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Sample records for birds theropoda aves

  1. Bone histology, phylogeny, and palaeognathous birds (Aves, Palaeognathae)

    DEFF Research Database (Denmark)

    Legendre, Lucas; Bourdon, Estelle; Scofield, Paul;

    2014-01-01

    a comprehensive study in which we quantify the phylogenetic signal on 62 osteohistological features in an exhaustive sample of palaeognathous birds. We used four different estimators to measure phylogenetic signal – Pagel’s λ, Abouheif’s Cmean, Blomberg’s K, and Diniz-Filho’s phylogenetic eigenvector regressions...

  2. Valoracion sanitaria de los criaderos de aves ornamentales - Sanitary control in ornamental birds facilities

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    Dr. Carlos J. Soto Piñeiro

    2012-07-01

    Full Text Available ResumenTener una vision de prevencion sanitaria en criaderos de aves ornamentales se ha ido conformando en la medida en que se ha comenzado a mutiplicar este tipo de cria especializada, apoyadas por las investigaciones clinicassobre estas especies y aunque existen principios de control sanitarios generales que podemos transpolar de la cria de animales de granja, tambièn es necesario aplicar otros de acuerdo a las particularidades de este tipo de instalaciones, especies aviares y enfermedades que estàn propensas a padecer.AbstractIn the last decades the breeding of ornamental birds and parrots has worldwide expanded and consequently increased the need to develop management methods and meseaures to prevent the spread of diseases.Generally the principles of sanitary surveillance of poultry farming were applied, adding the changes required by the type of structure and species bred.

  3. DETERMINACIÓN DE SEXO EN AVES MEDIANTE HERRAMIENTAS MOLECULARES Sex Determination In Birds By Molecular Tools

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    NUBIA E MATTA CAMACHO

    Full Text Available La ausencia de dimorfismo sexual en los estadios juveniles y durante la edad adulta de gran cantidad de especies de aves, dificulta o imposibilita la determinación del sexo basados en el fenotipo. El empleo de marcadores moleculares para determinar el sexo de las aves es una herramienta útil debido a la exactitud y rapidez de los resultados y a su vez se constituye en un método que minimiza el estrés durante la toma de muestra, comparado con otras técnicas invasivas que pudieran afectar la salud o estabilidad biológica del animal. La determinación temprana del sexo en aves resulta de especial relevancia cuando se consideran programas de conservación ex situ, producción, explotación y estudios de ecología de poblaciones. Esta revisión presenta las metodologías usadas para determinar el sexo, haciendo especial énfasis en herramientas moleculares, presentando sus ventajas y limitaciones.The lack of sexual dimorphism in nestling, juvenile or adult birds of large number of avian species, makes it difficult or impossible sex determination based on phenotipic characteristics. To use molecular markers for bird sex determination is a rapid and safe procedure; moreover this methodology minimizes the stress during sampling, compared to other invasive techniques that could affect the health or biological stability of the animal. The early sex determination in birds is of particular importance when considering ex situ conservation programs, production, exploitation or population ecology studies. This review presents the methodologies used to sex determination, making emphasize on molecular tools, showing its advantages and limitations

  4. Are camouflaged seeds less attacked by wild birds? Sementes camufladas são menos atacadas por aves silvestres?

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    Alexandre de Almeida

    2010-04-01

    Full Text Available Wheat, corn and rice crops in Brazil use seeds treated with systemic insecticide/nematicide carbofuran, mixed to rhodamine B red dye. Carbofuran is toxic and rhodamine B is attractive to wild birds that eat up these seeds, resulting in notable mortality during planting. A field experiment was performed in southeast Brazil to evaluate if camouflaged seeds would be less consumed by wild birds in comparison to commercial seeds with red-colored rhodamine B and aposematic blue seeds. Camouflaged seeds were less removed than seeds with rhodamine B and natural colors. The camouflaging was more effective in the presence of irregularities and litter. There was no removal of blue-colored seeds. As legislation requires treated seeds to receive a different color to avoid accidents with humans, camouflaging may be used as replacement of rhodamine B to reduce mortality rates of wild birds.Plantações de trigo milho e arroz no Brasil utilizam sementes tratadas com o inseticida e nematicida sistêmico carbofuran, associado ao corante vermelho rodamina B. O carbofuran é tóxico e a rodamina B é atrativa às aves silvestres, as quais consomem estas sementes, resultando em notável mortalidade durante o plantio. Um experimento realizado em campo agrícola no sudeste do Brasil mostrou que sementes camufladas foram menos removidas por aves silvestres do que sementes com rodamina B. A camuflagem foi potencializada em presença de irregularidades e serrapilheira no solo. Não houve remoção de sementes de cor azul, mas a formulação granular de cor azul tem causado mortalidade de aves nos USA e Canadá. Como sementes tratadas com agrotóxicos devem, de acordo com a legislação, receber coloração diferenciada para evitar acidentes com humanos, a camuflagem pode ser utilizada, substituindo a rodamina B.

  5. A hitherto unrecorded sighting of the Common Pochard Aythya ferina (Linnaeus, 1758 (Aves: Anseriformes: Anatidae in Vedanthangal Bird Sanctuary, Tamil Nadu, India

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    Samidurai Jayakumar

    2014-10-01

    Full Text Available The Common Pochard Aythya ferina (Linnaeus, 1758 (Aves: Anseriformes: Anatidae is recorded for the first time in Vedanthangal Bird Sanctuary, Tamil Nadu, India. As this species is recorded in other parts of Tamil Nadu, a brief sightings and distribution map is also specified.

  6. Ecología energética y nutricional en aves herbívoras pequeñas Energetics and nutritional ecology of small herbivorous birds

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    M. VICTORIA LOPEZ-CALLEJA

    2000-09-01

    Full Text Available La herbivoría en aves es una estrategia poco común. Solo el 3% de las aves actuales consumen plantas como fuente de energía. Tanto la composición química de las plantas como las restricciones asociadas al vuelo y digestión en aves pueden explicar el reducido número de pequeños endotermos, como las aves, que son herbívoros. Nuestro objetivo es explicar como las aves herbívoras satisfacen sus requerimientos nutricionales y energéticos cuando consumen dietas extremadamente pobres. Para lo cual nos centramos en Phytotoma rara (Phytotomidae, posiblemente el ave herbívora más pequeña. Phytotoma rara presenta numerosas características, como el rápido tiempo de transito, un efectivo rompimiento de la pared celular, y la alta y constante actividad de las enzimas digestivas, que le permiten disponer de nutrientes y energía celulares, sin los costos energéticos asociados al desarrollo de estructuras anatómicas de fermentación bacteriana o lentos tiempos de transito. Estos son posiblemente adaptaciones cruciales en la evolución de la herbivoría en aves pequeñas.Herbivory is a rare strategy in birds. Only 3% of extant birds exploit plant material as an energy source. Both plant chemical composition and bird constraints associated to flight and digestion may explain why herbivory is so scarce in small endotherms such as birds. Here we tackle the question of how herbivorous birds meet energy/nutrient requirements when feeding on extremely poor diets. We focus on Phytotoma rara (Phytotomidae, possibly the smallest herbivorous bird. From our mini-review we conclude that several features such as the fast passage rates, an effective physical breakdown of cell walls, and constant and high activities of digestive enzymes make available the highly nutritious cell contents to the small herbivore, without the energy costs of anatomical structures for bacterial fermentation or slow passage rates. These are possible crucial adaptations in the

  7. Osteological evidence for sister group relationship between pseudo-toothed birds (Aves: Odontopterygiformes) and waterfowls (Anseriformes)

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    Bourdon, Estelle

    2005-12-01

    The phylogenetic affinities of the extinct pseudo-toothed birds have remained controversial. Some authors noted that they resemble both pelicans and allies (Pelecaniformes) and tube-nosed birds (Procellariiformes), but assigned them to a distinct taxon, the Odontopterygiformes. In most recent studies, the pseudo-toothed birds are referred to the family Pelagornithidae inside the Pelecaniformes. Here, I perform a cladistic analysis with five taxa of the pseudo-toothed birds including two undescribed new species from the Early Tertiary of Morocco. The present hypothesis strongly supports a sister group relationship of pseudo-toothed birds (Odontopterygiformes) and waterfowls (Anseriformes). The Odontoanserae (Odontopterygiformes plus Anseriformes) are the sister group of Neoaves. The placement of the landfowls (Galliformes) as the sister taxon of all other neognathous birds does not support the consensus view that the Galloanserae (Galliformes plus Anseriformes) are monophyletic.

  8. Ruptura de sacos aéreos en aves ornamentales - Rupture of air bags in ornamental birds

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    Soto Piñeiro, Carlos J.

    2007-12-01

    Full Text Available Resumen En el siguiente trabajo se aborda la incidencia de rupturas de sacos aéreos en aves ornamentales así como el proceder mediante método quirúrgico y medicamentoso. Este trabajo fue realizado en la consulta Veterinaria de la Asociación Nacional Ornitológica de Cuba situada en Ciudad Habana durante los meses de Enero a Diciembre del año 2005. Abstract This study analyses the incidence of breakage of air sacks and its surgical and medical treatment in ornamental birds brought to the veterinary surgery of the Asociacion Nacional de Ornitologia de Cuba, at Havana city between January and December 2005.

  9. Pesca associada entre golfinhos e aves marinhas Feeding associations between dolphin and sea birds

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    Emygdio L. A. Monteiro-Filho

    1992-01-01

    Full Text Available Along ten years of study of a common dolphin from the brazilian coast, Sotalia brasiliensis Van Beneden, 1874, I could see some occasions of feeding associations of this dolphin with five species of birds, Sula leucogaster (Boddaert, 1783, Fregata magnificens Mathews, 1914, Sterna hirundinacea Lesson, 1831, Larus dominicanus Lichtenstein, 1823 and Phalacrocorax olivaceus Humboldt, 1895. The commonest association observed was between the dolphin and S. leucogaster, and in all the associations was characterized the commensalism, with advantaged to the birds.

  10. Pesca associada entre golfinhos e aves marinhas Feeding associations between dolphin and sea birds

    OpenAIRE

    Emygdio L. A. Monteiro-Filho

    1992-01-01

    Along ten years of study of a common dolphin from the brazilian coast, Sotalia brasiliensis Van Beneden, 1874, I could see some occasions of feeding associations of this dolphin with five species of birds, Sula leucogaster (Boddaert, 1783), Fregata magnificens Mathews, 1914, Sterna hirundinacea Lesson, 1831, Larus dominicanus Lichtenstein, 1823 and Phalacrocorax olivaceus Humboldt, 1895. The commonest association observed was between the dolphin and S. leucogaster, and in all the associations...

  11. New bird records for Cozumel Island found in scientific collections Nuevos registros de aves para la Isla Cozumel encontrados en colecciones científicas

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    Tania Macouzet

    2013-03-01

    Full Text Available We report here 4 new bird records found among a large-scale compilation of specimen records in museums worldwide, Atlas de las Aves de Mexico. The new records are for 4 migratory species, Empidonax alnorum (Alder Flycatcher, Vireo solitarius (Solitary Vireo, Catharus fuscescens (Veery, and Zonotrichia leucophrys (White-crowned Sparrow. These species are not to-date known from Cozumel, although they are considered transients in the Yucatán Peninsula.Se encontraron 4 nuevos registros de especies de aves para la Isla Cozumel obtenidos a través del análisis de un compendio de registros de ejemplares de aves depositados en los museos del mundo, Atlas de las Aves de México. Las especies encontradas fueron Empidonax alnorum (mosquero ailero, Vireo solitarius (vireo cabeza azul, Catharus fuscescens (zorzal rojizo y Zonotrichia leucophrys (gorrión corona blanca. Para estas especies no se tenían registros en la Isla Cozumel aunque se consideran migratorias "de paso" en el área de la península de Yucatán.

  12. Aves en ambientes marinos y salinos: viviendo en hábitats secos Birds in marine and saline environments: living in dry habitats

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    PABLO SABAT

    2000-09-01

    Full Text Available Para las aves, ambientes salobres como los marinos y los salares, son en la práctica hábitats secos. Cuando las aves beben agua o consumen presas saladas, sus fluidos corporales aumentan la osmolaridad. Para mantener el equilibrio osmótico, las aves tienen que eliminar el exceso de electrolitos ingerido en los alimentos y el agua. Las estrategias adaptativas utilizadas por las aves marinas incluyen la utilización de la glándula de la sal, la cual produce soluciones de excreción más concentradas que el agua de mar. Tanto la fisiología y la plasticidad de la glándula nasal se correlaciona con las características ecológicas de las especies. Además, las aves pueden minimizar el estrés osmótico escogiendo presas hipo-osmóticas, o con menor contenido de agua, disminuyendo de este modo la ingestión de sales. Aun cuando la capacidad de concentración de la orina del riñón de aves es limitada, existen diferencias interespecíficas en su estructura y fisiología, lo que representa un mecanismo adaptativo para evitar la pérdida de agua. Este órgano es particularmente importante en aquellos taxa que no poseen la glándula de la sal, como paseriformes. Sin embargo, estas aves que aparentemente poseerían una restricción fisiológica para explotar ambientes salobres, incluyen algunas especies que habitan costas oceánicas y de salares. En esta revisión muestro que la interacción funcional del riñón y el intestino grueso en la fisiología osmoregulatoria, junto con la conducta de alimentación juegan un papel crucial en la mantención del balance hídrico y en la adaptación de estas especies a ambientes salobresFor birds, saline environments such as maritime and salt marsh habitats are essentially dry habitats. When birds drink saline water or consume salt-loaded preys, the osmolarity of their body fluids increases. In order to maintain the osmotic equilibrium, they have to eliminate the excess of electrolytes ingested with preys or

  13. Phylogeny and evolutionary history of Old World suboscine birds (Aves: Eurylaimides)

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    Moyle, R.G.; Chesser, R.T.; Prum, R.O.; Schikler, P.; Cracraft, J.

    2006-01-01

    Molecular and morphological data were used to derive a phylogenetic hypothesis for the Eurylaimides, an Old World bird group now known to be distributed pantropically, and to investigate the evolution and biogeography of the group. Phylogenetic results indicated that the Eurylaimides consist of two monophyletic groups, the pittas (Pittidae) and the broadbills (Eurylaimidae sensu lato), and that the broadbills consist of two highly divergent clades, one containing the sister genera Smithornis and Calyptomena, the other containing Pseudocalyptomena graueri, Sapayoa aenigma, the asity genera Philepitta and Neodrepanis, and five Asian genera. Our results indicate that over a ~10 million year time span in the early Tertiary, the Eurylaimides came to inhabit widely disjunct tropical regions and evolved disparate morphology, diet, and breeding behavior. Biogeographically, although a southern origin for the lineage is likely, time estimates for major lineage splitting do not correspond to Gondwanan vicariance events, and the biogeographic history of the crown clade is better explained by Laurasian climatic and geological processes. In particular, the timing and phylogenetic pattern suggest a likely Laurasian origin for the sole New World representative of the group, Sapayoa aenigma.

  14. Arbovírus Ilheus em aves silvestres (Sporophila caerulescens e Molothrus bonariensis Ilheus arbovirus in wild birds (Sporophila caerulescens and Molothrus bonariensis

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    Luiz Eloy Pereira

    2001-04-01

    Full Text Available OBJETIVO: Relatar o isolamento do vírus Ilheus no Estado de São Paulo e avaliar o seu impacto para a saúde pública. MÉTODOS: O isolamento de vírus foi realizado em camundongos albinos Swiss, a partir de sangue de aves silvestres, capturadas com redes de espera tipo mist net, armadas no nível do solo, no Parque Ecológico do Tietê, São Paulo. A identificação das cepas isoladas foi feita pelos testes de inibição da hemaglutinação, fixação de complemento e neutralização em camundongos. Amostras de plasma de aves e de mamíferos silvestres foram submetidas à pesquisa sorológica para detecção de anticorpos inibidores de hemaglutinação. RESULTADOS: Foram isoladas duas cepas do vírus Ilheus em sangue de aves das espécies Sporophila caerulescens e Molothrus bonariensis e detectados anticorpos em aves das espécies Columbina talpacoti, Geopelia cuneata, Molothrus bonariensis e Sicalis flaveola, em sagüis das espécies Callithrix jacchus e Callithrix penicillata e no quati Nasua nasua. CONCLUSÕES: O isolamento do vírus Ilheus e a detecção de anticorpos específicos em aves residentes, migratórias e de cativeiro, em sagüis e quatis, comprovam a presença desse agente no Parque Ecológico do Tietê. O comportamento migratório de aves silvestres pode determinar a introdução do vírus em outras regiões. Considerando-se a patogenicidade para o homem e a confirmação da circulação desse agente viral em área urbana, freqüentada para atividade de lazer e de educação, o risco de ocorrência de infecção na população humana não pode ser descartado.OBJECTIVE: To report the first Ilheus arboviruses isolated from wild birds and analyze its public health impact. METHODS: Wild birds and mammals were captured using mist nets and Tomahawk traps, respectively. Blood samples were drawn from these animals and inoculated intracerebrally in Swiss suckling mice found in the Parque Ecológico do Tietê, Brazil. The isolates were

  15. Ticks on birds caught on the campus of the Federal Rural University of Rio de Janeiro, Brazil Carrapatos em aves capturadas no campus da Universidade Federal Rural do Rio de Janeiro, Brasil

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    Ísis Daniele Alves Costa Santolin

    2012-09-01

    Full Text Available The prevalence of parasitic infections, particularly those caused by ectoparasites, may influence the biology and ecology of wild birds. The aim of this study was to investigate occurrences and identify the species of ticks collected from wild birds caught on the campus of the Federal Rural University of Rio de Janeiro. The birds were caught using mist nets between October 2009 and December 2010. In total, 223 birds were caught, represented by 53 species and 19 families in nine orders. Nineteen birds (n = 7 species were parasitized by immature ticks (prevalence of 8.5%. Forty-four ticks were collected, of which 23 were nymphs and 21 were larvae. There were associations between parasitism by ticks and non-Passeriformes birds, and between parasitism and ground-dwelling birds, which was possibly due to the presence (or inclusion among the captured birds of Vanellus chilensis (Charadriiformes: Charadriidae. All the nymphs collected were identified as Amblyomma cajennense. In general terms, we must emphasize that wild birds in the study area may play the role of dispersers for the immature stages of A. cajennense, albeit non-preferentially.A prevalência das infecções parasitárias e em particular, aquelas causadas por ectoparasitos, pode influenciar na biologia e ecologia das aves silvestres. O objetivo do estudo foi investigar a ocorrência e identificar as espécies de carrapatos coletadas em aves silvestres capturadas no campus da Universidade Federal Rural do Rio de Janeiro. As aves foram coletadas em rede-de-neblina durante o período de outubro de 2009 a dezembro de 2010. No total foram capturadas 223 aves representadas por 53 espécies, 19 famílias em 9 ordens. Parasitismo por formas imaturas de carrapatos, foram encontradas em 19 aves (n = 7 espécies correspondendo a uma prevalência de 8,5%. Foram coletados 44 carrapatos onde 23 estavam em estágio de ninfa e 21 em estágio de larva. Houve associação entre o parasitismo por carrapatos

  16. Utilización del adhesivo tisular Vetacryl en cirugía de aves ornamentales (Use of adhesive tisular vetacryl in surgery de ornamental birds

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    Soto Piñeiro, Carlos Jesús.

    2007-12-01

    Full Text Available Resumen La utilización de suturas en la cirugía veterinaria ornitológica muchas veces se ve dificultada por la adquisición e materiales adecuados, y la retirada de estos por los propios pacientes a los que se les aplica, motivando la colocación en muchos casos de elementos de contención para que no puedan retirarse estos puntos. En el presente trabajo se realiza una incursión con la utilización de un nuevo adhesivo tisular VETACRYL producido por El Centro e Biomateriales de la universidad de la Habana en diversas intervenciones quirúrgicas realizadas a aves ornamentales, realizadas en la consulta veterinaria de la Asociación Nacional Ornitología de Cuba, en un periodo comprendido desde el mes de Enero a Julio del 2003. Pudiéndose constatar las ventajas que tiene este material y su posible utilización en aves ornamentales. Summary The use of sutures in the avian surgery it is some times hindered by the acquisition of appropriate materials, and the retreat of these by the birds patients to those that are applied, motivating the placement in many cases of contention elements so that they cannot retire these points. In this work we evaluated the use of a new tissue adhesive (VETACRYL - made by The Centro de Biomateriales of the Havana University in 133 surgical interventions carried out in the skin of ornamental birds, assisted in the veterinary center of the Ornithology National Association of Cuba, from January to July 2003. Being able to verify the advantages that this material was for the easy application, with a well bird tolerance and the hemostatic capacity, important factor when working in animals with so low volemia.

  17. Nitrógeno dietario como un nutriente limitante en aves frugívoras Dietary nitrogen as a limiting nutrient in frugivorous birds

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    BOSQUE CARLOS

    2000-09-01

    las complejas interacciones involucradas en la regulación de las necesidades proteicas de las aves frugívorasFruit pulp is considered nutritionally inadequate for frugivorous birds because of its low protein content. Consequently, frugivores are expected to minimize their nitrogen losses as an adaptation to frugivory . In this review we examine properties of fruit and physiological traits of frugivores that affect their ability to subsist on fruit diets. Most tropical and temperate fruit seem to contain enough nitrogen to satisfy bird’s requirements if their food intake was adjusted to meet their energy needs, but requirements depend on body mass. Birds of larger body size should require foods having a higher ratio of nitrogen to energy than smaller species. However, digestible nitrogen may in fact be limiting because fruit pulp seems to contain considerable amounts of nonproteinaceous nitrogen and an amino acid composition that deviates from that required by birds. Both of these characteristics of fruit pulps should augment nitrogen losses of frugivores and consequently their needs when consuming natural diets. In terms of their physiology, we expect frugivores to maximize their nitrogen extraction efficiency from the diet and hint the possibility that low urinary nitrogen losses of frugivores might be related to a low metabolic rate. Minimization of endogenous fecal losses could be the most important adaptation of frugivores to subsist on nitrogen poor diets. It is not evident how specialized frugivores can have lower than expected nitrogen requirements when compared to birds of other dietary groups. We suggest several areas of research that should improve our understanding of the complex interactions involved in the regulation of protein needs of frugivorous birds

  18. Comunidade de aves da Reserva Estadual de Gurjaú, Pernambuco, Brasil Bird communities of the Gurjaú Reserve, Pernambuco State, Brazil

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    Rachel Maria de Lyra-Neves

    2004-09-01

    Full Text Available Estudos quali-quantitativos foram realizados em um fragmento florestal da Reserva Estadual de Gurjaú, Cabo de Santo Agostinho, Pernambuco, Brasil. Foram registradas 220 espécies de aves no levantamento qualitativo. Através da contagem por pontos, foram identificadas 175 espécies em 6.470 contatos (270 amostras. A freqüência de ocorrência de 75% foi registrada para 43 espécies (19,6%; para a maioria das espécies a freqüência de ocorrência esteve abaixo de 25%.A qualitative and quantitative bird surveys were carried out in a forest fragment in Gurjau Reserve, Santo Agostinho Cape, Pernambuco State, Brazil. By qualitative census were registered 220 different bird species. Concerning the point counts, were identified 175 different species in 6.470 contacts (270 samples. A frequency of occurrence of 75% was registered for 43 species (19,6%; the most part of species had a frequency of occurrence below 25%.

  19. REGISTRO DE CINCO ESPECIES DE AVES POCO CONOCIDAS PARA NORTE DE SANTANDER, COLOMBIA Five Bird Species Poorly Known for Norte de Santander, Colombia

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    LUIS ORLANDO ARMESTO

    2013-04-01

    Full Text Available Registramos cinco especies de aves poco conocidas para la región con base en observaciones realizadas en el área urbana de Cúcuta (departamento de Norte de Santander, Colombia. Dos de ellas son migratorias neárticas/neotropicales (Coccyzus americanus y Protonotaria citrea. Aunque cuatro especies ya habían sido recolectadas en Cúcuta, han pasado inadvertidas para esta región. Uno de los registros corresponde a la ampliación hacia el norte del área de distribución geográfica conocida para Paroaria nigrogenis.We report five bird species poorly known for Norte de Santander based on observations in the urban area of the city of Cúcuta (department of Norte de Santander, Colombia. Two are nearctic/neotropical migratory birds (Coccyzus americanus and Protonotaria citrea. Although four species had been collected before in Cúcuta, their report has remained unnoticed. We record the geographical range extension for Paroaria nigrogenis to the north of its currently known distribution.

  20. El ave mascota: desde el criadero a la pet-shop - de la pet-shop a la casa - The pet-bird: from the breeding centre to the pet-shop. From the pet- shop to home

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    Dra Elena Bert.

    2011-02-01

    Full Text Available ResumenConocer cuales son los factores que más afectan al ave de jaulaen su recorrido de vida desde el criadero hasta el hogar donde serámantenida como ave mascota, cuales pueden ser las principales patologías detectadas en ese transito y como evitarlas, es el objetivo de este articulo que intenta lograr se establezcan normativas que permitan mantener integra la salud y el bienestar de las aves, desde el criadero hasta la casa.SummaryIn this article we evaluate the factors that can affect the birds ofcage in the breeding farm, as well as in the pet-shop, where they will be kept as pet birds. We expose the main pathologies that can emerge in the birds during the transportation or caused by the habitat changes. We suggest some measures to detect and control clinical signs, and we try to establish some regulations to guarantee the health and wellness of the birds from the breeding centre to home.

  1. Nuevos registros de piojos (Insecta: Phthiraptera en aves domésticas y ornamentales en Chile New records of lice (Insecta: Phthiraptera from domestic and ornamental birds from Chile

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    D González-Acuña

    2009-01-01

    Full Text Available Por medio del examen del plumaje de aves domésticas y ornamentales en Chile se reconfirma la presencia de los phthiraptera Menopon gallinae, Goniodes gigas, Goniocotes gallinae y Menacanthus stramineus en la gallina doméstica, Gallus gallus domesticus y se registra además por primera vez en el país la especie Menacanthus pallidulus. En aves ornamentales se registran en pavo, Meleagris gallipavo, la especie M. stramineus, en pavo real, Pavo cristatus las especies Goniodes pavonis y Amrysidea minuta, en faisán común Phasianus colchicus las especies Goniocotes chrysocephalus y Oxylipeurus colchicus y en ganso doméstico Anser anser las especies Anaticola anseris y Trinoton anserinum. Los siete registros realizados en aves ornamentales representan nuevos reportes para Chile.The objective of this study was to confirm and update previous records of Phthiraptera in domestic and ornamental birds of Chile, through the examination of the plumage of the birds. The presence of Menopon gallinae, Goniodes gigas, Goniocotes gallinae and Menacanthus stramineus species on the domestic fowl Gallus gallus domesticus was confirmed, and the Menacanthus pallidulus is reported for the first time in Chile. In ornamental birds, seven species of lice were reported for the first time in Chile: M. stramineus in wild Turkey (Meleagris gallopavo, Goniodes pavonis and Amrysidea minuta in the Indian Peafowl, Goniocotes chrysocephalus and Oxylipeurus colchicus in the Common Pheasant (Phasianus colchicus, and Anaticola anseris and Trinoton anserinum in the Greylag Goose (Anser anser.

  2. Prevention of Salmonella infection by contact using intestinal flora of adult birds and/or a mixture of organic acids Controle da transmissão de Salmonella por contato entre aves de exploração comercial pelo uso de flora intestinal de aves adultas e/ou uma mistura de ácidos orgânicos

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    Gláucia Helaine de Oliveira

    2000-06-01

    Full Text Available This study was carried out to assess the ability of competitive exclusion and a mixture of organic acids to prevent Salmonella infection by contact between newly hatched chicks. A bird infected with Salmonella was placed in a box containing non-infected birds, previously treated with a broth culture of faeces of adult birds (CE and/or a mixture of organic acids. The number of Salmonella organisms in the caeca of the contact birds was estimated at 4 and 8 days post-challenge. The birds were infected with Salmonella Typhimurium, Salmonella Enteritidis (both repeated 5 times, Salmonella Agona and Salmonella Infantis (3 repetitions. The same approach was used to test the mixture of organic acids alone. In this case the birds received feed containing 0.8% of a mixture of formic acid (70% and propionic acid (30%. Also, a third trial was carried out with birds inoculated with the broth culture of faeces and fed with feed containing the mixture of organic acids. Appropriate controls were included. Whereas the birds from the control groups and the groups treated with the mixture of organic acids were heavily infected with Salmonella, those pre-treated with CE or CE plus the mixture of organic acids had no viable cells per gram of caecal contents.O presente trabalho avaliou a prevenção da disseminação de quatro sorotipos de Salmonella, de interesse em avicultura e saúde pública (Salmonella Typhimurium, Salmonella Agona, Salmonella Infantis e Salmonella Enteritidis, entre aves recém-nascidas, com o intuito de diminuir a disseminação de salmonelas em rebanhos avícolas por aves que contraíram a infecção pela via vertical. Analisou-se experimentalmente a administração de microbiota intestinal de aves adultas em aves recém-nascidas, a incorporação de uma mistura de ácidos orgânicos na ração e a associação desses dois tratamentos, em grupos onde colocou-se uma ave infectada, para provocar a transmissão por contato. A microbiota

  3. Valoraciones clínicas de los problemas respiratorios en las aves ornamentales - Clinical evaluations of the respiratory problems in ornamental birds

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    Dr. Carlos J. Soto Piñeiro.

    2010-11-01

    Full Text Available ResumenEn el presente artículo se intenta abordar luego de un recorrido anatomo fisiológico por el sistema respiratorio aviar, las diferentes afecciones que pueden alterar el tracto respiratorio de aves ornamentales. Dividiendo el tracto respiratorio en superior e inferior y detallando las diversas manifestaciones clínicas de acuerdo a la región, tipo de agente etiológico actuante y alteraciónprovocada. Se intenta además describir las pruebas diagnósticas necesarias y su interpretaciones para llegar a un diagnostico de certeza, así como el tratamiento sugerido para cada patología.SummaryIn the present article we tried to approach the different respiratory disorders of the ornamental birds, after a description of the physiology and anatomy of the respiratory tract. We divided the respiratory tract in upper and lower and describe the diverse clinical manifestations according to the region, aetiology and pathology. We also describe the diagnostic tools and their nterpretations to achieve a definitive diagnosis, as well as the treatments suggested for the different respiratory diseases.

  4. Digenean parasites of Ciconiiform birds from Argentina Digéneos parásitos de aves Ciconiiformes de Argentina

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    Fabiana B. Drago

    2011-03-01

    Full Text Available The helminthological survey of 13 specimens of 5 ciconiiform species revealed the presence of 10 species of intestinal digeneans: Sphincterodiplostomum musculosum Dubois, 1936 in Tigrisoma lineatum and Ardea alba; Tylodelphys elongata (Lutz, 1928 in T. lineatum; Apharyngostrigea ardearum (Lutz, 1928 and Dolichorchis lacombeensis Lunaschi and Drago, 2006 in Ardea cocoi and Ardea alba; Posthodiplostomum nanum Dubois, 1937 in A. alba and T. lineatum; Ascocotyle diminuta (Stunkard and Haviland, 1924 in A. alba; Petasiger sp.1 in A. cocoi and Paryphostomum segregatum Dietz, 1909, Strigea vaginata (Brandes, 1888 and Petasiger sp. 2 in Coragyps atratus. Syrigma sibilatrix was free of digeneans. The reports of A. ardearum, T. elongata, S. musculosum and D. lacombeensis represent new host records; the other reports are new geographical records. Moreover, the specimens described as Apharyngostrigea brasiliana Szidat, 1929 by Labriola and Suriano (1998 were analyzed and transferred to A. ardearum.El estudio parasitológico de 13 ejemplares pertenecientes a 5 especies de aves Ciconiiformes reveló la presencia de 10 especies de digéneos intestinales: Sphincterodiplostomum musculosum Dubois, 1936 en Tigrisoma lineatum y Ardea alba; Tylodelphys elongata (Lutz, 1928 en T. lineatum; Apharyngostrigea ardearum (Lutz, 1928 y Dolichorchis lacombeensis Lunaschi y Drago, 2006 en Ardea cocoi y A. alba; Posthodiplostomum nanum Dubois, 1937 en A. alba y T. lineatum; Ascocotyle diminuta (Stunkard y Haviland, 1924 en A. alba; Petasiger sp.1 en A. cocoi y Paryphostomum segregatum Dietz, 1909, Strigea vaginata (Brandes, 1888 y Petasiger sp. 2 en Coragyps atratus. Syrigma sibilatrix no se encontró parasitada por digéneos. El presente estudio aporta nuevos registros de hospedadores para A. ardearum, T. elongata, S. musculosum y D. lacombeensis y nuevos registros geográficos para las restantes especies. Además, los organismos descritos como Apharyngostrigea brasiliana

  5. Camouflaging of seeds treated with pesticides mitigates the mortality of wild birds in wheat and rice crops Camuflagem de sementes tratadas com pesticidas mitiga a mortalidade de aves silvestres em plantações de trigo e arroz

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    Alexandre de Almeida

    2010-04-01

    Full Text Available Seeds used to plant wheat, corn and rice crops in Brazil are treated with the insecticide carbofuran associated with the dye rhodamine B, attracting granivorous birds and causing mortality during sowing. The objective of this study was to evaluate if using camouflaged seeds can minimize mortality caused by the ingestion of seeds with carbofuran. Alternatives for reducing mortality, such as using carbofuran without rhodamine B or replacing carbofuran by carbosulfan, were compared. Three experiments were carried out in regions of known bird mortality in the states of Paraná and São Paulo, Brazil, using conventional sowing over plowed soil in the traditional planting system, 15,896 kg of seeds in 111.46 ha. Bird carcasses were collected and dissected to unveil which poisoned seed treatments had caused birds' deaths. The mortality mounted to 296 birds of 11 species. Eared doves were the most numerous casualties (263. There was significant correlation between mortality and number of consumed seeds. The consumption of camouflaged seeds was lower than that of commercial seeds treated with rhodamine B. The mortality caused by seeds with both rhodamine B and carbofuran was higher than mortality caused by seeds camouflaged only with carbofuran. The replacement of carbofuran with carbosulfan also seemingly reduced mortality, but carbosulfan mortality might have been underestimated as a result of the apparent movement of affected birds after exposure. Seeds treated with carbofuran and rhodamine B and without any dye, were attractive. Because legal requirement for seeds treated with pesticides to be differentiated by dying, the substitution of rhodamine B by camouflaging must be encouraged.Plantações de trigo, milho e arroz no Brasil utilizam sementes tratadas com o inseticida carbofuran, associado ao corante rodamina B, que é atrativo às aves granívoras, causando notável mortalidade durante o plantio. O objetivo deste estudo foi avaliar se sementes

  6. Patrones de presencia y abundancia de aves terrestres en la isla Saliaca, Sinaloa, México Patterns of occurrence and abundance of land birds on Saliaca Island, Sinaloa, Mexico

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    José Alfredo Castillo-Guerrero

    2009-04-01

    Full Text Available Se determinó la abundancia y composición taxonómica de las aves terrestres en la Isla Saliaca, Sinaloa, México, mediante puntos de conteo en 3 periodos de muestreo (verano, otoño e invierno y 3 tipos de hábitat (bosque espinoso, manglar y duna. Se observaron 82 especies, un número más alto que el registrado para cualquier otra isla del golfo de California. La riqueza y abundancia fueron mayores en otoño (59 especies, 9.2 ± 1.2 aves por punto e invierno (48 y 7.5 ± 0.9 que en verano (33 y 5.2 ± 0.3; este patrón refleja el arribo de aves migrantes neotropicales. En cuanto a los tipos de hábitat, la mayor riqueza y abundancia se encontró en el bosque espinoso (60 especies y 9.3 ± 0.9 aves por punto, seguida por manglar (16 y 3.3 ± 0.8 y duna (3 y 1.0 ± 0.2, lo cual es acorde con la estructura vegetal más compleja y la área de cobertura mayor del bosque espinoso. La isla Saliaca puede representar un relicto del hábitat costero regional, por lo que es importante su protección y conservación.We determined the abundance and taxonomic composition of land-birds in Saliaca Island, Sinaloa, Mexico, by means of point counts during 3 sampling periods (summer, autumn and winter and 3 types of habitat (thorn forest, mangrove and dune. We observed 82 species, which is greater than the number reported for any other Island of the Gulf of California. The species richness and abundance were greater in autumn (59 species and 9.2 ± 1.2 birds per point count and winter (48 and 7.5 ± 0.9 than in summer (33 and 5.2 ± 0.3, a pattern resulting from the arrival of neotropical migrants. With regard to differences by habitat, the greatest richness and abundance occurred in the thorn forest (60 species and 9.3 ± 0.9 birds per point, followed by mangrove (16 and 3.3 ± 0.8 and dune (3 and 1.0 ± 0.2, which is agreement with the higher complexity of vegetation structure and the greater area of thorn forest. Saliaca Island could represent a relict of

  7. Efeitos da fragmentação florestal sobre as comunidades de aves - DOI: 10.4025/actascibiolsci.v25i2.2030 Effects of forest fragmentation on bird communities

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    Luiz dos Anjos

    2003-04-01

    Full Text Available Este trabalho discute os efeitos da fragmentação florestal sobre as comunidades de aves verificados em diversos estudos, e apresenta considerações para a conservação da avifauna. Os principais fatores ambientais determinantes da riqueza de aves em florestas e que são alterados no processo de fragmentação são a área florestal, o grau de isolamento, a diversidade de hábitats e o efeito de borda. Os diversos estudos diferiram em seus resultados em relação aos efeitos da fragmentação sobre a avifauna, mas alguns padrões são notáveis: 1. extinção seletiva de espécies nos fragmentos (há grupos mais susceptíveis ou mais resistentes ao processo, enquanto outros são até beneficiados; 2. densidade compensatória (aumento na densidade de algumas espécies em relação a sua densidade em florestas contínuas. Os resultados levam à conclusão de que para uma plena conservação da comunidade de aves florestais de uma região é necessária a conservação das grandes florestas, ao invés de diversos fragmentos pequenosEffects of forest fragmentation on bird communities and considerations for avifauna conservation are discussed here. Forest area, isolation, habitat diversity, and edge effect are the main environmental factors that determine bird richness in forests, and they undergo alterations during forest fragmentation. Several studies have shown different results regarding to fragmentation effects on the avifauna, and some of them are noticeable, such as: (1 selective extinction within the fragments, i. e., some groups are more susceptible than others to the process and some other groups are even benefited by fragmentation; (2 compensatory density, meaning that there is a density increase of some species in relation to their density in continuous forests. It has been enforced that it is necessary to preserve large extensions of forests instead of preserving several small fragments

  8. Valoraciones clínicas de los problemas respiratorios en las aves ornamentales - Clinical evaluations of the respiratory problems in ornamental birds

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    Dr. Carlos J. Soto Piñeiro; Dra. Elena Bert

    2010-01-01

    ResumenEn el presente artículo se intenta abordar luego de un recorrido anatomo fisiológico por el sistema respiratorio aviar, las diferentes afecciones que pueden alterar el tracto respiratorio de aves ornamentales. Dividiendo el tracto respiratorio en superior e inferior y detallando las diversas manifestaciones clínicas de acuerdo a la región, tipo de agente etiológico actuante y alteraciónprovocada. Se intenta además describir las pruebas diagnósticas necesarias y su interpretaciones para...

  9. Vírus da doença de Newcastle em aves não vacinadas no Estado do Rio de Janeiro Serology for the Newcastle disease virus in non vaccinated birds in the State of Rio de Janeiro, Brazil

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    Jorge Granja de Oliveira Junior

    2003-04-01

    Full Text Available O vírus da doença de Newcastle (VDN tem sido isolado na maioria das espécies de aves de vida livre e doméstica em todo o mundo. O comércio internacional de aves deve ser considerado como um fator importante na disseminação da doença. Infecções naturais e experimentais já foram demonstradas em, pelo menos, 236 espécies de aves. Portanto, aves silvestres livres ou cativas, e aves domésticas não vacinadas, podem atuar como reservatório para o VDN. Para analisar esta hipótese, aves do Zoológico Municipal do Rio de Janeiro e de propriedades particulares nos municípios de Seropédica, Japeri, Paulo de Frontin, Paracambi, Valença, Barra do Piraí, Rio de Janeiro e Nova Friburgo tiveram sangue coletado para detecção de anticorpos para VDN. Um painel de 837 plasmas foi obtido, no período de agosto de 1998 a julho de 2001, e analisado pelo teste de inibição da hemaglutinação (HI, dos quais 12 foram soropositivas (1,43% para o VDN, indicando prévio contato das aves com o patógeno.The Newcastle disease virus (NDV has been isolated in most of the species of free and domestic life all over the world. The international trade of birds should be considered as an important factor of disease spread. Natural and experimental infections were already demonstrated in, at least, 236 species of birds. Therefore, wild, free or captive, and non vaccinated domestic birds can act as reservoir for VDN. To analyze this hypothesis, birds from the municipal Zoo of Rio de Janeiro and from private properties in the municipal districts of Seropédica, Japeri, Paulo de Frontin, Paracambi, Valença, Barra do Piraí, Rio de Janeiro and Nova Friburgo, RJ, Brazil had their blood collected and plasmas stored for detection of antibodies levels for VDN. A panel of 837 plasmas was obtained, in the period of August of 1998 to July of 2001, and analyzed by the hemaglutination inhibition (HI test, from which 12 were soropositives (1.43% for NDV, indicating the

  10. Doenças de aves selvagens diagnosticadas na Universidade Federal do Paraná (2003-2007 Diseases of wild birds diagnosed at the Federal University of Paraná, Brazil (2003-2007

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    Gizah G.C. Santos

    2008-11-01

    Full Text Available Dentre os 253 atendimentos realizados em aves selvagens entre agosto de 2003 a agosto de 2006 no Ambulatório de Animais Selvagens do Hospital Veterinário da Universidade Federal do Paraná, 45 casos (17,8% referiram-se a consultas à espécie Serinus canarius (canário-belga. Dentre as aves atendidas e suas respectivas ordens obteve-se uma maior ocorrência da ordem Psittaciforme. As enfermidades mais freqüentemente visualizadas foram as afecções traumáticas com 56 casos (22,13%. Destas, 17 animais (30,91% possuíam algum tipo de fratura, sendo a fratura rádio-ulnar a mais comum, com 17,65% de ocorrência. As outras moléstias mais relatadas foram a presença de ectoparasitos (12,50% e endoparasitos (10,68%, doenças respiratórias (10,42%, procedimentos preventivos (7,55%, afecções dermatológicas (6,51%, neoplasias (4,95%, afecções oftálmicas (4,43%, afecções gastrintestinais (3,91%, caquexia (3,39%, afecções neurológicas (2,86%, automutilação (2,86%, obesidade (2,34%, agressão por outros animais (1,56 %, doenças nutricionais (1,30%, retenção de ovo (1,04%, bouba aviária (0,78% e gota úrica (0,52%. Tendo em vista a alta prevalência de traumatismos e presença de ecto e endo parasitas que poderiam ser evitados se estivesse ocorrendo um manejo adequado com a ave, sugere-se a necessidade que o Médico Veterinário assuma um papel mais efetivo na Medicina Veterinária Preventiva buscando informar e debater questões referentes ao modo correto de alimentação, criação e manejo das aves, assim como também o esclarecimento acerca das questões referentes às zoonoses quando da consulta veterinária.From 253 wild birds attended at the Wild Animal Ambulatory of the Veterinary Hospital, Paraná Federal University, between August 2003 and August 2006, 45 cases (17.8% were related to the species Serinus canarius (Belgian Canary. Within these attended birds and its respective orders, most morbid conditions occurred with the

  11. Arbovírus Ilheus em aves silvestres (Sporophila caerulescens e Molothrus bonariensis) Ilheus arbovirus in wild birds (Sporophila caerulescens and Molothrus bonariensis)

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    Luiz Eloy Pereira; Akemi Suzuki; Terezinha Lisieux Moraes Coimbra; Renato Pereira Souza; Esther Luiza Bocato Chamelet

    2001-01-01

    OBJETIVO: Relatar o isolamento do vírus Ilheus no Estado de São Paulo e avaliar o seu impacto para a saúde pública. MÉTODOS: O isolamento de vírus foi realizado em camundongos albinos Swiss, a partir de sangue de aves silvestres, capturadas com redes de espera tipo mist net, armadas no nível do solo, no Parque Ecológico do Tietê, São Paulo. A identificação das cepas isoladas foi feita pelos testes de inibição da hemaglutinação, fixação de complemento e neutralização em camundongos. Amostras d...

  12. Ecological relationships between feather mites (Acari and wild birds of Emberizidae (Aves in a fragment of Atlantic Forest in northeastern Brazil

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    Lyra-Neves Rachel M. de

    2003-01-01

    Full Text Available The objective of this study was to investigate feather mites on birds of the Family Emberizidae, to collect data on the ecological ectoparasite-host relationship and infestation level. A sum of 94 birds of 9 species was captured at the Refúgio Ecológico Charles Darwin, Igarassú, Pernambuco, Brazil, from August 1996 to July 1997. Five genera of mites from the superfamily Analgoidea were identified: Analges Nitzsch, 1818; Mesalgoides Gaud & Atyeo, 1967; Pterodectes Robin, 1877; Proctophyllodes Robin, 1877 and Trouessartia Canestrini, 1899. Among the 94 birds examined, 92 (97,87% were infested. Regarding the prevalence, it was observed that the genera with higher percentage were, respectively, Pterodectes (88,04%, Proctophyllodes (56,52% and Trouessartia (45,65%.

  13. The integration of diet, physiology, and ecology of nectar-feeding birds La integración de la dieta, fisiología, y ecología en aves nectarívoras

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    TODD J. McWHORTER

    2000-09-01

    Full Text Available Balance between energy acquisition and expense is critical for the survival and reproductive success of organisms. Energy budgets may be limited by environmental factors as well as by animal design. These restrictions may be especially important for small endotherms such as hummingbirds, which have exceedingly high energy demands. Many nectar-feeding bird species decrease food intake when sugar concentration in food is increased. This feeding response can be explained by two alternative hypotheses: compensatory feeding and physiological constraint. The compensatory feeding hypothesis predicts that if birds vary intake to maintain a constant energy intake to match energy expenditures, then they should increase intake when expenditures are increased. Broad-tailed hummingbirds (Selasphorus platycercus and Green-backed fire crown hummingbirds (Sephanoides sephaniodes were presented with diets varying in energy density and exposed to various environmental temperatures. Birds decreased volumetric food intake in response to sugar concentration. However, when they were exposed to lower environmental temperatures, and hence increased thermoregulatory demands, they did not increase their rate of energy consumption and lost mass. These results support the existence of a physiological constraint to the energy budgets of hummingbirds. Digestive and peripheral organ function limitations may impose severe challenges to the energy budgets of these small endotherms, and therefore play a significant role in determining their distribution, ecology, and natural history.El balance entre la adquisición y el uso de energía es crítico para la reproducción y sobrevivencia. Los presupuestos energéticos de los organismos pueden estar limitados tanto por factores ambientales como por su fisiología. Estas restricciones pueden ser especialmente importantes para pequeños endotérmos como los colibríes (picaflores que tienen costos energéticos altos por unidad de masa

  14. Levantamento das aves marinhas no percurso Rio de Janeiro: Bahia (Brasil A survey of the marine birds in the route Rio de Janeiro: Bahía (Brazil

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    Elias Pacheco Coelho

    1990-12-01

    Full Text Available Marine birds were surveyed between Rio de Janeiro and Bahia, latitudes 24º44'S and 17º50'S, from July to September 1984. Sixteen species were recorded belonging to six families, with most sightings occurring between 24º44'S and 22º3$'S. Data suggest two distinct communities, the more southerly one is represented by Daption capense and the one further north by Puffinus gravis.

  15. A new species of pengornithidae (aves: enantiornithes from the lower cretaceous of China suggests a specialized scansorial habitat previously unknown in early birds.

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    Han Hu

    Full Text Available We describe a new enantiornithine bird, Parapengornis eurycaudatus gen. et sp. nov. from the Lower Cretaceous Jiufotang Formation of Liaoning, China. Although morphologically similar to previously described pengornithids Pengornis houi, Pengornis IVPP V18632, and Eopengornis martini, morphological differences indicate it represents a new taxon of the Pengornithidae. Based on new information from this specimen we reassign IVPP V18632 to Parapengornis sp. The well preserved pygostyle of the new specimen elucidates the morphology of this element for the clade, which is unique in pengornithids among Mesozoic birds. Similarities with modern scansores such as woodpeckers may indicate a specialized vertical climbing and clinging behavior that has not previously been inferred for early birds. The new specimen preserves a pair of fully pennaceous rachis-dominated feathers like those in the holotype of Eopengornis martini; together with the unique morphology of the pygostyle, this discovery lends evidence to early hypotheses that rachis-dominated feathers may have had a functional significance. This discovery adds to the diversity of ecological niches occupied by enantiornithines and if correct reveals are remarkable amount of locomotive differentiation among Enantiornithes.

