canary Islands.

  16. Les formations marines et continentales intervolcaniques des îles Canaries orientales (Grande Canarie. Fuerteventura et Lanzarote: Stratigraphie et signiflcation paleoclimatique.

    Directory of Open Access Journals (Sweden)

    Meco, J.

    1985-08-01

    Full Text Available More than 20 m. y. of continuous activity in the Canary Islands have brought about the fossilization of marine fauna and soils which prove the existence of alternating warm and numid conditions of guinean origen, and also of drier influences from the Sahara, connected with the arrival of cold waters from the Lusitanian Sea. The sea deposits of the lower Pleistocene with Strombus coronatus and those of the upper Pleistocene with Strombus bubonius, which are caracteristically warm and the deposits of middle and upper Pleistoeene and of the Holocene, with various species of Patella and caracteristically cold (Meco, 1977, have already been related to volcanic activities dated by K/Ar (Meco y Steams, 1981 and are new being related to rapid effects of soil formation, the result of evaporation an clayey neoformation of volcanic materials which are constantly being renoved. The fairly rapid fossilization caused by volcanic activity, eliminates some of the effects accumulated over a period of time on the paleosoils, The existence of Saharian quartz, a mineral not found in volcanic products, and the simultaneous existence of more distant matters on the evolution of soilformation, like crusts which contain gypsum or attapulgyte of desert origin and bauxites containing nickel and tale of tropical, humid origin (Pomel, 1985, all this permit to find coherents conclusions.

    Más de 20 m. a. de actividad volcánica continuada ha permitido en las Canarias la fosilización de faunas marinas y suelos que testimonian una alternancia de condiciones cálidas y húmedas, de origen guineano, y de influencias secas, saharianas, relacionadas con aportes de aguas frescas de procedencia lusitana. Los depósitos marinos del Plioceno inferior con Strombus coronatus y los del Pleistoceno superior con Strombus bubonius, que revelan un carácter cálido, y los depósitos del Pleistoceno medio y superior y del Holoceno, con varias

  17. Genetic variability of Lizard canary breed inferred from pedigree analysis.

    Science.gov (United States)

    Cecchi, Francesca; Ciampolini, Roberta; Giacalone, Gianluca; Paci, Gisella

    2014-09-01

    The genealogical data of 471 (whole population: WP) Lizard canaries of an Italian breeder were analyzed to evaluate the genetic variability of the breed. The reference population (RP) comprised 346 living reproductive birds. Average generation interval was 1.61 ± 0.718 for males and 1.72 ± 0.863 for females. The average value of inbreeding (F) and relatedness (AR) in the RP were 15.83% and 22.63%, while the average increase in inbreeding was estimated to be 6.71% per generation (effective population size = 7.49). The results showed the need to reduce the level of inbreeding which would result in significant loss of genetic variation and in significant inbreeding depression. © 2014 Japanese Society of Animal Science.

  18. Fish larvae from the Canary region in autumn

    Directory of Open Access Journals (Sweden)

    J. M. Rodríguez

    2000-03-01

    Full Text Available In this paper, the taxonomic composition of the fish larvae community in the Canary region in autumn 1991 is presented. In total, 8699 larvae belonging to 58 fish families were studied. 176 taxonomic groups were identified, 149 at species level and the rest were identified at a higher level. The most numerous family and the one that presented the greatest number of species was Myctophidae. The most frequently caught species was Cyclothone braueri. The taxonomic composition (at family level of the fish larvae community, dominated by four mesopelagic families, was typical of oceanic regions of warm waters. The most remarkable feature of the fish larvae community was its high specific diversity.

  19. Vertical distribution of fish larvae in the Canaries-African coastal transition zone, in summer

    OpenAIRE

    J. M. Rodríguez; Hernández León, Santiago; Barton, Eric D

    2006-01-01

    This study reports the vertical distribution of fish larvae during the 1999 summer upwelling season in the Canaries-African Coastal Transition Zone (the Canaries-ACTZ). The transition between the African coastal upwelling and the typical subtropical offshore conditions is a region of intense mesoscale activity that supports a larval fish population dominated by African neritic species. During the study, the thermal stratification extended almost to the surface everywhere, and the surface mixe...

  20. Prevalence of chronic obstructive pulmonary disease in the Canary Islands.

    Science.gov (United States)

    Cabrera López, Carlos; Juliá Serdá, Gabriel; Cabrera Lacalzada, Cristina; Martín Medina, Ana; Gullón Blanco, José Antonio; García Bello, Miguel Ángel; Cabrera Navarro, Pedro

    2014-07-01

    The prevalence of chronic obstructive pulmonary disease (COPD) varies significantly among the different geographical areas reported. In Spain, two epidemiological studies have shown a prevalence of 9-10% in the population aged over 40. However, neither of these studies included the Canary Islands, which are of interest due to their climatic conditions and high incidence of smoking. A random group of 1,353 subjects aged between 40 and 70years was selected from a sample population of 596,478 individuals. Participants completed a questionnaire and then performed spirometry with bronchodilator testing if obstruction was observed. COPD was diagnosed when the post-bronchodilator FEV1/FVC ratio was less than 0.70. The prevalence of COPD was 7.3% (95%CI: 5.5-9.5) and was higher in males than in females (8.7% vs. 6.3%, P=.134). The incidence of smoking was 29.4% (95%CI: 25.4-33.1) and was also higher in males than in females (35.1% vs 25.4%, P<.001). The prevalence of COPD stratified by severity of obstruction, according to the GOLD criteria, was 16% in groupi, 69.9% in groupii, 10.4% in groupiii and 3.3% in groupiv. 71.6% of the subjects were underdiagnosed and 63.5% undertreated. Despite having one of the highest rates of smoking in Spain, the prevalence of COPD in the Canary Islands is lower than in most of the Spanish regions studied. Copyright © 2013 SEPAR. Published by Elsevier Espana. All rights reserved.

  1. Pilot Study of the Canary System Use in the Diagnosis of Approximal Carious Lesions in Primary Molars.

    Science.gov (United States)

    Herzog, Karin; D'Elia, Mindi; Kim, Amy; Slayton, Rebecca L

    2015-01-01

    This study assessed the feasibility and ease of use of the Canary System in approximal carious lesion detection in primary molars. Forty healthy five- to 12-year-olds, who presented to the Center for Pediatric Dentistry in Seattle, Wash., U.S.A., for initial or recall exams, were enrolled. Participants had one to two primary molars, with or without approximal radiographic radiolucencies. Four Canary System scans were performed at the approximal area of each study tooth. The maximum Canary number of the four scans was compared to bitewing radiographs. Seventy-five teeth were included in the final analysis. All study patients easily tolerated being scanned with the Canary System. The overall sensitivity and specificity of the Canary System, when compared to bitewing radiographs, was 81 percent and 35 percent, respectively. Among teeth without radiographic radiolucencies, the Canary System identified 65 percent (31 of 48) of study teeth as having carious lesions. The Canary System is a safe approximal caries detection device in five- to 12-year-olds. When compared to bitewing radiographs, the specificity of the Canary System for approximal carious lesion detection in primary molars was low. However, this could indicate that the Canary System is detecting lesions earlier than radiographs.

  2. First report of southern Tomato virus in tomato in the Canary Islands, Spain

    NARCIS (Netherlands)

    Verbeek, M.; Dullemans, A.M.; Espino, A.; Botella, M.; Alfaro-Fernández, A.; Font, M.I.

    2015-01-01

    In October 2006, tomato plants with torrado disease were sampled in Spain. In a sample of cv. Mariana, originating from Gran Canaria, Tomato torrado virus (ToTV, genus Torradovirus) was detected (isolate GCN06; Alfaro-Fernández et al., 2010). In 2013, the sample was further analysed using

  3. Inventariando la biodiversidad en el Parque Nacional de La Caldera de Taburiente (La Palma, Islas Canarias, España: novedades científicas

    Directory of Open Access Journals (Sweden)

    Domingo-Quero, Teresa

    2003-12-01

    Full Text Available This paper is the first result of an agreement between the Organismo Autónomo Parques Nacionales and the Consejo Superior de Investigaciones Científicas, entitled “Inventory and study of the Invertebrate Fauna of the National Park of La Caldera de Taburiente”. A detailed account of the faunistic novelties found up to now among the specimens of terrestrial and freshwater invertebrates collected along the two years of sampling (July 1999 to July 2001, whose number is estimated in ca. 500,000, is given. A brief description of planning and of methodology applied to the inventory of the invertebrate fauna is made and a tabulated summary of novelties is presented. The list shows at present 284 families, 594 genera and 739 species. For the Canary Islands, the present record of new taxa is 29 families, 115 genera (1 of them confirmed as new to Science and 3 awaiting confirmation and 187 species (24 new to Science. Moreover, 242 genera and 338 species are new to the fauna of La Palma I., being known from other islands of the archipelago. Other 47 taxa, still being studied, could be new to Science as well. These results have been reached with the study of just a minimal part of the whole material, which underlines the need for systematic, continued sampling to evaluate the faunistic richness of poorly explored areas and its possible necessity for protection. Therefore, one should expect more novelties and the inventory may increase significantly when all the material is revised.

    El presente artículo es el primer resultado de un convenio entre el Organismo Autónomo Parques Nacionales y el Consejo Superior de Investigaciones Científicas, denominado “Inventario y estudio de la Fauna Invertebrada del Parque Nacional de La Caldera de Taburiente”. Se detallan las novedades faunísticas encontradas hasta el momento entre los ejemplares de invertebrados terrestres y dulceacuícolas recogidos durante los dos años de muestreo (julio de 1999 a

  4. La erupción y el tubo volcánico del Volcán Corona (Lanzarote, Islas Canarias

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    Láinez, A.

    2003-12-01

    Full Text Available The island of Lanzarote, located at the eastem, oldest edge of the Canarian hotspot island-chain, has very sparse Holocene rejuvenation volcanism, possibly restricted to the 1824 and 1730 eruptions, ir1 agreement with the mature post-erosional stage of the island. The dating of the Corona Volcano, possibly the most recent eruptive event in the island before the historic eruptions, gives a mean 40Ar/.i9Ar age of 21 f 6.5 ka. This age agrees with the geological observations and the study of the Corona Volcano, particularly the large lava tube (7.6 km long, up to 25 m in diameter formed in the initial stages of the eruption. The last 1.6 km of' this lava tube are at present submerged, ending at a depth of at least 80 m below the present sea level. Our interpretation is that the active lava tube could not have reached that depth and, therefore, the submerged part of the tube formed as the lava flowed on a coastal platform at least 1.6 km wider and at least 80 m below the present sea level, a circumstance that could only have been possible coinciding with a period of low sea-leve1 stand related to a maximum glacial, most probably the last one, at about 20 ka. The subsequent rise in sea level left the coastal platform and the end of the lava tube submerged. The age of the Corona Volcano eruption is constrained by the radioisotopic determinations in 21 + 6.5 ka and, concordantly, by the low sea-leve1 stand recorded between about 18 and 21 ka. The Corona Volcano eruption and lava tube therefore provide clear evidence of changes in sea level in the Canaries in relation to glaciations, and establish important constraints in the volcanic history of the island of Lanzarote.La isla de Lanzarote, situada en el extremo oriental de la alineación del punto caliente de las Canarias, ha tenido escasa actividad eruptiva de rejuvenecimiento en el Holoceno, posiblemente reducida a las erupciones de 1730 y 1824, hecho que concuerda con el avanzado estado post

  5. Turismo y administración local en Canarias: un problema pendiente. Bases para un debate

    Directory of Open Access Journals (Sweden)

    Juan Israel García Cruz

    2014-02-01

    Full Text Available Las administraciones locales deben gestionar una parte importante de las infraestructuras y serviciosdemandados por el turismo. En estas áreas se combina la prestación de servicios a la población turísticay población local, lo que supone su redimensionamiento y diversificación. Como resultado, los municipiosafectados por esta dualidad deben adaptar la gestión de sus recursos, produciéndose importantesdesequilibrios.Esta distinción ha abierto un importante debate en torno a la figura del «municipio turístico» y su«discriminación positiva» frente al resto de municipios. Una fórmula que trata de compensar el desequilibrioque genera la actividad turística en la gestión local. Actualmente las islas Canarias carecende criterios oficiales para la definición de un municipio turístico, así como no se ha consensuado unlistado oficial que los identifique. En este sentido, el presente artículo pretende hacer algunas aportacionesa este debate, planteando una propuesta de delimitación.

  6. EVOLUCIÓN DEL SISTEMA TURÍSTICO DE LA ISLA DE EL HIERRO (CANARIAS

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    Carlos Santiago Martín Fernández

    2009-01-01

    Full Text Available La isla de El Hierro, la de menor extensión superficial, escasa población y económicamente vinculada a la agricultura y la ganadería, ha tenido un desarrollo reciente de la actividad turística. En el transcurso de a lo sumo dos décadas, la Isla ha ido progresivamente incorporándose a esta nueva actividad económica vinculada, no al tradicional binomio sol y playa canario, sino al co nocimiento cultural y patrimonial, la naturaleza y el deporte de aventura. El desarrollo de estrategias recientes parece abandonar el modelo que en un primer momento había sido el escogido (turismo sostenible, acercándose progresivamente a otros productos turísticos masivos. Es objeto del presente trabajo exponer cómo se ha incorporado la Isla al proceso turístico general del Archipiélago y cuáles son las particularidades que esta isla tiene dentro de una región turística como la Canaria.

  7. Geochronological constraints on the evolution of El Hierro (Canary Islands)

    Science.gov (United States)

    Becerril, Laura; Ubide, Teresa; Sudo, Masafumi; Martí, Joan; Galindo, Inés; Galé, Carlos; Morales, Jose María; Yepes, Jorge; Lago, Marceliano

    2016-01-01

    New age data have been obtained to time constrain the recent Quaternary volcanism of El Hierro (Canary Islands) and to estimate its recurrence rate. We have carried out 40Ar/39Ar geochronology on samples spanning the entire volcanostratigraphic sequence of the island and 14C geochronology on the most recent eruption on the northeast rift of the island: 2280 ± 30 yr BP. We combine the new absolute data with a revision of published ages onshore, some of which were identified through geomorphological criteria (relative data). We present a revised and updated chronology of volcanism for the last 33 ka that we use to estimate the maximum eruptive recurrence of the island. The number of events per year determined is 9.7 × 10-4 for the emerged part of the island, which means that, as a minimum, one eruption has occurred approximately every 1000 years. This highlights the need of more geochronological data to better constrain the eruptive recurrence of El Hierro.

  8. Aridity, desalination plants and tourism in the eastern Canary Islands

    Directory of Open Access Journals (Sweden)

    José-León García-Rodríguez

    2016-05-01

    Full Text Available The islands of Lanzarote and Fuerteventura are the easternmost of the Canary Islands, and are located on the southern edge of the temperate zone, in the subtropical anticyclone belt. With less than 150 mm of rainfall a year, they are classified as an arid zone. Their inhabitants have devised original agricultural systems to combat the aridity, although low yields have historically limited socio-economic development and population growth. These systems were used until the introduction of seawater desalination plants and the arrival of tourism in the last third of the twentieth century, which improved living standards for the local population but also led to a cultural transition. Nevertheless, these farming systems have left behind an important regional heritage, with an environmental and scenic value that has played an integral role in the latest phase of development. The systems have become a tourist attraction and have been central to the two islands being designated biosphere reserves by UNESCO. This article aims to analyse the main socioeconomic and land-use changes that have come about as a result of desalination technology.

  9. Acoustic Tomography in the Canary Basin: Meddies and Tides

    Science.gov (United States)

    Dushaw, Brian D.; Gaillard, Fabienne; Terre, Thierry

    2017-11-01

    An acoustic propagation experiment over 308 km range conducted in the Canary Basin in 1997-1998 was used to assess the ability of ocean acoustic tomography to measure the flux of Mediterranean water and Meddies. Instruments on a mooring adjacent to the acoustic path measured the southwestward passage of a strong Meddy in temperature, salinity, and current. Over 9 months of transmissions, the acoustic arrival pattern was an initial broad stochastic pulse varying in duration by 250-500 ms, followed eight stable, identified-ray arrivals. Small-scale sound speed fluctuations from Mediterranean water parcels littered around the sound channel axis caused acoustic scattering. Internal waves contributed more modest acoustic scattering. Based on simulations, the main effect of a Meddy passing across the acoustic path is the formation of many early-arriving, near-axis rays, but these rays are thoroughly scattered by the small-scale Mediterranean-water fluctuations. A Meddy decreases the deep-turning ray travel times by 10-30 ms. The dominant acoustic signature of a Meddy is therefore the expansion of the width of the initial stochastic pulse. While this signature appears inseparable from the other effects of Mediterranean water in this region, the acoustic time series indicates the steady passage of Mediterranean water across the acoustic path. Tidal variations caused by the mode-1 internal tides were measured by the acoustic travel times. The observed internal tides were partly predicted using a recent global model for such tides derived from satellite altimetry.

  10. A geographical distribution database of the genus Dysdera in the Canary Islands (Araneae, Dysderidae)

    Science.gov (United States)

    Macías-Hernández, Nuria; López, Salvador de la Cruz; Roca-Cusachs, Marcos; Oromí, Pedro; Arnedo, Miquel A.

    2016-01-01

    Abstract The ground-dweller spider genus Dysdera shows very high species richness on the oceanic archipelago of the Canary Islands, providing one of the most outstanding examples of island radiation among spiders, only paralleled by Tetragnatha spiders on the Hawaiian archipelago. A georeferenced database of the 48 Dysdera species occurring in the Canary Islands was assembled to facilitate ongoing and future research on this remarkable lineage. All species are endemic to the archipelago except for the cosmopolitan Dysdera crocata. The dataset consists of 794 distributional records documented from 1971 to 2015, each locality being represented only once per species. Distribution maps are provided for each species, along with basic diversity and distribution information. The database and geographical maps included in this article stand for the most updated, accurate and complete information on the distribution of the spider genus Dysdera in the Canary Islands. PMID:27833424

  11. Sex-linked inheritance of hearing and song in the Belgian Waterslager canary.

    Science.gov (United States)

    Wright, Timothy F; Brittan-Powell, Elizabeth F; Dooling, Robert J; Mundinger, Paul C

    2004-12-07

    Belgian Waterslager canaries have less sensitive hearing at high frequencies and produce songs with more energy at low frequencies than wild-type canaries. A backcross pedigree between Belgian Waterslager canaries and a domestic strain with wild-type song revealed inheritance patterns consistent with a factor of major effect located on the Z sex chromosome affecting both poor high-frequency hearing at 4 kHz and the relative energy in the spectra of the learned songs of males. Hearing thresholds at 4 kHz were significant predictors of the relative amount of song energy at 4 kHz for individual males. One hypothesis for the mechanistic basis of this correlation between hearing and song abnormalities is that a reduction in the ability to hear higher-frequency songs biases males towards learning lower-frequency songs.

  12. Repertoire sharing and auditory responses in the HVC of the canary.

    Science.gov (United States)

    Lehongre, Katia; Del Negro, Catherine

    2009-01-28

    In songbirds, auditory neurons of the nucleus HVC respond selectively to a particular complex sound, the bird's own song (BOS). In the canary, this song selectivity did not exclude responses to conspecific songs. Here, we recorded single units in nucleus HVC of adult canaries to assess to what extent repertoire sharing among birds contributed to auditory responsiveness to birds' songs other than the BOS. Results indicated that song phrases driving auditory responses could differ from bird's own phrases suggesting that a subset of neurons were not strictly tuned to acoustic features of self-generated song components. In the canary, auditory representation of the BOSs might be more complex than that which has been described for birds with a small repertoire.

  13. Differences in breeding bird assemblages related to reed canary grass cover cover and forest structure on the Upper Mississippi River

    Science.gov (United States)

    Kirsch, Eileen M.; Gray, Brian R.

    2017-01-01

    Floodplain forest of the Upper Mississippi River provides habitat for an abundant and diverse breeding bird community. However, reed canary grass Phalaris arundinacea invasion is a serious threat to the future condition of this forest. Reed canary grass is a well-known aggressive invader of wetland systems in the northern tier states of the conterminous United States. Aided by altered flow regimes and nutrient inputs from agriculture, reed canary grass has formed dense stands in canopy gaps and forest edges, retarding tree regeneration. We sampled vegetation and breeding birds in Upper Mississippi River floodplain forest edge and interior areas to 1) measure reed canary grass cover and 2) evaluate whether the breeding bird assemblage responded to differences in reed canary grass cover. Reed canary grass was found far into forest interiors, and its cover was similar between interior and edge sites. Bird assemblages differed between areas with more or less reed canary grass cover (.53% cover breakpoint). Common yellowthroat Geothlypis trichas, black-capped chickadee Parus atricapillus, and rose-breasted grosbeak Pheucticus ludovicianus were more common and American redstart Setophaga ruticilla, great crested flycatcher Myiarchus crinitus, and Baltimore oriole Icterus galbula were less common in sites with more reed canary grass cover. Bird diversity and abundance were similar between sites with different reed canary grass cover. A stronger divergence in bird assemblages was associated with ground cover ,15%, resulting from prolonged spring flooding. These sites hosted more prothonotary warbler Protonotaria citrea, but they had reduced bird abundance and diversity compared to other sites. Our results indicate that frequently flooded sites may be important for prothonotary warblers and that bird assemblages shift in response to reed canary grass invasion.

  14. Imaging Canary Island hotspot material beneath the lithosphere of Morocco and southern Spain

    Science.gov (United States)

    Miller, Meghan S.; O'Driscoll, Leland J.; Butcher, Amber J.; Thomas, Christine

    2015-12-01

    The westernmost Mediterranean has developed into its present day tectonic configuration as a result of complex interactions between late stage subduction of the Neo-Tethys Ocean, continental collision of Africa and Eurasia, and the Canary Island mantle plume. This study utilizes S receiver functions (SRFs) from over 360 broadband seismic stations to seismically image the lithosphere and uppermost mantle from southern Spain through Morocco and the Canary Islands. The lithospheric thickness ranges from ∼65 km beneath the Atlas Mountains and the active volcanic islands to over ∼210 km beneath the cratonic lithosphere in southern Morocco. The common conversion point (CCP) volume of the SRFs indicates that thinned lithosphere extends from beneath the Canary Islands offshore southwestern Morocco, to beneath the continental lithosphere of the Atlas Mountains, and then thickens abruptly at the West African craton. Beneath thin lithosphere between the Canary hot spot and southern Spain, including below the Atlas Mountains and the Alboran Sea, there are distinct pockets of low velocity material, as inferred from high amplitude positive, sub-lithospheric conversions in the SRFs. These regions of low seismic velocity at the base of the lithosphere extend beneath the areas of Pliocene-Quaternary magmatism, which has been linked to a Canary hotspot source via geochemical signatures. However, we find that this volume of low velocity material is discontinuous along strike and occurs only in areas of recent volcanism and where asthenospheric mantle flow is identified with shear wave splitting analyses. We propose that the low velocity structure beneath the lithosphere is material flowing sub-horizontally northeastwards beneath Morocco from the tilted Canary Island plume, and the small, localized volcanoes are the result of small-scale upwellings from this material.

  15. Seventeen years of monitoring diffuse CO2 emission from the Tenerife North-West Rift Zone (NWRZ) volcano, Canary Islands

    Science.gov (United States)

    Padilla, Germán D.; Evans, Bethany J.; Provis, Aaron R.; Asensio, María; Alonso, Mar; Calvo, David; Hernández, Pedro; Pérez, Nemesio M.

    2017-04-01

    Tenerife together and Gran Canaria are the central islands of the Canarian archipelago, which have developed a central volcanic complex characterized by the eruption of differentiated magmas. Tenerife is the largest of the Canary Islands (2100 km2) and at present, the North-West Rift-Zone (NWRZ) is one of the most active volcanic structures of the three volcanic rift-zone of the island, which has hosted two historical eruptions (Arenas Negras in 1706 and Chinyero in 1909). In order to monitor the volcanic activity of NWRZ, since the year 2000, 49 soil CO2 efflux surveys have been performed at NWRZ (more than 300 observation sites each one) to evaluate the temporal an spatial variations of CO2 efflux and their relationships with the volcanic-seismic activity. Measurements were performed in accordance with the accumulation chamber method. Spatial distribution maps were constructed following the sequential Gaussian simulation (sGs) procedure. To quantify the total CO2 emission from the studied area, 100 simulations for each survey have been performed. We report herein the results of the last diffuse CO2 efflux surveys at the NWRZ undertaken in July and October 2016 to constrain the total CO2 output from the studied area. During July and October 2016 surveys, soil CO2 efflux values ranged from non-detectable up to 32.4 and 53.7 g m-2 d-1, respectively. The total diffuse CO2 output released to atmosphere were estimated at 255 ± 9 and 338 ± 18 t d-1, respectively, values higher than the background CO2 emission estimated on 144 t d-1. Since 2000, soil CO2 efflux values have ranged from non-detectable up to 141 g m-2 d-1, with the highest values measured in May 2005 whereas total CO2 output ranged between 52 and 867 t d-1. Long-term variations in the total CO2 output have shown a temporal correlation with the onsets of seismic activity at Tenerife, supporting unrest of the volcanic system, as is also suggested by anomalous seismic activity recorded in the studied area

  16. Virtual Community, social network and media environment of Canary Isands regional digital newspapers

    Directory of Open Access Journals (Sweden)

    Dr. Francisco Manuel Mateos Rodríguez

    2008-01-01

    Full Text Available The impact of the new communication and information technologies has favoured the creation of multiple local newspaper websites in the Canary Islands, thus making the regional press emerge as an alternative on the rise. This tendency affects significantly both traditional and new editions of the different regional and local newspapers from the Canaries and motivates a different distribution, positioning and development within the local media environment in which these media share a novel dimension of communication with a specific virtual community and social network within the World Wide Web.

  17. J0815+4729: A Chemically Primitive Dwarf Star in the Galactic Halo Observed with Gran Telescopio Canarias

    Science.gov (United States)

    Aguado, David S.; González Hernández, Jonay I.; Allende Prieto, Carlos; Rebolo, Rafael

    2018-01-01

    We report the discovery of the carbon-rich hyper metal-poor unevolved star J0815+4729. This dwarf star was selected from SDSS/BOSS as a metal-poor candidate and follow-up spectroscopic observations at medium resolution were obtained with the Intermediate dispersion Spectrograph and Imaging System (ISIS) at William Herschel Telescope and the Optical System for Imaging and low-intermediate-Resolution Integrated Spectroscopy (OSIRIS) at Gran Telescopio de Canarias. We use the FERRE code to derive the main stellar parameters, {T}{eff}=6215+/- 82 K, and {log}g=4.7+/- 0.5, an upper limit to the metallicity of [Fe/H] ≤ ‑5.8, and a carbon abundance of [C/Fe] ≥ +5.0, while [α /{Fe}]=0.4 is assumed. The metallicity upper limit is based on the Ca II K line, which at the resolving power of the OSIRIS spectrograph cannot be resolved from possible interstellar calcium. The star could be the most iron-poor unevolved star known and also be among the ones with the largest overabundances of carbon. High-resolution spectroscopy of J0815+4729 will certainly help to derive other important elemental abundances, possibly providing new fundamental constraints on the early stages of the universe, the formation of the first stars, and the properties of the first supernovae. Based on observations made with the Gran Telescopio Canarias (GTC), installed in the Spanish Observatorio del Roque de los Muchachos of the Instituto de Astrofísica de Canarias, on the island of La Palma. Program ID GTC90-15B and the Discretionary Director Time GTC03-16ADDT and also based on observations made with the William Herschel Telescope (WHT).

  18. Yolk testosterone, postnatal growth and song in male canaries.

    Science.gov (United States)

    Müller, Wendt; Vergauwen, Jonas; Eens, Marcel

    2008-06-01

    Avian eggs contain substantial amounts of maternal yolk androgens, which have been shown to modulate offspring phenotype. The first studies on the functional consequences of maternal yolk androgens have focused on early life stages and their role in sibling competition. However, recent longitudinal studies reported long-lasting effects of maternal yolk androgens on offspring phenotype, mostly concerning traits that are sensitive to androgens. This suggests that maternal yolk androgens could play an important role in sexual selection, since the expression of many male sexual characters is testosterone-dependent. Using male canaries as a model, we examined the consequences of an experimental elevation of yolk testosterone concentrations on early development as well as long-lasting effects particularly on song, which is one of the most important sexual characters in male songbirds. Elevated yolk testosterone concentrations inhibited male growth, possibly in interaction with an existent ectoparasite exposure. Males hatched from testosterone-treated eggs (T-males) did not have enhanced competitive skills, in contrast to previous studies. The elevation of yolk testosterone concentrations delayed song development but did not affect adult song phenotype. This is intriguing, as yolk testosterone possibly induced developmental stress, which is known to reduce song quality. We hypothesize that yolk testosterone has either no direct effect on adult song phenotype, or that positive effects are merged by the negative effects of developmental stress. Finally, females mated with T-males invested more in their clutch indicating that females either assess T-males as more attractive (differential allocation hypothesis) or compensated for lower offspring viability (compensation hypothesis).

  19. Parakeets, canaries, finches, parrots and lung cancer: no association.

    Science.gov (United States)

    Morabia, A.; Stellman, S.; Lumey, L. H.; Wynder, E. L.

    1998-01-01

    The relationship between pet bird keeping and lung cancer according to exposure to tobacco smoking was investigated in a case-control study in hospitals of New York City and Washington, DC, USA. Newly diagnosed lung cancer cases (n = 887) aged 40-79 years were compared with 1350 controls with diseases not related to smoking, of the same age, gender and date of admission as the cases. The prevalence of pet bird keeping was 12.5% in men and 19.1% in women. There was no association between ever keeping a pet bird and lung cancer in never smokers (men adjusted odds ratio (OR) = 0.70, 95% confidence interval (CI) 0.15-3.17; women, 1.32, 95% CI 0.65-2.70), or in smokers and non-smokers combined, after adjustment for ever smoking (men: 1.28, 95% CI 0.88-1.86; women: 1.17, 95% CI 0.83-1.64; all: 1.21, 95% CI 0.95-1.56). Risk did not increase in relation to duration of pet bird keeping. Cases and controls kept similar types of birds. There was a tenfold increase of lung cancer risk associated with smoking among non-bird keepers (adjusted OR = 9.15). There was no indication of a synergism, either additive or multiplicative, between smoking and pet bird keeping with respect to lung cancer risk. Either alone or in conjunction with smoking, keeping parakeets, canaries, finches or parrots is not a risk factor for lung cancer among hospital patients in New York and in Washington, DC. PMID:9472651

  20. Determinants of specific food consumption in the Canary Islands (Spain).

    Science.gov (United States)

    Núñez-González, Eduardo; Serra-Majem, Lluis; Fika-Hernándo, Mariluz; Fernández-Vallhonrat, Blanca; Bravo-Martínez, José; Martín-Ferrer, Juan M; Chas-Barbeito, Cristina; Bautista-Castaño, Inmmaculada

    2011-10-01

    The consumption of specific functional foods (FF) and some determinants of FF item selection were assessed using a questionnaire administered to 1112 individuals in the Canary Islands (Spain). Food items considered were Milk products: easily digestible milk (or milk low in lactose), milk enriched with vitamins and/or minerals, skimmed milk with soluble fiber, milk with royal jelly, milk with modified fatty acids (omega 3), milk products low in fat, pro-biotic foods (yoghurt and fermented milk) and yoghurt with phytosterols; Cereals: fortified breakfast cereals, wholemeal cereals and energy bars; Drinks: juices and enriched drinks, stimulating drinks and isotonic drinks; DHA-enriched, low cholesterol eggs; Meat products: low salt sausages and cooked low fat ham; Fats: enriched margarine, margarine rich in phytosterols and sunflower oil rich in oleic acid; Condiments: iodated salt. These food items were organized into 7 FF groups (milk products, cereals, fortified drinks, DHA eggs, meat product, fats, condiments). The results indicated that the highest prevalence was fortified drinks (63.6%; 95% CI: 60.7-66.5). Overall FF consumption prevalence was 80.1% (95% CI: 77-83): single FF item consumption being rare. There were significant inter-group relationships, and some group intakes (milk products, cereals and drinks) were related to age but with no overall relationship between consumption and age. The education level was significantly related to the consumption of cereals, drinks, meat products and condiments (χ2 test p = 0.04). Some specific FF item consumption segregated with environment (rural or urban) but with no overall significant relationship between the FF group and environment or gender.

  1. [Estimated prevalence of autism spectrum disorders in the Canary Islands].

    Science.gov (United States)

    Fortea Sevilla, M S; Escandell Bermúdez, M O; Castro Sánchez, J J

    2013-12-01

    To make an initial estimate of the prevalence of autism spectrum disorders (ASDs) among children in the province of Las Palmas (Spain). Descriptive study was conducted on 1,796 children between the ages of 18 and 30 months of age, all part of the Child Health Surveillance of the Canary Islands, more specifically the province of Las Palmas, with a population of 1,090,605. The parents of children involved completed the Spanish version of the Modified Checklist for Autism in Toddlers (M-CHAT/ES) in the paediatric clinic. The positive cases were then diagnosed by experts by means of the Autism Diagnostic Interview-Revised (ADIR) and the Autism Diagnostic Observation Schedule (ADOS). A 0.61% prevalence of ASDs was determined, similar to that reported in previous studies using the same tools. The ratio was six girls for every five boys. This was contrary to the results of previous studies which suggested more boys than girls were affected. This may have been due to the sample size, which will have to be increased in future studies to confirm this outcome. An increased sample size and also spread to other age ranges should be used in order to obtain a more reliable estimate of prevalence. As regards the gender ratio, this could be a result of the small size of the sample researched, and should therefore be confirmed by further studies. Copyright © 2012 Asociación Española de Pediatría. Published by Elsevier Espana. All rights reserved.

  2. Encuesta de portadores de Neisseria meningitidis en el Área de Salud de Gran Canaria

    Directory of Open Access Journals (Sweden)

    García Rojas Amós

    2000-01-01

    Full Text Available FUNDAMENTOS: Se plantea A Conocer la tasa de portadores y los tipos circulantes de Neisseria Meningitidis en la población residente en el área de salud de Gran Canaria. B Conocer el patrón de distribución de estos portadores. MÉTODOS: Se realizó un diseño descriptivo transversal, con un muestreo aleatorio en etapas múltiples y por conglomerados. Se determinó un tamaño muestral mínimo de 707 personas para una prevalencia esperada del 8,6 %, con una confianza del 95,6 % y precisión de 0,02. Asumiendo que un 15 % de las personas no quisieran colaborar, se incrementó el tamaño muestral a 831 personas, distribuidas en cada conglomerado de manera proporcional a la población existente. Este tamaño se distribuyó a su vez, en cuatro grandes grupos de edad y sexo, proporcionalmente a su importancia en cada zona básica de salud seleccionada aleatoriamente. Los individuos de la muestra se identificaban entre los que acudían a las unidades de extracción, y una vez superados los criterios de exclusión se les solicitaba su colaboración voluntaria en el estudio. Si aceptaban, se les cumplimentaba un cuestionario que englobaba diferentes variables de interés epidemiológico y se les realizaba un frotis faríngeo. Al haber seleccionado los equipos de Atención Primaria con muestreo aleatorio simple y seguir el mismo método para elegir los individuos dentro de ellos, la estimación de la prevalencia se realizó mediante estimador no sesgado. RESULTADOS: Se obtuvieron un total de 828 muestras, lo que supuso un 99,6% de las previstas. Salvo tres, todos los individuos seleccionados participaron voluntariamente en el estudio, lo que le confiere una alta representatividad. Todas las cepas obtenidas correspondían a N. Meningitidis Serogrupo B, salvo una identificada como N. Meningitidis Serogrupo C Sero/Subtipo 4:P1.2,5. Las cepas de N. Meningitidis serogrupo B identificadas, correspondían a 25 serosubtipos diferentes. La prevalencia puntual

  3. Evolución de la mortalidad atribuible al tabaco en las Islas Canarias (1975-1994

    Directory of Open Access Journals (Sweden)

    Bello Luján Luis M

    2001-01-01

    Full Text Available Fundamento: El objetivo de este trabajo es describir la mortalidad atribuible al consumo de tabaco en las Islas Canarias durante el periodo 1975-1994. Método: Las defunciones por edad, sexo y causa desde 1975 a 1994 se obtuvieron del Instituto Nacional de Estadística (Movimiento Natural Población. A partir de las Encuestas de Salud de España y Canarias se tomaron los porcentajes de nunca fumadores, fumadores y ex-fumadores de la población canaria por edad y sexo. Los riesgos relativos de muerte se obtuvieron del Cancer Prevention Study II, llevado a cabo en Estados Unidos de América. Se calculó la proporción de muertes atribuibles al tabaco para cada año, sexo y grupo de edad a partir de la fracción atribuible poblacional. Así mismo, se calculó la tendencia de la mortalidad atribuible para dicho periodo expresada como el cambio porcentual medio anual de las tasas de la mortalidad ajustadas por edad, mediante un modelo log-lineal. Resultados: Durante el periodo 1975-1994, el número de fallecimientos atribuidos al tabaco aumentó un 64%. Por grandes causas, se observó en el periodo de estudio, un aumento de las neoplasias del 108%, una disminución de las enfermedades cardiovasculares del 32% y un incremento de las enfermedades respiratorias del 15,5%. Se observó también que el número de fallecidos aumenta con la edad, siendo el grupo de edad de 65 años y más en el que se presentan más muertes por el tabaco. Conclusiones: En las Islas Canarias, más del 20% de todas las muertes en 1994 se pueden atribuir al tabaco. Esto sugiere que las medidas introducidas para controlar el tabaquismo son insuficientes.

  4. Voto dual y abstención diferencial en Canarias: análisis del comportamiento electoral canario

    OpenAIRE

    Luis Melián Rodríguez

    2013-01-01

    El análisis del comportamiento electoral es una de las ramas más importante y prolífera dentro de la Ciencia Política. El objetivo del presente trabajo es realizar por primera vez un análisis descriptivo del comportamiento dentro de los procesos electorales, al Parlamento de Canarias desde 1999 hasta las elecciones de 2007; haciendo un especial hincapié en dos conceptos poco trabajados por la disciplina: el voto dual y la abstención diferencial. Fenómenos que han sido estudiado...

  5. Obesidad, sobrepeso y trastornos de la conducta alimentaria en Gran Canaria: estudio de la población adolescente

    OpenAIRE

    Álvarez-Malé, Mª Luisa

    2015-01-01

    Programa de doctorado: Salud pública (Epidemiología, planificación y nutrición) [ES]Los objetivos de esta tesis fueron hallar cifras de prevalencia de TCA (Trastorno de la Conducta Alimentaria), obesidad y sobrepeso en jóvenes de la isla de Gran Canaria, obtener datos de prevalencia de riesgo de TCA y estudiar los factores asociados a estos problemas. Se seleccionaron al azar 1342 alumnos de entre 12-20 años de diferentes Centros Educativos. Para hallar la prevalencia diagn&o...

  6. Análisis de los factores que determinan la decisión de migrar hacia las Islas Canarias

    Directory of Open Access Journals (Sweden)

    Anastasia Hernández Alemán

    2007-01-01

    Full Text Available En este trabajo y tomando como referencia el análisis neoclásico en el estudio de los movimientos migratorios, se analizan algunas de las variables que determinan el volumen de inmigración en la región canaria. Para ello, se emplea un sistema de ecuaciones estructurales. Se trata de un modelo de desequilibrio en el que las variables de naturaleza económica tienen mayor protagonismo que cualquier otra variable de naturaleza ambiental. Los resultados tienen implicaciones para la política de inmigración y para la investigación futura.

  7. Análisis de los factores que determinan la decisión de migrar hacia las Islas Canarias

    Directory of Open Access Journals (Sweden)

    Anastasia Hernández Alemán

    2007-11-01

    Full Text Available En este trabajo y tomando como referencia el análisis neoclásico en el estudio de los movimientos migratorios, se analizan algunas de las variables que determinan el volumen de inmigración en la región canaria. Para ello, se emplea un sistema de ecuaciones estructurales. Se trata de un modelo de desequilibrio en el que las variables de naturaleza económica tienen mayor protagonismo que cualquier otra variable de naturaleza ambiental. Los resultados tienen implicaciones para la política de inmigración y para la investigación futura.

  8. Compromiso de los adolescentes de Canarias con un estilo de vida físicamente activo y saludable

    OpenAIRE

    López López, Eduardo Luis

    2011-01-01

    Programa de doctorado: Avances en Traumatología [ES] El presente estudio tiene un caracter descriptivo y correlacional y se ha aplicado a una muestra de 800 adolescentes: 413 hombres y 387 mujeras, pertenecientes a la Comunidad Autónoma de Canarias. Las variables que componen la investigación están relacionadas con el estado de salud de este sector de la población; niveles de práctica de actividad física, prevalencia de conductas sedentarias, estado psicológico de bienestar, patrón aliment...

  9. Presencia de rodenticidas anticoagulantes en cinco especies de aves rapaces de las Islas Canarias, 2003-2011

    OpenAIRE

    N Ruiz-Suárez; LD Boada; LA Henríquez-Hernández; M Almeida González; Calabuig, P.; D Estévez-López; M Zumbado; Rodríguez-Hernández, A.; Camacho, M.; OP Luzardo

    2012-01-01

    Se determinó la presencia de residuos de rodenticidas anticoagulantes por cromatografía de líquidos acoplada a espectrometría de masas de triple cuadrupolo en el hígado de 61 aves rapaces muertas provenientes del Centro de Recuperación de Fauna Silvestre de Tafira (Gran Canaria), pertenecientes a 5 especies de las 11 presentes en el archipiélago canario. Se encontraron residuos en 42 animales (69%) si bien en sólo 1 de ellos se consideró la intoxicación por rodenticidas como causa primaria de...

  10. PROPUESTA DE ITINERARIO GEOTURÍSTICO URBANO EN GARACHICO (TENERIFE, CANARIAS, ESPAÑA

    Directory of Open Access Journals (Sweden)

    Fco. Javier Dóniz-Páez

    2016-01-01

    Full Text Available En los destinos maduros de sol y playa los nuevos productos y experiencias turísticas son una realidad actual y necesaria. El geoturismo urbano es un producto de turismo muy novedoso que consiste en explotar turísticamente el relieve presente dentro de las ciudades tanto en afloramientos naturales como en los diferentes elementos del patrimonio cultural tangible inmueble. El objetivo de este artículo es diseñar y proponer un itinerario de geoturismo urbano con base espacial por el casco histórico de Garachico (Tenerife, Canarias, España, asociado directa e indirectamente con la erupción volcánica de 1706 y que contribuya a diversificar su oferta turística polarizada en sus atractivos históricos. Para ello la metodología utilizada consistió en el inventario, caracterización y valoración del patrimonio geológico-geomorfológico presente en los diferentes geomorfositios y en el patrimonio cultural tangible inmueble del casco histórico de la ciudad. Se seleccionaron catorce recursos naturales y culturales vinculados con la geodiversidad de Garachico. En función de la variedad de recursos inventariados, de las posibilidades que ofrece y de su distribución geográfica, el itinerario propuesto en formato de ruta abierta recorre los catorce atractivos seleccionados a lo largo de unos 2 km de longitud y de tres horas de duración.

  11. Evidence for long-term uplift on the Canary Islands from emergent Mio Pliocene littoral deposits

    Science.gov (United States)

    Meco, Joaquín; Scaillet, Stéphane; Guillou, Hervé; Lomoschitz, Alejandro; Carlos Carracedo, Juan; Ballester, Javier; Betancort, Juan-Francisco; Cilleros, Antonio

    2007-06-01

    Several islands in the Canarian archipelago show marine deposits with identical fossil faunas, which are generally assigned to different glacioeustatic marine episodes: mainly Pleistocene episodes in Lanzarote and Fuerteventura, and Mio-Pliocene ones in Gran Canaria. Three fossil species ( Saccostrea chili, Nerita emiliana and Strombus coronatus) characterize all the marine deposits from southern Lanzarote, to the west and south of Fuerteventura and northeast of Gran Canaria. Three other species ( Ancilla glandiformis, Rothpletzia rudista and Siderastraea miocenica) confirm the chronostratigraphic attribution of these deposits. Other more occasional fossils (as Chlamys latissima, Isognomon soldanii and Clypeaster aegyptiacus) fit an upper Miocene and lower Pliocene age. This agrees with new K/Ar ages obtained from pillow lavas emplaced into the marine deposits (ca. 4.1 Ma in Gran Canaria, ca. 4.8 Ma in Fuerteventura) and from underlying (ca. 9.3 Ma in Gran Canaria) or overlying (ca. 9.8 Ma in Lanzarote) lava flows. The marine deposits are eroded but large continuous segments are preserved sloping gently towards the coast. Variations in the highest and the lowest elevations of the deposits apsl (above present sea level) indicate post-depositional uplift movements. Glacioeustatic causes are unlikely to be responsible for these variations on the basis of the coastal location of the deposits and their equatorial fauna characteristic of Mio-Pliocene corals. Differential uplift of the deposits across the archipelago is argued to result from the progressive seaward tilting of the islands along the insular volcanic trail marking the westward migration of hot spot head since 20 Ma. Successive westward accretion of younger volcanic edifices resulted in increasing lithostatic load of the crust with progressive (diachronous) tilting of the older edifices and their palaeo-shorelines marked by past coastal deposits.

  12. Estudio sobre los acuerdos de partenariado económico: incidencia en el Espacio Geográfico de Canarias. Resumen Ejecutivo

    OpenAIRE

    Gobierno de Canarias. Dirección General de Asuntos Económicos con la Unión Europea

    2006-01-01

    Acuerdo que identifique los ámbitos de importancia para Canarias en los intercambios regionales de su entorno, reflejándolos en un documento que recoja los intereses específicos de Canarias, los sectores y actividades que se consideren sensibles y propuestas concretas que puedan ser tenidas en cuenta por la comisión en relación con los Acuerdos de Partenariado Econónico (APE) que se negocian con los bloques regionales con los que se mantienen intercambios, en especial con la Comunidad Económ...

  13. Estudio de la tormenta tropical “Delta” y su transición extratropical: efectos meteorológicos en Canarias

    OpenAIRE

    Martín León, Francisco; Alejo Herrera, Cristo José; Bustos, Juan José de; Calvo Sánchez, Francisco Javier; Sanambrosio Beirán, José Ismael; Sánchez-Laulhé, José María; Santos Muñoz, Daniel

    2005-01-01

    Los días 28 y 29 de noviembre del 2005 la tormenta tropical "Delta" afectó a las islas Canarias con vientos que llegaron a alcanzar los 150 km por hora en las costas y cercanos a los 250 en zonas altas de la isla de Tenerife. El INM publica su informe final sobre la tormenta tropical "Delta". Los días 28 y 29 de noviembre del año 2005 la tormenta tropical "Delta" afectó a las islas Canarias con vientos que llegaron a alcanzar los 150 km por hora en las costas y cercanos a los 250 en zonas...

  14. El silbo gomero. Tradición viva de la cultura canaria y Patrimonio de la Humanidad

    Directory of Open Access Journals (Sweden)

    Plasencia Martín, Moisés

    2007-01-01

    Full Text Available The Silbo Gomero is a substitute, a contracted form, spontaneous and a non-conventional language. It is able to transmit and to interchange a limitless range of messages over long distances by means of whistles, being reproduced by the sonorous characteristics of a spoken language. At the present time this primary language is the Spanish spoken in the Canary Islands. Government of Canary has recently implemented a large number of activities which started with the intention to show the Silbo Gomero as an artistic source and to encourage scientific research on this whistled language. One of the most significant measures taken by General Direction for Cooperation and Cultural Patrimony has to do with a proposal to UNESCO in order to consider the Silbo Gomero as a Master Piece of the Oral and Intangible World Heritage

  15. Population Structure, Genetic Diversity, and Evolutionary History of Kleinia neriifolia (Asteraceae on the Canary Islands

    Directory of Open Access Journals (Sweden)

    Ye Sun

    2017-06-01

    Full Text Available Kleinia neriifolia Haw. is an endemic species on the Canarian archipelago, this species is widespread in the coastal thicket of all the Canarian islands. In the present study, genetic diversity and population structure of K. neriifolia were investigated using chloroplast gene sequences and nuclear SSR (simple sequence repeat. The differentiation among island populations, the historical demography, and the underlying evolutionary scenarios of this species are further tested based on the genetic data. Chloroplast diversity reveals a strong genetic divergence between eastern islands (Gran Canaria, Fuerteventura, and Lanzarote and western islands (EI Hierro, La Palma, La Gomera, Tenerife, this west–east genetic divergence may reflect a very beginning of speciation. The evolutionary scenario with highest posterior probabilities suggests Gran Canaria as oldest population with a westward colonization path to Tenerife, La Gomera, La Palma, and EI Hierro, and eastward dispersal path to Lanzarote through Fuerteventura. In the western islands, there is a slight decrease in the effective population size toward areas of recent colonization. However, in the eastern islands, the effective population size increase in Lanzarote relative to Gran Canaria and Fuerteventura. These results further our understanding of the evolution of widespread endemic plants within Canarian archipelago.

  16. Geología y vulcanología de La Palma y El Hierro, Canarias Occidentales

    OpenAIRE

    Pérez Torrado, F. J.; de la Nuez, J.; Guillou, H.; Badiola, E. R.; Carracedo, J.C

    2001-01-01

    The western Canaries, relatively little studied until a few years ago from the geological point of view, have however provided decisive data for understanding many of the most important geological problems of the Archipelago, which would probably have been dilucidated earlier, had the study begun with the most recent islands, as occurs in similar chains of oceanic volcanic islands in other parts of the world. To summarize the main geological features and evolutionary characteristics of both i...

  17. La élite parlamentaria de Canarias: perfil sociodemográfico

    Directory of Open Access Journals (Sweden)

    Javier Sánchez Herrera

    2004-11-01

    Full Text Available En général, les recherches contemporaines sur les élites soulignent l'existence d'une série de données basiques qui leur sont propres : genre masculin, origines sociales établies, formation supérieure, centres éducatifs de qualité, âge mûre, résidences dans des quartiers aristocratiques, professions typiques (juristes, professeurs, bureaucrates, cadre supérieur, etc.. Dans ce travail, après la présentation de l'histoire sociopolitique des iles Canaries, qui refléte une préoccupation sur le plan de l'égalité des opportunités, nous étudions les participants de cette élite parlementaire dans les iles, sur le plan des catégories suivantes : classe sociale, âge, genre, origine régionale, mobilité sociale, niveau d'études, profession et lieu de domicile.

  18. The conditions for use of reed canary grass briquettes and chopped reed canary grass in small heating plants; Foerutsaettningar foer anvaendning av roerflensbriketter och hackad roerflen i mindre vaermecentraler

    Energy Technology Data Exchange (ETDEWEB)

    Paulrud, Susanne; Davidsson, Kent; Holmgren, Magnus A. (Swedish National Testing and Research Inst., Boraas (Sweden)); Hedman, Henry; Oehman, Rikard; Leffler, Joel (ETC, Piteaa (Sweden))

    2010-09-15

    The aim of this study was to test fuel blends of briquettes and chopped reed canary grass in three existing heating plants (50 kW - 500 kW) and elucidate the requirements for good performance and low emissions. In addition, the study investigated production of reed canary grass briquettes using a Polish screw press developed for straw. Some tests with a bale shredder were also undertaken. The screw press technique is of interest for reed canary grass because it is a simple technique, easy to handle, developed for small scale production, and for straw. The test with reed canary grass in this study showed that the technique worked well but that further adjustments and a longer test period are needed in order to achieve higher bulk density and mechanical strength. The test with chopped reed canary grass shows that a system with a forage harvester is slightly more effective than baling and cutting in a bale shredder. The study concluded that few existing heating plants of size 50 kW-1 MW that currently use wood fuels will be able to use reed canary grass without adjustment, conversion or replacement of the combustion equipment. Reed canary grass has 15-20 times higher ash content than wood briquettes and 2-3 times higher ash content than forest residue; the combustion equipment must be able to handle these properties. The boiler must be equipped with a continuously operating ashing system and it must be possible to move the ash bed mechanically. There is a risk of high content of unburned matter if the residence time in the boiler is too short, due to the structure and low bulk density of the reed canary grass ash. Using a blend of wood briquettes and reed canary briquettes results in lower ash content, but also affects the ash chemistry and tends to lower the initial ash fusion temperature compared to using 100 % reed canary grass. Blending chopped reed canary grass and wood chips in an existing small scale heating plant also requires measures to achieve an even fuel

  19. Demographic history of Canary Islands male gene-pool: replacement of native lineages by European

    Directory of Open Access Journals (Sweden)

    Amorim António

    2009-08-01

    Full Text Available Abstract Background The origin and prevalence of the prehispanic settlers of the Canary Islands has attracted great multidisciplinary interest. However, direct ancient DNA genetic studies on indigenous and historical 17th–18th century remains, using mitochondrial DNA as a female marker, have only recently been possible. In the present work, the analysis of Y-chromosome polymorphisms in the same samples, has shed light on the way the European colonization affected male and female Canary Island indigenous genetic pools, from the conquest to present-day times. Results Autochthonous (E-M81 and prominent (E-M78 and J-M267 Berber Y-chromosome lineages were detected in the indigenous remains, confirming a North West African origin for their ancestors which confirms previous mitochondrial DNA results. However, in contrast with their female lineages, which have survived in the present-day population since the conquest with only a moderate decline, the male indigenous lineages have dropped constantly being substituted by European lineages. Male and female sub-Saharan African genetic inputs were also detected in the Canary population, but their frequencies were higher during the 17th–18th centuries than today. Conclusion The European colonization of the Canary Islands introduced a strong sex-biased change in the indigenous population in such a way that indigenous female lineages survived in the extant population in a significantly higher proportion than their male counterparts.

  20. The Miner's Canary: A Critical Race Perspective on the Representation of Black Women Full Professors

    Science.gov (United States)

    Croom, Natasha; Patton, Lori

    2012-01-01

    This article examines experiences of a Black woman full professor, and the benefits and privileges associated with reaching this rank. Its purpose is to leave little room for conjecture about the rank and those who have earned it. Using critical race theory and a critical race feminism framework coupled with the concept of the miner's canary, we…

  1. Influence of social conditions in song sharing in the adult canary.

    Science.gov (United States)

    Lehongre, Katia; Aubin, Thierry; Del Negro, Catherine

    2009-11-01

    In songbirds, experience of social and environmental cues during a discrete period after birth may dramatically influence song learning. In the canary, the ability to learn new songs is assumed to persist throughout life. The aim of the present study was to investigate whether social context could guide changes in adult song. Three groups of canaries were kept in different social and temporal conditions. Results showed that the multiple hierarchical levels of the canary song structure were affected by social environment: songs of males housed together for 2 years were more similar than those of males that spent the same time in individual cages in regard to acoustic parameters, syllable repertoire and repertoire of sequences of two-syllable types. However, social housing did not result in the emergence of a group-specific vocal signature within songs. In conclusion, these results suggested that under the influence of social factors, a copying process could allow adult canaries to adjust, at least in part, their songs to those of other individuals.

  2. Canine Leishmania infantum infection: an imported case in UK after staying in the Canary Islands.

    Science.gov (United States)

    Dandrieux, J R S; Sacchini, F; Harms, G; Globokar, M; Balzer, H-J; Pantchev, Nikola

    2017-11-21

    Leishmaniosis is reported in the Iberian Peninsula and the Balearic Islands, but the Canary Islands are deemed free. In the present communication, we report a clinical leishmaniosis due to Leishmania infantum in a dog that was presumptively infected during its stay on Tenerife. The result of Leishmania serology (whole-cell based ELISA with L. infantum antigen) was high positive (test score of 82.2 at a cut-off value of 12.0). This result was further confirmed with quantitative real-time polymerase chain reaction (qPCR) for Leishmania spp. on a blood sample. A medium load of parasites was detected (48 parasites/ml blood). L. infantum was identified by RFLP analysis of the ITS-1 PCR product. Confirmation that leishmaniosis is endemic to the Canary Islands would further require study on local dogs with no travel history as well as reassessment on frequency and distribution of Phlebotomus spp. as well as Leishmania spp. detection in the sand fly vector. However, this case strongly suggests that L. infantum is present on the Canary Islands. Although transmission seems to be still exceptional, preventive measures in dogs travelling to the Canaries should be considered.

  3. Teachers' Opinions of Student Dropout from Formal Music Education Centres of the Canary Islands

    Science.gov (United States)

    Lorenzo Socorro, Sonia; Escandell Bermúdez, María Olga; Castro Sánchez, José Juan

    2016-01-01

    One hundred and eighty-five teachers were surveyed to determine their opinion of student dropout from formal music centres in the Canary Islands. The goal of the study was to investigate the causes of dropout and strategies to prevent it. Teachers' opinions were collected by means of a questionnaire. The influence of the environment on the…

  4. Boring sponges (Porifera, Clionidae) collected during the "Tydeman" Canary Islands expedition Cancap-II, 1977

    NARCIS (Netherlands)

    Groot, de R.A.

    1980-01-01

    INTRODUCTION AND MATERIAL The boring sponges of the Canary Islands have never been studied in any detail, but the boring fauna of this archipelago cannot be expected to be very rich. All islands are volcanic and calcareous rocks are not common. Consequently, in most areas large shells and rhodophyte

  5. New xenophytes from La Palma (Canary Islands, Spain), with emphasis on naturalized and (potentially) invasive species

    OpenAIRE

    Otto, R.; Verloove, F.

    2016-01-01

    Many years of field work in La Palma (western Canary Islands) yielded a number of interesting new records of non-native vascular plants. Amaranthus blitoides, A. deflexus, Aptenia cordifolia, Argemone ochroleuca, Begonia schmidtiana, Capsella rubella, Cardamine hamiltonii, Centratherum punctatum, Cerastium fontanum subsp. vulgare, Chasmanthe floribunda (widely confused with C. aethiopica and Crocosmia xcrocosmiiflora in Macaronesia), Chenopodium probstii, Commelina latifolia var. latifolia, D...

  6. Age and sex dimorphism in the Canary Blue Tit Cyanistes teneriffae ...

    African Journals Online (AJOL)

    ... 100% correctly classified) but for practical sexing in the field it is recommended to use wing length as a reliable sexing criterion (wing length >62.5 = male, 96% correctly classified). This high degree of sexual size dimorphism observed suggests a high sexual selection in the Canary Blue Tit. OSTRICH 2010, 81(1): 51–57 ...

  7. Capture of the Canary mantle plume material by the Gibraltar arc mantle wedge during slab rollback

    NARCIS (Netherlands)

    Mériaux, C.A.; Duarte, João C.; Duarte, S.S.; Schellart, W. P.; Chen, Z; Rosas, F.; Mata, J.; Terrinha, P.

    2015-01-01

    Recent evidence suggests that a portion of the Canary plume travelled northeastwards below the lithosphere of the Atlas Mountains in North Africa towards the Alboran domain and was captured-10 Ma ago by the Gibraltar subduction system in the Western Mediterranean. The capture would have been

  8. In search of greener pastures? Boat-migrants from Senegal to the Canary Islands

    NARCIS (Netherlands)

    Poeze, M.

    2010-01-01

    This Masters thesis is the winner of the ASC's Africa Thesis Award 2009. It examines the decision-making process of Senegalese men to make use of the dangerous boat journey to the Canary Islands in an effort to reach Europe. Moving beyond conventional micro- and macro-theories on migration

  9. Revision of the Cerobasis annulata group (Psocoptera: Trogiidae) from the Canary Islands

    NARCIS (Netherlands)

    Baz, A.

    1993-01-01

    The species of the Cerobasis annulata group from the Canary Islands are revised. A key to the seven species is provided; the Holarctic C. annulata is added for comparison. Five new species are described: Cerobasis rosae spec. nov., C. ericaceus spec. nov., C. anagaensis spec. nov., C. longicornis

  10. The genus Alvania on the Canary islands and Madeira (Mollusca: Gastropoda), part 2 [final part

    NARCIS (Netherlands)

    Moolenbeek, R.G.; Hoenselaar, H.J.

    1998-01-01

    Five Alvania species from the Canary Islands and the Madeira Archipelago are revised. A new species to science, A. johannae is described and for three species lectotypes are designated. Altogether 13 littoral alvaniids are presently known from this area. Doubtful records are enumerated and a list of

  11. A new species of Sarcodictyon (Anthozoa: Stolonifera) from Tenerife, Canary Islands

    NARCIS (Netherlands)

    Ocaña, O.; Brito, A.; Nuñez, J.

    1992-01-01

    A new species of Stolonifera, Sarcodictyon canariensis, from Tenerife, Canary Islands, is described and illustrated. It is characterized by its large size, the form of its sclerites and internal anatomy. The material was collected at a depth of 95-130 m in the community of Dendrophyllia ramea

  12. "Canary in a coal mine" : monitoring air quality and detecting environmental incidents by harvesting Twitter

    NARCIS (Netherlands)

    Smid, H.; Mast, P.; Tromp, M.; Winterboer, A.; Evers, V.

    2011-01-01

    We present an application that facilitates environmental monitoring by and for the general public. 'Canary in a Coal Mine' (CIACM) gathers and analyses pollution-related tweets in real-time from the micro-blogging platform Twitter and visualizes temporal and spatial characteristics of the data.

  13. Late Pliocene and Quaternary Eurasian locust infestations in the Canary Archipelago

    Science.gov (United States)

    Meco, J.; Muhs, D.R.; Fontugne, M.; Ramos, A.J.; Lomoschitz, A.; Patterson, D.

    2011-01-01

    The Canary Archipelago has long been a sensitive location to record climate changes of the past. Interbedded with its basalt lavas are marine deposits from the principal Pleistocene interglacials, as well as aeolian sands with intercalated palaeosols. The palaeosols contain African dust and innumerable relict egg pods of a temperate-region locust (cf. Dociostaurus maroccanusThunberg 1815). New ecological and stratigraphical information reveals the geological history of locust plagues (or infestations) and their palaeoclimatic significance. Here, we show that the first arrival of the plagues to the Canary Islands from Africa took place near the end of the Pliocene, ca. 3Ma, and reappeared with immense strength during the middle Late Pleistocene preceding MIS (marine isotope stage) 11 (ca. 420ka), MIS 5.5 (ca. 125ka) and probably during other warm interglacials of the late Middle Pleistocene and the Late Pleistocene. During the Early Holocene, locust plagues may have coincided with a brief cool period in the current interglacial. Climatically, locust plagues on the Canaries are a link in the chain of full-glacial arid-cold climate (calcareous dunes), early interglacial arid-sub-humid climate (African dust inputs and locust plagues), peak interglacial warm-humid climate (marine deposits with Senegalese fauna), transitional arid-temperate climate (pedogenic calcretes), and again full-glacial arid-cold climate (calcareous dunes) oscillations. During the principal interglacials of the Pleistocene, the Canary Islands recorded the migrations of warm Senegalese marine faunas to the north, crossing latitudes in the Euro-African Atlantic. However, this northward marine faunal migration was preceded in the terrestrial realm by interglacial infestations of locusts. ??? Locust plagues, Canary Islands, Late Pliocene, Pleistocene, Holocene, palaeoclimatology. ?? 2010 The Authors, Lethaia ?? 2010 The Lethaia Foundation.

  14. Los orígenes del Instituto provincial de higiene de las Canarias orientales y la sanidad municipal (1926-1927: cambios estructurales y asistenciales

    Directory of Open Access Journals (Sweden)

    Martín del Castillo, Juan Francisco

    2005-12-01

    Full Text Available The «Instituto Provincial de Higiene de las Canarias Orientales» is an example of Estatuto Provincial of José Calvo Sotelo (1925. Involved in administrative affaires and economical distributions between the Townhall of Las Palmas de Gran Canaria and Insular Council, its beginning is labour of Doctor Antonio Ortiz de Landázuri, in that moment Health Inspector. In this paper, be described the structure and functions of Hygiene Institute, so the change of technical members of laboratories and stations of previous town health services.

    El Instituto Provincial de Higiene de las Canarias Orientales es un ejemplo de la puesta en marcha del Estatuto Provincial de José Calvo Sotelo (1925. Envuelto en medidas administrativas y repartos financieros entre el Ayuntamiento de Las Palmas de Gran Canaria y el Cabildo Insular, su inicio es obra directa del doctor Antonio Ortiz de Landázuri, en aquellos momentos al cargo de la Inspección de Sanidad. En el presente, quedan descritos la estructura y funciones del Instituto de Higiene, además del pase de los miembros facultativos de los laboratorios y estaciones de anteriores servicios municipales del ramo.

  15. Geochemical and mineralogical evidence for Sahara and Sahel dust additions to Quaternary soils on Lanzarote, eastern Canary Islands, Spain

    Science.gov (United States)

    Muhs, D.R.; Budahn, J.; Skipp, G.; Prospero, J.M.; Patterson, D.; Bettis, E. Arthur

    2010-01-01

    Africa is the most important source of dust in the world today, and dust storms are frequent on the nearby Canary Islands. Previous workers have inferred that the Sahara is the most important source of dust to Canary Islands soils, with little contribution from the Sahel region. Soils overlying a late Quaternary basalt flow on Lanzarote, Canary Islands, contain, in addition to volcanic minerals, quartz and mica, exotic to the island's bedrock. Kaolinite in the soils also likely has an exotic origin. Trace-element geochemistry shows that the soils are derived from varying proportions of locally derived basalt and African dust. Major-element geochemistry, clay mineralogy and interpretation of satellite imagery suggest that dust additions to the Canary Islands come not only from the Sahara Desert, but also from the Sahel region. ?? Published 2010. This article is a US Government work and is in the public domain in the USA.

  16. Siliceous alterations of the Montana Senalo lavas, Timanfaya eruption (1730-1736) (Lanzarote, Canary Islands); Las alteraciones siliceas de las lavas de Montana Senalo, eruption de Timanfaya (1730-1736) (Lanzarote, Islas Canarias)

    Energy Technology Data Exchange (ETDEWEB)

    Carmona, J.; Romero, C.; Doniz, J.; Garcia, A.

    2009-07-01

    The presence of hydrothermal alterations within the lavas of Timanfaya eruption (1730-1736), with high proportions of quartz and opal, suggests the effective circulation of hot fluids. The source of these fluids would be located under the island, where silica would be dissolved from sandstones and radiolarites, moving this way towards the surface as Si(OH){sub 4} colloids. Study of opal indicates the presence of A-initial CT and C phases in the collected samples, which, considering the time needed for producing this phase transformations in the diagenetic evolution of opal (10,000-50,000 years), suggests an accelerating process, probably related with either the presence of fluid circulation or weathering processes. Such circumstances are necessary for explaining the presence of such components affecting 300 years old lavas. (Author) 36 refs.

  17. Insular stock identification of Serranus atricauda (Pisces: Serranidae through the presence of Ceratothoa steindachneri (Isopoda, Cymothoidae and Pentacapsula cutanea (Myxozoa, Pentacapsulidae in the Canary Islands

    Directory of Open Access Journals (Sweden)

    Concepción Cuyás

    2004-03-01

    Full Text Available Ceratothoa steindachneri (Isopoda: Cymothoidae and Pentacapsula cutanea (Myxozoa: Pentacapsulidae parasites infecting the blacktail-comber (Serranus atricauda were considered suitable as biological tags for stock identification around the islands of La Palma and Gran Canaria, in the Western and Eastern areas of the Canarian archipelago, respectively. The ecological parameters of both species differed significantly between the islands. While individuals caught off La Palma showed a high degree of infection by the isopod, a single infected fish was found off Gran Canaria. Also, the myxozoans showed a high level of infection on fish from Gran Canaria but it was reported on only a single specimen from La Palma

  18. Studi Gaya Vintage Pada Interior Cafe Di Surabaya. (Studi Kasus : Canary Cafe, DailySweet Cafe Dan Stilrod Cafe)

    OpenAIRE

    Mariana Wibowo, Lia Monica Tejo

    2014-01-01

    Research studies is about the application of vintage style in some cafe in Surabaya aims to determine the application of vintage design styles contained in the interior of the cafe Carpentier Kitchen , Canary Cafe , Daily Sweet Cafe , and Stilroad Cafe . Research studies of vintage style design will be carried out in Surabaya with a case study that some cafe in Surabaya that meets the criteria of vintage design styles , including the Carpentier Kitchen , Canary Cafe , Daily Sweet Cafe , and S...

  19. Geología y vulcanología de La Palma y El Hierro, Canarias Occidentales

    Directory of Open Access Journals (Sweden)

    Pérez Torrado, F. J.

    2001-12-01

    Full Text Available The western Canaries, relatively little studied until a few years ago from the geological point of view, have however provided decisive data for understanding many of the most important geological problems of the Archipelago, which would probably have been dilucidated earlier, had the study begun with the most recent islands, as occurs in similar chains of oceanic volcanic islands in other parts of the world. To summarize the main geological features and evolutionary characteristics of both islands we emphasize the following stages of development: During the Pliocene, a submarine volcanic edifice or seamount formed in the island of La Palma, made up of pillow lavas, pillow breccias and hyaloclastites, intruded by trachytic domes, plugs of gabbros, and a highly dense dyke swarm. The intense magmatic and dyke intrusion uplifted the searnount up to 1,500 m, tilting it 45-50" to the SW. This intrusive phase was followed by a period of quiescence and erosion of the emerged submarine edifice. The definitive consolidation and progression of the construction of the island continued from at least 1.77 ma in angular and erosive discordance over the submarine basement. The subaerial volcanic reactivation, in which explosive volcanism predominated during the initial stages, producing abundant volcanoclastic and phreatomagmatic materials at the base of the subaerial edifice, persisted in a highly continuous manner until at least 0.41 ma. This initial subaerial stage shaped the northern volcanic shield, formed by the accumulation of several superimposed volcanoes, approximately concentric in relation to one another and the submarine basement. The initial stage of the northern volcanic shield lasted between 1.77 and 1.20 ma, during which period the Garafía volcano was built to a height of 2,500-3,000 m, with steeply sloping flanks, formed predominantly by alkaline basalts with abundant pahoehoe lavas. The rapid growth and progressive instability of the Garaf

  20. ESTILO DE VIDA Y ADHERENCIA AL TRATAMIENTO DE LA POBLACIÓN CANARIA CON DIABETES MELLITUS TIPO 2

    Directory of Open Access Journals (Sweden)

    Antonio Cabrera de León

    2009-01-01

    Full Text Available Fundamento: la población canaria sufre la mayor mortalidad por diabetes tipo 2 (DM2 en España. El objetivo de este estudio es conocer el estilo de vida de las personas diabéticas del archipiélago y su adherencia al tratamiento, así como la DM2 desconocida. Métodos: estudio transversal de 6.729 personas de la población general participantes en la cohorte "CDC de Canarias" (edad 18-75 años. Se obtuvieron sus antecedentes médicos, dieta, actividad física, medicamentos consumidos, tabaco, etc. Resultados: la prevalencia de DM2 fue 12% en varones y 10% en mujeres (p=0,005. El 22%de varones y 9% de mujeres desconocían su enfermedad (p<0,001. Sumando DM2 desconocida, DM2 no tratada e incumplimiento terapéutico, el 48% de los hombres y 28% en mujeres no seguían tratamiento correcto. Los varones diabéticos eran más obesos que los no diabéticos (45 versus 25%; p<0,001 pero no presentaban diferencias en tabaquismo (28%; IC95%=23-33 o sedentarismo (62%; IC95%=56-68. Las mujeres diabéticas también eran más obesas (54 versus 27%; p<0,001 y, aunque fumaban menos (11 versus 22%; p<0,001, eran igual de sedentarias (75%; IC95%=70-79. La ingesta calórica era menor en quienes sufrían DM2 (p<0,001, pero el 93% (IC95%=91-95 superaba el consumo recomendado de grasas saturadas y el 69% (IC95%=65-72 padecía síndrome metabólico. Conclusiones: la población diabética en Canarias es sedentaria y obesa, muestra un consumo alto de grasas saturadas y gran prevalencia de síndrome metabólico. El porcentaje que sigue tratamiento regular es muy bajo, sobretodo en varones, que además mantienen el tabaquismo.

  1. Promoción turística a través del sector audiovisual. El caso de Canarias

    Directory of Open Access Journals (Sweden)

    Lic. María Teresa Sandoval Martín

    1998-01-01

    Full Text Available El cine ha posibilitado desde su nacimiento, en 1895, la divulgación por todo el mundo de imágenes de los lugares más célebres y remotos del planeta. En España, principalmente durante la dictadura de Primo de Rivera, la producción de filmes por provincias iría en incremento. Concretamente en Canarias, por aquel entonces, comenzaba a tomarse conciencia del poder que tenía la gran pantalla como medio de promoción turística. Pero no existió el suficiente apoyo institucional, por lo que serían los documentales realizados por empresas privadas -en su mayoría foráneas- los que contribuirían a difundir las primeras imágenes de estas islas en el exterior. Las películas de ficción y los documentales antiguos no siempre ofrecieron un retrato positivo del archipiélago, al igual que ocurriría mucho más tarde con algunos reportajes y programas difundidos por televisión, aunque estos son sólo casos aislados. La mayoría de las veces su aportación a la promoción de Canarias ha sido significativa. Destacan, sobre todo, las películas de argumento (cinematográficas y televisuales de directores de diferentes nacionalidades que situaban la acción real en las islas y en las que se narraban historias protagonizadas por grupos de veraneantes. No obstante, la mayor parte de los largometrajes más famosos internacionalmente utilizaron las variadas localizaciones de este territorio para representar otros lugares. Aún así, la publicación de artículos en la prensa extranjera sobre el desarrollo de los rodajes favorecería la divulgación de sus singularidades. Además de este tipo de promoción indirecta, las instituciones canarias han venido realizando desde principios de la década de los noventa originales campañas de promoción a través del sector audiovisual de demostrada eficacia. Asimismo, la calidad de las producciones cinematográficas realizadas por canarios en los últimos años ha posibilitado que hayan sido seleccionadas en

  2. On the problem of type 2 diabetes-related mortality in the Canary Islands, Spain. The DARIOS Study.

    Science.gov (United States)

    Marcelino-Rodríguez, Itahisa; Elosua, Roberto; Pérez, María del Cristo Rodríguez; Fernández-Bergés, Daniel; Guembe, María Jesús; Alonso, Tomás Vega; Félix, Francisco Javier; González, Delia Almeida; Ortiz-Marrón, Honorato; Rigo, Fernando; Lapetra, José; Gavrila, Diana; Segura, Antonio; Fitó, Montserrat; Peñafiel, Judith; Marrugat, Jaume; de León, Antonio Cabrera

    2016-01-01

    To compare diabetes-related mortality rates and factors associated with this disease in the Canary Islands compared with other 10 Spanish regions. In a cross-sectional study of 28,887 participants aged 35-74 years in Spain, data were obtained for diabetes, hypertension, dyslipidemia, obesity, insulin resistance (IR), and metabolic syndrome. Healthcare was measured as awareness, treatment and control of diabetes, dyslipidemia, and hypertension. Standardized mortality rate ratios (SRR) were calculated for the years 1981 to 2011 in the same regions. Diabetes, obesity, and hypertension were more prevalent in people under the age of 64 in the Canary Islands than in Spain. For all ages, metabolic syndrome and insulin resistance (IR) were also more prevalent in those from the Canary Islands. Healthcare parameters were similar in those from the Canary Islands and the rest of Spain. Diabetes-related mortality in the Canary Islands was the highest in Spain since 1981; the maximum SRR was reached in 2011 in men (6.3 versus the region of Madrid; pCanary Islands population than in any other Spanish region. The high mortality and prevalence of IR warrants investigation of the genetic background associated with a higher incidence and poor prognosis for diabetes in this population. The rise in SRR calls for a rapid public health policy response. Copyright © 2015 Elsevier Ireland Ltd. All rights reserved.

  3. El Proyecto Humboldt: Una biblioteca digital para las expediciones científicas a las Islas Canarias*

    Directory of Open Access Journals (Sweden)

    Markus Schnoepf

    2005-04-01

    Full Text Available Article in Spanish, Abstracts in English, Spanish and German.The Proyecto Humboldt offers since 2002 a growing digital library for the investigation of the european scientific voyages to the Canary Islands between 1700 and 1900. The library is led by the Open Access spirit. Some results of the research work of the last years will be presented in this text. General comments on digital libraries and coming developments will be discussed in another part. Finally the special relationship of the humanities and computer-aided work will be looked at.

  4. Canarias en el contexto de las navegaciones atlánticas de la Antigüedad

    Directory of Open Access Journals (Sweden)

    Víctor M. Guerrero Ayuso

    2008-01-01

    Full Text Available El presente artículo pretende analizar, desde perspectivas náuticas, los problemas de acceso a las islas Canarias con la tecnología propiade la protohistoria y la antigu?edad; por extensión, se estudia también las navegaciones antiguas por la cota africana hasta la actualMogador. Se hace una revisión crítica de las hipótesis mantenidas hasta ahora por algunos investigadores, según las cuales las islashabrían tenido una ocupación fenicia y púnica de las islas. Por último, se analizan grabados rupestres canarios de temática naval, algunosde los cuales pudieron corresponder a barcas aborígenes.

  5. Final outcome of raptors admitted to the Tafira Wildlife Rehabilitation Center, Gran Canaria Island, Spain (2003–2013

    Directory of Open Access Journals (Sweden)

    Montesdeoca, N.

    2017-05-01

    Full Text Available The outcomes of wild raptors admitted to the Tafira Wildlife Rehabilitation Center in Gran Canaria Island, Spain, from 2003 to 2013 were analyzed using a quality auditing system based on the crude and stratified (by causes of admission rates of four final outcome categories, time until death and length of stay as quality indicators. The outcome categories were: euthanasia (Er = 19.78%; unassisted mortality during hospitalization (Mr = 22.20%; release (Rr = 57.57%; and permanent captivity (Cr = 0.46%. Taking into account the particular vulnerability of insular raptor species and the high Rr achieved, findings from this study emphasize the importance of wildlife rehabilitation centers for the medical management of injured raptors and the subsequent release of rehabilitated individuals into the wild.

  6. Optical design of FRIDA, the integral-field spectrograph and imager for the AO system of the Gran Telescopio Canarias

    Science.gov (United States)

    Cuevas, Salvador; Eikenberry, Stephen S.; Sánchez, Beatriz; Chapa, Oscar; Espejo, Carlos; Flores-Meza, Rubén; Lara, Gerardo; Álvarez, Luis C.; Keiman, Carolina

    2008-07-01

    FRIDA (inFRared Imager and Dissector for the Adaptive optics system of the Gran Telescopio Canarias) has been designed as a diffraction limited instrument that will offer broad and narrow band imaging and integral field spectroscopy (IFS) capabilities with low, intermediate and high spectral resolutions to operate in the wavelength range 0.9 - 2.5 μm. The integral field unit is based on a monolithic image slicer based on the University of Florida FISICA. Both, the imaging mode and IFS observing modes will use the same Rockwell 2K×2K detector. FRIDA will be based at a Nasmyth focus of GTC, behind the GTCAO system. The FRIDA optical design, stray light analysis, tolerance analysis and manufacturing feasibility are described in this contribution.

  7. Geology and volcanology of La Palma and El Hierro, Western Canaries

    OpenAIRE

    Carracedo, Juan Carlos; Rodríguez Badiola, Eduardo; Guillou, Hervé; Nuez, Julio de la; Pérez Torrado, Francisco José

    2001-01-01

    Las Canarias occidentales, relativamente poco estudiadas hasta hace unos años desde el punto de vista geológico, han aportado sin embargo datos decisivos para la comprensión de muchos de los problemas geológicos más importantes del archipiélago, que posiblemente se hubieran dilucidado más prontamente si su estudio se hubiese comenzado, como en la mayoría de las cadenas de islas volcánicas oceánicas, por su extremo más reciente. Como resumen de sus principales rasgos geológicos evolutivos de a...

  8. El inventario del Patrimonio Arqueológico Subacuático dellitoral norte de Gran Canaria

    Directory of Open Access Journals (Sweden)

    Sergio Olmo

    2013-10-01

    Full Text Available  La realización del Inventario del Pa­trimonio Histórico para el Estudio Eco-carto­gráfico de la Zona Norte del Litoral de la isla de Gran Canaria, consistió en la localización e inventario de todos aquellos bienes de in­terés patrimonial que existieran en dicho área de estudio, mediante la puesta en marcha de una serie de labores de documentación y loca­lización espacial de los mismos. En lo que res­pecta al ámbito del estudio subacuático, éste comprendía la franja litoral dispuesta entre la Punta de La Aldea y la Punta de Gando y se extendía desde la línea mareal-costera hasta la cota de 50 metros de profundidad, certifi­cándose finalmente una notable cantidad de vestigios sumergidos.The object of the Inventory of Heritage for the Eco-cartographic Study of the Northern Coast of the island of Gran Canaria was to lo­cate and inventory all those elements deemed of patrimonial interest within the aforemen­tioned study area. With this aim, a series of procedures were employed to determine the spatial placement of elements and document findings. The scope of the underwater study comprised the coastline between La Punta de la Aldea and La Punta de Gando, taking in the area from the tide/coastline out to sea to a depth of 50metres. A considerable number of submerged remains were finally documented.

  9. Análisis de la nueva Ley de Radio y Televisión Pública de Canarias

    Directory of Open Access Journals (Sweden)

    R Zallo

    2015-04-01

    Full Text Available La nueva Ley de Radio y Televisión Públicas de la Comunidad Autónoma de Canarias (Ley 13/2014, de 26 de diciembre, y que sustituye a la anterior, aparece en un momento delicado para las radiotelevisiones autonómicas, hoy puestas en cuestión desde varios frentes. También se produce como aplicación del doble marco de la Ley General de Comunicación Audiovisual de 2010 y de su modificación por la ley 6/2012, de 1 de agosto y que flexibilizaba los modos de gestión de los canales públicos de televisión. El artículo analiza el aprovechamiento de las oportunidades que ofrecía la Ley General para democratizar el medio –en lo que se ha avanzado significativa pero insuficientemente–, para profundizar en la autogestión de la programación y los contenidos y para encarar los retos de Internet y concluye que la nueva Ley canaria es un avance para el servicio público respecto a los modelos del pasado pero se queda a medio camino del fortalecimiento del servicio público de RTV autonómica en este inicio de era digital. Además de la letra y espíritu del documento final del legislador se aborda su proceso de gestación y de la filosofía que lo impregna mediante el análisis de las enmiendas de los distintos grupos parlamentarios en el curso de su debate.

  10. Identification and characterization of uncoupling protein in heart and muscle mitochondria of canary birds.

    Science.gov (United States)

    Slocinska, Malgorzata B; Almsherqi, Zakaria Ali Moh; Sluse, Francis E; Navet, Rachel; Deng, Yuru

    2010-08-01

    An uncoupling protein (cUCP) was identified in heart and skeletal muscle mitochondria of canary birds. cUCP was immunodetected using polyclonal antibodies raised against murine UCP2. Its molecular mass was similar to those of mammalian UCPs (32 kDa). The activity of cUCP was stimulated by palmitic acid (PA) and inhibited by GTP mainly in state 3 respiration. Additions of PA augmented state 4 respiration and lowered the ADP/O ratio. Thus, the activity of cUCP diverted energy from oxidative phosphorylation in state 3 respiration. cUCP in heart and skeletal muscles of canary birds might have implications in thermogenesis as well as protection against free radical production.

  11. Toward a song code: evidence for a syllabic representation in the canary brain.

    Science.gov (United States)

    Ribeiro, S; Cecchi, G A; Magnasco, M O; Mello, C V

    1998-08-01

    We show that presentation of individual canary song syllables results in distinct expression patterns of the immediate-early gene ZENK in the caudomedial neostriatum (NCM) of adult canaries. Information on the spatial distribution and labeling of stained cells provides for a classification of ZENK patterns that (1) accords to the organization of stimuli into families, (2) preserves the stimuli intrafamily relationships, and (3) confers salience to natural over artificial stimuli, resulting in a nonclassical tonotopic map. Moreover, complex syllable maps cannot be reduced to any linear combinations of simple syllable maps. These properties arise from the collective response of NCM neurons to auditory stimuli, rather than from the behavior of single neurons. The syllabic representation described here may constitute an important step toward deciphering the rules of birdsong auditory representation.