  16. Feeding associations between capybaras Hydrochoerus hydrochaeris (Linnaeus (Mammalia, Hydrochaeridae and birds in the Lami Biological Reserve, Porto Alegre, Rio Grande do Sul, Brazil Associações alimentares entre capivaras (Hydrochoerus hydrochaeris (Linnaeus (Mammalia, Hydrochaeridae e aves na Reserva Biológica do Lami, Porto Alegre, Rio Grande do Sul, Brasil

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    Ana C. Tomazzoni

    2005-09-01

    Full Text Available Feeding associations between capybaras Hydrochoerus hydrochaeris (Linnaeus, 1766 and some bird species were registered in the Lami Biological Reserve, southern Brazil, through observations in a set of transects established in the five major vegetation types of the study area: shrubby and herbaceous swamps, wet grasslands, sandy grasslands and forests. Data included: date and time, vegetation type, bird species, number of individuals (birds and capybaras, type of prey consumed, foraging strategy of the birds and the behavior of the capybaras in relation to the presence of birds. Five species of birds were registered: Caracara plancus (Miller, 1777, Furnarius rufus (Gmelin, 1788, Machetornis rixosus (Vieillot, 1819, Milvago chimachima (Vieillot, 1816 and Molothrus bonariensis (Gmelin, 1789. The interactions were observed in the shrubby swamp (M. bonariensis, forest (C. plancus and wet grassland (F. rufus, M. rixosus, M. chimachima. The foraging strategies were: (1 use of the capybara as a perch, hunting from its back (M. rixosus, M. bonariensis; (2 use of the capybara as a beater, hunting in the ground (F. rufus, M. rixosus, M. bonariensis; (3 foraging in the skin of the capybara, by picking the ectoparasites (C. plancus, F. rufus, M. chimachima. Strategies (1 and (2 were employed to catch arthropods flushed from the vegetation. Sometimes, capybaras lay down and exposed the abdomen and lateral areas of their bodies to facilitate cleaning by M. chimachima, but the presence of other bird species seemed to be neutral to capybaras.Foram registradas associações alimentares entre capivaras Hydrochoerus hydrochaeris (Linnaeus, 1766 e aves na Reserva Biológica do Lami, sul do Brasil, por meio de observações em um conjunto de transecções estabelecidas nos cinco principais tipos de vegetação existentes na área: banhado arbustivo, banhado herbáceo, campo úmido, campo arenoso e mata. As informações coletadas foram: data, horário, tipo de vegeta

  17. Dispersión de semillas por aves en un paisaje de bosque mesófilo en el centro de Veracruz, México: Su papel en la restauración pasiva Seed dispersal by birds in a cloud forest landscape in central Veracruz, Mexico: Its role in passive restoration

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    IVETTE HERNÁNDEZ-LADRÓN DE GUEVARA

    2012-03-01

    las especies de semillas encontradas, el 59 % germinó en las excretas del 78 % de las especies de aves. Este trabajo muestra que en los bosques mesófilos de montaña las aves son agentes dispersores importantes de especies de plantas pertenecientes a bosques secundarios y también dispersores de algunas plantas del bosque primario, por ello son agentes que facilitan el proceso de sucesión forestal.Seed dispersal by birds may play a major role in the successful natural forest restoration process as birds can deposit pioneer and primary seeds species, thereby defining the recovery of plant community composition over time. In this study, seed ingestion and dispersion by frugivorous birds were analyzed as processes facilitating the restoration of tropical cloud montane forests in central Veracruz, Mexico. Birds were classified according to their affinity to the forest and their preference to a particular forest stratum, in order to determine whether these factors were related to the richness, abundance and diversity of ingested and dispersed seeds. We analyzed 93 fecal samples from 23 bird species. A total of 2699 seeds from 17 plant species were found in the fecal samples, the most abundant seed was from the shrub Conostegia xalapensis. We analyzed the correlation between seed size and beak size for the six most frequently captured bird species. We also evaluated the effect of bird ingestion on seed germination by performing two experiments, the first one using the total number of seeds found in fecal samples, and the second one using C. xalapensis seeds that were administered artificially to the birds and their germination compared with control seeds. We found significant differences among the ingested seed diversity indexes for the most commonly captured birds, which supports a differential seed consumption and dispersion. However, there were no significant differences of the seed abundance and richness between birds with different forest affinity or forest stratum

  18. Patrones biogeográficos de las aves de la península de Yucatán Biogeographical patterns of the Yucatán Peninsula birds

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    Gala Cortés-Ramírez

    2012-06-01

    Full Text Available Con el propósito de actualizar el conocimiento de la avifauna (residente, migratoria y endémica de la Península de Yucatán, se analizaron datos de distribución puntual y distribuciones potenciales obtenidas mediante modelos de nicho ecológico a partir de la información obtenida de colecciones científicas. Para examinar la similitud entre la avifauna, se utilizó un índice de distancia fenética y se estimó el número probable de especies que se distribuye en la región. El número de registros en la base de datos quedó conformado por la presencia de 436 especies de aves (de 440 estimadas, 5 de las cuales son endémicas de México y se distribuyen en isla Cozumel y en la parte norte de la península, donde se encuentran las zonas de mayor aridez, el bosque tropical seco y 17 especies cuasiendémicas que se distribuyen en el resto de la península. Se reconocieron 4 principales agrupamientos de similitud faunística; uno al norte, otro en el área central, uno más al sur de la península y el cuarto en isla Cozumel.We analyzed geographical distribution patterns for the resident, migratory and endemic birds of the Yucatán Peninsula, using data obtained in scientific collections and predicted distributional areas obtained by ecological niche models with the purpose of updating the knowledge about the birds of the area. We examined the similarity between the bird components using a phenetic distance index, and estimated the possible number of species distributed in the peninsula. We recorded the presence of 436 species (of 440 estimated with the information of database. Five species are endemic to Mexico and 17 quasiendemic. Mexican endemics are distributed in Cozumel Island and in the northwestern portion of the peninsula, in dryer areas with tropical dry forest. Quasiendemic species are distributed in the southeastern portion of the peninsula, mainly in areas with high humidity. Similarity analysis lead to the recognition of 4 major

  19. Ticks on birds in a forest fragment of Brazilian cerrado (savanna in the municipality of Uberlândia, State of Minas Gerais, Brazil Carrapatos de aves em um fragmento florestal de Cerrado, município de Uberlândia, Estado de Minas Gerais, Brasil

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    Graziela Virginia Tolesano-Pascoli

    2010-12-01

    Full Text Available This is a report of ticks species, parasite prevalence and infestation intensity of birds in a forest fragment (18º 56' 57" S and 48º 12' 14" W within the Brazilian cerrado (savanna, in the municipality of Uberlândia, State of Minas Gerais, Brazil. A total of 162 birds from 26 species were captured. One adult tick, 296 larvae and 67 nymphs were found on passerine birds. Of these, it was identified 31 larvae and 27 nymphs of Amblyomma longirostre, 17 nymphs of A. nodosum, one A. cajennense larvae and one male of Rhipicephalus sanguineus. All other ticks were identified as Amblyomma sp. larvae (n = 264 or nymphs (n = 26. Overall tick infestation intensity and prevalence were 4.32 ticks/infested bird and 52%, respectively. Sampling of host-seeking ticks on the ground within the forest during a two-year period showed only five Amblyomma sp. nymphs and one adult male of A. nodosum whereas a search for ticks on domestic animals (cattle, horses and dogs found Rhipicephalus (Boophilus microplus ticks. Although identification was possible in only 27% of bird ticks there seemed to be no correlation between environmental and domestic animal and bird infestation. It can be assumed that bird infestation may occur above the ground or at specific sites not sampled.Neste trabalho, são apresentadas as espécies de carrapatos em aves silvestres, sua prevalência e a intensidade de infestação em um fragmento florestal (18º 56' 57" S e 48º 12' 14" W do Cerrado, no município de Uberlândia, Estado de Minas Gerais. Foram capturadas 162 aves de 26 espécies, mas apenas as aves Passeriformes estavam infestadas. Nestas, foram encontrados um carrapato adulto, 67 ninfas e 296 larvas. Dentre os carrapatos foi possível a identificação de 31 larvas e 27 ninfas de Amblyomma longirostre, 17 ninfas de A. nodosum, uma larva de A. cajennense e um Rhipicephalus sanguineus macho. Todos os outros carrapatos foram classificados como larvas (n = 264 ou ninfas (n = 26 de

  20. Aves do Parque Nacional da Serra do Cipó: o Vale do Rio Cipó, Minas Gerais, Brasil The birds of "Parque Nacional da Serra do Cipó": the Rio Cipó valley, Minas Gerais, Brazil

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    Marcos Rodrigues

    2005-06-01

    Full Text Available Foi conduzido um levantamento de espécies de aves do Vale do alto Rio Cipó durante o período de maio de 1998 a novembro de 2002. A região está totalmente inserida em uma das unidades de conservação mais importantes do sudeste do Brasil, o Parque Nacional da Serra do Cipó, em Minas Gerais. O método utilizado foi o de observação direta ao longo de 'transectos', captura com redes e identificação a partir do uso de vocalizações. A riqueza de espécies foi estimada usando-se o método de 'jackknife'. Foram registradas 226 espécies de aves pertencentes a 43 famílias. Isso corresponde cerca de 27% das 837 espécies já registradas para o bioma do Cerrado. Foram capturados 2.249 indivíduos num total de 4.486,82 horas-rede, onde foram amostradas 119 espécies pertencentes a 23 famílias. A riqueza foi estimada em 239 ± 5 espécies. Constam nesta lista seis espécies endêmicas do Cerrado: Augastes scutatus (Temminck, 1824 (Trochilidae, Hylocryptus rectirostris (Wied-NeuWied, 1821 (Furnariidae, Antilophia galeata (Lichtenstein, 1832 (Pipridae, Cyanocorax cristatellus (Temminck, 1823 (Corvidae, Charitospiza eucosma (Oberholser, 1905, Saltator atricollis (Vieillot, 1817, e Porphyrospiza caerulescens (Wied-Neuwied, 1830 (Emberizidae. Ocorrem também três espécies quase-ameaçadas de extinção: Sarcoramphus papa (Linnaeus, 1758 (Cathartidae, Cypsnagra hirundinacea (Lesson, 1831 e Charitospiza eucosma (Emberizidae. O Vale do Rio Cipó abriga uma porção significativa da avifauna do Cerrado. Alguns dos habitat encontrados no Vale estão se tornando cada vez mais raros na região do Cerrado de todo o Brasil, como as matas ciliares e o sistema de lagoas temporárias ao longo dos rios. Mesmo as cachoeiras, habitat importante para várias espécies, vêm desaparecendo em outras regiões do Brasil. Nesse sentido, a região do Vale do Rio Cipó dentro Parque consolida um dos seus objetivos que é a conservação da biodiversidade.It is

  1. Biologia de aves capturadas em um fragmento de Mata Atlântica, Igarassu, Pernambuco, Brasil Biology of birds captured in an Atlantic Forest fragment at Igarassu, Pernambuco, Brazil

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    Vivyanne S. Magalhães

    2007-12-01

    Full Text Available Foram estudados alguns aspectos da biologia da avifauna do Refúgio Ecológico Charles Darwin, fragmento de 60 ha de Mata Atlântica, no município de Igarassu, Pernambuco. Objetivando obter informações acerca das espécies desse bioma, foram realizadas observações entre agosto de 1996 e julho de 1997 e capturas mensais utilizando redes de neblina, entre julho de 2003 e junho de 2004. Entre observações, capturas, recapturas e recuperações, foram registradas 151 espécies (31 famílias para a área, onde 456 aves (53 espécies/25 famílias foram capturadas com redes ornitológicas. Foram recuperadas 10 espécies (tempo de anilha de seis a oito anos. O número de capturas foi maior nos meses mais quentes. A maioria das espécies capturadas (52,8% teve freqüência de ocorrência menor que 25%, sendo Manacus manacus (Linnaeus, 1766, Arremon taciturnus (Hermann, 1783, Neopelma pallescens (Lafresnaye, 1853 e Turdus leucomelas Vieillot, 1818 as mais freqüentes. Houve correlação significativa entre as análises dos valores médios entre massa corpórea e sexo, dados biométricos (medidas da asa, tarso e diâmetro do tarso e sexo e entre mudas e estação do ano. O maior período com muda associada à placa de incubação foi de março a maio (pico em maio. Os resultados fortaleceram a imprevisibilidade dos efeitos das alterações ambientais na estrutura da comunidade de aves em longo prazo. Reforçam ainda que os desequilíbrios populacionais possam vir a aumentar as chances de extinção, sendo necessárias novas alternativas para a proteção da biodiversidade, sobretudo em fragmentos florestais.We carried out a study about the biology of the avifauna of Refúgio Ecológico Charles Darwin, a 60 ha fragment of Atlantic Forest in the town of Igarassu, Pernambuco. To obtain information about species of this bioma, observations were done between August, 1996 and July, 1997 and monthly captures using mist nets were conducted between July, 2003

  2. Comunidade de aves no Parque Estadual da Fonte Grande, Vitória, Espírito Santo, Brasil Birds of the Parque Estadual da Fonte Grande, Vitória, Espírito Santo, Brazil

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    José E. Simon

    2007-03-01

    Full Text Available O presente trabalho divulga a composição da comunidade de aves no Parque Estadual da Fonte Grande (PEFG, Vitória, Espírito Santo, com base em levantamentos de campo realizados entre janeiro e dezembro de 2003. Com um esforço de campo em torno de 450 horas, obtivemos um total de 120 espécies, distribuídas em 37 famílias. Pelo método Jackknife 1, estimou-se uma riqueza de 146 espécies (129 This paper provides the avifauna composition recorded between January and December 2003 in the Fonte Grande State Park (PEFG, municipality of Vitória, state of Espírito Santo, Brazil. We obtained a total of 120 species belonging to 37 families, after 450 hours of field work. We estimated a richness of 146 species (129 < IC(95% < 163, according to Jackknife 1 method. However, the species accumulation curve has not reached its assintotics. Four species out of 120 recorded are endemic to the Brazilian Atlantic Forest (Leucopternis lacernulatus, Phaethornis idaliae, Thamnophilus ambiguus and Attila rufus, and one of them (L. lacernulatus is included in the list of Brazilian birds threatened with extinction. The comparison among the three basic inventory methods (auditive, sightseeing and net capture revealed that the sightseeing method detected the largest number of species (x² = 17.55, p < 5%, of which 26 (22% were recorded exclusively by this method. This result is explained by the dominance of open landscape species in the Park, associated with the type of field work employed in this study.

  3. Distribución altitudinal de las aves en una zona prioritaria en Sinaloa y Durango, México Altitudinal distribution of birds in a priority area in Sinaloa-Durango, Mexico

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    Ma Nelle Medina-Macías

    2010-08-01

    Full Text Available En este estudio se documentan los patrones de riqueza de especies y endemismo con respecto a un gradiente altitudinal (300-2 800 m snm en la región del Espinazo del Diablo (estados de Durango y Sinaloa. Se registró un total de 209 especies de aves, que aunadas a los registros previos en literatura y colecciones conforman una lista regional de 229 especies. Los 3 métodos empleados para reconocer la existencia de asociaciones faunísticas a lo largo del gradiente - el fenograma de similitud, las curvas de atenuación y el análisis de TWINSPAN-, coincidieron en la existencia de 3 pisos altitudinales, por lo que se observa claramente que existe una división de la avifauna en el transecto. La zona reviste una gran importancia para la conservación de los recursos biológicos de México, pues además de contener el reducto de bosque montano húmedo más norteño del oeste de Mesoamérica, la avifauna también resulta importante tanto por su riqueza específica como por el endemismo y presencia de especies de especial interés.We document patterns of species richness and endemism in an elevational gradient (300 to 2 800 m located in the Espinazo del Diablo region (states of Durango and Sinaloa, as well as its significance for the conservation of the avifauna, that is a global priority due to the presence of endemic and highly endangered taxa. We recorded a total of 209 species of birds in the fieldwork, and adding the records from literature and collections, the list increases to 229 bird species in the area. The 3 methods used for recognizing faunistic assemblages along the elevational gradient -phenetic similarity analysis, faunal congruence curves, and TWINSPAN- recognized 3 altitudinal associations, 1 in the lowlands and 2 in the higher elevations, what represents a clear division of the avifauna. The area is a conservation priority in Mexico, because is the northernmost relict of cloud forest in Mesoamerica, and holds an extraordinary

  4. Comunidade de aves de sub-bosque em uma área de entorno do Parque Nacional do Itatiaia, Rio de Janeiro, Brasil Understory bird community in a surrounded area of Itatiaia National Park, Rio de Janeiro, Brazil

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    Eliana R. Maia-Gouvêa

    2005-12-01

    Full Text Available Este trabalho foi realizado em mata secundária no Município de Itatiaia, Estado do Rio de Janeiro (22º30'S e 44º30'W próximo ao Parque Nacional do Itatiaia, com o objeitvo de descrever a comunidade de aves ali presente. Foram amostrados três tipos vegetacionais distintos: reflorestamento, bosque e pomar, tendo sido realizadas 19 excursões entre 1984 e 1999. As aves foram amostradas através de capturas com redes de neblina e anilhamento, tendo sido utilizadas de 15 a 31 redes de 12 x 2 m e malha 36 mm. Foram também obtidas medidas morfométricas (comprimento total, asa, bico, cauda e tarso e dados biológicos (sexo, idade reprodução e muda. Depois de 5.621,79 horas-rede, foi registrado um total de 553 capturas, com 71 recapturas (12,84%; 417 indivíduos foram anilhados, e 65 beija-flores deixaram de ser marcados por falta de anilhas específicas. A comunidade estudada esteve representada por 77 espécies e 18 famílias, apresentando índice de diversidade H' = -1,594 e a curva do coletor com tendência à estabilização. As famílias com maior número de espécies foram Emberizidae (n = 21; 27,27% e Tyrannidae (n = 15; 19,48%. As espécies com maior abundância relativa foram Turdus leucomelas (n = 40; 9,59% e Turdus rufiventris (n = 36; 8,63%. Seis das espécies amostradas (7,8% são endêmicas do bioma Mata Atlântica. Na estação chuvosa foram amostradas 68 espécies, e na estação seca, 42; e as capturas estiveram relacionadas com as chuvas (rs = -0,6778; p = 0,05. O período reprodutivo ocorreu de outubro a março estando correlacionado com o início da estação chuvosa (rs = -0,702; p = 0,052.This study was conduced in a second growth woodland close to Itatiaia National Park (22º30'S e 44º30'W, Rio de Janeiro state, Brazil, and aimed to describe the understory bird community living in this area. We sampled three different vegetation types, reforestation, wood and orchard, through 19 field trips between 1984 and 1999. Birds

  5. Multivariate analysis of stable isotope data in the traceability process for birds=Análise multivariada em dados de isótopos estáveis no processo de rastreabilidade em aves

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    Maria Márcia Pereira Sartori

    2012-10-01

    Full Text Available Isotope analysis has proved to be an extremely important tool in the traceability process; however, statistical analyses of the results show discrepancies, as the data depend on and originate from several chemical elements such as carbon, hydrogen, oxygen, nitrogen and sulfur (CHONS. In order to establish the proper analysis of traceability data for birds using the stable isotope technique and evaluate the need for a combined analysis of the variables, data for carbon-13 and nitrogen-15 were used from eggs (albumen + yolk of laying hens and the pectoral muscle of broilers, which were subjected to univariate statistical analysis (ANOVA and complemented with Tukey’s test and multivariate statistical analysis (MANOVA and Discriminant Analysis. The data were analyzed using Minitab 16 software, and the results, corroborated in the theory, confirm the need for multivariate analysis, showing also that discriminant analysis clarifies questions from the results of the other analysis methods compared in this study.A análise isotópica tem se mostrado uma ferramenta de suma importância ao processo de rastreabilidade, no entanto, existem divergências nas análises estatísticas dos resultados, uma vez que os dados são dependentes e advindos de vários elementos químicos tais como Carbono, Hidrogênio, Oxigênio, Nitrogênio e Enxofre (CHON’S. Com o intuito de estabelecer a análise propícia para os dados de rastreabilidade em aves pela técnica de isótopos estáveis e avaliar a necessidade da análise conjunta das variáveis, foram usados dados de carbono-13 e de nitrogênio-15 de ovos (albúmen + gema de poedeiras e músculo peitoral de frangos de corte, os quais foram submetidos à análise estatística univariada (Anova e complementada pelo teste de Tukey e multivariada (Manova e Discriminante. Os dados foram analisados no software Minitab 16, e os resultados, consolidados na teoria, confirmam a necessidade de análise multivariada, mostrando

  6. Composição química e valores de energia metabolizável de subprodutos agroindustriais determinados com diferentes aves = Chemical composition and values of metabolizable energy of alternative feedstuffs determined with different birds

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    Roberto Batista Silva

    2008-07-01

    Full Text Available Este experimento foi conduzido com o objetivo de determinar a composição química e os valores de energia metabolizável aparente (EMA e aparente corrigida pelo balanço de nitrogênio (EMAn do farelo da castanha de caju (FCC, do farelo de coco (FCe de dois tipos de levedura da cana-de-açúcar (LEV1 e LEV2 para pintos, galos e codornas japonesas. Três ensaios de metabolismo foram realizados utilizando a metodologia de coleta total de excretas. Os tratamentos consistiram em uma ração-referência e quatro rações-teste(40% do subproduto e 60% da ração-referência. Para todos os alimentos avaliados, os valores de EMA e EMAn determinados com codornas e galos foram superiores aos determinados com pintos. Para o FC e LEV2, os valores de EMA e EMAn obtidos com codornas foram inferiores aos obtidos com galos; entretanto, para o FCC, obtiveram-semaiores valores de EMA e EMAn com codornas. Independentemente do tipo de ave, os valores de EM determinados para a LEV1 foram superiores aos da LEV2.This experiment was conducted to determine the chemical composition and the values of apparent metabolizable energy (AME and nitrogen-corrected apparent metabolizable energy (AMEn of cashew nut meal (CNM, coconut meal (CONM and two types of sugar cane yeast (SCY1 andSCY2 for chicks, roosters end Japanese quail. Three digestibility trials were carried out using the methodology of the total excreta collection. Treatments consisted of a referencediet and four test-diets (40% feedstuffs and 60% reference-diet. The values ofmetabolizable energy determined with Japanese quail and roosters were higher than those obtained with chicks. For CONM and SCY2, the AME and AMEn determined with Japanese quail were lower than those determined for roosters, but the highest values of AME and AMEn for CNM were obtained with Japanese quail. Regardless of the bird type,the SCY1 showed higher values of AME and AMEn than those of SCY2.

  7. Estructura de la comunidad de aves en sistemas de producción del Piedemonte Amazónico / Community structure of birds in production systems in the Amazonian Foothills

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    Velásquez Valencia, Alexander

    2010-01-01

    En el piedemonte amazónico caqueteño confluyen las biotas, y en particular las aves, de la región andina y de la planicie amazónica. Sin embargo esta región es afectada por la transformación de sus bosques, consecuencia de las actividades de tumba y quema para el establecimiento de sistemas de producción (ganaderos, silvopastoriles y agroforestales) y cultivos ilícitos. Estos cambios en la vegetación ocasionan que algunas especies de aves tienden a desaparecer localmente y otras aumentar en n...

  8. Avaliação do desempenho de um aquecedor para aves adaptado para utilizar biogás como combustível Birds heater adaptation and performance using biogas as fuel

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    Tânia M. B. Santos

    2007-12-01

    Full Text Available Desenvolveu-se ensaio para avaliar a adaptação (diâmetro do injetor e o desempenho (consumo e eficiência de aquecimento de um aquecedor tipo campânula, adaptado para queimar biogás. Foi testado um aquecedor comum que, queimando gás liquefeito de petróleo (GLP, opera à baixa pressão (28 cm.c.a., com capacidade calorífica de 5.024 kJ h-1 e recomendado para 500 aves. O aquecedor foi avaliado com o combustível original (GLP, sem qualquer modificação no injetor de gás, e após adaptação para o funcionamento a biogás. Na adaptação, foi mantida a mesma grelha do queimador principal, aumentando-se a perfuração do injetor para permitir o funcionamento e a avaliação. Foram avaliados cinco injetores com perfurações de 1,0053; 1,5080; 1,5708; 1,7672 e 1,980 mm². Também se variaram as pressões do biogás na entrada do aquecedor de 10; 12; 15; 17 e 20 cm de coluna d'água (cm.c.a.. Os resultados indicaram que as expressões de cálculo teórico e parâmetros propostos na bibliografia podem ser utilizados com segurança na adaptação de aquecedores do tipo campânula utilizados em aviários; que a adaptação é de simples execução, indicando a viabilidade da utilização dos aquecedores já existentes em granjas e no mercado, e que as temperaturas do ar foram semelhantes às obtidas com o combustível original (GLP.It was carried out a trial to evaluate the adaptation (injector diameter and performance (biogas consumption and heating efficiency of a heating adapted to burn biogas. It was tried a common heater, burning liquefied petroleum gas (LPG, operating with low gas pressure (28 cm water column, with calorific capacity of 5024 kJ/h and recommended for 500 birds. The heater was evaluated with the original fuel (LPG without any modification in the gas injector and after adapting to biogas burning. Five injectors were evaluated with drillings of 1,0053; 1,5080; 1,5708; 1,7672 and 1,980 mm2. It also was varied the biogas

  9. DETECCIÓN Y DIFERENCIACIÓN DE Mycoplasma gallisepticum Y Mycoplasma synoviae MEDIANTE LA TÉCNICA DE PCR A PARTIR DE HISOPOS TRAQUEALES DE AVES CON SÍNTOMAS RESPIRATORIOS Detection and Differentiation of Mycoplasma gallisepticum and Mycoplasma synoviaeby PCR from Tracheal Swabs from Birds with Respiratory Symptoms

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    CESAR E VENTURA

    2012-12-01

    Full Text Available Los micoplasmas son importantes patógenos en las aves por ser responsables de cuadros respiratorios que ocasionan grandes pérdidas económicas a la industria avícola alrededor del mundo. Existen principalmente dos especies de micoplasmas como causantes de enfermedad en aves comerciales, el Mycoplasma gallisepticum(MG y el Mycoplasma synoviae(MS. Teniendo en cuenta su importancia y la necesidad de conocer y diferenciar las diferentes especies de micoplasmas presentes en las explotaciones avícolas, se tomaron 91 muestras de hisopos traqueales de aves con síntomas respiratorios, provenientes de igual número de granjas de pollo de engorde, ponedoras comerciales y reproductoras pesadas ubicadas en los departamentos de Cundinamarca y Boyacá, Colombia, y se determinó la presencia de MG y MS por la técnica de PCR. La prevalencia determinada fue de 39,6 % para MG y 47,3 % para MS, encontrándose diferencias estadísticamente significativas cuando se comparó la positividad a MG y MS y el tipo de explotación (p Mycoplasmas are worldwide pathogens that affect the poultry industry causing respiratory illness which cause a negative economic impact. Two mycoplasmas species are the most important in the commercial poultry: Mycoplasma gallisepticum(MG and Mycoplasma synoviae(MS. By its importance and necessity to know and differentiate between mycoplasmas species in locals poultry houses this study used the PCR technique like a diagnosis tool, using tracheal swabs from bird with respiratory symptoms. A total of 91 samples from broilers, layers and breeders farms located in the departments of Cundinamarca and Boyacá was processed. The punctual prevalence founded in this study was 39.6 % for MG and 47.3 % for MS. Statistical differences for type of production and positive samples for MG y MS (p < 0.05 were founded, a bigger number of positive samples from layers and breeder in comparison to broilers was found. In the same way, the positive samples for

  10. Malófagos (Phthiraptera recolhidos de aves silvestres no Zoológico de São Paulo, SP, Brasil Chewing lice (Phthiraptera from wild birds in the São Paulo Zoo, State of São Paulo, SP, Brazil

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    Michel P. Valim

    2005-12-01

    Full Text Available Vinte e oito espécies de malófagos foram recolhidas de aves silvestres no acervo do Zoológico de São Paulo durante o ano de 2003. Vinte e três foram identificadas ao nível de espécie e cinco ao nível genérico. Os relatos de novas espécies no Brasil e novas associações parasitárias para a literatura são discutidos.Twenty-eight species of chewing lice were recovered from wild birds in the São Paulo Zoo during 2003. Twenty-three were identified to species level and five to the generic level. New species records for Brazil and new host-lice associations are discussed.

  11. Conservation of early odontogenic signaling pathways in Aves

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    Chen, Yiping; Zhang, Yanding; Jiang, Ting-Xing; Barlow, Amanda J.; St Amand, Tara R; Hu, Yueping; Heaney, Shaun; Francis-West, Philippa; Chuong, Cheng-Ming; Maas, Richard

    2000-01-01

    Teeth have been missing from birds (Aves) for at least 60 million years. However, in the chick oral cavity a rudiment forms that resembles the lamina stage of the mammalian molar tooth germ. We have addressed the molecular basis for this secondary loss of tooth formation in Aves by analyzing in chick embryos the status of molecular pathways known to regulate mouse tooth development. Similar to the mouse dental lamina, expression of Fgf8, Pitx2, Barx1, and Pax9 defines a potential chick odonto...

  12. Mixed bird flocks: patterns of activity and species composition in a region of the Central Andes of Colombia Bandadas mixtas de aves: patrones de actividad y composición de especies en una región de la Cordillera Central de los Andes de Colombia

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    Enrique Arbeláez-Cortés

    2011-06-01

    Full Text Available Mixed bird flocks are groups of individuals from different species that travel and forage together. Such groups are common in several bird communities around the world. We present species composition and activity patterns of mixed bird flocks in a region of the Central Andes of Colombia. We compared the number of species per flock, as well as the number of flocks among 3 different habitats. We tested hypotheses concerning the flocks daily activity and the co-occurrences of species within them. We recorded 75 species, and the species number per flock varied from 4 to 21. Our data suggest that habitat affects the number of flocks but not their species number, and that the activity of flocks is similar throughout the day. In addition, the association of birds in flocks is affected by interspecific facilitation, with some species co-occurrences found more times than expected by chance. We hypothesize that some tanager species could have a role in flock cohesion. We witnessed 2 predator attacks upon flocks, a number of agonistic interactions among flock members, and squirrels following bird flocks. Our results meet some general patterns described for mixed bird flocks.Las bandadas mixtas de aves son grupos de individuos de diferentes especies que viajan y forrajean juntos, y son comunes en varias comunidades de aves alrededor del mundo. Presentamos la composición de especies y los patrones de actividad de las bandadas mixtas de aves en una región de la Cordillera Central de los Andes Colombianos. Comparamos el número de especies por bandada y el número de bandadas en 3 hábitats distintos. Evaluamos hipótesis relacionadas con la actividad de las bandadas durante el día y la presencia simultánea de especies en estos grupos. Observamos 75 especies, y el número de especies por bandada varió entre 4 y 21. Nuestros datos indican que el hábitat parece afectar el número de bandadas pero no su número de especies y que la actividad de las bandadas

  13. Fisonomía vegetal y abundancia de aves en un bosque templado con dos niveles de perturbación en el Eje Neovolcánico Transversal Vegetation physiognomy and abundance of birds in a temperate forest with two disturbance levels in the Eje Neovolcanico Transversal

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    Saúl Ugalde-Lezama

    2012-03-01

    Full Text Available Durante noviembre 2003 y junio 2004 se estudió la abundancia de especies de aves y su relación con la fisonomía vegetal en un bosque templado bajo 2 condiciones: bosque de pino no perturbado (ZOQ1 y bosque de pino perturbado (ZOQ2 de la Estación Forestal Experimental Zoquiapan (EFEZ, Estado de México. Para el conteo de aves se empleó el método de puntos de conteo con radio fijo (25 m. Los principales gradientes de las variables descriptoras de la vegetación se determinaron con análisis de componentes principales (ACP y la relación fisonomía-abundancia por especie y grupos de aves mediante análisis de regresión Poisson (ARP. Los ejes principales del ACP explicaron el 84.3, 83.4 y 81.7% de la variabilidad presente en la vegetación de ZOQ1, ZOQ2 y ZOQ1-ZOQ2. La cobertura, diámetro y altura de árboles fueron las variables que explicaron el 41.5, 43.7 y 41.8% de la varianza para el componente 1. La cobertura, diámetro y altura de arbustivas explicaron el 28.4, 25.0 y 25.3% para el 2; por último, la cobertura de herbáceas y arbustivas el 14.4, 14.6 y 14.5% para el componente 3. Los ARP indicaron una relación estadísticamente significativa (pFrom November 2003 to June 2004, we studied the abundance of bird species and their relationship with vegetation physiognomy (structure in a temperate forest under 2 conditions: undisturbed forest (ZOQ1 and disturbed forest (ZOQ2 of the Zoquiapan Forest Experimental Station (EFEZ, acronym in Spanish in central Mexico. Birds were recorded using the method of fixed radius point counts (25 m. We identified the major gradients of variation of descriptive variables of vegetation using Principal Component Analysis (PCA, and the relationship between vegetation physiognomy and bird abundance through Poisson regression analyses (ARP. The three main axes of PCA explained the 84.3, 83.4 and 81.7% of the variability present in the vegetation of ZOQ1, ZOQ2 and ZOQ1-ZOQ2, respectively. Tree cover, diameter

  14. Intra-specific brood parasitism revealed by DNA micro-satellite analyses in a sub-oscine bird, the vermilion flycatcher Parasitismo intraespecífico revelado mediante análisis de microsatélites de ADN en un ave suboscina, el cardenalito o saca tu real

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    ALEJANDRO A RÍOS-CHELÉN

    2008-03-01

    Full Text Available Extra-pair reproduction is known to occur in many avian species. However, among passerines, the majority of studies on extra-pair reproduction have been carried out in oscine birds from temperate regions. Conversely, sub-oscines species, and particularly, species that inhabit tropical regions, have been studied to a much lesser extent. Given that a majority of avian species live in the tropics, it is important to study more tropical and sub-oscine species to have a more accurate picture of the rates of extra-pair reproduction among passerines, and a better understanding of the adaptive function of extra-pair reproduction in birds. Tropical species differ from temperate species in several ecological and life history traits, that may influence the occurrence of different modes of extra-pair reproduction and their prevalence. In this study we asked whether extra-pair reproduction occur in a sexually dimorphic and socially monogamous sub-oscine, the vermilion flycatcher (Pyrocephalus rubinus. We report cases of extra-pair paternity, extra-pair maternity and intra-specific brood parasitism, and discuss our results in the view of other studies with passerinesSe sabe que la reproducción extrapareja ocurre en muchas especies de aves. Sin embargo, entre paserinos, la mayoría de los estudios se han llevado a cabo en aves oscinas de regiones templadas. Por el contrario, las especies suboscinas, y en particular las especies que habitan regiones tropicales, se han estudiado mucho menos. Por lo tanto, es importante estudiar más especies tropicales y suboscinas para tener una visión más acertada de las tasas de reproducción extrapareja en paserinos y un mejor entendimiento de la función adaptativa de la reproducción extrapareja en aves. Las especies tropicales difieren de las especies que habitan regiones templadas en diversos rasgos ecológicos y de historia de vida, que podrían influir en las tasas de ocurrencia de diferentes modos de reproducci

  15. Shyness and boldness in greater rheas Rhea americana Linnaeus (Rheiformes, Rheidae: the effects of antipredator training on the personality of the birds Timidez e coragem em emas Rhea americana Linnaeus (Rheiformes, Rheidae: os efeitos do treinamento anti-predação na personalidade das aves

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    Cristiano S. de Azevedo

    2006-03-01

    Full Text Available The shy-bold continuum is an axis of behavioural variation for some species, but the consequences of shyness and boldness in antipredatory behaviour is unknown. Bold animals have the tendency to be predated first after release in comparison to shy animals, who naturally avoid the predators. Antipredatory training has been used to enhance the defence behaviours of naive animals by various researchers around the world. For greater rheas, Rhea americana (Linnaeus, 1758, this kind of study is pioneer. In this study we have investigated if there are relationships between personality and performance of greater rheas in antipredatory training. We also investigated if the training procedures influenced the behaviour of the birds when presented to novel objects. Fifteen zoo-borne greater rheas were studied and 16 personality tests were run, being eight before the application of antipredator training, and eight after the training. We presented to the birds four novel objects (ball, box, bag and person and recorded their behaviour and the distance of the birds in relation to the objects. Results showed that the birds behave boldly before training and shyly after it. The antipredator training modified significantly the behaviour of the rheas, making them more careful about novel situations. Personalities affected the behaviour of the birds during antipredator training. The study of the animal personalities can be an useful tool in reintroduction programs since it helps to choose the animals with the highest chance of survival to reintroduce.O contínuo timidez-coragem é um eixo de variação comportamental para algumas espécies, mas as conseqüências da timidez e coragem no comportamento anti-predação não são conhecidas. Animais corajosos tendem a ser predados primeiramente após a reintrodução em comparação com os animais tímidos, que naturalmente evitam os predadores. O treinamento anti-predação tem sido usado para aumentar os comportamentos

  16. Variação local na composição da comunidade de aves no Parque Estadual Carlos Botelho, São Miguel Arcanjo – SP e proposta para o monitoramento do impacto do ecoturismo. Local variation in bird communities composition at Carlos Botelho State Park, São Miguel Arcanjo – SP, Southeastern Brazil and proposals for monitoring the impact of ecotourism.

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    Bruna Gonçalves da SILVA

    2010-12-01

    Full Text Available Como todas as atividades humanas, o ecoturismo apresenta o potencial de impactar negativamente o meio ambiente, necessitando ser monitorado e manejado. As aves podem ser incluídas em protocolos de monitoramento desse impacto, porém devem ser considerados outros fatores que influenciam a composição das comunidades de aves antes de se propor tais protocolos. Dentre estes se destaca a influência da heterogeneidade estrutural da vegetação sobre a distribuição e a abundância das aves. Os objetivos deste trabalho foram: verificar como esse fator atua localmente numa área de Mata Atlântica sob uso público e propor um protocolo de monitoramento de impacto dessa atividade que utilize as aves como indicadores. A avifauna foi amostrada ao longo de duas trilhas, uma na qual o turismo é monitorado e outra sob o sistema autoguiado. A heterogeneidade estrutural ao longo dessas trilhas foi avaliada, e as duas comunidades de aves comparadas em relação à riqueza, composição de espécies, abundância relativa, diversidade e estrutura trófica. Foram utilizados os métodos de pontos de escuta e o de pontos quadrantes. As trilhas diferiram significativamente na maioria dos parâmetros de estrutura da vegetação analisados e na composição de espécies de aves, mas não nos demais parâmetros considerados para a avifauna. Dezessete espécies apresentaram abundância relativa significativamente diferente entre as áreas e, destas, seis relacionadas a parâmetros estruturais da vegetação. Propõe-se a avaliação do impacto do uso público sobre a avifauna em cada uma das trilhas através do monitoramento da abundância relativa das espécies considerando possíveis alterações estruturais na vegetação local e o monitoramento de 15 espécies de fácil detecção e que não diferiram significativamente em abundância relativa entre as trilhas.Like all human activities, ecotourism has the potential to negatively impact the environment and need

  17. Frugivoria por aves em um mosaico de Floresta Estacional Semidecidual e reflorestamento misto em Rio Claro, São Paulo, Brasil Frugivory by birds in a mosaic of seasonal semideciduous forest and a mixed reforested area in Rio Claro, Sao Paulo, Brazil

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    Samira Athiê

    2012-03-01

    Full Text Available Visando subsidiar futuros projetos de recuperação florestal com base nas interações animal-planta, foram avaliadas as espécies ornitocóricas e o consumo de frutos por aves em um mosaico de Floresta Estacional Semidecidual e um reflorestamento misto, em Rio Claro, São Paulo. Através do monitoramento da frutificação e avaliação dos eventos de frugivoria em sessões focais e ad libitum, foram registradas 31 espécies ornitocóricas fornecendo frutos para 38 espécies de aves consumidoras. No reflorestamento misto foram observadas 90,3% (n=28 das espécies ornitocóricas frutificando ao longo de todo ano, enquanto no fragmento florestal, somente 51,6% (n=16 delas foram registradas, com maiores variações temporais na oferta de frutos; 65,2% (n=1027 dos frutos foram consumidos no reflorestamento misto e 34,8% (n=547 no fragmento florestal. Tais resultados podem estar relacionados ao menor tamanho do fragmento de vegetação nativa, o que, proporcionalmente, poderia determinar uma menor riqueza de espécies vegetais no mesmo e/ou ao fato de a dispersão abiótica tender a predominar nos locais fragmentados e perturbados. O reflorestamento misto, embora apresente algumas espécies vegetais exóticas, está sendo ecologicamente mais funcional para a avifauna e, devido à proximidade com o fragmento, parece estar contribuindo para a manutenção das comunidades de aves residentes e visitantes deste último através dos recursos alimentares oferecidos.To support future forest recovery projects based on plant-animal interactions, this work aimed to evaluate the ornithochoric species and fruit consumption by birds in both a mosaic of seasonal semideciduous forest and a mixed reforested area in Rio Claro, Sao Paulo, Brazil. By monitoring and evaluating fruiting and frugivory events in focal and ad libitum sessions, 31 ornithochoric species were found that provide fruits to 38 species of frugivorous birds. In the mixed reforested area, 90.3% (n

  18. Aves de um fragmento de Mata Atlântica no alto Rio Doce, Minas Gerais: colonização e extinção The birds of an Atlantic Forest fragment at upper Rio Doce valley, Minas Gerais, southeastern Brazil: colonization and extinction

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    Christiana M. A. Faria

    2006-12-01

    Full Text Available Foi conduzido um levantamento de espécies de aves em um fragmento florestal no alto Rio Doce de abril de 2002 a novembro de 2004. A região está inserida numa das áreas prioritárias para conservação da biodiversidade do Brasil, a Mata Atlântica. O fragmento está dentro da 'Estação de Pesquisa e Desenvolvimento Ambiental de Peti' (EPDA-Peti e cerca uma represa de uma usina hidroelétrica das 'Companhia Energética de Minas Gerais'. O fragmento possui 605 ha de mata secundária semidecídua em vários estágios de regeneração. O método utilizado foi o de observação direta ao longo de 'transectos', captura com redes, pontos de escuta e identificação a partir do uso de vocalizações. Foram registradas 231 espécies de aves pertencentes a 57 famílias. Isso corresponde cerca de 33% das 682 espécies já registradas para o bioma da Mata Atlântica. Constam nesta lista 33 espécies endêmicas da Mata Atlântica e uma endêmica do Cerrado. Cinco espécies são ameaçadas em Minas Gerais e uma espécie ameaçada de extinção global, o mutum do sudeste Crax blumenbachii Spix, 1825 (Cracidae. Foram encontradas 35 novas espécies em relação ao levantamento de 1989, bem como a extinção local de outras 52 espécies. O fragmento florestal da EPDA-Peti abriga uma porção significativa da avifauna da Mata Atlântica, e monitoramento de longo prazo irá revelar aspectos importantes para compreensão dos mecanismos de extinção e colonização na Mata Atlântica.It is presented a bird survey of a forest fragment at the upper Rio Doce valley carried out from April 2002 to November 2004. The region is within one of the most important Brazilian hot spot for biological conservation: the Atlantic Forest. The fragment is within 'Estação de Desenvolvimento Ambiental de Peti' (EPDA-Peti under the premises of a hydroelectric power station run by the Minas Gerais Energetic Company. It holds 605 ha of a mosaic of secondary growth forest patches

  19. Bird community in an Araucaria forest fragment in relation to changes in the surrounding landscape in Southern Brazil Comunidade de aves em um fragmento de floresta de araucária em relação a mudanças na paisagem circundante no sul do Brasil

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    Pedro Scherer-Neto

    2012-12-01

    Full Text Available The dynamics of the bird community in a small forest fragment was evaluated along seven years in relation to changes in the surrounding landscape. The study area is an Araucaria forest fragment in Southern Brazil (state of Paraná. The sampling period covered the years 1988 through 1994 and the mark-release-recapture method was utilized. The landscape analysis was based on Landsat TM images, and changes in exotic tree plantations, native forest, open areas (agriculture, pasture, bare soil, and abandoned field, and "capoeira"(native vegetation Este estudo avaliou a dinâmica da comunidade de aves em um fragmento florestal ao longo de sete anos e correlacionou às mudanças ocorridas na paisagem circundante. A área de estudo localiza-se na Região Sul do Brasil (Estado do Paraná e a vegetação está representada por Floresta Ombrófila Mista. O período de amostragem ocorreu entre os anos de 1988 a 1994 e o método utilizado foi captura-marcação e recaptura. Para análise da mudança no uso e cobertura da paisagem foram utilizadas imagens Landsat TM e um sistema de informação geográfico. Quatro classes foram usadas, sendo: plantios com espécies exóticas, floresta nativa, capoeiras (vegetação nativa < 2 m de altura e áreas abertas (campo abandonado, pastagens, área agrícola e solo exposto. Foi analisada a relação entre as mudanças na paisagem e as mudanças na abundância e diversidade de aves de floresta, de área aberta, de borda e especialistas de bambu. Foram calculadas as estimativas de riqueza para cada ano estudado. A riqueza registrada na área de estudo foi de 96 espécies e as estimativas foram 114, 118 e 110 espécies para Chao 1, Jackknife 1 e Bootstrap, respectivamente. A comunidade de aves variou em abundância, riqueza e diversidade entre os anos estudados. Considerando a diversidade de espécies, os valores observados em 1991, 1993 e 1994 foram significativamente diferentes. As modificações na paisagem tamb

  20. A composição dos bandos mistos de aves na Mata Atlântica da Serra de Paranapiacaba, no sudeste brasileiro Mixed flocks of birds in Atlantic Rain Forest in Serra de Paranapiacaba, southeastern Brazil

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    C. G. MACHADO

    1999-01-01

    Bandos mistos de aves são agrupamentos de duas ou mais espécies cuja formação e coesão se devem a interações comportamentais entre seus integrantes. Este estudo investigou a composição dos bandos mistos na Mata Atlântica do Parque Estadual Intervales, no alto da Serra de Paranapiacaba, SP, Brasil (24º12' a 24º25'S; 48º03' a 48º30'W). Foram feitas visitas mensais de abril de l990 a março de l991. A cada bando contatado registrava-se o número de indivíduos, composição e distribuição específica ...