  12. Modern pollen rain in Canary Island ecosystems and its implications for the interpretation of fossil records

    DEFF Research Database (Denmark)

    de Nascimento, Lea; Nogué, Sandra; Fernández-Lugo, Silvia

    2015-01-01

    Vegetation history in the Canary Islands, one of the most biodiverse regions within Europe, has recently and for the first time, been the subject of palaeoecological studies. The interpretation of fossil records may be limited by several uncertainties regarding how well the different vegetation...... indicator taxa of the local occurrence of their source plants by their high fidelity and low dispersibility index scores. Extra-regional types (taxa without potential source plants in the Canary Islands) were not detected in our traps. However, several important floristic elements are either over...... types are represented in the pollen rain. In this study we address this key knowledge gap within Canarian vegetation science, taking the island of Tenerife as a model. Based on quantitative and qualitative data we analysed pollen-vegetation relationships to test whether different vegetation types can...

  13. Confirmation of the presence of Ischnura senegalensis (Rambur, 1842 on the Canary Islands

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    Sánchez–Guillén R. A.

    2015-05-01

    Full Text Available The presence of one or two species of damselflies of the genus Ischnura in the Canary Islands has been a matter of debate in the recent years. The first published records listed I. senegalensis as the only zygopteran inhabiting the archipelago, but this proved to be wrong, and until recently, all specimens of Ischnura captured in the islands were unanimously regarded as belonging to I. saharensis. Recent photographic evidence, however, is compatible with the presence of I. senegalensis. In this study, we give morphological and genetic evidence of the presence of I. senegalensis in the Canary Islands, and we discuss the importance of voucher specimens to correctly identify very similar species.

  14. EVALUATING THE IMAGE OF TOURISM DESTINATIONS. THE CASE OF THE AUTONOMOUS COMMUNITY OF THE CANARY ISLANDS

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    Roxana - Andreea SARAGEA

    2011-12-01

    Full Text Available In the context of increased competition on the international tourism market, the assessment of destination image has become a research subject for both managers aiming to improve destination positioning and academic researchers. In order to obtain a competitive advantage, every tourist destination must identify, maintain and reinforce, through appropriate marketing policies, unique items that form and build over time "the destination' s image". Accordingly, the ultimate target of the tourist destinations' promoters should be to achieve a high level of coincidence between the promoted or projected image and the perceived image of the destination, held by potential and actual tourists. Therefore, the aim of this paper is to illustrate promotional techniques and methods used by the authorities of the Canary Islands over the years (projected image, and to identify, through a survey among the citizens of Braşov, the image that they have of the Canary Islands (perceived image.

  15. On the seasonal variability of the Canary Current and the Atlantic Meridional Overturning Circulation

    Science.gov (United States)

    Vélez-Belchí, Pedro; Pérez-Hernández, M. Dolores; Casanova-Masjoan, María.; Cana, Luis; Hernández-Guerra, Alonso

    2017-06-01

    The Atlantic Meridional Overturning Circulation (AMOC) is continually monitored along 26°N by the RAPID-MOCHA array. Measurements from this array show a 6.7 Sv seasonal cycle for the AMOC, with a 5.9 Sv contribution from the upper mid-ocean. Recent studies argue that the dynamics of the eastern Atlantic is the main driver for this seasonal cycle; specifically, Rossby waves excited south of the Canary Islands. Using inverse modeling, hydrographic, mooring, and altimetry data, we describe the seasonal cycle of the ocean mass transport around the Canary Islands and at the eastern boundary, under the influence of the African slope, where eastern component of the RAPID-MOCHA array is situated. We find a seasonal cycle of -4.1 ± 0.5 Sv for the oceanic region of the Canary Current, and +3.7 ± 0.4 Sv at the eastern boundary. This seasonal cycle along the eastern boundary is in agreement with the seasonal cycle of the AMOC that requires the lowest contribution to the transport in the upper mid-ocean to occur in fall. However, we demonstrate that the linear Rossby wave model used previously to explain the seasonal cycle of the AMOC is not robust, since it is extremely sensitive to the choice of the zonal range of the wind stress curl and produces the same results with a Rossby wave speed of zero. We demonstrate that the seasonal cycle of the eastern boundary is due to the recirculation of the Canary Current and to the seasonal cycle of the poleward flow that characterizes the eastern boundaries of the oceans.

  16. Status and distribution of breeding seabirds in the northern islets of Lanzarote, Canary Islands

    OpenAIRE

    Rodríguez, Beneharo; León, Leandro de; Martín, Aurelio; Alonso, Jesús; Nogales, Manuel

    2003-01-01

    We describe the results of a survey of breeding seabirds carried out between 2000 and 2002 in the northern islets of Lanzarote, Canary Islands, with particular emphasis on their status and distribution. For White-faced Stormpetrel Pelagodroma marina, Madeiran Storm-petrel Oceanodroma castro, Lesser Blackhacked Gull Larus [fuscus] graellsii and Yellow-legged Gull Larus cachinnans atlantis, somenew colonies were discovered on different islets. All species have maintained their numbers over the ...

  17. Modelo conceptual del sistema acuífero de Enchereda (La Gomera, Islas Canarias: contribuciones a otras islas volcánicas

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    Izquierdo, T.

    2011-06-01

    Full Text Available Hydrogeological conceptual models are difficult to develop in volcanic islands due to scarce hydrogeologic information in the inner parts of the islands and the complex structure of volcanic materials. This complexity is increased by 1 destruction processes (for example, flank collapse and 2 dike intrusion. Dikes can both channel groundwater flow parallel to their general trend or act as barriers impounding it. In this paper we evaluate the role of dikes and volcanoclastic deposits in Enchereda aquifer system (La Gomera, Canary Islands regional flow and particularly, in its higher area. In this aquifer system three hydrostratigraphic units can be identified: the Lower Old Basalts, with low permeability; the Volcanic Breccia, impermeable; and the Upper Old Basalts, permeable. The breccia seems to act as the impermeable limit of the aquifer and the reconstruction of its geometry shows a coherent surface dipping about 13º towards the ESE what determines the regional flow in the aquifer. After dike mapping using aerial photograph and orthophotograph as well as mapping in the field and inside Ipalán water tunnel, four dike swarms have been identified. NW-SE dikes are the most frequent ones, and show a maximum density of more than 10 dikes/100 m, similar to rift zones in volcanic islands. These dikes are parallel to the regional flow and channel water flow whereas the N-S and NE-SW swarms impound groundwater rising the water table level forming a stepped surface as they are perpendicular to the regional flow. Lastly, W-E dikes do not seem to have any significant influence on the aquifer. Our results show the need of a re-evaluation of the role of dikes in the regional flow in other volcanic island aquifers in which their influence have been minimized as overlapping of different dike swarms can condition regional flow in the aquifer.

    La elaboración de modelos conceptuales en acuíferos de islas volcánicas presenta una elevada dificultad

  18. First Report of Vermamoeba vermiformis in the Island of El Hierro, Canary Islands, Spain

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    María Reyes-Batlle

    2016-10-01

    Full Text Available Background: Free-living amoebae (FLA are group of protozoa distributed worldwide in many habitats mainly water and soil related sources. Some members of FLA are able to act as opportunistic pathogens and are environmental carriers of other pathogenic agents such as bacteria and viruses. Vermamoeba vermiformis is a highly abundant FLA species in water bodies and has recently gained environmental importance as it acts as a vehicle of many pathogenic bacteria such as Legionella pneumophila.Cases Report: In this study, water samples were collected from the island of El Hierro, Canary Islands, Spain during 2015. El Hierro island was designated by UNESCO as a biosphere reserve and it is currently the less populated of the Canary Islands. The water samples were culture on 2 % Non-Nutrient Agar (NNA plates covered with a thin layer of heat killed E. coli and checked daily for the presence of FLA. After a week, V. vermiformis amoebae were observed in the plates incubated at room temperature and 37 ºC. Molecular characterization was carried out by amplifying the 18S rDNA gene and DNA sequencing, confirming that the isolated strain belonged to Vermamoeba vermiformis species.Conclusion: To the best of our knowledge, this is the first report of Vermamoeba vermiformis isolation in the island of El Hierro and the second report of this species in the Canary Islands.

  19. A customizable 3-dimensional digital atlas of the canary brain in multiple modalities.

    Science.gov (United States)

    Vellema, Michiel; Verschueren, Jacob; Van Meir, Vincent; Van der Linden, Annemie

    2011-07-15

    Songbirds are well known for their ability to learn their vocalizations by imitating conspecific adults. This uncommon skill has led to many studies examining the behavioral and neurobiological processes involved in vocal learning. Canaries display a variable, seasonally dependent, vocal behavior throughout their lives. This trait makes this bird species particularly valuable to study the functional relationship between the continued plasticity in the singing behavior and alterations in the anatomy and physiology of the brain. In order to optimally interpret these types of studies, a detailed understanding of the brain anatomy is essential. Because traditional 2-dimensional brain atlases are limited in the information they can provide about the anatomy of the brain, here we present a 3-dimensional MRI-based atlas of the canary brain. Using multiple imaging protocols we were able to maximize the number of detectable brain regions, including most of the areas involved in song perception, learning, and production. The brain atlas can readily be used to determine the stereotactic location of delineated brain areas at any desirable head angle. Alternatively the brain data can be used to determine the ideal orientation of the brain for stereotactic injections, electrophysiological recordings, and brain sectioning. The 3-dimensional canary brain atlas presented here is freely available and is easily adaptable to support many types of neurobiological studies, including anatomical, electrophysiological, histological, explant, and tracer studies. Copyright © 2011 Elsevier Inc. All rights reserved.

  20. Quantitative integration of genetic factors in the learning and production of canary song.

    Science.gov (United States)

    Mundinger, Paul C; Lahti, David C

    2014-04-22

    Learned bird song is influenced by inherited predispositions. The canary is a model system for the interaction of genes and learning on behaviour, especially because some strains have undergone artificial selection for song. In this study, roller canaries (bred for low-pitched songs) and border canaries (whose song is higher pitched, similar to the wild-type) were interbred and backcrossed to produce 58 males that sorted into seven genetically distinct groups. All males were tutored with the same set of songs, which included both low- and high-pitched syllables. Individuals were consistent within genetic groups but differed between groups in the proportion of low- versus high-pitched syllables they learned and sang. Both sex-linked and autosomal factors affected song learning and song production, in an additive manner. Dominant Z-chromosome factors facilitated high-pitched syllable learning and production, whereas the sex-linked alleles associated with the switch to low-pitched syllables under artificial selection were largely recessive. With respect to autosomal effects, the most surprising result is that males in the same genetic group had almost identical repertoires. This result challenges two common preconceptions: that genetic changes at different loci lead to distinct phenotypic changes, and that genetic predispositions affect learning in simple and general ways. Rather, different combinations of genetic changes can be associated with the same phenotypic effect; and predispositions can be remarkably specific, such as a tendency to learn and sing one song element rather than another.

  1. Nannofossils in 2011 El Hierro eruptive products reinstate plume model for Canary Islands

    Science.gov (United States)

    Zaczek, Kirsten; Troll, Valentin R.; Cachao, Mario; Ferreira, Jorge; Deegan, Frances M.; Carracedo, Juan Carlos; Soler, Vicente; Meade, Fiona C.; Burchardt, Steffi

    2015-01-01

    The origin and life cycle of ocean islands have been debated since the early days of Geology. In the case of the Canary archipelago, its proximity to the Atlas orogen led to initial fracture-controlled models for island genesis, while later workers cited a Miocene-Quaternary east-west age-progression to support an underlying mantle-plume. The recent discovery of submarine Cretaceous volcanic rocks near the westernmost island of El Hierro now questions this systematic age-progression within the archipelago. If a mantle-plume is indeed responsible for the Canaries, the onshore volcanic age-progression should be complemented by progressively younger pre-island sedimentary strata towards the west, however, direct age constraints for the westernmost pre-island sediments are lacking. Here we report on new age data obtained from calcareous nannofossils in sedimentary xenoliths erupted during the 2011 El Hierro events, which date the sub-island sedimentary rocks to between late Cretaceous and Pliocene in age. This age-range includes substantially younger pre-volcanic sedimentary rocks than the Jurassic to Miocene strata known from the older eastern islands and now reinstate the mantle-plume hypothesis as the most plausible explanation for Canary volcanism. The recently discovered Cretaceous submarine volcanic rocks in the region are, in turn, part of an older, fracture-related tectonic episode.

  2. Diet of the extinct Lava mouse Malpaisomys insularis from the Canary Islands: insights from dental microwear

    Science.gov (United States)

    Firmat, Cyril; Gomes Rodrigues, Helder; Hutterer, Rainer; Rando, Juan Carlos; Alcover, Josep Antoni; Michaux, Jacques

    2011-01-01

    Malpaisomys insularis is a mouse-like rodent endemic to the eastern Canary Islands. It became extinct during the fourteenth century. It was a remarkable species living under hyperarid conditions. A dental microwear analysis was performed in order to determine its former diet. The elevated number of fine scratches found in Malpaisomys molars suggests that it consumed a significant part of Poaceae, grass consumption leaving the most distinctive features on dental wear facets. A graminivorous diet with a high amount of abrasive items is in agreement with the broad teeth of Malpaisomys, considered as adapted to grass consumption. However, in the absence of potential competitors over its native range, it is likely that Malpaisomys also foraged on dicots to meet higher nutrient and energetic requirements. The ecology of Malpaisomys is discussed from these results in the context of the desertic climatic conditions of the eastern Canary Islands and with a special concern on its small body size in contrast to other large-sized island murine species such as the giant rats of the central Canary Islands.

  3. Carbonate system distribution south of the Canary Islands in spring 2000

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    Iván R. Ucha

    2010-11-01

    Full Text Available The measurement of the surface molar fraction of CO2 (atmosphere and sea water and water column pHT, total alkalinity, AT, nutrients and oxygen were carried out in spring 2000 at the European Station for Time Series in the Ocean at the Canary Islands (ESTOC and in the area located south of the Canary Islands. The significant eddy field strongly affecting the pattern of the chemical and carbonate system variables is presented and discussed. A mixing model based on the thermohaline properties of the water masses was established. The model explained over 97% of the variability found in the distribution of the chemical variables. Intermediate waters to the south of the Canary Islands show a high contribution of Antarctic waters with about 5% of pure Antarctic Intermediate Water. Moreover, the surface structure affected the atmosphere-ocean carbon dioxide exchange, making the area act as a CO2 sink taking up 9.1 mmol m-2 week-1, corresponding to 0.03 Mt of CO2 which were taken up by the area in a week at the end of March 2000.

  4. New xenophytes from La Palma (Canary Islands, Spain, with emphasis on naturalized and (potentially invasive species

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    R. Otto

    2016-07-01

    Full Text Available Many years of field work in La Palma (western Canary Islands yielded a number of interesting new records of non-native vascular plants. Amaranthus blitoides, A. deflexus, Aptenia cordifolia, Argemone ochroleuca, Begonia schmidtiana, Capsella rubella, Cardamine hamiltonii, Centratherum punctatum, Cerastium fontanum subsp. vulgare, Chasmanthe floribunda (widely confused with C. aethiopica and Crocosmia xcrocosmiiflora in Macaronesia, Chenopodium probstii, Commelina latifolia var. latifolia, Dichondra micrantha, Dysphania anthelmintica, Epilobium ciliatum, Erigeron sumatrensis, Erodium neuradifolium, Eucalyptus globulus, Euphorbia hypericifolia, E. maculata, Gamochaeta antillana, Geranium pyrenaicum, Hedychium coronarium, Hypochaeris radicata, Kalanchoe daigremontiana, K. delagoensis, K. xhoughtonii, Kickxia commutata subsp. graeca, K. spuria subsp. integrifolia, Lactuca viminea subsp. ramosissima, Landoltia punctata, Malvastrum coromandelianum subsp. capitatospicatum, Oenothera jamesii, Orobanche nana, Oxalis latifolia, Papaver hybridum, P. setigerum, Pilea microphylla, Podranea ricasoliana, Polygonum arenastrum, Portulaca granulatostellulata, P. nicaraguensis, P. nitida, P. papillatostellulata, Rumex crispus subsp. crispus, R. pulcher subsp. pulcher, R. xpratensis, Sechium edule, Sida spinosa var. angustifolia, Silene nocturna, Solanum abutiloides, S. alatum, S. decipiens, Sonchus tenerrimus, Spergularia marina, Stellaria pallida, Tragopogon porrifolius subsp. australis, Tribulus terrestris and Trifolium repens subsp. repens are naturalized or (potentially invasive xenophytes, reported for the first time from either the Canary Islands or from La Palma. 37 additional, presumably ephemeral taxa are reported for the first time from the Canary Islands, whereas 56 ephemeral taxa are new for La Palma..

  5. Del "mar es de todos" al mar reservado: turistas, poblaciones de pescadores y reservas marinas en Canarias

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    Pascual Fernández, José J.

    2003-01-01

    Full Text Available In the last decades, the development patterns in the Canary Islands have changed the uses of maritime and littoral areas. Instead of traditional activities linked to fishing, now tourism and recreation are the core of the new uses. Nature, constructed or re-created, is now a key feature of many tourist destinies. In this context, marine protected areas attempt to preserve areas with special biological values from fisheries overexploitation, offering tourist and recreational uses compatible with conservation and following a general tendency all around the world. In the Canary Islands they constitute one of the most important measures of fisheries management and nature preservation. Nowadays there are three marine reserves in the Archipelago. The normative of marine protected areas limit professional fishing activities, and also drive forward tourism, especially scuba diving, involving relevant social impacts in the com-munities nearby. Also, those communities have had to confront many different impacts induced by tour-ism or aquaculture, changing economic strategies or the use of social spaces in land or at sea

  6. Comprehensive Molecular Characterization of Bacterial Communities in Feces of Pet Birds Using 16S Marker Sequencing.

    Science.gov (United States)

    Garcia-Mazcorro, Jose F; Castillo-Carranza, Stephany A; Guard, Blake; Gomez-Vazquez, Jose P; Dowd, Scot E; Brigthsmith, Donald J

    2017-01-01

    Birds and other animals live and evolve in close contact with millions of microorganisms (microbiota). While the avian microbiota has been well characterized in domestic poultry, the microbiota of other bird species has been less investigated. The aim of this study was to describe the fecal bacterial communities of pet birds. Pooled fecal samples from 22 flocks representing over 150 individual birds of three different species (Melopsittacus undulatus or budgerigars, Nymphicus hollandicus or cockatiels, and Serinus canaria or domestic canaries) were used for analysis using the 16S rRNA gene sequencing in the MiSeq platform (Illumina). Firmicutes was the most abundant phylum (median 88.4 %; range 12.9-98.4 %) followed by other low-abundant phyla such as Proteobacteria (median 2.3 %; 0.1-85.3 %) and Actinobacteria (median 1.7 %; 0-18.3 %). Lactobacillaceae (mostly Lactobacillus spp.) was the most abundant family (median 78.1 %; 1.4-97.5 %), especially in budgerigars and canaries, and it deserves attention because of the ascribed beneficial properties of lactic acid bacteria. Importantly, feces from birds contain intestinal, urinary, and reproductive-associated microbiota thus posing a serious problem to study one anatomical region at a time. Other groups of interest include the family Clostridiaceae that showed very low abundance (overall median bird species, meaning each species shed distinctive bacterial communities in feces. This descriptive analysis provides insight into the fecal microbiota of pet birds.

  7. Occurrence of Ornithonyssus sylviarum in pet birds from the district of Setúbal, Portugal.

    Science.gov (United States)

    Waap, Helga; Paulino, Diana; Cardoso, Rita

    2017-07-01

    Ornithonyssus sylviarum is a blood-feeding ectoparasite of birds and the most serious pest in poultry farms in North America. Although the mites are typically adapted to temperate climates, information on this mite in Europe is sparse, and Dermanyssus gallinae is considered to be the only mite impacting the poultry industry. The present study reports the occurrence of O. sylviarum in pet birds in Portugal. Mites were collected directly from birds and with traps placed in cages and nests at 20 different sampling places belonging to 6 municipalities in the district of Setúbal. In a total of 217 birds, O. sylviarum was identified in 47 out of 147 (32.0%) canaries (Serinus canaria), 14 out of 21 (14.3%) estrildid finches, 1 out of 24 (4.2%) budgerigars (Melopsittacus undulatus) and 1 out of 15 (6.7%) lovebirds (Agapornis spp.). Mites of the genus Dermanyssus were identified in 8 canaries (5.4%), 8 estrildid finches (38.1%) and 1 lovebird (6.7%). No mites were found in 6 cockatiels (Nymphicus hollandicus), 2 African grey parrots (Psittacus erithacus), 1 Bourke's parrot (Neophema bourkii) and 1 rose-ringed parakeet (Psittacula krameri). Considering the zoonotic potential and the risk of dissemination to poultry, the present findings underline the need for further monitoring of O. sylviarum in the wild and domestic avifauna in Portugal.

  8. Air pollution and mortality in the Canary Islands: a time-series analysis.

    Science.gov (United States)

    López-Villarrubia, Elena; Ballester, Ferran; Iñiguez, Carmen; Peral, Nieves

    2010-02-12

    The island factor of the cities of Las Palmas de Gran Canaria and Santa Cruz de Tenerife, along with their proximity to Africa and their meteorology, create a particular setting that influences the air quality of these cities and provides researchers an opportunity to analyze the acute effects of air-pollutants on daily mortality. From 2000 to 2004, the relationship between daily changes in PM10, PM2.5, SO2, NO2, CO, and ozone levels and daily total mortality and mortality due to respiratory and heart diseases were assessed using Generalized Additive Poisson models controlled for potential confounders. The lag effect (up to five days) as well as the concurrent and previous day averages and distributed lag models were all estimated. Single and two pollutant models were also constructed. Daily levels of PM10, PM2.5, NO2, and SO2 were found to be associated with an increase in respiratory mortality in Santa Cruz de Tenerife and with increased heart disease mortality in Las Palmas de Gran Canaria, thus indicating an association between daily ozone levels and mortality from heart diseases. The effects spread over five successive days. SO2 was the only air pollutant significantly related with total mortality (lag 0). There is a short-term association between current exposure levels to air pollution and mortality (total as well as that due specifically to heart and respiratory diseases) in both cities. Risk coefficients were higher for respiratory and cardiovascular mortality, showing a delayed effect over several days.

  9. Datos históricos de la presencia de fitónimos relacionados con el género Quercus L. en Canarias

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    Marcos Salas Pascual

    2013-11-01

    Full Text Available En el presente trabajo se discute la posible presencia histórica de algunas especies del género Quercus L. en Canarias. Se utilizan para ello referencias documentales y toponímicas, así como citas botánicas antiguas. De esta manera se plantea la posibilidad de que existiesen poblaciones distintas especies de este género en Fuerteventura y Tenerife.Presently work is discussed the possible historical presence of some species of the gender Quercus L. in Canarias. They are used for this toponimic and documental references, as well as botanical old appointments. This way thinks about the possibility that some species of this gender could grow in Fuerteventura and Tenerife.

  10. Contribution of bioanthropology to the reconstruction of prehistoric productive processes. The external auditory exostoses in the prehispanic population of Gran Canaria

    OpenAIRE

    Velasco Vázquez, Javier; Martín Rodríguez, Ernesto; González Reimers, Emilio; Arnay de la Rosa, Matilde; Betancor Rodríguez, Antonio

    2001-01-01

    The aim of this paper is an approach to the role of bioanthropological studies in the reconstruction of the productive processes of past societies. This objective is obtained starting from the survey and valuation of the prevalence of bone exostoses in the auditory canal among the prehistoric inhabitants of Gran Canaria. The auditory exostose is a bone wound well documented through clinical and experimental studies, closely related to the exposure of the auditory canal to cold water. The esti...

  11. Las cerámicas aborígenes de Gran Canaria (Islas Canarias a través del yacimiento de La Cerera: materias primas, tecnología y función

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    del Pino Curbelo, Miguel

    2016-06-01

    Full Text Available This paper focuses on the study of the pre-Hispanic ceramics from the site of La Cerera (Gran Canaria (7th century AD – 13th century AD. An integrated approach combining various levels of analysis has been carried out, employing morphological, technical and functional analysis of the pots, as well as their instrumental characterization: X-ray fluorescence (XRF, X-ray diffraction (XRD, optical petrography and scanning electron microscopy (SEM. As result, different operative chains have been detected, linked to function and chronology. Other differences with respect to the characteristics of the archaeological materials through time were also identified. Those transformations seem to coincide with others already observed for various elements of the aboriginal material culture at the site, as well as at other parts of the island. The effects of the intensification of pottery production on the homogeneity of the fabrics are also discussed.Se analizan los materiales cerámicos prehispánicos del yacimiento de La Cerera en Gran Canaria (siglos VII-XIII D.C.. Se integra la clasificación morfotécnica y funcional, y la caracterización instrumental mediante fluorescencia de rayos X (FRX, difracción de rayos X (DRX, petrografía óptica (PO y microscopía electrónica de barrido (MEB relacionando cada nivel de estudio aplicado. Como resultado se detectaron diferentes cadenas operativas, conectadas con la función de los vasos y su cronología. Además se observaron importantes cambios diacrónicos en las características del material. Estos parecen coincidir con otros identificados en el registro del propio yacimiento y en otros sitios de la isla. También se discuten los posibles efectos de la intensificación de la producción sobre la homogeneidad de las fábricas cerámicas.

  12. UNIFORMIDAD FISCAL VERSUS TERRITORIOS PRIVILEGIADOS EN LA ESPAÑA DEL SIGLO XVIII: LOS CASOS DE NAVARRA Y CANARIAS

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    Sergio Solbes Ferri

    2014-12-01

    Full Text Available El trabajo se organiza desde una doble reflexión. Por un lado, el éxito o el fracaso en la aplicación de los proyectos de reforma fiscal diseñados para su imposición en el conjunto de la Monarquía española en la primera mitad del siglo XVIII. Por otro lado, el éxito o el fracaso en la defensa de los privilegios fiscales de Navarra y de Canarias, territorios en los que Felipe V no pudo, ni quiso, imponer el derecho de conquista tras la guerra de Sucesión. Analizamos estas especificidades con la intención de conocer aquellos aspectos que perduran en el tiempo y aquellos que desaparecen. Finalmente, tratamos de reflexionar sobre si el resultado final es la consecuencia necesaria de un proyecto de reforma preconcebido o de una simple adaptación a las circunstancias propias del devenir histórico. Apostamos por la primera solución, así que tratamos en integrar los cambios implementados con el pensamiento y los programas de reforma diseñados por Alberoni y Patiño.AbstractThis study is organized from a double perspective. Firstly, the success or failure in the implementation of projects designed to reform taxation in the whole Spanish monarchy during the first half of the eighteenth century. On the other hand, the success or failure in defending the fiscal privileges of Navarra and Canarias, territories in which Philip V could not impose the right of conquest after the War of Succession. We analyse these specificities with the intention of meeting those aspects that remain and those that disappear. Lastly, we try to reflect if the final status is the result of a preconceived reform project or a simple adaptation to the circumstances of the historical development. We focus on the first solution, so we try to relate the implemented changes with the Alberoni and Patiño reform programs.

  13. Crude oil as a stranding cause among loggerhead sea turtles (Caretta caretta) in the Canary Islands, Spain (1998-2011).

    Science.gov (United States)

    Camacho, María; Calabuig, Pascual; Luzardo, Octavio P; Boada, Luis D; Zumbado, Manuel; Orós, Jorge

    2013-07-01

    We report the number of strandings caused by crude oil among loggerhead turtles (Caretta caretta) in the Canary Islands between 1998 and 2011 and analyze the impact of the designation of the Canary Islands as a Particularly Sensitive Sea Area (PSSA) in 2005. Among 1,679 stranded loggerhead turtles, 52 turtles stranded due to crude oil (3.1%). The survival rate of the turtles stranded by crude oil was 88%. All turtles that died because of crude oil stranding had signs of ingestion of crude oil and lesions, included esophageal impaction, necrotizing gastroenteritis, necrotizing hepatitis, and tubulonephrosis. The number of strandings caused by crude oil after 2005 was significantly lower than it was before 2006. We show that the designation of the Canary Islands as a PSSA in 2005 by the International Maritime Organization was associated with a reduction of sea turtle strandings caused by crude oil.

  14. Bias in density estimations using strip transects in dry open-country environments in the Canary Islands

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    Carrascal, L. M.

    2008-12-01

    Full Text Available We studied bias in density estimations derived from strip transects in dry open-country in the Canary Islands. We also present some critical remarks on García-del-Rey’s (2005 paper regarding strip transects and the validity of comparisons based on population densities of birds in scrublands on Tenerife island using two different methods: territory mapping and strip transect sampling. Although strip transects with census belts of 25 m do not account for detectability, this method only slightly undervalues true density estimates, and allowed to detect more than 85% of birds present in poorly vegetated environments in the Canary Islands. Previously published works on distribution and abundance of terrestrial birds in the Canary Islands using the strip transect sampling with belts of 25 m on both sides of the observer, thus provide reliable information that only slightly underestimates true densities.

  15. Nuevos datos sobre algunas especies de Hemeróbidos de la península Ibérica e islas Canarias, incluyendo una nueva especie invasora de origen neotropical en Portugal (Insecta, Neuroptera, Hemerobiidae

    Directory of Open Access Journals (Sweden)

    Monserrat, V. J.

    2013-12-01

    Full Text Available New data on the distribution, biology and phenology of 25 brown lacewings species (Insecta, Neuroptera: Hemerobiidae of Iberian and Canaries fauna are given. The species Hemerobius bolivari Banks, 1910, widely distributed in the Neotropical Region, is recorded for the first time in Europe as a new invasive species, from specimens collected on Thaumastocoris peregrinus Carpintero & Dellapé, 2006 (Hemiptera: Thaumastocoridae colonies on Eucalyptus in Lisbon (Portugal. This brown lacewing species, along with Sympherobius gayi Navás, 1910, also known from South America, is the second invasive species of neotropical origin, belonging to this family, that is recorded in the Iberian Peninsula, both from Portugal. We also mention several species that have been seldom recorded in the Iberian Peninsula, and among them Wesmaelius ravus (Withycombe, 1923 is recorded for the second time in the Iberian Peninsula, now from Sierra Nevada (Granada. From samplings made in southern Spain (Malaga, Granada Micromus angulatus (Stephens, 1836 shows activity as imagoes during winter time (the entire year in the Iberian Peninsula, including this area, and these data seem also to confirm its link to grass vegetation.Se anotan nuevos datos sobre la distribución, biología y fenología de 25 especies de hemeróbidos (Insecta, Neuroptera: Hemerobiidae de las Faunas Ibérica y Canaria. La especie Hemerobius bolivari Banks, 1910, ampliamente distribuida por la Región Neotropical, se cita por primera vez de Europa como una nueva especie invasora, a partir de ejemplares recolectados en colonias de Thaumastocoris peregrinus Carpintero y Dellapé, 2006 (Hemiptera: Thaumastocoridae: sobre Eucalyptus en Lisboa (Portugal. Esta especie, junto a Sympherobius gayi Navás, 1910, también originaria de Sudamérica, es la segunda especie invasora de origen neotropical que de esta familia se cita en la Península Ibérica, en este caso también de Portugal. Se mencionan varias especies

  16. Meteorological Patterns and Fog Water in the Canary Islands and Morocco

    Science.gov (United States)

    Marzol, M. V.; Sanchez Megía, J. L.; Yanes, A.; Bargach, J.; Derhem, A.

    2010-07-01

    The Stratocumulus cloud formation is very common in the Canary Islands (Spain) and on the Atlantic coast of Morocco. This cloud formation behaves as if it was fog when it comes into contact with the relief and its liquid content can be captured by artificial systems. The origin of this cloud formation is connected with the Azores anti-cyclone and with the anomalous structure of the low layers of the atmosphere caused by a subsidence thermal inversion. The aim of this article is to define a pattern of the most favourable meteorological and atmospheric conditions for this cloud formation to appear. In order to do this, a database has been compiled with the information about the days on which water has been collected in Morocco since June, 2006. This was when the collaboration with the Si Hmad Derhem Foundation (Casablanca) began. As well as meteorological data and data on water quantities, weather maps, thermodynamic soundings and satellite images are also analysed. The following two sites were studied: Anaga, on the island of Tenerife, Canary Islands, 864 m a.s.l. and 4 km from the coast, and Boutmezguida, Morocco, 1,225 m a.s.l. and 30 km from the coast. The research was conducted in three stages. The first stage consisted of looking for the most appropriate sites to obtain the greatest efficiency in fog water collection; the Standard Fog Collector (SFC, Schemenauer and Cereceda, 1994) was used for this purpose. The second stage consisted of studying the most favourable meteorological conditions for water collection where the Quarter Fog Collector (QFC, Marzol, 2002) connected to an automatic weather station providing information on temperature, humidity, precipitation, wind speed and direction and the amount of water collected on the netting every ten minutes was used to do this. The aim of the third stage, which was by nature an applied stage, was to construct large-sized fog collectors (Large Fog Collector, LFC) so that the water collected could be put to

  17. Using the canary genome to decipher the evolution of hormone-sensitive gene regulation in seasonal singing birds.

    Science.gov (United States)

    Frankl-Vilches, Carolina; Kuhl, Heiner; Werber, Martin; Klages, Sven; Kerick, Martin; Bakker, Antje; de Oliveira, Edivaldo Hc; Reusch, Christina; Capuano, Floriana; Vowinckel, Jakob; Leitner, Stefan; Ralser, Markus; Timmermann, Bernd; Gahr, Manfred

    2015-01-29

    While the song of all songbirds is controlled by the same neural circuit, the hormone dependence of singing behavior varies greatly between species. For this reason, songbirds are ideal organisms to study ultimate and proximate mechanisms of hormone-dependent behavior and neuronal plasticity. We present the high quality assembly and annotation of a female 1.2-Gbp canary genome. Whole genome alignments between the canary and 13 genomes throughout the bird taxa show a much-conserved synteny, whereas at the single-base resolution there are considerable species differences. These differences impact small sequence motifs like transcription factor binding sites such as estrogen response elements and androgen response elements. To relate these species-specific response elements to the hormone-sensitivity of the canary singing behavior, we identify seasonal testosterone-sensitive transcriptomes of major song-related brain regions, HVC and RA, and find the seasonal gene networks related to neuronal differentiation only in the HVC. Testosterone-sensitive up-regulated gene networks of HVC of singing males concerned neuronal differentiation. Among the testosterone-regulated genes of canary HVC, 20% lack estrogen response elements and 4 to 8% lack androgen response elements in orthologous promoters in the zebra finch. The canary genome sequence and complementary expression analysis reveal intra-regional evolutionary changes in a multi-regional neural circuit controlling seasonal singing behavior and identify gene evolution related to the hormone-sensitivity of this seasonal singing behavior. Such genes that are testosterone- and estrogen-sensitive specifically in the canary and that are involved in rewiring of neurons might be crucial for seasonal re-differentiation of HVC underlying seasonal song patterning.

  18. Doublecortin as a marker of adult neuroplasticity in the canary song control nucleus HVC.

    Science.gov (United States)

    Balthazart, Jacques; Boseret, Géraldine; Konkle, Anne T M; Hurley, Laura L; Ball, Gregory F

    2008-02-01

    It is established that in songbirds the size of several brain song control nuclei varies seasonally, based on changes in cell size, dendritic branching and, in nucleus HVC, the incorporation of newborn neurons. In the developing and adult mammalian brain, the protein doublecortin (DCX) is expressed in postmitotic neurons and, as a part of the microtubule machinery, required for neuronal migration. We recently showed that in adult canaries, DCX-immunoreactive (ir) cells are present throughout the telencephalon, but the link between DCX and the active neurogenesis observed in songbirds remained uncertain. We demonstrate here that DCX labels recently born cells in the canary telencephalon and that, in parallel with changes in HVC volume, the number of DCX-ir cells is increased specifically in the HVC of testosterone-treated males compared with castrates, and in castrated testosterone-treated males paired with a female as compared with males paired with another male. The numbers of elongated DCX-ir cells (presumptive migrating neurons) and round multipolar DCX-ir cells (differentiating neurons) were also affected by the sex of the subjects and their photoperiodic condition (photosensitive vs photostimulated vs photorefractory). Thus, in canaries the endocrine state, as well as the social or photoperiodic condition independently of variation in steroid hormone action, affects the number of cells expressing a protein involved in neuronal migration specifically in brain areas that incorporate new neurons in the telencephalon. The DCX gene may be one of the targets by which testosterone and social stimuli induce seasonal changes in the volume of song nuclei.

  19. Representation of the bird's own song in the canary HVC: contribution of broadly tuned neurons.

    Science.gov (United States)

    Lehongre, K; Del Negro, C

    2011-01-26

    In songbirds, neurons in the song nucleus HVC exhibit a striking example of selective auditory response, firing more to playback of the bird's own song (BOS) than to conspecific songs. This song selectivity has been found in various songbird species, both those that sing a single individual-specific song as well as those, such as the canary, in which both song structure and individual-identity encoding in song is more complex. In the present study, we investigated how the BOS is represented in the HVC of anesthetized long-day canaries by using temporal and spectral variants of the BOS stimulus. We addressed the question of how selective HVC neurons were by quantifying the number of song elements, called phrases, that evoked auditory responses. Phrases that were individual-specific or that were frequently delivered in an individual's songs did not drive HVC neurons to a greater degree than others. Reordering phrases or altering their acoustic structure caused a decrease in the auditory responsiveness of HVC neurons. This sensitivity to the spectral and temporal features of the BOS involved neurons that failed to respond to BOS variants or were driven by a reduced number of phrases, as well as neurons whose auditory responsiveness extended beyond the features of the individual's song, responding to phrases that were not sung by the bird itself. Therefore, the neural strategy by which BOS structure is represented in the canary HVC may require something other than a strict representation of the repertoire of song components. We suggest that the individual's song could be coded, at least in part, by an ensemble of broadly tuned neurons. © 2011 IBRO. Published by Elsevier Ltd. All rights reserved.

  20. Improving GNSS time series for volcano monitoring: application to Canary Islands (Spain)

    Science.gov (United States)

    García-Cañada, Laura; Sevilla, Miguel J.; Pereda de Pablo, Jorge; Domínguez Cerdeña, Itahiza

    2017-04-01

    The number of permanent GNSS stations has increased significantly in recent years for different geodetic applications such as volcano monitoring, which require a high precision. Recently we have started to have coordinates time series long enough so that we can apply different analysis and filters that allow us to improve the GNSS coordinates results. Following this idea we have processed data from GNSS permanent stations used by the Spanish Instituto Geográfico Nacional (IGN) for volcano monitoring in Canary Islands to obtained time series by double difference processing method with Bernese v5.0 for the period 2007-2014. We have identified the characteristics of these time series and obtained models to estimate velocities with greater accuracy and more realistic uncertainties. In order to improve the results we have used two kinds of filters to improve the time series. The first, a spatial filter, has been computed using the series of residuals of all stations in the Canary Islands without an anomalous behaviour after removing a linear trend. This allows us to apply this filter to all sets of coordinates of the permanent stations reducing their dispersion. The second filter takes account of the temporal correlation in the coordinate time series for each station individually. A research about the evolution of the velocity depending on the series length has been carried out and it has demonstrated the need for using time series of at least four years. Therefore, in those stations with more than four years of data, we calculated the velocity and the characteristic parameters in order to have time series of residuals. This methodology has been applied to the GNSS data network in El Hierro (Canary Islands) during the 2011-2012 eruption and the subsequent magmatic intrusions (2012-2014). The results show that in the new series it is easier to detect anomalous behaviours in the coordinates, so they are most useful to detect crustal deformations in volcano monitoring.

  1. Neuronal production, migration, and differentiation in a vocal control nucleus of the adult female canary brain.

    Science.gov (United States)

    Goldman, S A; Nottebohm, F

    1983-01-01

    The vocal control nucleus designated HVc (hyperstriatum ventrale, pars caudalis) of adult female canaries expands in response to systemic testosterone administration, which also induces the females to sing in a male-like manner. We became interested in the possibility of neurogenesis as a potential basis for this phenomenon. Intact adult female canaries were injected with [3H]thymidine over a 2-day period. Some birds were given testosterone implants at various times before thymidine. The birds were sacrificed 5 wk after hormone implantation, and their brains were processed for autoradiography. In parallel control experiments, some birds were given implants of cholesterol instead of testosterone. All birds showed considerable numbers of labeled neurons, glia, endothelia, and ventricular zone cells in and around HVc. Ultrastructural analysis confirmed the identity of these labeled neurons. Cholesterol- and testosterone-treated birds had similar neuronal labeling indices, which ranged from 1.8% to 4.0% in HVc. Thus, neurogenesis occurred in these adults independently of exogenous hormone treatment. Conversely, both glial and endothelial proliferation rates were markedly stimulated by exogenous testosterone treatment. We determined the origin of the thymidine-incorporating neurons by sacrificing two thymidine-treated females soon after their thymidine injections, precluding any significant migration of newly labeled cells. Analysis of these brains revealed no cells of neuronal morphology present in HVc but a very heavily labeled ventricular zone overlying HVc. We conclude that neuronal precursors exist in the HVc ventricular zone that incorporate tritiated thymidine during the S phase preceding their mitosis; after division these cells migrate into, and to some extent beyond, HVc. This ventricular zone neurogenesis seems to be a normally occurring phenomenon in intact adult female canaries. Images PMID:6572982

  2. The One-humped Camel in the Canary Islands: History and Present Status

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    Wilson, RT.

    2015-01-01

    Full Text Available The one-humped camel (Camelus dromedarius L. is not indigenous to the Canary Islands but based on historical references was introduced at the very beginning of the fifteenth century. The camel thrived in the subtropical dry environment. A long period of isolation from other animals of the same species meant that the animals were virtually disease free. This made the Islands an ideal base for exporting camels to new areas such that camels from the Canaries went to Peru in the sixteenth century, to Brazil in the eighteenth century, Venezuela and Bolivia in the early part of the nineteenth century and Australia in 1840. Camels went to several Caribbean islands in the middle of the nineteenth century. More recently (late twentieth and early twenty-first centuries some animals were exported from the islands to mainland Europe, notably France, Spain and the Netherlands, and to South America. Camels have been used in military operations, as transport and draught animals in support of agriculture and have found a role in the tourist industry. In early 2013 there were some 1,300 camels distributed over four of the larger islands of the archipelago in herds varying in size from a single animal to herds of as many as 150 head: a large group of about 400 heads kept in a Safari Park on the island of Fuerteventura is considered as the national conservation herd. The "Canary" camel has recently been shown to be genetically distinct from most other populations and it has been proposed that it should be designated as a distinct breed.

  3. Women and irregular mobility flows in the European Ultraperiphery: the example of the Canary Islands

    OpenAIRE

    Domínguez Mujica, Josefina; Guerra Talavera, Raquel

    2015-01-01

    During the last fifty years, the Canary Islands have experienced a radical change in terms of foreign mobility flows. On the strength of the tourist boom that took place during the 1960s and 70s, the Islands changed their traditional emigratory role into an immigratory one. Over the last few years, these migration flows have reached their peak with over 61,000 new foreign residents registered. This development has led to this Ultraperipheral Region having the second highest rate of resident f...

  4. Biogeographic ranges do not support niche theory in radiating Canary Island plant clades

    DEFF Research Database (Denmark)

    Steinbauer, Manuel; Field, Richard; Fernández-Palacios, José María

    2016-01-01

    species in radiating clades in oceanic archipelagos, where closely related species exist in both sympatry and allopatry and the species’ entire ranges are known. We took advantage of this natural experimental system to test whether the climatic niche relationships predicted by the two hypotheses are found....... Location: Canary Islands. Methods: For the plant clades Aeonium, Argyranthemum, Descurainia, Echium, Lotus and Sonchus, separately, we tested relationships between phylogenetic distance and climatic niche differentiation (in temperature, precipitation and their combination), using a high-resolution dataset...

  5. A customizable 3-dimensional digital atlas of the canary brain in multiple modalities

    DEFF Research Database (Denmark)

    Vellema, Michiel; Verschueren, Jacob; Van Meir, Vincent

    2011-01-01

    throughout their lives. This trait makes this bird species particularly valuable to study the functional relationship between the continued plasticity in the singing behavior and alterations in the anatomy and physiology of the brain. In order to optimally interpret these types of studies, a detailed...... understanding of the brain anatomy is essential. Because traditional 2-dimensional brain atlases are limited in the information they can provide about the anatomy of the brain, here we present a 3-dimensional MRI-based atlas of the canary brain. Using multiple imaging protocols we were able to maximize......, histological, explant, and tracer studies....

  6. Study of the the Tenerife island (Canaries, Spain) unrest via geodetic observations

    Science.gov (United States)

    Fernandez, J.; Camacho, A. G.; Prieto, J. F.; Rodríguez-Velasco, G.; Tiampo, K. F.; Puglisi, G.; Guglielmino, F.; Gonzalez, P. J.; Mallorqui, J. J.; Tunini, L.; Willert, V.; Charco, M.; Navarrete, D.; Duque, S.; González-Matesanz, J.; Valdés, M.; Carrasco, D.

    2006-12-01

    After a quite period larger than 90 years from the last eruption, a significantly unusual seismic activity started in April 2004 on the volcanic island of Tenerife, Canary Islands, Spain. It marked the first observationally documented unrest in the island with more than 3000 seismic events in the following twenty two months. The geophysical signature of the reactivation includes felt earthquakes, gas emissions, surface displacements and gravity changes. Here we present the observed anomalies detected using geodetic observation (GPS and InSAR) of this unrest up to 2006, and their interpretation in order to shed light on the causative sub-surface processes for the unrest, its time and spatial evolution.

  7. Deformation Analysis Employing the Coherent Pixel Technique and Envisat and ERS Images in Canary Islands

    Science.gov (United States)

    Arjona, A.; Monells, D.; Fernandez, J.; Duque, S.; Mallorqui, J.

    2010-03-01

    Geodetic measurements in volcanic areas are crucial as they serve as input information to the deformation analysis techniques in order to achieve pre-eruption ground displacement predictions. In particular, Satellite Radar Interferometry (InSAR) has been proven to be a useful and powerful tool in this kind of areas. We present some results obtained by applying the Coherent Pixel Technique, an Advanced Differential SAR Interferometry algorithm, which reveal surface deformation episodes in Canary Islands (La Palma and Tenerife Island). The study is carried out by employing DInSAR interferograms concerning the 1992-2008 period corresponding to both ascending and descending images acquired by the ENVISAT and ERS sensors.

  8. El papel de los convenios urbanísticos en la planificación de nuevos espacios urbanos: el caso de Gáldar-Guía (Gran Canaria

    Directory of Open Access Journals (Sweden)

    Arranz Lozano, María Mercedes

    2013-06-01

    Full Text Available In the following article we will lay out the urban development guidelines which two municipalities of Gran Canaria have undergone, Gáldar and Guía which, together with Agaete, make up the Northwest sector of the island. The urban expansion took place mainly on the coastal strip of both municipalities, below 300m of altitude above sea level due to the strong demographic increase that took place there at the beginning of the 20th century as a result of agricultural development, particularly in banana and tomato farming; and stemming from the fact that, from the sixties onwards, and more precisely the eighties, property developers realized that the transformation of rural land into urban could be very profitable. This fact caused an urban expansion in the aforementioned strip by means of the legal norm known as the Urban Development Agreement. With this agreement an abstraction was made of the Subsidiary Planning Regulations and furthermore a great connivance between local powers and property developers took place. All with the aim of warranting the private interests of the latter, over the general welfare of the community, in these municipalities.En el artículo que se presenta a continuación damos a conocer las pautas del desarrollo urbano que han experimentado dos municipios de Gran Canaria, Gáldar y Guía, que, con Agaete conforman el sector noroeste de esa isla. La expansión urbana tuvo lugar fundamentalmente en la franja costera de ambos municipios, localizada por debajo de los 300 m de altitud sobre el nivel del mar, porque fue allí donde a comienzos del siglo XX se produjo un fuerte crecimiento demográfico, como resultado del desarrollo agrícola, en particular de los cultivos del plátano y de tomate; y porque a partir de los años sesenta, y más concretamente de los ochenta, los promotores inmobiliarios vieron que la transformación del suelo rural en urbano podía ser muy rentable. Este hecho originó una expansión urbana, en la

  9. Voto dual y abstención diferencial en Canarias: análisis del comportamiento electoral canario

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    Luis Melián Rodríguez

    2013-01-01

    Full Text Available El análisis del comportamiento electoral es una de las ramas más importante y prolífera dentro de la Ciencia Política. El objetivo del presente trabajo es realizar por primera vez un análisis descriptivo del comportamiento dentro de los procesos electorales, al Parlamento de Canarias desde 1999 hasta las elecciones de 2007; haciendo un especial hincapié en dos conceptos poco trabajados por la disciplina: el voto dual y la abstención diferencial. Fenómenos que han sido estudiados principalmente en Cataluña, y que se caracterizan por “cambiar su voto entre las elecciones legislativas y las autonómicas” (Montero y Font 1991:7. Tras este análisis se puede esbozar un cierto perfil de comportamiento electoral canario caracterizado por una participación inferior a la media española, una mayor dispersión del voto y un número efectivo de partidos casi el doble que el nacional. Observándose una alta volatilidad electoral total entre las dos últimas elecciones. No se aprecia una abstención diferencial especialmente significativa, con una mayor participación a nivel de elecciones nacionales; y cierto comportamiento de voto dual en el que los partidos nacionales ven claramente aumentado su caudal electoral en las elecciones generales y viceversa con los nacionalistas.

  10. El «Edificio Central» en las Palmas de Gran Canaria – España

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    Ruiz Duerto, A.

    1972-11-01

    Full Text Available A description is given of the program, characteristics, and building solutions for this unique building, situated in downtown Las Palmas. The building complex is composed of two underground levels for parking, a ground-floor and mezzanine for commercial purposes, and open plaza with swimming pool, dressing rooms, cafeteria, restaurant, dance spot, playground, and a block of 15 floors containing 137 apartments of varying size arranged so as to minimize sun overexposure and maximize privacy. The structure is of reinforced concrete and lightweight slabs, and enjoys quality fixtures which assure excellent functioning.Se describe el programa, características y solución constructiva de este edificio singular, situado en el centro cívico de Las Palmas de Gran Canaria. Se compone de: — dos plantas de sótano para estacionamiento de vehículos; planta baja comercial; — entreplanta comercial; — planta libre ajardinada con piscina, vestuarios-aseos, cafetería, restaurante, club de baile, juego de niños, guardería, etc.; — un bloque de 15 plantas con 137 apartamentos, de superficie variada, y dispuesto de forma que evite perjuicios de soleamiento y vistas a los edificios circundantes. Estructura de hormigón armado y losas aligeradas, con toda suerte de instalaciones que aseguren su perfecto funcionamiento.

  11. El abastecimiento y la saca de bastimentos de Gran Canaria : el pleito de D. Pdro Sarmiento de Ayala y Rojas

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    Germán Santana Pérez

    1996-01-01

    Full Text Available El abastecimiento de cereal era uno de los problemas más acuciantes a que se enfrentaron cada uno de los cabildos de las Islas Canarias durante todo el Antiguo Régimen. El hecho de la insularidad conllevaba a la vez, respecto a otras regiones continentales, una serie de ventajas y desventajas a la hora de asegurar el alimento. Durante este periodo, debido a la propia organización económica del Archipiélago, y a sus limitaciones, las continuas y periódicas malas cosechas afectaban cada pocos años a las producciones alimenticias de cada isla, no sólo de pan sino de otros mantenimientos comestibles, incluyendo el ganado, ya que al no haber siquiera pasto para que pudieran comer, en época de sequía, por plaga de langosta, etc., éste acababa pereciendo de hambre, lo que traía como efecto que la población sufriera estas consecuencias (si bien unas clases sociales más que otras.

  12. Metodología para un proceso apreciativo, dinámico y colaborativo: III Plan de Salud de Canarias

    Directory of Open Access Journals (Sweden)

    José Joaquín O'Shanahan Juan

    2016-11-01

    Full Text Available La necesidad de nuevos enfoques de planificación estratégica con la incorporación de la visión de profesionales y ciudadanos ha orientado un nuevo modelo para el III Plan de Salud de Canarias (IIIPSC. Se propone un proceso participativo con soporte de metodología cualitativa en dos etapas: 1 fase local: estudio cuantitativo-cualitativo a través de una acción formativa y de investigación-acción-participación, y 2 fase insular: conferencias de salud, con debate sobre resultados en sesiones presenciales en cada área de salud (isla y propuestas de acción. El proceso define una priorización de problemas y un plan de acción específico para cada isla mediante operaciones consideradas viables, agrupadas por temas y ponderadas según el potencial impacto sobre los problemas priorizados. Este proceso de interacción puede contribuir a orientar los cambios de modelo de planificación y la toma de decisiones en política sanitaria, y se encuentra recogido en el Proyecto del IIIPSC para su tramitación parlamentaria.

  13. Propuesta de rutas de geoturismo urbano en Icod de Los Vinos (Tenerife, Islas Canarias, España

    Directory of Open Access Journals (Sweden)

    Javier Dóniz-Páez

    2016-01-01

    Full Text Available En los destinos maduros de sol y playa los nuevos productos y experiencias turísticas son una realidad palpable. El geoturismo urbano se presenta como un producto de turismo muy novedoso que consiste en explotar turísticamente el relieve presente dentro de las ciudades. Este artículo propone diferentes rutas de geoturismo urbano en el municipio de Icod de Los Vinos (Tenerife, Canarias, España a partir del inventario, caracterización y valoración del patrimonio geomorfológico presente en los diferentes geomorfositios y en el patrimonio cultural tangible inmueble. Se han seleccionado doce recursos naturales y culturales vinculados con la geodiversidad de Icod de los Vinos. En función de la variedad de recursos inventariados y de las posibilidades que ofrece esta nueva modalidad de ocio turístico, los itinerarios propuestos responden a tres rasgos principales: el tiempo geológico, la temática geológica y geomorfológica, y la espacial.

  14. Usos del suelo y capacidad de carga territorial: el caso de la Caldera del Rey (Tenerife, Islas Canarias

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    José Iván Bolaños González

    2002-01-01

    Full Text Available Adeje, municipio suroccidental de la isla de Tenerife, ha experimentado un importante crecimiento turístico en las últimas décadas, concentrándose las urbanizaciones destinadas a dicha actividad en el ámbito costero colmatándolo progresivamente. Como consecuencia, la superficie ocupada por uno de los principales cultivos de exportación de Canarias, el plátano, se ha reducido notablemente, pues este uso del suelo compite con la expansión turística en detrimento del platanal. La Caldera del Rey se ha convertido en uno de los «refugios» de este cultivo, aunque se deberá conocer la capacidad de carga territorial de este ámbito con el fin de averiguar el grado de compatibilidad de la actividad agraria con la declaración de Monumento Natural. Así, se propone en este artículo un procedimiento para su cálculo, basado en la aptitud, la vulnerabilidad y la calidad ambiental, aunque será el análisis de la dinámica de usos del suelo el punto de partida del mismo.

  15. Subtidal soft-bottom macroinvertebrate communities of the Canary Islands. An ecological approach

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    Oscar Monterroso

    2012-03-01

    Full Text Available The Canarian archipelago is characterized by a mosaic of soft-bottoms such as Cymodocea nodosa meadows, Caulerpa spp. meadows, mäerl bottoms, sabellid fields and bare sandy seabeds, including various macroinfaunal communities. Vegetated habitats (e.g. Cymodocea and Caulerpa maintain more diverse communities than the non-vegetated seabeds. The results indicated that Caulerpa meadows and, to a lesser extent, Cymodocea nodosa and sabellid fields are the richest and most diverse ecosystems in the study area. Moreover, biodiversity differences among islands could be detected with maximum values on the eastern islands (Lanzarote and Gran Canaria and lowest values on the western ones (La Palma.O arquipélago das Canárias é caracterizado por um mosaico de fundos inconsolidados contendo bancos de Cymodocea nodosa, Caulerpa spp., fundos calcários, bancos de sabelídeos e sedimento não biogênico, que abrigam diferentes comunidades da macrofauna. Ambientes vegetados (Cymodocea e Caulerpa possuem comunidades mais diversificadas quando comparados aos ambientes de fundos não vegetados. Os resultados do presente estudo indicaram que os bancos de Caulerpa, primeiramente, e em seguida os bancos de Cymodocea nodosa e de sabelídeos, formam os sistemas mais ricos e diversificados da área. Além disso, puderam também ser detectadas diferenças de biodiversidade entre as ilhas do arquipélago, sendo os valores mais altos localizados nas ilhas ao leste (Lanzarote e Gran Canaria e os menores nas ilhas à oeste (La Palma.

  16. Air pollution and mortality in the Canary Islands: a time-series analysis

    Directory of Open Access Journals (Sweden)

    Ballester Ferran

    2010-02-01

    Full Text Available Abstract Background The island factor of the cities of Las Palmas de Gran Canaria and Santa Cruz de Tenerife, along with their proximity to Africa and their meteorology, create a particular setting that influences the air quality of these cities and provides researchers an opportunity to analyze the acute effects of air-pollutants on daily mortality. Methods From 2000 to 2004, the relationship between daily changes in PM10, PM2.5, SO2, NO2, CO, and ozone levels and daily total mortality and mortality due to respiratory and heart diseases were assessed using Generalized Additive Poisson models controlled for potential confounders. The lag effect (up to five days as well as the concurrent and previous day averages and distributed lag models were all estimated. Single and two pollutant models were also constructed. Results Daily levels of PM10, PM2.5, NO2, and SO2 were found to be associated with an increase in respiratory mortality in Santa Cruz de Tenerife and with increased heart disease mortality in Las Palmas de Gran Canaria, thus indicating an association between daily ozone levels and mortality from heart diseases. The effects spread over five successive days. SO2 was the only air pollutant significantly related with total mortality (lag 0. Conclusions There is a short-term association between current exposure levels to air pollution and mortality (total as well as that due specifically to heart and respiratory diseases in both cities. Risk coefficients were higher for respiratory and cardiovascular mortality, showing a delayed effect over several days.

  17. Male song quality modulates c-Fos expression in the auditory forebrain of the female canary.

    Science.gov (United States)

    Monbureau, Marie; Barker, Jennifer M; Leboucher, Gérard; Balthazart, Jacques

    2015-08-01

    In canaries, specific phrases of male song (sexy songs, SS) that are difficult to produce are especially attractive for females. Females exposed to SS produce more copulation displays and deposit more testosterone into their eggs than females exposed to non-sexy songs (NS). Increased expression of the immediate early genes c-Fos or zenk (a.k.a. egr-1) has been observed in the auditory forebrain of female songbirds hearing attractive songs. C-Fos immunoreactive (Fos-ir) cell numbers were quantified here in the brain of female canaries that had been collected 30min after they had been exposed for 60min to the playback of SS or NS or control white noise. Fos-ir cell numbers increased in the caudomedial mesopallium (CMM) and caudomedial nidopallium (NCM) of SS birds as compared to controls. Song playback (pooled SS and NS) also tended to increase average Fos-ir cell numbers in the mediobasal hypothalamus (MBH) but this effect did not reach full statistical significance. At the individual level, Fos expression in CMM was correlated with its expression in NCM and in MBH but also with the frequency of calls that females produced in response to the playbacks. These data thus indicate that male songs of different qualities induce a differential metabolic activation of NCM and CMM. The correlation between activation of auditory regions and of the MBH might reflect the link between auditory stimulation and changes in behavior and reproductive physiology. Copyright © 2015 Elsevier Inc. All rights reserved.

  18. Negative effects of yolk testosterone and ticks on growth in canaries.

    Science.gov (United States)

    Vergauwen, Jonas; Heylen, Dieter; Eens, Marcel; Müller, Wendt

    2011-11-01

    Maternal yolk hormones in bird eggs are thought to adjust the offspring to the post-hatching environment. This implies that the effects of maternal yolk hormones should vary with the post-hatching environment, but to date such context-dependency has largely been ignored. We experimentally increased yolk testosterone concentrations in canary eggs and simultaneously manipulated the post-hatching context via an experimental tick-infestation of the chicks. This allows us to evaluate the context-dependency of hormone-mediated maternal effects, as it has previously been shown that ectoparasites alter the maternal yolk androgen deposition. The experimental tick infestation reduced growth in chicks from sham-treated eggs, indicating harmful effects of this ectoparasite in canaries. Chicks from testosterone-treated eggs were not affected in their development by ticks, suggesting lower ectoparasite vulnerability. But this may also be due to the fact that experimentally elevated yolk testosterone levels impaired growth even under parasite-free conditions. This contrasts previous studies, but these studies often manipulated first laid eggs, while we used eggs of subsequent laying positions. Later laid eggs are presumably of lower quality and contain higher yolk testosterone concentrations. Thus, the effects of elevated yolk testosterone on growth may be dose-dependent or vary with the egg quality, suggesting prenatal context-dependency. © 2011 Wiley Periodicals, Inc.

  19. Long-term volcanic hazard assessment on El Hierro (Canary Islands)

    Science.gov (United States)

    Becerril, L.; Bartolini, S.; Sobradelo, R.; Martí, J.; Morales, J. M.; Galindo, I.

    2014-07-01

    Long-term hazard assessment, one of the bastions of risk-mitigation programs, is required for land-use planning and for developing emergency plans. To ensure quality and representative results, long-term volcanic hazard assessment requires several sequential steps to be completed, which include the compilation of geological and volcanological information, the characterisation of past eruptions, spatial and temporal probabilistic studies, and the simulation of different eruptive scenarios. Despite being a densely populated active volcanic region that receives millions of visitors per year, no systematic hazard assessment has ever been conducted on the Canary Islands. In this paper we focus our attention on El Hierro, the youngest of the Canary Islands and the most recently affected by an eruption. We analyse the past eruptive activity to determine the spatial and temporal probability, and likely style of a future eruption on the island, i.e. the where, when and how. By studying the past eruptive behaviour of the island and assuming that future eruptive patterns will be similar, we aim to identify the most likely volcanic scenarios and corresponding hazards, which include lava flows, pyroclastic fallout and pyroclastic density currents (PDCs). Finally, we estimate their probability of occurrence. The end result, through the combination of the most probable scenarios (lava flows, pyroclastic density currents and ashfall), is the first qualitative integrated volcanic hazard map of the island.

  20. Strontium-90 in Canada goose eggshells and reed canary grass from the Columbia River, Washington.

    Science.gov (United States)

    Rickard, W H; Price, K R

    1990-01-01

    Strontium-90 ((90)SR) released to the ground near the N Reactor at the U.S. Department of Energy's Hanford Site enters the Columbia River through shoreline seeps. The (90)Sr is then potentially available for uptake by plants and animals. The life history and foraging behavior of nesting Canada geese is such that female geese could ingest (90)Sr while foraging on shoreline plants. Radichemical analyses showed that goose eggshells taken from an island, downstream from the N Reactor, contained more (90)Sr than did eggshells collected from other downstream islands. Reed canary grass samples taken from shoreline areas immediately downstream from the N Reactor contained higher concentrations of (90)Sr than samples from other downstream areas. All goose eggshells did not contain enhanced levels of (90)Sr, and all reed canary grass samples did not contain enhanced levels of (90)Sr, but a relationship exists between the releases of (90)Sr to the Columbia River and the enhanced levels of (90)Sr in some of the environmental samples analyzed.

  1. Pathology and causes of death of stranded cetaceans in the Canary Islands (1999-2005).

    Science.gov (United States)

    Arbelo, Manuel; Los Monteros, Antonio Espinosa de; Herráez, Pedro; Andrada, Marisa; Sierra, Eva; Rodríguez, Francisco; Jepson, Paul D; Fernández, Antonio

    2013-03-26

    Between 1999 and 2005, 233 stranded cetaceans (comprising 19 species) were reported in the waters of the Canary Islands. Of these, 138/233 (59.2%) were subjected to a complete or partial standardized necropsy, including 4 Balaenopteridae, 9 Physeteridae, 8 Kogiidae, 27 Ziphiidae and 90 Delphinidae. Of these, 46/138 (33.3%) cetaceans were diagnosed with anthropogenic pathological categories (i.e. the cause of death was anthropogenic). These included fishing interaction (bycatch) (19 individuals), 'atypical' mass stranding events linked to naval exercises (13), ship collisions (8) and other anthropogenic-related pathology (6). 'Natural' (i.e. non-anthropogenic) causes of death accounted for another 82/138 (59.4%) cases, including infectious and non-infectious diseases (63), neonatal pathology (8), intra- and interspecific interactions (6) and mass strandings (5). The cause(s) of death could not be determined in 10/138 (7.3%) necropsied animals. The most common causes of death were ship collisions in 6/9 (66.6%) Physeteridae, 'atypical' mass stranding linked to naval exercises in 13/27 (48.1%) Ziphiidae, and 'natural' infectious and non-infectious diseases in 55/90 (61.1%) Delphinidae. Interaction with fishing activities was established as cause of death in 15/90 (16.7%) Delphinidae. These data show that a range of anthropogenic and natural single and mass mortality events occur in multiple cetacean species stranded in the Canary Islands.

  2. Unusual Vermamoeba Vermiformis Strain Isolated from Snow in Mount Teide, Tenerife, Canary Islands, Spain

    Directory of Open Access Journals (Sweden)

    Maria Reyes-Batlle

    2015-10-01

    Full Text Available Background: Free-living amoebae (FLA are protozoa that are widely distributed in the environment mainly in water and soil related habitats. Thermophilic amoebae are among the most common FLA in water bodies, being Vermamoeba vermiformis one of the most common species reported worldwide from these sources. Interestingly, V. vermiformis has often been reported to survive at high temperatures and osmotic pressure worldwide.Materials and Methods: In this study, snow samples were collected from Mount Teide, Tenerife, Canary Islands during the winter season of 2014. The samples were culture on non nutrient agar plates and checked daily for the presence of FLA. After a week, V. vermiformis amoebae were observed in the plates incubated at room temperature and 37ºC.Results: Molecular characterization was carried out by amplifying the 18S rDNA gene and DNA sequencing, confirmed that the isolated strain belonged to Vermamoeba vermiformis species.Conclusion: To the best of our knowledge, this is the first report of Vermamoeba vermiformis isolation from such an inusual habitat (low temperatures and high altitude and the first report of these species in the Canary islands.

  3. Hospitalizations realted to herpes zoster infection in the Canary Islands, Spain (2005-2014).

    Science.gov (United States)

    García-Rojas, Amós; Gil-Prieto, Ruth; Núñez-Gallo, Domingo Ángel; Matute-Cruz, Petra; Gil-de-Miguel, Angel

    2017-08-24

    Herpes zoster is an important problem of public health especially among the elderly in Spain. A population-based retrospective epidemiological study to estimate the burden of herpes zoster requiring hospitalization in the Canary Islands, Spain was conducted by using data from the national surveillance system for hospital data, Conjunto Mínimo Básico de Datos. Records of all patients admitted to hospital with a diagnosis of herpes zoster in any position and cases of primary diagnosis (ICD-9-MC codes 053.0-053.9) during a 10-year period (2005-2014), were selected. A total of 1088 hospitalizations with a primary or secondary diagnosis of herpes zoster were identified during the study period. Annually there were 6.99 hospitalizations by herpes zoster per 100,000 population. It increases with age reaching a maximum in persons ≥85 years of age (43.98 admissions per 100,000). Average length of hospitalization was 16 days and 73 patients died, with a case-fatality rate of 4.03%. In 22% of the cases hospitalized, herpes zoster was the primary diagnosis. The hospitalization burden of herpes zoster in adults in the Canary Islands was still important during the last decade and justify the implementation of preventive measures, like vaccination in the elderly or other high risk groups to reduce the most severe cases of the disease.

  4. ECHEYDE. Teide volcano and protohistoric Guanche settlements of Tenerife, Canary islands

    Science.gov (United States)

    Ilaria Pannaccione Apa, Maria; Barrera Rodriguez, Sergio; Fabrizia Buongiorno, Maria

    2010-05-01

    The volcanic origin and activity of the Canary island territory represent one of inhabitants growing factors of the along the recent geology, besides, the rich land fertility due to lava flows, was one of the reasons of their colonization by guanche culture. In general their social structure, based on chiefdom, as the Menceyatos, poor on technologies and strictly related to natural resources, could be considered as a real winning survival strategy face to an active volcanic island. The locational analysis carried out in this brief study shows that the western menceyatos were almost populated despite the possible high risks resulting from eruptions, landslides and lava flows. On the contrary, it seems clear that there was a total adaptation to the landscape, given by the high proportion of occupations in cave. Resilient mechanisms were probably transmitted during local assemblies, as a common strategy to face the events, despite the Spanish chronicles didn't inform of any particular guanche cultural tradition associated with Teide volcano and related hazards. The volcanic eruptions with low explosive features during last 10.000 years did not caused major cultural changes, whereas large ash falls produced a real damages with the consequence of human displacements along the limited island territories. [Canary Islands, Guanche, Volcanic Activity, Resilience

  5. A Subtropical Cyclone in the Canary Islands: the October 2014 event

    Science.gov (United States)

    Quitian, Lara; Martin, Maria Luisa; Jesús González-Alemán, Juan; Santos-Muñoz, Daniel; Valero Rodríguez, Francisco

    2016-04-01

    Depending on the thermal structure and dynamics, there are different types of cyclones in the troposphere. Subtropical cyclones (STC) are low pressure systems that share tropical and extratropical characteristics, having hybrid thermal structures. In October 2014, a cyclonic system landfall the Canary Islands, causing widespread damages. The system began to develop in October 18 and its effects lasted until October 21. Here, the diagnosis and identification of such cyclone as STC is carried out, examining its dynamical and thermal evolution. Diverse fields have been obtained from three different numerical models, and several diagnostic tools and cyclone phase space diagrams have been used. The cyclone evolved from a typical extratropical cyclone, detached from the atmospheric circulation which was highly meridional and became a stationary cut-off low. The meridional intrusion of the trough as well as a low-level baroclinic zone favored the formation of a STC northwestern of the Canary Islands. Several cyclone phase space diagrams are used to classify the cyclone as a STC, highlighting a deep cold core in its early stages that develops into a shallow warm core. High potential vorticity areas associated with the cyclone promoted strong winds and precipitation over the Islands. Throughout the event, an increased conditional instability is observed in the different soundings, leading to strong vertical wind shear. Moreover, relatively warm sea surface temperature is obtained, establishing the conditions to favor the organization of long-lived convective structures.

  6. Comparison of The Canary System and DIAGNOdent for the in vitro detection of caries under opaque dental sealants.

    Science.gov (United States)

    Silvertown, Josh D; Wong, Bonny P Y; Abrams, Stephen H; Sivagurunathan, Koneswaran S; Mathews, Sapna M; Amaechi, Bennett T

    2017-11-01

    The aim of the present study was to investigate the ability of operators using The Canary System and DIAGNOdent to detect natural pit and fissure caries under four commonly-used opaque dental sealants. Mixed sound and carious pits/fissures (N = 105) selected from 40 human teeth were randomly assigned (10 teeth/group) to one of four opaque sealant groups (Delton, Embrace WetBond, Helioseal F, UltraSeal XT Plus). Selected pits/fissures sites on occlusal surfaces were scanned with The Canary System and DIAGNOdent, sealed, re-scanned, and subjected to polarized light microscopy to confirm whether the scanned regions were sound or carious. Sensitivities and specificities for each detection method before and after sealant placement were calculated. The Canary System and DIAGNOdent were able to distinguish between sound and carious tissue beneath opaque sealants with an accuracy of 76% and 59%, respectively. The Canary System can serve as a clinical tool to aid dental professionals to detect and monitor the status of caries lesions and tooth structure underneath sealant. The increased likelihood of false-positive diagnoses with DIAGNOdent due to intrinsic auto-fluorescence of sealant filler and opacifying agents might limit its usefulness as an aid to detect caries underneath opaque sealants. © 2016 John Wiley & Sons Australia, Ltd.

  7. Window Dressing or Transformation? Intercultural Education Influenced by Globalization and Neoliberalism in a Secondary School in the Canary Islands, Spain

    Science.gov (United States)

    Perez, Lidia Cabrera; Montero-Sieburth, Martha; Gonzalez, Elisa Trujillo

    2012-01-01

    This article profiles intercultural education efforts at schools on the Canary Islands. After a brief profile of this autonomous community of Spain, descriptions of national efforts to promote intercultural education as they are enacted in one particular school setting are provided. Successes and limitations of these efforts are detailed.…

  8. Chasing the European Dream: Unaccompanied African Youths' Educational Experience in a Canary Islands' Reception Centre and Beyond

    Science.gov (United States)

    Auger-Voyer, Valérie; Montero-Sieburth, Martha; Perez, Lidia Cabrera

    2014-01-01

    In the last two decades, Spain's Canary Islands have received thousands of undocumented migrants arriving by boat from the coasts of North and West Africa. The sharp increase of unaccompanied minors has presented a particular challenge, as these minors fall under the State's protection system and are entitled to an education and other rights, once…

  9. Possible mechanisms of host resistance to Haemonchus contortus infection in sheep breeds native to the Canary Islands

    Science.gov (United States)

    The blood feeder parasite Haemonchus contortus appears to be the most economically important helminth species for small ruminant production in many regions of the world. The two sheep breeds native to the Canary Islands display distinctly different resistant phenotypes under both natural and experim...

  10. Planck intermediate results XXXVI. Optical identification and redshifts of Planck SZ sources with telescopes at the Canary Islands observatories

    DEFF Research Database (Denmark)

    Ade, P. A. R.; Aghanim, N.; Arnaud, M.

    2016-01-01

    We present the results of approximately three years of observations of Planck Sunyaev-Zeldovich (SZ) sources with telescopes at the Canary Islands observatories as part of the general optical follow-up programme undertaken by the Planck Collaboration. In total, 78 SZ sources are discussed. Deep-i...

  11. Eusarsiella bedoyai (Myodocopida, Sarsiellidae), a new ostracode species from a marine lava cave in the Canary Islands

    NARCIS (Netherlands)

    Baltanás, Angel

    1992-01-01

    A new species of the ostracode genus Eusarsiella (Myodocopida, Sarsiellidae) is described from a marine lava tube in Lanzarote (Canary Islands) and compared with other species known to occur in the same geographical area. Eusarsiella bedoyai n. sp. is the second species in that genus described from

  12. Antioxidant and Antihypertensive Potential of Protein Fractions from Flour and Milk Substitutes from Canary Seeds (Phalaris canariensis L.).

    Science.gov (United States)

    Valverde, María Elena; Orona-Tamayo, Domancar; Nieto-Rendón, Blanca; Paredes-López, Octavio

    2017-03-01

    Canary seed (Phalaris canariensis) is used to feed birds but it has been recently considered a promising cereal with nutraceutical potential for humans. The aim of this work was to analyze the protein fractions from canary seed flour and from milk substitutes (prepared by soaking the seeds in water 12 and 24 h), and to evaluate antioxidant and antihypertensive capacity of peptides obtained after in vitro digestion. Prolamins were the major protein fraction, followed by glutelins. After digestion, albumins and prolamins fractions from milks presented higher levels of peptides than flour, globulins showed more peptides in flour and glutelins were found in similar concentrations in all samples; 24 h milk prolamins had the highest concentration of peptides. Purification by high performance liquid chromatography (HPLC), sequencing of peptides, in vitro antioxidant ABTS (2,2'-azino-bis, 3-ethylbenzothiazoline-6-sulphonic acid) and DPPH (2,2-diphenyl-1-picrylhydrazyl) assays, and antihypertensive capacity (angiotensin converting enzyme (ACE) assay), indicated that peptides from canary seed prolamins were the most efficient compounds with antioxidant and antihypertensive activity. Canary seeds may be considered an accessible and cheap source to prepare milk substitutes with high contents of bioactive peptides with remarkable functional properties to promote better human health and healthy ageing.

  13. Chemical composition and methane yield of reed canary grass as influenced by harvesting time and harvest frequency

    DEFF Research Database (Denmark)

    Kandel, Tanka Prasad; Sutaryo, Sutaryo; Møller, Henrik Bjarne

    2013-01-01

    This study examined the influence of harvest time on biomass yield, dry matter partitioning, biochemical composition and biological methane potential of reed canary grass harvested twice a month in one-cut (OC) management. The regrowth of biomass harvested in summer was also harvested in autumn a...

  14. LA INNOVACIÓN EDUCATIVA EN ESPAÑA DESDE LA PERSPECTIVA DE GRUPOS DE DISCUSIÓN: EL CASO DE LA COMUNIDAD AUTÓNOMA DE CANARIAS

    Directory of Open Access Journals (Sweden)

    Juan Santiago Arencibia Arencibia

    2010-01-01

    Full Text Available El artículo se enmarca en una investigación llevada a cabo en todas las comunidades de España sobre las características, impacto y problemática de la innovación educativa iniciada desde los propios centros escolares. En el estudio realizado en la Comunidad Canaria, se utilizaron grupos de discusión con representantes de distintos estamentos relacionados con proyectos de innovación escolar. Los participantes reconocen los esfuerzos de la Administración Canaria por simplificar burocráticamente las convocatorias de proyectos de innovación lo que, a su vez, aumenta las posibilidades de que más centros participen. A pesar de ello, el análisis de nuestros participantes deja claro que la selección de líneas prioritarias en las convocatorias no está suficientemente contrastada con la práctica, los tiempos y recursos asignados no son realistas, y la ausencia de unos procedimientos claros de seguimiento y evaluación convierte a la mayor parte de los proyectos en ceremonias poco sostenibles. Así, la Administración puede decir que desembolsa presupuesto en innovación pero no consigue implicar a la mayor parte de los centros y tampoco tiene respuestas acerca de qué resultados se están obteniendo. Existe pues una burocracia de la innovación pero tal vez todavía no haya todavía una política de innovación educativa en Canarias.

  15. The impact of the climate on the epidemiology of Dirofilaria immitis in the pet population of the Canary Islands.

    Science.gov (United States)

    Montoya-Alonso, J A; Carretón, E; Morchón, R; Silveira-Viera, L; Falcón, Y; Simón, F

    2016-01-30

    Cardiopulmonary dirofilariosis (heartworm) is a zoonotic vector borne disease caused by Dirofilaria immitis which affects domestic dogs and cats. Two of the seven Canary Islands are historically hyperendemic areas of dirofilariosis, although no epidemiological study has ever been carried out which includes the other islands. The aim of the study was to complete the epidemiological status of cardiopulmonary dirofilariosis in the canine and feline population throughout all the Canary Islands. 1643 client-owned dogs and 707 client-owned cats were tested for D. immitis antigens (dogs), and anti-D. immitis and anti-Wolbachia antibodies (cats). The prevalence of canine dirofilariosis in the Canary Islands was 15.7%, and the seroprevalence of feline dirofilariosis was 18.1%. A remarkable disparity was found when evaluating the results by island separately, which ranged from from 0% in Lanzarote and El Hierro, low prevalences and seroprevalences in Fuerteventura (1.8% and 2.5% in dogs and cats, respectively), to higher prevalences on the other 4 islands; ranging between 15.7% (dogs) and 14.3% (cats) in La Palma 22.5% (dogs) and 24.1% (cats) in Tenerife. In addition, prevalences and seroprevalences were very variable within each island, these differences being associated to local climate conditions. The distribution and prevalence of dirofilariosis in the Canary Islands is heterogeneous and related to climate, demographic factors and management of pets in the studied areas. Dirofilariosis remains hyperendemic in 4 of the 7 Islands. Since D. immitis is a zoonosis, veterinary and health authorities should be aware of the current prevalence and seroprevalence of animal dirofilariosis. The results show the need for awareness raising campaigns to promote the implementation of prophylactic measures in pets, in order to achieve a decrease in the prevalence of animal dirofilariosis in the Canary Islands. Copyright © 2015 Elsevier B.V. All rights reserved.

  16. Metodología integral para la determinación de una gran superficie comercial. Aplicación empírica en Gran Canaria

    OpenAIRE

    Guitiérrez Acuña, José Luis

    2014-01-01

    Programa de Gestión en la Nueva Economía [ES] El objetivo de esta tesis consiste en desarrollar una metodología para determinar la localización óptima de un centro comercial a partir de la función de productividad, así como validarla empíricamente en la zona norte de la isla de Gran Canaria. Con ello, se podrá demostrar que la atracción comercial del posible nuevo centro comercial obtendría el umbral de rentabilidad, debido al potencial de demanda existente así como al elevado nivel de dem...

  17. Actitudes ante la diversidad sexual de la población adolescente de Coslada (Madrid) y San Bartolomé de Tirajana (Gran Canaria)

    OpenAIRE

    Martín Martín, Nuria; Molinuevo Puras, Belén; Pichardo Galán, José Ignacio; Rodríguez Medina, Pedro Octavio; Romero López, Marta

    2007-01-01

    La investigación, hecha sobre una muestra de más de 4.500 adolescentes, se ha realizado paralelamente en dos municipios tan diferentes como son Coslada (Madrid) y San Bartolomé de Tirajana (Gran Canaria). En este último se encuentra el famoso destino de turismo gay Maspalomas. La investigación partió de un encargo de la Concejalía de Mujer e Igualdad del Ayuntamiento de Coslada al Área de Educación de la FELGTB (COGAM es fundador y socio de la FELGTB). Posteriormente se incorporó el Ayuntamie...

  18. El radón en suelos, rocas, materiales de construcción y aguas subterráneas de las Islas Canarias Orientales

    OpenAIRE

    Alonso Hernández, Héctor

    2016-01-01

    Programa de doctorado: Física Fundamental y Aplicada. La fecha de publicación es la fecha de lectura [ES]El objetivo fundamental de este trabajo de Tesis Doctoral es realizar un estudio completo del radón ambiental (en suelos, rocas y aguas subterráneas) en las Islas Canarias Orientales. También se realiza un estudio de las propiedades de exhalación de radón de los materiales de construcción más comunes en estas islas.

  19. COMPETITIVIDAD Y CALIDAD EN LOS DESTINOS TURÍSTICOS DE SOL Y PLAYA. EL CASO DE LAS ISLAS CANARIAS

    Directory of Open Access Journals (Sweden)

    J. Rosa Marrero Rodríguez

    2008-01-01

    Full Text Available El objeto del artículo es conocer y comparar el nivel de competitividad que presentan las cuatro islas turísticas canarias más importantes, a través de la combinación de diferentes variables de aproximación al mismo. Todo ello se plantea en el contexto más general de discusión de los mecanismos de reconversión y reposicionamiento en los destinos tradicionales de sol y playa a través de la implementación de elementos de calidad en el negocio turístico. Para acercarnos a la medición de la competitividad se ha usado una metodología doble: a través de las estadísticas del gasto turístico, los niveles de ocupación y la evolución del número de plazas y de turistas. Y también a través de un pequeño estudio de casos en Internet, donde se han analizado los precios para dos paquetes turísticos característicos. Los resultados coinciden en indicar que, a pesar de la estrategia de calidad adoptada por Lanzarote, esto no parece traducirse en una mayor rentabilidad económica para el sector. En definitiva, a pesar de la proclamada importancia de la calidad como factor clave de competitividad, no está claro que el mercado esté dispuesto a recompensar a aquellos destinos que apuestan con precios mayores por la calidad.

  20. A long-term retrospective study on rehabilitation of seabirds in Gran Canaria Island, Spain (2003-2013.

    Directory of Open Access Journals (Sweden)

    Natalia Montesdeoca

    Full Text Available The aims of this study were to analyze the causes of morbidity and mortality in a large population of seabirds admitted to the Tafira Wildlife Rehabilitation Center (TWRC in Gran Canaria Island, Spain, from 2003 to 2013, and to analyze the outcomes of the rehabilitation process.We included 1,956 seabirds (133 dead on admission and 1,823 admitted alive in this study. Causes of morbidity were classified into nine categories: light pollution (fallout, fishing gear interaction, crude oil, poisoning/intoxication, other traumas, metabolic/nutritional disorder, orphaned young birds, other causes, and unknown/undetermined. The crude and stratified (by causes of admission rates of the three final disposition categories (euthanasia Er, unassisted mortality Mr, and release Rr, the time until death, and the length of stay were also studied for the seabirds admitted alive.Yellow-legged Gull (Larus michahellis was the species most frequently admitted (46.52%, followed by Cory's Shearwater (Calonectris diomedea borealis (20.09%. The most frequent causes of morbidity were light pollution (fallout (25.81%, poisoning/intoxication (24.69%, and other traumas (18.14%. The final disposition rates were: Er = 15.35%, Mr = 16.29%, and Rr = 68.34%. The highest Er was observed in the 'other traumas' category (58.08%. Seabirds admitted due to metabolic/nutritional disorder had the highest Mr (50%. The highest Rr was observed in the light pollution (fallout category (99.20%.This survey provides useful information for the conservation of several seabird species. We suggest that at least the stratified analysis by causes of admission of the three final disposition rates, and the parameters time until death and length of stay at the center should be included in the outcome research of the rehabilitation of seabirds. The high release rate for seabirds (68.34% achieved at the TWRC emphasizes the importance of wildlife rehabilitation centers for the conservation of seabirds.