  1. Comparação quantitativa da comunidade de aves de um fragmento de floresta semidecidual do interior do Estado de São Paulo em intervalo de 30 anos A 30-year quantitative comparison of the bird community of a semideciduous forest remnant in the state of São Paulo

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    Vagner Cavarzere

    2012-12-01

    Full Text Available Poucos estudos avaliaram em longo prazo a variação no tamanho populacional das espécies de aves em fragmentos florestais. Para avaliar a riqueza e a abundância específica da comunidade de aves de um remanescente de mata semidecidual do interior do Estado de São Paulo, sudeste do Brasil, foi conduzido o censo da avifauna florestal utilizando-se a metodologia de contagem em transecção. Estes resultados foram comparados com levantamento realizado na mesma localidade 30 anos antes, e as aves foram classificadas de acordo com suas categorias alimentares com a finalidade de associá-las à tendência ao aumento/diminuição de suas abundâncias após este intervalo de tempo. Embora tenha havido predominância de espécies com diminuição populacional, todas as categorias tróficas analisadas apresentaram também espécies com aumento em suas abundâncias. A maioria das espécies com propensão a deslocarem-se entre fragmentos apresentou diminuição em suas abundâncias. Sugerimos que, em relação a suas abundâncias específicas, as categorias tróficas são igualmente afetadas pelos processos da fragmentação, e que a regeneração florestal sofrida pelo remanescente pode ter resultado na perda de espécies de bordas. Espécies cujas abundâncias tenham reduzido neste intervalo de tempo podem sofrer extinção local futuramente.Few studies have evaluated long-term changes in avian abundance in forest remnants. To compare both species richness and abundance of the bird community in a forest fragment located in the municipality of Gália, state of São Paulo, southeastern Brazil, we surveyed forest birds using transect counts. We compared our results with a survey conducted 30 years earlier at the same locality and further classified bird species according to their food habits to eventually predict fluctuations of specific abundance. Although species with population declines predominated in the community, all trophic categories had species

  2. Depredación de aves acuáticas por la nutria neotropical (Lontra longicaudis annectens, en el río Yaqui, Sonora, México Aquatic bird predation by neotropical river otter (Lontra longicaudis annectens, at Rio Yaqui, Sonora, Mexico

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    Juan Pablo Gallo-Reynoso

    2008-06-01

    Full Text Available Se registra la depredación de aves acuáticas por la nutria neotropical (L. longicaudis annectens en el río Yaqui, Sonora. Se colectaron e identificaron 25 cráneos, porciones de esqueleto postcraneal y plumas de aves encontrados en los comederos de las nutrias; las especies identificadas fueron el cormorán neotropical (Phalacrocorax brasilianus con 16 individuos, el pato de collar (Anas platyrhynchos diazi, 4 individuos; la garza blanca (Ardea alba, 3 individuos; el huaco de corona amarilla (Nyctanassa violacea y el pelícano café (Pelecanus occidentalis, ambos con 1 individuo. En los peces se encontró la tilapia del género Oreochromis. Probablemente los hábitos alimenticios de esta especie responden a la estacionalidad y al consumo de presas más disponibles en el hábitat. Estos registros confirman que las nutrias de río son depredadores oportunistas cuya dieta tiene una amplio rango de uso de especies de los ambientes riparios, además dichos registros son una razón más para considerar la nutria neotropical como especie sombrilla para la conservación de ecosistemas completos, ya que su presencia es un indicador de alta disponibilidad energética y de alta biodiversidad.We report the predation of aquatic birds by neotropical river otters (L. longicaudis annectens at Río Yaqui, Sonora. As many as 25 skulls, post-cranial skeletons and feathers were found at river otter feeding sites. The neotropical cormorant (Phalacrocorax brasilianus was the most predated bird with 16 individuals, followed by Mexican mallard (Anas platyrhynchos diazi with 4 individuals, great egret (Ardea alba with 3 individuals, yellow-crowned night-heron (Nyctanassa violacea, and brown pelican (Pelecanus occidentalis, both with 1 individual. With respect to fish, the tilapia Oreochromis, was the only species found in scats. Neotropical river otter feeding habits were associated with food availability at different seasons of the year. These records show that

  3. Distribución espacio-temporal de aves acuáticas invernantes en la Ciénega de Tláhuac, planicie lacustre de Chalco, México Spatio-temporal distribution of wintering aquatic birds in the Ciénega de Tláhuac, Chalco lacustrine plain, Mexico

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    Víctor Ayala-Pérez

    2013-03-01

    Full Text Available La avifauna acuática invernal de la ciénaga de Tláhuac fue estudiada de noviembre de 2006 a febrero de 2007; se identificaron 40 especies, 3 de las cuales corresponden a nuevos registros. El área fue utilizada por, al menos, 25 000 aves acuáticas; 5 fueron las especies dominantes: 3 anátidos (Anas clypeata, A. platyrhynchos diazi y Oxyura jamaicensis, 1 ave playera (Limnodromus scolopaceus y 1 gallareta (Fulica americana. Sobresalió por su abundancia A. platyrhynchos diazi, subespecie endémica y amenazada, ya que los 2 200 individuos observados representan el 4% de la población total estimada. Las especies mejor representadas mostraron una utilización espacial diferencial, con 3 patrones: 1 especies con distribución uniforme (A. clypeata y F. americana, 2 las agrupadas en una sola porción del humedal (A.p. diazi y O. jamaicensis y 3 aquella con afinidad por 2 porciones del humedal (L. scolopaceus. La ciénega de Tláhuac es un humedal importante para la avifauna de la región; en ella ocurren, durante el invierno, 6 especies protegidas por el gobierno mexicano; sin embargo, existen factores antrópicos que ponen en riesgo su integridad y que hacen necesarias acciones de protección y conservación.The winter waterbirds of the Ciénega de Tláhuac were studied from November 2006 to February 2007; a total of 40 species were observed, with 3 new records. The area was usedby al least 25 000 birds; 5 species were the dominant: 3 anatids (Anas clypeata, A. platyrhynchos diazi y Oxyura jamaicensis, 1 shorebird (Limnodromus scolopaceus and 1 coot (Fulica americana. The abundance of A. platyrhynchos diazi, a threatened endemic subspecies, was remarkable because the 2 200 individuals observed represent 4% of its population.The best represented species showed a differential spatial use, with 3 patterns: 1 species with homogeneous use (A. clypeata y F. americana, 2 with affinity to a single portion of the wetland (A. p. diazi y O. jamaicensis

  4. Ectoparásitos del orden PHTHIRAPTERA en Aves Silvestres

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    Andrea Saavedra-Orjuela

    2014-12-01

    Full Text Available Los ectoparásitos de las aves silvestres en Colombia han sido poco estudiados. Se tiene conocimiento que éstos animales pueden ser afectados por ácaros, pulgas, garrapatas y moscas. Sin embargo, los piojos juegan un papel protagónico en el ectoparasitismo de aves silvestres y tienden a ser altamente específicos con sus huéspedes; por lo tanto, hay muchas especies de Phthiraptera que se han registrado a partir de un solo huésped, mientras que algunas otras especies se han registrado en varias especies de aves estrechamente relacionadas. Se hace verdaderamente importante desde el ámbito médico veterinario tener registro del tipo de ectoparásito involucrado en caso de haber infestaciones severas. Los factores que favorecen el contacto directo entre las aves infestadas con otras, como el número de veces que esto ocurra, el tiempo de duración de los contactos y la longitud de las plumas, contribuye altamente a la infestación entre individuos. Así mismo, las medidas de los especímenes se relacionan directamente con el estadio de desarrollo en el que se encuentre y éste vivirá todo su ciclo de vida sobre el ave pues es completamente dependiente para su supervivencia. En el orden Phthiraptera se encuentra el suborden Amblycera, de los cuales se conoce que tres familias parasitan a las aves (Laemobothridae, Menoponidae y Ricinidae y el suborden Ischnocera, de la cual sólo una de sus familias principales (Philopteridae parasita a las aves, la cual involucra una numerosa lista de especies.   ECTOPARASITES OF THE PHTHIRAPTERA ORDER IN WILD BIRDS. Abstract. Ectoparasites of wild birds in Colombia have been little studied. It is known these animals can be affected by mites, fleas, ticks and flies. However, lice play a leading role in wild birds ectoparasitism and tend to be highly specific to their guests; therefore, there are many species of Phthiraptera that have been recorded from a single host, while some other species have been

  5. Análise comparativa da assembléia de aves em dois remanescentes florestais no interior do Estado de São Paulo, Brasil Comparative analysis of birds community in two forested fragments in the State of São Paulo, Brazil

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    Reginaldo J. Donatelli

    2007-06-01

    Full Text Available Realizou-se o levantamento quantitativo e qualitativo da comunidade de aves de dois fragmentos de floresta estacional semidecídua no interior do estado de São Paulo de julho de 2004 a julho de 2005. Para o estudo quantitativo utilizou-se da metodologia de Pontos de Escuta. Foram analisados os índices de diversidade e de freqüência de ocorrência dessa comunidade. O levantamento qualitativo registrou 181 espécies na Fazenda Rio das Pedras - FRP (Itapetininga, 350 ha e 126 espécies na Fazenda Santa Maria II - FSM (Buri, 480 ha, enquanto que o levantamento quantitativo registrou a presença de 73 espécies em 988 contatos e 64 espécies em 1019 contatos para FRP e FSM, respectivamente. O índice pontual de abundância (IPA variou de 0,01 (1 contato a 1,32 (132 contatos, para FRP e na FSM variou entre 0,01 (1 contato a 0,97 (97 contatos. A diversidade do fragmento da FRP foi de H’ = 3,04 e na FSM de H’ = 2,85 onde a eqüitatividade em ambas áreas foi de 0,91. A comunidade de aves nos fragmentos estudados mostrou o mesmo padrão encontrado em outros fragmentos de floresta estacional semidecídua de tamanhos relativos. As categorias alimentares mais representativas nos dois remanescentes foram insetívoras (53% na FSM e 50% na FRP e frugívoras (23% na FSM e 26% na FRP. Dentre os insetívoros, destacaram-se as famílias Tyrannidae na FSM e Thamnophilidae na FRP. Tanto na FSM como na FRP os insetívoros de sub-bosque foram mais representativos (53% e 51,4% respectivamente, seguidos pelos frugívoros de sub-bosque (50% na FSM e frugívoros de copa (52,6% na FRP. A importância do estudo de comunidade de aves esta ligada à elaboração do plano de manejo e conservação das áreas naturais.Qualitative and quantitative survey of bird community were performed in two distinct semideciduous forest in the interior of the State of São Paulo from July 2004 to July 2005. Point Counts were used for the quantitative survey followed by diversity and

  6. Aberraciones cromáticas en aves de la colección ornitológica del Museo Argentino de Ciencias Naturales “Bernardino Rivadavia” Chromatic aberrations in birds of the ornithological collection of the Museo Argentino de Ciencias Naturales “Bernardino Rivadavia”

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    Matías Ricardo Urcola

    2011-12-01

    Full Text Available En el presente trabajo se determinan las aberraciones cromáticas que afectan el plumaje de las aves en la colección ornitológica del Museo Argentino de Ciencias Naturales de Buenos Aires. Estas alteraciones se deben a exceso o defecto en la producción y/o deposición del pigmento melanina, las familias afectadas pertenecen a Tinamidae, Spheniscidae, Ardeidae, Threskiornithidae, Anatidae, Falconidae, Rallidae, Charadriidae, Columbidae, Strigidae, Momotidae, Furnariidae, Mimidae, Motacillidae, Emberizidae e Icteridae. Dentro de las aberraciones propuestas el leucismo parcial (40,5 % es la más numerosa, seguida por la dilución pastel (23,8 %, albinismo (14,3 % y finalmente los plumajes brown, ino y eumelanismo parcial (7,1 % cada una.The paper makes out a strong case for determine chromatic aberrations that affect the coloring of the birds in the ornithological collection of the Museo Argentino de Ciencias Naturales de Buenos Aires. These alterations are due to excess or deficiency in the production and/or deposition of melanin pigment, the affect families belong to Tinamidae, Spheniscidae, Ardeidae, Threskiornithidae, Anatidae, Falconidae, Rallidae, Charadriidae, Columbidae, Strigidae, Momotidae, Furnariidae, Mimidae, Motacillidae, Emberizidae and Icteridae. Within the proposed changes, the partial leucism (40,5 % is the most numerous, followed by pastel dilution (23,8 %, albinism (14,3 % and finally brown aberrations, ino and partial eumelanism, each one of then had (7,1 %.

  7. Searching for bioindicators of forest fragmentation: passerine birds in the Atlantic forest of southeastern Brazil Busca por bioindicadores de fragmentação florestal: aves Passeriformes na Floresta Atlântica do Sudeste do Brasil

    OpenAIRE

    A. Piratelli; SD. Sousa; JS. Corrêa; VA. Andrade; RY. Ribeiro; LH. Avelar; EF. Oliveira

    2008-01-01

    Aiming to evaluate the potential of Passerine birds as bioindicators of forest fragmentation, we studied the avifauna in the mountain region of the state of Rio de Janeiro by mist-netting between 2001 and 2005. We sampled six sites, including four small fragments (from 4 to 64 ha) in an agricultural area (Teresópolis), one second-growth forest (440 ha - Miguel Pereira) and a continuous forest (10,600 ha, Serra dos Órgãos National Park - SONP). Indicator Species analysis and a Monte Carlo test...

  8. Investigation of influenza in migrating birds, the primordial reservoir and transmitters of influenza in Brazil Investigação de influenza em aves migratórias, principal reservatório e transporte de influenza no Brasil

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    Adélia Hiroko Nagamori Kawamoto

    2005-03-01

    Full Text Available Birds are the most important reservoirs of the influenza virus. Its maintenance in its natural hosts, including man, allows the influenza virus to reassorts its strains. The recent report of an avian influenza A (H5N1 virus in humans, was in a child with fatal respiratory illness in China, 1997. The current study was conducted to elucidate the transportation of the influenza by birds that migrate, annually, through the both Northern and Southern hemispheres, with special attention paid to the Vireo olivaceus [Juruviara(BR or Red-eyed vireo(USA] species, which travels from the USA to Brazil, and vice versa, and the Elaenia mesoleuca [Tuque(BR or (USA] species that flies over the entire Southern Hemisphere. There are two species of birds, which breed and migrate in São Paulo State, Brazil, and which were demonstrated to carry Influenza virus, were selected. The viral particles isolated were observed by electron microscopy. The influenza virus was detected by the House Duplex/PCR and Gloria molecular biology tests. The results demonstrated that the Elaenia mesoleuca and Vireo olivaceus bird species are carrying the Influenza virus whilst crossing both the Northern and Southern hemispheres. To understand the role that these migrating birds may play in epidemic influenza, in Brazil, characterization of avian influenza subtypes will be done.Os mais importantes reservatórios do vírus influenza são os pássaros. A manutenção do vírus influenza em hospedeiros naturais, inclusive o homem, permite que esse vírus realize rearranjos entre as suas cepas. O recente relato de uma cepa influenza aviária A(H5N1, em humanos, se deu em uma criança com doença respiratória fatal, na China em 1977. O presente estudo foi conduzido para elucidar o transporte da influenza por pássaros que migram, anualmente, através de ambos hemisférios o do Norte e do Sul, com especial atenção voltada à espécies Vireo olivaceo [Juruviara(BR e Red-eyed vireo(USA] que

  9. Novedosos registros de aves exhumadas del sitio arqueológico Laguna El Sosneado (LS-3 para el Holoceno tardío en el sur de Mendoza: aspectos tafonómicos NEW RECORDS OF BIRDS RECOVERED FROM THE LATE HOLOCENE ARCHAEOLOGICAL SITE LAGUNA EL SOSNEADO (LS-3, SOUTHERN MENDOZA: TAPHONOMIC ASPECTS

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    Fernando Julián Fernández

    2009-12-01

    Full Text Available Los aspectos tafonómicos vinculados con los restos de avifauna en contextos arqueológicos no han sido documentados para el área bajo estudio, hasta el presente. Los principales objetivos de este trabajo son efectuar una caracterización taxonómica cualitativa y cuantitativa de una muestra de aves, principalmente Passeriformes, proveniente de sedimentos holocénicos del sur de la provincia de Mendoza y elaborar un estudio sobre los procesos tafonómicos que intervinieron en el contexto arqueofaunístico. La muestra arqueofaunística fue comparada con muestras de egagrópilas actuales, a los fines de establecer el proceso de acumulación de los agregados óseos. El principal agente responsable de la acumulación habría sido un ave Strigiformes, posiblemente Tyto alba. Los agentes y procesos postdepositacionales que tuvieron mayor incidencia en la formación del agregado arqueofaunístico fueron el pisoteo, la acción corrosiva de las raíces y los efectos de la humedad del suelo, que habrían contribuido a destruir con mayor rapidez los elementos óseos. Es importante resaltar la baja representación de Passeriformes en los contextos arqueofaunísticos, debido, en gran medida, a sus características osteológicas. Según las características ecológicas de los taxones recuperados, los cuales se distribuyen actualmente en el área, podemos concluir que la zona donde se encuentra el sitio representa un área ecotonal, conformada hacia el Holoceno tardío.Until now, no record of the taphonomic aspects of bird remains in an archaeological context had been documented for the study area. The main goals of this paper are to conduct the qualitative and quantitative taxonomical characterization of a sample of birds, mainly Passeriformes, from Holocene sediments of southern Mendoza Province, and to study the intervening taphonomic processes in an archaeofaunal context. The archaeofaunistic sample was compared to modern owl pellet samples in order to

  10. Rapanea ferruginea (Ruiz & Pav. Mez. (Myrsinacea como uma importante fonte alimentar para as aves em uma mata de galeria no interior do Estado de São Paulo Rapanea ferruginea (Ruiz & Pav. Mez. (Myrsinacea as an important food resource birds in a gallery forest in São Paulo, southeastern Brasil

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    Márcia C. Pascotto

    2007-01-01

    Full Text Available Espécie típica de ambientes úmidos, Rapanea ferruginea produz diásporos globosos contendo uma única semente, envolta por um delgado pericarpo negro-arroxeado. Os comportamentos alimentares e a contribuição das aves na dispersão de sementes de R. ferruginea foram investigados em uma área de borda de mata de galeria, no município de São Manuel (22°43’S, 48°34’W, estado de São Paulo, sudeste do Brasil. Em 38 horas e 40 minutos de observações realizadas entre 20 de outubro e 12 de novembro de 2005, foram consumidos 11618 frutos por 31 espécies de aves, sendo a alta taxa de remoção de diásporos provavelmente devido à superabundância de frutos e à exposição dos mesmos na planta. Das 31 espécies registradas, 25 foram consideradas como potenciais dispersores por engolirem o diásporo inteiro e por realizarem visitas freqüentes e de curta duração. Turdus amaurochalinus Cabanis, 1851 foi a espécie que mais se alimentou em R. ferruginea, seguida por Dryocopus lineatus (Linnaeus, 1766 e Turdus leucomelas Vieillot, 1818, responsáveis por 43% do total de frutos consumidos, sendo ainda a primeira a espécie mais freqüente. A técnica de captura de frutos mais empregada foi "picking", enquanto "hanging" foi a menos utilizada, mas predominante em Vireo olivaceus(Vieillot, 1817 e D.lineatus. Foram registrados poucos encontros agonísticos, sendo Mimus saturninus Hellmayr, 1903 a espécie responsável pelo maior número de encontros interespecíficos, enquanto que as interações intraespecíficas foram lideradas por T. amaurochalinus e por T. leucomelas.Characteristic of humid habitats, Rapanea ferruginea produces globose drupes containing a single seed covered by a thin black-purplish pulp. The feeding behavior and the contribution of birds in dispersing R. ferrugineafruits was examined in a gallery forest edge in São Manuel (22°43’S, 48°34’W, state of São Paulo, southeastern Brazil. In 38 hours and 40 minutes of focal

  11. Terrestrial birds living on marine environments: does dietary composition of Cinclodes nigrofumosus (Passeriformes: Furnariidae predict their osmotic load? Aves terrestres viviendo en ambientes marinos: ¿es la composición dietaria de Cinclodes nigrofumosus (Passeriformes: Furnariidae un buen predictor de su carga osmótica?

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    PABLO SABAT

    2003-06-01

    Full Text Available Feeding on saline marine foods may be especially challenging for passerine birds that lack functional salt glands and have a limited ability to concentrate urine. To reduce the salt load imposed by consumption of marine food these birds may select food with low salt contents and/or increase their intake of freshwater. The genus Cinclodes is particular among passerines because it includes species that inhabit both inland and maritime shores. We analyzed the diet of Cinclodes nigrofumosus and explored the possible relationships between dietary composition and salt load at mesic and arid coastal sites of Chile. From a biogeographical perspective, we hypothesized that freshwater availability is critical to the relationship between diet composition and osmotic load of C. nigrofumosus. Our analysis of prey abundance and distribution indicated that the diet of C. nigrofumosus is composed mainly by marine prey, in spite of the availability of terrestrial insects at both sites. Stomach content osmolality was higher in the arid site, but it was not correlated with prey type, which suggests that Cinclodes nigrofumosus avoid a high osmotic load, drinking fresh water when available. Thus physiological constraints are modulating niche breath of CinclodesAlimentarse de presas marinas representa un desafío para aves paseriformes que no poseen glándula de la sal y tienen una habilidad limitada para concentrar orina. Para reducir la carga osmótica asociada al consumo de presas marinas estas aves podrían optar por incluir presas con bajas concentraciones salinas en su dieta y/o aumentar la ingestión de agua dulce. El género Cinclodes es particular entre los paseriformes debido a que incluye especies que habitan riberas de lagos, ríos y costas marinas. Analizamos la dieta de Cinclodes nigrofumosus y exploramos la posible relación entre la composición de ésta y la carga salina en dos sitios costeros de Chile, uno mésico y otro árido. En este estudio

  12. DETERMINACIÓN DE SEXO EN AVES MEDIANTE HERRAMIENTAS MOLECULARES

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    MATTA CAMACHO NUBIA E.

    2009-04-01

    Full Text Available

    RESUMEN

    La ausencia de dimorfismo sexual en los estadios juveniles y durante la edad adulta de gran cantidad de especies de aves, dificulta o imposibilita la determinación del sexo basados en el fenotipo. El empleo de marcadores moleculares para determinar el sexo de las aves es una herramienta útil debido a la exactitud y rapidez de los resultados y a su vez se constituye en un método que minimiza el estrés durante la toma de muestra, comparado con otras técnicas invasivas que pudieran afectar la salud o estabilidad biológica del animal. La determinación temprana del sexo en aves resulta de especial relevancia cuando se consideran programas de conservación ex situ, producción, explotación y estudios de ecología de poblaciones. Esta revisión presenta las metodologías usadas para determinar el sexo, haciendo especial énfasis en herramientas moleculares, presentando sus ventajas y limitaciones.

    Palabras clave: dimorfismo sexual, aves, CHD, tipificación molecular cromosoma W, cromosoma Z.


    ABSTRACT

    The lack of sexual dimorphism in nestling, juvenile or adult birds of large number of avian species, makes it difficult or impossible sex determination based on phenotipic characteristics. To use molecular markers for bird sex determination is a rapid and safe procedure; moreover this methodology minimizes the stress during sampling, compared to other invasive techniques that could affect the health or biological stability of the animal. The early sex determination in birds is of particular importance when considering ex situ conservation programs, production

  13. Aves de fragmentos florestais em área de cultivo de cana-de-açúcar no sudeste do Brasil Birds of forest fragments in area of sugar-cane crops in southeastern Brazil

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    Augusto Piratelli

    Full Text Available Foi estudada a avifauna de quatro fragmentos florestais em uma área de cultivo de cana-de-açúcar na região de Campos dos Goytacazes, norte do estado do Rio de Janeiro. A dieta básica e a estrutura das guildas tróficas foi determinada. O estudo foi realizado de outubro de 2000 a julho de 2001, utilizando-se capturas com redes ornitológicas, registros visuais e auditivos e análise de fezes. Quarenta e quatro espécies foram registradas e agrupadas em oito guildas tróficas (insetívoros, granívoros, carnívoros, frugívoros, piscívoros, nectarívoros, onívoros e detritívoros. Estas espécies foram também subdivididas em guildas mais específicas, associadas a seus hábitats. Algumas espécies apenas sobrevoaram os fragmentos, como Egretta thula (Molina, 1782, enquanto outras foram consideradas residentes, como Manacus manacus (Linnaeus, 1766. Algumas, como Amazona amazonica (Linnaeus, 1766, somente utilizaram os fragmentos para repouso noturno. Espécies pequenas de sub-bosque provavelmente não se deslocaram entre fragmentos, dada a relativa grande distância entre eles. Predadores como Rupornis magnirostris (Gmelin, 1789 utilizaram tanto os fragmentos quando as áreas abertas e canaviais em seu entorno. Estes fragmentos estão em situação crítica, abrigando principalmente espécies generalistas e/ou especialistas de bordas; porém ainda são utilizados de alguma forma por espécies de interesse ecológico, como Rhynchocyclus olivaceus (Temminck, 1820 e A. amazonica.Birds of four forest fragments in areas of extensive sugar-cane plantation were studied in Campos dos Goytacazes, northern Rio de Janeiro State, Brazil, from October 2000 to July 2001. The basic diet of sampled species and their trophic guild allocation were determined. The study was carried out by means of capture with mist nets, visual and auditive records and analysis of faeces. Forty-four species were recorded and grouped in eight trophic guilds (insectivores

  14. Uso de florestas secundárias por aves de sub-bosque em uma paisagem fragmentada na Amazônia central Use of secondary forests by understory birds in a fragmented landscape in central Amazonia

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    João Vitor Campos e Silva

    2012-03-01

    secondary forests that are established in the abandoned areas. The trend is an increase in secondary forests cover, resulting in a mosaic of primary forest (FP and fragments separated by an array of secondary forests (FS. In this scenario, the prediction of a massive extinction could be wrong if many species could survive in the secondary forests. To assess the importance of FS for the understory birds we sampled areas in regeneration and a continuous forest of a fragmented landscape. We conducted mist netting (24 nets/day for six consecutive days/month, for 8 months (May-November in 2009. Some forest species as do not seem to be adapted to the secondary forest environment and their occurrences are restricted to continuous forest environments. But most focal species showed no significant difference in apparent survival rates between the enviroments, suggesting that these species inhabit the secondary forest and the primary forest similarly. Because most of the matrix in fragmented landscapes are composed by secondary forests, such results highlights the conservation value that these habitats present in the long term. Thus, FS should be regarded as dynamic matrix that not only allows the movement of individuals but also function as habitat for many species typical of FP.

  15. A refratariedade das aves ao "Trypanosoma (Schizotrypanum cruzi" I. ausência de passagem para o sangue; duração da viabilidade e destruição dos parasitos na pele The refractory State of birds toward the "Trypanosoma (Schizotrypanum Cruzi": I. Lack of transfer of parasites to the blood. Duration of viability and destruction of the parasites in the skin

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    F. Nery-Guimarães

    1972-01-01

    foram negativas. Por outro lado, de 10 xenodiagnósticos feitos nas áreas injetadas, entre 1/2h e 9 h após a inoculação das aves, apenas 2 foram positivos; e de 10 xenodiagnósticos feitos entre 9 e 90 h, todos foram negativos. (Quadro 2. Em 4 frangos (8ª experiência, 10 xenodiagnósticos foram feitos entre 1 e 10 h, sendo 2 positivos (7 h e 8 h. Apesar de dificuldades operacionais na execução dos xenodiagnósticos, nas condições experimentais deste trabalho, eles se mostraram inferiores ás inoculações em camundongos recém-nascidos, como prova diagnóstica laboratorial. Portanto, verificou-se que ainda são encontrados parasitos viáveis nas áreas injetadas, pelo menos até ás 8:30 h depois inoculação. todavia, a partir de 2 h após a inoculação os parasitos diminuem de número progressivamente nas áreas injetadas, ao mesmo tempo que mostram sensíveis alterações morfológicas, encontrando-se também muito deles mortos. Ao exame direto, não mais foram vistos depois das 5:30 h. As inoculações provocam na pele dos frangos...In experiments number one and two, four chickens and three pigeons were not infected when subjected to skin inoculations containing parasites doses of 9.9 X 10*5 and 3.8 X 10*6 both from culture plus blood borne forms. In experiment number 6 the refractory state was not broken when two other chickens received every other day 5 intraperitoneal injections of 2.8 X 10*6 to 6.1 X 10*6 parasites or 5 intraperitoneal injections daily of the parasites from a culture tube suspended in saline plus blood borne forms from 3 infected young mice. The refractory state was not broken also in two chickens from experiment number 7, where dexamethasone was associated to the intraperitoneal parasites doses of 8.1 X 10*6 and 3.5 X 10*7, respectively. This drug was administered either on the first day (0.4 mg/8 doses/10 days or three days prior to the inoculation (0.4 mg/10 doses/12 days. In these 11 birds the refractory state was proven following

  16. The Bird.

    Science.gov (United States)

    Hannon, Jean

    2001-01-01

    Students use a dead bird to learn about bird life, anatomy, and death. Students examine a bird body and discuss what happened to the bird. Uses outdoor education as a resource for learning about animals. (SAH)

  17. Aves endêmicas e ameaçadas de extinção da Estação Ecológica de Xitué e a contribuição do taquaruçu Guadua tagoara (Nees Kunth para a riqueza local. Endemic and threatened birds of the Xitué Ecological Station and the contribution of the bamboo Guadua tagoara (Nees Kunth to local richness.

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    Alexsander Zamorano ANTUNES

    2007-12-01

    Full Text Available O contínuo ecológico da Serra deParanapiacaba, no sul do Estado de São Paulo,é uma área de extrema importância para aconservação das aves. Dentro do contínuo, a EstaçãoEcológica de Xitué é a Unidade de Conservaçãocuja avifauna é menos conhecida. Em levantamentoefetuado em 2006 foram registradas em Xitué48 espécies endêmicas da Mata Atlântica e 8ameaçadas de extinção. Apesar de ser a espécievegetal dominante em vastos trechos da estação,o taquaruçu Guadua tagoara (Nees Kunth parececontribuir pouco para a riqueza de espécies de avesencontradas. No entanto, entre estas espécies seencontra o criticamente ameaçado papa-capim-dataquaraSporophila falcirostris, granívoroespecializado em sementes de taquaras.The Paranapiacaba Range ecologicalcontinuum, in State of São Paulo southernBrazil, is an extremely important area to birdconservation. In Paranapiacaba Range the birds ofXitué Ecological Station remains poorly known.We surveyed the Xitué birds in 2006 and we found48 Atlantic Forest endemics species and 8 threatened.Although the bamboo Guadua tagoara (NeesKunth dominate many areas of Xitué, it contributedtoo little for bird richness. However, between thesebird species was the critically endangered Temminck’sSeedeater Sporophila falcirostris, specializedbamboo granivorous.

  18. Virginia ESI: BIRDS (Bird Polygons)

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — This data set contains sensitive biological resource data for wading birds, shorebirds, waterfowl, raptors, diving birds, pelagic birds, passerine birds, and gulls...

  19. Composição química e valores de energia metabolizável de subprodutos agroindustriais determinados com diferentes aves - DOI: 10.4025/actascianimsci.v30i3.679 Chemical composition and values of metabolizable energy of alternative feedstuffs determined with different birds - DOI: 10.4025/actascianimsci.v30i3.679

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    Irani Ribeiro Vieira Lopes

    2008-11-01

    Full Text Available Este experimento foi conduzido com o objetivo de determinar a composição química e os valores de energia metabolizável aparente (EMA e aparente corrigida pelo balanço de nitrogênio (EMAn do farelo da castanha de caju (FCC, do farelo de coco (FC e de dois tipos de levedura da cana-de-açúcar (LEV1 e LEV2 para pintos, galos e codornas japonesas. Três ensaios de metabolismo foram realizados utilizando a metodologia de coleta total de excretas. Os tratamentos consistiram em uma ração-referência e quatro rações-teste (40% do subproduto e 60% da ração-referência. Para todos os alimentos avaliados, os valores de EMA e EMAn determinados com codornas e galos foram superiores aos determinados com pintos. Para o FC e LEV2, os valores de EMA e EMAn obtidos com codornas foram inferiores aos obtidos com galos; entretanto, para o FCC, obtiveram-se maiores valores de EMA e EMAn com codornas. Independentemente do tipo de ave, os valores de EM determinados para a LEV1 foram superiores aos da LEV2.This experiment was conducted to determine the chemical composition and the values of apparent metabolizable energy (AME and nitrogen-corrected apparent metabolizable energy (AMEn of cashew nut meal (CNM, coconut meal (CONM and two types of sugar cane yeast (SCY1 and SCY2 for chicks, roosters end Japanese quail. Three digestibility trials were carried out using the methodology of the total excreta collection. Treatments consisted of a reference-diet and four test-diets (40% of feedstuffs and 60% of reference-diet. The values of metabolizable energy determined with Japanese quail and roosters were higher than those obtained with chicks. For CONM and SCY2, the AME and AMEn determined with Japanese quails were lower than those determined for roosters, but the highest values of AME and AMEn for CNM were obtained with Japanese quail. Independente of the bird type the SCY1 showed higher values of AME and AMEn than those of SCY2.

  20. Associations between chewing lice (Insecta, Phthiraptera and albatrosses and petrels (Aves, Procellariiformes collected in Brazil Associações entre malófagos (Insecta, Phthiraptera e albatrozes e petréis (Aves, Procellariiformes capturados no Brasil

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    Michel P. Valim

    2006-12-01

    Full Text Available Chewing lice were searched on 197 skins of 28 species of procellariiform birds collected in Brazil. A total of 38 species of lice were found on 112 skins belonging to 22 bird species. The lice were slide-mounted and identified. A list of lice species found and their host species is given and some host-louse associations are discussed under an evolutionary perspective.Malófagos foram procurados em 197 peles de 28 espécies de aves Procellariiformes capturadas no Brasil. Um total de 38 espécies de piolhos foram encontradas em 112 peles pertencentes a 22 espécies de aves. Os piolhos foram montados em lâminas e identificados. Uma lista com as espécies de piolhos encontradas e seus hospedeiros é dada, além de algumas associações entre os piolhos e as aves serem discutidas sob uma perspectiva evolutiva.

  1. Efeitos da exploração madeireira de baixo impacto sobre uma comunidade de aves de sub-bosque na Floresta Nacional do Tapajós, Pará, Brasil Effects of low impact selective logging on an understory bird community in the Tapajós National Forest, Pará, Brazil

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    Luiza Magalli Pinto Henriques

    2008-01-01

    Full Text Available Este estudo compara a resposta de uma comunidade aves à exploração madeireira de baixo impacto através da distribuição das espécies em floresta controle e manejada ao longo de cinco anos com amostragem pré e pós-exploração. O procedimento de ordenação mostrou que a similaridade da comunidade de aves após a exploração madeireira foi menor que a similaridade entre as amostras do período de pré-exploração. Além disso, a ordem das abundâncias das 43 espécies mais comuns foi alterada entre o período anterior à exploração e 3 a 4 anos após a exploração na floresta manejada. A exploração afetou as taxas de captura de 20 espécies, diretamente ou através de uma interação com o tempo. Os insetívoros terrícolas e os insetívoros que seguem bandos mistos foram as guildas mais afetadas pela exploração madeireira. Ambas as guildas mostraram declínio, correlacionado com o tempo, em suas abundâncias em floresta manejada. Insetívoros seguidores de formigas e insetívoros arborícolas não apresentaram diferenças entre a floresta manejada e controle, apesar de algumas espécies dessas guildas terem apresentado efeitos relacionados ao manejo florestal, diretamente ou através de uma interação entre o tempo e o manejo. Frugívoros também não apresentaram efeitos significativos relacionados ao manejo florestal. Nectarívoros aumentaram tanto na floresta explorada como na floresta controle. Efeitos temporais de aumento ou declínio observados em guildas e em 12 espécies ocorreram tanto na floresta controle como na floresta explorada. Este resultado sugere que mudanças temporais na área explorada podem estar relacionadas à sucessão enquanto que mudanças temporais na floresta controle podem estar relacionados à exploração com intensidade de 40m³/ha de parcelas adjacentes.This study compares the avian response to low impact selective logging by comparing bird species distribution in control and cut forest during

  2. Acerca del Ave Fénix en las tradiciones islámicas

    Directory of Open Access Journals (Sweden)

    Buendía, Pedro

    2011-06-01

    Full Text Available In Western cultural milieus it has been customary to identify the Arabian legend of the giant bird ʻAnqāʼ Mugrib as a version of the mythical Phoenix known from Greco-Latin sources. Linking these two together is based almost exclusively on the Phoenix supposedly coming from Arabia. However, a detailed analysis of the sources clearly shows that the two myths are essentially different, and describe two birds that are completely divergent in shape, mythical development and textual significance. Although the ʻAnqāʼ has merged in some texts with the myth of the Phoenix, because of its long life, Arab and Persian literature also speak of a bird known as qaqnus which has essentially the same characteristics as the one in the Greco-Latin myth of the Phoenix. The qaqnus bird, in addition, is usually mentioned as another bird along with the ʻAnqāʼ, making clear that it is different and separate from this.

    En medios culturales occidentales, ha sido costumbre identificar la leyenda árabe del ave gigante ʻAnqāʼ Mugrib con el mito del ave Fénix tal y como se conoce en las fuentes grecolatinas. Dicha identificación se basa casi exclusivamente en la presunta procedencia del Fénix de Arabia. Sin embargo, un detallado análisis de los textos muestra de forma clara que ambos mitos son esencialmente diferentes y describen a dos aves que formal y estructuralmente son completamente distintas. Aunque la leyenda de la ʻAnqāʼ se contamina en algunos textos con el mito de la vetusta edad del Fénix, las literaturas árabe y persa conocen un ave llamada qaqnus cuyas características concuerdan esencialmente con las del mito grecolatino del Fénix. Esta ave qaqbus además, suele ser mencionada como un ave diferente y aparte de la ʻAnqāʼ.

  3. Masayo Ave õpetab puudutama / Lylian Meister

    Index Scriptorium Estoniae

    Meister, Lylian, 1966-

    2007-01-01

    Jaapani disainerist ja arhitektist Masayo Avest, tema mõtteid disainist, arvamus eestlastest. 2006. a. juhendas M. Ave Eesti Kunstiakadeemias workshop'i, kus osalesid tootedisaini ja tekstiilieriala üliõpilased. Talve tekstuuride väljendamiseks sündis "Haptic Dictionary" ja näitus Tallinnas Arhitektuuri- ja Disainigaleriis. 15 ill., neist 9 M. Ave töödest

  4. Osteologia craniana de Nyctibiidae (Aves, Caprimulgiformes

    Directory of Open Access Journals (Sweden)

    Thiago Vernaschi Vieira da Costa

    2009-01-01

    Full Text Available A família Nyctibiidae (urutaus apresenta sete espécies incluídas em um único gênero Nyctibius, distribuídas por toda a região neotropical desde o México até a Argentina, alcançando sua maior diversidade na região amazônica. São aves de hábito noturno caracterizadas por um distintivo mimetismo em troncos vegetais, onde permanecem imóveis durante o período diurno. Devido seus hábitos noturnos e comportamentos crípticos, o estudo de seus hábitos de vida é excessivamente difícil, o que faz desse grupo um dos menos conhecidos da região tropical. Logo, informações sobre comportamento e história natural da família são muito escassas, e raras são as contribuições a respeito de sua anatomia. O objetivo do presente trabalho foi descrever detalhadamente a osteologia craniana de seis das sete espécies de Nyctibiidae reconhecidas, incluindo Nyctibius griseus, N. grandis, N. aethereus, N. jamaicensis, N. leucopterus e N. bracteatus. Observa-se uma grande variação na osteologia craniana dentro da família, a qual apresenta um crânio bastante modificado e adaptado aos seus hábitos de vida, basicamente no que se refere a abrigar os olhos extremamente desenvolvidos e a proporcionar uma grande abertura bucal. Os ossos que formam o teto da cavidade bucal apresentam um achatamento dorso-ventral, particularmente nos ossos pterigóide e paraesfenóide, e o osso palatino é muito desenvolvido lateralmente. Na região de fusão da maxila com o arco jugal observa-se uma projeção, única entre as aves, a qual é vista até externamente com a ave em vida. O osso vômer tem grande variação dentro da família, apresentando um número variável de projeções rostrais entre as espécies. A região caudal do crânio é bastante larga, havendo grande distância entre os ossos quadrados, os quais são verticalmente posicionados e apresentam um reduzido processo orbital. A mandíbula, elástica e flexível, apresenta uma curta regi

  5. REGISTROS NUEVOS O POCO CONOCIDOS DE AVES MIGRATORIAS EN LA LAGUNA DEL OTÚN, PARQUE NACIONAL NATURAL LOS NEVADOS, RISARALDA, COLOMBIA Records of New or Poorly Known Migratory Birds from Laguna del Otún, los Nevados National Natural Park, Risaralda, Colombia

    Directory of Open Access Journals (Sweden)

    ORLANDO ACEVEDO-CHARRY

    2013-04-01

    Full Text Available Colombia es un sitio importante para las aves migratorias. Sin embargo, aún falta mucho conocimiento de dónde estas se encuentran durante su paso o permanencia por el país y cuáles utilizan los páramos. Registramos nuevas especies de aves migratorias para la laguna del Otún, inmersa en un complejo de humedales declarados sitio Ramsar desde el 2008. La laguna está localizada en el Parque Nacional Natural Los Nevados a 3932 msnm, en ecosistema de páramo, en la Cordillera Central de los Andes de Colombia. Durante cinco salidas entre 2010 y 2012 se registraron cuatro nuevas especies de aves migratorias para el parque: Anas acuta, Pandion haliaetus, Riparia riparia y Dendroica petechia. Adicionalmente, se registró una ampliación del rango altitudinal para dos especies migratorias que solo habían sido registradas en la región a menos de 3500 msnm: Tringa flavipes e Hirundo rustica. Estas observaciones sugieren que dichas especies podrían tolerar condiciones de alta montaña y utilizar el páramo. Es necesario estudiar a fondo las dinámicas migratorias y el uso de hábitat de alta montaña por las aves migratorias.

  6. Maryland ESI: BIRDS (Bird Polygons)

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — This data set contains sensitive biological resource data for wading birds, shorebirds, waterfowl, raptors, diving birds, seabirds, passerine birds, and gulls and...

  7. Alabama ESI: BIRDS (Bird Polygons)

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — This data set contains sensitive biological resource data for wading birds, shorebirds, waterfowl, raptors, diving birds, seabirds, passerine birds, gulls, and...

  8. Notas sobre aves de colombia

    OpenAIRE

    Borrero H., José Ignacio; Olivares, Antonio; Hernández Camacho, Jorge

    2012-01-01

    We present some notes concerning principally with the distribution and systematic position of some species or subspecies of birds from the valley of the Magdalena river in the Departments of Santander, Cundinamarca and Tolima in Colombia.  The field-work in Santander was carried under the auspices of the Instituto Carlos Finlay of Bogotá, Colombia.

  9. Enigmatic phylogeny of skuas (Aves Stercorariidae)

    NARCIS (Netherlands)

    Cohen, BL; Baker, AJ; Bleschschmidt, K; Dittmann, DL; Furness, RW; Gerwin, JA; de Korte, J.; Marshall, HD; Palma, RL; Peter, HU; Ramli, R; Siebold, [No Value; Willcox, MS; Wilson, RH; Zink, RM

    1997-01-01

    Multiple sources of evidence show that the skuas (Aves: Stercorariidae) are a monophyletic group, closely related to gulls (Laridae). On morphological and behavioural evidence the Stercorariidae are divided into two widely divergent genera, Catharacta and Stercorarius, consistent with observed level

  10. Surveillance of arbovirus infections in the atlantic forest region, State of São Paulo, Brazil: I. detection of hemagglutination-inhibition antibodies in wild birds between 1978 and 1990 Vigilância de infecções por arbovírus na Região da Mata Atlântica, Estado de São Paulo, Brasil.: I. Detecção de anticorpos inibidores de hemaglutinação em aves silvestres entre 1978 e 1990

    Directory of Open Access Journals (Sweden)

    Ivani B. Ferreira

    1994-06-01

    Full Text Available We report data related to arbovirus antibodies detected in wild birds periodically captured from January 1978 to December 1990 in the counties of Salesópolis (Casa Grande Station, Itapetininga and Ribeira Valley, considering the different capture environments. Plasmas were examined using hemagglutination-inhibition (HI tests. Only monotypic reactions were considered, except for two heterotypic reactions in which a significant difference in titer was observed for a determined virus of the same antigenic group. Among a total of 39,911 birds, 269 birds (0.7% belonging to 66 species and 22 families were found to have a monotypic reaction for Eastern equine encephalitis (EEE, Venezuelan equine encephalitis (VEE, Western equine encephalitis (WEE, Ilheus (ILH, Rocio (ROC, St. Louis encephalitis (SLE, SP An 71686, or Caraparu (CAR viruses. Analysis of the data provided information of epidemiologic interest with respect to these agents. Birds with positive serology were distributed among different habitats, with a predominance of unforested habitats. The greatest diversity of positive reactions was observed among species which concentrate in culture fields.Apresentam-se os resultados referentes a anticorpos para arbovírus em aves silvestres capturadas, periodicamente, de janeiro de 1978 a dezembro de 1990, nos municípios de Salesópolis (Estação de Casa Grande; Itapetininga e municípios do Vale do Ribeira, considerando-se os diferentes ambientes de captura. Plasmas foram examinados, por testes de Inibição de Hemaglutinação (IH. Considerou-se apenas as reações monotípicas, com exceção de duas reações heterotípicas, onde ocorreu uma diferença de título significativa para um determinado vírus de um mesmo grupo antigênico. Em um total de 39.911 aves, foram encontradas 269 aves pertencentes a 66 espécies e 22 famílias, com reação monotípica para os vírus Encefalite Equina do Leste (EEE, Encefalite Equina Venezuelana (VEE

  11. Análise comparativa da assembléia de aves em dois remanescentes florestais no interior do Estado de São Paulo, Brasil Comparative analysis of birds community in two forested fragments in the State of São Paulo, Brazil

    OpenAIRE

    Reginaldo J. Donatelli; Carolina D. Ferreira; Andreli C. Dalbeto; Sérgio R. Posso

    2007-01-01

    Realizou-se o levantamento quantitativo e qualitativo da comunidade de aves de dois fragmentos de floresta estacional semidecídua no interior do estado de São Paulo de julho de 2004 a julho de 2005. Para o estudo quantitativo utilizou-se da metodologia de Pontos de Escuta. Foram analisados os índices de diversidade e de freqüência de ocorrência dessa comunidade. O levantamento qualitativo registrou 181 espécies na Fazenda Rio das Pedras - FRP (Itapetininga, 350 ha) e 126 espécies na Fazenda S...

  12. 阿维链霉菌aveD基因的定点突变%Site-directed Mutagenesis of Streptomyces avermitilis aveD Gene

    Institute of Scientific and Technical Information of China (English)

    汤晖; 张利平

    2011-01-01

    [Objective] The aim of this study was to produce Streptomyces avermitilis strain with site-directed mutagenesis in aveD gene,and so as to provide theoretical basis for genetic breeding of S.avermitilis.[Method] PCR-driven overlap extension was conducted for the site-directed mutagenesis in aveD gene;the mutated aveD gene then was used to construct vector pDC3(pKC1139∷aveD) via molecular manipulations like in vitro enzyme digestion and ligation;the vector pDC3(pKC1139∷aveD) was then introduced to aveD deletion mutant 489 of avermectin-producing strain S.avermitilis 76-9.[Result] Mutant strain 536 of site-directed mutagenesis of S.avermitilis 76-9 was obtained by homologous recombination.The sequencing results show that the sixty-ninth base C in aveD-coding region of mutant 536 was substituted by T,and the corresponding amino acid Thr was mutated to be Ile.[Conclusion] This study laid basis for the development of strains specifically producing avermectin B.%[目的]获得aveD基因定点突变株,为阿维菌素的遗传育种提供理论依据。[方法]采用重叠延伸PCR技术对aveD基因进行定点突变,并通过体外酶切连接等分子生物学操作,构建了aveD基因的定点突变载体pDC3(pKC1139∷aveD、),导入阿维菌素(Avermectin)产生菌阿维链霉菌(Streptomyces avermitilis)76-9的aveD基因缺失突变株489中。[结果]经过同源重组,获得aveD基因定点缺失突变株536。测序结果表明突变株536,aveD基因编码区中第69位碱基C突变为T,相应的氨基酸序列第23位由Thr突变为Ile。[结论]该研究为研制生产阿维菌素B的基因工程菌奠定了基础。

  13. Sobrevoando Auschwitz: As aves da noite

    Directory of Open Access Journals (Sweden)

    Berta Waldman

    2007-10-01

    Full Text Available Resumo: Em As Aves da noite (1968, texto que é objeto de minha análise, Hilda Hilst mostra-se precursora no que diz respeito à matéria escolhida. Sua peça passa-se em Auschwitz e se refere ao Holocausto, num momento em que poucos escritores o tematizavam na literatura brasileira.

  14. "Vaesus on disainerile parim aeg" / Masayo Ave

    Index Scriptorium Estoniae

    Ave, Masayo

    2007-01-01

    Masayo Ave oma elust Euroopas, probleemidest ja kohalike väärtuste arendamisest disainis ja sellest, et puudus paneb aju tööle. Illustratsioonidel valik tema toodetest - öövalgusti Fish Eye, täispuhutav pall-iste, laua- ja seinalamp Genesi, päevapadi Toft jt.

  15. Experiência de manejo de aves em áreas antrópicas, com a utilização de caixas de madeira como locais para nidificação Experimental birds managment in anthropic areas, using nest-boxes

    Directory of Open Access Journals (Sweden)

    Luiz Octavio Marcondes-Machado

    1994-01-01

    Full Text Available Use of nest-boxes for management of cavity nesting birds in anthropic areas can give good results. In November 1987, data collection begun in UNICAMP, Campinas (São Paulo, with the objective of favouring establishment and increase in urban bird communities. The House Wren (Troglodytes aedon Viellot. 1807 and House Sparrow (Passer domesticus Linnaeus, 1758 used the nest boxes for reproduction. Nests were collected and analysed (weight, used materials, incubation chamber materials, nest form. House Sparrow used thin materials, like straw, paper and plastic, while house wren used heavy materials, like sticks, wire and tabs of soff drink cans. The nest-boxes offered favorable conditions to bird reproduction and protection in disturbed areas, and showed signs of leading to increase in diversity of species, that might use this nest-boxes for reproduction in the future.

  16. Bird guard

    Science.gov (United States)

    Fairchild, Dana M.

    2010-03-02

    The bird guard provides a device to protect electrical insulators comprising a central shaft; a clamp attached to an end of the shaft to secure the device to a transmission tower; a top and bottom cover to shield transmission tower insulators; and bearings to allow the guard to rotate in order to frighten birds away from the insulators.

  17. Enigmatic phylogeny of skuas (Aves:Stercorariidae)

    OpenAIRE

    Cohen, B L; Baker, A. J.; Blechschmidt, K.; Dittmann, D L; Furness, R.W.; Gerwin, J A; Helbig, A J; Korte, J. de; Marshall, H D; Palma, R.L.; Peter, H U; R. Ramli; Siebold, I; Willcox, M S; Wilson, R.H.

    1997-01-01

    Multiple sources of evidence show that the skuas (Aves:Stercorariidae) are a monophyletic group, closely related to gulls (Laridae. On morphological and behavioural evidence the Stercorariidae are divided into two widely divergent genera, Catharacta and Stercorarius, consistent with observed levels of nuclear and mitochondrial gene divergence. Catharacta skuas are large-bodied and with one exception breed in the Southern Hemisphere. Stercorarius skuas otherwise known as jaegers) are smaller b...

  18. Talking Birds

    Institute of Scientific and Technical Information of China (English)

    海文

    2005-01-01

    Many students of Englishthink thatlearning a new languageis very difficult.N ow think howdifficultitis to learn English whenyour brain is only the size of abird's brain。That is what som ebirds can do.M any different kinds of birdscan copy the sounds of lan-guage.A frican gray parrots are thebirds bestknown for this.Every D ecem ber in London,the N ationalCage and A viary BirdShow tries to find the best“talkbird in the world.O ne bird nam edPrudle stood outam ong the“talk-ing birds by winning this prizeevery...

  19. Distribuição espacial de aves em um fragmento florestal do campus da Universidade Estadual de Londrina, Norte do Paraná, Brasil Spatial distribution of birds in a forest fragment at Londrina State University campus, Northern Paraná State, Brazil

    Directory of Open Access Journals (Sweden)

    Márcio Rodrigo Gimenes

    2000-03-01

    Full Text Available Spatial distribution of birds was studied in 10 ha forest fragment at Londrina State University, southem Brazil (23º15'S, 51º10'W. Five habitats were categorized in the forest fragment: four related to the edges and one related to the forest interior. A line transect, crossing ali these habitats, was used to identify the bird species one day each two weeks from September 1996 to September 1997 totaling 57 days of samplings. The forest was divided into three leveis: understory (bellow 3 m, mid-levels (3-7 m and canopy (above 7 m. Occurrence frequencies in each habitat and each forest levei were calculated for each of the 62 species identified during the field work. The number of species in each levei was similar (43 species in the understory, 42 at mid-levels and 40 in the canopy. Edges had higher number of species (51, 46, 33 and 30 species and most of them with more than 50% of occurrence frequency. By contrast, forest had the lowest number of bird species (29 species, 80% of them with less than 50% of occurrence frequency, what suggest that the edge effect is strong on this forest fragment.

  20. Hawaii ESI: BIRDS (Bird Polygons)

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — This data set contains sensitive biological resource data for endangered waterbirds and passerine birds, migratory shorebirds and waterfowl, gulls and terns,...

  1. El sistema inmune digestivo en las aves

    OpenAIRE

    Gabriela Gómez Verduzco; Carlos López Coello; Carmen Maldonado Bernal; Ernesto Ávila González

    2010-01-01

    El conocimiento del sistema inmune digestivo en las aves es un área de oportunidad considerando que en este lugar no sólo se realiza la función digestiva, sino que representa un ecosistema muy complejo donde interactúan bacterias benéficas y patógenas, mecanismos de resistencia y de respuesta inmune específica así como neuroendócrinos, con el objetivo de mantener un estado de homeostasis a nivel del tubo digestivo. En este trabajo, se hace una revisión de los principales aspectos generales de...

  2. Histología de las aves

    OpenAIRE

    González, Norma; Barbeito, Claudio

    2014-01-01

    La obra que tengo el honor de prologar pretende ser un aporte bibliográfico importante que ayude a llenar este vacío [la falta de bibliografía sobre aves] en la literatura de habla hispana dedicada a la enseñanza de grado. Siguiendo los enfoques más modernos de la disciplina aborda el conocimiento específico no solamente desde el punto de vista descriptivo sino orientado a la interpretación funcional, lo que facilita la comprensión y el abordaje posterior de los contenidos propios de materias...

  3. O Comportamento das Aves Poultry Behavior

    Directory of Open Access Journals (Sweden)

    EJ Campos

    2000-08-01

    Full Text Available Os estudos sobre o comportamento das aves, principalmente as galinhas, datam de 1912, quando o gênero Gallus passou a ser estudado com mais intensidade na área da Genética. Tais estudos eram simplesmente filosóficos até o início da década de 80, quando uma nova era da produção industrial avícola surgiu, objetivando um maior volume de produção econômica em todas as áreas de exploração. Esse objetivo reativou de maneira científica os estudos de comportamento das aves face à tecnologia de produção empregada nos sistemas de exploração, tornando-os mais acentuados já na década de 90, culminando com um simpósio internacional realizado nos Estados Unidos onde foram traçados os objetivos ou linhas de pesquisas na exploração avícola. O intuito era evitar problemas com os movimentos ambientalistas, traçando novos rumos para uma produção eficiente sem interferir no comportamento das aves já no início do novo milênio. Esta revisão, tem como objetivo principal uma análise científica e filosófica sobre o comportamento das aves em diversos métodos de exploração.Studies on poultry behavior initiated in 1972, at that time, fowls from Gallus domesticus species were the most important animal for the initial studies of Genetic. Since then, just the philosophical concepts where involved in those studies. However, at the beginning of 80 decade, these studies were intensified taking into account technological approaches for an economical industrial poultry production. Meanwhile, the reactions from activists involved in the behavior of the animal subjected to production became more strong at the beginning of 90's as well as those studies on chicken behavior. Finally, in 1998, an international symposium, promoted by chicken behavior scientists were held in the United States, in order to establish new methods of exploitation of poultry without interfering in its normal behavior, at the beginning of new millenium. The main

  4. Columbia River ESI: BIRDS (Bird Polygons)

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — This data set contains sensitive biological resource data for wading birds, shorebirds, waterfowl, diving birds, seabirds, passerine birds, gulls, and terns in...

  5. Western Alaska ESI: BIRDS (Bird Polygons)

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — This data set contains sensitive biological resource data for wading birds, shorebirds, waterfowl, raptors, diving birds, seabirds, passerine birds, and gulls and...

  6. Uso do fixador esquelético externo Tipo II para osteossíntese de tibiotarso em galinhas da raça Plymouth Rock Branca: modelo experimental para uso em aves selvagens Use of Type II external skeletal fixator for tibiotarsus osteosynthesis in White Plymouth Rock chickens: an experimental model for using in wild birds

    Directory of Open Access Journals (Sweden)

    Juliano B. De Conti

    2007-05-01

    Full Text Available Foi avaliada a eficiência do fixador esquelético externo Tipo II para o tratamento de fratura de tibiotarso em oito galinhas adultas da raça Plymouth Rock Branca. As aves foram pré-medicadas com sulfato de morfina e anestesiadas com halotano. Em seguida, foi realizada osteotomia na diáfise do tibiotarso esquerdo, por meio de serra oscilatória. Quatro pinos de Kirschner foram inseridos através das corticais ósseas, dois proximalmente e dois distalmente ao foco da fratura. Após a redução desta, as extremidades dos dois pinos proximais e distais foram torcidas em direção distal ou proximal, respectivamente, sendo os pinos conectados externamente por meio de duas barras de acrílico autopolimerizável, nas faces lateral e medial externa do membro. O retorno da plena capacidade de utilização do membro foi observado em 20,00±7,09 dias, e a cicatrização óssea, avaliada por exame radiográfico, ocorreu em 35,12±8,72 dias. Os resultados do experimento demonstraram que redução aberta e aplicação de fixador esquelético externo Tipo II é método efetivo para o tratamento de fraturas de tibiotarso em galinhas da raça Plymouth Rock Branca.The efficiency of the Type II external skeletal fixator for the treatment of tibiotarsus fracture in eight adult White Plymouth Rock chickens was evaluated. The individuals were pre-medicated with morphine sulfate and anesthetized with halothane, and submitted to a diaphysary osteotomy in the left tibiotarsus, performed with an oscillatory saw. Four Kirschner wires were inserted through the bone cortices, being two proximally and two distally to the fracture. After the fracture reduction the ends of both proximal and distal wires were twisted in distal or proximal direction, respectively, being the wires connected by two bars of autopolymerizing acrylic resin, in the external lateral and medial faces of the limb. The return to full capability to use the member was observed in 20.00±7.09 days, and

  7. Factores técnicos y ambientales implicados en la electrocución de aves en los tendidos eléctricos

    Directory of Open Access Journals (Sweden)

    Izquierdo Rosigue, A.

    1997-10-01

    Full Text Available Technical and environmental factors responsible of bird electrocution have been analyzed in low and medium tension power lines in a bird important area placed in the south of Alicante province (SE Spain. One hundred eighty six dead birds (119 birds of prey have been located in 182 poles inspected. Most species are legally protected and some are in jeopardy. Some pole types with suspended insulators have caused the same number of victims than poles with rigid insulators. Poles with rigid insulators in two levels produce more accidents than poles with one level. A different pole use according to the habitat has been observed. Birds of prey avoid poles in cultures, in the vicinity of roads and in flatlands or in hill tops. Furthermore, more electrocutions occur near bath zones. Poles in high places and located near to human altered habitats, where feeding is easy, are preferred by remainder birds.

    Se analizan los factores técnicos y ambientales responsables de la electrocución de aves en tendidos de media y baja intensidad -situados en un área con una valiosa población de aves- en el sur de la provincia de Alicante. Se han localizado 186 aves muertas (119 rapaces en 182 postes visitados. La mayoría han sido especies protegidas, encontrándose, algunas de ellas, especialmente amenazadas. Los resultados muestran que algunos tipos de poste, con aisladores suspendidos, provocan un número de accidentes similar a otros tipos de postes con aisladores rígidos. Los postes con aisladores rígidos en dos planos producen más víctimas que los que presentan un único plano. Se observa que las aves realizan un uso diferente del poste en función del hábitat que lo rodea. Las rapaces evitan los postes situados sobre cultivos, los más próximos a las carreteras y los ubicados en zonas llanas o en las partes más altas de las laderas. Se encuentran más rapaces electrocutadas en aquellos postes próximos a zonas de baño. Para el resto de aves los

  8. Human population, economic activities, and wild bird conservation in Mexico: factors influencing their relationships at two different geopolitical scales Población humana, actividades económicas y conservación de aves silvestres en México: factores que influencian sus relaciones en dos escalas geopolíticas diferentes

    Directory of Open Access Journals (Sweden)

    Xavier López-Medellín

    2011-12-01

    Full Text Available Population growth poses threats to biodiversity, specifically to sensitive species. Therefore, an understanding of the conflict between biodiversity and human population is needed to enable long-term planning of development and conservation policies by state and federal governments and society based on limitations and potentials of environments. We used a geopolitical approach to analyze data on human demography, economic activities, natural vegetation, avian diversity, and protected areas of the 32 states of Mexico and the 30 districts of the state of Oaxaca. Using factor analysis, we identified the biodiversity-rich geopolitical units that have a large human population and are developing intense economic activities. We then carried out a series of linear regressions between the resulting factors to test whether they were related, suggesting areas where conservation conflicts may exist, and found that relations between human activities and natural resources vary from region to region. These results help us identify geopolitical units that require detailed studies of the interactions between population and natural resources, and also highlight the importance of using geopolitical scales as study units, where most conservation and development policies are determined, to inform local stakeholders and decision makers.El crecimiento humano representa amenazas para la biodiversidad, especialmente para especies sensibles. Se necesita conocer a fondo el conflicto que representa el crecimiento de la población para la biodiversidad y llevar a cabo políticas y acciones a largo plazo de actividades de desarrollo y conservación evaluadas por gobiernos federales y estatales, basándose en las limitaciones y potenciales de los ecosistemas. Utilizamos una aproximación geopolítica para analizar variables de demografía humana, actividades económicas, superficie de vegetación, diversidad de aves y áreas protegidas de los 32 estados de México y los 30

  9. Síndrome de Mala Absorción en aves - Malabsorption síndrome in poultry

    Directory of Open Access Journals (Sweden)

    Bustamante García, Daymara

    2010-12-01

    Full Text Available ResumenLa industria avícola sufre pérdidas económicas anuales por Síndrome de Mala Absorción en casi todos los países del mundo. Es una entidad multifactorial, típica de aves jóvenes, ocasionada por diferentes agentes infecciosos (virus, bacterias, protozoarios, micotoxinas y otros factores ambientales.SummaryObjetive is to provide current scientific information on malabsorptionsyndrome. Poultry industry suffers significant economic losses annually for malabsorption syndrome in many countries. Multifactorial disease, typical of young birds, caused by different infectious agents such as viruses, bacteria, mycotoxins and other environmental factors.

  10. Osteologia craniana de Nyctibiidae (Aves, Caprimulgiformes)

    OpenAIRE

    Thiago Vernaschi Vieira da Costa; Reginaldo José Donatelli

    2009-01-01

    A família Nyctibiidae (urutaus) apresenta sete espécies incluídas em um único gênero Nyctibius, distribuídas por toda a região neotropical desde o México até a Argentina, alcançando sua maior diversidade na região amazônica. São aves de hábito noturno caracterizadas por um distintivo mimetismo em troncos vegetais, onde permanecem imóveis durante o período diurno. Devido seus hábitos noturnos e comportamentos crípticos, o estudo de seus hábitos de vida é excessivamente difícil, o que faz desse...

  11. Blood parasites in passerine birds from the Brazilian Atlantic Forest Hemoparasitos em passeriformes da Mata Atlântica Brasileira

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    Fabiane Sebaio

    2012-03-01

    Full Text Available Parasites may lead bird species to extinction, affect host temporal and spatial population dynamics, alter community structure and alter individuals’ social status. We evaluated blood parasite prevalence and intensity according to bird families and species, among 925 birds that were caught in 2000 and 2001, in the Atlantic Forest in the State of Minas Gerais, Brazil. We applied Giemsa staining to thin blood smears, to detect blood parasites. The birds (n = 15.8% in 11 families, were infected by at least one parasite genus, especially Muscicapidae (28.3% and Conopophagidae (25%. Among the 146 infected birds, Plasmodium was detected in all bird families and had the highest prevalence (54.8%. Trypanosoma, Haemoproteus and microfilaria had lower prevalence rates (23.3, 23.3 and 2.1%, respectively. Birds caught during the rainy season were more infected than birds caught during the dry season. The overall low prevalence of blood parasites in birds is similar to the patterns found elsewhere in the Neotropical region.Parasitos podem levar espécies de aves à extinção, afetar as dinâmicas temporais e espaciais dos hospedeiros, alterar a estrutura de comunidades e o status social de indivíduos. Avaliou-se a prevalência e a intensidade de parasitos em famílias e espécies de 925 aves capturadas, entre 2000 e 2001, na Mata Atlântica de Minas Gerais. Foram coradas com Giemsa extensões de sangue para detectar parasitos hematozoários. As aves (n= 15,8% 11 famílias estavam infectadas por pelo menos um gênero de parasito, especialmente Muscicapidae (28,3% e Conopophagidae (25%. Entre as 146 aves infectadas, Plasmodium foi detectado em todas as famílias e possuiu a maior prevalência (54,8%. Trypanosoma,Haemoproteus e microfilaria possuíram baixas prevalências (23,3, 23,3 e 2,1%, respectivamente. Aves capturadasdurante a estação chuvosa estavam mais infectadas do que aves capturadas durante a estação seca. A baixa prevalência geral de

  12. BIRD FLU (AVIAN INFLUENZA)

    OpenAIRE

    Ali ACAR; Bulent BESIRBELLIOÐLU

    2005-01-01

    Avian influenza (bird flu) is a contagious disease of animals caused by influenza A viruses. These flu viruses occur naturally among birds. Actually, humans are not infected by bird flu viruses.. However, during an outbreak of bird flu among poultry, there is a possible risk to people who have contact infect birds or surface that have been contaminated with excreations from infected birds. Symptoms of bird flu in humans have ranged from typical flu-like symptoms to eye infections, pneumonia, ...

  13. Study of the karyotype of Oryzoborus maximiliani (Passeriformes - Aves using young feather pulp cultures

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    Beatriz Goldschmidt

    2000-06-01

    Full Text Available The investigation of the karyotype of Oryzoborus maximiliani in living birds utilizing young feather pulp culture is described. The species karyotype was established as 2n = 72 with unequivocal identification of the sexual chromosome pair. Evolutionary considerations are raised.Foram estudados citogeneticamente vinte exemplares da espécie Oryzoborus maximiliani provenientes de criatórios do Estado do Rio de Janeiro. Foi aplicada a técnica de cultura de curta duração de polpa de penas jovens, permitindo a investigação nas aves vivas. O cariótipo da espécie foi estabelecido (2n = 72 com identificação do par sexual. Considerações evolutivas são abordadas.

  14. Certhiasomus, a new genus of woodcreeper (Aves: Passeriformes: Dendrocolaptidae)

    Science.gov (United States)

    Derryberry, Elizabeth; Claramunt, Santiago; Chesser, R. Terry; Aleixo, Alexandre; Cracraft, Joel; Moyle, Robert G.; Brumfield, Robb T.

    2010-01-01

    Phylogenetic analysis of the family Dendrocolaptidae (Aves: Passeriformes) indicates that the two species traditionally placed in the genus Deconychura are not sister taxa. Certhiasomus, a new genus of woodcreeper, is described for one of these species, C. stictolaemus.

  15. Low ecological disparity in Early Cretaceous birds.

    Science.gov (United States)

    Mitchell, Jonathan S; Makovicky, Peter J

    2014-07-22

    Ecological divergence is thought to be coupled with evolutionary radiations, yet the strength of this coupling is unclear. When birds diversified ecologically has received much less attention than their hotly debated crown divergence time. Here, we quantify how accurately skeletal morphology can predict ecology in living and extinct birds, and show that the earliest known assemblage of birds (=pygostylians) from the Jehol Biota (≈125 Ma) was substantially impoverished ecologically. The Jehol avifauna has few representatives of highly preservable ecomorphs (e.g. aquatic forms) and a notable lack of ecomorphological overlap with the pterosaur assemblage (e.g. no large or aerially foraging pygostylians). Comparisons of the Jehol functional diversity with modern and subfossil avian assemblages show that taphonomic bias alone cannot explain the ecomorphological impoverishment. However, evolutionary simulations suggest that the constrained ecological diversity of the Early Cretaceous pygostylians is consistent with what is expected from a relatively young radiation. Regardless of the proximate biological explanation, the anomalously low functional diversity of the Jehol birds is evidence both for ecological vacancies in Cretaceous ecosystems, which were subsequently filled by the radiation of crown Aves, and for discordance between taxonomic richness and ecological diversity in the best-known Mesozoic ecosystem. PMID:24870044

  16. New insights into the lifestyle of Allosaurus (Dinosauria: Theropoda based on another specimen with multiple pathologies

    Directory of Open Access Journals (Sweden)

    Christian Foth

    2015-05-01

    also related to the presence of non-endothermic metabolic rates that allow survival based on sporadic food consumption or scavenging behavior. Signs of pathologies consistent with infections are scarce and locally restricted, indicating a successful prevention of the spread of pathogens, as it is the case in extant reptiles (including birds.

  17. Migration of birds

    Data.gov (United States)

    US Fish and Wildlife Service, Department of the Interior — This report covers the migration of birds. Topics covered include why birds migrate, when birds migrate, speed, altitude, courses, distance, major flyways and...

  18. New evidence of feathers in the Crato Formation supporting a reappraisal on the presence of Aves

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    Juliana M. Sayão

    2011-03-01

    Full Text Available The preservation of delicate structures such as feathers is very rare in the paleontological record, due to the fragility of their components. Fossil feathers have been reported from approximately 50 deposits around the world, from the Late Jurassic to the Pleistocene. In Brazil initial findings consisted of a primary feather of a large bird found in the Tremembé Formation. Other occurrences are preserved in the Crato Formation, where several symmetrical and one single asymmetrical feather was found. Based on three new specimens and reassessing further feather occurrences we cannot confirm the presence of volant Aves in this deposit. The presence of an asymmetrical feather without barbules and hooks hints at the previous existence of a flightless animal within this deposit, possibly a flightlessness bird or a non-avian theropod. Conversely, the presence of a feather from morphotype II present in Tyrannosauroidea, Compsognathidae, Therizinosauroidea and Dromeosauridae, points to a non-theropod origin. Since there are no confirmed records of birds and other feathered archosaurs in the region to date, more evidence is required to identify the animal from which these structures originated.A fossilização de estruturas de revestimento delicadas como as penas constitui um processo extremamente raro, principalmente pela fragilidade de seus componentes. São conhecidos apenas cinquenta depósitos com esta natureza de registro (do Jurássico ao Terciário. No Brasil a primeira referência data de 1916, descrevendo uma pena de vôo com características plumáceas da Formação Tremembé (Bacia de Taubaté. Outras evidências, são provenientes dos calcários laminados da Formação Crato, apresentando registros de penas assimétricas e apenas uma simétrica. Com base em novos achados e reavaliando penas previamente descritas, verificou-se que não se pode afirmar a presença de Aves voadoras nestes depósitos. Isto se deve a ausência de estruturas

  19. Infección sinusual por klebsiella pneumoniae relacionada con atresia cohanal en papagayo - Klebsiella pneumoniae sinus infection related with choanal atresia in psittacine bird

    Directory of Open Access Journals (Sweden)

    Dr. Carlos Jesús Soto Piñeiro

    2012-03-01

    Full Text Available ResumenEn las aves afectaciones anatómicas o mecánicas del tracto respiratorio superior pueden facilitar a la permanencia y multiplicación en vías aéreas de microorganismos patógenos que pueden agravar el proceso y servir de fuente de contaminación a otras aves.AbstractAnatomical abnormalities and mechanical obstruction of the upper respiratory tract in birds facilitates the replication and diffusion of pathogen microrganisms that can complicate the disease and becomes a source infection to other birds.

  20. Valoración de las afectaciones hepáticas en aves ornamentales

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    Dr. Carlos J. Soto Piñeiro.

    2010-11-01

    Full Text Available ResumenLas manifestaciones clínicas de enfermedades hepáticas en avesornamentales muchas veces no son apreciadas, trascurriendo de formasilente y cuando se evidencian puede ser tardía la acción veterinaria. Por esa razón se pretende con el siguiente articulo, luego de una revisión anatomo fisiológica de las características de este órgano en las aves, dar una visión didáctica y actual de como proceder en las valoraciones clínicas de casos sospechosos de afectaciones hepáticas, como interpretar para llegar a un diagnostico los diversos resultados de laboratorio y como proceder en la direccionalidad del tratamiento en cada caso.SummaryThe clinical manifestations of hepatic disease in ornamental birds are often not appreciated in preliminary stages and the pathology can be evident when it is too late for the veterinary action. For that reason, the aim of our work is to give a didactic vision of the clinical evaluations of suspected cases of hepatic disease. We introduce the argument with a description of the anatomy and physiology of the liver in the birds; we approach the diagnostic considerations, the interpretation of laboratory results, as wellas the description of the hepatic diseases and the treatment of liverdisorders.

  1. A Thankful Bird

    Institute of Scientific and Technical Information of China (English)

    颜巧玲

    2002-01-01

    One day, I was playing in the woods when I saw a bird standing on a tree branch in the rain. “Poor bird, I thought, ”He has no home. “When I got home, I set down to make a house for the bird so that the bird would not catch rain any longer.

  2. Echinuria uncinata (Rudolphi (Nematoda, Acuariidae in Netta peposaca (Vieillot (Aves, Anatidae in South America Echinuria uncinata (Rudolphi (Nematoda, Acuariidae em Netta peposaca (Vieillot (Aves, Anatidae na América do Sul

    Directory of Open Access Journals (Sweden)

    Eliane F. da Silveira

    2006-06-01

    Full Text Available This is the first report of a species of Echinuria Soloviev, 1912, on anatid hosts in South America, causing granulomas. It is also the first detailed description and record of a species of Echinuria, for South America in the Rosy-billed Pochard, Netta peposaca (Vieillot, 1816. Fifty-two rosy-billed pochards were examined for helminths in the Municipalities of Santa Vitória do Palmar (locality of Fazenda Sossego and (locality of Ponta da Antena, State of Rio Grande do Sul, Brazil, and Alvear, Province of Corrientes, northern Argentina. Samples were obtained from 2003 to 2004. After the catch each bird was immediately frozen with dry ice. Prior to necropsy birds were sexed, weighted, measured, and the state of maturity (juvenile or adult determined, based on the presence or absence of a bursa of Fabricius. The granulomas with the nematodes were found in the proximal esophagus at the junction with the proventriculus. Two birds had one (fistulated and two granulomas, respectively. One of the birds was from the wintering grounds along the coastal region in the State of Rio Grande do Sul, southern Brazil. The other, from one of the breeding grounds in northern Argentina, was captured before the trip to the wintering grounds along the migratory flyway. Prevalence was 3.8% while the mean intensity of infection was 7.2. Morphometry of males and females and the comparison with previous descriptions and illustrations allowed the identification of the present specimens as E. uncinata.Este é o primeiro registro de uma espécie do gênero Echinuria Soloviev, 1912, em hospedeiros anatídeos na América do Sul, causando granulomas. É, também, a primeira descrição detalhada e o primeiro registro de Echinuria uncinata (Rudolphi, 1819 Soloviev, 1912, para a América do Sul, e o primeiro registro de um nematóide acuarióideo em Netta peposaca (Vieillot, 1816. Cinqüenta e dois marrecões foram examinados para helmintos nas localidades de Fazenda Sossego e

  3. Jaw musculature of Cyclarhis gujanensis (Aves: Vireonidae).

    Science.gov (United States)

    Previatto, D M; Posso, S R

    2015-08-01

    Cyclarhis gujanensis is a little bird which feeds on high number of large preys, such frogs, lizards, snakes, bats and birds. As there are few studies on the cranial anatomy of this species, we aimed to describe the cranial myology to contribute to the anatomical knowledge of this species and to make some assumptions about functional anatomy. Thus, we described the muscles from the jaw apparatus (external and internal adductor muscles, the muscles of the pterygoid system and the depressor muscles of the mandible). The adductor system is the greatest and multipinulated, particularly in its origin in the caudal portion of the temporal fossa. The depressor jaw muscles systems are enlarged with many components in complexity. The most of jaw apparatus muscles are short, but the strength (biting or crushing forces) from short feeding apparatus fibers probably is increased by high number of components and pinnulation. These anatomical aspects of the muscles indicate a considerable force in the jaws, without which C. gujanensis probably could not cut their prey into smaller pieces. However, functional approaches to analysis of forces of the muscle fibers are needed to corroborate / refute the hypotheses mentioned above. PMID:26421766

  4. 阿维链霉菌中aveD基因缺失对阿维菌素合成的影响%Effect of Gene Deletion of aveD on Avermectins Production in Streptomyces avermitilis

    Institute of Scientific and Technical Information of China (English)

    陈芝; 文莹; 宋渊; 李季伦

    2002-01-01

    利用aveD基因的缺失载体pCZ8(pKC1139∷△aveD)对阿维菌素(Avermectin)产生菌阿维链霉菌(Streptomyces avermitilis)76-9的aveD基因进行缺失获得aveD缺失突变株.经摇瓶发酵和HPLC检测,发现该突变株只产生阿维菌素B组分.说明将阿维链霉菌的aveD基因缺失,并不影响下游aveF的表达.缺失突变株的阿维菌素的总产量与出发菌株的总产量基本相同,突变株中B1的产量略有提高,阿维菌素B2的含量显著提高.

  5. DETERMINACIÓN DE SEXO EN AVES MEDIANTE HERRAMIENTAS MOLECULARES

    OpenAIRE

    MATTA CAMACHO NUBIA E.

    2009-01-01

    RESUMEN

    La ausencia de dimorfismo sexual en los estadios juveniles y durante la edad adulta de gran cantidad de especies de aves, dificulta o imposibilita la determinación del sexo basados en el fenotipo. El empleo de marcadores moleculares para determinar el sexo de las aves es una herramienta útil d...

  6. Tri razsežnosti pravne države

    OpenAIRE

    Kristan, Andrej

    2014-01-01

    Le redko kdo poudarja, da dostop posameznikov do ustavnega sodišča ni namenjen zgolj varstvu človekovih pravic, ampak pomembno pripomore tudi k resnični ustavnosti pravnega reda. Ob napovedovanih ustavnih spremembah zato v tej razpravi razčlenim povezavo med zasebnim dostopom do ustavnega sodišča in pojmom pravne države. V ta namen izrišem tudi velik del pomenskega ogrodja pravne države. Na koncu različne oblike ustavnonadzornih ureditev razvrstim glede na to, ali pravno državo krepijo ali pa...

  7. Neumonitis por hipersensibilidad asociado al cuidado de aves

    OpenAIRE

    Ana María González-Zúñiga; Juana Alejandra Gutiérrez-Ríos

    2015-01-01

    La neumonitis por hipersensibilidad asociada al cuidado de las aves es uno de los tipos más frecuentes de esta que se presentan. Aunque no se tienen datos epidemiológicos claros sobre su prevalencia, en los hospitales llegan casos de este tipo. No es una patología muy común; sin embargo, una muestra representativa de la población se encuentra expuesta a las aves y, consecuentemente, a los antígenos que causan la enfermedad. Su diagnóstico temprano puede significar para el paciente evitar daño...

  8. Contracaecumovale (Nematoda: Anisakidae from Rollandia rolland Quoy & Gaimard 1824 (Aves, Podicipedidae in Argentina Contracaecumovale (Nematoda: Anisakidae de Rollandia rolland Quoy & Gaimard 1824 (Aves, Podicipedidae na Argentina

    Directory of Open Access Journals (Sweden)

    Noelia Adelina Galeano

    2012-06-01

    Full Text Available Necropsy on 15 specimens of white-tufted grebe, Rollandiarolland, caught in the Mar Chiquita and Chascomús lagoons (Buenos Aires province, revealed the presence of Contracaecumovale (Linstow, 1907. This nematode shows a marked specificity for podicipediform birds. The specimens were identified from morphological study on features such as cephalic and esophageal structures and caudal papillae, using both optical and scanning electron microscopy. This is the first record of C. ovale parasitizing R. rolland in Argentina.Necropsia de 15 espécimes de mergulhão-de-orelha-branca, Rollandiarolland, coletados nas lagoas Mar Chiquita e Chascomús (Província de Buenos Aires, revelou a presença de Contracaecumovale (Linstow, 1907. Esse nematóide tem uma marcada especificidade pelas aves podicipediformes. Os espécimes foram identificados a partir de características, tais como estruturas morfológicas cefálicas e esofágicas e papilas caudais, utilizando-se microscopia óptica e microscopia eletrônica de varredura (MEV. Esse é o primeiro registro de C. ovale parasito de R. rolland na Argentina.

  9. Phylogeny, Historical Biogeography and the Evolution of Migration in Accipitrid Birds of Prey (Aves: Accipitriformes

    Directory of Open Access Journals (Sweden)

    Nagy Jenő

    2014-06-01

    Full Text Available A legtöbb mérsékelt övi madárfaj életciklusában alapvető szerepet tölt be a vonulás. A rendszeres, nagy kiterjedésű mozgások, melyek a mérsékelt övi vonulási rendszereket jellemzik, egyes feltételezések szerint a trópusi fajok poszt-glaciális, északi irányú terjeszkedésével párhuzamosan jelentek meg. Ezen felül a vonulás előfordulását számos ökológiai tényező is befolyásolhatja, mint például a környezet szezonalitásának mértéke vagy a téli túlélést befolyásoló tényezők. A vonulás eredete és evolúciója ezért csak úgy érthető meg, ha a madarak biogeográfiai történetiségét és ökológiáját filogenetikai kontextusban tanulmányozzuk. Jelen vizsgálatban a vágómadár-alakúak (Accipitriformes vonulásának evolúcióját elemeztük komparatív módszerekkel. Első lépésben létrehoztunk egy fosszilis adatok alapján datált molekuláris törzsfát, amelyen jellegrekonstrukciót végeztünk és rekonstruáltuk a fajok ősi elterjedési területét. Az elemzéseink alapján a vonulás többször alakult ki a ragadozók esetében, legkorábban a héjaformákon (Accipitrinae belül, vélhetően a Miocén közepén. A legtöbb esetben a vonuló leszármazási vonalak nem vonuló őseinél trópusi elterjedésre következtethetünk. A direkcionális evolúciós teszt alapján a vonulás a trópusokon jelent meg és megnövelte a mérsékelt égöv kolonizációjának rátáját. Eszerint tehát a mérsékelt övi ragadozómadár fajok vonuló trópusi fajok leszármazottainak tekinthetők, melyek az erősen szezonális, északi élőhelyek irányába terjeszkedtek. Végezetül negatív kapcsolatot találtunk a vonulás megjelenése és a táplálékspecializáció mértéke között.

  10. Pseudasthenes, a new genus of ovenbird (Aves: Passeriformes: Furnariidae)

    Science.gov (United States)

    Derryberry, Elizabeth; Claramunt, Santiago; O'Quin, Kelly E.; Aleixo, Alexandre; Chesser, R. Terry; Remsen, J.V., Jr.; Brumfield, Robb T.

    2010-01-01

    Phylogenetic analysis of the family Furnariidae (Aves: Passeriformes) indicates that the genus Asthenes is polyphyletic, consisting of two groups that are not sister taxa. Pseudasthenes, a new genus of ovenbird, is described for one of these groups. The four species included in the new genus, formerly placed in Asthenes, are P. humicola, P. patagonica, P. steinbachi, and P. cactorum.

  11. Nuevo examen de los grabados paleolíticos de El Pendo (Cantabria, España. Consideraciones sobre las aves del arte paleolítico de la Península Ibérica

    Directory of Open Access Journals (Sweden)

    García Díez, Marcos

    2011-06-01

    Full Text Available Birds are very scarce in Palaeolithic rock art. Since 1907 figures of razorbill and raptors (probably vulture have been described at the end of the Pendo cave, both attributed to an Upper Palaeolithic origin (from Aurignacian to Lower Magdalenian, depending on the authors. The new revision of the group of engravings shows the presence of an unambiguous bird, but the morphology of the figure did not permit its precise taxonomic identification. The work also presents a revision of the birds known in Iberian Palaeolithic rock art.

    La presencia de aves en el repertorio iconográfico del arte rupestre paleolítico es muy escasa. Desde 1907 se vienen describiendo unas figuras de alca y de rapaz (probablemente buitre en la parte final de la cueva de El Pendo. Los autores las asignan a un momento antiguo, desde el Auriñaciense hasta el Magdaleniense inferior. Una nueva lectura del conjunto de grabados permite apuntar la presencia inequívoca de una imagen de ave, sin características que permitan su identificación taxonómica precisa. El trabajo revisa, además, las imágenes de aves conocidas en el arte rupestre paleolítico de la Península Ibérica.

  12. AVES: A Computer Cluster System approach for INTEGRAL Scientific Analysis

    Science.gov (United States)

    Federici, M.; Martino, B. L.; Natalucci, L.; Umbertini, P.

    The AVES computing system, based on an "Cluster" architecture is a fully integrated, low cost computing facility dedicated to the archiving and analysis of the INTEGRAL data. AVES is a modular system that uses the software resource manager (SLURM) and allows almost unlimited expandibility (65,536 nodes and hundreds of thousands of processors); actually is composed by 30 Personal Computers with Quad-Cores CPU able to reach the computing power of 300 Giga Flops (300x10{9} Floating point Operations Per Second), with 120 GB of RAM and 7.5 Tera Bytes (TB) of storage memory in UFS configuration plus 6 TB for users area. AVES was designed and built to solve growing problems raised from the analysis of the large data amount accumulated by the INTEGRAL mission (actually about 9 TB) and due to increase every year. The used analysis software is the OSA package, distributed by the ISDC in Geneva. This is a very complex package consisting of dozens of programs that can not be converted to parallel computing. To overcome this limitation we developed a series of programs to distribute the workload analysis on the various nodes making AVES automatically divide the analysis in N jobs sent to N cores. This solution thus produces a result similar to that obtained by the parallel computing configuration. In support of this we have developed tools that allow a flexible use of the scientific software and quality control of on-line data storing. The AVES software package is constituted by about 50 specific programs. Thus the whole computing time, compared to that provided by a Personal Computer with single processor, has been enhanced up to a factor 70.

  13. CRANIAL OSTEOLOGY OF CYCLARHIS GUJANENSIS (AVES: VIREONIDAE

    Directory of Open Access Journals (Sweden)

    DIEGO MATIUSSI PREVIATTO

    2015-01-01

    Full Text Available The small passerine Cyclaris gujanensis can tear into small pieces large or heavy-bodied preys that could not be swallowed whole such as frogs, snakes, bats and birds. However there are few studies on the cranial anatomy of this species. Thus, we focused on the description of the cranial osteology to contribute to the anatomical knowledge of this species and to make some assumptions about functional anatomy. The fossa temporalis is shallow but broad and the fossa of os palatinum is deepened. The os quadratum processes are long and thick. The os pterygoideum is enlarged and the upper jaw is strongly inclined ventrally (140° with reference to the skull. The rostral extremity of rhamphotheca is hooked with ventral concavity to fit the mandible (pincer form. The mandible fossae are deepened and broad and its bulky medial process probably provides mandible stability and strong support to the muscles attached on it. All these peculiar characteristics probably indicate a considerable force in the C. gujanensis jaws and partially explain its distinctive feeding habit compared with the other Vireonidae. Nevertheless, new studies with functional approaches to analysis the forces of the muscle fibers and the cranial kinesis are needed to prove the hypotheses mentioned above.

  14. Cranial Osteology of Meiglyptini (Aves: Piciformes: Picidae

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    Reginaldo José Donatelli

    2012-01-01

    Full Text Available The Meiglyptini comprise eight species grouped into three genera: Meiglyptes and Mulleripicus, with three species each, and Hemicircus, with two species. The aim of the present study was to describe the cranial osteology of six species and three genera of Meiglyptini and to compare them to each other, as well as with other species of woodpeckers and other bird groups. The cranial osteology varied among the investigated species, but the most markedly distinct characteristics were: (1 a frontal overhang is only observed in the middle portion of the frontale of H. concretus; (2 the Proc. zygomaticus and suprameaticus are thick and long in species of the genus Mulleripicus, but short in other species; (3 the Pes pterygoidei is relatively larger in species of the genus Mulleripicus, while it is narrow, thin and relatively smaller in species of the genus Meiglyptes and indistinct in H. concretus; (4 the bony projection of the ectethmoidale is relatively short and thin in species of Mulleripicus and more developed in H. concretus. It appears that the greatest structural complexity of the cranial osteology is associated with the birds’ diet, with the frugivorous H. concretus being markedly different from the insectivorous species.

  15. BIRD FLU (AVIAN INFLUENZA

    Directory of Open Access Journals (Sweden)

    Ali ACAR

    2005-12-01

    Full Text Available Avian influenza (bird flu is a contagious disease of animals caused by influenza A viruses. These flu viruses occur naturally among birds. Actually, humans are not infected by bird flu viruses.. However, during an outbreak of bird flu among poultry, there is a possible risk to people who have contact infect birds or surface that have been contaminated with excreations from infected birds. Symptoms of bird flu in humans have ranged from typical flu-like symptoms to eye infections, pneumonia, severe respiratory diseases and other severe and life-threatening complications. In such situation, people should avoid contact with infected birds or contaminated surface, and should be careful when handling and cooking poultry. [TAF Prev Med Bull 2005; 4(6.000: 345-353

  16. Principios en la alimentación de psitacidas (Principles of psittacine birds nutrition

    Directory of Open Access Journals (Sweden)

    Dr. Carlos Jesús Soto Piñeiro

    2011-11-01

    Full Text Available ResumenEn ocasiones a consulta veterinaria llegan casos de psitácidas con patologías en las que el componente alimentario ha tenido una base fundamental en su origen, en otros orientar una adecuada alimentaciónpuede contribuir a la recuperación del paciente o simplemente los propietarios de estas aves nos piden consejos sobre la alimentación de alguna especie de loro determinada.Abstract:Many times at the veterinary practice we receive cases of psittacine birds with pathologies resulting from nutritional disorders. In other cases the pet bird owners attend to have advice on adequate diet.

  17. Birds: Old Questions and New.

    Science.gov (United States)

    Flannery, Maura C.

    2002-01-01

    Discusses questions such as how birds fly and the meaning of bird songs. Explains the relationship between birds and ecological activism and points out the excitement in research and observation of birds. (Contains 34 references.) (YDS)

  18. A Clever Bird

    Institute of Scientific and Technical Information of China (English)

    张仰清

    2000-01-01

    A man in Australia had a wonderful bird. There was no other bird like it . It was very,very clever. The bird could say any word --except one. It could not say the name of the town where it was born. The name of that town was Catano.

  19. Evolution of Teeth and Quadrate in Non-avian Theropoda (Dinosauria: Saurischia), with the Description of Torvosaurus Remains from Portugal

    OpenAIRE

    Hendrickx, Christophe

    2015-01-01

    Theropods form a highly successful and morphologically diversified group of dinosaurs that gave rise to birds. They include most, if not all, carnivorous dinosaurs, yet many theropod clades were secondarily adapted to piscivory, omnivory and herbivory, and theropods show a large array of skull and dentition morphologies. This work aims to investigate aspects of the evolution of theropod dinosaurs by analyzing in detail both the anatomy and ontogeny of teeth and quadrates in non-avian theropod...

  20. Vertebral Pneumaticity in the Ornithomimosaur Archaeornithomimus (Dinosauria: Theropoda Revealed by Computed Tomography Imaging and Reappraisal of Axial Pneumaticity in Ornithomimosauria.

    Directory of Open Access Journals (Sweden)

    Akinobu Watanabe

    Full Text Available Among extant vertebrates, pneumatization of postcranial bones is unique to birds, with few known exceptions in other groups. Through reduction in bone mass, this feature is thought to benefit flight capacity in modern birds, but its prevalence in non-avian dinosaurs of variable sizes has generated competing hypotheses on the initial adaptive significance of postcranial pneumaticity. To better understand the evolutionary history of postcranial pneumaticity, studies have surveyed its distribution among non-avian dinosaurs. Nevertheless, the degree of pneumaticity in the basal coelurosaurian group Ornithomimosauria remains poorly known, despite their potential to greatly enhance our understanding of the early evolution of pneumatic bones along the lineage leading to birds. Historically, the identification of postcranial pneumaticity in non-avian dinosaurs has been based on examination of external morphology, and few studies thus far have focused on the internal architecture of pneumatic structures inside the bones. Here, we describe the vertebral pneumaticity of the ornithomimosaur Archaeornithomimus with the aid of X-ray computed tomography (CT imaging. Complementary examination of external and internal osteology reveals (1 highly pneumatized cervical vertebrae with an elaborate configuration of interconnected chambers within the neural arch and the centrum; (2 anterior dorsal vertebrae with pneumatic chambers inside the neural arch; (3 apneumatic sacral vertebrae; and (4 a subset of proximal caudal vertebrae with limited pneumatic invasion into the neural arch. Comparisons with other theropod dinosaurs suggest that ornithomimosaurs primitively exhibited a plesiomorphic theropod condition for axial pneumaticity that was extended among later taxa, such as Archaeornithomimus and large bodied Deinocheirus. This finding corroborates the notion that evolutionary increases in vertebral pneumaticity occurred in parallel among independent lineages of bird

  1. Archaeopteryx: Dinosaur or Bird?

    Institute of Scientific and Technical Information of China (English)

    SONG Jianlan

    2011-01-01

    @@ An Archaeopteryx-like theropod dinosaur newly found from western Liaoning Province in northeastern China would make an unusual, if not unwelcome, gift for the 150th birthday of Archaeopteryx, the oldest bird as long-believed by paleontologists: Named as Xiaotingia zhengiis, the new species carries some critical traits suggesting that Archaeopteryx might have actually been a dinosaur.Naturally this breaking news stirred intense controversies.Was "The Oldest Bird" a bird? If not, what makes a bird? With these questions in mind, the author joined an exploration in search of "the real first bird" along with the paleontologists at the Institute of Vertebrate Paleontology and Paleoanthropology (IVPP) under CAS.

  2. Patterns of research effort in birds.

    Directory of Open Access Journals (Sweden)

    Simon Ducatez

    Full Text Available Between species differences in research effort can lead to biases in our global view of evolution, ecology and conservation. The increase in meta-taxonomic comparative analyses on birds underlines the need to better address how research effort is distributed in this class. Methods have been developed to choose which species should be studied to obtain unbiased comparative data sets, but a precise and global knowledge of research effort is required to be able to properly apply them. We address this issue by providing a data set of research effort (number of papers from 1978 to 2008 in the Zoological Record database estimates for the 10,064 species of birds. We then test whether research effort is associated with phylogeny, geography and eleven different life history and ecological traits. We show that phylogeny accounts for a large proportion of the variance, while geographic range and all the tested traits are also significant contributors to research effort variance. We identify avian taxa that are under- and overstudied and address the importance of research effort biases in evaluating vulnerability to extinction, with non-threatened species studied twice as much as threatened ones. Our research effort data set covering the entire class Aves provides a tool for researchers to incorporate this potential confounding variable in comparative analyses.

  3. Molecular phylogeny of the spoonbills (Aves: Threskiornithidae) based on mitochondrial DNA

    Science.gov (United States)

    Chesser, R. Terry; Yeung, Carol K.L.; Yao, Cheng-Te; Tian, Xiu-Hua; Li, Shou-Hsien

    2010-01-01

    Spoonbills (genus Platalea) are a small group of wading birds, generally considered to constitute the subfamily Plataleinae (Aves: Threskiornithidae). We reconstructed phylogenetic relationships among the six species of spoonbills using variation in sequences of the mitochondrial genes ND2 and cytochrome b (total 1796 bp). Topologies of phylogenetic trees reconstructed using maximum likelihood, maximum parsimony, and Bayesian analyses were virtually identical and supported monophyly of the spoonbills. Most relationships within Platalea received strong support: P. minor and P. regia were closely related sister species, P. leucorodia was sister to the minor-regia clade, and P. alba was sister to the minor-regia-leucorodia clade. Relationships of P. flavipes and P. ajaja were less well resolved: these species either formed a clade that was sister to the four-species clade, or were successive sisters to this clade. This phylogeny is consistent with ideas of relatedness derived from spoonbill morphology. Our limited sampling of the Threskiornithinae (ibises), the putative sister group to the spoonbills, indicated that this group is paraphyletic, in agreement with previous molecular data; this suggests that separation of the Threskiornithidae into subfamilies Plataleinae and Threskiornithinae may not be warranted.

  4. Coprolite deposits reveal the diet and ecology of the extinct New Zealand megaherbivore moa (Aves, Dinornithiformes)

    Science.gov (United States)

    Wood, Jamie R.; Rawlence, Nicolas J.; Rogers, Geoffery M.; Austin, Jeremy J.; Worthy, Trevor H.; Cooper, Alan

    2008-12-01

    The discovery in New Zealand of Late Holocene deposits of coprolites from extinct avian megaherbivores has provided a unique opportunity to gain a detailed insight into the ecology of these birds across ecologically diverse habitats. Macrofossil analysis of 116 coprolites of the giant ratite moa (Aves, Dinornithiformes) reveals a diverse diet of herbs and low shrubs in both semi-arid and high rainfall ecological zones, overturning previous models of moa as dominantly browsers of trees and shrubs. Ancient DNA analysis identified coprolites from four moa species (South Island giant moa, Dinornis robustus; upland moa, Megalapteryx didinus; heavy-footed moa, Pachyornis elephantopus and stout-legged moa, Euryapteryx gravis), revealing a larger dietary variation between habitat types than between species. The new data confirm that moa fed on a variety of endemic plant taxa with unusual growth forms previously suggested to have co-evolved with moa. Lastly, the feeding ecologies of moa are shown to be widely different to introduced mammalian herbivores.

  5. North Slope, Alaska ESI: BIRDS (Bird Polygons)

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — This data set contains sensitive biological resource data for diving birds, gulls and terns, seabirds, shorebirds, and waterfowl for the North Slope of Alaska....

  6. American Samoa ESI: BIRDS (Bird Polygons)

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — This data set contains sensitive biological resource data for seabirds, wading birds, shorebirds, waterfowl, and gulls and terns in American Samoa. Vector polygons...

  7. Pacchionische Granulationen (Granulationes arachnoidales) bei Vögeln (Aves)

    OpenAIRE

    Rabe, Hannes

    2010-01-01

    In this study the meninges of 66 species of birds were microscopically examined to determine occurrence and morphology of PACCHIONIAN granulations in birds. Furthermore, the morphology of the meningeal sheaths of the olfactory bulb and sheaths of the olfactory nerves up to their entrance into the olfactory epithelium were examined by electron microscope in two species of mammals (rat and cat) and birds (chicken and pigeon), respectively, to determine their suitability as possible pathways for...

  8. Reweaving the tapestry: a supertree of birds.

    Science.gov (United States)

    Davis, Katie E; Page, Roderic D M

    2014-01-01

    Our knowledge of the avian tree of life remains uncertain, particularly at deeper levels due to the rapid diversification early in their evolutionary history. They are the most abundant land vertebrate on the planet and have been of great historical interest to systematists. Birds are also economically and ecologically important and as a result are intensively studied, yet despite their importance and interest to humans around 13% of taxa currently on the endangered species list perhaps as a result of human activity. Despite all this no comprehensive phylogeny that includes both extinct and extant species currently exists. Here we present a species-level supertree, constructed using the Matrix Representation with Parsimony method, of Aves containing approximately two thirds of all species from nearly 1000 source phylogenies with a broad taxonomic coverage. The source data for the tree were collected and processed according to a strict protocol to ensure robust and accurate data handling. The resulting tree topology is largely consistent with molecular hypotheses of avian phylogeny. We identify areas that are in broad agreement with current views on avian systematics and also those that require further work. We also highlight the need for leaf-based support measures to enable the identification of rogue taxa in supertrees. This is a first attempt at a supertree of both extinct and extant birds, it is not intended to be utilised in an overhaul of avian systematics or as a basis for taxonomic re-classification but provides a strong basis on which to base further studies on macroevolution, conservation, biodiversity, comparative biology and character evolution, in particular the inclusion of fossils will allow the study of bird evolution and diversification throughout deep time. PMID:24944845

  9. Diversidad y distribución de las especies de Mallophaga (Insecta en Aves y Mamíferos de la Comunidad de Madrid

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    Martín Mateo, M. P.

    2006-05-01

    Full Text Available Based on the entomological collection of the Museo Nacional de Ciencias Naturales, MNCN (Madrid, Spain and the literature, a total of 145 species of birds and 12 species of mammals that could be potential hosts of Mallophaga, are cited for Madrid. These species are potential hosts to 306 species of Mallophaga. Only 29 species of birds (20% and 2 species of mammals (14,3% have been searched for the presence of Mallophaga. These species could be potential hosts of 91 different Mallophaga species, but only 40 species (44% are recorded. Each species present in Madrid is indicated with its the host, the material known and respective references.

    Se presenta información general sobre la biodiversidad y distribución de los Mallophaga parásitos de aves y mamíferos en la Comunidad de Madrid. Con base en datos obtenidos en colecciones del MNCN (Madrid y revisión de la bibliografía de referencia, se obtienen un total de 145 especies de aves y 12 de mamíferos hospedadores potenciales de 306 especies de malófagos en la Comunidad de Madrid. De ésas, solo 29 especies de aves (20 % y 2 de mamíferos (14,3 % han sido exploradas, las cuales podrían estar parasitadas por, al menos, 91 especies diferentes de malófagos, pero solo se conocen citas de 40 especies (44 %. En cada especie indicada se señalan los hospedadores conocidos, material y referencia correspondiente para cada especie de Mallophaga citada en la Comunidad de Madrid.

  10. Monitoring bird population trends in North America

    Science.gov (United States)

    Robbins, C.S.; Bystrak, D.; Geissler, P.H.; Purroy, F.J.

    1983-01-01

    Se ofrece un nuevo metodo para computar las oscilaciones demograficas de las aves a lo largo de los anos. Con los datos suministrados por el proyecto 'Aves nidificantes en Norteamerica' , se indican en la Tabla 1 las pautas de cambio numerico de una serie seleccionada de aves holarticas.

  11. Vascular and Neural Dysfunctions in Obese Zucker Rats: Effect of AVE7688

    OpenAIRE

    Davidson, Eric P; Coppey, Lawrence J.; Kleinschmidt, Travis L.; Oltman, Christine L.; Yorek, Mark A.

    2009-01-01

    The purpose of this study was to determine whether AVE7688 a drug that inhibits both angiotensin converting enzyme and neutral endopeptidase activity protects vascular and nerve functions in an animal model of metabolic syndrome. Obese Zucker rats at 20 weeks of age were treated for 12 weeks with AVE7688. Vasodilation in epineurial arterioles was measured by videomicroscopy and nerve conduction velocity was measured following electrical stimulation. Treatment with AVE7688 improved vascular re...