  1. A long-term retrospective study on rehabilitation of seabirds in Gran Canaria Island, Spain (2003-2013).

    Science.gov (United States)

    Montesdeoca, Natalia; Calabuig, Pascual; Corbera, Juan A; Orós, Jorge

    2017-01-01

    The aims of this study were to analyze the causes of morbidity and mortality in a large population of seabirds admitted to the Tafira Wildlife Rehabilitation Center (TWRC) in Gran Canaria Island, Spain, from 2003 to 2013, and to analyze the outcomes of the rehabilitation process. We included 1,956 seabirds (133 dead on admission and 1,823 admitted alive) in this study. Causes of morbidity were classified into nine categories: light pollution (fallout), fishing gear interaction, crude oil, poisoning/intoxication, other traumas, metabolic/nutritional disorder, orphaned young birds, other causes, and unknown/undetermined. The crude and stratified (by causes of admission) rates of the three final disposition categories (euthanasia Er, unassisted mortality Mr, and release Rr), the time until death, and the length of stay were also studied for the seabirds admitted alive. Yellow-legged Gull (Larus michahellis) was the species most frequently admitted (46.52%), followed by Cory's Shearwater (Calonectris diomedea borealis) (20.09%). The most frequent causes of morbidity were light pollution (fallout) (25.81%), poisoning/intoxication (24.69%), and other traumas (18.14%). The final disposition rates were: Er = 15.35%, Mr = 16.29%, and Rr = 68.34%. The highest Er was observed in the 'other traumas' category (58.08%). Seabirds admitted due to metabolic/nutritional disorder had the highest Mr (50%). The highest Rr was observed in the light pollution (fallout) category (99.20%). This survey provides useful information for the conservation of several seabird species. We suggest that at least the stratified analysis by causes of admission of the three final disposition rates, and the parameters time until death and length of stay at the center should be included in the outcome research of the rehabilitation of seabirds. The high release rate for seabirds (68.34%) achieved at the TWRC emphasizes the importance of wildlife rehabilitation centers for the conservation of seabirds.

  2. The Instituto de Astrofísica de Canarias: 30 years of Research and Communication in Astronomy.

    Science.gov (United States)

    Del Puerto, Carmen; Rodriguez, Nayra; Rosenberg, Alfred; Beckman, John Etienne

    2015-08-01

    1985 was a year of inauguration for the Instituto de Astrofísica de Canarias (IAC). In that year its two observatories, the Observatorio del Roque de los Muchachos, on the island of La Palma, (where its 10.4m optical-NIR telescope vies with the world´s major instruments), and the Observatorio del Teide, on the island of Tenerife, as well as its headquarters in La Laguna, Tenerife, were all inaugurated. This young institution has rapidly become the leading research centre for astronomy in Spain and achieved research standards at a European and world level. The 30th anniversary celebrations this year give an opportunity to maximize its already very active outreach programmes. In February two shows, featuring IAC researchers, and with astronomical themes, were shown in the main theatre of the city of La Laguna, and during the year further entertainment, collaborating with Canarian musicians and artists, is planned. Two exhibitions have been designed combining the anniversary with celebrations of the International Year of Light: “Listen to the Universe”, in Tenerife, and “Thirty Journeys around the Sun”, in La Palma, which will be open to the public for most of the year. A new outreach magazine “Parallaxes” will be launched by the IAC, in both paper and digital editions, and will complement the current blog, and news websites of the institute, as well as its communications on Facebook and Twitter. Among the activities being organized in Tenerife will be the formal naming of traffic circles with names of the telescopes at the Observatories. In conjunction with the municipal wine cellars of the local city of Tegueste a new Canarian wine produced by innovative methods and with an astronomical motif on its label, is to be launched during the year. All of these activities are in addition to the somewhat more routine productions of videos on the research lines of the IAC, including exoplanets, solar stellar, and interstellar physics, galaxies, and cosmology.

  3. Paediatric invasive pneumococcal disease on the island of Gran Canaria: 16-year prospective study (2001-2016).

    Science.gov (United States)

    Santana Hernández, Milagrosa; Aguiar-Santana, Ione Ahedey; Artiles Campelo, Fernando; Colino Gil, Elena

    2017-11-24

    To calculate the incidence of invasive pneumococcal disease (IPD) in the paediatric population of Gran Canaria (Spain), its clinical and epidemiological characteristics, serotype distribution, antibiotic resistance, and variations in these variables before and after the introduction of the PCV13 vaccine. Prospective hospital-based study including all patients (190) aged 0-14 years admitted with confirmed IPD between January 2001-May 2010 (152 cases) and June 2010-December 2016 (38 cases). Patients were divided into 3 age groups (5 years). Clinical symptoms were mutually-exclusively classified as meningitis, bacteraemic pneumonia, pleural effusion (PE), empyema or bacteraemia without a focus. Most cases occurred in boys (59.47%), during autumn-winter (65.79%), in children aged <2 years (55.79%) and with mean age increasing from the pre-PCV13 to the post-PCV13 period (2.5 vs 3.1 years). Incidence between periods reduced by 66.4% (p<0.001): from 13.1/100,000 to 4.4/100,000. PEs (3.9% vs 18.4%, p<0.005) and empyemas (1.5% vs 16.7%, p=NS) increased in the post-PCV13 period whereas all other symptoms decreased, although this was not statistically significant. Vaccine serotypes (77% vs 40.6%, p=0.000), particularly serotypes 19A (23.9% vs 12.5%) and 14 (14.2% vs 9.4%), as well as erythromycin resistance (57.2% vs 7.9%, p=0.000) decreased in the post-PCV13 period. IPD incidence, vaccine serotypes and erythromycin resistance decreased in the post-PCV13 period whereas PEs increased. Copyright © 2017 Elsevier España, S.L.U. and Sociedad Española de Enfermedades Infecciosas y Microbiología Clínica. All rights reserved.

  4. Plasmodium relictum (lineages pSGS1 and pGRW11): complete synchronous sporogony in mosquitoes Culex pipiens pipiens.

    Science.gov (United States)

    Kazlauskienė, Rita; Bernotienė, Rasa; Palinauskas, Vaidas; Iezhova, Tatjana A; Valkiūnas, Gediminas

    2013-04-01

    Plasmodium relictum is a widespread invasive agent of avian malaria, responsible for acute, chronic and debilitating diseases in many species of birds. Recent PCR-based studies revealed astonishing genetic diversity of avian malaria parasites (genus Plasmodium), with numerous genetic lineages deposited in GenBank. Many studies addressed distribution and evolutionary relationships of avian Plasmodium lineages, but information about patterns of development of different lineages in mosquito vectors remains insufficient. Here we present data on sporogonic development of 2 widespread mitochondrial cytochrome b lineages (cyt b) of P. relictum (pSGS1 and pGRW11) in mosquito Culex pipiens pipiens. Genetic distance between these lineages is 0.2%; they fall in a well-supported clade in the phylogenetic tree. Three P. relictum strains were isolated from common crossbill (Loxia curvirostra, lineage pSGS1), domestic canary (Serinus canaria domestica, pSGS1) and house sparrow (Passer domesticus, pGRW11). These strains were multiplied in domestic canaries and used as donors of malarial gametocytes to infect C. p. pipiens. Mosquitoes were allowed to take blood meal on infected canaries and then dissected on intervals to study development of sporogonic stages. All 3 strains developed synchronously and completed sporogony in this vector, with infective sporozoites reported in the salivary glands on the day 14 after infection. Ookinetes, oocysts and sporozoites of all strains were indistinguishable morphologically. This study shows that patterns of sporogonic development of the closely related lineages pSGS1 and pGRW11 and different strains of the lineage pSGS1 of P. relictum are similar indicating that phylogenetic trees based on the cyt b gene likely can be used for predicting sporogonic development of genetically similar avian malaria lineages in mosquito vectors. Copyright © 2013 Elsevier Inc. All rights reserved.

  5. Notas históricas y estudio de algunas plantas mesoamericanas en Canarias: piteras, tuneras y estramonios

    Directory of Open Access Journals (Sweden)

    Marcos Salas Pascual

    2013-11-01

    Full Text Available En el presente trabajo se aborda la incorporación de tres especies americanas de amplia distribución actual e introducidas plenamente en la tradición botánica del Archipiélago Canario. A través de distintas fuentes documentales se intenta clarifica la fecha de llegada a las Islas y el grado de conocimiento que se tenía de ellas en distintas épocas, así como los posibles errores cometidos históricamente en su correcta determinación botánica.Presently work is approached the incorporation of three American species of wide distribution current and introduced in the botanical tradition of the Canary Islands. Through different sources document them we tried to clarify the date of arriving to the Islands and the degree of knowledge that was had of them in different times, as well as the possible historical errors made in their correct botanical determination.

  6. Volcanic hazard assessment for the Canary Islands (Spain using extreme value theory

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    R. Sobradelo

    2011-10-01

    Full Text Available The Canary Islands are an active volcanic region densely populated and visited by several millions of tourists every year. Nearly twenty eruptions have been reported through written chronicles in the last 600 yr, suggesting that the probability of a new eruption in the near future is far from zero. This shows the importance of assessing and monitoring the volcanic hazard of the region in order to reduce and manage its potential volcanic risk, and ultimately contribute to the design of appropriate preparedness plans. Hence, the probabilistic analysis of the volcanic eruption time series for the Canary Islands is an essential step for the assessment of volcanic hazard and risk in the area. Such a series describes complex processes involving different types of eruptions over different time scales. Here we propose a statistical method for calculating the probabilities of future eruptions which is most appropriate given the nature of the documented historical eruptive data. We first characterize the eruptions by their magnitudes, and then carry out a preliminary analysis of the data to establish the requirements for the statistical method. Past studies in eruptive time series used conventional statistics and treated the series as an homogeneous process. In this paper, we will use a method that accounts for the time-dependence of the series and includes rare or extreme events, in the form of few data of large eruptions, since these data require special methods of analysis. Hence, we will use a statistical method from extreme value theory. In particular, we will apply a non-homogeneous Poisson process to the historical eruptive data of the Canary Islands to estimate the probability of having at least one volcanic event of a magnitude greater than one in the upcoming years. This is done in three steps: First, we analyze the historical eruptive series to assess independence and homogeneity of the process. Second, we perform a Weibull analysis of the

  7. Shape and Size Complexity of Deep Seafloor Mounds on the Canary Basin (West to Canary Islands, Eastern Atlantic: A DEM-Based Geomorphometric Analysis of Domes and Volcanoes

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    Olga Sánchez-Guillamón

    2018-01-01

    Full Text Available Derived digital elevation models (DEMs are high-resolution acoustic technology that has proven to be a crucial morphometric data source for research into submarine environments. We present a morphometric analysis of forty deep seafloor edifices located to the west of Canary Islands, using a 150 m resolution bathymetric DEM. These seafloor structures are characterized as hydrothermal domes and volcanic edifices, based on a previous study, and they are also morphostructurally categorized into five types of edifice following an earlier classification. Edifice outline contours were manually delineated and the morphometric variables quantifying slope, size and shape of the edifices were then calculated using ArcGIS Analyst tools. In addition, we performed a principal component analysis (PCA where ten morphometric variables explain 84% of the total variance in edifice morphology. Most variables show a large spread and some overlap, with clear separations between the types of mounds. Based on these analyses, a morphometric growth model is proposed for both the hydrothermal domes and volcanic edifices. The model takes into account both the size and shape complexity of these seafloor structures. Grow occurs via two distinct pathways: the volcanoes predominantly grow upwards, becoming large cones, while the domes preferentially increase in volume through enlargement of the basal area.

  8. Analysis of glabrous canary seeds by ELISA, mass spectrometry, and Western blotting for the absence of cross-reactivity with major plant food allergens.

    Science.gov (United States)

    Boye, Joyce Irene; Achouri, Allaoua; Raymond, Nancy; Cleroux, Chantal; Weber, Dorcas; Koerner, Terence B; Hucl, Pierre; Patterson, Carol Ann

    2013-06-26

    Glabrous (hairless) canary seed belongs to the Poaceae (Gramineae) family and could serve as an alternative source of gluten-free cereal grain. In this study, allergenic cross-reactivities between hairless, dehulled canary seeds (Phalaris canariensis) and major allergenic proteins from gluten, soy, peanuts, tree nuts, sesame, and mustard were studied using commercial enzyme-linked immune sorbent assay (ELISA) kits specific for these target allergens. Mass spectrometry (MS) and immunoblotting were further used to assess for the presence of gluten-specific protein fragments. MS results revealed the likely presence of proteins homologous with rice, oat, corn, carrot, tomato, radish, beet, and chickpea. However, no presence of celiac-related gluten fragments from wheat, rye, barley, or their derivatives was found. Immunoblotting studies yielded negative results, further confirming the absence of gluten in the canary seed samples tested. No cross-reactivities were detected between canary seeds and almond, hazelnut, mustard, peanut, sesame, soy, walnut, and gluten using ELISA.

  9. Cruise report for FS METEOR Cruise 60 Leg 3 from Las Palmas, Canary Islands to Ponta Delgada, Azores, during February 28 - March 14, 1982 (NODC Accession 0078562)

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — The focus of this cruise leg was physical oceanography of the area between the Canaries and the Azores within the program of the SFB 133 'Warm water sphere of the...

  10. [Survey of carriers of Neisseria meningitidis in the health area of Gran Canary].

    Science.gov (United States)

    García Rojas, A; Bordes Benítez, A; Lafarga Capuz, B; Vázquez Moreno, J; López Villarrubia, E; García Castellano, P; Solís Romero, J

    2000-01-01

    A) To ascertain the rate of carriers and the Types of Neisseria Meningitidis circulating in the population resident in the health jurisdiction of Gran Canaria. B) to ascertain the pattern of distribution of such carriers. A descriptive transversal design was made, with a random sampling in multiple stages and by conglomerates. A minimum sample size was determined at 707 individuals for an expected prevalence of 8.6%, with a rate of reliability of 95.6% and a precision of 0.02. Assuming that 15% if the individuals would not be willing to co-operate, the sample size was increased to 831 individuals, distributed in each conglomerate in proportion to the existing population. This size was distributed in turn into four groups by age and sex, in proportion to their significance in each basic health care zone selected at random. The individuals in the sample were identified from among those who attended the blood extraction units, and after they had passed the criteria of exclusion, their co-operation was requested as volunteers in the study. If they accepted, a questionnaire was filled out with a number of variables of epidemiological interest and a pharyngeal smear was taken. Since the Primary Care units were selected on a simple random basis, and the same method was used to select the individuals within the units, the estimate of the prevalence was made by means of an unbiased estimator. A total of 828 samples were obtained, that is, 99.6% of the number foreseen. With the exception of three, all of the individuals selected participated voluntarily in the study, a circumstance rendering it highly representative. All of the strains obtained corresponded to N. Meningitidis Serogroup B, except for one identified as N. Meningitidis Serogroup C Sero/Subtype 4:P1.2,5. The strains of N. Meningitidis serogroup B identified corresponded to 25 different sero-subtypes. The prevalence determined after having studied the sample was 6.45%, the variance = 0.0275 and the standard error

  11. Seabird diversity hotspot linked to ocean productivity in the Canary Current Large Marine Ecosystem.

    Science.gov (United States)

    Grecian, W James; Witt, Matthew J; Attrill, Martin J; Bearhop, Stuart; Becker, Peter H; Egevang, Carsten; Furness, Robert W; Godley, Brendan J; González-Solís, Jacob; Grémillet, David; Kopp, Matthias; Lescroël, Amélie; Matthiopoulos, Jason; Patrick, Samantha C; Peter, Hans-Ulrich; Phillips, Richard A; Stenhouse, Iain J; Votier, Stephen C

    2016-08-01

    Upwelling regions are highly productive habitats targeted by wide-ranging marine predators and industrial fisheries. In this study, we track the migratory movements of eight seabird species from across the Atlantic; quantify overlap with the Canary Current Large Marine Ecosystem (CCLME) and determine the habitat characteristics that drive this association. Our results indicate the CCLME is a biodiversity hotspot for migratory seabirds; all tracked species and more than 70% of individuals used this upwelling region. Relative species richness peaked in areas where sea surface temperature averaged between 15 and 20°C, and correlated positively with chlorophyll a, revealing the optimum conditions driving bottom-up trophic effects for seabirds. Marine vertebrates are not confined by international boundaries, making conservation challenging. However, by linking diversity to ocean productivity, our research reveals the significance of the CCLME for seabird populations from across the Atlantic, making it a priority for conservation action. © 2016 The Authors.

  12. Assessing qualitative long-term volcanic hazards at Lanzarote Island (Canary Islands)

    Science.gov (United States)

    Becerril, Laura; Martí, Joan; Bartolini, Stefania; Geyer, Adelina

    2017-07-01

    Conducting long-term hazard assessment in active volcanic areas is of primary importance for land-use planning and defining emergency plans able to be applied in case of a crisis. A definition of scenario hazard maps helps to mitigate the consequences of future eruptions by anticipating the events that may occur. Lanzarote is an active volcanic island that has hosted the largest (> 1.5 km3 DRE) and longest (6 years) eruption, the Timanfaya eruption (1730-1736), on the Canary Islands in historical times (last 600 years). This eruption brought severe economic losses and forced local people to migrate. In spite of all these facts, no comprehensive hazard assessment or hazard maps have been developed for the island. In this work, we present an integrated long-term volcanic hazard evaluation using a systematic methodology that includes spatial analysis and simulations of the most probable eruptive scenarios.

  13. Petrological and geochemical studies of mantle xenoliths from La Palma, Canary Islands

    Science.gov (United States)

    Janisch, Astrid; Ntaflos, Theodoros

    2015-04-01

    La Palma is the second youngest island, after El Hierro, of the Canary archipelago. The archipelago consists of seven large islands, forming an east-west-trending island chain, and several seamounts. All together they form a volcanic belt of around 800 km length and 450 km width, which presumably comprises roughly the Canary hotspot. The islands are located off the western coast of Morocco, Africa. The distance ranges from 100 km to 500 km. Concurrently with the distance, subaerial volcanism age progresses from the oldest lava in the east to the youngest in the west of the archipelago. Presently, La Palma is in the shield building stage of growth (alongside with El Hierro and Tenerife) and is furthermore the fastest growing island of the Canary archipelago. Historical volcanic eruptions are restricted on the younger islands, La Palma and El Hierro, with the last eruption at the south end of La Palma in 1971. Mantle xenoliths described in this work were collected at the slopes of San Antonio Volcano, Fuencaliente, brought to the surface during the 1677/1678 eruption. The mantle xenolith collection comprises sp-lherzolites, sp-harzburgites and pyroxenites. The texture can be distinguished between coarse-grained matrix and fine-grained veins in various thicknesses, mostly with olivine and pyroxene but also with amphibole, phlogopite as well as apatite. Mineral analyses reveal the existence of primary and secondary ol, cpx and opx. Primary ol has Fo contents of 89.2 to 91.7 and NiO ranging from 0.3 to 0.45 wt.%, whereas secondary ol show Fo values of 78.4 to 91.9 but with NiO below 0.3 wt.%. Primary cpx are predominantly Cr-Diopsides with En48.7-51.9-Wo43.5-44.3-Fs4.1-4.9 and Mg# of 91.5 to 92.4. Secondary cpx, primarily Ti-Augit, display En36.7-44.4-Wo47.7-49.6-Fs6.7-13.0 and Mg# of 75.3 to 90.8. Primary opx compositions are in range of En89.3-90.6-Wo1.3-1.5-Fs8.1-9.3 with Mg# between 90.7 and 92.0. Secondary opx exhibit En88.7-89.2-Wo1.7-1.9-Fs9.1-9.5 and Mg# of 90

  14. Administrative organization and function during the identification process for mass disasters--Canary Islands crash.

    Science.gov (United States)

    Wolcott, J H; Hanson, C A; Menzies, R; Ballo, J; Donahue, E; Hoffa, N

    1980-09-01

    The administrative functions associated with large-scale medical and identification efforts in accident investigations are substantial and contribute directly to the overall conduct of the operation. We envisioned the administrative role as one primarily responsible for integration of all antemortem and postmortem information. This required each individual involved to be thoroughly familiar with the data. This required constructions of numerous lists, charts, and records. Secondly, its role involved data storage to document the identifications made. Finally, its role required summary status reporting both during and after the main investigation. Fortunately, we haven't had many accidents the size of the one occuring in the Canary Islands. However, this leaves us with little corporate knowledge on handling administrative matters. This article is designed to explain the who, what, why, and how administration was handled in this accident, and the lessons we learned.

  15. The necessity of reconceptualizing the migration of unaccompanied minors to the Canary Islands of Spain

    Directory of Open Access Journals (Sweden)

    Esther Torrado Martín-Palomino

    2015-07-01

    Full Text Available The migration of unaccompanied foreign minors (menores extranjeros no acompañados, MENA represents a new model for international mobility in Spain, one with its own particularities compared with other migratory flows. The dual nature of being unaccompanied and unauthorized leads to conflicts in the care and integration of these new migrants. However, this dual nature is one of the main prerequisites for the development of this mobility model (but not the only one and for developing strategies specific to this group. The Canary Islands, because of their position on the southern intercontinental border and their insularity, offer particular models of individual migration flows of primarily highly vulnerable African children and a close relationship with human smuggling and trafficking networks.

  16. Methane emission to the atmosphere from landfills in the Canary Islands

    Science.gov (United States)

    Hernández, Pedro A.; Asensio-Ramos, María; Rodríguez, Fátima; Alonso, Mar; García-Merino, Marta; Amonte, Cecilia; Melián, Gladys V.; Barrancos, José; Rodríguez-Delgado, Miguel A.; Hernández-Abad, Marta; Pérez, Erica; Alonso, Monica; Tassi, Franco; Raco, Brunella; Pérez, Nemesio M.

    2017-04-01

    Methane (CH4) is one of the most powerful greenhouse gases, and is increasing in the atmosphere by 0.6% each year (Intergovernmental Panel on Climate Change, IPCC, 2013). This gas is produced in landfills in large quantities following the anaerobic degradation of organic matter. The IPCC has estimated that more than 10% of the total anthropogenic emissions of CH4 are originated in landfills. Even after years of being no operative (closed), a significant amount of landfill gas could be released to the atmosphere through its surface as diffuse or fugitive degassing. Many landfills currently report their CH4 emissions to the atmosphere using model-based methods, which are based on the rate of production of CH4, the oxidation rate of CH4 and the amount of CH4 recovered (Bingemer and Crutzen, 1987). This approach often involves large uncertainties due to inaccuracies of input data and many assumptions in the estimation. In fact, the estimated CH4 emissions from landfills in the Canary Islands published by the Spanish National Emission and Pollutant Sources Registration (PRTR-Spain) seem to be overestimated due to the use of protocols and analytical methodologies based on mathematical models. For this reason, direct measurements to estimate CH4 emissions in landfills are essential to reduce this uncertainty. In order to estimate the CH4 emissions to the atmosphere from landfills in the Canary Islands 23 surveys have been performed since 1999. Each survey implies hundreds of CO2and CH4 efflux measurements covering the landfill surface area. Surface landfill CO2 efflux measurements were carried out at each sampling site by means of a portable non-dispersive infrared spectrophotometer (NDIR) model LICOR Li800 following the accumulation chamber method. Samples of landfill gases were taken in the gas accumulated in the chamber and CO2 and CH4 were analyzed using a double channel VARIAN 4900 micro-GC. The CH4 efflux measurent was computed combining CO2 efflux and CH4/CO2 ratio

  17. Canary literature and culture in the reign of Carlos IV (1788-1808

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    Victoria GALVÁN GONZÁLEZ

    2012-02-01

    Full Text Available This work wants to offer a short view of the literature and culture developed in the Canary Isles during the reign period of Charles IV, from a general point of view. Therefore, I cannot offer a detailed perspective of each of the aspects dealt with. This way, what is tackled in this work is a revision of the socio-cultural activities connected to the gatherings or to the economic societies, the educative circumstances, the activity developed by the bishops with the carrying out of facilities or with a reforming teaching at the reading level, such as Tavira, the production of books with an allusion to the printing activity, the most developed literary genres and their authors, the topic preference in poetry —majority genre—, in prose and in theatre, and an allusion to some of the private libraries.

  18. Reproductive pattern of Pterocladiella capillacea (Gelidiales, Rhodophyta at Canary Islands (Spain, Atlantic Ocean

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    Mascha Stroobant

    2014-10-01

    Full Text Available Objective: To record the reproductive pattern of a natural population of Pterocladiella capillacea from G áldar (Canary Islands, Spain from February to August in relation to temperature, irradiance and photoperiod environmental conditions. Methods: Field observation of reproductive thalli was used at different seasons in the year. Results: Tetrasporophytes and vegetative thalli were observed during all the period of study, while female gametophytes bearing cystocarps have been found from May to August in correspondence with the highest water temperature and irradiance values. Conclusions: Our data suggest that the temperature may be the determining factor which regulates the presence of tetrasporophytes in the field. The constant presence of tetrasporophytes could depend on the low excursion range of water temperature (4-5 °C throughout the period of study, with the highest abundance in February at 20 °C.

  19. Contribution of bioanthropology to the reconstruction of prehistoric productive processes. The external auditory exostoses in the prehispanic population of Gran Canaria

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    Velasco Vázquez, Javier

    2001-06-01

    Full Text Available The aim of this paper is an approach to the role of bioanthropological studies in the reconstruction of the productive processes of past societies. This objective is obtained starting from the survey and valuation of the prevalence of bone exostoses in the auditory canal among the prehistoric inhabitants of Gran Canaria. The auditory exostose is a bone wound well documented through clinical and experimental studies, closely related to the exposure of the auditory canal to cold water. The estimation of this bone anomaly among the analysed population, leads to the definition of outstanding territorial variations in the economic strategies of these human groups.

    En el presente trabajo se pretende abordar el papel de los estudios bioantropológicos en la reconstrucción de los procesos productivos de las sociedades del pasado. Esta finalidad es perseguida a partir del examen y valoración de la prevalencia de exostosis óseas en el canal auditivo en la población prehistórica de Gran Canaria. Las exostosis auditivas constituyen una lesión ósea, bien documentada en trabajos experimentales y clínicos, estrechamente relacionada con la exposición del canal auditivo al agua fría. La estimación de esta anormalidad ósea en el conjunto poblacional analizado permite la definición de importantes variaciones territoriales en las estrategias económicas emprendidas por estos grupos humanos.

  20. Vertical distribution, composition and migratory patterns of acoustic scattering layers in the Canary Islands

    KAUST Repository

    Ariza, A.

    2016-01-21

    Diel vertical migration (DVM) facilitates biogeochemical exchanges between shallow waters and the deep ocean. An effective way of monitoring the migrant biota is by acoustic observations although the interpretation of the scattering layers poses challenges. Here we combine results from acoustic observations at 18 and 38 kHz with limited net sampling in order to unveil the origin of acoustic phenomena around the Canary Islands, subtropical northeast Atlantic Ocean. Trawling data revealed a high diversity of fishes, decapods and cephalopods (152 species), although few dominant species likely were responsible for most of the sound scattering in the region. We identified four different acoustic scattering layers in the mesopelagic realm: (1) at 400–500 m depth, a swimbladder resonance phenomenon at 18 kHz produced by gas-bearing migrant fish such as Vinciguerria spp. and Lobianchia dofleini, (2) at 500–600 m depth, a dense 38 kHz layer resulting primarily from the gas-bearing and non-migrant fish Cyclothone braueri, and to a lesser extent, from fluid-like migrant fauna also inhabiting these depths, (3) between 600 and 800 m depth, a weak signal at both 18 and 38 kHz ascribed either to migrant fish or decapods, and (4) below 800 m depth, a weak non-migrant layer at 18 kHz which was not sampled. All the dielly migrating layers reached the epipelagic zone at night, with the shorter-range migrations moving at 4.6 ± 2.6 cm s − 1 and the long-range ones at 11.5 ± 3.8 cm s − 1. This work reduces uncertainties interpreting standard frequencies in mesopelagic studies, while enhances the potential of acoustics for future research and monitoring of the deep pelagic fauna in the Canary Islands.

  1. Cardiovascular comorbidity in patients with chronic obstructive pulmonary disease in the Canary Islands (CCECAN study).

    Science.gov (United States)

    Figueira Gonçalves, Juan Marco; Dorta Sánchez, Rafael; Rodri Guez Pérez, María Del Cristo; Viña Manrique, Pedro; Díaz Pérez, David; Guzmán Saenz, Cristina; Palmero Tejera, Juan Manuel; Pérez Rodríguez, Alicia; Pérez Negrín, Lorenzo

    Numerous studies have shown a high prevalence of cardiovascular disease in patients with chronic obstructive pulmonary disease (COPD). The aim of this study was to analyse the prevalence of cardiovascular risk factors and comorbidity in a Canary Islands population diagnosed with COPD, and compared it with data from the general population. A cross-sectional study was carried out in 300 patients with COPD and 524 subjects without respiratory disease (control group). The two groups were compared using standard bivariate methods. Logistic regression models were used to estimate the cardiovascular risks in COPD patients compared to control group. Patients with COPD showed a high prevalence of hypertension (72%), dyslipidaemia (73%), obesity (41%), diabetes type 2 (39%), and sleep apnoea syndrome (30%) from mild stages of the disease (GOLD 2009). There was a 22% prevalence of cardiac arrhythmia, 16% of ischaemic heart disease, 16% heart failure, 12% peripheral vascular disease, and 8% cerebrovascular disease. Compared to the control group, patients with COPD had a higher risk of dyslipidaemia (OR 3.24, 95% CI; 2.21-4.75), diabetes type 2 (OR 1.52, 95% CI; 1.01-2,28), and ischaemic heart disease (OR 2.34, 95% CI; 1.22-4.49). In the case of dyslipidaemia, an increased risk was obtained when adjusted for age, gender, and consumption of tobacco (OR 5.04, 95% CI; 2.36-10.74). Patients with COPD resident in the Canary Islands have a high prevalence of hypertension, dyslipidaemia, ischaemic heart disease, and cardiac arrhythmia. Compared to general population, patients with COPD have a significant increase in the risk of dyslipidaemia. Copyright © 2017 Sociedad Española de Arteriosclerosis. Publicado por Elsevier España, S.L.U. All rights reserved.

  2. Multi-event behavior of El Golfo landslide (El Hierro Island, Canary Archipelago)

    Science.gov (United States)

    León, Ricardo; Biain, Ander; Urgeles, Roger; Somoza, Luis; Ferrer, Mercedes; García-Crespo, Jesús; Francisco Mediato, José; Galindo, Inés; Yepes, Jorge; Gimenez-Moreno, Julia

    2017-04-01

    Based on the re-interpretation of a vast onshore-offshore data set, a new morpho-structural characterization of the El Golfo giant landslide in the island of El Hierro (Canary Archipelago, Spain) is presented. Offshore multibeam echosounder data, chirp sub-bottom profiles, multichannel seismic reflection data and onshore information from water wells and galleries have been analyzed to determine the nature of the event. The subaerial headscarp shows a non-continuous arcuate profile formed by two nested semi-circular amphitheaters that extend offshore along a smooth chute, suggesting the occurrence of at least two large retrogressive events. Channels/gullies and escarpments developed along the submarine sector of the scar also indicate smaller-scale events and predominance of sediment bypass. At the base of submerged island, two subunits within the related submarine mass transport deposit (MTD) are identified on multichannel seismic reflection profiles confirming the multi-event nature of the landslide. The MTD, identified as a debris avalanche, has a total estimated volume of 318 km3: 84 km3 and 234 km3, for the lower and upper subunits respectively. Data from wells and galleries show abrasion platforms with beach deposits at sea-level (0 masl) formed after the landslide scar and buried by the El Golfo post-collapse infill lavas, suggesting an age at least older than 23.5-82.5 ka for the landslide. This work has been supported by the projects IGCP-640 S4SLIDE, High resolution seabed mapping EASME/EMFF/2016/005 and CTM2010-09496-E. Keywords: Submarine landslides, volcanic islands, debris avalanche, Canary Islands

  3. Bereavement care interventions and outcome criteria planned by community nurses in the Canary Islands.

    Science.gov (United States)

    Rodríguez-Álvaro, Martín; García-Hernández, Alfonso Miguel; Brito-Brito, Pedro Ruymán; Aguirre-Jaime, Armando; Fernández-Gutiérrez, Domingo Ángel

    2018-02-19

    Nursing care in bereavement is complex. Primary health care is the ideal setting to support the bereaved, but we do not know much about the care plans designed by primary health care nurses in the treatment of grief. To identify the outcomes criteria and interventions planned by nurses for mourners with and without complications in the Canary Islands. Retrospective longitudinal study, using the electronic health records of the Canary Islands health service of people with a diagnosis of grieving, risk of complicated grieving and complicated grieving, in the period 2009-2014. NOC outcomes criteria were recorded in 67% of the mourners, and up to 24 different outcomes were identified. The main outcomes measures were Grief resolution; Psychosocial adjustment, Life change; Coping; Family coping; Family social climate and Caregiver emotional health. The remaining outcomes were present in less than 1% of the mourners. Although the outcomes criteria proposed by nurses in the mourners with and without complications were quite homogeneous, differences in interventions were found. In 67% of the cases, NIC interventions were reported. Ninety-nine different interventions were identified in the mourners; the most frequent were Emotional support; Grief work facilitation; Active listening; Coping enhancement and counselling. The remaining identified interventions were present in less than 5% of patients. The main interventions in the mourners with complications were Grief work facilitation; Coping enhancement; Active listening; Counselling and Family integrity promotion. Nurses state that there are more interventions and outcomes in mourners with complications. Given the few methodologically reliable studies that prove their effectiveness, continued research in this area is recommended. Copyright © 2017 Elsevier España, S.L.U. All rights reserved.

  4. A Lagrangian study tracing water parcel origins in the Canary Upwelling System

    Directory of Open Access Journals (Sweden)

    Evan Mason

    2012-08-01

    Full Text Available The regional ocean circulation within the Canary Upwelling System between 31°N and 35°N is studied using numerical tools. Seasonal mean and near-instantaneous velocity fields from a previously-generated climatological Regional Ocean Modelling System (ROMS solution of the Canary Basin are used to force a series of offline Lagrangian particle-tracking experiments. The primary objective is to identify the pathways through which water parcels arrive at the upwelling region north of Cape Ghir. Examining year-long pathways, the Azores Current contributes over 80% of particles annually, of which a large proportion arrive directly from offshore (from the northwest, while others travel along the shelf and slope from the Gulf of Cadiz. The remaining ~20% originate within the Gulf of Cadiz or come from the south, although the southern contribution is only significant in autumn and winter. When season-long pathways are considered, the alongshore contributions become increasingly important: northern contributions reach 40% in spring and summer, while southern values exceed 35% in winter. This study also shows that coastal upwelling changes both spatially and temporally. Upwelling becomes intensified near Cape Beddouza, with most upwelling occurring within ~40 km from shore although significant values may reach as far as 120 km offshore north of Cape Beddouza; at these locations the offshore integrated upwelling reaches as much as 4 times the offshore Ekman transport. In the Cape Beddouza area (32°N to 33°N, upwelling is negligible in February but intensifies in autumn, reaching as much as 3 times the offshore Ekman transport.

  5. Proceedings of the International Association for Development of the Information Society (IADIS) International Conference on e-Learning (Las Palmas de Gran Canaria, Spain, July 21-24, 2015)

    Science.gov (United States)

    Nunes, Miguel Baptista, Ed.; McPherson, Maggie, Ed.

    2015-01-01

    These proceedings contain the papers of the International Conference e-Learning 2015, which was organised by the International Association for Development of the Information and Society and is part of the Multi Conference on Computer Science and Information Systems (Las Palmas de Gran Canaria, Spain, July 21-24, 2015). The e-Learning 2015…

  6. Gastro-enteritis outbreak among Nordic patients with psoriasis in a health centre in Gran Canaria, Spain: a cohort study

    Directory of Open Access Journals (Sweden)

    Rose Angela MC

    2004-10-01

    Full Text Available Abstract Background Between November 2 and 10, 2002 several patients with psoriasis and personnel staying in the health centre in Gran Canaria, Spain fell ill with diarrhoea, vomiting or both. Patient original came from Norway, Sweden and Finland. The patient group was scheduled to stay until 8 November. A new group of patients were due to arrive from 7 November. Methods A retrospective cohort study was conducted to assess the extent of the outbreak, to identify the source and mode of transmission and to prevent similar problems in the following group. Results Altogether 41% (48/116 of persons staying at the centre fell ill. Norovirus infection was suspected based on clinical presentations and the fact that no bacteria were identified. Kaplan criteria were met. Five persons in this outbreak were hospitalised and the mean duration of diarrhoea was 3 days. The consequences of the illness were more severe compared to many other norovirus outbreaks, possibly because many of the cases suffered from chronic diseases and were treated with drugs reported to affect the immunity (methotrexate or steroids. During the two first days of the outbreak, the attack rate was higher in residents who had consumed dried fruit (adjusted RR = 3.1; 95% CI: 1.4–7.1 and strawberry jam (adjusted RR = 1.9; 95% CI: 0.9–4.1 than those who did not. In the following days, no association was found. The investigation suggests two modes of transmission: a common source for those who fell ill during the two first days of the outbreak and thereafter mainly person to person transmission. This is supported by a lower risk associated with the two food items at the end of the outbreak. Conclusions We believe that the food items were contaminated by foodhandlers who reported sick before the outbreak started. Control measures were successfully implemented; food buffets were banned, strict hygiene measures were implemented and sick personnel stayed at home >48 hours after last

  7. Presentación de la cohorte "CDC de Canarias": objetivos, diseño y resultados preliminares

    Directory of Open Access Journals (Sweden)

    Antonio Cabrera de León

    2008-01-01

    Métodos: Estudio prospectivo con muestreo aleatorio en población general, en el que participaron 6.729 personas entre los años 2000 y 2005 (edad 18-75 años. Se les realizó antropometría y se extrajo sangre para almacenamiento de muestras séricas y genéticas. Mediante cuestionario se recogió: hábitos dietéticos, actividad física, antecedentes personales y familiares de enfermedad, exposición a FR laborales o ambientales, tabaquismo, etc. Resultados: La prevalencia de obesidad es casi del 30%, sin diferencias entre sexos, pero el sobrepeso afecta más a los varones (45 vs. 33%; p<0'001, los cuales presentan también mayor prevalencia de diabetes (12 vs. 10%; p =0'005, hipertensión (43 vs. 33%; p<0'001, ingesta excesiva de alcohol (13 vs. 2%; p<0'001 y falta de protección solar (46 vs. 18%; p<0'001. En las mujeres es más frecuente la exposición a bajos niveles de colesterol HDL (37 vs. 30%; p<0'001 y al sedentarismo (71 vs. 55%; p<0'001. La exposición a los FR estudiados, entre ellos la pobreza, es mayor en edades avanzadas, salvo el tabaquismo (26% que es mayor en edades jóvenes. La estimación de riesgos relativos de exposición a los factores de riesgo cardiovascular y de cáncer es más alta en las clases sociales pobres. Conclusiones: La actual población adulta de Canarias presenta una elevada prevalencia de exposición a factores de riesgo para las enfermedades cardiovasculares, la diabetes y el cáncer, destacando especialmente el sobrepeso, la obesidad y el sedentarismo.

  8. The seasonal planktonic cycle in coastal waters of the Canary Islands

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    Javier Arístegui

    2001-07-01

    Full Text Available The short-term temporal variation in the phytoplankton and mesozooplankton cycles was studied in a coastal area off east Gran Canaria Island. A small phytoplankton bloom, split into two peaks, appeared during late winter (end of February and March, coinciding with the lowest temperatures in the water column. A clear inverse relationship was observed between the biomasses in mesozooplankton and phytoplankton during the bloom period. The peaks in primary production and phytoplankton biomass were uncoupled in time, suggesting that biomass could depend on consumer control (grazing, and primary production on resource control (nutrients. Mesozooplankton grazing represented less than 20% of the primary production, an indication that small zooplankton and protozoans controlled the phytoplankton populations, dominated by picoplanktonic cells (> 60% of the primary production. The ratio between depth-integrated primary production and community respiration (P/R covaried with primary production (P, showing that changes in P control the trophic status of the system. At P > 400 mgC m-2 day-1 the P/R ratio is > 1, switching the system from heterotrophy to autotrophy, a situation that takes place during the phytoplankton growth period.

  9. The challenges of the Canary Islands' wine sector and its implications: A longitudinal study.

    Directory of Open Access Journals (Sweden)

    Abel Duarte Alonso

    2012-01-01

    Full Text Available Noticias y reportajes reconocen los retos a los que las regiones vinícolas españolas se enfrentan, incluyendo las Islas Canarias, donde las denominaciones de origen (DO existen desde hace menos de dos décadas. El presente estudio es una extensión de una investigación previa conducida en la industria vinícola de las islas, y profundiza en los hechos que están ocurriendo en el sector vitivinícola isleño. Dueños, enólogos y gerentes de 55 bodegas de seis islas que producen vinos participaron en entrevistas cara a cara y telefónicas. El sentimiento general entre los participantes es de seria preocupación, y los problemas actuales no parecen tener soluciones a corto plazo. El estudio presenta las posibles repercusiones de losresultados del estudio, incluyendo aquellos pertinentes al futuro del sector vitivinícola local, su cultura vinícola y tradición.