  12. Diseases Transmitted by Birds.

    Science.gov (United States)

    Levison, Matthew E

    2015-08-01

    Although many people these days actually work very hard at leisure time activities, diseases are most commonly acquired from birds during the course of work in the usual sense of the term, not leisure. However, travel for pleasure to areas where the diseases are highly endemic puts people at risk of acquiring some of these bird-related diseases (for example, histoplasmosis and arbovirus infections), as does ownership of birds as pets (psittacosis). PMID:26350315

  13. Crescimento e desempenho de linhagens de aves pescoço pelado criadas em sistema semi-confinado Growth and performance of naked neck broiler reared in free-range system

    Directory of Open Access Journals (Sweden)

    Leilane Rocha Barros Dourado

    2009-06-01

    Full Text Available Este trabalho foi realizado para avaliar o crescimento e desempenho de duas linhagens de aves pescoço pelado. Foram utilizadas 400 aves, distribuídas em um delineamento inteiramente casualizado, os tratamentos consistiram de um esquema fatorial 2 x 2 (linhagens x sexo, com cinco repetições de 20 aves cada. Foram utilizadas aves Pescoço Pelado das linhagens Sasso e ISA Label. As aves receberam rações formuladas à base de milho e de farelo de soja para atender às exigências nutricionais. Foi determinado o ganho de peso (GP, o consumo de ração (CR e a conversão alimentar (CA aos 28, 56 e 84 dias de idade e o rendimento de carcaça e de partes aos 84 dias de idade. Não foi observada interação entre sexo e linhagem (P>0,05 para nenhuma das variáveis de desempenho analisadas. Para CR e GP houve diferenças significativas (PA trial was carried out to evaluate the growth and performance of naked neck birds. Four hundred birds were distributed into four treatments in factorial arrangement (2 strains x 2 genders, with five replicates of 20 birds each. The naked neck strains evaluated were Sasso and ISA Label. The birds were fed a diet formulated with corn and soybean meal according to the nutritional requirements. Food intake, body weight gain and food conversion were determined at 28, 56, and 84 days as well as the yield of carcass and cuts at 84 days. No interaction was observed between gender and strain (P>0.05. Food intake and body weight gain were different (P <0.05 between the strains and between the genders. Sasso strain presented higher performance than ISA Label. The parameters estimated for Gompertz equation, the weigh at maturity (Wm and time that the growth rate is maximum (t* were higher and maturity rate (b was lower for Sasso strain than those of Isa Label strain. These results indicated that the Isa Label was more precocious than Sasso strain. The females showed better breast yield while the males showed better thigh and

  14. Primer registro del Calancate Común Aratinga a. acuticaudata (Aves: Psittacidae como huésped nativo primario de Ornithocoris toledoi Pinto (Hemiptera: Heteroptera: Cimicidae First record of Blue-Crowned Parrot Aratinga a. acuticaudata (Aves: Psittacidae as primary native host of Ornithocoris toledoi Pinto (Cimicidae: Hemiptera: Heteroptera

    Directory of Open Access Journals (Sweden)

    Diego L Carpintero

    2011-12-01

    Full Text Available Se presenta como huésped primario nativo de la chinche Ornithocoris toledoi Pinto (Hemiptera: Heteroptera: Cimicidae al Calancate Común Aratinga a. acuticaudata (Aves: Psittacidae. Su presencia en la provincia del Chaco constituye además un nuevo registro distribucional de esta chinche en la República Argentina. Se agrega una breve discusión acerca de la taxonomía de la misma y se comparan algunos parámetros poblacionales con los de otras especies de cimícidos. Finalmente, se discuten las vías de infestación posibles en el estado actual de conocimiento, incluyendo otras aves (Furnariidae y murciélagos (Chiroptera.The primary natural host of cimicid bug Ornithocoris toledoi Pinto (Hemiptera: Heteroptera: Cimicidae is presented as Blue-Crowned Parrot Aratinga a. acuticaudata (Aves: Psittacidae. Its presence in the Chaco province is also a new distributional record of this bug in Argentina. A brief discussion about the taxonomy is also given and some population parameters are compared with those of other bug species. Finally, we discuss possible infestation ways in the current state of knowledge, including other birds (Furnariidae and bats (Chiroptera.

  15. Coastal Resources Atlas: Long Island: BIRDS (Bird Polygons)

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — This data set contains sensitive biological resource data for wading birds, shorebirds, waterfowl, raptors, diving birds, seabirds, passerine birds, and gulls and...

  16. What Is Bird Flu?

    Institute of Scientific and Technical Information of China (English)

    邢连香

    2004-01-01

    What is bird flu? It's a form of influenza believed to strike all birds. Though poultry (家禽)are believed to be especially prone to (倾向于)humans, no human-to-human transmission(传播) has been reported.

  17. Compost de ave de corral como componente de sustratos

    Directory of Open Access Journals (Sweden)

    Lorena Alejandra Barbaro¹

    2011-07-01

    Full Text Available El sustrato para cultivo es un material que colocado en un contenedor permite el anclaje del sistema radicular, proporcionando agua y nutrientes. Entre los materiales empleados para formular sustratos se encuentran los compost. Entre ellos el compost de cama de ave de corral (CAC, elaborado en base al estiércol de aves mezclado con los materiales que forman su lecho. El objetivo de este trabajo fue evaluar dos compost de CAC como componente de sustrato, mediante el desarrollo de plantas de Coral (Salvia splendens. Uno de los compost contenía cama de stud (CAC+S durante su compostaje. Se formularon sustratos con diferentes proporciones de compost de CAC, compost de corteza de pino y pinocha, luego fueron analizados física y químicamente. A las plantas cultivadas en cada sustrato se midió la longitud y el diámetro del tallo, peso fresco y seco de la parte aérea y radicular. La densidad, porosidad y capacidad de retención de agua de todos los sustratos fueron aceptables. El pH de ambos compost de CAC fue mayor a 6,3, y los valores de las mezclas se encontraron dentro del rango aceptable. Todos los sustratos superaron 1 dS m-1 (1+5 v/v, principalmente los formulados con compost de CAC+S, cuyo material puro contenía altos niveles salinos. Al disminuir el porcentaje de CAC en las mezclas, diminuyó la concentración de cada nutriente. Las plantas cultivadas en el sustrato comercial y en las mezclas con 20% de CAC fueron las que lograron los mayores pesos aéreos y radiculares, diámetro y longitud del tallo. Por lo tanto, el compost de ave de corral podría ser una alternativa viable como componente de sustrato si se lo utiliza hasta un 20%.

  18. Aves ocasionales en la sabana de bogotá

    OpenAIRE

    Borrero, José Ignacio

    2012-01-01

    La altiplanicie andina conocida con el nombre de Sabana de Bogotá, situada en la llamada "tierra fría" de los Andes Orientales de Colombia, a 2600 metros sobre el nivel del mar y con temperatura media de 13o C., esta bordeada en todo su derredor por montañas cuya altura en ningún sitio se eleva a menos de 2700 metros y esto solamente en el lado occidental, hacia el valle del Magdalena. Sin embargo, es visitada con alguna frecuencia por aves propias de pisos climáticos más cálidos y aun del ll...

  19. Body mass and acquisition of breeding plumage of wintering Calidris pusilla (Linnaeus (Aves, Scolopacidae in the coast of Pernambuco, north-eastern Brazil

    Directory of Open Access Journals (Sweden)

    Carmem E. Fedrizzi

    2004-06-01

    Full Text Available Annually, large flocks of semipalmated sandpiper Calidris pusilla (Linnaeus, 1766 winter along South America coast, between September-April. They store fats in order to moult and return to their breeding grounds. Here, was examined body masses and plumage of adults Semipalmated Sandpipers during the departure month to evaluate the relationship between body mass and plumage. Fieldwork was conducted at Coroa do Avião (7º40'S, 34º50'W, Pernambuco. Birds were trapped in mist-nets between April 1990 and 1997. They were weighed, and aged according to plumage. Adult plumage may be (1 non-breeding, (2 pre-breeding, and (3 breeding. A total of 213 birds were weighed and examined, so that 8.0% (17 presented non-breeding plumage, 54.0% (115 pre-breeding, and 38.0% (81 breeding plumage. As in Semipalmated Sandpiper, 25g is the minimum body mass required to migrate, birds with breeding plumage and most with pre-breeding, were potentially apt to migrate. Non-breeding plumage birds presented smaller body mass. Apparently physiological problems and infestation may be important factors to explain over-summering, i.e., individuals remaining in the wintering grounds during the boreal summer.Anualmente grandes bandos de Calidris pusilla (Linnaeus, 1766 invernam ao longo da costa da América do Sul, entre setembro e abril. Estas aves acumulam gordura para realizar mudas e retornar aos seus locais de reprodução. Neste estudo foram examinadas a massa corpórea e a plumagem de C. pusilla adultos durante o mês de retorno aos sítios reprodutivos, de forma a avaliar sua relação. A amostragem foi conduzida na Coroa do Avião (7º40'S, 34º50'W, Pernambuco. As aves foram capturadas com redes de neblina entre abril de 1990 e 1997. Os adultos e os jovens foram diferenciados através da análise de plumagem. A plumagem dos adultos foi classificada em: (1 não-reprodutiva, (2 pré-reprodutiva e (3 reprodutiva. Um total de 213 aves foi examinado e sua massa corp

  20. Variation, variability, and the origin of the avian endocranium: insights from the anatomy of Alioramus altai (Theropoda: Tyrannosauroidea.

    Directory of Open Access Journals (Sweden)

    Gabe S Bever

    Full Text Available The internal braincase anatomy of the holotype of Alioramus altai, a relatively small-bodied tyrannosauroid from the Late Cretaceous of Mongolia, was studied using high-resolution computed tomography. A number of derived characters strengthen the diagnosis of this taxon as both a tyrannosauroid and a unique, new species (e.g., endocranial position of the gasserian ganglion, internal ramification of the facial nerve. Also present are features intermediate between the basal theropod and avialan conditions that optimize as the ancestral condition for Coelurosauria--a diverse group of derived theropods that includes modern birds. The expression of several primitive theropod features as derived character states within Tyrannosauroidea establishes previously unrecognized evolutionary complexity and morphological plasticity at the base of Coelurosauria. It also demonstrates the critical role heterochrony may have played in driving patterns of endocranial variability within the group and potentially reveals stages in the evolution of neuroanatomical development that could not be inferred based solely on developmental observations of the major archosaurian crown clades. We discuss the integration of paleontology with variability studies, especially as applied to the nature of morphological transformations along the phylogenetically long branches that tend to separate the crown clades of major vertebrate groups.

  1. A new clade of archaic large-bodied predatory dinosaurs (Theropoda: Allosauroidea) that survived to the latest Mesozoic

    Science.gov (United States)

    Benson, Roger B. J.; Carrano, Matthew T.; Brusatte, Stephen L.

    2010-01-01

    Non-avian theropod dinosaurs attained large body sizes, monopolising terrestrial apex predator niches in the Jurassic-Cretaceous. From the Middle Jurassic onwards, Allosauroidea and Megalosauroidea comprised almost all large-bodied predators for 85 million years. Despite their enormous success, however, they are usually considered absent from terminal Cretaceous ecosystems, replaced by tyrannosaurids and abelisaurids. We demonstrate that the problematic allosauroids Aerosteon, Australovenator, Fukuiraptor and Neovenator form a previously unrecognised but ecologically diverse and globally distributed clade (Neovenatoridae, new clade) with the hitherto enigmatic theropods Chilantaisaurus, Megaraptor and the Maastrichtian Orkoraptor. This refutes the notion that allosauroid extinction pre-dated the end of the Mesozoic. Neovenatoridae includes a derived group (Megaraptora, new clade) that developed long, raptorial forelimbs, cursorial hind limbs, appendicular pneumaticity and small size, features acquired convergently in bird-line theropods. Neovenatorids thus occupied a 14-fold adult size range from 175 kg ( Fukuiraptor) to approximately 2,500 kg ( Chilantaisaurus). Recognition of this major allosauroid radiation has implications for Gondwanan paleobiogeography: The distribution of early Cretaceous allosauroids does not strongly support the vicariant hypothesis of southern dinosaur evolution or any particular continental breakup sequence or dispersal scenario. Instead, clades were nearly cosmopolitan in their early history, and later distributions are explained by sampling failure or local extinction.

  2. Christmas Island birds returning

    Science.gov (United States)

    Six months after their mass exodus, birds are beginning to return to Christmas Island. Roughly 17 million birds, almost the entire adult bird population, either perished or fled their mid-Pacific atoll home last autumn, leaving behind thousands of nestlings to starve (Eos, April 5, 1983, p. 131). It is believed that the strong El Niño altered the ecology of the surrounding waters and forced the birds to flee. Christmas Island is the world's largest coral atoll.“Ocean and atmosphere scientists are unsure of future directions for the El Niño conditions and cannot now predict what will happen to the birds in the coming months,” said Ralph W. Schreiber, curator of ornithology at the Natural History Museum of Los Angeles County in California. Heisthe ornithologist who discovered the disappearance. “The recovery of the bird populations depends on the food supply in the waters surrounding the island.” The island's birds feed exclusively on small fish and squid.

  3. Notas sobre aves de la amazonia y orinoquia colombianas

    OpenAIRE

    Borrero H., José Ignacio

    2012-01-01

    In this paper a report is given concerning the distribution of some birds in the Colombian Amazonian and Orinoco drainages; also, some previous identifications are amended having at the present time more and better material recently collected and better facilities for studying. In addition, five new species. are recorded for the first time in the fauna of these regions and four new species and subespecies are added to the previous known list of Colombian birds.

  4. Grupos avicaptores del Tardiglaciar : las aves de Berroberria

    Directory of Open Access Journals (Sweden)

    C. Diez Fernandez-Lomana

    1995-01-01

    Full Text Available En este artículo presentamos un estudio sobre marcas de cortes en aves de Berroberria. Los restos proceden de un nivel Magdaleniense superior final datable mediante C14 y con la ayuda de estudios palinológicos y arqueológicos. Los restos avianos pertenecen a la especie Lagopus mutus (perdiz nival y evidencian la caza de esta especie por grupos humanos. El estudio realizado plantea la existencia de poblaciones que recurrían a la caza de aves en épocas del año concretas, las cuales desarrollaron una estrategia de descuartizamiento primario en el lugar de caza y de descarnación en la cavidad. La ausencia de restos avianos quemados, y la minuciosidad en el desmembramiento y deshuesado, implican una búsqueda de carne aviar para un consumo no inmediato. Se postula un acopio de carne, con técnicas de secado y ahumado, para ulteriores necesidades alimenticias, ligadas al encarecimiento de los recursos durante el invierno. Las especies avianas presentes aportan algunas notas sobre las consiciones climáticas que imperaban en la zona.

  5. Comparative sequence-structure analysis of Aves insulin.

    Science.gov (United States)

    Islam, Md Mirazul; Aktaruzzaman, M; Mohamed, Zahurin

    2015-01-01

    Normal blood glucose level depends on the availability of insulin and its ability to bind insulin receptor (IR) that regulates the downstream signaling pathway. Insulin sequence and blood glucose level usually vary among animals due to species specificity. The study of genetic variation of insulin, blood glucose level and diabetics symptoms development in Aves is interesting because of its optimal high blood glucose level than mammals. Therefore, it is of interest to study its evolutionary relationship with other mammals using sequence data. Hence, we compiled 32 Aves insulin from GenBank to compare its sequence-structure features with phylogeny for evolutionary inference. The analysis shows long conserved motifs (about 14 residues) for functional inference. These sequences show high leucine content (20%) with high instability index (>40). Amino acid position 11, 14, 16 and 20 are variable that may have contribution to binding to IR. We identified functionally critical variable residues in the dataset for possible genetic implication. Structural models of these sequences were developed for surface analysis towards functional representation. These data find application in the understanding of insulin function across species.

  6. Oxyspiruriasis in zoo birds.

    Science.gov (United States)

    Vellayan, S; Jeffery, J; Oothuman, P; Zahedi, M; Krishnasamy, M; Paramaswaran, S; Rohela, M; Abdul-Aziz, N M

    2012-06-01

    Oxyspiruriasis caused by the bird eyeworm, Oxyspirura mansoni, a thelaziid nematode, in three species of pheasants, 3 Chrysolophus pictus (golden pheasant), 7 Lophura nycthemera (silver pheasant) and 9 Phasianus colchicus (common pheasant) in Zoo Negara Malaysia are reported. Birds with the disease were treated with a solution of 0.5% iodine or 0.5% lysol. Antistress powder for 4 days in water and non-strep vitamin powder in water was also provided. Control measures included removal of the cockroach intermediate host, Pycnoscelus surinamensis (Surinam cockroach) from the vicinity of the birds. The golden pheasant is a new host for O. mansoni in peninsular Malaysia. PMID:22735854

  7. [Birds' sense of direction].

    Science.gov (United States)

    Hohtola, Esa

    2016-01-01

    Birds utilize several distinct sensory systems in a flexible manner in their navigation. When navigating with the help of landmarks, location of the sun and stars, or polarization image of the dome of the sky, they resort to vision. The significance of olfaction in long-range navigation has been under debate, even though its significance in local orientation is well documented. The hearing in birds extends to the infrasound region. It has been assumed that they are able to hear the infrasounds generated in the mountains and seaside and navigate by using them. Of the senses of birds, the most exotic one is the ability to sense magnetic fields of the earth.

  8. Avian Influenza in Birds

    Science.gov (United States)

    ... Research Making a Candidate Vaccine Virus Related Links Influenza Types Seasonal Avian Swine Variant Pandemic Other Get ... Submit What's this? Submit Button Past Newsletters Avian Influenza in Birds Language: English Español Recommend on ...

  9. Birds as biodiversity surrogates

    DEFF Research Database (Denmark)

    Larsen, Frank Wugt; Bladt, Jesper Stentoft; Balmford, Andrew;

    2012-01-01

    1. Most biodiversity is still unknown, and therefore, priority areas for conservation typically are identified based on the presence of surrogates, or indicator groups. Birds are commonly used as surrogates of biodiversity owing to the wide availability of relevant data and their broad popular...... and applications.?Good surrogates of biodiversity are necessary to help identify conservation areas that will be effective in preventing species extinctions. Birds perform fairly well as surrogates in cases where birds are relatively speciose, but overall effectiveness will be improved by adding additional data...... from other taxa, in particular from range-restricted species. Conservation solutions with focus on birds as biodiversity surrogate could therefore benefit from also incorporating species data from other taxa....

  10. Birds - Breeding [ds60

    Data.gov (United States)

    California Department of Resources — This data set provides access to information gathered on annual breeding bird surveys in California using a map layer developed by the Department. This data layer...

  11. A Clever Bird

    Institute of Scientific and Technical Information of China (English)

    徐芳; 孙菊

    2008-01-01

    @@ 一、故事内容 It is getting hotter and hotter day by day.So the birds don't often fly in the sky in daytime.They usually fly in the evening to look for food.But a bird named Polly is very naughty.He just knows how to fly,so he wants to fly every day.One day,when he is flying in the forest,he feels very thirsty.

  12. Meadow birds as indicators.

    Science.gov (United States)

    Beintema, A J

    1983-09-01

    The use of birds as indicators for 'biological qualities' is not without risks, and should always be based on a sound knowledge of population dynamics and ecological requirements of the species involved. Meadow birds form a comparatively well-studied group of waders, which breed in Dutch grasslands, heavily influenced by agricultural management. The individual species show different tolerances to intensity levels of management, and can therefore be used as indicators for these levels. PMID:24259105

  13. BIRD FLU MASKS

    OpenAIRE

    YASAR KESKIN; OÐUZ OZYARAL

    2006-01-01

    Avian influenza (bird flu) is a disease of birds caused by influenza viruses closely related to human influenza viruses. The potential for transformation of avian influenza into a form that both causes severe disease in humans and spreads easily from person to person is a great concern for world health. The main purpose of a mask is to help prevent particles (droplets) being expelled into the environment by the wearer. Masks are also resistant to fluids, and help protect the wearer from splas...

  14. Global warming and avian occupancy of hot deserts: a physiological and behavioral perspective Calentamiento global y ocupación de desiertos cálidos por aves: una perspectiva fisiológica y conductual

    Directory of Open Access Journals (Sweden)

    BLAIR WOLF

    2000-09-01

    Full Text Available Avian adjustments to desert environments are characterized by an integration of behavior and physiology. These responses serve to maintain homeostasis and conserve vital resources such as water. The small size of birds confers a close coupling to the thermal environment and demands rapid adjustments to environmental challenges. Physiological responses to heat stress include hyperthermia, and increased evaporative cooling as environmental temperatures approach body temperature. Behaviorally, desert birds respond to heat stress by drastically reducing activity during the hottest parts of the day and selecting cool shaded microsites. This characteristic behavioral response presents a potential problem in the face of global warming. If birds totally forgo foraging during extremely hot periods, increased evaporative water loss rates due to higher environmental temperatures could lead to significant episodes of direct mortality for birds in these regions. A simple model is presented which integrates behavior and physiology to predict survival times based on dehydration tolerance, microsite selection and environmental temperature.Los ajustes de las aves a ambientes desérticos se caracterizan por la integración de la conducta y fisiología. Estas respuestas permiten mantener la homeostasis y conservar recursos vitales como el agua. El pequeño tamaño de las aves las acopla al ambiente térmico de un modo estrecho y demanda que ellas muestren respuestas rápidas a los desafíos del ambiente. Cuando la temperatura ambiente se aproxima a la temperatura corporal, las respuestas fisiológicas al estrés térmico incluyen hipertermia, así como un aumento en el enfriamiento por evaporación pulmo-cutánea. Conductualmente las aves responden al estrés calórico con la reducción de los patrones de actividad durante la parte mas calurosa del día, y seleccionando micro-sitios sombrados y más frescos. Frente al fenómeno de calentamiento global, estas

  15. Notas sobre Accidentes Aéreos causados por Aves

    Directory of Open Access Journals (Sweden)

    Oscar Rivera

    2009-06-01

    Full Text Available En varios artículos de opinión publicados en Engormix, el autor se ha referido a dos épocas muy peligrosas para la presentación de accidentes aéreos en diferentes países, situados especialmente en el hemisferio norte (Boreal. Comprenden dos etapas, la primera, en los meses de Septiembre y Octubre, cuando comienza el invierno en el Ártico que deja a millones de aves sin alimento, razón por la cual inician la migración a los diferentes continentes en busca de alimentos; la segunda, durante los meses de Febrero y Marzo, cuando emprenden su regreso al sitio de partida, coincidiendo con la iniciación de la primavera que les garantiza comida suficiente...

  16. The AVES adaptive optics spectrograph for the VLT: status report

    Science.gov (United States)

    Pallavicini, Roberto; Delabre, Bernard; Pasquini, Luca; Zerbi, Filippo M.; Bonanno, Giovanni; Comari, Maurizio; Conconi, Paolo; Mazzoleni, Ruben; Santin, Paolo; Damiani, Francesco; Di Marcantonio, Paolo; Franchini, Mariagrazia; Spano, Paolo; Bonifacio, P.; Catalano, Santo; Molaro, Paolo P.; Randich, S.; Rodono, Marcello

    2003-03-01

    We report on the status of AVES, the Adaptive-optics Visual Echelle Spectrograph proposed for the secondary port of the Nasmyth Adaptive Optics System (NAOS) recently installed at the VLT. AVES is an intermediate resolution (R ≍ 16,000) high-efficiency fixed- format echelle spectrograph which operates in the spectral band 500 - 1,000 nm. In addition to a high intrinsic efficiency, comparable to that of ESI at Keck II, it takes advantage of the adaptive optics correction provided by NAOS to reduce the sky and detector contribution in background-limited observations of weak sources, thus allowing a further magnitude gain with respect to comparable non-adaptive optics spectrographs. Simulations show that the instrument will be capable of reaching a magnitude V = 22.5 at S/N > 10 in two hours, two magnitudes weaker than GIRAFFE at the same resolution and 3 magnitudes weaker than the higher resolution UVES spectrograph. Imaging and coronographic functions have also been implemented in the design. We present the results of the final design study and we dicuss the technical and operational issues related to its implementation at the VLT as a visitor instrument. We also discuss the possibility of using a scaled-up non-adaptive optics version of the same design as an element of a double- or triple-arm intermediate-resolution spectrograph for the VLT. Such an option looks attractive in the context of a high-efficiency large-bandwidth (320 - 1,500 nm) spectrograph ("fast-shooter") being considered by ESO as a 2nd-generation VLT instrument.

  17. Cats protecting birds revisited.

    Science.gov (United States)

    Fan, Meng; Kuang, Yang; Feng, Zhilan

    2005-09-01

    In this paper, we revisit the dynamical interaction among prey (bird), mesopredator (rat), and superpredator (cat) discussed in [Courchamp, F., Langlais, M., Sugihara, G., 1999. Cats protecting birds: modelling the mesopredator release effect. Journal of Animal Ecology 68, 282-292]. First, we develop a prey-mesopredator-superpredator (i.e., bird-rat-cat, briefly, BRC) model, where the predator's functional responses are derived based on the classical Holling's time budget arguments. Our BRC model overcomes several model construction problems in Courchamp et al. (1999), and admits richer, reasonable and realistic dynamics. We explore the possible control strategies to save or restore the bird by controlling or eliminating the rat or the cat when the bird is endangered. We establish the existence of two types of mesopredator release phenomena: severe mesopredator release, where once superpredators are suppressed, a burst of mesopredators follows which leads their shared prey to extinction; and mild mesopredator release, where the mesopredator release could assert more negative impact on the endemic prey but does not lead the endemic prey to extinction. A sharp sufficient criterion is established for the occurrence of severe mesopredator release. We also show that, in a prey-mesopredator-superpredator trophic food web, eradication of introduced superpredators such as feral domestic cats in the BRC model, is not always the best solution to protect endemic insular prey. The presence of a superpredator may have a beneficial effect in such systems. PMID:15998496

  18. Cucolepis cincta gen.n. et sp.n. (Cestoda: Cyclophyllidea) from the squirrel cuckoo Piaya cayana lesson (Aves: Cuculiformes) from Paraguay.

    Science.gov (United States)

    Phillips, Anna J; Mariaux, Jean; Georgiev, Boyko B

    2012-12-01

    Cucolepis gen. n. is erected as monotypic for Cucolepis cincta sp. n., a new species of cyclophyllidean cestode of the family Paruterinidae. The new species is described from the squirrel cuckoo, Piaya cayana Lesson (Aves: Cuculiformes), taken from two localities in Paraguay in 1984 and 1985. This new genus is most similar to the genus Triaenorhina Spasskii et Shumilo, 1965 in terms of the hook morphology and large epiphyseal structures extending from both the handle and guard, but differs in several aspects of the strobilar morphology, such as the shape of the cirrus sac, genital atrium, uterus and paruterine organ. The strobilar morphology of the new genus strongly resembles that of the genus Francobona Georgiev et Kornyushin, 1994, especially the shape of the cirrus sac and genital atrium, yet Francobona spp. lack, the developed epiphyseal structures observed in species of Cucolepis and Triaenorhina. Previous records and the nature of parasite-host associations between cuculiform birds and their cestode parasites are discussed.

  19. Antibiotic resistance in wild birds.

    Science.gov (United States)

    Bonnedahl, Jonas; Järhult, Josef D

    2014-05-01

    Wild birds have been postulated as sentinels, reservoirs, and potential spreaders of antibiotic resistance. Antibiotic-resistant bacteria have been isolated from a multitude of wild bird species. Several studies strongly indicate transmission of resistant bacteria from human rest products to wild birds. There is evidence suggesting that wild birds can spread resistant bacteria through migration and that resistant bacteria can be transmitted from birds to humans and vice versa. Through further studies of the spatial and temporal distribution of resistant bacteria in wild birds, we can better assess their role and thereby help to mitigate the increasing global problem of antibiotic resistance. PMID:24697355

  20. Tracking migrating birds

    DEFF Research Database (Denmark)

    Willemoes, Mikkel

    and a forest reserve. In the degraded habitat all species used more space, although the consequence on bird density is less clear. Two manuscripts relate the migratory movements of a long-distance migrant with models of navigation. One compares model predictions obtained by simulation with actual movements......Migratory movements of birds has always fascinated man and led to many questions concerning the ecological drivers behind, the necessary adaptations and the navigational abilities required. However, especially for the long-distance migrants, basic descriptions of their movements are still lacking...... in when and where the bird compensated for the displacement. The last paper investigates effects of habitat shading on the performance of light-level based geolocation and compares experimental data with data from real tracking studies. This illustrates some of the potential problems and limitations...

  1. [Birds' sense of direction].

    Science.gov (United States)

    Hohtola, Esa

    2016-01-01

    Birds utilize several distinct sensory systems in a flexible manner in their navigation. When navigating with the help of landmarks, location of the sun and stars, or polarization image of the dome of the sky, they resort to vision. The significance of olfaction in long-range navigation has been under debate, even though its significance in local orientation is well documented. The hearing in birds extends to the infrasound region. It has been assumed that they are able to hear the infrasounds generated in the mountains and seaside and navigate by using them. Of the senses of birds, the most exotic one is the ability to sense magnetic fields of the earth. PMID:27522832

  2. Birds build camouflaged nests

    OpenAIRE

    Bailey, Ida Elizabeth; Muth, Felicity; Morgan, Kate; Meddle, Simone L.; Healy, Susan Denise

    2014-01-01

    This work was supported by the Biotechnology and Biological Sciences Research Council (BBSRC) (BB/I019502/1 to S.D.H. and S.L.M.) and by Roslin Institute Strategic Grant funding from the BBSRC (to S.L.M). It is assumed that many birds attempt to conceal their nests by using camouflage. To our knowledge, however, no previous experimental studies have explicitly tested this assumption. To explore whether birds choose materials that match the background colors of nest sites to reduce the cons...

  3. First report of five nematode species in Phasianus colchicus Linnaeus (Aves, Galliformes, Phasianidae in Brazil Primeiro registro de cinco espécies de nematóides em Phasianus colchicus Linnaeus (Aves, Galliformes, Phasianidae no Brasil

    Directory of Open Access Journals (Sweden)

    Roberto Magalhães Pinto

    2004-12-01

    Full Text Available This paper deals with the first report of the nematodes Dispharynx nasuta (Rudolphi, 1819 Stiles & Hassall, 1920, Gongylonema ingluvicola Ransom, 1904, Oxyspirura mansoni (Cobbold, 1879 Ransom, 1904, Subulura brumpti (Lopez-Neyra, 1922 Cram, 1923 and Tetrameres fissipina (Diesing, 1860 Travassos, 1914, parasitizing the ring-necked pheasant, Phasianus colchicus Linnaeus, 1758 in Brazil. Morphological data on the parasites as well as on the prevalence, mean intensity, mean abundance and range of intensity of the nematodes in the infected birds are provided.O presente trabalho diz respeito à primeira referência dos nematóides Dispharynx nasuta (Rudolphi, 1819 Stiles & Hassall, 1920, Gongylonema ingluvicola Ransom, 1904, Oxyspirura mansoni (Cobbold, 1879 Ransom, 1904, Subulura brumpti (Lopez-Neyra, 1922 Cram, 1923 e Tetrameres fissipina (Diesing, 1860 Travassos, 1914, parasitando o faisão-coleira, Phasianus colchicus Linnaeus, 1758 no Brasil. São fornecidos dados morfológicos sobre os parasitos, bem como sobre a prevalência, intensidade média, abundância média e amplitude de variação da intensidade de infecção dos nematóides nas aves parasitadas.

  4. Tarphonomus, a new genus of ovenbird (Aves : Passeriformes : Furnariidae) from South America

    Science.gov (United States)

    Chesser, R.T.; Brumfield, R.T.

    2007-01-01

    Tarphonomus, a new genus of ovenbird (Aves: Passeriformes: Furnariidae) from South America, is described. Species included in the new genus, formerly placed in Upucerthia, are T. certhioides and T. harterti.

  5. Vascular and Neural Dysfunctions in Obese Zucker Rats: Effect of AVE7688

    Directory of Open Access Journals (Sweden)

    Eric P. Davidson

    2009-01-01

    Full Text Available The purpose of this study was to determine whether AVE7688 a drug that inhibits both angiotensin converting enzyme and neutral endopeptidase activity protects vascular and nerve functions in an animal model of metabolic syndrome. Obese Zucker rats at 20 weeks of age were treated for 12 weeks with AVE7688. Vasodilation in epineurial arterioles was measured by videomicroscopy and nerve conduction velocity was measured following electrical stimulation. Treatment with AVE7688 improved vascular relaxation in response to acetylcholine and motor and sensory nerve conduction velocity. In obese Zucker rats superoxide levels and nitrotyrosine staining were elevated in the aorta and treatment corrected both conditions. Obese Zucker rats were hypoalgesic in response to a thermal stimulus and demonstrated signs of impaired tactile response and both conditions were significantly improved with treatment. Even though obese Zucker rats are normoglycemic vascular and neural dysfunctions develop with age and can be improved by treatment with AVE7688.

  6. Chinese and Foreign Bird Lovers Watch Birds in Deyang

    Institute of Scientific and Technical Information of China (English)

    2009-01-01

    <正>Invited by the Sichuan Provincial People’s Association for Friendship with Foreign Countries (SIFA) and the Chengdu Bird Watching Society, 60 Chinese and foreign bird lovers went to Deyang, a city in Sichuan Province that had suffered grave damages in the Wenchuan earthquake, to watch birds,

  7. AVES SDK: Bridging the Gap between Simulator and Flight Systems Designer

    OpenAIRE

    Gerlach, Torsten; Durak, Umut

    2015-01-01

    Developing and integrating a new concept in a flight simulator usually requires rigorous implementation and integration steps which involves various parties. German Aerospace Center (DLR) is developing and operating the Air Vehicle Simulator (AVES), and focusses on shortening the simulator implementation and integration lead time. This effort targets at bridging this gap by promoting the software infrastructure of the flight simulator as AVES Software Development Kit (SDK) for flight system d...

  8. The relative contribution of fruits and arthropods to the diet of three trogon species (Aves, Trogonidae in the Brazilian Atlantic Forest A contribuição relativa de frutos e artrópodes para a dieta de três espécies de surucuás (Aves, Trogonidae na Mata Atlântica

    Directory of Open Access Journals (Sweden)

    Marco Aurélio Pizo

    2007-06-01

    Full Text Available Trogons are pan-tropical forest birds that eat a mix of fruits and arthropods. With direct observations of wild feeding birds, I assessed the relative contribution of fruits and arthropods to the diet of three trogon species (Trogonviridis, T.surrucura, and T.rufus at Parque Estadual Intervales, southeast Brazil. Fruits and arthropods made the bulk of the food items recorded, with a tendency of frugivory increasing with body mass. The Trogon species differed in the proportion of fruits and arthropods taken, with T.viridis being the most frugivorous species (66% of feeding bouts, n = 47. The relative contribution of fruits and arthropods did not differ between the wet and dry seasons for any species. In the omnivorous gradient, T.viridis is close to the frugivorous extreme, whereas T.surrucura and T.rufus is next to the insectivorous end. Such a distinction may have important consequences for the territoriality and social behavior of these birds.Os surucuás são aves florestais pantropicais que se alimentam de frutos e artrópodes. Com observações diretas de aves forrageando na natureza, estudei a contribuição relativa de frutos e artrópodes para a dieta de três espécies de surucuás (Trogonviridis, T.surrucura, and T.rufus no Parque Estadual Intervales, sudeste do Brasil. Frutos e artrópodes foram os itens mais registrados, com uma tendência do grau de frugivoria aumentar com o aumento da massa corporal da ave. As três espécies diferiram em relação à proporção de frutos e artrópodes de que se alimentam; T.viridisfoi a espécie mais frugívora (66% dos registros, n = 47. As contribuições relativas de frutos e artrópodes para a dieta não diferiram entre as estações seca e úmida para nenhuma das três espécies. A diferença no grau de frugivoria aqui revelada pode ter conseqüências importantes para a territorialidade e organização social dos surucuás.

  9. Relación del Virus del Oeste del Nilo con las Aves Silvestres

    Directory of Open Access Journals (Sweden)

    Diego Soler-Tovar

    2009-06-01

    Full Text Available El Virus del Oeste del Nilo (VON es un Flavivirus que produce una encefalomielitis y puede afectar aves y mamíferos; los efectos varían desde poco notorios hasta la muerte, y en su difusión es importante la participación de especies animales como las aves donde es transmitido a través de mosquitos vectores. El VON se conoce de Uganda desde 1937 y está ampliamente distribuido en África, el oriente y la región sur y tropical de Eurasia. En el Hemisferio Occidental, el VON fue la primera causa de enfermedad en poblaciones de aves y humanos en Nueva York en 1999 y la epizootia ha continuado hasta ahora. La presencia del virus en Norteamérica junto con un número relativamente grande de aves migratorias susceptibles al agente, hacen de este virus de especial atención por su posible impacto sobre la fauna silvestre, los animales domésticos y el hombre en Sudamérica. La infección y mortalidad de aves normalmente precede a las epidemias en humanos y por lo tanto el monitoreo de aves es una herramienta preventiva efectiva que debe ser considerada seriamente.

  10. Crianza Artificial de Aves Rapaces Nocturnas en Cautiverio

    Directory of Open Access Journals (Sweden)

    Carolina Sastre-Corredor

    2009-06-01

    Full Text Available El objetivo de este trabajo, fue realizar el seguimiento a dos casos de aves rapaces neonatos que ingresaron al Centro de Recepción y Rehabilitación de Fauna Silvestre (CRRFS de la Secretaria Distrital de Ambiente (SDA, con el fin de registrar, conocer e informar el manejo general de los mismos. Al momento de ingresar el primer grupo de ejemplares al CRRFS, se detectaron varias limitaciones de tipo físico, por ejemplo insumos alimentarios en mal estado o inexistencia de los mismos, y de tipo profesional, como inexistencia de plan nutricional para la especie. Durante su edad adulta, se detectaron además otras limitaciones también de tipo físico, puesto que no se establecieron a tiempo espacios adecuados para su alojamiento. Al ingreso de cada ejemplar, se  asignó un número de Historia Clínica, y  en esta se registraron los datos de cada ejemplar (Anamnésicos, peso, edad, morfometría y observaciones de cada sistema, entre otras. Posterior a su examen clínico, se alojaron en la Zona de Neonatos del CRRFS. Se efectuó el seguimiento a cada ejemplar, registrando en un formato la fecha, peso y longitud total, además de las observaciones encontradas en el día, como la presencia de plumón, ojos más abiertos, presencia cañones de plumas o muerte, entre otros. Para evitar la impronta de los ejemplares, se alojaron en guacales cubiertos totalmente para así aislarlos visualmente del cuidador. Durante los procesos de rehabilitación, se efectúo el seguimiento al consumo de dieta, registrando fecha, tipo de dieta, estado (Presa viva o muerta, peso de la dieta entregada, peso de los restos recogidos, para  así evaluar y obtener un promedio de lo consumido. Además de realizar los ejercicios de vuelo, en los cuales se obligaba a volar a las aves y cruzar el encierro de extremo a extremo, llegando de percha a percha, hasta lograr la cantidad de vuelos adecuada sin observase agitadas. Para dar por terminado el seguimiento y los procesos de

  11. [Anesthesia in birds].

    Science.gov (United States)

    Grimm, F

    1987-01-01

    Anaesthesia in birds is ordered by law and is also necessary for various operations and manipulations. Anaesthesia by injection of Ketamin, which in special cases may be combined with Diazepam, has been found useful. Anaesthesia by inhalation with Halothan, Methoxyfluran or Isofluran is the most careful method. Local anaesthesia has few indications.

  12. Bird community composition

    Science.gov (United States)

    Antrobus, T.J.; Guilfoyle, M.P.; Barrow, W.C.; Hamel, P.B.; Wakeley, J.S.

    2000-01-01

    Neotropical migrants are birds that breed in North America and winter primarily in Central and South America. Long-term population studies of birds in the Eastern United States indicated declines of some forest-dwelling birds, many of which winter in the Neotropics (Peterjohn and others 1995). These declines were attributed to loss of wintering and breeding habitat due to deforestation and fragmentation, respectively. Many species of Nearctic migrants--birds that breed in the northern regions of North America and winter in the Southern United States--are also experiencing population declines. Because large areas of undistrubed, older, bottomland hardwood forests oftern contain large numbers of habitat specialists, including forest-interior neotropical migrants and wintering Nearctic migrants, these forests may be critical in maintaining avian diversity. This study had two primary objectivs: (1) to create a baseline data set that can be used as a standard against which other bottomland hardwood forests can be compared, and (2) to establish long-term monitoring stations during both breeding and wintering seasons to discern population trends of avian species using bottomland hardwood forests.

  13. The Umbrella Bird

    NARCIS (Netherlands)

    Crandall, Lee S.

    1949-01-01

    When CHARLES CORDIER arrived from Costa Rica on October 9, 1942, bringing with him, among other great rarities, three Bare-necked Umbrella Birds (Cephalopterus ornatus glabricollis), it seemed to us that the mere possession of such fabulous creatures was satisfaction enough. True, they were not beau

  14. Birds of Prey.

    Science.gov (United States)

    Irwin, Harriet

    Introducing students to different hawks and owls found in Wisconsin and building a basis for appreciation of these birds in their own environment is the purpose of this teacher's guide. Primarily geared for upper elementary and junior high grades, the concepts presented could be used in conjunction with the study of ecology. A filmstrip is…

  15. Nanoscale magnetoreceptors in birds

    DEFF Research Database (Denmark)

    Solov'yov, Ilia; Greiner, Walter

    2012-01-01

    The Earth's magnetic field provides an important source of directional information for many living organisms, especially birds, but the sensory receptor responsible for magnetic field detection still has to be identified. Recently, magnetic iron oxide particles were detected in dendritic endings ...

  16. Science Is for the Birds

    Science.gov (United States)

    Potenza, Susan Ade

    2007-01-01

    In this article, the author discusses a five-month interdisciplinary bird study that she designed for her seventh-grade students that combines life science, technology, writing, art, mathematics, social studies and literature. The driving force behind this yearly unit is the BirdSleuth eBird program (formerly the Cornell University Classroom…

  17. Birding--Fun and Science

    Science.gov (United States)

    McIntosh, Phyllis

    2014-01-01

    This feature article presents the basics of birding, or bird watching, and discusses its appeal, especially to serious birders. A section on "citizen scientists" explains organizations that collect data on birds and describes projects they organize. Other sections discuss the legacy of John James Audubon and the bald eagle.

  18. Birds of Prey of Wisconsin.

    Science.gov (United States)

    Hamerstrom, Frances

    This copiously illustrated document is designed to be a field quide to birds of prey that are common to Wisconsin, as well as to some that enter the state occasionally. An introduction discusses birds of prey with regard to migration patterns, the relationship between common names and the attitudes of people toward certain birds, and natural signs…

  19. Attracting Birds to Your Backyard.

    Science.gov (United States)

    Joyce, Brian

    1994-01-01

    Discusses methods for drawing birds to outdoor education areas, including the use of wild and native vegetation. Lists specific garden plants suitable for attracting birds in each season. Includes a guide to commercial bird seed and instructions for building homemade birdfeeders and nestboxes. (LZ)

  20. Birds and wind energy

    Energy Technology Data Exchange (ETDEWEB)

    Langston, Rowena

    2011-07-01

    Full text: Climate change, perhaps more accurately described as climate disruption, is considered to be a major long-term threat to biodiversity, with a high probability that the underlying cause is due to anthropogenic greenhouse gas emissions. Renewable energy is an important component of a programme of measures to combat further climate change, to include improved energy efficiency and demand management. Wind energy is the most advanced renewable energy source and is a global industry onshore and, increasingly, offshore. However, as with any form of energy generation, wind energy also has potential environmental costs which have to be balanced against benefits. The environmental impacts on birds derive from the following: collision risk, in particular from the moving rotor blades; displacement arising from disturbance during construction, operation or decommissioning; habitat loss or change leading to alteration of food availability; barrier effects leading to deviation of long distance migratory flights or disruption of local flights between feeding, nesting, and roosting/loafing locations. Not all species of birds, or individuals within a species, are equally susceptible to negative interactions with wind turbines, and neither are the population consequences of impacts equivalent. Of greatest concern are bird species of conservation concern that exhibit behaviours that place them at risk of an adverse impact, notably when that impact leads to a reduction in population size that is unlikely to be compensated for. In particular, cumulative impacts arising from multiple wind farms or wind farms in combination with other developments are of concern. There has been a welcome increase in research effort and peer-reviewed publications on the subject of birds and wind energy in recent years. Increasing our understanding of impacts is essential to delivering possible solutions and this paper reviews current knowledge for birds. (Author)

  1. Taxonomy of Greater White-fronted Geese (Aves: Anatidae)

    Science.gov (United States)

    Banks, Richard C.

    2011-01-01

    Five subspecies of the Greater White-fronted Goose, Anser albifrons (Scopoli, 1769), have been named, all on the basis of wintering birds, and up to six subspecies have been recognized. There has been confusion over the application of some names, particularly in North America, because of lack of knowledge of the breeding ranges and type localities, and incorrect taxonomic decisions. There is one clinally varying subspecies in Eurasia, one that breeds in Greenland, and three in North America, one newly named herein.

  2. AVES: an adaptive optics visual echelle spectrograph for the VLT

    Science.gov (United States)

    Pasquini, Luca; Delabre, Bernard; Avila, Gerardo; Bonaccini, Domenico

    1998-07-01

    We present the preliminary study of a low cost, high performance spectrograph for the VLT, for observations in the V, R and I bands. This spectrograph is meant for intermediate (R equals 16,000) resolution spectroscopy of faint (sky and/or detector limited) sources, with particular emphasis on the study of solar-type (F-G) stars belonging to the nearest galaxies and to distant (or highly reddened) galactic clusters. The spectrograph is designed to use the adaptive optics (AO) systems at the VLT Telescope. Even if these AO systems will not provide diffraction limited images in the V, R and I bands, the photon concentration will still be above approximately 60% of the flux in an 0.3 arcsecond aperture for typical Paranal conditions. This makes the construction of a compact, cheap and efficient echelle spectrograph possible. AVES will outperform comparable non adaptive optic instruments by more than one magnitude for sky- and/or detector-limited observations, and it will be very suitable for observations in crowded fields.

  3. ANÁLISES COPROPARASITOLÓGICAS DE AVES SILVESTRES CATIVAS

    Directory of Open Access Journals (Sweden)

    Alessandra Snak

    2014-12-01

    Full Text Available In most instances of parasitism in captive birds there is no expression of clinical signs. This fact underscores the importance of performing frequent parasitological examinations in these animals. The aim of this study was to do a coproparasitological analysis to monitor parasitic infections in captive birds in Danilo Galafassi Municipal Park (Municipal Zoo of Cascavel-PR, project approved by the Committee of Ethics and Animal Welfare (CEBEA Campus Palotina-UFPR, protocol nº 29/2010. A total of 228 fecal samples were analyzed from 37 species of captive birds from 22 enclosures in the period from August 2010 to July 2012. Chilled feces were analyzed through flotation methods of Willis-Mollay and simple sedimentation of Hoffmann, Pons and Janer. Out of the analyzed samples, 127 (55.7% were positive and among these 55 (43.3% presented mixed infection. The parasites that were found belonged to the genus Strongyloides, Eimeria, Capillaria, Deletrocephalus and Isospora, the superfamilies Strongyloidea, Ascaroidea and Spiruroidea, the order Trichurida and the class Cestoda. The examinations results of the enclosure of Jabiru mycteia (tuiuiú and Cariama cristata (seriema were negative throughout the study period. Hygienic-sanitary measures and movement control measures of animals and people circulation were introduced to minimize bird’s infection, but it requires further analysis to assess their impact.

  4. Aprendizaje vocal y dialectos de canto en las aves

    Directory of Open Access Journals (Sweden)

    Pablo L. Tubaro

    1989-01-01

    Full Text Available Bird song díalects, that Is the existence of particular types of song shared by birds which inhabit a local area, have been functionally explained in terms of a mechanism which reduces gene flow between neighbouring populatíons, manipulation of territorial competítors, or adaptation of a signal to long range communícation in a partieular habitat. However, no one of these hypotheses has successfully accounted for the díalect diversity present in the species studied. In terms proximal causes, dialects are the product of vocal learning that take place during different stages of bird Iífe, in the context of a partieular life history. In this paper. we show the need of acomparative study of vocal learning processes, using species which are phylogeneticaly close but ecologically distinct, and unrelated species which occupy similar ecological niches, to understand the selective condítíons which have shaped the vocal ontogeny and, in turn, make clear the origin of Intraspecific vocal diversity

  5. Eocene diversification of crown group rails (Aves: Gruiformes: Rallidae.

    Directory of Open Access Journals (Sweden)

    Juan C García-R

    Full Text Available Central to our understanding of the timing of bird evolution is debate about an apparent conflict between fossil and molecular data. A deep age for higher level taxa within Neoaves is evident from molecular analyses but much remains to be learned about the age of diversification in modern bird families and their evolutionary ecology. In order to better understand the timing and pattern of diversification within the family Rallidae we used a relaxed molecular clock, fossil calibrations, and complete mitochondrial genomes from a range of rallid species analysed in a Bayesian framework. The estimated time of origin of Rallidae is Eocene, about 40.5 Mya, with evidence of intrafamiliar diversification from the Late Eocene to the Miocene. This timing is older than previously suggested for crown group Rallidae, but fossil calibrations, extent of taxon sampling and substantial sequence data give it credence. We note that fossils of Eocene age tentatively assigned to Rallidae are consistent with our findings. Compared to available studies of other bird lineages, the rail clade is old and supports an inference of deep ancestry of ground-dwelling habits among Neoaves.

  6. Investigation of Leptin gene in broiler and layer chicken lines Investigação do gene da Leptina em linhagens de aves de corte e postura

    Directory of Open Access Journals (Sweden)

    Kerli Ninov

    2008-04-01

    Full Text Available Leptin, a polypeptide hormone secreted mainly by adipose tissue, plays an important role in feed intake regulation, energy metabolism and reproduction in several species. Its function has been intensively studied in mammals; however, in birds limited information is available. The cDNA sequence for chicken leptin has been reported, and high hepatic expression levels of leptin were associated with fat deposition in selected bird lines. However, controversies still remain concerning to the chicken leptin gene and several authors failed to amplify this gene from genomic DNA or cDNA. In view of this controversy and the importance of this gene, the present study aimed to investigate the leptin gene in a population of birds developed by Embrapa Swine and Poultry Research Center (Brazil. First of all, the sequences of Gallus gallus leptin gene (GenBank AF012727 and Mus musculus (GenBank NM_008493 were aligned with the objective of designing primers in conserved regions among the two species, since 94.6% of similarity is described in the literature in those species. For all four pairs of primers designed, several amplification tests were performed with both DNA and cDNA, but neither unique fragment nor expected band size was ever achieved. The leptin sequence in GenBank does not represent the sequence of the chicken leptin gene.A leptina, hormônio polipeptídico secretado principalmente pelo tecido adiposo, tem um papel importante na regulação da ingestão de alimentos, metabolismo de energia e reprodução em mamíferos. A função do gene da leptina tem sido intensamente estudada em mamíferos, porém, em aves, ainda é pouco conhecida. O cDNA deste gene foi identificado em galinhas, e a alta expressão hepática e os níveis de leptina no plasma foram associados à alta deposição de gordura presente em linhagens de aves selecionadas. Entretanto, permanecem controvérsias sobre o gene da leptina em galinhas, pois diversos autores não conseguiram

  7. Rahvusvahelise kogemusega personalijuht Ave Kareda: Personalijuhi koostöö juhiga peaks rajanema aususel ja usaldusel / Ave Kareda ; interv. Tiina Saar

    Index Scriptorium Estoniae

    Kareda, Ave

    2009-01-01

    Logistikaettevõtte DHL Baltikumi personalijuht Ave Kareda vastab küsimustele, mis puudutavad ettevõtete personalipoliitikat, personalijuhi rolli, personaliosakonna võimalusi juhi ja inimeste vahel, rahvusvahelisuse osatähtsust personalitöös, mentorlust ning juhi ebaeetilisi otsuseid raskes olukorras

  8. Níveis de cloreto de sódio para aves de corte da linhagem Colonial criadas em semiconfinamento Sodium chloride levels for Colonial broiler chickens reared in free-range system

    Directory of Open Access Journals (Sweden)

    Sandra Regina Freitas Pinheiro

    2011-07-01

    Full Text Available Objetivou-se determinar níveis de inclusão de cloreto de sódio (NaCl em rações para aves machos e fêmeas da linhagem Colonial nas fases inicial (1 a 28 dias, de crescimento (28 a 56 dias e final (56 a 84 dias criadas em semiconfinamento. Em cada ensaio, 480 aves com idade correspondente à fase de criação foram alojadas em 24 unidades experimentais contendo áreas de abrigo e de pastejo. O delineamento experimental utilizado foi o inteiramente casualizado, em esquema fatorial 4 × 2 (níveis de NaCl e sexos, totalizando oito tratamentos e três repetições de 20 aves. Os níveis de NaCl avaliados foram: 0,20; 0,40; 0,60 e 0,80% na fase inicial; 0,10; 0,30; 0,50 e 0,70% na fase de crescimento e 0,10; 0,25; 0,40 e 0,55% na fase final. Foram avaliados o ganho de peso, o consumo de ração, a ingestão de água, a conversão alimentar, o potencial hidrogeniônico, a pressão parcial de gás carbônico no sangue, a concentração de hematócritos e os teores de sódio e cloro no sangue. Para a fase inicial, o nível recomendado é de 0,53% de NaCl na ração para aves de ambos os sexos. Para a fase de crescimento, os níveis de 0,40 e 0,43% de NaCl, respectivamente, para machos e fêmeas e, para a fase final, de 0,25% para aves de ambos os sexos, atendem às exigências nutricionais.The objective of this work was to determine inclusion levels of sodium chloride (NaCl in diets for male and female Colonial strain birds in the starter (from one to 28 days of age, growing (from 28 to 56 days of age and finisher (from 56 to 84 days of age phases reared in free-range system. In each trial, 480 birds at age corresponding to the rearing phase were housed in 24 experimental units containing areas of shelter and pasture. The experimental design used was a completely randomized in a 4 × 2 factorial arrangement (NaCl levels × sex, totaling eight treatments and three replications of 20 birds. Levels of NaCl evaluated were: 0.20, 0.40, 0.60 and 0.80% in

  9. Directing STUPID FUCKING BIRD

    OpenAIRE

    Burris, Katherine Carton

    2014-01-01

    In my final year as an undergraduate at the University of California, Santa Cruz, I proposed to direct STUPID FUCKING BIRD (an adaption by Aaron Posner of Chekhov's The Seagull) in the Experimental Theater. This capstone thesis details the motivations behind my selection of this play, the decision to direct, the technical preparations involved in its staging, and a brief analysis of Posner's text as an adaptation and response to Chekhov's nineteenth century classic. Taking his cue from Chekh...

  10. Free like Birds (?)

    OpenAIRE

    Kukubajska, Marija Emilija

    2015-01-01

    Intro to performance 7th International conference on Knowledge and power FREE like BIRDS (?) is a project of the interdisciplinary and multi-media Art-Po concept established in 1973, and performed on variety of issues over the years. From the American children hospitals activity (Columbia University, to Asia-Pacific museum in Pasadena, Gallery Kubaiski No. Hollywood, California, the University of La Jolla Marmount, California Wignal Museum, Irvine Fine Arts Center, Vietnamese New Yea...

  11. Bird Watching in China

    Institute of Scientific and Technical Information of China (English)

    CHRIS; DEVONSHIRE-ELLIS

    2006-01-01

    Being based in, and conducting business in, some of China's largest cities is an exciting, yet stressful occupation and 1 like to relax by taking a pair of binoculars, getting out into the open air of China's huge countryside, and spending time seeing what birds I can identify. I'm not really a twitcher (one who relentlessly pursues sightings of as many different species as possible)-just happy to get into nature. In my travels around the country, I listed

  12. Nuevos registros de aves para el Estado de México New records of birds for the State of Mexico

    Directory of Open Access Journals (Sweden)

    Fernando Urbina-Torres

    2012-12-01

    Full Text Available Se informa por primera vez sobre la presencia en el Estado de México del halcón guaco (Herpetotheres cachinnans, el halcón enano (Falco rufigularis, la guacamaya verde (Ara militaris, el cuclillo manglero (Coccyzus minor, la titira enmascarada (Tityra semifasciata y la golondrina sinaloense (Progne sinaloae. Estos registros fueron realizados en el Parque Natural Sierra Nanchititla. Ara militaris y P. sinaloae se encuentran clasificadas como especies en riesgo, de acuerdo con criterios nacionales e internacionales.We report for the first time the presence of Laughing Falcon (Herpetotheres cachinnans, Bat Falcon (Falco rufigularis, Military Macaw (Ara militaris, Mangrove Cuckoo (Coccyzus minor, Masked Tityra (Tityra semifasciata, and Sinaloa Martin (Progne sinaloae in the State of México. These records were made in the Parque Natural Sierra Nanchititla. A. militaris and P. sinaloae are considered at risk in accordance with national and international criteria.

  13. The North Sea Bird Club

    International Nuclear Information System (INIS)

    This paper reports that the creation of a club for the purpose of encouraging oil and gas workers to watch birds may not at first seem a viable proposition. To the layperson, birds offshore conjures up an image of hundreds of seagulls following fishing boats, and very little else. Also, the act of birdwatching is not seen as a typical offshore worker's activity. Anyone who has worked on an installation offshore and who has any interest in wildlife will be aware of the occasional presence of land-birds. Two decades ago, prompted by some keen offshore workers, a single oil company set up a monitoring program, which quickly became popular with a number of its employees. Birds seem offshore were recorded on data forms and collected together. At this stage the club was purely another recreation facility; however, when the data were collated it was soon realized that installations offshore were being used as staging posts by birds on migration, and that the information being collected would be of great interest in the study of bird movements. All over Britain, at strategic points on the coastline, there are bird observatories which record the arrival and departure of migrating birds. The presence of several hundred solid structures up and down the North Sea, which are used by birds en route, represents a huge, unique bird observatory, capable of uncovering facts about bird migration which have long eluded land-based scientists. Eleven years ago, the North Sea Bird Club began, composed of eight member companies, a recorder from Aberdeen University and a representative from the Nature Conservancy Council. The club received data from 41 installations, and the recorder collated these on Aberdeen University's computer and produced an annual report of sightings

  14. Migratory birds, ticks, and Bartonella

    OpenAIRE

    Molin, Ylva; Lindeborg, Mats; Nyström, Fredrik; Madder, Maxime; Hjelm, Eva; Olsen, Björn; Thomas G.T. Jaenson; Ehrenborg, Christian

    2011-01-01

    Bartonella spp. infections are considered to be vector-borne zoonoses; ticks are suspected vectors of bartonellae. Migratory birds can disperse ticks infected with zoonotic pathogens such as Rickettsia and tickborne encephalitis virus and possibly also Bartonella. Thus, in the present study 386 tick specimens collected in spring 2009 from migratory birds on the Mediterranean islands Capri and Antikythera were screened for Bartonella spp. RNA. One or more ticks were found on 2.7% of the birds....

  15. Rhode Island, Connecticut, New York, and New Jersey ESI: BIRDS (Bird Polygons)

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — This data set contains sensitive biological resource data for wading birds, shorebirds, waterfowl, raptors, diving birds, pelagic birds, passerine birds, gulls and...

  16. Sensitivity of Coastal Environments and Wildlife to Spilled Oil: Central California: BIRDS (Bird Polygons)

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — This data set contains sensitive biological resource data for alcids, diving birds, gulls, terns, passerine birds, pelagic birds, raptors, shorebirds, wading birds,...

  17. Sensitivity of Coastal Environments and Wildlife to Spilled Oil: Upper Coast of Texas: BIRDS (Bird Polygons)

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — This data set contains sensitive biological resource data for diving birds, gulls, terns, passerine birds, pelagic birds, raptors, shorebirds, wading birds,...

  18. Sensitivity of Coastal Environments and Wildlife to Spilled Oil: South Florida: BIRDS (Bird Polygons)

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — This data set contains sensitive biological resource data for diving birds, gulls, terns, passerine birds, pelagic birds, raptors, shorebirds, wading birds, and...

  19. Pretty Bird by Bob Sinclair

    Institute of Scientific and Technical Information of China (English)

    2000-01-01

    Recently I was reminded of a story which my mother swears is trus (though she doesn t call me Bobby muchanymore):Back in 1958,when I was just past four years old,my parents gave me a young parakeet.My mother determinedthat our parakeet would learn to talk,and to this end sat at the microphone of a borrowed tape recorder for a full 1/2hour,saying over and over again:“Pretty bird!Pretty bird!Pretty bird!Pretty bird!...”and so on.The resultingtaped message was played for our parakeet at least once pe...

  20. Deposição diária e sazonal de gordura subcutânea em Phacellodomus rufifrons (Wied (Aves, Furnariidae Daily and seasonal deposition of subcutaneous fat in Phacellodomus rufifrons, a Neotropical ovenbird

    Directory of Open Access Journals (Sweden)

    Fernando F. Goulart

    2007-01-01

    Full Text Available Aves que habitam regiões temperadas acumulam gordura a fim de sobreviver às condições extremas da noite. Níveis de deposição de gordura nessas aves aumentam ao longo do dia e atingem um pico no entardecer e diminuem ao longo da noite, quando a alimentação não é possível. Aliado a isso, existe o aumento estacional dos depósitos de lipídeos assim que o inverno se aproxima, e permite que a ave sobreviva naquela estação. Pouco se conhece sobre esses padrões em aves tropicais. O presente trabalho verifica a dinâmica de deposição de gordura de Phacellodomus rufifrons (Wied, 1821, um furnarídeo (Passeriformes, Furnariidae endêmico da região Neotropical, em um ambiente tropical bastante sazonal, o cerrado do sudeste do Brasil. O trabalho de campo foi realizado entre agosto de 2001 a julho de 2002, no Parque Nacional da Serra do Cipó, município de Jaboticatubas, Minas Gerais. Os dados de gordura subcutânea foram classificados visualmente em aves capturadas. Foram estabelecidas quatro categorias para a variação da gordura subcutânea depositada na cavidade da fúrcula. Foi encontrado um aumento significativo nos níveis de gordura ao longo do dia, como para espécies de regiões temperadas, mas não ouve variação ao longo das estações do ano. A massa corporal média não variou ao longo do ano e nem ao longo do dia. Os resultados mostram que variações diárias no cerrado podem atuar como fator de estresse que pode desencadear a adaptações fisiológicas para atravessar a noite. Por outro lado, variações estacionais podem ser balanceadas pelo habito dos indivíduos de P. rufifrons pernoitarem durante todo o ano dentro do ninho, um comportamento relativamente raro entre os Passeriformes.It is known that birds inhabiting temperate regions accumulate fat in order to survive a night of extreme conditions. Levels of fat depots arise as the day goes by, reaching its pick at dusk and decreasing along the night hours when no

  1. Fish and Bird

    Institute of Scientific and Technical Information of China (English)

    毛秀波

    2010-01-01

    人物:B——Bird L——Little Fish M——Mother Fish N——Narracor(旁白)道具:角色头饰 N:一条生活在河里的Little Fish对天空充满了好奇,一心想飞到天空去看看。此时,Little Fish正依偎在Mother Fish身边,好奇地望着天空。

  2. ENFERMEDAD DE NEWCASTLE EN AVES DE TRASPATIO DEL EJE CAFETERO COLOMBIANO

    Directory of Open Access Journals (Sweden)

    Marlyn Romero P

    2009-08-01

    Full Text Available Objetivo. Evaluar la circulación del virus de la enfermedad de Newcastle (ENC en aves de traspatio de siete municipios del eje cafetero por medio de la técnica ELISA. Materiales y métodos. Fueron encuestados 465 predios para evaluar las normas de bioseguridad de las aves de traspatio de los municipios de Armenia, Circasia, Quimbaya, Montenegro, Filandia, Calarcá y La Tebaida del Departamento del Quindío. Se analizaron 662 muestras de suero para detectar anticuerpos IgG contra el virus de la ENC por ELISA. Resultados. La seroprevalencia de la ENC en la población de aves evaluada fue del 30.7%.(203/662, que corresponde al 38.5% de los predios encuestados. No se encontró asociación entre la especie y la seroreactividad (p=0.21, ni entre la distribución de los anticuerpos por grupos productivos y la edad (p>0.05. Los predios de traspatio son manejados de forma extensiva, albergan en las mismas instalaciones aves de diferentes especies y edades en el 64.3% (299/465, con edades en intervalos entre tres meses y cinco años. Fueron detectadas malas prácticas de manejo de la gallinaza y la mortalidad, sin encontrar asociación estadísticamente significativa entre las variables evaluadas y la presencia de anticuerpos anti-virus de ENC (p>0.05. Conclusiones. Es necesario el establecimiento de planes adecuados de vacunación de las aves de traspatio, la vigilancia epidemiológica activa, la observación de los casos sospechosos, sin dejar de lado la educación y capacitación, sobre el adecuado manejo de los animales, dirigida a los propietarios de las aves como medidas de control de la enfermedad.

  3. LOS TANINOS EN LA ALIMENTACIÓN DE LAS AVES COMERCIALES

    OpenAIRE

    Carlos López Coello

    2006-01-01

    Este artículo de revisión aborda la importancia de los ácidos fenólicos, flavonoides, taninos y sus compuestos derivados en la nutrición y alimentación de las aves. Los sorgos café presentan altos tenores de taninos, lo cual les proporciona como ventajas la resistencia a pájaros y a algunas plagas, sin embargo, reducen el valor nutricional del grano para las aves. Las informaciones sobre el contenido de estos compuestos es aún incierta, principalmente en la literatura, donde los sorgos café t...

  4. ENFERMEDAD DE NEWCASTLE EN AVES DE TRASPATIO DEL EJE CAFETERO COLOMBIANO

    OpenAIRE

    Marlyn Romero P; William Narvaez S; Jorge Sánchez V

    2009-01-01

    Objetivo. Evaluar la circulación del virus de la enfermedad de Newcastle (ENC) en aves de traspatio de siete municipios del eje cafetero por medio de la técnica ELISA. Materiales y métodos. Fueron encuestados 465 predios para evaluar las normas de bioseguridad de las aves de traspatio de los municipios de Armenia, Circasia, Quimbaya, Montenegro, Filandia, Calarcá y La Tebaida del Departamento del Quindío. Se analizaron 662 muestras de suero para detectar anticuerpos IgG cont...

  5. Seasonal changes in the use of marine food resources by Cinclodes nigrofumosus (furnariidae, aves: carbon isotopes and osmoregulatory physiology Cambios estacionales en el uso de recursos alimenticios marinos en Cinclodes nigrofumosus (furnariidae, aves: isótopos de carbono y fisiología osmoregulatoria

    Directory of Open Access Journals (Sweden)

    PABLO SABAT

    2005-06-01

    Full Text Available Passerines lack functional salt glands and to a large extent avoid feeding on marine invertebrates. An exception is Cinclodes nigrofumosus. Previous studies reported that the contents of its gastrointestinal tract had a lower osmolality than seawater suggesting that birds were supplementing their marine invertebrate diet with terrestrial invertebrates and fresh water at certain periods of the year. We report seasonal changes in the diet of C. nigrofumosus at two contrasting coastal localities in Central Chile and document the potential correlation between weather and feeding habits with osmoregulatory features in this species. We expected that C. nigrofumosus would increase its use of osmotically challenging marine dietary sources when fresh water is available. Animals were collected at El Quisco and Los Vilos from central Chile during the mist cool winter and during the hot and dry summer. Immediatly after capture several physiological and morphological variables were determined at the field. We used stable isotope analysis as a proxy variable to measure the relative contribution of marine and terrestrial sources to the diet of Cinclodes nigrofumosus. Our results support the notion that osmoregulatory factors constraint dietary selection: in both localities birds consumed more marine prey when environmental conditions were less stressing, i.e., when lower environment temperatures, higher humidity and more fresh water was available. Our results also indicate that osmoregulatory physiology does not respond in a similar fashion in both seasons and suggest that osmoregulatory physiology of birds is affected by environmental variables in a complex fashionLas aves paseriformes no poseen glándula de la sal funcional y en gran medida evitan el consumo de invertebrados marinos. Una excepción es Cinclodes nigrofumosus. Estudios previos han documentado que el contenido del tracto gastrointestinal posee una osmolalidad menor que el agua de mar, lo que

  6. Alien invasive birds.

    Science.gov (United States)

    Brochier, B; Vangeluwe, D; van den Berg, T

    2010-08-01

    A bird species is regarded as alien invasive if it has been introduced, intentionally or accidentally, to a location where it did not previously occur naturally, becomes capable of establishing a breeding population without further intervention by humans, spreads and becomes a pest affecting the environment, the local biodiversity, the economy and/or society, including human health. European Starling (Sturnus vulgaris), Common Myna (Acridotheres tristis) and Red-vented Bulbul (Pycnonotus cafer) have been included on the list of '100 of the World's Worst Invasive Alien Species', a subset of the Global Invasive Species Database. The 'Delivering Alien Invasive Species Inventories for Europe' project has selected Canada Goose (Branta canadensis), Ruddy Duck (Oxyura jamaicensis), Rose-ringed Parakeet (Psittacula krameri) and Sacred Ibis (Threskiornis aethiopicus) as among 100 of the worst invasive species in Europe. For each of these alien bird species, the geographic range (native and introduced range), the introduction pathway, the general impacts and the management methods are presented. PMID:20919578

  7. Biologia reprodutiva e uso de habitat por Cantorchilus Leucotis (Lafresnaye, 1845 (aves, Troglodytidae no Pantanal, Mato Grosso, Brasil

    Directory of Open Access Journals (Sweden)

    Paula Fernanda Albonette de Nóbrega

    2010-01-01

    Full Text Available O conhecimento atual sobre o sucesso reprodutivo e características da história de vida da maioria das espécies de aves neotropicais é deficiente. A qualidade do habitat onde o ninho é construído é um dos fatores que influenciam o sucesso reprodutivo das aves. Este estudo objetivou determinar atributos da história de vida, assim como o padrão de uso de habitat a fim de compreender a dinâmica reprodutiva de Cantorchilus leucotis no Pantanal de Poconé, entre o rio Bento Gomes e Cuiabá, o qual é sujeito a alagamento de janeiro à abril. Cantorchilus leucotis foi registrado pelos métodos de captura com rede de neblina (1.560 horas, observação por censo auditivo (5.600 horas e procura por ninhos (234 horas, durante os anos de 2001, 2002 e 2006. Foram encontrados 87 ninhos de C. leucotis durante as estações reprodutivas dos anos pesquisados, destes, 58 foram abandonados na fase de construção, quatro foram destruídos por intempéries climáticas, e apenas 25 ninhos chegaram à fase de postura de ovos. A porcentagem simples de sucesso reprodutivos foi de 12% (n = 25. A predação foi a maior causa de perda de ninhos ativos (76%. Desses ninhos, 94,7% encontrava-se em fase de ovo e 5,2% em fase de filhote. Dos 87 ninhos encontrados, 52 (59.8% foram encontrados no Cambarazal, 26 ninhos (29.8% no Brejo e nove ninhos (10.4% no Landi. O parasitismo de ninho não foi observado. A espécie foi registrada ao longo de todos os anos de pesquisa, o que lhe conferiu o status de residente. O cambarazal, por se tratar de uma floresta úmida, apresentou locais ideais para confecção do ninho e a disponibilidade de alimento requerido pela espécie.The existing knowledge on the reproductive success and characteristics of the life history of most species of Neotropical birds is scarce. The quality of the habitat where the nest is built is one of the factors that may or may not favor the reproductive success of birds. This study aimed to determine life

  8. Migration Helps Spread Bird Flu Worldwide

    Science.gov (United States)

    ... page: https://medlineplus.gov/news/fullstory_161473.html Migration Helps Spread Bird Flu Worldwide Scientists recommend keeping ... birds can spread bird flu worldwide and monitoring migration routes could provide early warning of outbreaks, researchers ...

  9. Migration in birds and fishes

    NARCIS (Netherlands)

    Verwey, J.

    1949-01-01

    Our knowledge concerning the periodical movements in animals called migrations is chiefly based on observations on birds. By and by, however, a number of facts concerning migration in other animal groups have been assembled and it seems worth while to compare them with those known for birds. There i

  10. Laboratory Animal Management: Wild Birds.

    Science.gov (United States)

    National Academy of Sciences - National Research Council, Washington, DC. Inst. of Lab. Animal Resources.

    This is a report on the care and use of wild birds in captivity as research animals. Chapters are presented on procurement and identification, housing, nutrition, health of birds and personnel, reproduction in confinement, and surgical procedures. Also included are addresses of federal, state, and provencial regulatory agencies concerned with wild…

  11. Homology and Potential Cellular and Molecular Mechanisms for the Development of Unique Feather Morphologies in Early Birds

    Directory of Open Access Journals (Sweden)

    David J. Bottjer

    2012-09-01

    Full Text Available At least two lineages of Mesozoic birds are known to have possessed a distinct feather morphotype for which there is no neornithine (modern equivalent. The early stepwise evolution of apparently modern feathers occurred within Maniraptora, basal to the avian transition, with asymmetrical pennaceous feathers suited for flight present in the most basal recognized avian, Archaeopteryx lithographica. The number of extinct primitive feather morphotypes recognized among non-avian dinosaurs continues to increase with new discoveries; some of these resemble feathers present in basal birds. As a result, feathers between phylogenetically widely separated taxa have been described as homologous. Here we examine the extinct feather morphotypes recognized within Aves and compare these structures with those found in non-avian dinosaurs. We conclude that the “rachis dominated” tail feathers of Confuciusornis sanctus and some enantiornithines are not equivalent to the “proximally ribbon-like” pennaceous feathers of the juvenile oviraptorosaur Similicaudipteryx yixianensis. Close morphological analysis of these unusual rectrices in basal birds supports the interpretation that they are modified pennaceous feathers. Because this feather morphotype is not seen in living birds, we build on current understanding of modern feather molecular morphogenesis to suggest a hypothetical molecular developmental model for the formation of the rachis dominated feathers of extinct basal birds.

  12. Restos de aves en los yacimientos prehistóricos vascos. Estudios realizados.

    Directory of Open Access Journals (Sweden)

    Miguel Elorza

    1990-01-01

    Full Text Available En el trabajo se indican los estudios realizados, hasta el momento, de arqueozoología de aves en el País Vasco. Se hace especial referencia a los trabajos más antiguos y se presentan varias avifaunas, algunas inéditas, de forma cualitativa.

  13. Estudio de la fauna de aves de la cueva de Pico Ramos (Muskiz, Bizkaia.

    Directory of Open Access Journals (Sweden)

    P. Castaños

    1995-01-01

    Full Text Available Se estudian los restos de Aves de la cuenca de Pico Ramos. Destaca entre las especies halladas la presencia de Alca Gigante (Pinguinus impennis a cuya extinción y hallazgos holocenos se dedica especial atención. Se ofrecen datos osteométricos y biogeográficos de las restantes especies.

  14. Atlas de aves: Un metodo para documentar distribucion y seguir poblaciones

    Science.gov (United States)

    Robbins, C.S.; Dowell, B.A.; Dawson, D.K.; Alvarez-Lopez, Humberto; Kattan, Gustavo; Murcia, Carolina

    1988-01-01

    Los Atlas de Aves son proyectos nacionales o regionalies para trazar en mapas la distribucion en reproduccion de cada especie de ave. Ese procedimiento se esta usando en Europa, Australia, Nueva Zelanda, Norteamerica, y partes de Africa. El tama?o de los cuadrados varia de medio grado de latitud y Iongitud hasta 5 x 5 km. El trabajo de campo de cada proyecto exige aproxlmadamente cinco a?os, pero los aficionados pueden llevar a cabo la mayor parte del trabajo. Es posible almacenar los resultados en un computador personal. Hay muchos beneficios: (I) se presenta la distribucion corriente de las aves de la nacion, del estado, o de la Iocalidad; (2) se desarrolla nueva informacion especialmente sobre especies raras o en peligro; (3) se descubren areas que tienen una avlfauna sobresaliente o habitats raros y ayuda a su proteccion, (4) se documentan cambios de dlstribucion; (5) se pueden usar para documentar cambios de poblacion, especialmente en los tropicos donde otros metodos son mas dificiles de usar porque hay muchas especies y no hay muchos observadores calificados en la identificacion de sonidos de las aves; (6) son proyectos buenos de investigacion para estudiantes graduados; (7) los turistas y los jefes de excursiones de historia natural pueden contribuir con muchas informaciones

  15. Determinación de la agudeza visual estereoscópica (AVE)

    OpenAIRE

    Camps Sanchis, Vicente Jesús; Fez Saiz, Dolores de; Viqueira Pérez, Valentín; Verdú, Francisco Javier; Coloma Torregrosa, Pilar

    2010-01-01

    Obtención del umbral de estereopsis ηU y la agudeza visual estereoscópica AVE de un sujeto utilizando el método psicofísico de los estímulos constantes. Comparación con la determinación de las mismas variables con el método del ajuste.

  16. Muuseumihoone autorid : minevikuga tuleb silmitsi seista / Tsuyoshi Tane, Lina Ghotmeh, Dan Dorell ; interv. Ave Randviir

    Index Scriptorium Estoniae

    Tane, Tsuyoshi

    2006-01-01

    Eesti Rahva Muuseumi arhitektuurivõistluse võiduprojekti autorid Tsuyoshi Tane, Lina Ghometh ja Dan Dorell omavahelisest koostööst, võistlustööst, vastuseid kriitikale. Teistest premeeritud projektidest. Ave Randviiru kommentaar "Võidutöö teeb ajaloole psühhoanalüüsi"

  17. Comportamento alimentar de aves em Miconia rubiginosa (Melastomataceae) em fragmento de Cerrado, São Paulo

    OpenAIRE

    Marcondes-Machado Luiz Octavio

    2002-01-01

    Birds of 11 species were observed feeding on fruits of Miconia rubiginosa (Bonpl.)DL between February and March 1985 in Itirapina cerrado, State of São Paulo, Brazil. The feeding strategies of birds with regards to fruit use, and the role of the fruits as food resources for the birds in cerrado are analyzed.

  18. Spatial distribution and diversity of bird community in an urban area of Southeast Brazil

    Directory of Open Access Journals (Sweden)

    Marco Antônio Manhães

    2005-03-01

    Full Text Available Since the campus of the Federal University of Juiz de Fora, Minas Gerais State, Brazil, has different landscapes, it turns up to be a useful ecological model to evaluate the influence of habitat heterogeneity on bird communities. Our research goals were to know the local avifauna and compare its composition and bird diversity within the different landscapes. Species were identified in point counts without distance estimation, in four habitats: secondary woodlot, lake and surroundings, scrub/abandoned grazing areas and urban areas. One hundred and twenty-one species were identified, but no difference in diversity among the habitats was found. However, analyses indicated the existence of greater similarities among the sampling points belonging to the same kind of habitat. Results suggests that small and isolated forest fragments in urban areas fail to sustain a greater diversity than the adjacent areas, even though the environment's heterogeneous aspect favours local bird richness.O Campus da Universidade Federal de Juiz de Fora possui diferentes paisagens e pode representar um modelo ecológico útil para avaliar a influência da heterogeneidade de hábitats sobre a diversidade de aves. Os objetivos deste trabalho foram conhecer a avifauna local e comparar a composição e diversidade de aves nas distintas paisagens existentes. As espécies foram identificadas em pontos de contagem, em quatro hábitats: mata secundária, lago e arredores, capoeira/pastagem abandonada e urbanizada/jardinada. Foram identificadas 121 espécies, mas não houve diferença de diversidade entre os hábitats. Entretanto, as análises indicaram a existência de maiores similaridades entre os pontos amostrais pertencentes ao mesmo tipo de hábitat. Os resultados sugerem que pequenos fragmentos de mata fortemente isolados em áreas urbanas não sustentam uma diversidade maior do que as áreas adjacentes mas o aspecto heterogêneo do ambiente pode favorecer a riqueza de aves

  19. Foraging decisions, patch use, and seasonality in egrets (Aves: ciconiiformes)

    Science.gov (United States)

    Erwin, R.M.

    1985-01-01

    Feeding snowy (Egretta thula) and great (Casmerodius albus) egrets were observed during 2 breeding seasons in coastal New Jersey and 2 brief winter periods in northeast Florida (USA). A number of tests based on assumptions of foraging models, predictions from foraging theory, and earlier empirical tests concerning time allocation and movement in foraging patches was made. Few of the expectations based on foraging theory and/or assumptions were supported by the empirical evidence. Snowy egrets fed with greater intensity and efficiency during the breeding season (when young were being fed) than during winter. They also showed some tendency to leave patches when their capture rate declined, and they spent more time foraging in patches when other birds were present nearby. Great egrets showed few of these tendencies, although they did leave patches when their intercapture intervals increased. Satiation differences had some influence on feeding rates in snowy egrets, but only at the end of feeding bouts. Some individuals of both species revisited areas in patches that had recently been exploited, and success rates were usually higher after the 2nd visit. Apparently, for predators of active prey, short-term changes in resource availability ('resource depression') may be more important than resource depletion, a common assumption in most optimal foraging theory models.

  20. Hypopi (Acari: Hypoderatidae) of the wood stork (Aves: Ciconiiformes: Ciconiidae)

    Science.gov (United States)

    Pence, Danny B.; Thomas, N.J.

    1995-01-01

    A new species is described and additional host records are presented for 2 other species of deutonymphs of the family Hypoderatidae from the subcutaneous adipose tissues of the wood stork, Mycteria americana L. Phalacrodectes (Phalacrodectes) mycteria n. sp. appears to share affinities with species from both pelicaniform and ciconiiform hosts, but it most closely resembles P. (P.) punctatissimus (Černý) Pence & Courtney from pelicans in idiosomal chaetotaxy, cutdcular sclerotization, and posteriorly divergent, widely separated genital openings. The new species differs from this and other species of the genus by its small size, the degree of separation of the genital openings with papillae, no secondary sclerotization in the perigenital area or surrounding the genital openings, and the long filiform setae s and w on genu III. There was a mixed infection of Neottialges kutzeri Fain and N. mycteriae Pence in all of 7 wood storks examined from Florida and Georgia; P. (P) mycteria was found in 4 of these hosts. This is the 7th species described as a deutonymph in the genus Phalacrodectes. The apparent close affinity of P. (P.) mycteria with P. (P.) punctatissimus and allied species from pelicaniform versus ciconiiform birds appears to be inconsistent with the established host-parasite relationships based on classical avian taxonomic relationships. However, this apparent affinity may be more reflective of the close relationships between the families of pelicans, ibises and spoonbills, and storks as recently proposed by DNA-DNA hybridization studies.

  1. THE SKULL OF THE PERUVIAN BOOBY SULA VARIEGATA (AVES, SULIDAE

    Directory of Open Access Journals (Sweden)

    MARCELO STUCCHI

    Full Text Available This paper describes the morphology of the skull of the Peruvian booby Sula variegata (Tschudi, 1845, considering its ontogeny, and compared with other species of the family Sulidae and, similarly, with other families of the traditional order Pelecaniformes: Phalacrocoracidae, Anhingidae, Fregatidae, Phaetonthidae and Pelecanidae. In the comparisons could be found characteristics which the Peruvian booby shares with other members of Sulidae, and others that, taken together, distinguish it from other species of the genus Sula. Among the former are: (1 during ontogenetic development, they change the proportions between the rostrum and thebraincase, stretching the first and reducing the height of the second. (2 The skulls have a nasal opening in their early stages of development, which is completely closed with the growth of the bird. The respiratory function moves to a space that is below the pre-orbital fenestra and the jugal, which is protected by ranfoteca. (3 Adult individuals present a trabecular space in the inner part of the upper jaw and frontals that confers resistance to the skull. All these features allow the Sulidae to prevent the rupture or buckling of the skull under the force of the impact of the plunge. In the second case there are: (1 cranial roof slightly vaulted over the orbits; (2 Sagittal crest generally narrow, although wide in some individuals; (3 Short temporal region; (4 Straight proximal rostrum in front of the naso-frontal suture.

  2. Anatomy of a Bird

    Science.gov (United States)

    2007-12-01

    Using ESO's Very Large Telescope, an international team of astronomers [1] has discovered a stunning rare case of a triple merger of galaxies. This system, which astronomers have dubbed 'The Bird' - albeit it also bears resemblance with a cosmic Tinker Bell - is composed of two massive spiral galaxies and a third irregular galaxy. ESO PR Photo 55a/07 ESO PR Photo 55a/07 The Tinker Bell Triplet The galaxy ESO 593-IG 008, or IRAS 19115-2124, was previously merely known as an interacting pair of galaxies at a distance of 650 million light-years. But surprises were revealed by observations made with the NACO instrument attached to ESO's VLT, which peered through the all-pervasive dust clouds, using adaptive optics to resolve the finest details [2]. Underneath the chaotic appearance of the optical Hubble images - retrieved from the Hubble Space Telescope archive - the NACO images show two unmistakable galaxies, one a barred spiral while the other is more irregular. The surprise lay in the clear identification of a third, clearly separate component, an irregular, yet fairly massive galaxy that seems to be forming stars at a frantic rate. "Examples of mergers of three galaxies of roughly similar sizes are rare," says Petri Väisänen, lead author of the paper reporting the results. "Only the near-infrared VLT observations made it possible to identify the triple merger nature of the system in this case." Because of the resemblance of the system to a bird, the object was dubbed as such, with the 'head' being the third component, and the 'heart' and 'body' making the two major galaxy nuclei in-between of tidal tails, the 'wings'. The latter extend more than 100,000 light-years, or the size of our own Milky Way. ESO PR Photo 55b/07 ESO PR Photo 55b/07 Anatomy of a Bird Subsequent optical spectroscopy with the new Southern African Large Telescope, and archive mid-infrared data from the NASA Spitzer space observatory, confirmed the separate nature of the 'head', but also added

  3. Bristol Bay, Alaska Subarea ESI: BIRDS (Bird Polygons)

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — This data set contains sensitive biological resource data for shorebirds, waterfowl, raptors, diving birds, and seabirds in the Bristol Bay Subarea. The Subarea...

  4. Birds of the Mongol Empire

    Directory of Open Access Journals (Sweden)

    Eugene N. Anderson

    2016-09-01

    Full Text Available The Mongol Empire, the largest contiguous empire the world has ever known, had, among other things, a goodly number of falconers, poultry raisers, birdcatchers, cooks, and other experts on various aspects of birding. We have records of this, largely in the Yinshan Zhengyao, the court nutrition manual of the Mongol empire in China (the Yuan Dynasty. It discusses in some detail 22 bird taxa, from swans to chickens. The Huihui Yaofang, a medical encyclopedia, lists ten taxa used medicinally. Marco Polo also made notes on Mongol bird use. There are a few other records. This allows us to draw conclusions about Mongol ornithology, which apparently was sophisticated and detailed.

  5. Diet and prey availability of terrestrial insectivorous birds prone to extinction in amazonian forest fragments

    Directory of Open Access Journals (Sweden)

    Luiz Augusto Macedo Mestre

    2010-12-01

    Full Text Available This study compared niche breath, prey size, and diet variability in two pairs of sympatric species of terrestrial insectivorous birds, each pair containing one species that can persist in small forest fragments and one that does not. The pairs were Myrmeciza ferruginea and Sclerurus rufigularis; and Formicarius colma and F. analis, respectively. The prey availability in forest fragments was also sampled and compared to the availability in continuous forests. Niche breath indices did not differ between pair members, but diet variability differed in the opposite direction from that hypothesized. Although the two bird species most vulnerable to fragmentation fed on larger prey than less vulnerable species, prey availability, including that based on prey size did not differ among fragmented versus continuous forest sites. Thus, diet per se appeared not to be an important cause of extinction-proneness in these species. The simplest explanation proposed, that vulnerability to fragmentation was directly related to territory size, requires testing. However, it was consistent with observations that the bird species feeding on larger prey also need larger territories.Dieta e disponibilidade de presas de aves insetívoras terrestres em fragmentos florestais amazônicos. As aves insetívoras terrestres são um dos grupos mais vulneráveis à fragmentação de florestas tropicais; no entanto algumas espécies desta guilda ainda sobrevivem em fragmentos florestais e em florestas secundárias. Se a sensibilidade destas aves à fragmentação de florestas estivesse associada à dieta, então espécies com a dieta relativamente flexível teriam maior propensão em persistir nos fragmentos florestais. Este estudo comparou sobreposição trófica, amplitude de nicho, tamanho de presas e variabilidade de dieta de dois pares de espécies de aves insetívoras terrestres, onde cada par foi composto por uma espécie que persiste nos fragmentos e outra que n

  6. A comparative overview of the sperm centriolar complex in mammals and birds: Variations on a theme.

    Science.gov (United States)

    Soley, John T

    2016-06-01

    This paper presents an overview of the structure, function and anomalies of the sperm centriolar complex (CC) on a comparative basis between mammals and birds. The information is based on selected references from the literature supplemented by original observations on spermiogenesis and sperm structure in disparate mammalian (cheetah and cane rat) and avian (ostrich, rhea and emu) species. Whereas the basic structure of the CC (a diplosome surrounded by pericentriolar material) is similar in Aves and Mammalia, certain differences are apparent. Centriole reduction does not generally occur in birds, but when present as in oscines, involves the loss of the proximal centriole. In ratites, the distal centriole forms the core of the entire midpiece and incorporates the outer dense fibres in addition to initiating axoneme formation. The elements of the connecting piece are not segmented in birds and less complex in basic design than in mammals. The functions of the various components of the CC appear to be similar in birds and mammals. Despite obvious differences in sperm head shape, the centrosomal anomalies afflicting both vertebrate groups demonstrate structural uniformity across species and display a similar range of defects. Most abnormalities result from defective migration and alignment of the CC relative to the nucleus. The most severe manifestation is that of acephalic sperm, while angled tail attachment, abaxial and multiflagellate sperm reflect additional defective forms. The stump-tail defect is not observed in birds. A comparison of defective sperm formation and centrosomal dysfunction at the molecular level is currently difficult owing to the paucity of relevant information on avian sperm. PMID:26907939

  7. Poisonous birds: A timely review.

    Science.gov (United States)

    Ligabue-Braun, Rodrigo; Carlini, Célia Regina

    2015-06-01

    Until very recently, toxicity was not considered a trait observed in birds, but works published in the last two decades started to shed light on this subject. Poisonous birds are rare (or little studied), and comprise Pitohui and Ifrita birds from Papua New Guinea, the European quail, the Spoor-winged goose, the Hoopees, the North American Ruffed grouse, the Bronzewings, and the Red warbler. A hundred more species are considered unpalatable or malodorous to humans and other animals. The present review intends to present the current understanding of bird toxicity, possibly pointing to an ignored research field. Whenever possible, biochemical characteristics of these poisons and their effects on humans and other animals are discussed, along with historical aspects of poison discovery and evolutionary hypothesis regarding their function.

  8. Barrier Infrared Detector (BIRD) Project

    Data.gov (United States)

    National Aeronautics and Space Administration — JPL will design, fabricate, and fully characterize a 640x512 format HOT-BIRD FPA with increased quantum efficiency and extended spectral coverage. Unlike the small...

  9. North American Breeding Bird Survey

    Data.gov (United States)

    US Fish and Wildlife Service, Department of the Interior — This protocol framework provides guidance for conducting surveys of North American bird populations at multiple stations within two or more regions. The BBS is a...

  10. The role of citizen science in bird conservation: The Christmas Bird Count and Breeding Bird Survey

    Science.gov (United States)

    Sauer, John R.; Butcher, Gregory S.

    2014-01-01

    Many birders in the United States, Canada, and Mexico are critical participants in bird monitoring and conservation activities. This linkage between recreational birders and avian conservation surveys is not new. It was established long before the internet and long before any fast communication facilitated the connection of birders to scientists. It started because a few key individuals realized that birding with a purpose added a new and important dimension to a recreational activity—and birders loved the idea that they were helping to study and conserve the birds they watch. And they still do today.

  11. Birds and bornaviruses.

    Science.gov (United States)

    Payne, Susan L; Delnatte, Pauline; Guo, Jianhua; Heatley, J Jill; Tizard, Ian; Smith, Dale A

    2012-12-01

    In 2008, avian bornaviruses (ABV) were identified as the cause of proventricular dilatation disease (PDD). PDD is a significant condition of captive parrots first identified in the late 1970s. ABV infection has subsequently been shown to be widespread in wild waterfowl across the United States and Canada where the virus infects 10-20% of some populations of ducks, geese and swans. In most cases birds appear to be healthy and unaffected by the presence of the virus; however, infection can also result in severe non-suppurative encephalitis and lesions similar to those seen in parrots with PDD. ABVs are genetically diverse with seven identified genotypes in parrots and one in canaries. A unique goose genotype (ABV-CG) predominates in waterfowl in Canada and the northern United States. ABV appears to be endemic in North American waterfowl, in comparison to what appears to be an emerging disease in parrots. It is not known whether ABV can spread between waterfowl and parrots. The discovery of ABV infection in North American waterfowl suggests that European waterfowl should be evaluated for the presence of ABV, and also as a possible reservoir species for Borna disease virus (BDV), a related neurotropic virus affecting horses and sheep in central Europe. Although investigations have suggested that BDV is likely derived from a wildlife reservoir, for which the shrew and water vole are currently prime candidates, we suggest that the existence of other mammalian and avian reservoirs should not be discounted. PMID:23253163

  12. Trypanosomes of some Fennoscandian birds

    Directory of Open Access Journals (Sweden)

    Gordon F. Bennett

    1994-12-01

    Full Text Available Linear measurements and derived indices of trypanosomes from species of Fennoscandian birds were compared to those reported form Trypanosoma avium, T. everetti, T. ontarioensis and T. paddae. The trypanosomes encountered in the Fennoscandian birds were identified as T. avium from Tengmalm's owl Aegolius funereus and the pied flycatcher Ficedula hypoleuca, T. everetti from the great tit Parus major and collared flycatcher F. albicollis and T. ontarioensis from the collared flycatcher; T. paddae was not seen.

  13. Orientation and navigation in birds

    OpenAIRE

    Bouwman, H.

    1998-01-01

    How birds orientate and navigate over long distances, remains one of the subjects of ornithology eliciting much interest. Birds use combinations of different sources of information to find direction and position. Some of these are the geomagnetic field, celestial bodies, mosaic and gradient maps, sound, smell, idiotetic information and others. Different species use different combinations of sources. This ability is partially inherent and partially learned.

  14. Orientation and navigation in birds

    Directory of Open Access Journals (Sweden)

    H. Bouwman

    1998-07-01

    Full Text Available How birds orientate and navigate over long distances, remains one of the subjects of ornithology eliciting much interest. Birds use combinations of different sources of information to find direction and position. Some of these are the geomagnetic field, celestial bodies, mosaic and gradient maps, sound, smell, idiotetic information and others. Different species use different combinations of sources. This ability is partially inherent and partially learned.

  15. Arbovírus Ilheus em aves silvestres (Sporophila caerulescens e Molothrus bonariensis

    Directory of Open Access Journals (Sweden)

    Pereira Luiz Eloy

    2001-01-01

    Full Text Available OBJETIVO: Relatar o isolamento do vírus Ilheus no Estado de São Paulo e avaliar o seu impacto para a saúde pública. MÉTODOS: O isolamento de vírus foi realizado em camundongos albinos Swiss, a partir de sangue de aves silvestres, capturadas com redes de espera tipo mist net, armadas no nível do solo, no Parque Ecológico do Tietê, São Paulo. A identificação das cepas isoladas foi feita pelos testes de inibição da hemaglutinação, fixação de complemento e neutralização em camundongos. Amostras de plasma de aves e de mamíferos silvestres foram submetidas à pesquisa sorológica para detecção de anticorpos inibidores de hemaglutinação. RESULTADOS: Foram isoladas duas cepas do vírus Ilheus em sangue de aves das espécies Sporophila caerulescens e Molothrus bonariensis e detectados anticorpos em aves das espécies Columbina talpacoti, Geopelia cuneata, Molothrus bonariensis e Sicalis flaveola, em sagüis das espécies Callithrix jacchus e Callithrix penicillata e no quati Nasua nasua. CONCLUSÕES: O isolamento do vírus Ilheus e a detecção de anticorpos específicos em aves residentes, migratórias e de cativeiro, em sagüis e quatis, comprovam a presença desse agente no Parque Ecológico do Tietê. O comportamento migratório de aves silvestres pode determinar a introdução do vírus em outras regiões. Considerando-se a patogenicidade para o homem e a confirmação da circulação desse agente viral em área urbana, freqüentada para atividade de lazer e de educação, o risco de ocorrência de infecção na população humana não pode ser descartado.

  16. Bone histology in extant and fossil penguins (Aves: Sphenisciformes).

    Science.gov (United States)

    Ksepka, Daniel T; Werning, Sarah; Sclafani, Michelle; Boles, Zachary M

    2015-11-01

    Substantial changes in bone histology accompany the secondary adaptation to life in the water. This transition is well documented in several lineages of mammals and non-avian reptiles, but has received relatively little attention in birds. This study presents new observations on the long bone microstructure of penguins, based on histological sections from two extant taxa (Spheniscus and Aptenodytes) and eight fossil specimens belonging to stem lineages (†Palaeospheniscus and several indeterminate Eocene taxa). High bone density in penguins results from compaction of the internal cortical tissues, and thus penguin bones are best considered osteosclerotic rather than pachyostotic. Although the oldest specimens sampled in this study represent stages of penguin evolution that occurred at least 25 million years after the loss of flight, major differences in humeral structure were observed between these Eocene stem taxa and extant taxa. This indicates that the modification of flipper bone microstructure continued long after the initial loss of flight in penguins. It is proposed that two key transitions occurred during the shift from the typical hollow avian humerus to the dense osteosclerotic humerus in penguins. First, a reduction of the medullary cavity occurred due to a decrease in the amount of perimedullary osteoclastic activity. Second, a more solid cortex was achieved by compaction. In extant penguins and †Palaeospheniscus, most of the inner cortex is formed by rapid osteogenesis, resulting an initial latticework of woven-fibered bone. Subsequently, open spaces are filled by slower, centripetal deposition of parallel-fibered bone. Eocene stem penguins formed the initial latticework, but the subsequent round of compaction was less complete, and thus open spaces remained in the adult bone. In contrast to the humerus, hindlimb bones from Eocene stem penguins had smaller medullary cavities and thus higher compactness values compared with extant taxa. Although

  17. Mangrove bird community of Paranaguá Bay - Paraná, Brazil

    Directory of Open Access Journals (Sweden)

    Luiz Augusto Macedo Mestre

    2007-01-01

    Full Text Available This study describes the mangrove bird community of Paranaguá Bay in Paraná - South Brazil. Seasonal surveys were conducted during September 1997 to September 1998 at three sites in Paranaguá Bay. Frequencies and abundances of birds were registered in 200m transects and one hour point counts. A total of 81 bird species were observed in the three sampling sites. Most of the bird species in Paranaguá mangroves are fruits, seeds and arthropods consumers, and predators of flying insects. The most frequent and abundant species were Egretta caerulea, Ceryle torquata, Chloroceryle amazona, Pitangus sulphuratus, Turdus amaurochalinus and Parula pitiayumi. The bird community of these three sites is composed mainly by forest bird species. The mangroves of Paranaguá Bay shelter one of the richest avifauna of Brazilian mangroves. Differences between sampling sites could be related to the proximity of the Paranaguá city and human impacts in the areas. Only in the most disturbed site were observed Passer domesticus and large flocks of Coragyps atratus. This study contributed to the knowledge of mangrove communities, and could be an important basis to fluvial-marine conservation plans in Paraná- Brazil.Este estudo teve como objetivos caracterizar a comunidade de aves de manguezais na baía de Paranaguá e comparar descritivamente a comunidade das três áreas amostradas, diferentes em relação à proximidade de centros urbanos. Foram amostradas sazonalmente, entre setembro de 1997 a setembro 1998, três áreas de manguezais a diferentes distâncias da cidade e do porto de Paranaguá. A avifauna foi registrada em transectos de 200m no interior dos manguezais e em observações de 1 hora em pontos fixos. Foram determinadas freqüência, abundancia relativa e densidade de espécies em cada área. Foram observadas 81 espécies de aves nas três áreas de manguezais. As guildas mais significativas foram das espécies consumidoras de frutos, sementes e artr

  18. Moa's Ark or volant ghosts of Gondwana? Insights from nineteen years of ancient DNA research on the extinct moa (Aves: Dinornithiformes) of New Zealand.

    Science.gov (United States)

    Allentoft, Morten E; Rawlence, Nicolas J

    2012-01-20

    The moa (Aves: Dinornithiformes) of New Zealand represent one of the extinct iconic taxa that define the field of ancient DNA (aDNA), and after almost two decades of genetic scrutiny of bones, feathers, coprolites, mummified tissue, eggshell, and sediments, our knowledge of these prehistoric giants has increased significantly. Thanks to molecular and morphological-based research, the insights that have been obtained into moa phylogenetics, phylogeography, and palaeobiology exceeds that of any other extinct taxon. This review documents the strengths of applying a multidisciplinary approach when studying extinct taxa but also shows that cross-disciplinary controversies still remain at the most fundamental levels, with highly conflicting interpretations derived from aDNA and morphology. Moa species diversity, for example, is still heavily debated, as well as their relationship with other ratites and the mode of radiation. In addition to increasing our knowledge on a lineage of extinct birds, further insights into these aspects can clarify some of the basal splits in avian evolution, and the evolutionary implications of the breakup of the prehistoric supercontinent Gondwana. Did a flightless moa ancestor drift away on proto New Zealand (Moa's Ark) or did a volant ancestor arrive by flight? Here we provide an overview of 19 years of aDNA research on moa, critically assess the attempts and controversies in placing the moa lineage among palaeognath birds, and discuss the factors that facilitated the extensive radiation of moa. Finally, we identify the most obvious gaps in the current knowledge to address the future potential research areas in moa genetics.