  10. Effectiveness of plant growth promoting rhizobacteria in facilitating lead and nutrient uptake by little seed canary grass

    OpenAIRE

    Zaefarian,Faezeh; Vahidzadeh, Samaneh; Rahdari, Parvaneh; Rezvani, Mohammad; Zadeh, Hossein Ghani

    2012-01-01

    We investigated the effectiveness of Nitroxin inoculation on lead (Pb) and nutrient uptakes by little seed canary grass. The factors tested included inoculation (or not) with Nitroxin and different soil concentrations of Pb (0, 200, 400 and 800mgPbkg-1 soil). Increasing soil concentrations of Pb decreased stem, leaf and root dry weights. Shoot phosphorus concentrations increased in parallel with increasing soil Pb concentrations. Nitroxin inoculation did not alter the phosphorus concentration...

  11. Highlights of consumption and satisfaction in nautical tourism. A comparative study of visitors to the Canary Islands and Morocco

    OpenAIRE

    Lam González, Yen E.; Carmelo J. León González; Javier de León Ledesma

    2015-01-01

    Nautical tourism is considered to be an under-exploited research area, taking into account its evolution and growth prospects. The present study was conducted with nautical tourists during their visit to the Canary Islands and Morocco between 2013 and 2014. Our aim is to better guide the creation of new joint businesses by determining the most demanded activities among the nautical tourists that visit this part of the world. Some findings indicate that tourists’ consumption and satisfaction v...

  12. An Evaluation of the Elbit Canary and DynaSense PocketNIRS In-Flight Physiological Monitoring Systems

    Science.gov (United States)

    2017-01-04

    physiological readings as these were expected to return to baseline within minutes of return to sea level. Results Analysis overview All data...Naval Medical Research Unit Dayton AN EVALUATION OF THE ELBIT CANARY AND DYNASENSE POCKETNIRS IN-FLIGHT PHYSIOLOGICAL MONITORING SYSTEMS...Defense, nor the U.S. Government. This work was funded by work unit number H1506 and 711th Human Performance Wing. The study protocol was

  13. Endoparasites of Trachurus picturatus (Pisces: Carangidae from the Madeira and Canary Islands: Selecting parasites for use as tags

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    Graça Costa

    2013-03-01

    Full Text Available In order to evaluate the use of parasites as biological tags to identify populations of the oceanic horse mackerel, Trachurus picturatus, two samples of 100 fish each, caught off the Madeira and Canary Islands from January to June 2009, were examined for the presence of anisakids, trypanorhynchs, acanthocephalans and liver coccidians. In T. picturatus from Madeira, prevalence of the coccidian Goussia cruciata reached 82%, whereas prevalence of the nematode Anisakis sp., the acanthocephalan Rhadinorhynchus cadenati and the trypanorhynch Nybelinia lingualis were 12.0%, 8.9% and 7.0%, respectively. In samples from the Canary Islands, prevalence of G. cruciata was 8.0%, Anisakis sp. and R. cadenati reached 5.0% and 42.0% respectively, and N. lingualis was not recovered. The absence of N. lingualis and the lower prevalence of Anisakis sp. appear to be related to the smaller size of the oceanic horse mackerels examined from the Canary Islands. Although significant differences in prevalence of two parasites, G. cruciata and R. cadenati, were found between the two regions investigated (χ2=125.13, df=1, p=0.000 and χ2=40.77, df=1, p=0.000, only G. cruciata was considered useful as a biological tag for the identification of populations of T. picturatus. In order to reach sound conclusions, an expansion of the temporal and spatial sampling strategy is recommended.

  14. Age validation of canary rockfish (Sebastes pinniger) using two independent otolith techniques: lead-radium and bomb radiocarbon dating.

    Energy Technology Data Exchange (ETDEWEB)

    Andrews, A H; Kerr, L A; Cailliet, G M; Brown, T A; Lundstrom, C C; Stanley, R D

    2007-11-04

    Canary rockfish (Sebastes pinniger) have long been an important part of recreational and commercial rockfish fishing from southeast Alaska to southern California, but localized stock abundances have declined considerably. Based on age estimates from otoliths and other structures, lifespan estimates vary from about 20 years to over 80 years. For the purpose of monitoring stocks, age composition is routinely estimated by counting growth zones in otoliths; however, age estimation procedures and lifespan estimates remain largely unvalidated. Typical age validation techniques have limited application for canary rockfish because they are deep dwelling and may be long lived. In this study, the unaged otolith of the pair from fish aged at the Department of Fisheries and Oceans Canada was used in one of two age validation techniques: (1) lead-radium dating and (2) bomb radiocarbon ({sup 14}C) dating. Age estimate accuracy and the validity of age estimation procedures were validated based on the results from each technique. Lead-radium dating proved successful in determining a minimum estimate of lifespan was 53 years and provided support for age estimation procedures up to about 50-60 years. These findings were further supported by {Delta}{sup 14}C data, which indicated a minimum estimate of lifespan was 44 {+-} 3 years. Both techniques validate, to differing degrees, age estimation procedures and provide support for inferring that canary rockfish can live more than 80 years.

  15. Origin of three-armed rifts in volcanic islands: the case of El Hierro (Canary Islands)

    Science.gov (United States)

    Galindo Jiménez, Inés; Becerril Carretero, Laura; Martí Molist, Joan; Gudmundsson, Agust

    2015-04-01

    Rifts zones in volcanic oceanic islands are common structures that have been explained through several theories/models. However, despite all these models it is as yet unclear whether it is the intense intrusive activity or the sector collapses that actually control the structural evolution and geometry of oceanic-island rift zones. Here we provide a new hypothesis to explain the origin and characteristics of the feeding system of oceanic-island rift zones based on the analysis of more than 1700 surface, subsurface (water galleries), and submarine structural data from El Hierro (Canary Islands). El Hierro's geological structure is primarily controlled by a three-armed rift-zone, the arms striking NE, WSW and S. Between the rift axes there are three valleys formed during huge landslides: El Golfo, El Julan, and Las Playas. Our results show: (1) a predominant NE-SW strike of structural elements, which coincides with the main regional trend of the Canary Archipelago as a whole; (2) a clear radial strike distribution of structural elements for the whole volcanic edifice (including submarine flanks) with respect to the centre of the island; (3) that the rift zones are mainly subaerial structures and do not propagate through the submarine edifice; (4) that it is only in the NE rift that structures have a general strike similar to that of the rift as a whole, and; (5) that in the W and S rifts there is not clear main direction, showing the structural elements in the W rift a fan distribution coinciding with the general radial pattern in the island as a whole. Based on these data, we suggest that the radial-striking structures reflect comparatively uniform stress fields that operated during the constructive episodes, mainly conditioned by the combination of overburden pressure, gravitational spreading, and magma-induced stresses. By contrast, in the shallower parts of the edifice, that is, the NE-SW, N-S and WNW-ESE-striking structures, reflect local stress fields related

  16. Monitoring serum PCB levels in the adult population of the Canary Islands (Spain

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    Guillermo Burillo-Putze

    2015-07-01

    Full Text Available Polychlorinated biphenyls (PCBs are persistent organic chemicals that have been detected in human serum or tissues all over the world. These pollutants could exert a number of deleterious effects on humans and wildlife, including carcinogenic processes. The Spanish population of the Canary Islands was evaluated with respect to PCB levels more than ten years ago showing lower levels than other Western populations. The objective of our study was to assess the current level of contamination by PCBs showed by this population. We measured serum PCBs in a sample of healthy adult subjects (206 serum samples from subjects with an average age of 66 years old to evaluate the potential modification of PCB serum levels in this population during the last decade. PCB congeners (28, 52, 77, 81, 101, 105, 114, 118, 123, 126, 138, 153, 156, 157, 167, 169, 180, and 189 were measured by gas chromatography-mass spectrometry (GC/MS. Our results showed that PCB residues were found in 84% of serum samples analyzed, the congeners 28, 153 and 180 being the most frequently detected and at the highest median values (0.1 ng/mL. In addition, the median concentration of the sum of those PCBs considered as markers of environmental contamination by these chemicals (Marker-PCBs was 0.6 ng/mL, reaching values as high as as 2.6 ng/mL in the 95th percentile. Levels of the sum of PCBs with toxic effects similar to dioxins (dioxin-like PCBs reached median values of 0.4 ng/mL in the 95th percentile. The reported levels are similar to those described previously in this population more than ten years ago, in the sense that the inhabitants of the Canary Archipelago show levels of PCB contamination lower than the majority of populations from developed countries. These findings suggest that currently there is not any active source of these chemicals in this archipelago. Nevertheless, as foods seem to be a relevant source for these compounds, Public Health authorities should monitor the

  17. Tendencias poblacionales recientes de la avutarda hubara en las Islas Canarias: análisis metodológico y estado de conservación

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    Schuster, C.

    2012-01-01

    Full Text Available Recent population trends of the houbara bustard in the Canary Islands. Methods and conservation statusDetermining conservation status requires rigorous and reliable data about population sizes and trends, especially if they have to be applied to islands where the species have small populations. The Canary bustard houbara (Chlamydotis undulata fuertaventurae is catalogued as ‘in danger’ by the Red Book of the Birds of Spain. This work analyzes the value of previously published information on the species using the method of adjacent linear transects separated by 200 m, as a baseline for establishing robust population trends in 30 important areas (ranging from 1.3 to 12.8 km2 for the houbara in the islands of Lanzarote and Fuerteventura (Canary Islands. Censuses were repeated on the same dates (from November to December and localities as those carried out in 1994, 2004 and 2006. The detection probability of the houbara was estimated by means of distance sampling, being 0.42 up to 250 m from the observer, and 0.82 in the main census belt of 100 m on either side of the line transect. The method of adjacent linear transects —counting the maximum number of hubaras detected— provides accurate figures of population densities (detection of 95.2% of the birds. The previous estimations of houbara densities can therefore be considered highly trustworthy, with a probable average underestimation of only 5 %. Nevertheless, the confidence intervals of density estimations using only one census were very large. Therefore, with only one census per sampling area and year it is not possible to obtain precise estimates of houbara densities with small variation around the average value. This raises concern when trying to obtain solid evidence about the increases–decreases of houbara populations comparing different dates or study areas. The density of the Canary Island hubara bustard decreased significantly from 2004/2006 to 2011 in eight areas of

  18. El Pedal de Resonancia: su enseñanza en los conservatorios y centros autorizados de música de Canarias

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    Oliver Curbelo

    2010-12-01

    Full Text Available One of the most neglected resources in piano pedagogy, and one that plays a very important role in piano teaching, is the use of the damper pedal. In fact, we have found that at higher levels of study students not only fail achieve the requisite autonomy, but also use it incorrectly. This happens due to a lack of printed resources, theoretical as well as practical, that greatly hinder teaching of this aspect. This study attempts to look into methodologies of teachers at conservatories and schools in the Canary Islands along with the common problems generally found among students in elementary education, high schools, and professional studies.

  19. COYUNTURA ECONÓMICA Y CAMBIO EN LOS USOS DEL SUELO EN LA ISLA DE LA PALMA (CANARIAS, EL EJEMPLO DEL MUNICIPIO DE TAZACORTE

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    Carlos S. Martín Fernández

    2011-01-01

    Full Text Available El sector terciario y, en concreto, el turismo ha constituido el eje estructurador de la economía canaria en las últimas décadas. Un proceso que, en competencia con la agricultura, no se ha manifestado de igual forma en todas las islas. En esta línea, presentamos lo acontecido en la isla de La Palma, donde una rentable agricultura comercial, y por tanto un escaso interés de los propietarios por el cambio sectorial, ralentizó la penetración del fenómeno turístico. Para explicar este fenómeno, utilizamos el ejemplo del municipio de Tazacorte, uno de los emblemáticos enclaves plataneros insulares y, a la vez, uno de los más activos en el reciente cambio de funcionalización territorial.

  20. La probabilidad de permanencia y el envío de remesas del inmigrante internacional: evidencia empírica para Gran Canaria

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    Anastasia Hernández Alemán

    2013-03-01

    Full Text Available En este trabajo se analiza la influencia de las características personales y familiares, además de la renta laboral, en la intención de permanencia defi nitiva del inmigrante internacionalen Canarias. Se presta especial atención al papel que ejercen los antecedentes familiares en el destino en la decisión de permanencia definitiva y cómo afecta esta intención al envío de remesas a origen. Se plantea un modelo teórico que tomando como base la maximización de la función de utilidad familiar explica el comportamientodel migrante internacional. La evidencia empírica proviene de una muestra de inmigrantes extranjeros residentes en la isla de Gran Canaria. Los resultados permiten probar, por una parte, que la existencia de familiares en el destino y los años deestancia inciden positivamente en la intención de permanencia y, por otra parte, que los inmigrantes que tienen la intención de permanecer gastan como media más en consumo en el destino que los inmigrantes que no tienen la intención de permanecer.Circunstancia esta última que afecta al envío de remesas a origen.Este análisis tiene implicaciones tanto para la política de inmigración como para las economías de origen y de destino.

  1. Del “mar es de todos” al mar reservado: turistas, poblaciones de pescadores y reservas marinas en Canarias

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    José J. Pascual

    2003-01-01

    Full Text Available Los patrones de desarrollo de las últimas décadas en Canarias y en otras zonas del Estado han originado nuevos usos del espacio marítimo y litoral. Frente a los tradicionales vinculados a la pesca, ahora dominan frecuentemente los turísticos y recreativos. La naturaleza, construida o recreada, se convierte especialmente en los últimos años en un atractivo clave para muchos destinos. En este contexto, las reservas marinas intentan preservar ciertas zonas de especial valor biológico de los excesos de la pesca, a la vez que deberían conjugar los usos turísticos y recreativos a realizar en tales espacios con la conservación de sus valores naturales. En Canarias han constituido uno de los instrumentos claves de la política de conservación y gestión de pesquerías en las áreas costeras de las Islas. Actualmente hay tres en funcionamiento, siguiendo una tendencia cada vez más general en todo el mundo. Pero a la vez que con ellas se controla la extracción de recursos por los profesionales, se impulsan una serie de usos vinculados a determinadas formas de turismo que han generado importantes transformaciones en las poblaciones vinculadas a estas zonas protegidas. Otros impactos inducidos por el turismo o la acuicultura han alterado también sus estrategias económicas o el uso de los espacios tanto en tierra como en el mar

  2. Photo-protective mechanisms in reed canary grass to alleviate photo-inhibition of PSII on the Qinghai-Tibet Plateau.

    Science.gov (United States)

    Zhang, Chao; Zhang, Da-Wei; Sun, Yan-Ni; Arfan, Muhammad; Li, Da-Xu; Yan, Jia-Jun; You, Ming-Hong; Bai, Shi-Qie; Lin, Hong-Hui

    2017-08-01

    Due to its characteristic of high biomass yield potential, there is considerable interest in cultivating Phalaris arundinacea L. cv. 'chuancaoyin No.3' (reed canary grass) on the Qinghai-Tibet Plateau where there is an abundance of alpine steppe meadow and a potential large market for animal husbandry. In this study, we 1) investigate whether reed canary grass exhibits superior productive capacity to Elymus nutans 'Aba' (E. nutans), ordinary common pasture, during the long warm days of summer at high-altitude; and 2) compare the cold tolerance between reed canary grass and E. nutans, including photosynthesis, photo-inhibition, and photo-protection. The results suggest that reed canary grass exhibits higher photosynthetic capacity compared to E. nutans at latitudes of the cool temperate zone. Meanwhile, cold-induced photo-inhibition and photo-damage at high altitudes in reed canary grass were due to both stomatal and non-stomatal limitation, and the enhancement in photo-respiration, thermal dissipation, and Mehler reaction are important processes to minimize the negative effects of high elevation and a cold environment. Copyright © 2017 The Authors. Published by Elsevier GmbH.. All rights reserved.

  3. [Methodology for an appreciative, dynamic and collaborative process: 3rd Canary Islands (Spain) Health Plan].

    Science.gov (United States)

    O'Shanahan Juan, José Joaquín; Hernández Rodríguez, Miguel Ángel; Del Otero Sanz, Laura; Henríquez Suárez, José Andrés; Mahtani Chugani, Vinita

    The need for new approaches to strategic planning by incorporating the perspectives of professionals and inhabitants has led to a new model for the 3rd Canary Islands (Spain) Health Plan (IIIPSC). A dual-phase participatory process using qualitative techniques is proposed: 1) local phase: a quantitative and qualitative study based on training and a research-action-participation initiative; and 2) insular phase: health conferences with face-to-face discussion of results in each health area (island) and proposals for action. The process prioritises problems and establishes a specific action plan for each island through initiatives that are considered to be viable, grouped by themes and weighted according to the potential impact on priority problems. This process of interaction may help to guide planning model changes and health policy decision-making, and was included in the IIIPSC Project for its parliamentary procedure. Copyright © 2016 SESPAS. Publicado por Elsevier España, S.L.U. All rights reserved.

  4. Food availability and competition do not modulate the costs of Plasmodium infection in dominant male canaries.

    Science.gov (United States)

    Larcombe, Stephen; Bichet, Coraline; Cornet, Stéphane; Faivre, Bruno; Sorci, Gabriele

    2013-12-01

    Understanding the different factors that may influence parasite virulence is of fundamental interest to ecologists and evolutionary biologists. It has recently been demonstrated that parasite virulence may occur partly through manipulation of host competitive ability. Differences in competitive ability associated with the social status (dominant or subordinate) of a host may determine the extent of this competition-mediated parasite virulence. We proposed that differences between subordinate and dominant birds in the physiological costs of infection may change depending on the level of competition in social groups. We observed flocks of domestic canaries to determine dominant or subordinate birds, and modified competition by providing restricted (high competition) or ad libitum food (low competition). Entire flocks were then infected with either the avian malaria parasite, Plasmodium relictum or a control. Contrary to our predictions we found that the level of competition had no effect on the outcome of infection for dominant or subordinate birds. We found that dominant birds appeared to suffer greater infection mediated morbidity in both dietary treatments, with a higher and more sustained reduction in haematocrit, and higher parasitaemia, than subordinates. Our results show that dominance status in birds can certainly alter parasite virulence, though the links between food availability, competition, nutrition and virulence are likely to be complex and multifaceted. Copyright © 2013. Published by Elsevier Inc.

  5. Psychophysical evidence of damaged active processing mechanisms in Belgian Waterslager Canaries.

    Science.gov (United States)

    Lauer, Amanda M; Dooling, Robert J; Leek, Marjorie R

    2009-02-01

    Belgian Waterslager canaries (BWC), bred for a distinct low-pitched song, have an inherited high-frequency hearing loss associated with hair cell abnormalities. Hair cells near the abneural edge of the papilla, which receive primarily efferent innervation in normal birds, are among the most severely affected. These cells are thought to support nonlinear active processing in the avian ear, though the mechanisms are poorly understood. Here we present psychophysical evidence that suggests degraded active processing in BWC compared to normal-hearing non-BWC. Critical ratios, psychophysical masking patterns and phase effects on masking by harmonic complexes were measured in BWC and non-BWC using operant conditioning procedures. Critical ratios were much larger in BWC than in non-BWC at high frequencies. Psychophysical tuning curves derived from the masking patterns for BWC were broadened at high frequencies. BWC also showed severely reduced phase effects on masking by harmonic complexes compared to non-BWC. As has been hypothesized previously for hearing-impaired humans, these results are consistent with a loss of active processing mechanisms in BWC.

  6. Atoxoplasmosis in canary fledglings: severe lymphocytic enteritis with preferential parasitism of B lymphocytes.

    Science.gov (United States)

    Maslin, William R; Latimer, Kenneth S

    2009-09-01

    All fledgling canaries (Serinum canarius) in a small private aviary died from atoxoplasmosis during a single breeding season. The birds were clinically normal when removed from their parents at 2 mo of age, but by 3 mo of age all had died following an illness characterized by progressive lethargy, anorexia, and debilitation. Cachexia, splenomegaly, and pale foci in the liver were evident at necropsy. Microscopically, there was striking infiltration of the intestinal lamina propria by mononuclear cells that contained intracytoplasmic protozoa. Protozoa were also observed in mononuclear cells in splenic and hepatic sinusoids and in vascular or perivascular spaces of other organs, but were much less numerous. Ultrastructural features of infected enteric mononuclear cells were suggestive of lymphocytes, and the majority of parasitized cells in paraffin sections of intestine were positive for CD-79 antigen, consistent with B lymphocytes. CD-3 staining was minimal, suggesting little or no T-cell infection. The following year, after egg-laying was completed, adults were treated with sulfadimethoxine, and no further fledgling losses occurred.

  7. Palaeomagnetic constraints on the age of Lomo Negro volcanic eruption (El Hierro, Canary Islands)

    Science.gov (United States)

    Villasante-Marcos, Víctor; Pavón-Carrasco, Francisco Javier

    2014-12-01

    A palaeomagnetic study has been carried out in 29 cores drilled at six different sites from the volcanic products of Lomo Negro eruption (El Hierro, Canary Islands, Spain). Systematic thermal and alternating field demagnetization of the samples' natural remanent magnetization revealed a northward, stable palaeomagnetic direction similar in all the samples. Rock magnetic experiments indicate that this palaeomagnetic component is carried by a mixture of high-Ti and low-Ti titanomagnetite crystals typical of basaltic lithologies that have experienced a significant degree of oxyexsolution during subaerial cooling. The well constrained palaeomagnetic direction of Lomo Negro lavas was used to perform a palaeomagnetic dating of the volcanic event, using the SHA.DIF.14k global geomagnetic model restricted for the last 3000 yr. It can be unambiguously concluded that Lomo Negro eruption occurred well before the previously proposed date of 1793 AD, with three different age ranges being statistically possible during the last 3 ka: 115 BC-7 AD, 410-626 AD and 1499-1602 AD. The calibration of a previously published non-calibrated 14C dating suggests a XVI c. date for Lomo Negro eruption. This conclusion leaves open the possibility that the seismic crisis occurred at El Hierro in 1793 AD was related to an intrusive magmatic event that either did not reach the surface or either culminated in an unregistered submarine eruption similar to the one occurred in 2011-2012 at the southern off-shore ridge of the island.

  8. Predation upon Diadema aff. Zantillarum in barren grounds in the Canary Islands

    Directory of Open Access Journals (Sweden)

    Sabrina Clemente

    2007-12-01

    Full Text Available Experimental studies were carried out to determine the effects of predation on populations of the sea urchin Diadema aff. antillarum in barren grounds at the Canary Islands. The studied urchin populations were dominated by small to medium sized individuals (24-38 mm and were variable in space. Tethering experiments showed that predation rates on D. aff. antillarum were very low and no differences were found between sites. Predation was found to be most intense on juveniles ( 40 mm were not preyed upon whatsoever. We have experimentally demonstrated that there is an absolute predator ‘escape size’ of around 40 mm for D. aff. antillarum individuals in barren grounds. Predation rates obtained for juveniles show that a sufficient number may escape predation and sustain the adult population, maintaining the urchin barren habitat. Recruitment and topographic complexity, rather than predation, seem to determine the structure of urchin populations in barren grounds. We conclude that predation in fished barren grounds of the Canarian Archipelago is not of sufficient magnitude to substantially alter dense urchin populations and cause community-level effects.

  9. Agrotourism, sustainable tourism and Ultraperipheral areas: The Case of Canary Islands

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    Parra López, Eduardo

    2006-01-01

    Full Text Available Ultraperipheral regions share certain common characteristics, such as their remoteness from the major supplying centres, their scanty resources, their island status or isolated location and consequent fragmentation of markets. Over the past decades, there has been an increasing awareness of the impact of ultraperiphericity on the development of a number of regions and islands. The concept of “ultraperiphericity” includes specific geographic circumstances that influence the development and specialisation of economies, competitiveness and business strategies. Agrotourism is playing an ever increasingly important role in the diversification of the agriculture, farming and tourism sectors into the Ultraperipheral Regions. Therefore, particular attention should be paid to the economic development of rural areas in Ultraperipheral Areas and to the reappraisal of agriculture, which is closely connected with tourism. Agrotourism is essential to diversify, transform and improve the competitiveness and quality of farms. This paper examines the impact of Agrotourism as an alternative to sun and sand tourism, resulting in the growth of family income, in rural development and, in short, in new approaches to the tourism industry. A further goal of the paper is to develop a strategic analysis of Agrotourism, studying both supply and demand in the Canary Islands

  10. Depth profile of 236U/238U in soil samples in La Palma, Canary Islands

    Science.gov (United States)

    Srncik, M.; Steier, P.; Wallner, G.

    2011-01-01

    The vertical distribution of the 236U/238U isotopic ratio was investigated in soil samples from three different locations on La Palma (one of the seven Canary Islands, Spain). Additionally the 240Pu/239Pu atomic ratio, as it is a well establish tool for the source identification, was determined. The radiochemical procedure consisted of a U separation step by extraction chromatography using UTEVA® Resin (Eichrom Technologies, Inc.). Afterwards Pu was separated from Th and Np by anion exchange using Dowex 1x2 (Dow Chemical Co.). Furthermore a new chemical procedure with tandem columns to separate Pu and U from the matrix was tested. For the determination of the uranium and plutonium isotopes by alpha spectrometry thin sources were prepared by microprecipitation techniques. Additionally these fractions separated from the soil samples were measured by Accelerator Mass Spectrometry (AMS) to get information on the isotopic ratios 236U/238U, 240Pu/239Pu and 236U/239Pu, respectively. The 236U concentrations [atoms/g] in each surface layer (∼2 cm) were surprisingly high compared to deeper layers where values around two orders of magnitude smaller were found. Since the isotopic ratio 240Pu/239Pu indicated a global fallout signature we assume the same origin as the probable source for 236U. Our measured 236U/239Pu value of around 0.2 is within the expected range for this contamination source. PMID:21481502

  11. THE CASE OF THE SINDHI TRADERS IN THE CANARY ISLANDS: TRANSNATIONAL RELATIONS AND ECONOMIC ACTIVITY

    Directory of Open Access Journals (Sweden)

    Ana María López Sala

    2010-12-01

    Full Text Available This article describes and analyses the presence and trading activities of the Sindhi community in the Canary Islands. This group is one of the oldest Asian diasporas in Spain, and is characterised by its hectic trading activity and, particularly, by the fact that it maintains a network of transnational contacts that shows that the community is established in over 100 countries. The starting point of the analysis is the historical, geographic and cultural context that favoured the exodus and arrival of this community to these islands. As other authors have mentioned in studies on transnationalism, and as these authors highlight very clearly with the group examined in this article, relations with members of the same community residing in other countries become forms of capital that provide information and communication on business opportunities and strategies in local enclaves, such as the loaning of capital and training opportunities in commercial activities and specific newly-created businesses that are adapted to certain geographic areas. The Sindhis are a community that, while it has remained faithful to its traditions and is relatively secretive, since the 1950s and with the rise of tourism, it has diversified in its areas of business and its establishment in the territory.

  12. Mesoscale structures viewed by SAR and AVHRR near the Canary islands

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    E. D. Barton

    2001-07-01

    Full Text Available Comparison of Synthetic Aperture Radar and Advanced Very High Resolution Radiometry images of sea surface backscatter and temperature during the peak of the summer Trade winds reveals many aspects of the regional oceanography of the Canary Islands. A strong correspondence occurs between the SAR and AVHRR signals. The generally uniform wind field is perturbed as it flows past the islands producing regions of calm immediately downstream. These are bounded by lines of strong horizontal wind shear that coincide with temperature fronts between warmer lee waters and the cooler surrounding ocean. Weaker winds prevail up to 50 km downstream while enhanced wind speed on the boundaries of the lee can extend more than 150 km. Lee waves are excited in the atmospheric inversion layer where the wind passes over abrupt island topography. Quantitative estimates of wind speed made with the CMOD4 algorithm are unreliable in the downstream region because wind direction is variable and unknown and because spatial gradients in air-sea temperature difference affect atmospheric boundary layer stability. A large anticyclone south of Tenerife strongly influenced the estimated wind speed probably because higher ocean temperatures in its centre caused atmospheric instability and increased radar backscatter. The temperature fronts marking boundaries of the upwelling filament and strong eddies observed in AVHRR appear as lines of current shear in the SAR images.

  13. When canary primes yellow: effects of semantic memory on overt attention.

    Science.gov (United States)

    Léger, Laure; Chauvet, Elodie

    2015-02-01

    This study explored how overt attention is influenced by the colour that is primed when a target word is read during a lexical visual search task. Prior studies have shown that attention can be influenced by conceptual or perceptual overlap between a target word and distractor pictures: attention is attracted to pictures that have the same form (rope--snake) or colour (green--frog) as the spoken target word or is drawn to an object from the same category as the spoken target word (trumpet--piano). The hypothesis for this study was that attention should be attracted to words displayed in the colour that is primed by reading a target word (for example, yellow for canary). An experiment was conducted in which participants' eye movements were recorded whilst they completed a lexical visual search task. The primary finding was that participants' eye movements were mainly directed towards words displayed in the colour primed by reading the target word, even though this colour was not relevant to completing the visual search task. This result is discussed in terms of top-down guidance of overt attention in visual search for words.

  14. Canary tomato export prices: comparison and relationships between daily seasonal patterns

    Directory of Open Access Journals (Sweden)

    G. Martin-Rodriguez

    2013-10-01

    Full Text Available Statistical procedures are proposed to describe, compare and forecast the behaviour of seasonal variations in two daily price series of Canary tomato exported to German and British markets, respectively, over the last decade. These seasonal patterns are pseudo-periodic as the length of the seasonal period changes frequently in dependence of market conditions. Seasonal effect at a day in the harvesting period is defined as a spline function of the proportion of the length of such a period elapsed up to such a day. Then, seasonal patterns for the two series are compared in terms of the area between the corresponding spline functions. The ability of these models to capture the dynamic process of change in the seasonal pattern is useful to forecasting purpose. Furthermore, an analytical tool is also proposed to obtain forecasts of the seasonal pattern in one of these two series from the forecasts of the seasonal pattern in the other one. These procedures are useful for farmers in developing strategies related to the seasonal distribution of tomato production exported to each market.

  15. Fish associated with fish aggregation devices off the Canary Islands (Central-East Atlantic

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    J. J. Castro

    1999-12-01

    Full Text Available Sixteen fish aggregation devices (FADs were deployed in 50 to 500 m deep of water in the Canary Islands. Species composition and abundance were determined by visual census carried out by divers on 55 occasions from April to October 1995 and from August 1996 to May 1997. A total of 15 species representing nine families of fish were observed. Pseudocaranx dentex (Bloch and Schneider, 1810, Seriola spp. and Naucrates ductor (Linnaeus, 1758 were the most abundant species. The number of species associated with FADs increased with immersion time, but fish biomass did not increase. The maximum number of fish species registered exactly under the FADs at any one time was five. The average estimated biomass was 9.47 Kg per FAD (SD= 25.2. However, when only baitfish were taken into account, the mean aggregated fish biomass was 3.20 Kg (SD= 4.32. The estimated biomass was higher when Coryphaena spp. was present, increasing to 53.9 Kg per FAD (SD=53.6. A significantly lower fish biomass and number of species was observed in FADs deployed in shallower waters (50-100 m depth.

  16. Volcano monitoring with a multiparametric station placed inside a subhorizontal gallery in Tenerife (Canary Islands)

    Science.gov (United States)

    Torres-González, Pedro; Moure-García, David; Luengo-Oroz, Natividad; Jiménez-Mejías, María; Jiménez-Abizanda, Ana Isabel; García-Fraga, Jose Manuel; Soler-Javaloyes, Vicente; Domínguez Cerdeña, Itahiza

    2017-04-01

    Measuring gaseous emissions from a volcano is one of the main tasks in volcano monitoring. These emissions can occur inside an active crater as fumaroles or plumes or along the whole volcanic area as diffuse emissions through porous soils or using preferential paths like dikes, faults or fractures. H2O, CO2, SO2 and H2S are the main species released by volcanoes. Among them, CO2 has received special attention in the last years. It has been used as an unrest and/or eruption early warning signal due to his low magma solubility and easily measurement. In the Canary Islands (oceanic volcanic islands) during the last century hundreds of galleries, subhorizontal drillings with lengths from few meters to kilometers and a 2x2 meters mean section, have been drilled to obtain groundwater. In the island of Tenerife there are about 1200. These infrastructures can cut across some preferential rising paths like dikes or fractures, so they turn to be optimum places to measure volcanic gas emissions. In addition, atmospheric parameters influence significantly decreases inside the galleries. In this work, we present data analysis from a three years registration period of a station placed at 1600 meters from the entrance of a gallery in Tenerife. This station measures several parameters like ambient and soil temperature and CO2 and Radon air concentrations inside the gallery. We also show how outside atmospheric parameters affect the microclimate inside the gallery.

  17. Greenhouse gas measurements over a 144 km open path in the Canary Islands

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    J. S. A. Brooke

    2012-09-01

    Full Text Available A new technique for the satellite remote sensing of greenhouse gases in the atmosphere via the absorption of short-wave infrared laser signals transmitted between counter-rotating satellites in low Earth orbit has recently been proposed; this would enable the acquisition of a long-term, stable, global set of altitude-resolved concentration measurements. We present the first ground-based experimental demonstration of this new infrared-laser occultation method, in which the atmospheric absorption of CO2 near 2.1 μm was measured over a ~144 km path length between two peaks in the Canary Islands (at an altitude of ~2.4 km, using relatively low power diode lasers (~4 to 10 mW. The retrieved CO2 volume mixing ratio of 400 ppm (±15 ppm is consistent within experimental uncertainty with simultaneously recorded in situ validation measurements. We conclude that the new method has a sound basis for monitoring CO2 in the free atmosphere; other greenhouse gases such as methane, nitrous oxide and water vapour can be monitored in the same way.

  18. Comments on Uncertainty in Groundwater Governance in the Volcanic Canary Islands, Spain

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    Emilio Custodio

    2015-06-01

    Full Text Available The uncertainty associated with natural magnitudes and processes is conspicuous in water resources and groundwater evaluation. This uncertainty has an essential component and a part that can be reduced to some extent by increasing knowledge, improving monitoring coverage, continuous elaboration of data and accuracy and addressing the related economic and social aspects involved. Reducing uncertainty has a cost that may not be justified by the improvement that is obtainable, but that has to be known to make the right decisions. With this idea, this paper contributes general comments on the evaluation of groundwater resources in the semiarid Canary Islands and on some of the main sources of uncertainty, but a full treatment is not attempted, nor how to reduce it. Although the point of view is local, these comments may help to address similar situations on other islands where similar problems appear. A consequence of physical and hydrological uncertainty is that different hydrogeological and water resource studies and evaluations may yield different results. Understanding and coarsely evaluating uncertainty helps in reducing administrative instability, poor decisions that may harm groundwater property rights, the rise of complaints and the sub-optimal use of the scarce water resources available in semiarid areas. Transparency and honesty are needed, but especially a clear understanding of what numbers mean and the uncertainty around them, to act soundly and avoid conflicting and damaging rigid attitudes. However, the different situations could condition that what may be good in a place, may not always be the case in other places.

  19. Proximal caries lesion detection using the Canary Caries Detection System: an in vitro study.

    Science.gov (United States)

    Jan, Janja; Wan Bakar, Wan Zaripah; Mathews, Sapna M; Okoye, Linda O; Ehler, Benjamin R; Louden, Christopher; Amaechi, Bennett T

    2016-11-01

    This study investigated the accuracy of the Canary System (CS) to detect proximal caries lesions in vitro, and compared it with conventional methods: International Caries Detection and Assessment System (ICDAS) II and bitewing radiography (BW). Visible proximal surfaces of extracted human teeth were assessed by ICDAS-II before setting them in five manikin mouth models. Then contacting proximal surfaces in mouth models were assessed by BW and CS. Histological validation with polarized-light microscopy served as a gold standard. Pairwise comparisons were performed on area under the curve (AUC), sensitivity, and specificity of the three methods, and corrected using Bonferroni's method. Sensitivities and specificities were compared using a test of proportions and AUC values were compared using DeLong's method. The CS presented significantly higher sensitivity (0.933) than ICDAS-II (0.733, P = 0.01) and BW (0.267, P proximal lesions than ICDAS-II and BW, although without significantly higher specificity. © 2015 Wiley Publishing Asia Pty Ltd.

  20. Un modelo educativo sui géneris: las escuelas de formación pre-militar y militar en España (1912-1936. Estudio particular de lo acontecido en las Islas Canarias - a sui generis educational model: the pre-military schools and military training in Spain

    Directory of Open Access Journals (Sweden)

    Manuel Ferraz-Lorenzo

    2015-05-01

    incentive, for learning the first letters and redemption of certain stretch of military service just encouraged the lower and depressed sectors of the social ladder who would preferably intended.Key-words: Spain, Canary Islands, military schools, military training, civil society.UN MODELO EDUCATIVO SUI GÉNERIS: LAS ESCUELAS DE FORMACIÓN PRE-MILITAR Y MILITAR EN ESPAÑA (1912-1936. ESTUDIO PARTICULAR DE LO ACONTECIDO EN LAS ISLAS CANARIAS ResumenEl modelo educativo de las escuelas premilitares y militares, pese a sus específicas variaciones en el tiempo debidas a su adaptación a los gobiernos de turno y a los vigentes reglamentos legislativos, posee una característica invariable: introducir a los mozos en el ambiente del Ejército, instruyéndolos en sus prácticas tácticas, en sus dogmas católicos - salvo el período republicano - y a través del espíritu corporativo propio de la institución. En esta línea de actuación, y para ser más ampliamente aceptado por parte de la población civil, se presenta como propuesta modernizadora, educativa y regeneracionista de amplia proyección social. Sin embargo, las contrapartidas para estimular dichos estudios entre los jóvenes tuvieron pocos alicientes, pues el aprendizaje de las primeras letras y la redención de cierto tramo del servicio militar apenas incentivaba a los sectores más bajos y deprimidos de la escala social a quienes iban preferentemente destinados.Palabras clave: España, Islas Canarias, escuelas militares, formación militar, sociedad civil.UN MODELE SUI GENERIS DE L'EDUCATION: LES ECOLES PRE-MILITAIRES ET LA FORMATION MILITAIRE EN ESPAGNE (1900-1936. UNE ETUDE SPECIFIQUE DE CE QUI EST ARRIVE DANS LES ILES CANARIESRésumé Le modèle éducatif des écoles pré-militaires et militaires, en dépit de leurs variations spécifiques au fil du temps en raison de leur adaptation aux gouvernements successifs et les dispositions législatives existantes, a une caractéristique invariable: entrez les serveurs

  1. Mantle to surface degassing of carbon- and sulphur-rich alkaline magma at El Hierro, Canary Islands

    Science.gov (United States)

    Longpré, Marc-Antoine; Stix, John; Klügel, Andreas; Shimizu, Nobumichi

    2017-02-01

    Basaltic volcanoes transfer volatiles from the mantle to the surface of the Earth. The quantification of deep volatile fluxes relies heavily on estimates of the volatile content of primitive magmas, the best archive of which is provided by melt inclusions. Available data from volcanoes producing mafic alkaline lavas in a range of tectonic settings suggest high volatile fluxes, but information remains sparse, particularly for intraplate ocean islands. Here we present measurements of volatile and trace element concentrations, as well as sulphur speciation, in olivine-hosted melt inclusions and matrix glasses from quenched basanite lava balloon samples from the 2011-2012 submarine eruption at El Hierro, Canary Islands. The results reveal remarkably high concentrations of dissolved volatiles and incompatible trace elements in this magma, with ∼80 ppm Nb and up to 3420 ppm CO2, 3.0 wt.% H2O and 5080 ppm S. Reconstructed primitive CO2 contents, considering CO2/Nb systematics and possible CO2 sequestration in shrinkage bubbles, reach weight percent levels, indicating that carbon is a major constituent of Canary Island magmas at depth and that exsolution of a CO2-rich fluid begins in the mantle at pressures in excess of 1 GPa. Correlations between sulphur concentration, sulphur speciation and water content suggest strong reduction of an initially oxidised mantle magma, likely controlled by coupled H2O and S degassing. This late-stage redox change may have triggered sulphide saturation, recorded by globular sulphide inclusions in clinopyroxene and ulvöspinel. The El Hierro basanite thus had a particularly high volatile-carrying capacity and released a minimum of 1.3-2.1 Tg CO2 and 1.8-2.9 Tg S to the environment, causing substantial stress on the local submarine ecosystem. These results highlight the important contribution of alkaline ocean island volcanoes, such as the Canary Islands, to volatile fluxes from the mantle.

  2. Ground flora, small mammal and bird species diversity in miscanthus (Miscanthusxgiganteus) and reed canary-grass (Phalaris arundinacea) fields

    Energy Technology Data Exchange (ETDEWEB)

    Semere, T.; Slater, F.M. [Cardiff University, School of Biosciences, Llysdinam Field Centre, Newbridge-on-Wye, Llandrindod Wells, Powys LD1 6NB (United Kingdom)

    2007-01-15

    Wildlife monitoring of two miscanthus and two reed canary-grass fields in Herefordshire, England was carried out in 2002, 2003 and 2004 to investigate the ecological impact of perennial biomass grass crops on ground flora, small mammals and birds. Quadrats were used to record percentage ground vegetation cover within and around the periphery of each crop. Small mammals were sampled by live trapping using Longworth traps. The common bird census technique was used to monitor populations of birds. Miscanthus fields were richer in weed vegetation than reed canary-grass or arable fields. Bird use of the biomass crop fields varied depending on species. There were considerably more open-ground bird species such as skylarks (Alauda arvensis), lapwings (Vanellus vanellus) and meadow pipits (Anthus pratensis) within miscanthus than within reed canary-grass fields. There was no particular crop-type preference by the small mammal species, but rather a preference for good ground cover and little land disturbance, which was provided by both biomass crops. Ground flora, small mammals and most of the bird species (except open-ground birds) were found more abundantly within field margins and boundaries than in crop fields indicating the importance of retaining field structure when planting biomass crops. The miscanthus work relates entirely to young crops, which may be representative of part of the national crop if large areas are cultivated for rhizomes. The findings from the current project indicate that perennial biomass grass crops can provide substantially improved habitat for many forms of native wildlife, due to the low intensity of the agricultural management system and the untreated headlands. (author)

  3. Main pigmentary features and melanocortin 1 receptor (MC1R) gene polymorphisms in the population of the Canary Islands.