  19. Lab-on-a-bird: biophysical monitoring of flying birds.

    Directory of Open Access Journals (Sweden)

    Abdurrahman Gumus

    Full Text Available The metabolism of birds is finely tuned to their activities and environments, and thus research on avian systems can play an important role in understanding organismal responses to environmental changes. At present, however, the physiological monitoring of bird metabolism is limited by the inability to take real-time measurements of key metabolites during flight. In this study, we present an implantable biosensor system that can be used for continuous monitoring of uric acid levels of birds during various activities including flight. The system consists of a needle-type enzymatic biosensor for the amperometric detection of uric acid in interstitial fluids. A lightweight two-electrode potentiostat system drives the biosensor, reads the corresponding output current and wirelessly transfers the data or records to flash memory. We show how the device can be used to monitor, in real time, the effects of short-term flight and rest cycles on the uric acid levels of pigeons. In addition, we demonstrate that our device has the ability to measure uric acid level increase in homing pigeons while they fly freely. Successful application of the sensor in migratory birds could open up a new way of studying birds in flight which would lead to a better understanding of the ecology and biology of avian movements.

  20. Níveis nutricionais de fósforo disponível para aves de corte ISA Label criadas em semiconfinamento Nutritional levels of available phosphorus for ISA Label broilers chickens reared in free-range system

    Directory of Open Access Journals (Sweden)

    Sandra Regina Freitas Pinheiro

    2011-02-01

    Full Text Available Foram realizados três ensaios para determinar os níveis nutricionais de fósforo disponível (Pd para machos e fêmeas da linhagem ISA Label nas fases inicial (1 a 28 dias, crescimento (28 a 56 dias e final (56 a 84 dias criadas em semiconfinamento. Em cada ensaio, 480 aves com idade correspondente à fase de criação foram alojadas em 24 unidades experimentais contendo áreas de abrigo e de pastejo. O delineamento experimental utilizado foi o inteiramente casualizado, em esquema fatorial 4 × 2 (níveis de Pd e sexos com três repetições de 20 aves. Os níveis de fósforo disponível avaliados foram: 0,25; 0,36; 0,47 e 0,58% na fase inicial; 0,18; 0,31; 0,44 e 0,57% na fase de crescimento; e 0,14; 0,27; 0,40 e 0,53% na fase final. Foram avaliados o ganho de peso, consumo de ração, consumo de Pd, conversão alimentar, teores de fósforo, cálcio e cinzas na tíbia e resistência à quebra óssea. De acordo com os resultados, o nível ótimo de Pd na ração na fase inicial, para machos e fêmeas são de 0,39 e 0,49%, que correspondem ao consumo de 3,94 e 3,96 g de Pd/ave, respectivamente. Para a fase de crescimento, recomenda-se 0,35% de Pd na ração para aves de ambos os sexos, que correspondem a consumo de 8,45 e 6,70 g de Pd/ave. Na fase final, recomendam-se os níveis de 0,32 e 0,30% de Pd, que correspondem a consumos de 12 e 9,5 g de Pd/ave para machos e fêmeas, respectivamente.It was performed three trials to determine the nutritional levels of available phosphorus (aP for males and females of the strain ISA Label in the starter (1 to 28 days, growing (28 to 56 days and finisher (56 to 84 days phases, reared in a free-range system. In each trial, 480 birds with age corresponding to rearing phase were housed in 24 experimental units with shelter and pasture areas. It was used a complete random experimental design, in a 4 × 2 factorial scheme (levels of aP and sexes with three replicates of 20 birds. The levels of aP evaluated were

  1. Sensitivity of Coastal Environments and Wildlife to Spilled Oil: Florida Panhandle: BIRDS (Bird Polygons)

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — This data set contains sensitive biological resource data for wading birds, shorebirds, waterfowl, raptors, diving birds, seabirds, passerine birds, and gulls and...

  2. Sensitivity of Coastal Environments and Wildlife to Spilled Oil: Northern California: BIRDS (Bird Polygons)

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — This data set contains sensitive biological resource data for alcids, diving birds, gulls, terns, passerines, pelagic birds, raptors, shorebirds, wading birds, and...

  3. Sensitivity of Coastal Environments and Wildlife to Spilled Oil: Hudson River: BIRDS (Bird Polygons)

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — This data set contains sensitive biological resource data for wading birds, shorebirds, waterfowl, raptors, diving birds, passerine birds, and gulls and terns in...

  4. Sensitivity of Coastal Environments and Wildlife to Spilled Oil: Mississippi: BIRDS (Bird Polygons)

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — This data set contains sensitive biological resource data for wading birds, shorebirds, waterfowl, raptors, diving birds, seabirds, passerine birds, and gulls and...

  5. Sensitivity of Coastal Environments and Wildlife to Spilled Oil: Southern California: BIRDS (Bird Polygons)

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — This data set contains sensitive biological resource data for wading birds, shorebirds, waterfowl, raptors, diving birds, seabirds, passerine birds, and gulls and...

  6. Sensitivity of Coastal Environments and Wildlife to Spilled Oil: New Hampshire: BIRDS (Bird Polygons)

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — This data set contains sensitive biological resource data for wading birds, shorebirds, waterfowl, raptors, diving birds, seabirds, passerine birds, and gulls and...

  7. Sensitivity of Coastal Environments and Wildlife to Spilled Oil: North Carolina: BIRDS (Bird Polygons)

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — This data set contains sensitive biological resource data for wading birds, shorebirds, waterfowl, raptors, diving birds, seabirds, passerine birds, and gulls and...

  8. Sensitivity of Coastal Environments and Wildlife to Spilled Oil: Northwest Arctic, Alaska: BIRDS (Bird Polygons)

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — This data set contains sensitive biological resource data for wading birds, shorebirds, waterfowl, raptors, diving birds, pelagic birds, and gulls/terns in...

  9. Birds as predators in tropical agroforestry systems.

    Science.gov (United States)

    Van Bael, Sunshine A; Philpott, Stacy M; Greenberg, Russell; Bichier, Peter; Barber, Nicholas A; Mooney, Kailen A; Gruner, Daniel S

    2008-04-01

    Insectivorous birds reduce arthropod abundances and their damage to plants in some, but not all, studies where predation by birds has been assessed. The variation in bird effects may be due to characteristics such as plant productivity or quality, habitat complexity, and/or species diversity of predator and prey assemblages. Since agroforestry systems vary in such characteristics, these systems provide a good starting point for understanding when and where we can expect predation by birds to be important. We analyze data from bird exclosure studies in forests and agroforestry systems to ask whether birds consistently reduce their arthropod prey base and whether bird predation differs between forests and agroforestry systems. Further, we focus on agroforestry systems to ask whether the magnitude of bird predation (1) differs between canopy trees and understory plants, (2) differs when migratory birds are present or absent, and (3) correlates with bird abundance and diversity. We found that, across all studies, birds reduce all arthropods, herbivores, carnivores, and plant damage. We observed no difference in the magnitude of bird effects between agroforestry systems and forests despite simplified habitat structure and plant diversity in agroforests. Within agroforestry systems, bird reduction of arthropods was greater in the canopy than the crop layer. Top-down effects of bird predation were especially strong during censuses when migratory birds were present in agroforestry systems. Importantly, the diversity of the predator assemblage correlated with the magnitude of predator effects; where the diversity of birds, especially migratory birds, was greater, birds reduced arthropod densities to a greater extent. We outline potential mechanisms for relationships between bird predator, insect prey, and habitat characteristics, and we suggest future studies using tropical agroforests as a model system to further test these areas of ecological theory.

  10. Do birds sleep in flight?

    Science.gov (United States)

    Rattenborg, Niels C.

    2006-09-01

    The following review examines the evidence for sleep in flying birds. The daily need to sleep in most animals has led to the common belief that birds, such as the common swift ( Apus apus), which spend the night on the wing, sleep in flight. The electroencephalogram (EEG) recordings required to detect sleep in flight have not been performed, however, rendering the evidence for sleep in flight circumstantial. The neurophysiology of sleep and flight suggests that some types of sleep might be compatible with flight. As in mammals, birds exhibit two types of sleep, slow-wave sleep (SWS) and rapid eye-movement (REM) sleep. Whereas, SWS can occur in one or both brain hemispheres at a time, REM sleep only occurs bihemispherically. During unihemispheric SWS, the eye connected to the awake hemisphere remains open, a state that may allow birds to visually navigate during sleep in flight. Bihemispheric SWS may also be possible during flight when constant visual monitoring of the environment is unnecessary. Nevertheless, the reduction in muscle tone that usually accompanies REM sleep makes it unlikely that birds enter this state in flight. Upon landing, birds may need to recover the components of sleep that are incompatible with flight. Periods of undisturbed postflight recovery sleep may be essential for maintaining adaptive brain function during wakefulness. The recent miniaturization of EEG recording devices now makes it possible to measure brain activity in flight. Determining if and how birds sleep in flight will contribute to our understanding of a largely unexplored aspect of avian behavior and may also provide insight into the function of sleep.

  11. Acuaria paraguayensis n. sp. from Sirystes sibilator (Aves: Tyrannidae) in Paraguay and a redescription of A. mamillaris (Molin, 1860) from Cyanocorax cayanus (Corvidae) in Brazil, with a key to the species of Acuaria Bremser, 1811 (Nematoda: Acuariidae) in the New World.

    Science.gov (United States)

    Mutafchiev, Yasen; Mariaux, Jean; Georgiev, Boyko B

    2012-01-01

    Acuaria paraguayensis n. sp. is described on the basis of specimens from Sirystes sibilator (Vieillot) (Aves: Passeriformes, Tyrannidae) in Paraguay. In addition, A. mamillaris (Molin, 1860) from Cyanocorax cayanus (L.) (Corvidae) in Brazil is redescribed on the basis of its type-series from the collection of the Naturhistorisches Museum, Vienna. A review of the species of Acuaria Bremser, 1811 in the New World is presented. Currently, 16 species belong to this genus, which are mostly parasitic in passeriform birds (one record in piciform birds). An identification key to the species of Acuaria occurring in the New World is presented. Acuaria multispinosa (Vigueras, 1938) originally described from Botaurus lentiginosus (Rackett) (Ardeidae) in Cuba, also known from various herons (Ciconiiformes, Ardeidae) in southern states of the USA, does not correspond to the generic diagnosis of Acuaria and is considered a species incertae sedis. Acuaria gracilis var. sturni Boyd, 1951 is elevated to full species rank as Acuaria sturni Boyd, 1951.

  12. Mehed kasvatavad lapsi / Evar Post ; kommenteerivad Ave Kalk, Heda Kala, Anneli Võsaste, Mare Vassiljev, Kimmo Laande

    Index Scriptorium Estoniae

    Post, Evar, 1967-

    2007-01-01

    Meesõpetajatest lasteaias. Räägivad Kadrina Sipsiku lasteaia viieaastaste laste õpetaja Raido Parve ja Võru lasteaia Punamütsike 3-4 aastaste laste õpetaja Aivar Koger. Kommenteerivad Punamütsikese lasteaia juhataja Ave Kalk, haridusministeeriumi alushariduse spetsialist Heda Kala, Tartu maavalitsuse hariduse- ja kultuuriosakonna juhataja Anneli Võsaste, TLÜ Rakvere kolledži õppealajuhataja Mare Vassiljev ning TLÜ Rakvere kolledži alushariduse pedagoogi eriala cum laude lõpetanud Kimmo Laande

  13. Aspectos Epidemiológicos de la Enfermedad de Newcastle en Aves Silvestres de Vida Libre

    Directory of Open Access Journals (Sweden)

    Laura Vargas-Castillo

    2014-12-01

    Full Text Available El virus de la enfermedad de Newcastle (NDV pertenece al género Avulavirus, serotipo paramixovirus aviar tipo 1, de la familia Paramyxoviridae. Es altamente contagiosa ya que se ha demostrado que es capaz de infectar a por lo menos 241 especies, de 27 de los 50 órdenes de aves en el mundo; su patogenicidad está dada por el huésped y el tipo de cepa que presente el animal; se manifiesta con signos clínicos relacionados con el sistema respiratorio, digestivo o nervioso en relación al tipo de cepa. En el humano puede causar conjuntivitis leve y limitada. Esta enfermedad se trasmite por contacto directo con aves enfermas o portadoras, al igual que por contacto con ambientes contaminados. Los estudios relacionados con la presencia del virus de la enfermedad de Newcastle en aves silvestres han sido importantes debido a las implicaciones del virus dentro de la industria avícola ya que genera consecuencias socioeconómicas y sanitarias graves e incide en el comercio internacional de animales.

  14. Birds and polycyclic aromatic hydrocarbons

    Science.gov (United States)

    Albers, P.H.

    2006-01-01

    Polycyclic aromatic hydrocarbons (PAH) are present throughout the global environment and are produced naturally and by activities of humans. Effects of PAH on birds have been determined by studies employing egg injection, egg immersion, egg shell application, single and multiple oral doses, subcutaneous injection, and chemical analysis of field-collected eggs and tissue. The four-to six-ring aromatic compounds are the most toxic to embryos, young birds, and adult birds. For embryos, effects include death, developmental abnormalities, and a variety of cellular and biochemical responses. For adult and young birds, effects include reduced egg production and hatching, increased clutch or brood abandonment, reduced growth, increased organweights, and a variety of biochemical responses. Trophic level accumulation is unlikely. Environmental exposure to PAH in areas of high human population or habitats affected by recent petroleum spills might be sufficient to adversely affect reproduction. Evidence of long-term effects of elevated concentrations of environmental PAH on bird populations is very limited and the mechanisms of effect are unclear.

  15. Tamaño relativo encefálico e índices cerebrales en Vanellus c. chilensis (Aves: Charadriidae Relative encephalic size and cerebral indices of Vanellus c. chilensis (Aves: Charadriidae

    Directory of Open Access Journals (Sweden)

    ESTELA PISTONE

    2002-09-01

    Full Text Available Se analizó la composición cuantitativa encefálica y se estimaron índices cerebrales en Vanellus c. chilensis (tero o queltehue. Se estimó el volumen porcentual e índices cerebrales del encéfalo total y de siete de sus componentes, como así también los núcleos de relevo de las vías trigeminal, visual y acústica. El telencéfalo es el componente de mayor volumen relativo, siendo el neoestriado la estructura telencefálica de tamaño superior. El desarrollo del estriado propiamente dicho, tecto óptico y los núcleos de relevo de las vías visual y trigeminal concuerdan con la dieta carnívora de Vanellus c. chilensis. El tamaño relativo del Wulst y de los núcleos de la vía acústica se asocia a las complicadas tácticas que utiliza esta especie en la defensa del nido. Los índices cerebrales de las estructuras encefálicas analizadas indican que Vanellus c. chilensis es un ave progresivaThe quantitative encephalic composition and cerebral indices of Vanellus c. chilensis (southern lapwing were analyzed. The percentual volumes and cerebral indices for the whole encephalon and for seven components were calculated as well as relevous nuclei of the trigeminal, visual and acoustic pathways. The component of greater relative volume is the telencephalon. The neostriatum is the most developed encephalic structure. Developing of bulbus olfactorius, striatum, tectum opticum and relevous nuclei of visual and trigeminal pathways are according with the carnivorous diet of Vanellus c. chilensis. The relative size of Wulst and relevous nuclei of acoustic pathway appears associated with the complex tactics used by this species in the defense of nest. Cerebral indices of all the analyzed structures suggest that Vanellus c. chilensis is a progresive bird

  16. RICHNESS, CELLULOLYTIC ACTIVITY, AND FUNGICIDE SUSCEPTIBILITY OF FUNGI FROM A BIRD BIOLOGICAL COLLECTION

    Directory of Open Access Journals (Sweden)

    Henry Arenas-Castro

    2015-11-01

    Full Text Available ABSTRACTBiological collections in natural history museums serve important purposes to the scientific community and the general public, however, their value and utility might be diminished by biodeterioration. We studied a biological collection that represents more than sixty years of avifauna sampling of Colombia, the country with the highest bird diversity. An initial inspection of the collection showed that the general appearance of some specimens was compromised by mold-like growth on their surfaces. We aimed at (i identifying the taxonomic affiliation of these fungi, (ii evaluating their cellulolytic activity, and (iii probing chemical agents that could be utilized to control their growth. The most common fungi genera were Aspergillus, Penicillium, Chaetomium, and Trichophyton, most of which can degrade cellulose. Zinc chloride and salicylic acid showed to be effective fungicides. Based on this, we propose some actions to control the fungi-pest in this biological collection of birds.RESUMENLas colecciones biológicas en los museos de historia natural juegan un papel importante tanto para la comunidad científica como para el público en general. Sin embargo, su valor y utilidad pueden verse afectados por la biodeterioración de sus ejemplares. Se estudio una colección biológica de aves que representa más de sesenta años de esfuerzo de muestreo de la avifauna del país más rico en aves. Una inspección inicial mostró que la apariencia general de algunos de los especímenes de la colección se encontraba afectada por hongos. Los objetivos de este estudio fueron (i identificar la afiliación taxonómica de los hongos, (ii determinar la actividad celulolítica y (iii probar agentes químicos que puedan ser utilizados para controlar su desarrollo. Los géneros de hongos más comunes fueron Aspergillus, Penicillium, Chaetomium y Trichophyton, de los cuales la mayoría presentan la capacidad de degradar celulosa. Adicionalmente, el cloruro de

  17. Invasive alien birds in Denmark

    DEFF Research Database (Denmark)

    Nyegaard, Timme; Heldbjerg, Henning; Fox, Anthony David

    Avian Introduced Alien Species (IAS) constitute a threat to the integrity of native biodiversity, the economy and human health, so here we briefly review some of the problems posed by such species around the world in relation to bird species in Denmark. A new European Union Regulation on Invasive...... Alien Species implemented in January 2015 requires a framework for actions to combat alien species, which requires Member States to prevent the spread of alien species, provide early warning and rapid responses to their presence and management of established alien species where they occur. We show...... the importance of mechanisms such as DOFs (Danish Ornithological Society, BirdLife Denmark) Atlas project, Common Bird Monitoring (breeding and wintering species) and DOFbasen to contribute data on the current geographical and numerical distribution of the few serious alien avian species already present...

  18. Invasive alien birds in Denmark

    DEFF Research Database (Denmark)

    Fox, Anthony David; Heldbjerg, Henning; Nyegaard, Timme

    2015-01-01

    Avian Introduced Alien Species (IAS) constitute a threat to the integrity of native biodiversity, the economy and human health, so here we briefly review some of the problems posed by such species around the world in relation to such bird species in Denmark. A new European Union Regulation...... on Invasive Alien Species implemented in January 2015 establishes a framework for actions to combat alien species, which requires Member States to prevent the spread of alien species, provide early warning and rapid responses to their presence and management of established alien species where they occur. We...... show the importance of mechanisms such as DOF’s (Dansk Ornitologisk Forening, BirdLife Denmark) Atlas project, Common Bird Census (breeding and wintering species) and DOFbasen to contribute data on the current geographical and numerical distribution of the few serious alien avian species already...

  19. Angels, Demons, Birds and Dinosaurs

    DEFF Research Database (Denmark)

    Ries, Christopher Jacob

    2010-01-01

    of birds, setting the international agenda for research in bird evolution for the next 40 years. In Denmark, however, Heilmann's highly original work was generally ignored or even ridiculed by zoologists. This article demonstrates how Heilmann's artistic abilities played an important role in securing him......In the years between 1912 and 1916, the Danish artist and graphic designer Gerhard Heilmann published a series of articles in the journal of the Danish Ornithological Society. From the outset, Heilmann's work aroused international interest, and in 1926 it was published in English as The origin...... international renown as a palaeontologist, while at the same time his lack of scientific credentials led to his complete isolation from the Danish zoological establishment. And it suggests that Heilmann's unyielding efforts to solve the riddle of bird evolution in the borderland between art and science...

  20. Exigências de lisina digestível para aves de corte da linhagem ISA Label criadas em semiconfinamento Digestible lysine requirements for ISA Label broilers reared in free-range system

    Directory of Open Access Journals (Sweden)

    D.C. Nagib Nascimento

    2009-10-01

    Full Text Available Foram realizados três experimentos para determinar as exigências de lisina digestível para aves da linhagem ISA Label, de ambos os sexos, criadas em semiconfinamento durante as fases: inicial (1 a 28 dias, de crescimento (28 a 56 dias e final (56 a 84 dias. Em cada experimento, foram utilizadas 480 aves, alojadas em 24 piquetes, cada um contendo abrigo coberto de 3,13m² e área de pastejo de 72,87m². O delineamento experimental utilizado foi o inteiramente ao acaso, em esquema fatorial 4x2 (níveis de lisina e sexo com três repetições de 20 aves cada. Os níveis de lisina digestível avaliados foram: 0,850; 0,970; 1,090 e 1,210% na fase inicial; 0,750; 0,870; 0,990 e 1,110% na fase de crescimento e 0,640; 0,760; 0,880 e 1,000% na fase final. Foram mensuradas as variáveis de desempenho, característica de carcaça, deposição de proteína e gordura corporal, peso e teor de proteína das penas. Com base nos resultados de desempenho, recomendam-se 1, 041; 1,006 e 0,760% de lisina digestível em rações para aves ISA Label nas fases inicial, de crescimento e final, respectivamente.Three assays were carried out to determine digestible lysine requirement for ISA Label, both genders, in free-range system on starter (1 to 28 days, growing (28 to 56 days e finishing phases (56 to 84 days. A total of 480 birds were distributed into 24 pens, each one composed by shelter (3.13m² and pasture (72.87m². The experimental design was a completely randomized in factorial arrangement (four levels of lysine and two genders with three replicates of 20 birds. The digestible lysine levels were 0.85, 0.97, 1.09, and 1.21% for starter; 0.75, 0.87, 0.99, and 1.11% for growing; and 0.64, 0.76, 0.88, and 1.00% for finishing phases. The analyzed parameters were performance, carcass yield, protein and fat deposition, weight, and protein in the feathers. Based on bird performance the estimated digestible lysine level, was 1.041, 1.006, and 0.760% for the starter

  1. MANNAN OLIGOSACCHARIDES AND ENZYMES IN CORN AND SOYBEAN MEAL BASED-DIETS FOR BROILERS MANANOLIGOSSACARÍDEOS E ENZIMAS EM DIETAS À BASE DE MILHO E FARELO DE SOJA PARA AVES

    Directory of Open Access Journals (Sweden)

    Vera Maria Barbosa de Moraes

    2007-09-01

    Full Text Available

    Mannan oligosaccharides, as an alternative to an-tibiotics, show promising results related to bird perfor-mance, immunity stimulus and improvement of intestinal mucosa. Enzyme inclusion in diets containing mannan oli-gosaccharides could improve these results. Poultry diets consist of corn and soybean meal, and approximately 30% of the phosphorus (P in these ingredients is bound to phytic acid. Phytase is capable of release not only the P but also other nutrients that can be better used by the birds while corn is relatively free of viscosous nonstarch poly-saccharides (NSP, soybean has about 20% of NSP, whose digestibility is almost null. NSP`s insoluble component of corn and soybean encapsulate nutrients and are responsive to exogenous enzymes. Negative environmental and nutri-tional consequences of dietary phytic acid are reduced by phytase inclusion in monogastric diets. Additionally, the enzymatic complex supplementation improves the nutri-tional value of feedstuffs through higher digestibility in birds. Finally, the use of exogenous enzymes allows re-duction in feed costs.

    KEY-WORDS: Animal nutrition, enzymatic supplementation, prebiotic.

    Os mananoligossacarídeos, como alternativa aos antibióticos, têm apresentado resultados promissores no que se refere tanto ao desempenho das aves quanto ao estímulo da imunidade e à melhora da mucosa intestinal. A inclusão de enzimas nas dietas contendo mananoligossacarídeos poderia melhorar ainda mais esses resultados. As dietas para aves são compostas de milho e farelo de soja, principalmente, e cerca de 30% do fósforo (P desses in-gredientes estão ligados ao ácido fítico. A fitase libera não só o P, mas também outros nutrientes para que sejam me-lhor utilizados pelas aves. O milho é relativamente isento de polissacarídeos não-amiláceos (PNAs viscosos e a soja apresenta cerca de 20% de PNAs, com digestibilidade praticamente nula. Os componentes insolúveis dos PNAs do

  2. Chemical compass for bird navigation

    DEFF Research Database (Denmark)

    Solov'yov, Ilia; Hore, Peter J.; Ritz, Thorsten;

    2014-01-01

    Migratory birds travel spectacular distances each year, navigating and orienting by a variety of means, most of which are poorly understood. Among them is a remarkable ability to perceive the intensity and direction of the Earth's magnetic field. Biologically credible mechanisms for the detection...... increased interest following the proposal in 2000 that free radical chemistry could occur in the bird's retina initiated by photoexcitation of cryptochrome, a specialized photoreceptor protein. In the present paper we review the important physical and chemical constraints on a possible radical...

  3. Anticuerpos séricos contra la enfermedad de Newcastle e Influenza Aviar en aves rapaces de Chile.

    Directory of Open Access Journals (Sweden)

    Daniel González-Acuña

    2012-12-01

    Full Text Available Objetivo. Detectar la presencia de anticuerpos séricos sanguíneos contra los virus de la Enfermedad de Newcastle (ENC e Influenza aviar (IA, para comprender la contribución de las aves silvestres en la transmisión de estos virus en Chile. Materiales y métodos. Se analizaron 63 aves pertenecientes a los órdenes Falconiformes y Strigiformes desde centros de rehabilitación de aves de las zonas central y sur de Chile. Se realizaron las pruebas de inhibición de la hemoaglutinación (IHA para detectar anticuerpos contra el virus ENC e inmunodifusión en gel agar (IDGA y ELISA para IA. Resultados. Se detectaron 14 aves positivas (22.2% para anticuerpos séricos contra el virus de la ENC. En cambio, no se registraron anticuerpos séricos sanguíneos para el virus de la IA. Conclusiones. La presencia de aves rapaces positivas en los centros de rescate a los anticuerpos séricos contra el virus de la ENC puede ser explicada por el consumo de carne de pollos que han sido vacunados contra ENC o consumo de aves que han adquirido directamente el virus vacunal a través de los distintos procedimientos de administración (aerosoles, bebederos de la vacuna o por el ingreso a los centros de rescate de aves rapaces migratorias, las que podrían facilitar la diseminación de la infección desde los países de origen, hecho que debe ser investigado.

  4. Estacionalidad de los atropellos de aves en el centro de España : número y edad de los individuos y riqueza y diversidad de especies

    OpenAIRE

    Frías, Óscar

    1999-01-01

    Con base a la información recogida sobre un total de 1.237 kilómetros recorridos en una carretera que atraviesa un medio seudoestepario del centro de España se analiza la variación estacional de la abundancia, riqueza y diversidad de aves atropelladas. En total se encontraron 590 aves de 53 especies. El número máximo de aves atropelladas por kilómetro recorrido se encontró durante la época de cría. Este hecho parece deberse a la mayor inexperiencia de las aves jóvenes (que fueron atropelladas...

  5. Birds observed at Shemya Island, Aleutian Islands

    Data.gov (United States)

    US Fish and Wildlife Service, Department of the Interior — This report covers Shemya Island bird surveys. The reports outline migrant bird activity during August 31 to October 3, 1977. The purpose of the study was to survey...

  6. Effects of human disturbance on a burrow nesting seabird Efectos de la presencia de humanos en aves marinas que anidan en madrigueras

    Directory of Open Access Journals (Sweden)

    Yuri V. Albores-Barajas

    2011-12-01

    Full Text Available During 2004, we followed 72 natural burrows to determine the effects of disturbance on breeding success of Cassin's auklets (Ptychoramphus aleuticus. We used distance from a human settlement or path in the analysis of disturbance. Birds whose burrows were closer to the path or the village had a higher rate of nest abandonment and lower breeding success compared to birds nesting further away from the path or the village. Also, older and more experienced individuals represented a larger proportion of the breeding population on less disturbed areas than on highly disturbed ones, probably as older individuals tend to arrive earlier at the breeding grounds, and failed breeders may change burrow sites to move away from disturbance. P. aleuticus are adversely affected by human activity at colonies even if birds are not handled and burrows are not opened, and this has implications for conservation, and planning of ecotourism. On the long term, this can have negative consequences for this species and others with similar characteristics.Durante el 2004 seguimos 72 nidos de la alcuela (Ptychoramphus aleuticus para determinar los efectos de disturbio en el éxito reproductivo. Utilizamos la distancia del nido a áreas asentamientos humanos o al camino como medidas de disturbio. Los nidos que estaban más cerca de los asentamientos o del camino tuvieron una tasa de abandono mayor y un éxito reproductivo menor en comparación con los nidos que estaban más alejados de las fuentes de disturbio. También observamos que en las zonas menos expuestas la proporción de adultos, con mayor experiencia, era más alta, posiblemente porque los individuos con mayor experiencia llegan antes a la zona de anidación. Las alcuelas son afectadas negativamente por la presencia de los humanos y sus actividades, aunque las aves no entren en contacto directo con los humanos. A largo plazo, esto puede acarrear consecuencias graves para esta especie y otras con caracter

  7. Composição química e energia metabolizável de ingredientes para aves Chemical composition and metabolizable energy for poultry feeds

    Directory of Open Access Journals (Sweden)

    PAULO ANTONIO RABENSCHLAG DE BRUM

    2000-05-01

    Full Text Available O objetivo do trabalho foi determinar as composições químicas e energia metabolizável aparente corrigida pelo nitrogênio (EMAn de 11 amostras de ingredientes para rações de aves, visando melhorar a qualidade das rações. A EMAn foi determinada em dois ensaios biológicos com pintos de corte dos 15 aos 23 dias de idade, em baterias metálicas, pelo método de coleta total de excretas. O delineamento experimental foi em blocos casualizados, com sete tratamentos no primeiro e seis no segundo ensaio, e oito repetições de dez aves (cinco machos e cinco fêmeas cada. As rações-teste foram compostas de 60% de uma dieta-referência (DR contendo 22% de PB e 3.100 kcal kg-1 de EM e 40% do ingrediente a ser estudado. O período experimental foi de quatro dias de adaptação e cinco de coleta de excretas. Os valores da composição química e de EMAn determinados neste estudo são, em grande parte, diferentes dos da literatura nacional e estrangeira. O conhecimento da composição química e da EMAn de ingredientes brasileiros possibilitam formular rações mais precisas.The values of chemical composition and of apparent metabolizable energy corrected for nitrogen excretion (AMEn of 11 ingredients used for feeding poultry were determined. The AMEn was determined through two biological essays with broilers from 15 to 23 days of age, housed in metabolic metal cage decks. The total excreta collection method was used. The experimental design was in totally randomized blocks, with seven and six treatments in essays one and two, respectively. Eight replications of ten birds (five males and five females were used for treatments, in each essay. Experimental diets were composed of 60% of a reference diet with 22% of crude protein and 3,100 kcal kg-1 of metabolizable energy and 40% of the ingredient tested. The experimental period was of four days of adaptation and five days of excreta collection. Values of chemical composition and AMEn determined in this

  8. Depredación de aves marinas nocturnas en islotes de isla Guadalupe, México Predation of nocturnal seabirds on islets of Isla Guadalupe, Mexico

    Directory of Open Access Journals (Sweden)

    Eric Mellink

    2010-08-01

    Full Text Available A principios de junio de 2000, se realizó una prospección biológica de 3 islotes en el extremo sur de isla Guadalupe: islote de Afuera (o islote Zapato, islote de Adentro (o islote Toro e islote Negro, para documentar aves marinas anidantes. Se detectaron despojos de más de 100 paíños de Leach (Oceanodroma leucorhoa, 31 mérgulos de Xantus (Synthliboramphus hypoleuca y un alcuela de Cassin (Ptychoramphus aleuticus depredados. Las evidencias indican como el depredador de los paíños al tecolote llanero (Athene cunicularia, pero debido a su tamaño posiblemente no lo haya sido de los mérgulos, ni de la alcuela. Las características de los restos de los individuos depredados indican que eran de la población de paíños que anidó el invierno inmediato anterior. La información no es suficiente para determinar si dicha depredación representa un problema de conservación de aves marinas pequeñas en los islotes de la isla Guadalupe, pero sí sugiere que se debe estudiar más a fondo.In early June 2000 we surveyed 3 islets at the southern end of Isla Guadalupe, Mexico: Islote de Afuera (or Islote Zapato, Islote de Adentro (or islote Toro, and Islote Negro, to document nesting seabirds. We found vestiges of over 100 Leach's Storm-petrels (Oceanodroma leucorhoa, 31 Xantus Murrelets (Synthliboramphus hypoleuca, and 1 Cassin's Auklet (Ptychoramphus aleuticus that had been depredated. The evidences point to Burrowing Owls (Athene cunicularia as the predator of the storm-petrels, but, because of its size, probably other birds were involved in murrelet and auklet predation. Based on the characteristics of the remains, the depredated Leach Storm-petrels belonged to the population that had nested during the previous winter. The information is not sufficient to determine whether such predation represents a conservation problem for small seabirds on Isla Guadalupe, but suggest that the issue should be studied further.

  9. Ecological Sustainability of Birds in Boreal Forests

    OpenAIRE

    Lisa Venier; Mikko Mönkkönen; Robert Howe; Pekka Helle; JoAnn Hanowski; Gerald Niemi; Daniel Welsh

    1998-01-01

    We review characteristics of birds in boreal forests in the context of their ecological sustainability under both natural and anthropogenic disturbances. We identify the underlying ecological factors associated with boreal bird populations and their variability, review the interactions between boreal bird populations and disturbance, and describe some tools on how boreal bird populations may be conserved in the future. The boreal system has historically been an area with extensive disturbance...

  10. Birds and Bird Habitat: What Are the Risks from Industrial Wind Turbine Exposure?

    Science.gov (United States)

    Sprague, Terry; Harrington, M. Elizabeth; Krogh, Carmen M. E.

    2011-01-01

    Bird kill rate and disruption of habitat has been reported when industrial wind turbines are introduced into migratory bird paths or other environments. While the literature could be more complete regarding the documentation of negative effects on birds and bird habitats during the planning, construction, and operation of wind power projects,…

  11. Physiological adaptation in desert birds

    NARCIS (Netherlands)

    Williams, JB; Tieleman, BI; Williams, Joseph B.

    2005-01-01

    We call into question the idea that birds have not evolved unique physiological adaptations to desert environments. The rate at which desert larks metabolize energy is lower than in mesic species within the same family, and this lower rate of living translates into a lower overall energy requirement

  12. Neoplasms identified in free-flying birds

    Science.gov (United States)

    Siegfried, L.M.

    1983-01-01

    Nine neoplasms were identified in carcasses of free-flying wild birds received at the National Wildlife Health Laboratory; gross and microscopic descriptions are reported herein. The prevalence of neoplasia in captive and free-flying birds is discussed, and lesions in the present cases are compared with those previously described in mammals and birds.

  13. I LIKE LISTENING TO BIRDS SINGING

    Institute of Scientific and Technical Information of China (English)

    刘向勤; 廖明娟

    2002-01-01

    Every early morning, birds' happy singing wakes me up. I get dressed quickly and have a wash and brush up, then watch birds and listen to them singing happily in the trees. The singing of different kinds of birds sounds like a piece of beautiful symphonic music. Birds’singing makes me relaxed and happy and it also recalls me something of the Past.

  14. 14 CFR 35.36 - Bird impact.

    Science.gov (United States)

    2010-01-01

    ... 14 Aeronautics and Space 1 2010-01-01 2010-01-01 false Bird impact. 35.36 Section 35.36... STANDARDS: PROPELLERS Tests and Inspections § 35.36 Bird impact. The applicant must demonstrate, by tests or... 4-pound bird at the critical location(s) and critical flight condition(s) of a typical...

  15. 14 CFR 29.631 - Bird strike.

    Science.gov (United States)

    2010-01-01

    ... 14 Aeronautics and Space 1 2010-01-01 2010-01-01 false Bird strike. 29.631 Section 29.631... STANDARDS: TRANSPORT CATEGORY ROTORCRAFT Design and Construction General § 29.631 Bird strike. The... safe landing (for Category B) after impact with a 2.2-lb (1.0 kg) bird when the velocity of...

  16. The Physics of Bird Flight: An Experiment

    Science.gov (United States)

    Mihail, Michael D.; George, Thomas F.; Feldman, Bernard J.

    2008-01-01

    This article describes an experiment that measures the forces acting on a flying bird during takeoff. The experiment uses a minimum of equipment and only an elementary knowledge of kinematics and Newton's second law. The experiment involves first digitally videotaping a bird during takeoff, analyzing the video to determine the bird's position as a…

  17. Diploposthe laevis (Bloch Jacobi (Eucestoda, Hymenolepididae from Netta peposaca (Vieillot (Aves: Anatidae: first record for the Neotropical Region and a new host Diploposthe laevis (Bloch Jacobi (Eucestoda: Hymenolepididae em Netta peposaca (Vieillot (Aves, Anatidae: primeiro registro para Região Neotropical e novo hospedeiro

    Directory of Open Access Journals (Sweden)

    Eliane F. da Silveira

    2008-03-01

    Full Text Available One hundred eight rosy-billed pochards, Netta peposaca (Vieillot, 1816, collected in Brazil and Argentina were examined for endoparasites. Collection sites included the municipalities of Santa Vitória do Palmar and Jaguarão, Rio Grande do Sul State, Brazil (wintering site and Alvear, Corrientes Province, northern Argentina (nesting site. Birds were frozen in dry ice after collection. During necropsy they were categorized according to sex and maturation, either adult or juvenile. The cestode Diploposthe laevis (Bloch Jacobi, 1896 was found (prevalence 68.5%, mean infection was 2. The mean prevalence of D. laevis in Alvear (25.9% was higher than found in Jaguarão and Santa Vitória do Palmar, Rio Grande do Sul (19%, and could be related to the nesting site and to the period when the birds may ingest a higher amount of food. This is the first record of a species of the genus Diploposthe in anatideans from South America, and the first record of the species in N. peposaca. Details of the cirrus pouch and vagina were described based on histological sections.Com o objetivo de conhecer a helmintofauna do marrecão, Netta peposaca (Vieillot, 1816, na América do Sul, 108 aves foram amostradas. Os pontos de captura foram os municípios de Santa Vitória do Palmar e Jaguarão, no Estado do Rio Grande do Sul, sul do Brasil (pólo de invernia, e em Alvear, Província de Corrientes, região norte da Argentina (pólo de nidificação, entre 2002 e 2004. As aves foram congeladas em gelo seco logo após o abate. Durante o procedimento de necropsia tiveram o sexo identificado, e foram classificadas de acordo com estado de maturação sexual, em juvenil e adulto. O cestóide Diploposthe laevis (Bloch Jacobi, 1896 foi encontrado com prevalência média de 68,5% e intensidade média de infecção de dois espécimes por hospedeiro. A prevalência média de D. laevis em Alvear (25,9% foi maior do que a encontrada em Jaguarão e Santa Vitória do Palmar, Rio Grande

  18. Abundance of two Dendrocincla woodcreepers (aves: Dendrocolaptidae in relation to forest structure in Central Amazonia O uso do habitat por duas espécies de arapaçus Dendrocincla (aves: Dendrocolaptidae em relação a estrutura da floresta na Amazônia Central

    Directory of Open Access Journals (Sweden)

    Renato Cintra

    2006-01-01

    Full Text Available Few studies have been conducted to verify how the structure of the forest affects the occurence and abundance of neotropical birds. Our research was undertaken between January 2002 and July 2004 at the Reserva Ducke, near Manaus (02º55',03º01'S; 59º53',59º59'W in central Amazonia, to verify how the forest structure affects the occurrence and abundance of two bird species: the Plain-brown Woodcreeper Dendrocincla fuliginosa and the White-chinned Woodcreeper Dendrocincla merula. Bird species occurrence was recorded using lines of 20 mist-nets (one sample unit, along 51 1-km transects distributed along 9 pararel 8 km trails covering an area of 6400 ha. Along these transects, we placed 50 x 50m plots where we recorded forest structure components (tree abundance, canopy openness, leaf litter, standing dead trees, logs, proximity to streams, and altitude. We then related these variables to bird occurence and abundance using multiple logistic and multiple linear regression models, respectively. We found that D. fuliginosa frequently used plateau areas; being more abundant in areas with more trees. On the other hand, D. merula occurred more frequently and was more abundant in areas with low tree abundance. Our results suggest that although both species overlap in the reserve (both were recorded in at least 68% of the sampled sites, they differ in the way they use the forest microhabitats. Therefore, local variation in the forest structure may contribute to the coexistence of congeneric species and may help to maintain local alpha diversity.Em florestas neotropicais, poucos estudos tem sido conduzidos para verificar como a estrutura da floresta afeta o uso desse ambiente por aves. Este estudo foi realizado entre Janeiro de 2002 e Julho de 2004 na Reserva Ducke próximo a Manaus (02º55',03º01'S; 59º53',59º59'W, para verificar como a estrutura da floresta afeta a ocorrência e abundância de duas espécies de aves: o Arapaçu-pardo, Dendrocincla

  19. AVE8134, a novel potent PPARα agonist, improves lipid profile and glucose metabolism in dyslipidemic mice and type 2 diabetic rats

    Institute of Scientific and Technical Information of China (English)

    Hans Ludwig SCH(A)FER; Wolfgang LINZ; Eugen FALK; Maike GLIEN; Heiner GLOMBIK; Mlarcus KORN; Wolfgang WEN-DLER; Andreas W HERLING; Hartmut R(U)TTEN

    2012-01-01

    AVE8134 is a structurally novel potent PPARα agonist.The aim of this study is to investigate the efficacy of AVE8134 on lipid profile and glucose metabolism in dyslipidemic mice and type 2 diabetic rats.Methods:A cell based PPAR Gal4 transactivation assay was constructed for testing the activities of AVE8134 at 3 different PPAR isoforms in vitro.Transgenic human Apo A1 (hApo A1) mice and insulin-resistant ZDF rats were used to evaluate the effects of AVE8134 in vivo.Results:AVE8134 was a full PPARα dominated PPAR agonist (the values of EC5o for human and rodent PPARα receptor were 0.01 and 0.3 μmol/L,respectively).AVE8134 was not active at PPARδ receptor.In female hApo A1 mice,AVE8134 (1-30 mg·kg-1-d-1,po for 12 d)dose-dependently lowered the plasma triglycerides,and increased the serum HDL-cholesterol,hApo A1 and mouse Apo E levels.In female ZDF rats,AVE8134 (3-30 mg·kg-1-d-1 for 2 weeks) improved insulin-sensitivity index.In pre-diabetic male ZDF rats (at the age of 7 weeks),AVE8134 (10 mg·kg-1-d-1 for 8 weeks) produced an anti-diabetic action comparable to rosiglitazone,without the PPARy mediated adverse effects on body weight and heart weight.In male ZDF rats (at the age of 6 weeks),AVE8134 (20 mg·kg-1-d-1 for 12 weeks) increased mRNA levels of the target genes LPL and PDK4 about 20 fold in the liver,and there was no relevant effect with rosiglitazone.Conclusion:AVE8134 improves lipid profile and glucose metabolism in dyslipidemic mice and type 2 diabetic rats.

  20. Population trends and survival of nesting green sea turtles Chelonia mydas on Aves Island, Venezuela

    Science.gov (United States)

    Garcia-Cruz, Marco A.; Lampo, Margarita; Penaloza, Claudia L.; Kendall, William; Solé, Genaro; Rodriguez-Clark, Kathryn M.

    2015-01-01

    Long-term demographic data are valuable for assessing the effect of anthropogenic impacts on endangered species and evaluating recovery programs. Using a 2-state open robust design model, we analyzed mark-recapture data from green turtles Chelonia mydas sighted between 1979 and 2009 on Aves Island, Venezuela, a rookery heavily impacted by human activities before it was declared a wildlife refuge in 1972. Based on the encounter histories of 7689 nesting females, we estimated the abundance, annual survival, and remigration intervals for this population. Female survival varied from 0.14-0.91, with a mean of 0.79, which is low compared to survival of other populations from the Caribbean (mean = 0.84) and Australia (mean = 0.95), even though we partially corrected for tag loss, which is known to negatively bias survival estimates. This supports prior suggestions that Caribbean populations in general, and the Aves Island population in particular, may be more strongly impacted than populations elsewhere. It is likely that nesters from this rookery are extracted while foraging in remote feeding grounds where hunting still occurs. Despite its relatively low survival, the nesting population at Aves Island increased during the past 30 years from approx. 500 to >1000 nesting females in 2009. Thus, this population, like others in the Caribbean and the Atlantic, seems to be slowly recovering following protective management. Although these findings support the importance of long-term conservation programs aimed at protecting nesting grounds, they also highlight the need to extend management actions to foraging grounds where human activities may still impact green turtle populations.

  1. AVES-IMCO: an adaptive optics visible spectrograph and imager/coronograph for NAOS

    Science.gov (United States)

    Beuzit, Jean-Luc; Lagrange, A.-M.; Mouillet, D.; Chauvin, G.; Stadler, E.; Charton, J.; Lacombe, F.; AVES-IMCO Team

    2001-05-01

    The NAOS adaptive optics system will very soon provide diffraction-limited images on the VLT, down to the visible wavelengths (0.020 arcseconds at 0.83 micron for instance). At the moment, the only instrument dedicated to NAOS is the CONICA spectro-imager, operating in the near-infrared from 1 to 5 microns. We are now proposing to ESO, in collaboration with an Italian group, the development of a visible spectrograph/imager/coronograph, AVES-IMCO (Adaptive Optics Visual Echelle Spectrograph and IMager/COronograph). We present here the general concept of the new instrument as well as its expected performances in the different modes.

  2. Aspectos Epidemiológicos de la Enfermedad de Newcastle en Aves Silvestres de Vida Libre

    OpenAIRE

    Laura Vargas-Castillo; Diego Soler-Tovar

    2014-01-01

    El virus de la enfermedad de Newcastle (NDV) pertenece al género Avulavirus, serotipo paramixovirus aviar tipo 1, de la familia Paramyxoviridae. Es altamente contagiosa ya que se ha demostrado que es capaz de infectar a por lo menos 241 especies, de 27 de los 50 órdenes de aves en el mundo; su patogenicidad está dada por el huésped y el tipo de cepa que presente el animal; se manifiesta con signos clínicos relacionados con el sistema respiratorio, digestivo o nervioso en relación al tipo de c...

  3. Estudio del impacto acústico de la llegada del AVE a Alicante

    OpenAIRE

    Pamies Rodríguez, María Isabel

    2014-01-01

    Este estudio del impacto acústico de la alta velocidad en la ciudad de Alicante sirve para ver cómo ha afectado esta nueva línea a la ciudad, sus repercusiones acústicas. Se pretende evaluar el ruido ferreoviario antes y después de la llegada AVE comparando sus decibelios, sus frecuencias y los si los métodos de barrera son útiles y/o necesario. Para ello se van a emplear instrumentos de medida acústica así como el programa Cadna-A para la elaboración de los mapas de ruido junto con AutoCad....