    Science.gov (United States)

    de-Misa, Ricardo F; Pérez-Méndez, Lina I; Hernández-Jiménez, José G; Rodríguez, María del Cristo; Vilar, María Concepción; Suárez, José; Claveríe-Martín, Félix

    2008-08-01

    Sun exposure, light skin pigmentation, and melanocortin 1 receptor (MC1R) gene variants are independent risk factors for skin cancer. The Canary Islands have a sunny and temperate climate, but data regarding the phenotypic and genotypic risk factors among the population are lacking. The main phenotypic features (skin color, hair color, eye color, and freckling) of 5116 healthy individuals are described. The genotypic findings of six MC1R gene variants (V60L, D84E, R150C, R160W, R163Q, and T314T) in 116 healthy individuals from a population-based cohort with at least three generations of Canary Islands' ancestry are evaluated. The variants were analyzed by SNaPshot. Fifty per cent of the population showed at least one phenotypic risk factor (fair skin, 34.3%; freckling, 17.4%; green or blue eyes, 16.8%; red or blonde hair, 7.8%), although brown skin (65.7%), dark eyes (83.2%), and dark hair (92.2%) prevailed. Forty-three per cent of the individuals showed at least one of the MC1R variants studied. Allelic frequencies for V60L, D84E, R150C, R160W, R163Q, and T314T were 9.1%, 1.7%, 3.0%, 0.8%, 3.0%, and 8.2%, respectively. A significant proportion of the population showed risk factors for skin cancer. The inhabitants of the Canary Islands are phenotypically and genotypically close to Mediterranean populations.

  4. Genetically depauperate in the continent but rich in oceanic islands: Cistus monspeliensis (Cistaceae in the Canary Islands.

    Directory of Open Access Journals (Sweden)

    Mario Fernández-Mazuecos

    Full Text Available BACKGROUND: Population genetic theory holds that oceanic island populations are expected to have lower levels of genetic variation than their mainland counterparts, due to founder effect after island colonization from the continent. Cistus monspeliensis (Cistaceae is distributed in both the Canary Islands and the Mediterranean region. Numerous phylogenetic results obtained in the last years allow performing further phylogeographic analyses in Cistus. METHODOLOGY/PRINCIPAL FINDINGS: We analyzed sequences from multiple plastid DNA regions in 47 populations of Cistus monspeliensis from the Canary Islands (21 populations and the Mediterranean basin (26 populations. The time-calibrated phylogeny and phylogeographic analyses yielded the following results: (1 a single, ancestral haplotype is distributed across the Mediterranean, whereas 10 haplotypes in the Canary Islands; (2 four haplotype lineages are present in the Canarian Islands; (3 multiple colonization events across the archipelago are inferred; (4 the earliest split of intraspecific lineages occurred in the Early to Middle Pleistocene (<930,000 years BP. CONCLUSIONS/SIGNIFICANCE: The contrasting pattern of cpDNA variation is best explained by genetic bottlenecks in the Mediterranean during Quaternary glaciations, while the Canarian archipelago acted as a refugium of high levels of genetic diversity. Active colonization across the Canarian islands is supported not only by the distribution of C. monspeliensis in five of the seven islands, but also by our phylogeographic reconstruction in which unrelated haplotypes are present on the same island. Widespread distribution of thermophilous habitats on every island, as those found throughout the Mediterranean, has likely been responsible for the successful colonization of C. monspeliensis, despite the absence of a long-distance dispersal mechanism. This is the first example of a plant species with higher genetic variation among oceanic island

  5. La disponibilidad de los recursos tangibles de la oferta de productos de turismo cultural de las Islas Canarias. Aplicación del Modelo Probabilístico de Rasch.

    OpenAIRE

    Isabel Montero Muradas; Juan Ramón Oreja Rodríguez

    2005-01-01

    La disponibilidad de recursos culturales tangibles condiciona la oferta de productos de turismo cultural debido a su dispersión y heterogeneidad. Se ha utilizado el modelo probabilístico de Rasch para determinar medidas unidimensionales para las Islas Canarias. Estas medidas se han comparado y ordenado. La jerarquización resultante podría utilizarse como base de negociación de las estrategias de desarrollo del turismo cultural.

  6. ESPACIOS TURÍSTICOS, ORDENACIÓN DEL TERRITORIO Y ACTITUDES POLÍTICAS, EL CASO DEL COMPLEJO HOTELERO CERCA VIEJA EN FUENCALIENTE DE LA PALMA (ISLAS CANARIAS. ESPAÑA

    Directory of Open Access Journals (Sweden)

    Carlos Santiago Martín Fernández

    2011-01-01

    Full Text Available El presente artículo describe los nexos o relaciones existentes entre tres aspectos de gran actualidad: el desarrollo inmobiliario-turístico, la ordenación del territorio y las estrategias políticas. Para ello, estudiamos un caso emblemático en Canarias: el proceso de construcción del Resort Cerca Vieja en Fuencaliente, isla de La Palma.

  7. La disponibilidad de los recursos tangibles de la oferta de productos de turismo cultural de las Islas Canarias. Aplicación del Modelo Probabilístico de Rasch.

    Directory of Open Access Journals (Sweden)

    Isabel Montero Muradas

    2005-01-01

    Full Text Available La disponibilidad de recursos culturales tangibles condiciona la oferta de productos de turismo cultural debido a su dispersión y heterogeneidad. Se ha utilizado el modelo probabilístico de Rasch para determinar medidas unidimensionales para las Islas Canarias. Estas medidas se han comparado y ordenado. La jerarquización resultante podría utilizarse como base de negociación de las estrategias de desarrollo del turismo cultural.

  8. On the occurrence of egg masses of the diamond-shaped squid Thysanoteuthis rhombus Troschel, 1857 in the subtropical eastern Atlantic (Canary Islands. A potential commercial species?

    Directory of Open Access Journals (Sweden)

    Alejandro Escanez

    2012-09-01

    Full Text Available Data on opportunistic sightings of diamond-shaped squid Thysanoteuthis rhombus egg masses in the Canary Islands (Atlantic Ocean are presented. A total of 16 egg masses of this species were recorded and photographed from 2000 to 2010 around the western islands of the archipelago (El Hierro, Tenerife and La Gomera. These data reveal the existence of an important spawning area for diamond-shaped squid around the Canary Islands, in subtropical east Atlantic waters. We provide preliminary data for the potential development of an artisanal fishery focused on this species, and a discussion on its potential impacts on the marine ecosystem.

  9. Tracing variability in the iodine isotopes and species along surface water transect from the North Sea to the Canary Islands

    DEFF Research Database (Denmark)

    He, Peng; Aldahan, Ala; Hou, Xiaolin

    2016-01-01

    A complete transect of surface water samples from the North Sea to the Canary Islands was collected during a continuous period in 2010. The samples were analyzed for total 129I and 127I isotopes and their iodide and iodate species. The results indicate a large variability in the total 129I and it...... species along the transect, whereas less change and variation are observed for the total 127I and its species. Transport of 129I from the western English Channel via Biscay Bay is the main source of 129I in the northeastern Atlantic Ocean....

  10. Debt, Labor and Coercion. The Experiences of Canary Colonization in the Estado Oriental del Uruguay (1830-1843

    Directory of Open Access Journals (Sweden)

    Florencia Thul Charbonnier

    2017-06-01

    Full Text Available This article analyzes the experiences of colonization from the Canary Islands driven by private entrepreneurs and backed by the Uruguayan State during the 1830s. This was a special type of immigration, close to indenture servitude, where individuals moving across the continents signed a contract that forced them to keep working in Uruguay until the debt they had incurred (the cost of their maritime passage was repaid. The Uruguayan State, through the police, was both the guarantor and enforcer of these contracts.

  11. A methodology for optimization of wind farm allocation under land restrictions: the case of the Canary Islands

    Science.gov (United States)

    Castaño Moraga, C. A.; Suárez Santana, E.; Sabbagh Rodríguez, I.; Nebot Medina, R.; Suárez García, S.; Rodríguez Alvarado, J.; Piernavieja Izquierdo, G.; Ruiz Alzola, J.

    2010-09-01

    Wind farms authorization and power allocations to private investors promoting wind energy projects requires some planification strategies. This issue is even more important under land restrictions, as it is the case of Canary Islands, where numerous specially protected areas are present for environmental reasons and land is a scarce resource. Aware of this limitation, the Regional Government of Canary Islands designed the requirements of a public tender to grant licences to install new wind farms trying to maximize the energy produced in terms of occupied land. In this paper, we detail the methodology developed by the Canary Islands Institute of Technology (ITC, S.A.) to support the work of the technical staff of the Regional Ministry of Industry, responsible for the evaluation of a competitive tender process for awarding power lincenses to private investors. The maximization of wind energy production per unit of area requires an exhaustive wind profile characterization. To that end, wind speed was statistically characterized by means of a Weibull probability density function, which mainly depends on two parameters: the shape parameter K, which determines the slope of the curve, and the average wind speed v , which is a scale parameter. These two parameters have been evaluated at three different heights (40,60,80 m) over the whole canarian archipelago, as well as the main wind speed direction. These parameters are available from the public data source Wind Energy Map of the Canary Islands [1]. The proposed methodology is based on the calculation of an initially defined Energy Efficiency Basic Index (EEBI), which is a performance criteria that weighs the annual energy production of a wind farm per unit of area. The calculation of this parameter considers wind conditions, windturbine characteristics, geometry of windturbine distribution in the wind farm (position within the row and column of machines), and involves four steps: Estimation of the energy produced by

  12. New data on the Tanaidacea (Crustacea: Peracarida) from the Canary Islands, with a description of a new species of Apseudopsis.

    Science.gov (United States)

    Esquete, Patricia; Ramos, Eva; Riera, Rodrigo

    2016-03-21

    Benthic samples from two harbours at El Hierro and Tenerife (Canary Islands) yielded three species of Tanaidacea. Tanais dulongii and Leptochelia savignyi are recorded for the first time in Tenerife and El Hierro, respectively. A new species of Apseudomorpha, Apseudopsis rogi, was collected in both harbours and can be differentiated from other species of the genus by the male having a cheliped merus with a distinctive, cylindrical dorso-proximal spur. This is the first species of Apseudopsis described for the Macaronesian region. A key to the Atlantic and Mediterranean species of Apseudopsis is provided.

  13. Eggshell Biliverdin and Protoporphyrin Pigments in a Songbird: Are They Derived from Erythrocytes, Blood Plasma, or the Shell Gland?

    Science.gov (United States)

    Hargitai, Rita; Boross, Nóra; Hámori, Susanne; Neuberger, Eszter; Nyiri, Zoltán

    Biliverdin and protoporphyrin pigments are deposited into the eggshell when the developing egg is in the shell gland. However, the site of synthesis of eggshell pigments is still uncertain, although it may influence the possible costs and potential functions of eggshell coloration in avian species. Eggshell pigments may be derived from red blood cells or be produced in other organs and then transferred to the shell gland, or they may be synthesized de novo in the shell gland. We studied in the canary (Serinus canaria) whether eggshell blue-green and brown pigmentations are associated with experimentally elevated anemia, female hematocrit level, immature erythrocyte percentage, and feces and plasma pigment levels during egg laying to find out the possible origin of eggshell pigments. We found no significant effects of hematocrit level or experimentally elevated anemia on intensity of eggshell blue-green and brown pigmentations; therefore, we consider it less likely that eggshell pigments are derived from erythrocytes. In addition, we found no significant associations between female feces biliverdin concentration during egg laying and intensity of eggshell blue-green pigmentation, suggesting that eggshell biliverdin may not originate from the spleen or liver. We found a negative association between plasma and feces protoporphyrin concentrations during egg laying and eggshell brown chroma. This result suggests that an increased production of protoporphyrin in the liver, which could have elevated plasma and feces protoporphyrin concentrations, could inhibit eggshell protoporphyrin pigmentation, probably through affecting enzymatic activities. We suggest that both pigments are produced de novo in the shell gland in the canary, but circulating pigment levels may influence shell gland pigment synthesis, thus connecting the physiological status of the female to eggshell coloration.

  14. Plasmodium spp.: an experimental study on vertebrate host susceptibility to avian malaria.

    Science.gov (United States)

    Dimitrov, Dimitar; Palinauskas, Vaidas; Iezhova, Tatjana A; Bernotienė, Rasa; Ilgūnas, Mikas; Bukauskaitė, Dovile; Zehtindjiev, Pavel; Ilieva, Mihaela; Shapoval, Anatoly P; Bolshakov, Casimir V; Markovets, Mikhail Yu; Bensch, Staffan; Valkiūnas, Gediminas

    2015-01-01

    The interest in experimental studies on avian malaria caused by Plasmodium species has increased recently due to the need of direct information about host-parasite interactions. Numerous important issues (host susceptibility, development of infection, the resistance and tolerance to avian malaria) can be answered using experimental infections. However, specificity of genetically different lineages of malaria parasites and their isolates is largely unknown. This study reviews recent experimental studies and offers additional data about susceptibility of birds to several widespread cytochrome b (cyt b) lineages of Plasmodium species belonging to four subgenera. We exposed two domesticated avian hosts (canaries Serinus canaria and ducklings Anas platyrhynchos) and also 16 species of common wild European birds to malaria infections by intramuscular injection of infected blood and then tested them by microscopic examination and PCR-based methods. Our study confirms former field and experimental observations about low specificity and wide host-range of Plasmodium relictum (lineages SGS1 and GRW11) and P. circumflexum (lineage TURDUS1) belonging to the subgenera Haemamoeba and Giovannolaia, respectively. However, the specificity of different lineages and isolates of the same parasite lineage differed between species of exposed hosts. Several tested Novyella lineages were species specific, with a few cases of successful development in experimentally exposed birds. The majority of reported cases of mortality and high parasitaemia were observed during parasite co-infections. Canaries were susceptible mainly for the species of Haemamoeba and Giovannolaia, but were refractory to the majority of Novyella isolates. Ducklings were susceptible to three malaria infections (SGS1, TURDUS1 and COLL4), but parasitaemia was light (<0.01%) and transient in all exposed birds. This study provides novel information about susceptibility of avian hosts to a wide array of malaria parasite

  15. Transient changes in bacterioplankton communities induced by the submarine volcanic eruption of El Hierro (Canary Islands).

    Science.gov (United States)

    Ferrera, Isabel; Arístegui, Javier; González, José M; Montero, María F; Fraile-Nuez, Eugenio; Gasol, Josep M

    2015-01-01

    The submarine volcanic eruption occurring near El Hierro (Canary Islands) in October 2011 provided a unique opportunity to determine the effects of such events on the microbial populations of the surrounding waters. The birth of a new underwater volcano produced a large plume of vent material detectable from space that led to abrupt changes in the physical-chemical properties of the water column. We combined flow cytometry and 454-pyrosequencing of 16S rRNA gene amplicons (V1-V3 regions for Bacteria and V3-V5 for Archaea) to monitor the area around the volcano through the eruptive and post-eruptive phases (November 2011 to April 2012). Flow cytometric analyses revealed higher abundance and relative activity (expressed as a percentage of high-nucleic acid content cells) of heterotrophic prokaryotes during the eruptive process as compared to post-eruptive stages. Changes observed in populations detectable by flow cytometry were more evident at depths closer to the volcano (~70-200 m), coinciding also with oxygen depletion. Alpha-diversity analyses revealed that species richness (Chao1 index) decreased during the eruptive phase; however, no dramatic changes in community composition were observed. The most abundant taxa during the eruptive phase were similar to those in the post-eruptive stages and to those typically prevalent in oceanic bacterioplankton communities (i.e. the alphaproteobacterial SAR11 group, the Flavobacteriia class of the Bacteroidetes and certain groups of Gammaproteobacteria). Yet, although at low abundance, we also detected the presence of taxa not typically found in bacterioplankton communities such as the Epsilonproteobacteria and members of the candidate division ZB3, particularly during the eruptive stage. These groups are often associated with deep-sea hydrothermal vents or sulfur-rich springs. Both cytometric and sequence analyses showed that once the eruption ceased, evidences of the volcano-induced changes were no longer observed.

  16. Melt inclusion study of the most recent basanites from El Hierro and Lanzarote, Canary Islands

    Science.gov (United States)

    Gomez-Ulla, Alejandra; Sigmarsson, Olgeir; Huertas, Maria Jose; Ancochea, Eumenio

    2015-04-01

    The latest eruptions of both Lanzarote (one of the oldest and easternmost of the Canary Island archipelago) and El Hierro (the youngest and westernmost) produced basanite lavas. Major, volatile and trace element concentrations of melt inclusion (MI) hosted in olivine for both eruptions have been analysed. The basanites display primitive mantle normalized trace element spectra suggesting a magma source largely composed of recycled oceanic crust. In addition, beneath Lanzarote an interaction with a carbonatitic fluid phase or metasome would explain eccentric Ba/U and other trace element ratios. Contribution of carbonatitic component would readily account for extremely volatile-rich (Cl, F, S) MI from Lanzarote (Cl=1577-2500 ppm) whereas the maximum for El Hierro is 1080 ppm. The submarine character of the 2011-12 eruption off El Hierro appears to have affected the degassing behavior, whereas estimated sulfur emission to the atmosphere during the historical Lanzarote eruptions are amongst the highest observed so far. An estimated magma volume (VDRE) of 0.02 km3 yields atmospheric mass loading of 0.2 Mt SO2 from the 1824 Lanzarote eruption. Scaling the volume of the 1824 Lanzarote eruption to that of the previous Timanfaya eruption (1730-6; 5 km3) results in estimated 12 Mt SO2, an atmospheric mass loading only outnumbered by the historical Laki and Eldgjá eruptions in Iceland. The significantly greater volatile budget of basanites from Lanzarote compared to El Hierro is thus controlled by more fertile source composition closer to the African continent.

  17. Multiparametric statistical investigation of seismicity occurred at El Hierro (Canary Islands) from 2011 to 2014

    Science.gov (United States)

    Telesca, Luciano; Lovallo, Michele; Lopez, Carmen; Marti Molist, Joan

    2016-03-01

    A detailed statistical investigation of the seismicity occurred at El Hierro volcano (Canary Islands) from 2011 to 2014 has been performed by analysing the time variation of four parameters: the Gutenberg-Richter b-value, the local coefficient of variation, the scaling exponent of the magnitude distribution and the main periodicity of the earthquake sequence calculated by using the Schuster's test. These four parameters are good descriptors of the time and magnitude distributions of the seismic sequence, and their variation indicate dynamical changes in the volcanic system. These variations can be attributed to the causes and types of seismicity, thus allowing to distinguish between different host-rock fracturing processes caused by intrusions of magma at different depths and overpressures. The statistical patterns observed among the studied unrest episodes and between them and the eruptive episode of 2011-2012 indicate that the response of the host rock to the deformation imposed by magma intrusion did not differ significantly from one episode to the other, thus suggesting that no significant local stress changes induced by magma intrusion occurred when comparing between all them. Therefore, despite the studied unrest episodes were caused by intrusions of magma at different depths and locations below El Hierro island, the mechanical response of the lithosphere was similar in all cases. This suggests that the reason why the first unrest culminated in an eruption while the other did not, may be related to the role of the regional/local tectonics acting at that moment, rather than to the forceful of magma intrusion.

  18. Transient changes in bacterioplankton communities induced by the submarine volcanic eruption of El Hierro (Canary Islands.

    Directory of Open Access Journals (Sweden)

    Isabel Ferrera

    Full Text Available The submarine volcanic eruption occurring near El Hierro (Canary Islands in October 2011 provided a unique opportunity to determine the effects of such events on the microbial populations of the surrounding waters. The birth of a new underwater volcano produced a large plume of vent material detectable from space that led to abrupt changes in the physical-chemical properties of the water column. We combined flow cytometry and 454-pyrosequencing of 16S rRNA gene amplicons (V1-V3 regions for Bacteria and V3-V5 for Archaea to monitor the area around the volcano through the eruptive and post-eruptive phases (November 2011 to April 2012. Flow cytometric analyses revealed higher abundance and relative activity (expressed as a percentage of high-nucleic acid content cells of heterotrophic prokaryotes during the eruptive process as compared to post-eruptive stages. Changes observed in populations detectable by flow cytometry were more evident at depths closer to the volcano (~70-200 m, coinciding also with oxygen depletion. Alpha-diversity analyses revealed that species richness (Chao1 index decreased during the eruptive phase; however, no dramatic changes in community composition were observed. The most abundant taxa during the eruptive phase were similar to those in the post-eruptive stages and to those typically prevalent in oceanic bacterioplankton communities (i.e. the alphaproteobacterial SAR11 group, the Flavobacteriia class of the Bacteroidetes and certain groups of Gammaproteobacteria. Yet, although at low abundance, we also detected the presence of taxa not typically found in bacterioplankton communities such as the Epsilonproteobacteria and members of the candidate division ZB3, particularly during the eruptive stage. These groups are often associated with deep-sea hydrothermal vents or sulfur-rich springs. Both cytometric and sequence analyses showed that once the eruption ceased, evidences of the volcano-induced changes were no longer

  19. Photosynthetic response and zonation of three species of Gelidiales from Tenerife, Canary Islands

    Directory of Open Access Journals (Sweden)

    Domíguez-Álvarez, S.

    2011-06-01

    Full Text Available Three species of Gelidiales (Gelidium arbuscula, Gelidium canariense and Pterocladiella capillacea (Rhodophyta were selected due to their abundance in the marine lower intertidal of the north coast of the island of Tenerife (Canary Islands, to assess, using PAM fluorescence, the importance of irradiance and exposure to air on vertical distribution. We compared tolerance to emersion by air-drying fronds under simulated emersion, and results suggest that recovery of photosynthesis after emersion plays a major role in the vertical distribution of these three species. Morphological traits such as clumped fronds explain the higher tolerances, and reduced water loss of the species upper on the shore. Local differences between sites may be related to slight differences in the light regime related to topography.

    Se han seleccionado tres especies de Gelidiales (Gelidium arbuscula, Gelidium canariense y Pterocladiella capillacea que son abundantes en los niveles inferiores del intermareal de la costa N de Tenerife para establecer, utilizando fluorescencia tipo PAM, la importancia de la cantidad de luz y la exposición al aire en su zonación vertical. Se ha comparado la tolerancia a la emersión en frondes expuestas al aire, y los resultados sugieren que la capacidad de recuperación de la fotosíntesis tras la emersión tiene un papel fundamental en la explicación de la posición vertical de estas tres especies. Además, características morfológicas como el apelotonamiento de las frondes pueden coadyuvar a la mayor tolerancia, al reducir la pérdida de agua en emersión en las especies de niveles más altos. Las variaciones entre sitios se pueden deber a desigualdades locales en la cantidad de luz provocadas por diferencias topográficas.

  20. Distribution and genetic variation of hymenolepidid cestodes in murid rodents on the Canary Islands (Spain

    Directory of Open Access Journals (Sweden)

    Feliu Carlos

    2011-09-01

    Full Text Available Abstract Background In the Canary Islands there are no previous data about tapeworms (Cestoda of rodents. In order to identify the hymenolepidid species present in these hosts, a survey of 1,017 murine (349 Rattus rattus, 13 Rattus norvegicus and 655 Mus musculus domesticus was carried out in the whole Archipelago. Molecular studies based on nuclear ITS1 and mitochondrial COI loci were performed to confirm the identifications and to analyse the levels of genetic variation and differentiation. Results Three species of hymenolepidids were identified: Hymenolepis diminuta, Rodentolepis microstoma and Rodentolepis fraterna. Hymenolepis diminuta (in rats and R. microstoma (in mice showed a widespread distribution in the Archipelago, and R. fraterna was the least spread species, appearing only on five of the islands. The hymenolepidids found on Fuerteventura, Lanzarote and La Graciosa were restricted to one area. The COI network of H. diminuta showed that the haplotypes from Lanzarote and Fuerteventura are the most distant with respect to the other islands, but clearly related among them. Conclusions Founder effects and biotic and abiotic factors could have played important role in the presence/absence of the hymenolepidid species in determined locations. The haplotypes from the eastern islands (Fuerteventura and Lanzarote seem to have shared an ancestral haplotype very distant from the most frequent one that was found in the rest of the islands. Two colonization events or a single event with subsequent isolation and reduced gene flow between western-central and eastern islands, have taken place in the Archipelago. The three tapeworms detected are zoonotic species, and their presence among rodents from this Archipelago suggests a potential health risk to human via environmental contamination in high risk areas. However, the relatively low prevalence of infestations detected and the focal distribution of some of these species on certain islands reduce

  1. Estimating building exposure and impact to volcanic hazards in Icod de los Vinos, Tenerife (Canary Islands)

    Science.gov (United States)

    Marti, J.; Spence, R.; Calogero, E.; Ordoñez, A.; Felpeto, A.; Baxter, P.

    2008-12-01

    Principal and subsidiary building structure characteristics and their distribution have been inventoried in Icod, Tenerife (Canary Islands) and used to evaluate the vulnerability of individual buildings to three volcanic hazards: tephra fallout, volcanogenic earthquakes and pyroclastic flows. The procedures described in this paper represent a methodological framework for a comprehensive survey of all the buildings at risk in the area around the Teide volcano in Tenerife. Such a methodology would need to be implemented for the completion of a comprehensive risk assessment for the populations under threat of explosive eruptions in this area. The information presented in the paper is a sample of the necessary data required for the impact estimation and risk assessment exercises that would need to be carried out by emergency managers, local authorities and those responsible for recovery and repair in the event of a volcanic eruption. The data shows there are micro variations in building stock characteristics that would influence the likely impact of an eruption in the area. As an example of the use of this methodology for vulnerability assessment, we have applied a deterministic simulation model of a volcanic eruption from Teide volcano and its associated ash fallout which, when combined with the vulnerability data collected, allows us to obtain the vulnerability map of the studied area. This map is obtained by performing spatial analysis with a Geographical Information System (GIS). This vulnerability analysis is included in the framework of an automatic information system specifically developed for hazard assessment and risk management on Tenerife, but which can be also applied to other volcanic areas. The work presented is part of the EU-funded EXPLORIS project (Explosive Eruption Risk and Decision Support for EU Populations Threatened by Volcanoes, EVR1-2001-00047).

  2. Using two light-pollution models to investigate artificial sky radiances at Canary Islands observatories

    Science.gov (United States)

    Aubé, M.; Kocifaj, M.

    2012-05-01

    Astronomical observations are increasingly limited by light pollution, which is a product of the over-illumination of the night sky. To predict both the angular distribution of scattered light and the ground-reaching radiative fluxes, a set of models has been introduced in recent decades. Two distinct numerical tools, MSNsRAu and ILLUMINA, are compared in this paper, with the aim of identifying their strengths and weaknesses. The numerical experiment comprises the simulation of spectral radiances in the region of the Canary Islands. In particular, the light fields near the Roque de los Muchachos and Teide observatories are computed under various turbidity conditions. It is shown that ILLUMINA has enhanced accuracy at low elevation angles. However, ILLUMINA is time-consuming because of the two scattering orders incorporated into the calculation scheme. Under low-turbidity conditions and for zenith angles smaller than 70° the two models agree well, and thus can be successfully applied to typical cloudless situations at the majority of observatories. MSNsRAu is well optimized for large-scale simulations. In particular, the grid size is adapted dynamically depending on the distance between a light source and a hypothetical observer. This enables rapid numerical modelling for large territories. MSNsRAu is also well suited for the mass modelling of night-sky radiances after ground-based light sources are hypothetically changed. This enables an optimum design of public lighting systems and a time-efficient evaluation of the optical effects related to different lamp spectra or different lamp distributions. ILLUMINA provides two diagnostic geographical maps to help local authorities concerned about light-pollution control. The first map allows the identification of the relative contribution of each ground element to the observed sky radiance at a given viewing angle, while the second map gives the sensitivity, basically saying how each ground element contributes per lumen

  3. Interannual variations of soil organic carbon fractions in unmanaged volcanic soils (Canary Islands, Spain).

    Science.gov (United States)

    Armas-Herrera, Cecilia María; Mora, Juan Luis; Arbelo, Carmen Dolores; Rodríguez-Rodríguez, Antonio

    2012-10-01

    The stability over time of the organic C stocked in soils under undisturbed ecosystems is poorly studied, despite being suitable for detecting changes related to climate fluctuations and global warming. Volcanic soils often show high organic C contents due to the stabilization of organic matter by short-range ordered minerals or Al-humus complexes. We investigated the dynamics of different organic C fractions in volcanic soils of protected natural ecosystems of the Canary Islands (Spain) to evaluate the stability of their C pools. The study was carried out in 10 plots, including both undisturbed and formerly disturbed ecosystems, over two annual periods. C inputs to (litterfall) and outputs from (respiration) the soil, root C stocks (0-30 cm), soil organic C (SOC) fractions belonging to C pools with different degrees of biogeochemical stability -total oxidisable C (TOC), microbial biomass C (MBC), water soluble C (WSC), hot-water extractable C (HWC), humic C (HSC), - and total soil N (TN) (at 0-15 and 15-30 cm) were measured seasonally.A statistically significant interannual increase in CO(2) emissions and a decrease in the SOC, mainly at the expense of the most labile organic forms, were observed, while the root C stocks and litterfall inputs remained relatively constant over the study period. The observed changes may reflect an initial increase in SOC resulting from low soil respiration rates due to drought during the first year of study. The soils of nearly mature ecosystems were more apparently affected by C losses, while those undergoing the process of active natural regeneration exhibited disguised C loss because of the C sequestration trend that is characteristic of progressive ecological succession.

  4. Blood Dendritic Cells: Canary in the Coal Mine to Predict Chronic Inflammatory Disease?

    Directory of Open Access Journals (Sweden)

    Brodie eMiles

    2014-01-01

    Full Text Available The majority of risk factors for chronic inflammatory diseases are unknown. This makes personalized medicine for assessment, prognosis, and choice of therapy very difficult. It is becoming increasingly clear, however, that low-grade subclinical infections may be an underlying cause of many chronic inflammatory diseases and thus may contribute to secondary outcomes (e.g. cancer. Many diseases are now categorized as inflammatory-mediated diseases that stem from a dysregulation in host immunity. There is a growing need to study the links between low-grade infections, the immune responses they elicit, and how this impacts overall health. One such link explored in detail here is the extreme sensitivity of myeloid dendritic cells (mDC in peripheral blood to chronic low-grade infections and the role that these mDCs play in arbitrating the resulting immune responses. We find that emerging evidence supports a role for pathogen-induced mDCs in chronic inflammation leading to increased risk of secondary clinical disease. The mDCs that are elevated in the blood as a result of low-grade bacteremia often do not trigger a productive immune response, but can disseminate the pathogen throughout the host. This aberrant trafficking of mDCs can accelerate systemic inflammatory disease progression. Conversely, restoration of DC homeostasis may aid in pathogen elimination and minimize dissemination. Thus it would seem prudent when assessing chronic inflammatory disease risk to consider blood mDC numbers, and the microbial content (microbiome and activation state of these mDCs. These may provide important clues (the canary in the coal mine of high inflammatory disease risk. This will facilitate development of novel immunotherapies to eliminate such smoldering infections in atherosclerosis, cancer, rheumatoid arthritis, and pre-eclampsia.

  5. Distribution and genetic variation of hymenolepidid cestodes in murid rodents on the Canary Islands (Spain)

    Science.gov (United States)

    2011-01-01

    Background In the Canary Islands there are no previous data about tapeworms (Cestoda) of rodents. In order to identify the hymenolepidid species present in these hosts, a survey of 1,017 murine (349 Rattus rattus, 13 Rattus norvegicus and 655 Mus musculus domesticus) was carried out in the whole Archipelago. Molecular studies based on nuclear ITS1 and mitochondrial COI loci were performed to confirm the identifications and to analyse the levels of genetic variation and differentiation. Results Three species of hymenolepidids were identified: Hymenolepis diminuta, Rodentolepis microstoma and Rodentolepis fraterna. Hymenolepis diminuta (in rats) and R. microstoma (in mice) showed a widespread distribution in the Archipelago, and R. fraterna was the least spread species, appearing only on five of the islands. The hymenolepidids found on Fuerteventura, Lanzarote and La Graciosa were restricted to one area. The COI network of H. diminuta showed that the haplotypes from Lanzarote and Fuerteventura are the most distant with respect to the other islands, but clearly related among them. Conclusions Founder effects and biotic and abiotic factors could have played important role in the presence/absence of the hymenolepidid species in determined locations. The haplotypes from the eastern islands (Fuerteventura and Lanzarote) seem to have shared an ancestral haplotype very distant from the most frequent one that was found in the rest of the islands. Two colonization events or a single event with subsequent isolation and reduced gene flow between western-central and eastern islands, have taken place in the Archipelago. The three tapeworms detected are zoonotic species, and their presence among rodents from this Archipelago suggests a potential health risk to human via environmental contamination in high risk areas. However, the relatively low prevalence of infestations detected and the focal distribution of some of these species on certain islands reduce the general transmission

  6. Valoración económica de las características espaciales de las casas rurales en Gran Canaria

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    Hernández Guerra, Juan María

    2009-01-01

    Full Text Available RESUMEN Este trabajo analiza la influencia de algunas características espaciales sobre los precios por noche de casas rurales en Gran Canaria. Se estimó para ello un modelo de precios hedónicos que incluye en su formulación ciertos atributos espaciales de la casa, tales como el número de vecinos en un radio determinado. Estas variables fueron calculadas por medio de un Sistema de Información Geográfica (SIG. También se analizaron otros factores incluidos tradicionalmente en estos modelos, como las características estructurales de la casa y la distancia a lugares de interés. Se aplicaron técnicas de econometría espacial para contrastar la existencia de autocorrelación espacial en los precios. En general, los resultados indican que el alejamiento de la casa incrementa el precio de alquiler. Estos resultados pueden ser útiles en el debate entre los gestores políticos y también la población local sobre el desarrollo futuro de esta incipiente industria. ABSTRACT This paper analyses the influence of some spatial characteristics in the rental prices of rural houses in Gran Canaria. To do this, a hedonic prices model was estimated, which includes certain spatial attributes of the house in its formulation, such as the land use and the number of neighbours in a given radius around the house. The variables were estimated by means of a Geographic Information System (GIS. Other factors traditionally included in hedonic models are also analysed, such as the structural characteristics of the house and distance to some amenities. Spatial econometrics was applied to check the spatial autocorrelation of rental prices. In general, results point out that remoteness increases the rental price of rural houses. These findings may be useful in the debate among policy makers and also local population on the future development of the nowadays incipient industry.

  7. Caracterización del ambiente atmosférico en Las Palmas de Gran Canaria y Santa Cruz de Tenerife. 2000 a 2004

    Directory of Open Access Journals (Sweden)

    Elena López Villarrubia

    2008-01-01

    Full Text Available Fundamento: El carácter insular de las ciudades de Las Palmas de Gran Canaria y Santa Cruz de Tenerife, su meteorología y la proximidad del continente africano que favorece la llegada de material particulado de origen natural sobre las islas, determinan unas especificidades en su calidad del aire. El objetivo de este artículo es la caracterización de la contaminación atmosférica durante los años 2000 a 2004 como indicador de exposición de los habitantes de estas dos ciudades. Métodos: Se elaboraron los siguientes indicadores de contaminación: promedios de 24 horas de PM10, PM2,5, NO2, SO2 y O3; máximo de las 17 medias móviles octohorarias diarias de O3 y CO; máximo horario diario de SO2, NO2, O3, CO, PM10 y PM2,5. También se calcularon los niveles de la moda gruesa de partículas, como la diferencia entre los valores de PM10 y PM2,5 (PM10-2,5. Se identificaron episodios de intrusión africana. Resultados: En Sta Cruz de TF los promedios de SO2 (14ug/m3N y de O3 (44,4 ug/m3N fueron superiores respecto a los de Las Palmas de GC (8 y 28,3 ug/m3N. Los promedios de NO2 en Las Palmas de GC: 45,8 ug/m3N fueron superiores a los de Sta. Cruz de TF: 30,3 ug/m3N. Debido a las intrusiones africanas, algunos días superaron los 600 ug/m3 de PM10 y los 200 de PM2.5 en ambas ciudades. Conclusiones: Se identifica un patrón de calidad del aire con episodios de polvo mineral africano que en superficie afecta a todas las fracciones granulométricas, una estacionalidad diferente a las ciudades europeas respecto al ozono, así como un patrón de contaminación urbano-industrial en Sta. Cruz de Tf y netamente urbano en Las Palmas de GC. Se hace necesario tener en cuenta estos resultados para analizar su posible impacto sobre la salud de los ciudadanos de las Islas Canarias y establecer sistemas adecuados de vigilancia.

  8. Análisis e impacto de los touroperadores y las agencias de viaje en el transporte turístico: nuevas tendencias en Canarias

    Directory of Open Access Journals (Sweden)

    Parra López, Eduardo

    2003-01-01

    Full Text Available The international tourism transport sector is facing profound changes in its structure, particularly where tour operators and travel agencies are concerned. New reservation distribution systems (GDS and CRS and interactive television systems are setting new guidelines for the sector. The worldwide platform of the Internet has created a new context, which is rapidly emerging and becoming ever more dynamic. For this reason, travel organisations should explore the proliferation of management tools that facilitate the establishment of new competitive strategies and positioning in an increasingly volatile area, with new products and forms in both demand and supply. This exploratory study identifies and interprets several questions based on a survey of 82 hotel and travel agency managers in the Canary Islands, who express their views about current and future developments in the sector

  9. An Institutional Approach to Bordering in Islands: The Canary Islands on the African-European Migration Routes

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    Dirk Godenau

    2012-05-01

    Full Text Available Islands play a significant role in international irregular maritime migration. Frequently they are part of maritime interstitial spaces between states, and their location, combined with institutional membership, makes them part of international migration routes and subject to border management strategies. In this paper borders are analysed as social institutions used for regulating relative permeability through rules of entry and exit for persons, goods and capital. Borders institutionalize territoriality and are politically implemented by states. They are selective, also in migration, and irregular border transit is not always indicative of an inability to control. The Canary Islands are used as an illustrative example of how border management at the southern edge of the European Union has evolved towards more coercive deterrence and tighter surveillance. The Canary Islands experienced irregular maritime immigration from the west African coasts during the first decade of the 21st century and most of these migrants intended to use the islands as transit space towards the European continent. Increasing surveillance in countries of origin, enforcement of border controls and stricter return policies were used to stop flows. The so-called “cayuco crisis” in 2006 induced institutional change in border management and forced the active involvement of the EU through FRONTEX.

  10. European Regional activation towards Brussels: From the heart to the Ultra-periphery of Europe. Walloon and Canary Islands’ strategies

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    Jorge Tuñón

    2008-06-01

    Full Text Available Wallonia and the Canary Islands are both regions with legislative capacities within the European Union (EU. They have traditionally shared serious socio-economic deficits. Therefore, while a new European Regional policy was being designed, they both built regional strategies in order to extract as much as they can from the EU. How far are these Sub-State activations towards Brussels linked to regional gains (outputs from the EU? How different are both mobilisations? How can the higher degree of success of the Canary Islands be explained, taking into account that the Archipelago is far away from the heart of Europe and Wallonia is within it? The research, based on a qualitative analysis method, will be carried out through findings about the regional mechanisms developed to influence the European institutions: the participation (direct and non direct within the Council of Ministers, the Committee of the Regions, the regional interaction with the European Commission, the establishment of representative bodies in Brussels and the participation within interregional associations.

  11. Detection of Coxiella burnetii DNA in Peridomestic and Wild Animals and Ticks in an Endemic Region (Canary Islands, Spain).

    Science.gov (United States)

    Bolaños-Rivero, Margarita; Carranza-Rodríguez, Cristina; Rodríguez, Noe F; Gutiérrez, Carlos; Pérez-Arellano, José-Luis

    2017-09-01

    Coxiella burnetii, the etiological agent of human Q fever, can infect mammals, birds, and arthropods. The Canary Islands (Spain) are considered an endemic territory, with a high prevalence in both humans and livestock. Nonetheless, there is no epidemiological information about the wild and peridomestic cycles of C. burnetii. Tissue samples from rodents on farms (100) and wild rabbits (129) were collected and assessed by PCR to detect C. burnetii DNA. In parallel, ticks were also collected from vegetation (1169), livestock (335), domestic dogs (169), and wild animals (65). Globally, eight rodents (8%) and two rabbits (1.5%) were found to be positive, with the spleen being the most affected organ. Tick species identified were Hyalomma lusitanicum, Rhipicephalus turanicus, Rhipicephalus sanguineus, and Rhipicephalus pusillus. Hyalomma lusitanicum (80%) was the main species identified in vegetation, livestock, and wild animals, whereas Rhipicephalus sanguineus was the most prevalent in domestic dogs. Overall, C. burnetii DNA was detected in 6.1% of the processed ticks, distributed between those removed from livestock (11.3%), domestic dogs (6.9%), and from wild animals (6%). Ticks from vegetation were all negative. Results suggest that, in the Canary Islands, C. burnetii develops in a peridomestic rather than a wild cycle.

  12. Flank stability and processes off the western Canary Islands: a review from El Hierro and La Palma

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    Roger Urgeles

    2001-07-01

    Full Text Available The morphological characterisation of the western submarine island flanks of El Hierro and La Palma differentiates four type-zones that may give new insights into the evolution of oceanic island slopes. The different type-zones result from the interplay between constructive volcanic processes, hemipelagic settling and volcano collapses. The latter results in massive debris avalanche deposits, which form large volcaniclastic aprons. In most cases, the headwall scarps are clearly exposed on the emerged part of the islands. The events that occurred in the youngest and westernmost islands of El Hierro and La Palma have vertical runouts exceeding 6,000 m and volumes that can reach several hundred km3. The landslide frequency for the entire Canaries is one major event per 90 ka. Triggering mechanisms are closely related to magmatic processes. The increase in the shear stress is directly linked with the forceful intrusion of magma along ridge-rift systems, while in the western Canary Islands it seems that the main process reducing shear resistance may be related to the rise in pore pressure due to hydrothermal circulation.

  13. Mesoscale advection of Upogebia pusilla larvae through an upwelling filament in the Canaries Coastal Transition Zone (CTZ)

    Science.gov (United States)

    Landeira, José María; Lozano-Soldevilla, Fernando; Barton, Eric Desmond

    2012-12-01

    Larval transport has a strong influence on marine populations and ecosystem function. Traditional hypotheses establish that larvae of coastal species are swept offshore during strong upwelling periods producing low recruitment rates; however, recent studies have demonstrated that this hypothesis is not supported by larval distribution data. The present study examines the influence of upwelling filaments on larval advection and wastage. During August 1993, the transport of Upogebia pusilla was analysed in relation to an offshore filament off Northwest Africa. This mesoscale structure was generated by a trapped, quasi-permanent cyclonic eddy located between the Canary Islands and the African shelf and extended 150 km westward into the oligotrophic open ocean waters. The horizontal distribution depicted by U. pusilla larvae was strongly influenced by the oceanographic features of the Canaries Coastal Transition Zone (CTZ). Specifically, the larvae were closely associated with upwelling front and filament position, showing that these neritic larvae can be advected 10-100s of kilometres offshore through the filament. However, the low larval densities observed in the samples suggest that many larvae might remain close to the coast, thus avoiding seaward transport. This implies that filaments probably do not significantly affect the recruitment success of intertidal invertebrates such us U. pusilla in upwelling systems.

  14. Macrorhabdus ornithogaster in ostrich, rhea, canary, zebra finch, free range chicken, turkey, guinea-fowl, columbina pigeon, toucan, chuckar partridge and experimental infection in chicken, japanese quail and mice Macrorhabdus ornithogaster em avestruzes, ema, canário, mandarim, galinha, peru, galinha da Angola, pombo doméstico, rolinha, tucano, perdiz de chuckar e infecção experimental em galinha, codorna e camundongo

    Directory of Open Access Journals (Sweden)

    N.R.S. Martins

    2006-06-01

    Full Text Available Since 2000, Macrorhabdus ornithogaster "megabacteriosis" has been diagnosed in the avian diseases laboratory in a diversity of avian species and varied spectrum of disease. The disease in some species (chickens, turkeys, guinea fowls was clinically characterized by emaciation, prostration, loss of appetite, cachexia and death, with a typically chronic course. A more acute disease was observed in finches (canary-Serinus and zebra-Taeniopygia and budgerigars (Melopsittacus undulatus. The large rod shaped organism, visible from 100 times magnification, with and without staining, could be detected in sick and also in reasonably normal individuals of some species, such as chickens, turkeys, quails and pigeons. In rheas (Rhea americana, ostriches (Struthio camelus, canaries, zebra-finches, guinea-fowl (Numida meleagris and budgerigars. The disease was severe, causing to up to 100% mortality. The infection could be detected in some species along with other infectious or disease problems, such as endoparasites (helminths, coccidia and ectoparasitism (order Mallophaga or/and order Acarina. The cultivation of M. ornithogaster was successfully achieved in solid and liquid media, originated from chickens (four isolates, guinea fowl (1 isolate, chuckar partridge (1 isolate and canary (1 isolate. A very interesting finding at microscopy was motility of M. ornithogaster, as detected both in cultures obtained on agar for pathogenic fungi and passaged into thioglycolate broth, as well as on samples observed in wet preparations from in vivo. Differences in colony aspects were noted among the isolates. Experimental infections were attempted in chicken and japanese quail, using a chicken isolate, allowing the detection of the organism in the proventriculus and liver in apparently normal birds. One chicken isolate was injected intraperitoneally in Balb/c mice and resulted in 100% mortality.Desde 2000, diversos casos de infecção e doença por Macrorhabdus

  15. Rhizobia from Lanzarote, the Canary Islands, that nodulate Phaseolus vulgars have characteristics in common with Sinorhizobium meliloti isolates from mainland Spain

    Science.gov (United States)

    Common bean and Medicago rhizobia isolated from five locations on the island of Lanzarote, the Canary Islands, by partial analysis of 10 chromosomal genes were shown to exhibit close similarity to Sinorhizobium meliloti. Several bean isolates from Lanzarote, mainland Spain and Tunisia nodulated Leu...

  16. Dilute ammonium hydroxide pretreatment of reed canary grass and its simultaneous saccharification and fermentation to ethanol using a xylose-fermenting Saccharomyces cerevisiae strain

    Science.gov (United States)

    Reed canary grass is a temperate perennial grass cultivated widely in the northern hemisphere that has been historically grown for forage. It has been proposed as a candidate bioenergy crop because of its high productivity and its ability to grow on marginal farmlands. The goal of this study was to ...

  17. Extinction of endemic vertebrates on islands : The case of the giant rat Canariomys bravoi (Mammalia, Rodentia) on Tenerife (Canary Islands, Spain)

    NARCIS (Netherlands)

    Bocherens, Herve; Michaux, Jacques; Talavera, Francisco Garcia; Van der Plicht, Johannes

    2006-01-01

    Fossil bone collagen (14)C dating and delta(13)C and delta(15)N isotopic measurements of the rodent Canariomys bravoi from Tenerife (Canary Islands.. Spain) were used to test two different hypotheses about the causes of extinctions of endemic vertebrates on islands. climate versus humans. For the

  18. Simulation of biomass yield of regular and chilling tolerant Miscanthus cultivars and reed canary grass in different climates of Europe

    DEFF Research Database (Denmark)

    Kandel, Tanka Prasad; Hastings, Astley; Jørgensen, Uffe

    2016-01-01

    Miscanthus and reed canary grass (RCG) are C4 and C3 perennial grasses which are popular in Europe as energy crops. Although Miscanthus is relatively chilling tolerant compared to other C4 species, its production in northern Europe is still constrained by cold temperature. A more chilling toleran...

  19. Prenatal and postnatal exposure to DDT by breast milk analysis in Canary Islands.

    Science.gov (United States)

    Vall, Oriol; Gomez-Culebras, Mario; Puig, Carme; Rodriguez-Carrasco, Ernesto; Gomez Baltazar, Arelis; Canchucaja, Lizzeth; Joya, Xavier; Garcia-Algar, Oscar

    2014-01-01

    The use of p,p'-dichlorodiphenyltrichloroethane (DDT) has been banned since the late 1970s due to its toxicity. However, its long half-life makes it persistent in the environment and, consequently, almost everyone has DDT residues in the body. Human milk constitutes an ideal non-conventional matrix to investigate environmental chronic exposure to organochlorine compounds (OCs) residues. The study aimed to identify potential population risk factors of exposure to DDT due to the proximity to countries where it is still used. Seventy-two consecutive lactating women were prospectively included in Tenerife, Canary Islands (Spain). A validated questionnaire was used to obtain socioeconomic, demographics data, and daily habits during pregnancy. DDT levels in breast milk were measured by gas chromatography with-electron capture detector (GC-ECD). Anthropometrics measurements in newborns were obtained. Thirty-four out of 72 (47.2%) of the analysed milk samples presented detectable levels of DDT (mean: 0.92 ng/g), ranging between 0.08 to 16.96 ng/g. The socio-demographic variables did not significantly differ between detectable DDT and non-detectable DDT groups. We found positive association between DDT levels and vegetables (OR (95%CI): 1.23 (1.01-1.50)) and poultry meat (OR (95%CI): 2.05 (1.16-3.60)) consumption, and also between the presence of DDT in breast milk and gestational age (OR (95%CI): 0.59 (0.40-0.90)). DDT is present in breast milk of women at the time of delivery. Residual levels and the spread from countries still using DDT explain DDT detection from vegetables and from animal origin food. The presence of this compound in breast milk represents a pre- and postnatal exposure hazard for foetuses and infants due to chronic bioaccumulation and poor elimination, with possible deleterious effects on health. This data should be used to raise awareness of the risks of OCs exposure and to help establish health policies in order to avoid its use worldwide and thus, to

  20. Prenatal and postnatal exposure to DDT by breast milk analysis in Canary Islands.

    Directory of Open Access Journals (Sweden)

    Oriol Vall

    Full Text Available The use of p,p'-dichlorodiphenyltrichloroethane (DDT has been banned since the late 1970s due to its toxicity. However, its long half-life makes it persistent in the environment and, consequently, almost everyone has DDT residues in the body. Human milk constitutes an ideal non-conventional matrix to investigate environmental chronic exposure to organochlorine compounds (OCs residues. The study aimed to identify potential population risk factors of exposure to DDT due to the proximity to countries where it is still used.Seventy-two consecutive lactating women were prospectively included in Tenerife, Canary Islands (Spain. A validated questionnaire was used to obtain socioeconomic, demographics data, and daily habits during pregnancy. DDT levels in breast milk were measured by gas chromatography with-electron capture detector (GC-ECD. Anthropometrics measurements in newborns were obtained.Thirty-four out of 72 (47.2% of the analysed milk samples presented detectable levels of DDT (mean: 0.92 ng/g, ranging between 0.08 to 16.96 ng/g. The socio-demographic variables did not significantly differ between detectable DDT and non-detectable DDT groups. We found positive association between DDT levels and vegetables (OR (95%CI: 1.23 (1.01-1.50 and poultry meat (OR (95%CI: 2.05 (1.16-3.60 consumption, and also between the presence of DDT in breast milk and gestational age (OR (95%CI: 0.59 (0.40-0.90.DDT is present in breast milk of women at the time of delivery. Residual levels and the spread from countries still using DDT explain DDT detection from vegetables and from animal origin food. The presence of this compound in breast milk represents a pre- and postnatal exposure hazard for foetuses and infants due to chronic bioaccumulation and poor elimination, with possible deleterious effects on health. This data should be used to raise awareness of the risks of OCs exposure and to help establish health policies in order to avoid its use worldwide and thus

  1. Lithospheric magma dynamics beneath the El Hierro Volcano, Canary Islands: insights from fluid inclusions

    Science.gov (United States)

    Oglialoro, E.; Frezzotti, M. L.; Ferrando, S.; Tiraboschi, C.; Principe, C.; Groppelli, G.; Villa, I. M.

    2017-10-01

    At active volcanoes, petrological studies have been proven to be a reliable approach in defining the depth conditions of magma transport and storage in both the mantle and the crust. Based on fluid inclusion and mineral geothermobarometry in mantle xenoliths, we propose a model for the magma plumbing system of the Island of El Hierro (Canary Islands). The peridotites studied here were entrained in a lava flow exposed in the El Yulan Valley. These lavas are part of the rift volcanism that occurred on El Hierro at approximately 40-30 ka. The peridotites are spinel lherzolites, harzburgites, and dunites which equilibrated in the shallow mantle at pressures between 1.5 and 2 GPa and at temperatures between 800 and 950 °C (low-temperature peridotites; LT), as well as at higher equilibration temperatures of 900 to 1100 °C (high-temperature peridotites; HT). Microthermometry and Raman analyses of fluid inclusions reveal trapping of two distinct fluid phases: early type I metasomatic CO2-N2 fluids ( X N2 = 0.01-0.18; fluid density (d) = 1.19 g/cm3), coexisting with silicate-carbonate melts in LT peridotites, and late type II pure CO2 fluids in both LT (d = 1.11-1.00 and 0.75-0.65 g/cm3) and HT ( d = 1.04-1.11 and 0.75-0.65 g/cm3) peridotites. While type I fluids represent metasomatic phases in the deep oceanic lithosphere (at depths of 60-65 km) before the onset of magmatic activity, type II CO2 fluids testify to two fluid trapping episodes during the ascent of xenoliths in their host mafic magmas. Identification of magma accumulation zones through interpretation of type II CO2 fluid inclusions and mineral geothermobarometry indicate the presence of a vertically stacked system of interconnected small magma reservoirs in the shallow lithospheric mantle between a depth of 22 and 36 km (or 0.67 to 1 GPa). This magma accumulation region fed a short-lived magma storage region located in the lower oceanic crust at a depth of 10-12 km (or 0.26-0.34 GPa). Following our model

  2. Active tectonics on Lanzarote (Canary Islands) from the analysis of CGPS data

    Science.gov (United States)

    Riccardi, Umberto; Arnoso, Jose; Benavent, María Teresa; Velez, Emilio; Tammaro, Umberto; González Montesinos, Fuensanta

    2017-04-01

    We report on the analysis of about three years of CGPS data collected on a small network consisting in five permanent stations, with the largest baseline up to 40 km, spread over Timanfaya National Park in Lanzarote Island. The GPS stations are operated by different institutions, as follows: CAME is co-operated by the Institute of Geosciences (CSIC-UCM), DiSTAR and the Geodesy Research Group of University Complutense of Madrid (GRG-UCM), while LACV is operated by (CSIC-UCM and GRG-UCM). Stations HRIA, TIAS, YAIZ, belong to GRAFCAN (Cartographical Service of the Government of Canary Islands). Lanzarote is the most Northeast and the oldest island of the Canarian Archipelago (Spain), which is located on a transitional zone, a passive margin, between oceanic and continental crust. Due to some peculiarities in geochemistry and geochronology of the rocks as well as tectonics, the origin of the archipelago from a hot spot is still debated. In fact, the most recent Holocenic volcanism is scattered over the islands and the last eruption was a submarine one, occurred in October 2011 at El Hierro Island. The last eruption in Lanzarote was a 7 years voluminous eruptive cycle, occurred during the 18th century. Historical seismicity registered in the region, is customarily attributed to diffuse tectonic activity. This study is intended to contributing to shed light on the active tectonics on Lanzarote island and to separate between local and regional strain fields. With the aid of Gamit 10.6 software, we compute from the GPS observations the "ionofree" linear combinations in order to obtain the positions of the stations in ITRF2008 frame using daily sessions, and IGS precise ephemeris. The frame referencing of the network is realized by eleven IGS GPS stations. Then through a Kalman filtering procedure, implemented in GLOBK software, we obtain the final daily solutions by constraining the fiducial GPS stations to their ITRF2008 coordinates. For a reliable strain field retrieval

  3. Prenatal and Postnatal Exposure to DDT by Breast Milk Analysis in Canary Islands

    Science.gov (United States)

    Vall, Oriol; Gomez-Culebras, Mario; Puig, Carme; Rodriguez-Carrasco, Ernesto; Gomez Baltazar, Arelis; Canchucaja, Lizzeth; Joya, Xavier; Garcia-Algar, Oscar

    2014-01-01

    Introduction The use of p,p′-dichlorodiphenyltrichloroethane (DDT) has been banned since the late 1970s due to its toxicity. However, its long half-life makes it persistent in the environment and, consequently, almost everyone has DDT residues in the body. Human milk constitutes an ideal non-conventional matrix to investigate environmental chronic exposure to organochlorine compounds (OCs) residues. The study aimed to identify potential population risk factors of exposure to DDT due to the proximity to countries where it is still used. Methods Seventy-two consecutive lactating women were prospectively included in Tenerife, Canary Islands (Spain). A validated questionnaire was used to obtain socioeconomic, demographics data, and daily habits during pregnancy. DDT levels in breast milk were measured by gas chromatography with-electron capture detector (GC-ECD). Anthropometrics measurements in newborns were obtained. Results Thirty-four out of 72 (47.2%) of the analysed milk samples presented detectable levels of DDT (mean: 0.92 ng/g), ranging between 0.08 to 16.96 ng/g. The socio-demographic variables did not significantly differ between detectable DDT and non-detectable DDT groups. We found positive association between DDT levels and vegetables (OR (95%CI): 1.23 (1.01–1.50)) and poultry meat (OR (95%CI): 2.05 (1.16–3.60)) consumption, and also between the presence of DDT in breast milk and gestational age (OR (95%CI): 0.59 (0.40–0.90)). Conclusions DDT is present in breast milk of women at the time of delivery. Residual levels and the spread from countries still using DDT explain DDT detection from vegetables and from animal origin food. The presence of this compound in breast milk represents a pre- and postnatal exposure hazard for foetuses and infants due to chronic bioaccumulation and poor elimination, with possible deleterious effects on health. This data should be used to raise awareness of the risks of OCs exposure and to help establish health policies

  4. Constraints on the geometry of the shallow magmatic system of Tenerife Island (Canary Islands)

    Science.gov (United States)

    Aragó, Silvia; Geyer, Adelina; Marti, Joan

    2014-05-01

    The geological evolution of Tenerife (Canary Island) involves the construction of a basaltic shield ( 3.5 Ma to Present). Towards the end of the main shield-building episode (Old Basaltic Series), volcanic activity migrated to the central part of the island. This lead to the formation of shallow magma chambers and the construction of the Central Volcanic Complex through a series of cycles always characterized by a similar events sequence: 1) continuous ascent of mantle-derived basaltic magmas; 2) formation of discrete shallow phonolitic magma chambers and related eruptions; 3) a final caldera-forming event destroying the constructed volcanic edifice and the associated magmatic reservoir; 4) eruption of basaltic magmas in the central part of the island; and 5) formation of a new shallow magma chamber. As the latter may emplace at a new location, the locus of phonolitic volcanic activity migrated to other sectors of the central part of Tenerife. During the last 1.56 Ma years, this long-term (>200 ka) cycle of phonolitic explosive activity has repeated thrice culminating in the Ucanca, Guajara and Diego Hernandez overlapping vertical collapses; altogether referred to as Las Cañadas Caldera. The present Teide-Pico Viejo complex is interpreted to be the beginning of the fourth cycle. The objective of this work is to determine the geometrical constraints (including volume, depth, location and shape) of the shallow magmatic reservoirs active during each eruptive cycle. For this, we use new fieldwork data collected along Las Cañadas caldera wall where an important amount of phonolitic dykes have been identified. These include cone-sheets, radial and concentric dykes. The cross cutting relationship between the different dyke families indicate several intrusion episodes from diverse magma sources during the construction of the Central Complex. New 3D Finite Element Model results obtained provide a first-order characterization of the different shallow magma chambers from

  5. New structural, hydrogeological and hydrothermal insights on Cumbre Vieja (La Palma, Canary Islands, Spain)

    Science.gov (United States)

    Barde-Cabusson, S.; Finizola, A.; Torres, P.; Víctor Villasante-Marcos, V.; Abella, R.; Aragó, S.; Berthod, C.; Ibarra, P.; Geyer Traver, A.

    2013-12-01

    Determining the link between shallow structure and volcanism is a topic of interest in Volcanology. We carried out a geophysical study devoted to the characterization of the major structural limits influencing volcanic hydrothermal activity and underground meteoric circulations in La Palma (Canary Islands). Since 1 Ma volcanic activity concentrates at the southern half of the island, on the Cumbre Vieja volcanic rift-zone. During the 1949 eruption a N-S fault system, facing west, developed in the summit area of Cumbre Vieja. This was interpreted as the surface expression of an incipient deformation zone on the western flank. The distribution of the recent activity and faulting indicate that a discontinuity may be present beneath the western flank of Cumbre Vieja, along which a future collapse may occur. Our study, which combines the application of self-potential and soil temperature measurements, provides new information to characterize and locate the limits guiding upward or downward fluid circulation and possibly associated to future failures and potential landslides on the Cumbre Vieja rift-zone. We found a clear asymmetry of the self-potential signal between the eastern and the western flanks of Cumbre Vieja. Strong infiltration of meteoric water seems to affect most of the summit axis while we observe poor variation in the self-potential values on the western flank. This could be explained by a constant thickness of the vadose zone on this flank, i.e., the presence of an impermeable layer at constant depth. This layer could correspond to the landslide interface associated to the previous Cumbre Nueva edifice destruction, on which Cumbre Vieja is currently growing. This constant self-potential pattern is interrupted by at least one other main infiltration zone, near Tajuya volcano, at 1200 m a.s.l. on the western flank, where field observation allowed identifying a small horst-graben system. However it is not clear if this fault system results from local

  6. Monitoring fugitive CH4 and CO2 emissions from a closed landfill at Tenerife, Canary Islands

    Science.gov (United States)

    Asensio-Ramos, María; Tompkins, Mitchell R. K.; Turtle, Lara A. K.; García-Merino, Marta; Amonte, Cecilia; Rodrígez, Fátima; Padrón, Eleazar; Melián, Gladys V.; Padilla, Germán; Barrancos, José; Pérez, Nemesio M.

    2017-04-01

    Solid waste must be managed systematically to ensure environmental best practices. One of the ways to manage this huge problem is to systematic dispose waste materials in locations such as landfills. However, landfills could face possible threats to the environment such as groundwater pollution and the release of landfill gases (CH4, volatile organic compounds, etc.) to the atmosphere. These structures should be carefully filled, monitored and maintained while they are active and for up to 30 years after they are closed. Even after years of being closed, a systematically amount of landfill gas could be released to the atmosphere through its surface in a diffuse and fugitive form. During the period 1999-2016, we have studied the spatial-temporal distribution of the surface fugitive emission of CO2 and CH4 into the atmosphere in a cell in the Arico's municipal landfill (0.3 km2) at Tenerife, Canary Islands, Spain. This cell was operative until 2004, when it was filled and closed. Monitoring these diffuse landfill emissions provides information of how the closed landfill is degassing. To do so, we have performed 9 gas emission surveys during the period 1999-2016. Surface landfill CO2 efflux measurements were carried out at around 450 sampling site by means of a portable non-dispersive infrared spectrophotometer (NDIR) model LICOR Li800 following the accumulation chamber method. Landfill gases taken in the chamber were analyzed using a double channel VARIAN 4900 micro-GC. CH4 efflux measurements were computed combining CO2 efflux measurements and CH4/CO2 ratio in the landfill's surface gas. To quantify the total CH4 emission, CH4 efflux contour map was constructed using sequential Gaussian simulation (sGs) as interpolation method. In general, a decrease in the CO2 emission is observed since the cell was closed (2004) to the present. The total CO2 and CH4 diffuse emissions estimated in the 2016 survey were 4.54 ± 0.14 t d-1 and 268.65 ± 17.99 t d-1, respectively

  7. The continental slope current system between Cape Verde and the Canary Islands

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    Jesús Peña-Izquierdo

    2012-08-01

    Full Text Available We use hydrographic, velocity and drifter data from a cruise carried out in November 2008 to describe the continental slope current system in the upper thermocline (down to 600 m between Cape Verde and the Canary Islands. The major feature in the region is the Cape Verde Frontal Zone (CVFZ, separating waters from tropical (southern and subtropical (northern origin. The CVFZ is found to intersect the slope north of Cape Blanc, between 22°N and 23°N, but we find that southern waters are predominant over the slope as far north as 24°N. South of Cape Blanc (21.25°N the Poleward Undercurrent (PUC is a prominent northward jet (50 km wide, reaching down to 300 m and indistinguishable from the surface Mauritanian Current. North of Cape Blanc the upwelling front is found far offshore, opening a near-slope northward path to the PUC. Nevertheless, the northward PUC transport decreases from 2.8 Sv at 18°N to 1.7 Sv at 24°N, with about 1 Sv recirculating ofshore just south of Cape Blanc, in agreement with the trajectory of subsurface drifters. South of the CVFZ there is an abrupt thermohaline transition at σϴ=26.85 kg m–3, which indicates the lower limit of the relatively pure (low salt and high oxygen content South Atlantic Central Water (SACW variety that coexists with the dominant locally-diluted (salinity increases through mixing with North Atlantic Central Water but oxygen diminishes because of enhanced remineralization Cape Verde (SACWcv variety. At 16°N about 70% of the PUC transport corresponds to the SACW variety but but this is transformed into 40% SACWcv at 24°N. However, between Cape Verde and Cape Blanc and in the 26.85 < σϴ < 27.1 layer, we measure up to 0.8 Sv of SACWcv being transported south. The results strongly endorse the idea that the slope current system plays a major role in tropical-subtropical water-mass exchange.

  8. La aplicación de la música tradicional canaria en las aulas: un reto didáctico para el profesorado

    Directory of Open Access Journals (Sweden)

    Delgado, José C.

    2005-05-01

    Full Text Available La música tradicional canaria constituye uno de los fenómenos folklóricos más interesantes en cuanto a su diversidad y calidad, y ocupa un lugar importante dentro del panorama musical del estado, no sólo por el número de cantos y bailes que ha aportado al rico y variado folklore musical español, sino también por la cantidad de investigaciones y datos que de ella se han recogido. Son numerosas las razones que justifican el uso de la música tradicional en las aulas, así como los valores que aporta la música de tradición oral y su aplicación con fines didácticos. Los contenidos canarios son esenciales a la hora de estudiar y conocer la cultura universal partiendo del entorno. La mayoría de los géneros musicales canarios nos proporcionan un caudal importante de textos, melodías y danzas que son susceptibles de ser utilizados en el aula. Sin embargo, la aplicación en el aula de la música tradicional constituye un reto para el profesorado de música que se enfrenta muchas veces a un lenguaje desconocido.

  9. Determinantes estratégicos en la formación de la lealtad del joven residente: el caso de las Islas Canarias

    Directory of Open Access Journals (Sweden)

    José Alberto Martínez González

    2017-03-01

    Full Text Available El objetivo de este estudio es determinar las variables estratégicas que intervienen en la formación de la lealtad del joven residente en un destino formado por islas y en un contexto de turismo doméstico. Utilizando una muestra de 678 jóvenes residentes en las Islas Canarias (España, se ha generado un modelo estructural significativo en el que se incluyen variables relacionadas con la empresa, con el producto turístico y con el residente. Los resultados demuestran que la orientación al mercado constituye el primer eslabón de una cadena de efectos que conducen a la lealtad, y que la satisfacción es la única variable que determina directamente la lealtad. Los resultados también constatan que no existen diferencias significativas en dichas percepciones por razones de sexo, isla de residencia o cantidad de viajes realizados. Este hallazgo pone de manifiesto el carácter generacional del estudio y la posibilidad de generalizar las conclusiones sobre dicho segmento a otros destinos.

  10. Biodemografía y cultura: reflexiones metodológicas en torno a un estudio de inmigración canaria

    Directory of Open Access Journals (Sweden)

    González Márquez, María N.

    2005-01-01

    Full Text Available El presente estudio se enmarca en un proyecto de investigación biodemográfica sobre inmigración canaria en el departamento de Canelones (denominado "el departamento canario" en Uruguay. El caso en el que nos centramos posee características particulares, al tiempo que presenta problemas metodológicos comunes a diversos enfoques de este tipo, basados en el análisis de archivos históricos (archivos parroquiales, padrones, y otros y de encuestas a población actual. Se analizan las dificultades del trabajo a la luz de la experiencia de campo, especialmente con relación al enfoque biodemográfico, considerando sus fuentes de información y la construcción de datos a partir de ellas. Se delinea el papel que le cabe a los aspectos culturales en la construcción de conocimiento biodemográfico y se presentan aportes a problemas metodológicos comunes a la disciplina. Entre estos, la importancia del cruzamiento de fuentes resulta reveladora, así como la importancia de un conocimiento pleno de la sociedad a la que se analiza.

  11. Coarse-Grained Tsunami Deposits in the Canary Islands: Evidence of the Tsunamigenic Potential of Volcanic Flank Failures

    Science.gov (United States)

    Austin-Giddings, W. D.; Tappin, D. R.; McGuire, W. J.

    2008-12-01

    Coarse-grained, polymict deposits draping hillslopes at high elevations on ocean island volcanoes have been variously interpreted as sourced from sea-level high-stands and tsunamis, their origin is thus controversial. Here, we present a detailed facies analysis of coarse-grained, fossiliferous sediments located at Agaete, on the north-west coast of Gran Canaria. Previously interpreted as the result of a sea-level high-stand, these deposits have recently been re-interpreted as sourced from a tsunami resulting from a volcano flank collapse. The tsunami deposit occurs at several locations in the Agaete valley, up to 188 m a.s.l. and two kilometres inland from the coast. The sediments comprise two reverse graded units, separated by a soil horizon with calcrete. The units are up to 2 m in thickness and contain a diverse assemblage of volcanic clasts, large beachrock boulders and a marine fauna that includes planktic, shallow and deep-water benthic foraminifera. The base of the lower unit is erosional and truncates plant roots and contains large soil clasts up to 1.5m in diameter. The upper unit is finer grained and is more extensive. At one location the lower unit comprises prograding beds that are interpreted as alluvial. The alternative 'high-stand' interpretation of the coarse-grained deposit is here discounted because of the absence of supporting geomorphological features such as a marine terrace and/or a wave cut platform, the composition of the sediments and their altitude. A tsunami origin is therefore proposed. Gran Canaria is in its post-shield erosional stage of development and has experienced limited vertical uplift of ~40-50 m over the past 1.75 Ma. Thus uplift cannot account for the occurrence of the sediments at elevations of 188 m a.s.l. The Güimar lateral collapse on the neighbouring island of Tenerife (~800ka) has been cited as a possible source. U/Pb dating of the deposits is currently being undertaken.

  12. Influence of the submarine volcanic eruption off El Hierro (Canary Islands) on the mesopelagic cephalopod's metal content.

    Science.gov (United States)

    Lozano-Bilbao, Enrique; Gutiérrez, Ángel José; Hardisson, Arturo; Rubio, Carmen; González-Weller, Dailos; Aguilar, Natacha; Escánez, Alejandro; Espinosa, José María; Canales, Paula; Lozano, Gonzalo

    2017-10-12

    This work investigates whether a submarine volcanic eruption off El Hierro (Canary Islands) in October 2011 influenced the metal contents of two deep water cephalopod species: Abraliopsis morisii and Pyroteuthis margaritifera. This was assessed by comparing metal contents in specimens collected off the island of El Hierro and in the neighbouring islands of La Palma and Tenerife during an experimental deep water fishing trip. The concentration of 20 heavy metals was analyzed in 180 specimens of A. morisii and P. margaritifera collected around the three islands to test for inter-island differences for each species and metal. While both species showed geographical differences in metal concentrations, the main finding was that A. morisii could be a bioindicator species for metals such as Li, Sr and Ca. Copyright © 2017 Elsevier Ltd. All rights reserved.

  13. Spaces of transition: Young people’s social practices in Santa Cruz de Tenerife (Canary Islands, Spain

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    Díaz-Rodríguez, Mª Carmen

    2015-03-01

    Full Text Available Within the context of the growing interest in the study of young people in urban environments, the present article examines their relational spaces in a southern European city: Santa Cruz de Tenerife (Canary Islands, Spain –with a view to identifying the places they frequent and establishing whether or not the most widely-used ones form a spatial network offering them different recreational opportunities. Combining quantitative and qualitative methods, the paper explores the social practices of young people. The information obtained reveals the significance of open public spaces and shopping malls for young people generally, although differences are seen in their practices according to age, gender and social background. The results also suggest that, in the routes they take and their stays in the aforementioned places, young people create a network of meeting spaces that owes more to the construction of their identity than to the existence of complementary formulas for recreation.

  14. Spatial and seasonal variation of the gonad index of Diadema antillarum (Echinodermata:Echinoidea in the Canary Islands

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    José Carlos Hernández

    2006-12-01

    Full Text Available Diadema antillarum Philippi occurs in high density populations in the Canary Islands, creating extensive barren areas. During one year we determined seasonal changes in the algal abundance and population densities, test diameter, gut contents and gonad index of sea urchins in two localities (Abades and Boca Cangrejo. Boca Cangrejo shows higher algae cover and species richness than Abades. The sea urchin population at Abades had a higher density and smaller urchins than Boca Cangrejo. Boca Cangrejo sea urchins showed higher specific richness in gut contents than Abades urchins. The sea urchin population at Abades did not have a clearer reproductive periodicity or higher gonad index than the Boca Cangrejo population. Temporal and spatial changes in gonad periodicity of Diadema antillarum are attributed, at least in part, to benthic food availability (algal cover and algal species number and intra-specific competition.

  15. Occurrence of contamination by controlled substances in Euro banknotes from the Spanish archipelago of the Canary Islands.

    Science.gov (United States)

    Luzardo, Octavio P; Almeida, Maira; Zumbado, Manuel; Boada, Luis D

    2011-11-01

    The social problems of drug abuse are a matter of increasing global problem. Nowadays, international agencies need fresh methods to monitor trends of the use of illicit drugs. In this sense, small amounts of drugs are transferred to banknotes and they could be detected and quantified. An analytical procedure based upon extraction with organic solvent, liquid chromatography separation, and mass spectrometric detection allowed the identification of 21 drugs and metabolites in 120 used Euro banknotes collected in the Canary Islands (Spain). Most of the banknotes analyzed showed detectable drug residues (92.5%). Cocaine was the most frequently detected drug, present in approximately 90% of the samples. In addition, 75%, 35%, and 15% of the banknotes showed residues of amphetamine derivatives, opiates, and benzodiazepines, respectively. An average of three drug residues per banknote was detected. In summary, the presence of drug residues in banknotes could be useful as tracer for drugs prevalence. © 2011 American Academy of Forensic Sciences.

  16. Reed canary grass as energy and fiber raw material; Roerflen som energi- och fiberraavara. En system- och ekonomistudie

    Energy Technology Data Exchange (ETDEWEB)

    Olsson, Rolf; Rosenqvist, H.; Vinterbaeck, J.; Burvall, J.; Finell, M.

    2001-12-01

    In this report, a system and economic analysis is reported for cultivation of RCG for energy purpose and as a raw material for the paper industry. The interest in cultivation of Reed Canary Grass (RCG) is growing in Sweden due to the new tax on waste disposal, since sewage sludge could be recycled in RCG cultivation. Increased carbon sinks in soil is another positive factor. Plant selection work in Finland and Sweden have resulted in 20% higher harvests than the feed varieties of RCG. Silty/sandy soils give highest yields. Before investments could be made in paper industry, a production volume of about 100,000 tons/year would have to be reached, demand a cultivation area of about 40,000 ha. The initial market before this level is reached should be the energy sector, specially smaller district heating systems. Processed to pellets, briquettes or powder, RCG can substitute fuel oil.

  17. Planck intermediate results. XXXVI. Optical identification and redshifts of Planck SZ sources with telescopes at the Canary Islands observatories

    Science.gov (United States)

    Planck Collaboration; Ade, P. A. R.; Aghanim, N.; Arnaud, M.; Ashdown, M.; Aumont, J.; Baccigalupi, C.; Banday, A. J.; Barreiro, R. B.; Barrena, R.; Bartolo, N.; Battaner, E.; Benabed, K.; Benoit-Lévy, A.; Bernard, J.-P.; Bersanelli, M.; Bielewicz, P.; Bikmaev, I.; Böhringer, H.; Bonaldi, A.; Bonavera, L.; Bond, J. R.; Borrill, J.; Bouchet, F. R.; Burenin, R.; Burigana, C.; Calabrese, E.; Cardoso, J.-F.; Catalano, A.; Chamballu, A.; Chary, R.-R.; Chiang, H. C.; Chon, G.; Christensen, P. R.; Clements, D. L.; Colombo, L. P. L.; Combet, C.; Comis, B.; Crill, B. P.; Curto, A.; Cuttaia, F.; Dahle, H.; Danese, L.; Davies, R. D.; Davis, R. J.; de Bernardis, P.; de Rosa, A.; de Zotti, G.; Delabrouille, J.; Diego, J. M.; Dole, H.; Donzelli, S.; Doré, O.; Douspis, M.; Dupac, X.; Efstathiou, G.; Elsner, F.; Enßlin, T. A.; Eriksen, H. K.; Ferragamo, A.; Finelli, F.; Forni, O.; Frailis, M.; Fraisse, A. A.; Franceschi, E.; Fromenteau, S.; Galeotta, S.; Galli, S.; Ganga, K.; Génova-Santos, R. T.; Giard, M.; Gjerløw, E.; González-Nuevo, J.; Górski, K. M.; Gruppuso, A.; Hansen, F. K.; Harrison, D. L.; Hempel, A.; Hernández-Monteagudo, C.; Herranz, D.; Hildebrandt, S. R.; Hivon, E.; Hornstrup, A.; Hovest, W.; Huffenberger, K. M.; Hurier, G.; Jaffe, T. R.; Keihänen, E.; Keskitalo, R.; Khamitov, I.; Kisner, T. S.; Kneissl, R.; Knoche, J.; Kunz, M.; Kurki-Suonio, H.; Lamarre, J.-M.; Lasenby, A.; Lattanzi, M.; Lawrence, C. R.; Leonardi, R.; León-Tavares, J.; Levrier, F.; Lietzen, H.; Liguori, M.; Lilje, P. B.; Linden-Vørnle, M.; López-Caniego, M.; Lubin, P. M.; Macías-Pérez, J. F.; Maffei, B.; Maino, D.; Mandolesi, N.; Maris, M.; Martin, P. G.; Martínez-González, E.; Masi, S.; Matarrese, S.; McGehee, P.; Melchiorri, A.; Mennella, A.; Migliaccio, M.; Miville-Deschênes, M.-A.; Moneti, A.; Montier, L.; Morgante, G.; Mortlock, D.; Munshi, D.; Murphy, J. A.; Naselsky, P.; Nati, F.; Natoli, P.; Novikov, D.; Novikov, I.; Oxborrow, C. A.; Pagano, L.; Pajot, F.; Paoletti, D.; Pasian, F.; Perdereau, O.; Pettorino, V.; Piacentini, F.; Piat, M.; Pierpaoli, E.; Plaszczynski, S.; Pointecouteau, E.; Polenta, G.; Pratt, G. W.; Prunet, S.; Puget, J.-L.; Rachen, J. P.; Rebolo, R.; Reinecke, M.; Remazeilles, M.; Renault, C.; Renzi, A.; Ristorcelli, I.; Rocha, G.; Rosset, C.; Rossetti, M.; Roudier, G.; Rubiño-Martín, J. A.; Rusholme, B.; Sandri, M.; Santos, D.; Savelainen, M.; Savini, G.; Scott, D.; Stolyarov, V.; Streblyanska, A.; Sudiwala, R.; Sunyaev, R.; Suur-Uski, A.-S.; Sygnet, J.-F.; Tauber, J. A.; Terenzi, L.; Toffolatti, L.; Tomasi, M.; Tramonte, D.; Tristram, M.; Tucci, M.; Valenziano, L.; Valiviita, J.; Van Tent, B.; Vielva, P.; Villa, F.; Wade, L. A.; Wandelt, B. D.; Wehus, I. K.; Yvon, D.; Zacchei, A.; Zonca, A.

    2016-02-01

    We present the results of approximately three years of observations of Planck Sunyaev-Zeldovich (SZ) sources with telescopes at the Canary Islands observatories as part of the general optical follow-up programme undertaken by the Planck Collaboration. In total, 78 SZ sources are discussed. Deep-imaging observations were obtained for most of these sources; spectroscopic observations in either in long-slit or multi-object modes were obtained for many. We effectively used 37.5 clear nights. We found optical counterparts for 73 of the 78 candidates. This sample includes 53 spectroscopic redshift determinations, 20 of them obtained with a multi-object spectroscopic mode. The sample contains new redshifts for 27 Planck clusters that were not included in the first Planck SZ source catalogue (PSZ1).

  18. Evidence of a modern deep water magmatic hydrothermal system in the Canary Basin (eastern central Atlantic Ocean)

    Science.gov (United States)

    Medialdea, T.; Somoza, L.; González, F. J.; Vázquez, J. T.; de Ignacio, C.; Sumino, H.; Sánchez-Guillamón, O.; Orihashi, Y.; León, R.; Palomino, D.

    2017-08-01

    New seismic profiles, bathymetric data, and sediment-rock sampling document for the first time the discovery of hydrothermal vent complexes and volcanic cones at 4800-5200 m depth related to recent volcanic and intrusive activity in an unexplored area of the Canary Basin (Eastern Atlantic Ocean, 500 km west of the Canary Islands). A complex of sill intrusions is imaged on seismic profiles showing saucer-shaped, parallel, or inclined geometries. Three main types of structures are related to these intrusions. Type I consists of cone-shaped depressions developed above inclined sills interpreted as hydrothermal vents. Type II is the most abundant and is represented by isolated or clustered hydrothermal domes bounded by faults rooted at the tips of saucer-shaped sills. Domes are interpreted as seabed expressions of reservoirs of CH4 and CO2-rich fluids formed by degassing and contact metamorphism of organic-rich sediments around sill intrusions. Type III are hydrothermal-volcanic complexes originated above stratified or branched inclined sills connected by a chimney to the seabed volcanic edifice. Parallel sills sourced from the magmatic chimney formed also domes surrounding the volcanic cones. Core and dredges revealed that these volcanoes, which must be among the deepest in the world, are constituted by OIB-type, basanites with an outer ring of blue-green hydrothermal Al-rich smectite muds. Magmatic activity is dated, based on lava samples, at 0.78 ± 0.05 and 1.61 ± 0.09 Ma (K/Ar methods) and on tephra layers within cores at 25-237 ky. The Subvent hydrothermal-volcanic complex constitutes the first modern system reported in deep water oceanic basins related to intraplate hotspot activity.Plain Language SummarySubmarine volcanism and associated hydrothermal systems are relevant processes for the evolution of the ocean basins, due their impact on the geochemistry of the oceans, their potential to form significant ore deposits, and their implications for global climate

  19. Giraudia sphacelarioides (Phaeophyceae) at the Canary Islands and in Danish waters: a study in ecotypic differentiation and its biogeographical implications

    DEFF Research Database (Denmark)

    Kristiansen, Aase; Pedersen, Poul Møller

    2003-01-01

    Comparative culture studies on isolates from Lanzarote (Canary Islands) and from Danish waters of Giraudia sphacelarioides show that temperature plays the key role to determine its geographical distribution. Experiments show that the upper lethal temperature is the same for both isolates 26...... in relation to temperature, while the macrothalli occur only when more suitable conditions exist in nature. In the North Atlantic Ocean G. sphacelarioides is distributed over approximately 30° latitudes with severe winter temperatures especially in Danish waters. This distribution can only be explained...... by ecotypic differentiation. In Danish waters salinity decreases from c. 30 ‰ in the northern Kattegat to below 8 ‰ in the inner parts and therefore becomes an important factor for the immigration of species into the Baltic Sea. Combined salinity (30-20-10-5 ‰) and temperature (4 to 30°C) experiments show...

  20. Stomoxys calcitrans as possible vector of Trypanosoma evansi among camels in an affected area of the Canary Islands, Spain

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    Noé Francisco Rodríguez

    2014-07-01

    Full Text Available Introduction Trypanosoma evansi was first identified in the Canary Islands in 1997, and is still present in a small area of the Archipelago. To date, the disease has exclusively affected camel herds, and has not been detected in any other animal hosts. However potential vectors of Trypanosoma evansi must be identified. Methods One Nzi trap was placed on a camel farm located in the infected area for a period of one year. Results Two thousand five hundred and five insects were trapped, of which Stomoxys calcitrans was the sole hematophagous vector captured. Conclusions Stomoxys calcitrans could be exclusively responsible for the transmission of Trypanosoma evansi among camels in the surveyed area, as other species do not seem to be infected by S. calcitrans in the presence of camels.