  4. LOS TANINOS EN LA ALIMENTACIÓN DE LAS AVES COMERCIALES

    Directory of Open Access Journals (Sweden)

    Carlos López Coello

    2006-10-01

    Full Text Available Este artículo de revisión aborda la importancia de los ácidos fenólicos, flavonoides, taninos y sus compuestos derivados en la nutrición y alimentación de las aves. Los sorgos café presentan altos tenores de taninos, lo cual les proporciona como ventajas la resistencia a pájaros y a algunas plagas, sin embargo, reducen el valor nutricional del grano para las aves. Las informaciones sobre el contenido de estos compuestos es aún incierta, principalmente en la literatura, donde los sorgos café tienen sólo estimaciones sobre su contenido de taninos. Estos compuestos afectan también la ganancia de peso y la conversión de alimentos. En el aspecto nutricional, los taninos reducen la disponibilidad de metionina, This review article discusses the effects of phenolic acids, flavonoids, tannins and derivatives in poultry feeding and nutrition. The high tannin sorghum is advantageous for grain producers because of its resistance to birds’ attacks and insects, as compared to low tannin cultivar, but the nutritional value is reduced. The information about the amont of these compounds is really uncertain in scientific literature, and the high tannin sorghum has only estimated values for its tannin percentage. It’s clear that tannins affect weight gain and feed efficiency. The tannin can affect necesitando de la suplementación de este aminoácido, mientras para las proteínas los valores de digestibilidad varian de 45.5 a 66.7% en comparación con 89.9% de los sorgos bajos en taninos. Por otro lado, la presencia de taninos combinada con micotoxinas pueden determinar reducciones significativas del comportamiento de las aves. Se sugiere, por tanto, como forma de disminuir los efectos perjudiciales de estos compuestos en raciones formuladas con sorgo café, la suplementación de metionina, no obstante, la utilización de niveles suplementarios de vitaminas y el uso de calentamiento en horno microondas, no mostró resultados positivos

  5. Parasitos de aves e mamíferos silvestres em cativeiro no estado de Pernambuco

    Directory of Open Access Journals (Sweden)

    Pauline Marie de Souza Santos

    2015-09-01

    Full Text Available Resumo: Os animais silvestres são hospedeiros de uma grande variedade de parasitos que podem interferir em sua conservação ex situ. O objetivo deste estudo foi identificar os parasitos gastrointestinais (PGI e ectoparasitos dos animais do Centro de Triagem de Animais Silvestres (CETAS do Instituto Brasileiro de Meio Ambiente e Recursos Naturais Renováveis (IBAMA de Recife, Pernambuco, além de determinar os aspectos do manejo em cativeiro que possam estar relacionados com os parasitos identificados. Foram coletados ectoparasitos e amostras fecais de 223 aves e mamíferos, as quais foram processadas pelos métodos: microscopia direta, flutuação e sedimentação. Helmintos e/ou protozoários foram detectados em 91 (40,8% amostras fecais, sendo 64 (70,3% de aves e 27 (29,7% de mamíferos. Ovos de Capillaria sp., Ascaridida, Spirurida e oocistos de Eimeria sp. foram detectados nas amostras fecais das aves, enquanto ovos de Trichuris trichiura, Strongyloides sp., Toxocara canis, Ancylostoma sp., Strongylida e oocistos de Coccídios foram encontrados nas amostras fecais de mamíferos. Os ectoparasitos identificados em aves foram Colpocephalum turbinatum, Kurodaia (Kurodaia fulvofasciata, Halipeurus sp., Naubates sp., Saemundssonia sp., Austromenopon sp., Paragoniocotes sp., Brueelia sp., Myrsidea sp. and Pseudolynchia sp., enquanto em mamíferos os ectoparasitos identificados foram Rhipicephalus sanguineus, Amblyomma varium, A. calcaratum, A. nodosum, Ornithodoros talaje e Ctenocephalides felis felis. A. calcaratum e O. talaje são registrados pela primeira vez em Pernambuco e T. tetradactyla é apresentado como novo hospedeiro de O. talaje. Nenhum dos animais estudados apresentou sinais clínicos em decorrência da infecção/infestação parasitária. Parasitos com potencial zoonótico como T. trichiura, Strongyloides sp., T. canis e Ancylostoma sp. foram identificados em primatas não humanos e carnívoros. Precárias condições estruturais

  6. Mapping global diversity patterns for migratory birds.

    Science.gov (United States)

    Somveille, Marius; Manica, Andrea; Butchart, Stuart H M; Rodrigues, Ana S L

    2013-01-01

    Nearly one in five bird species has separate breeding and overwintering distributions, and the regular migrations of these species cause a substantial seasonal redistribution of avian diversity across the world. However, despite its ecological importance, bird migration has been largely ignored in studies of global avian biodiversity, with few studies having addressed it from a macroecological perspective. Here, we analyse a dataset on the global distribution of the world's birds in order to examine global spatial patterns in the diversity of migratory species, including: the seasonal variation in overall species diversity due to migration; the contribution of migratory birds to local bird diversity; and the distribution of narrow-range and threatened migratory birds. Our analyses reveal a striking asymmetry between the Northern and Southern hemispheres, evident in all of the patterns investigated. The highest migratory bird diversity was found in the Northern Hemisphere, with high inter-continental turnover in species composition between breeding and non-breeding seasons, and extensive regions (at high latitudes) where migratory birds constitute the majority of the local avifauna. Threatened migratory birds are concentrated mainly in Central and Southern Asia, whereas narrow-range migratory species are mainly found in Central America, the Himalayas and Patagonia. Overall, global patterns in the diversity of migratory birds indicate that bird migration is mainly a Northern Hemisphere phenomenon. The asymmetry between the Northern and Southern hemispheres could not have easily been predicted from the combined results of regional scale studies, highlighting the importance of a global perspective. PMID:23951037

  7. Urban Bird Feeding: Connecting People with Nature

    Science.gov (United States)

    Gaston, Kevin J.

    2016-01-01

    At a time of unprecedented biodiversity loss, researchers are increasingly recognizing the broad range of benefits provided to humankind by nature. However, as people live more urbanized lifestyles there is a progressive disengagement with the natural world that diminishes these benefits and discourages positive environmental behaviour. The provision of food for garden birds is an increasing global phenomenon, and provides a readily accessible way for people to counter this trend. Yet despite its popularity, quite why people feed birds remains poorly understood. We explore three loosely defined motivations behind bird feeding: that it provides psychological benefits, is due to a concern about bird welfare, and/or is due to a more general orientation towards nature. We quantitatively surveyed households from urban towns in southern England to explore attitudes and actions towards garden bird feeding. Each household scored three Likert statements relating to each of the three motivations. We found that people who fed birds regularly felt more relaxed and connected to nature when they watched garden birds, and perceived that bird feeding is beneficial for bird welfare while investing time in minimising associated risks. Finally, feeding birds may be an expression of a wider orientation towards nature. Overall, we found that the feelings of being relaxed and connected to nature were the strongest drivers. As urban expansion continues both to threaten species conservation and to change peoples’ relationship with the natural world, feeding birds may provide an important tool for engaging people with nature to the benefit of both people and conservation. PMID:27427988

  8. Urban Bird Feeding: Connecting People with Nature.

    Science.gov (United States)

    Cox, Daniel T C; Gaston, Kevin J

    2016-01-01

    At a time of unprecedented biodiversity loss, researchers are increasingly recognizing the broad range of benefits provided to humankind by nature. However, as people live more urbanized lifestyles there is a progressive disengagement with the natural world that diminishes these benefits and discourages positive environmental behaviour. The provision of food for garden birds is an increasing global phenomenon, and provides a readily accessible way for people to counter this trend. Yet despite its popularity, quite why people feed birds remains poorly understood. We explore three loosely defined motivations behind bird feeding: that it provides psychological benefits, is due to a concern about bird welfare, and/or is due to a more general orientation towards nature. We quantitatively surveyed households from urban towns in southern England to explore attitudes and actions towards garden bird feeding. Each household scored three Likert statements relating to each of the three motivations. We found that people who fed birds regularly felt more relaxed and connected to nature when they watched garden birds, and perceived that bird feeding is beneficial for bird welfare while investing time in minimising associated risks. Finally, feeding birds may be an expression of a wider orientation towards nature. Overall, we found that the feelings of being relaxed and connected to nature were the strongest drivers. As urban expansion continues both to threaten species conservation and to change peoples' relationship with the natural world, feeding birds may provide an important tool for engaging people with nature to the benefit of both people and conservation. PMID:27427988

  9. Urban Bird Feeding: Connecting People with Nature.

    Directory of Open Access Journals (Sweden)

    Daniel T C Cox

    Full Text Available At a time of unprecedented biodiversity loss, researchers are increasingly recognizing the broad range of benefits provided to humankind by nature. However, as people live more urbanized lifestyles there is a progressive disengagement with the natural world that diminishes these benefits and discourages positive environmental behaviour. The provision of food for garden birds is an increasing global phenomenon, and provides a readily accessible way for people to counter this trend. Yet despite its popularity, quite why people feed birds remains poorly understood. We explore three loosely defined motivations behind bird feeding: that it provides psychological benefits, is due to a concern about bird welfare, and/or is due to a more general orientation towards nature. We quantitatively surveyed households from urban towns in southern England to explore attitudes and actions towards garden bird feeding. Each household scored three Likert statements relating to each of the three motivations. We found that people who fed birds regularly felt more relaxed and connected to nature when they watched garden birds, and perceived that bird feeding is beneficial for bird welfare while investing time in minimising associated risks. Finally, feeding birds may be an expression of a wider orientation towards nature. Overall, we found that the feelings of being relaxed and connected to nature were the strongest drivers. As urban expansion continues both to threaten species conservation and to change peoples' relationship with the natural world, feeding birds may provide an important tool for engaging people with nature to the benefit of both people and conservation.

  10. Mapping global diversity patterns for migratory birds.

    Directory of Open Access Journals (Sweden)

    Marius Somveille

    Full Text Available Nearly one in five bird species has separate breeding and overwintering distributions, and the regular migrations of these species cause a substantial seasonal redistribution of avian diversity across the world. However, despite its ecological importance, bird migration has been largely ignored in studies of global avian biodiversity, with few studies having addressed it from a macroecological perspective. Here, we analyse a dataset on the global distribution of the world's birds in order to examine global spatial patterns in the diversity of migratory species, including: the seasonal variation in overall species diversity due to migration; the contribution of migratory birds to local bird diversity; and the distribution of narrow-range and threatened migratory birds. Our analyses reveal a striking asymmetry between the Northern and Southern hemispheres, evident in all of the patterns investigated. The highest migratory bird diversity was found in the Northern Hemisphere, with high inter-continental turnover in species composition between breeding and non-breeding seasons, and extensive regions (at high latitudes where migratory birds constitute the majority of the local avifauna. Threatened migratory birds are concentrated mainly in Central and Southern Asia, whereas narrow-range migratory species are mainly found in Central America, the Himalayas and Patagonia. Overall, global patterns in the diversity of migratory birds indicate that bird migration is mainly a Northern Hemisphere phenomenon. The asymmetry between the Northern and Southern hemispheres could not have easily been predicted from the combined results of regional scale studies, highlighting the importance of a global perspective.

  11. El fenómeno de la migración en aves: una mirada desde la Orinoquia

    OpenAIRE

    Ocampo-Peñuela, Natalia

    2010-01-01

    La migración es un fenómeno que ha llamado la atención de investigadores a lo largo del mundo y de la historia de la ciencia. Este proceso biológico ha sido bien estudiado en aves, sin embargo, en Colombia y, especialmente en la región de la Orinoquia, aún queda mucho por conocer sobre estas viajeras. Este artículo presenta el fenómeno de la migración Neotropical en aves; primero se evidencia una recopilación de bibliografía sobre la migración en aves y algunos de sus aspectos más...

  12. Palaearctic-African Bird Migration

    DEFF Research Database (Denmark)

    Iwajomo, Soladoye Babatola

    Bird migration has attracted a lot of interests over past centuries and the methods used for studying this phenomenon has greatly improved in terms of availability, dimension, scale and precision. In spite of the advancements, relatively more is known about the spring migration of trans......-Saharan migrants than autumn migration. Information about the behavior and interactions of migrants during the nonbreeding season in sub-Saharan Africa is also scarce for many species. Furthermore, very little is known about intra-African migration. This thesis summarizes my research on the autumn migration...... of birds from Europe to Africa and opens up the possibility of studying intra-African migration. I have used long-term, standardized autumn ringing data from southeast Sweden to investigate patterns in biometrics, phenology and population trends as inferred from annual trapping totals. In addition, I...

  13. Magnetoreception and baroreception in birds.

    Science.gov (United States)

    O'Neill, Paul

    2013-01-01

    The world as we know it is defined by our senses, although as humans we are equipped to receive and interpret only a fraction of the potential sensory information available. Birds have evolved with different sensory priorities to our own; they can use the Earth's magnetic field as a navigational aid, and are sensitive to slight changes in barometric pressure. These abilities help explain the impressive ability of many bird species to orientate, navigate, and maintain steady altitude during flight over long distances, even in the absence of clear visual cues. This review will explore the history of research into these "avian" senses, highlighting their likely mechanisms of action, underlying neuronal circuitry and evolutionary origins.

  14. Cranial kinesis in palaeognathous birds.

    Science.gov (United States)

    Gussekloo, Sander W S; Bout, Ron G

    2005-09-01

    Cranial kinesis in birds is induced by muscles located caudal on the cranium. These forces are transferred onto the moveable parts of the skull via the Pterygoid-Palatinum Complex (PPC). This bony structure therefore plays an essential role in cranial kinesis. In palaeognathous birds the morphology of the PPC is remarkably different from that of neognathous birds and is thought to be related to the specific type of cranial kinesis in palaeognaths known as central rhynchokinesis. We determined whether clear bending zones as found in neognaths are present in the upper bill of paleognaths, and measured bending forces opposing elevation of the upper bill. A static force model was used to calculate the opening forces that can be produced by some of the palaeognathous species. We found that no clear bending zones are present in the upper bill, and bending is expected to occur over the whole length of the upper bill. Muscle forces are more than sufficient to overcome bending forces and to elevate the upper bill. The resistance against bending by the bony elements alone is very low, which might indicate that bending of bony elements can occur during food handling when muscles are not used to stabilise the upper bill. Model calculations suggest that the large processi basipterygoidei play a role in stabilizing the skull elements, when birds have to resist external opening forces on the upper bill as might occur during tearing leafs from plants. We conclude that the specific morphology of the palaeognathous upper bill and PPC are not designed for active cranial kinesis, but are adapted to resist external forces that might cause unwanted elevation of the upper bill during feeding.

  15. Critical Care of Pet Birds.

    Science.gov (United States)

    Jenkins, Jeffrey Rowe

    2016-05-01

    Successful care of the critical pet bird patient is dependent on preparation and planning and begins with the veterinarian and hospital staff. An understanding of avian physiology and pathophysiology is key. Physical preparation of the hospital or clinic includes proper equipment and understanding of the procedures necessary to provide therapeutic and supportive care to the avian patient. An overview of patient intake and assessment, intensive care environment, and fluid therapy is included. PMID:27131161

  16. Cooperation bibliogram of bird flu

    OpenAIRE

    Stegmann, Johannes; Grohmann, Guenter

    2006-01-01

    The published literature on Bird Flu, now a pandemic animal disease with a possible potential of evolving into a devastating human disease, was analysed primarily with respect of national and international cooperations and networks of authors and countries. The output of research-relevant papers is now around 150 per year and was less than 100 papers per year before 2003. The field is highly cooperative; nearly 90% of the articles have two or more authors. National extramural cooperation is ...

  17. Estructura de las comunidades de aves de las repoblaciones de Pinus radiata del País Vasco.

    OpenAIRE

    Carrascal, L. M.

    1986-01-01

    Se estudia la estructura de las comunidades de aves de las   repoblaciones de Pinus radiata del País Vasco Atlántico, en su   aspecto estacional y sucesional. La comunidad reproductora es menos rica y diversa que la   comunidad invernante. El grupo de aves ligado al estrato   arbustivo y herbáceo es el principal responsable del incremento   de la diversidad y riqueza durante la primavera. Mientras las   especies ligadas al estrato arbustivo y herbáceo incrementan la   ...

  18. Aves ocasionales en la sabana de bogotá y las lagunas de fúquene y de tota

    OpenAIRE

    Borrero, José Ignacio

    2012-01-01

    En números anteriores de esta misma revista publiqué algunas listas preliminares anotando la presencia ocasional de ciertas aves en la Sabana de Bogotá y la Laguna de Fúquene. A continuación hago mención de otras especies que he encontrado en las mismas localidades o también en la Laguna de Tota, Boyacá, a 3015 metros de altitud. Por considerarlo de importancia desde el punto de vista de la distribución geográfica, doy también datos referentes a la presencia de un ave migratoria norteamerican...

  19. Atrial-selective prolongation of refractory period with AVE0118 is due principally to inhibition of sodium channel activity

    OpenAIRE

    Burashnikov, Alexander; Barajas-Martinez, Hector; Hu, Dan; Nof, Eyal; Blazek, Jonathan; Antzelevitch, Charles

    2012-01-01

    AVE0118’s action to prolong effective refractory period (ERP) in atria but not ventricles is thought to be due to its inhibition of IKur. However, in non-remodeled atria, AVE0118 prolongs ERP but not action potential duration (APD70-90), which can be explained with inhibition of sodium, but not potassium channel current. ERP, APD, and the maximum rate of rise of the AP upstroke (Vmax) were measured in canine isolated coronary-perfused right atrial and in superfused ventricular tissue preparat...

  20. Valores energéticos de diferentes alimentos de origem animal para aves Energetic values of different feedstuffs of animal origin for poultry

    Directory of Open Access Journals (Sweden)

    Ricardo Vianna Nunes

    2006-08-01

    Full Text Available Objetivou-se determinar, utilizando-se o método tradicional de coleta total, os valores de energia metabolizável aparente (EMA, aparente corrigida (EMAn, verdadeira (EMV e verdadeira corrigida (EMVn, bem como os coeficientes de metabolizabilidade da EB, de 11 alimentos. Avaliaram-se amostras de três farinhas de vísceras de aves (FVA, três farinhas de penas (FP, duas farinhas de carne e ossos (FCO, duas farinhas de vísceras suínas (FVS e uma farinha de penas e vísceras (FPV de diferentes procedências. Foram utilizados 360 frangos de corte machos Ross com 21 dias de idade, distribuídos em blocos ao acaso em 11 tratamentos e uma ração-referência, com duas repetições por bloco e cinco aves por unidade experimental. Cada alimento substituiu em 20% a ração-referência. As aves receberam ração à vontade por 12 dias, sendo os cinco dias finais destinados à coleta total de excretas. Durante os cinco dias de coleta, 30 aves (distribuídas em seis gaiolas foram mantidas em jejum por 72 horas, sendo as 24 horas iniciais para esvaziamento do trato gastrointestinal e as 48 horas restantes para coleta das excretas, que foram quantificadas e extrapoladas para cinco dias. Os valores de EMA e EMAn, expressos em kcal/kg de MS, foram em média de 1.647 e 1.422 para a FCO, de 2.143 e 1.875 para a FP, de 3.062 e 2.844 para a FVA, de 1.889 e 1.779 para a FVS e de 2.497 a 2.209 para a FPV. Os valores de EMV e EMVn, expressos em kcal/kg de MS, foram em média de 1.753 e 1.462 para a FCO, de 2.269 e 1.452 para a FP, de 3.211 e 2.740 para a FVA, de 2.002 e 1.562 para a FVS e de 2.615 e 1.944 para a FPV.The traditional method of total collection was used to determine the values of apparent metabolizable energy (AME, corrected apparent energy (AMEn, true metabolizable energy (TME and corrected true energy (TMEn of eleven feedstuffs and the respective coefficients of metabolizability of GE. The feedstuffs were as follows: three samples of poultry by

  1. Hormonas y reproduccion en aves: la influencia de factores ambientales y sociales

    Directory of Open Access Journals (Sweden)

    Germán Gutiérrez

    1999-01-01

    Full Text Available En la primera parle de este artículo se presenta una revisión de los mecanismos fisiológicos responsables por la reproducción y los principales efectos de organización y activación que cumplen las hormonas en el desarrollo de la conducta sexual de las aves. Luego se examinan en detalle los principales factores ambientales y sociales que influyen en la iniciación de la temporada reproductiva en aves. El papel del fotoperiodo en la activación de la conducta sexual se discute a la luz del extenso cuerpo de literatura en el área. Otros factores ambientales tales como temperatura, humedad y disponibilidad de recursos también son evaluados. Finalmente, se presentan las investigaciones más relevantes sobre el papel de factores sociales en el desarrollo de la conducta sexual. Sugerencias para investigaciones futuras y problemas en el área, son discutidos a lo largo del artículo y en forma suscinta al final del mismo.

  2. Factors influencing phototaxis in nocturnal migrating birds.

    Science.gov (United States)

    Zhao, Xuebing; Chen, Mingyan; Wu, Zhaolu; Wang, Zijiang

    2014-12-01

    Many migratory bird species fly during the night (nocturnal migrants) and have been shown to display some phototaxis to artificial light. During 2006 to 2009, we investigated phototaxis in nocturnal migrants at Jinshan Yakou in Xinping County (N23°56', E101°30'; 2400 m above sea-level), and at the Niaowang Mountain in Funing County (N23°30', E105°35'; 1400 m above sea-level), both in the Yunnan Province of Southwest China. A total of 5069 birds, representing 129 species, were captured by mist-netting and artificial light. The extent of phototaxis effect on bird migration was examined during all four seasons, three phases of the moon, and under two weather conditions (mist and wind). Data were statistically analyzed to determine the extent to which these factors may impact phototaxis of nocturnal migrants. The results point to phototaxis in birds migrating in the spring and autumn, especially in the autumn. Furthermore, migrating birds were more readily attracted to artificial lights during nights with little moonlight, mist, and a headwind. Regardless of the initial orientation in which birds flew, either following the wind or against the wind, birds would always fly against the wind when flying towards the light. This study broadens our understanding of the nocturnal bird migration, potentially resulting in improved bird ringing practices, increased awareness, and better policies regarding bird protection.

  3. Primer registro de cráneos asignados a Palaeospheniscus (Aves, Spheniscidae procedentes de la Formación Bahía Inglesa (Mioceno Medio-tardío, Chile First record of skulls assigned to Palaeospheniscus (Aves, Spheniscidae from the Bahía Inglesa formation (middle-late Miocene, Chile

    Directory of Open Access Journals (Sweden)

    CAROLINA ACOSTA HOSPITALECHE

    2005-09-01

    Full Text Available Los cráneos de los Spheniscidae (como los de todas las aves, aunque escasos en el registro paleontológico, muestran importantes caracteres a nivel taxonómico. Hasta el momento se conocían solo seis cráneos en todo el mundo: Paraptenodytes antarctica y una nueva especie de Spheniscidae procedentes de las formaciones Gaiman (Mioceno temprano y Puerto Madryn (Mioceno tardío de Argentina, respectivamente; Spheniscus megaramphus y 3S. urbinai de la formación Pisco (Mioceno tardío de Perú, Marplesornis novaezealandiae del Plioceno de Nueva Zelanda y un resto de Sphenicidae cf Spheniscus procedente de la formación Bahía Inglesa (Mioceno medio-tardío. De esta última unidad provienen cinco restos craneanos recientemente descubiertos en la localidad de Caldera (Región de Atacama, Chile, los cuales fueron descritos y asignados preliminarmente a Palaeospheniscus. Estos materiales constituyen el primer registro de cráneos para la especie y significan un importante aporte al conocimiento de la avifauna fósil de Chile y en particular de la formación Bahía InglesaAlthough the skulls of the Spheniscidae are unusual in the paleontologic record, they show important features useful in the systematics of the group, as well as in the rest of the birds. Until now, fossil occurrences were restricted to six skulls: Paraptenodytes antarctica and one new species from the Gaiman formation (Early Miocene and Puerto Madryn formation (late Miocene of Argentina, respectively; Spheniscus megaramphus and S. urbinai from the Pisco Formation (Late Miocene, Perú; Marplesornis novaezealandiae from New Zealand (Pliocene; and Spheniscidae cf. Spheniscus from the Bahía Inglesa Formation (Middle-Late Miocene, Chile. Five new materials have been exhumed from this last unit. These skulls, which come from the Caldera locality (Region of Atacama, Chile, have been preliminarily assigned to Palaeospheniscus (Aves, Spheniscidae, constituting the first skulls described for

  4. Evolutionary ecology of bird-parasite associations

    OpenAIRE

    Tompkins, Daniel Michael.

    1996-01-01

    This thesis investigates the ecological determinants of chewing louse (Insecta: Phthiraptera) host-specificity on four species of Malaysian swiftlets (Aves: Apodidae). Influences of host coloniality on louse ecology were also demonstrated, illustrating the dependence which these permanent ectoparasites have on their hosts. Louse collections were made to look for incidences of host-specific lice occurring on the "wrong" host ("straggling"). Straggling was observed, implying tha...

  5. Optimal moult strategies in migratory birds

    OpenAIRE

    Barta, Zoltán; Mcnamara, John M.; Houston, Alasdair I; Weber, Thomas P.; Hedenström, Anders; Feró, Orsolya

    2007-01-01

    Avian migration, which involves billions of birds flying vast distances, is known to influence all aspects of avian life. Here we investigate how birds fit moult into an annual cycle determined by the need to migrate. Large variation exists in moulting patterns in relation to migration: for instance, moult can occur after breeding in the summer or after arrival in the wintering quarters. Here we use an optimal annual routine model to investigate why this variation exists. The modelled bird's ...

  6. Should Australia Export its Native Birds?

    OpenAIRE

    Kingwell, Ross S.

    1994-01-01

    Commercial export from Australia of native birds, wild or captive bred, is prohibited. This paper firstly describes the current legislation and regulations that restrict the export of native birds and discusses why governments have adopted such a regulatory approach to bird species preservation. Secondly, the paper reviews the debate concerning the export ban, pointing out strengths and weaknesses in arguments and indicating the important role of CITES. Lastly, the paper outlines a new case f...

  7. Green Light for Nocturnally Migrating Birds

    Directory of Open Access Journals (Sweden)

    Marcel R. Wernand

    2008-12-01

    Full Text Available The nighttime sky is increasingly illuminated by artificial light sources. Although this ecological light pollution is damaging ecosystems throughout the world, the topic has received relatively little attention. Many nocturnally migrating birds die or lose a large amount of their energy reserves during migration as a result of encountering artificial light sources. This happens, for instance, in the North Sea, where large numbers of nocturnally migrating birds are attracted to the many offshore platforms. Our aim is to develop bird-friendly artificial lighting that meets human demands for safety but does not attract and disorient birds. Our current working hypothesis is that artificial light interferes with the magnetic compass of the birds, one of several orientation mechanisms and especially important during overcast nights. Laboratory experiments have shown the magnetic compass to be wavelength dependent: migratory birds require light from the blue-green part of the spectrum for magnetic compass orientation, whereas red light (visible long-wavelength disrupts magnetic orientation. We designed a field study to test if and how changing light color influenced migrating birds under field conditions. We found that nocturnally migrating birds were disoriented and attracted by red and white light (containing visible long-wavelength radiation, whereas they were clearly less disoriented by blue and green light (containing less or no visible long-wavelength radiation. This was especially the case on overcast nights. Our results clearly open perspective for the development of bird-friendly artificial lighting by manipulating wavelength characteristics. Preliminary results with an experimentally developed bird-friendly light source on an offshore platform are promising. What needs to be investigated is the impact of bird-friendly light on other organisms than birds.

  8. The peroxisome proliferator-activated receptor-α(PPAR-α) agonist,AVE8134,attenuates the progression of heart failure and increases survival in rats

    Institute of Scientific and Technical Information of China (English)

    Wolfgang LINZ; Paulus WOHLFART; Manuel BAADER; Kristin BREITSCHOPF; Eugen FALK; Hans-Ludwig SCH(A)FER; Martin GERL; Wemer KRAMER; Hartmut R(U)TTEN

    2009-01-01

    Aim:To investigate the efficacy of the peroxisome proliferator-aotivated receptor-α (PPARα) agonist,AVE8134,in cellular and experimental models of cardiac dysfunction and heart failure.Methods:In Sprague Dawley rats with permanent ligation of the left coronary artery (post-MI),AVE8134 was compared to the PPARy agonist rosiglitazone and in a second study to the ACE inhibitor ramipril.In DOCA-salt sensitive rats,efficacy of AVE8134 on cardiac hypertrophy and fibrosis was investigated.Finally,AVE8134 was administered to old spontaneously hypertensive rats (SHR) at a nonblood pressure lowering dose with survival as endpoint.In cellular models,we studied AVE8134 on hypertrophy in rat cardiomyocytes,nitric oxide signaling in human endothelial cells (HUVEC) and LDL-uptake in human MonoMac-6 cells.Results:In post-MI rats,AVE8134 dose-dependently improved cardiac output,myocardial contractility and relaxation and reduced lung and left ventdcular weight and fibrosis.In contrast,rosiglitazone exacerbated cardiac dysfunction.Treatment at AVE8134 decreased plasma proBNP and arginine and increased plasma citrulline and urinary NOx/creatinine ratio.In DOCA rats,AVE8134 prevented development of high blood pressure,myocardial hypertrophy and cardiac fibrosis,and ameliorated endothelial dysfunction.Compound treatment increased cardiac protein expression and phosphorylation of eNOS.In old SHR,treatment with a low dose of AVE8134 improved cardiac and vascular function and increased life expectancy without lowering blood pressure.AVE8134 reduced phenylephrine-induced hypertrophy in adult rat cardiomyocytes.In HUVEC,Ser-1177-eNOS phosphorylation but not eNOS expression was increased.In monocytes,AVE8134 increased the expression of CD36 and the macrophage scavenger receptor 1,resulting in enhanced uptake of oxidized LDL.Conclusion:The PPARα agonist AVES134 prevents post-MI myocardial hypertrophy,fibrosis and cardiac dysfunction.AVES134 has beneficial effects against hypertension

  9. Effects of Grassland Bird Management on Nongame Bird Community Structure and Productivity

    Data.gov (United States)

    US Fish and Wildlife Service, Department of the Interior — The report includes data on bird/habitat relations, breeding biology, and effects of succession and current management practices on grassland bird communities in...

  10. Aleutian Islands Coastal Resources Inventory and Environmental Sensitivity Maps: BIRDS (Bird Polygons)

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — This data set contains biological resource data for alcids, shorebirds, waterfowl, diving birds, pelagic birds, gulls and terns in the Aleutian Islands, Alaska....

  11. Grassland bird surveys in support of the Michigan Breeding Bird Atlas II: Final report

    Data.gov (United States)

    US Fish and Wildlife Service, Department of the Interior — Grassland birds, as a group, have suffered the most severe population declines of any other North American birds (Herkert 1995, Herkert et al. 1996). Compared to...

  12. Orientation in birds. Olfactory navigation.

    Science.gov (United States)

    Papi, F

    1991-01-01

    Research work on the olfactory navigation of birds, which has only recently attracted attention, has shown that many wild species rely on an osmotactic mechanism to find food sources, even at a considerable distance. The homing pigeon, the only bird to have been thoroughly investigated with respect to olfactory navigation, has been found to rely on local odours for homeward orientation, and to integrate olfactory cues perceived during passive transportation with those picked up at the release site. It is possible to design experiments in which birds are given false olfactory information, and predictions about the effects of this can be made and tested. Pigeons are able to home from unfamiliar sites because they acquire an olfactory map extending beyond the area they have flown over. The olfactory map is built up by associating wind-borne odours with the direction from which they come; this was shown by experiments which aimed to prevent, limit or alter this association. One aim of the research work has been to test whether pigeons flying over unfamiliar areas also rely or can learn to rely on non-olfactory cues, depending on their local availability, and/or on the methods of rearing and training applied to them. Various evaluations have been made of the results; the most recent experiments, however, confirm that pigeons do derive directional information from atmospheric odours. A neurobiological approach is also in progress; its results show that some telencephalic areas are involved in orientation and olfactory navigation. The lack of any knowledge about the distribution and chemical nature of the odorants which allow pigeons to navigate hinders progress in this area of research.

  13. Isótopos estables en el estudio de transferencias de elementos en sistemas ave-suelo-planta.

    OpenAIRE

    García, Luis V.

    2005-01-01

    20 páginas, 4 tablas, 7 figuras, 46 referencias. Las Jornadas se celebraron en Noviembre de 2005 en la UAM. Forma parte del Capítulo: Transferencias de elementos en sistemas ave-suelo-planta. Este libro de resúmenes tiene 366 páginas.

  14. Ruumi kohta arvamuse avaldamiseks ei pea olema arhitekt / Katrin Koov, Ave Kongo ; intervjueerinud Merle Karro-Kalberg

    Index Scriptorium Estoniae

    Koov, Katrin, 1973-

    2016-01-01

    Erahuvikoolina tegutseva arhitektuurikooli eestvedamisel töötatakse välja ruumiõppe valikainemoodulit gümnaasiumile. Ruumiõppe puudujääkidest, võimalustest ja vajadusest räägivad arhitektide liidu president, arhitektuurikooli õpetaja Katrin Koov ja Saue gümnaasiumi kunstiõpetaja Ave Kongo

  15. Naised käsu korras firmade juhatusse! Jah või ei? / Kairi Alt, Aveli Kippari, Karl Koort... [jt.

    Index Scriptorium Estoniae

    2011-01-01

    Küsimusele vastavad Columbus IT Partner Eesti AS personalijuht Kairi Alt, Stele ja Riveli omanik Aveli Kippari, AS Panaviatic'i turundusjuht Karl Koort, OÜ Tarkvara Tehnoloogia Arenduskeskuse tegevjuht Indrek Vainu, AS PricewaterhouseCoopers auditiosakonna direktor Eva Jansen, Kalev Chocolate Factory tootmisjuht Hardo Reinike

  16. Habitat size and bird community management

    Science.gov (United States)

    Anderson, S.H.; Robbins, C.S.

    1981-01-01

    The purpose of this paper is to review the results in the literature that show the effect of area of forest on nesting migratory bird species, and to present the results of additional field work that we have conducted in forest habitats in western Maryland. These results indicate the area sensitivity of many long distance migrants. Because 80 to 95 percent of the breeding birds in the northeastern deciduous forest are neotropical migrants, the changes in bird species composition as a result of forest fragmentation can be immense. Management strategies based on habitat size are suggested to assist in maintaining communities of nesting migratory birds.

  17. Bird sexing by Fourier transform infrared spectroscopy

    Science.gov (United States)

    Steiner, Gerald; Bartels, Thomas; Krautwald-Junghanns, Maria-Elisabeth; Koch, Edmund

    2010-02-01

    Birds are traditionally classified as male or female based on their anatomy and plumage color as judged by the human eye. Knowledge of a bird's gender is important for the veterinary practitioner, the owner and the breeder. The accurate gender determination is essential for proper pairing of birds, and knowing the gender of a bird will allow the veterinarian to rule in or out gender-specific diseases. Several biochemical methods of gender determination have been developed for avian species where otherwise the gender of the birds cannot be determined by their physical appearances or characteristics. In this contribution, we demonstrate that FT-IR spectroscopy is a suitable tool for a quick and objective determination of the bird's gender. The method is based on differences in chromosome size. Male birds have two Z chromosomes and female birds have a W-chromosome and a Z-chromosome. Each Z-chromosome has approx. 75.000.000 bps whereas the W-chromosome has approx. 260.00 bps. This difference can be detected by FT-IR spectroscopy. Spectra were recorded from germ cells obtained from the feather pulp of chicks as well as from the germinal disk of fertilized but non-bred eggs. Significant changes between cells of male and female birds occur in the region of phosphate vibrations around 1080 and 1120 cm-1.

  18. Important bird areas: South Georgia

    OpenAIRE

    Clarke, Andrew; Croxall, John P.; Poncet, Sally; Anthony R Martin; Burton, Robert

    2012-01-01

    The mountainous island of South Georgia, situated in the cold but productive waters of the Southern Ocean, is one of the world’s most important seabird islands. It is estimated that over 100 million individual seabirds are based there, and that there may have been an order of magnitude more before the introduction of rats. South Georgia has 29 species of breeding bird, and is the world’s most important breeding site for six species (Macaroni Penguin Eudyptes chrysolophus, Grey-headed Albatros...

  19. Fuglene. Audubon: Birds of America

    DEFF Research Database (Denmark)

    Schlichtkrull, Torsten

    2010-01-01

    the Royal Library and the University Library, joined the library cooperation of the 1800’s on an equal standing with the other two libraries. The Classen’s Library and the library’s founder, industrialist JF Classen are described briefly in this article. Due to two library mergers the Birds of America...... is now owned by the Royal Library. The acquisition of the Danish set by the Classen’s Library is examined by analyzing previously unpublished letters and is described for the first time, although not comprehensively, in this article. The provenance of this work, as described by Waldemar Fries in 1973...

  20. Book review: Birds of Wyoming

    Science.gov (United States)

    Carr, N.B.

    2011-01-01

    "Wyoming may very well be one of the least birded states in the U.S." So begins this book, underscoring the challenges in summarizing existing knowledge for a state that falls next to last in human population density. Despite the relative dearth of "binoculars on the ground," especially in more remote areas of the state, the book offers a thorough compilation of relevant details. Much of this information is not readily accessible from other sources, and this book dispenses essential information in a very usable format. 

  1. Riqueza e densidade de aves que nidificam em cavidades em plantações abandonadas de eucalipto

    Directory of Open Access Journals (Sweden)

    Hugo de Siqueira Pereira

    2015-05-01

    Full Text Available Monoculturas de árvores, como as de espécies de eucalipto, têm substituído florestas naturais, impactando a fauna pela perda de habitat e recursos. Diversas espécies de aves necessitam de ocos em árvores para nidificar. A falta de recursos como cavidades formadas pela degradação da árvore ou locais apropriados para serem criadas cavidades leva a diminuição na abundância das populações destas espécies. Este trabalho tem o objetivo de comparar a riqueza e a densidade de aves que nidificam em ocos em áreas de plantação de eucalipto abandonadas com áreas de vegetação nativa em duas unidades de conservação em Minas Gerais. Em cada tipo de vegetação de cada reserva foram estabelecidos 25 pontos, nas quais foi utilizado o método de contagem por remoção para o levantamento das espécies de aves. A riqueza de espécies de aves de cada área foi estimada por Jackniffe e a densidade foi estimada através do método de máxima verossimilhança; modelos candidatos que poderiam influenciar a abundância das aves foram avaliados utilizando-se o Critério de Informação Akaike (AIC. Os resultados mostraram que a riqueza de espécies foi maior nas áreas de florestas nativas e que a densidade foi significantemente mais alta nas áreas de florestas nativas, e que o tipo de vegetação e a hora do dia influenciam na abundância e detecção das aves. Esses resultados indicam que as plantações de eucaliptos influenciam negativamente a comunidade de aves que nidificam em ocos, provavelmente por causa da falta de cavidades ou de sub-bosque. Plantações de eucaliptos normalmente não substituem as florestas nativas e seu uso deve ser controlado em áreas de conservação.

  2. Birds and people in semiarid northeastern Brazil: symbolic and medicinal relationships

    Science.gov (United States)

    2013-01-01

    Abstract Background At least 511 species of birds occur in the semiarid region of northeastern Brazil and many of them interact with human populations in a number of different ways, including their use in zootherapeutics and their links with local beliefs. Objective The present work examined these types of birds/human interactions (use in zootherapeutics and their links with local beliefs) in the semiarid region of Rio Grande do Norte State in northeastern Brazil. Methods Information was obtained through semi-structured interviews with 120 local residents. Results A total of 16 wild bird species distributed among 11 families were found to interact directly with humans, with Columbidae being the best represented family. Seven species were identified in the medicinal category, five were related to symbolic aspects, while four species were identified as being related to both categories (medicinal and symbolic). Conclusion The accumulated folk knowledge, beliefs, and practices involving the avifauna in the semiarid region of Brazil, whether symbolic or medicinal, demonstrated the cultural importance of this vertebrate group to local human populations and revealed a belief system intrinsically related to cynegetic practices in the region. Portuguese abstract Introdução No semiárido do Brasil ocorrem 511 espécies de aves, algumas das quais interagem frequentemente com as populações humanas locais de diferentes formas, incluindo o uso como zooterápico e a inserção em crenças. Objetivo Esta pesquisa registrou as aves diretamente associadas a essas formas de interação (o uso como zooterápico e a inserção em crenças) na região semiárida do Estado do Rio Grande do Norte, Nordeste do Brasil. Métodos As informações foram obtidas através de entrevistas semiestruturadas aplicadas a 120 moradores locais. Resultados Foram registradas 16 espécies de aves silvestres distribuídas em 11 famílias, sendo Columbidae a que apresentou o maior número de

  3. Bird-marking in the Netherlands. III. Recovery of marked Birds

    NARCIS (Netherlands)

    Oort, van E.D.

    1913-01-01

    In the following lines I have enumerated the recoveries of our marked birds, of which notice was given to me since my last paper on bird-marking in vol. XXXIV of this periodical. I have to tender my best thanks to all cooperators, to them who helped us in ringing birds, and especially to them in for

  4. Avian Assemblages at Bird Baths: A Comparison of Urban and Rural Bird Baths in Australia.

    Science.gov (United States)

    Cleary, Gráinne P; Parsons, Holly; Davis, Adrian; Coleman, Bill R; Jones, Darryl N; Miller, Kelly K; Weston, Michael A

    2016-01-01

    Private gardens provide habitat and resources for many birds living in human-dominated landscapes. While wild bird feeding is recognised as one of the most popular forms of human-wildlife interaction, almost nothing is known about the use of bird baths. This citizen science initiative explores avian assemblages at bird baths in private gardens in south-eastern Australia and how this differs with respect to levels of urbanisation and bioregion. Overall, 992 citizen scientists collected data over two, four-week survey periods during winter 2014 and summer 2015 (43% participated in both years). Avian assemblages at urban and rural bird baths differed between bioregions with aggressive nectar-eating species influenced the avian assemblages visiting urban bird baths in South Eastern Queensland, NSW North Coast and Sydney Basin while introduced birds contributed to differences in South Western Slopes, Southern Volcanic Plains and Victorian Midlands. Small honeyeaters and other small native birds occurred less often at urban bird baths compared to rural bird baths. Our results suggest that differences between urban versus rural areas, as well as bioregion, significantly influence the composition of avian assemblages visiting bird baths in private gardens. We also demonstrate that citizen science monitoring of fixed survey sites such as bird baths is a useful tool in understanding large-scale patterns in avian assemblages which requires a vast amount of data to be collected across broad areas. PMID:26962857

  5. 75 FR 3888 - Migratory Bird Subsistence Harvest in Alaska; Harvest Regulations for Migratory Birds in Alaska...

    Science.gov (United States)

    2010-01-25

    ... Register on November 20, 2009 (74 FR 60228), to propose migratory bird subsistence harvest regulations in... Fish and Wildlife Service 50 CFR Part 92 RIN 1018-AW67 Migratory Bird Subsistence Harvest in Alaska; Harvest Regulations for Migratory Birds in Alaska During the 2010 Season AGENCY: Fish and Wildlife...

  6. Avian Assemblages at Bird Baths: A Comparison of Urban and Rural Bird Baths in Australia.

    Science.gov (United States)

    Cleary, Gráinne P; Parsons, Holly; Davis, Adrian; Coleman, Bill R; Jones, Darryl N; Miller, Kelly K; Weston, Michael A

    2016-01-01

    Private gardens provide habitat and resources for many birds living in human-dominated landscapes. While wild bird feeding is recognised as one of the most popular forms of human-wildlife interaction, almost nothing is known about the use of bird baths. This citizen science initiative explores avian assemblages at bird baths in private gardens in south-eastern Australia and how this differs with respect to levels of urbanisation and bioregion. Overall, 992 citizen scientists collected data over two, four-week survey periods during winter 2014 and summer 2015 (43% participated in both years). Avian assemblages at urban and rural bird baths differed between bioregions with aggressive nectar-eating species influenced the avian assemblages visiting urban bird baths in South Eastern Queensland, NSW North Coast and Sydney Basin while introduced birds contributed to differences in South Western Slopes, Southern Volcanic Plains and Victorian Midlands. Small honeyeaters and other small native birds occurred less often at urban bird baths compared to rural bird baths. Our results suggest that differences between urban versus rural areas, as well as bioregion, significantly influence the composition of avian assemblages visiting bird baths in private gardens. We also demonstrate that citizen science monitoring of fixed survey sites such as bird baths is a useful tool in understanding large-scale patterns in avian assemblages which requires a vast amount of data to be collected across broad areas.

  7. 78 FR 67183 - Proposed Information Collection; Migratory Bird Harvest Information Program and Migratory Bird...

    Science.gov (United States)

    2013-11-08

    ... Fish and Wildlife Service Proposed Information Collection; Migratory Bird Harvest Information Program and Migratory Bird Surveys AGENCY: Fish and Wildlife Service, Interior. ACTION: Notice; request for... Bird Treaty Act (16 U.S.C. 703-711) and the Fish and Wildlife Act of 1956 (16 U.S.C. 742d)...

  8. THE BIODIVERSITY AT SANDI BIRD SANCTUARY, HARDOI WITH SPECIAL REFERENCE TO MIGRATORY BIRDS

    Directory of Open Access Journals (Sweden)

    Ashok Kumar

    2013-09-01

    Full Text Available Indian subcontinent plays host to a number of migratory birds in summers as well as winters. It is estimated that over hundred species of migratory birds fly to India, either in search of feeding grounds or to escape the severe winter of their native habitat. Sandi bird sanctuary was created in 1990 in order to protect and conserve the natural habitation and surroundings and also the marine vegetation for the migratory birds, as well as for the local people of the region. The term migration is used to describe movements of populations of birds or other animals. There are three types of migrants. One way to look at migration is to consider the distances traveled. The pattern of migration can vary within each category, but is most variable in short and medium distance migrants. The origin of migration is related to the distance traveled. The birds migrating through the area, take shelter on the river front before going to the Sandi Bird sanctuary. The birds generally migrate in the winter months of October-November-December. Bird sanctuary is a popular tourist location. Sandi particularly attracts ornithologists and bird watchers, as many rare migratory birds take refuge in the sanctuary. The bird watching camps arranged to observe the migratory birds at Sandi Bird Sanctuary in the month of October and November 2012. The migratory birds at Sandi Bird Sanctuary include great crested grebe, white storks, black lbis, glossy lbis, spoonbill, ruddy shelduck, pin tail, sholveller, spot bill duck, mallard, gadwall, wigeon, tufted pochard, gargancey teal, common teal, cotton teal, grey lag goose, coot, black tailed godwit, painted stock pin tail snipe, marsh sand piper, common tern, river tern, magpie robin, white wagtail, pied wagtail, common snipe, starlings, white lbis, red crested pochard, common pochard, painted stock, black lbis, curlew, Indian skimmer etc. The resident birds at Sandi Bird Sanctuary include little grebe, darter, purple heron, grey

  9. Contributo do design para a observação de aves

    OpenAIRE

    Santos, Ana Cláudia Rocha

    2015-01-01

    Esta dissertação explora o papel do design e o seu possível contributo para a área da ornitologia, em particular para a actividade da observação de aves. A proposta foca-se na criação de uma aplicação que permita suportar esta actividade tendo em conta os seus diferentes aspectos, isto é, que, para além da identificação das diversas espécies pelas suas características físicas e sonoras, possibilite também explorar o sentido de comunidade dos participantes, através da partilha de observações e...

  10. Arbovírus Ilheus em aves silvestres (Sporophila caerulescens e Molothrus bonariensis)

    OpenAIRE

    Pereira Luiz Eloy; Suzuki Akemi; Coimbra Terezinha Lisieux Moraes; Souza Renato Pereira de; Chamelet Esther Luiza Bocato

    2001-01-01

    OBJETIVO: Relatar o isolamento do vírus Ilheus no Estado de São Paulo e avaliar o seu impacto para a saúde pública. MÉTODOS: O isolamento de vírus foi realizado em camundongos albinos Swiss, a partir de sangue de aves silvestres, capturadas com redes de espera tipo mist net, armadas no nível do solo, no Parque Ecológico do Tietê, São Paulo. A identificação das cepas isoladas foi feita pelos testes de inibição da hemaglutinação, fixação de complemento e neutralização em camundongos. Amostras d...

  11. Assessment of bird response to the Migratory Bird Habitat Initiative using weather-surveillance radar

    Science.gov (United States)

    Sieges, Mason L.; Smolinsky, Jaclyn A.; Baldwin, Michael J.; Barrow, Wylie C.; Randall, Lori A.; Buler, Jeffrey J.

    2014-01-01

    In response to the Deepwater Horizon oil spill in spring 2010, the Natural Resources Conservation Service implemented the Migratory Bird Habitat Initiative (MBHI) to provide temporary wetland habitat for migrating and wintering waterfowl, shorebirds, and other birds along the northern Gulf of Mexico via managed flooding of agricultural lands. We used weather-surveillance radar to conduct broad regional assessments of bird response to MBHI activities within the Mississippi Alluvial Valley and the West Gulf Coastal Plain. Across both regions, birds responded positively to MBHI management by exhibiting greater relative bird densities within sites relative to pre-management conditions in prior years and relative to surrounding non-flooded agricultural lands. Bird density at MBHI sites was generally greatest during winter for both regions. Unusually high flooding in the years prior to implementation of the MBHI confounded detection of overall changes in remotely sensed soil wetness across sites. The magnitude of bird response at MBHI sites compared to prior years and to non-flooded agricultural lands was generally related to the surrounding landscape context: proximity to areas of high bird density, amount of forested wetlands, emergent marsh, non-flooded agriculture, or permanent open water. However, these relationships varied in strength and direction between regions and seasons, a finding which we attribute to differences in seasonal bird composition and broad regional differences in landscape configuration and composition. We detected greater increases in relative bird use at sites in closer proximity to areas of high bird density during winter in both regions. Additionally, bird density was greater during winter at sites with more emergent marsh in the surrounding landscape. Thus, bird use of managed wetlands could be maximized by enrolling lands located near areas of known bird concentration and within a mosaic of existing wetlands. Weather-radar observations

  12. Breeding Bird Survey and bird banding data: Applications to raptor research and management

    Science.gov (United States)

    Sauer, J.R.; Droege, S.; Bystrak, D.

    1991-01-01

    The Breeding Bird Survey (BBS) and Bird Banding Laboratory (BBL) are sources of information for raptor biologists. The BBS has been conducted each year since 1966 in the United States and Canada; historical bird banding records extend back to the early 20th century. BBS data can be used to document population trends and breeding distributions of many bird species. Banding data are generally collected for specific and local studies of bird populations or behavior. Past use of these data has been limited by their volume and relative inaccessibility. In this paper, we present an overview of BBS and BBL raptor data and their uses, limitations and availability.

  13. Aves acuáticas de la Laguna de Agua Dulce y el Estero El Ermitaño, Jalisco, México

    OpenAIRE

    Salvador Hernández Vázquez

    2005-01-01

    Se analizó la presencia y número de aves acuáticas, así como la distribución estacional y espacial de los diferentes grupos en la laguna de Agua Dulce y el estero El Ermitaño, Jalisco, México, entre diciembre de 1997 a noviembre de 1998. Considerando únicamente el mes de máxima abundancia de cada especie hubo 86 471 aves en ambos humedales (29 686 en Agua Dulce y 56 785 en El ermitaño), y una abundancia acumulada (suma de las abundancias mensuales) de 179 808 aves (66 976 en Agua Dulce y 112 ...

  14. Pesquisa de helmintes gastrointestinais em quatro espécies de aves de rapina na zona centro de Portugal : Buteo buteo, Falco tinnunculus, Tyto alba e Athene noctua

    OpenAIRE

    Antunes, Ana Filipa Negrão

    2016-01-01

    issertação de Mestrado Integrado em Medicina Veterinária Os helmintes gastrointestinais são parasitas comuns em aves de rapina. Estudos sobre estes parasitas em aves de rapina não são abundantes a nível nacional, mas existe cada vez mais um maior interesse. O objetivo foi aprofundar estes conhecimentos no que diz respeito às principais aves de rapina existentes em Portugal: águia-d’asa-redonda (Buteo buteo), peneireiro-vulgar (Falco tinnunculus), coruja-das-torres (Tyto alba) e...

  15. AVE5026, a new hemisynthetic ultra-low-molecular-weight heparin for the prevention of venous thromboembolism in patients after total knee replacement surgery

    DEFF Research Database (Denmark)

    Lassen, Michael Rud; Dahl, O E; Mismetti, P;

    2009-01-01

    -daily doses of AVE5026 (5, 10, 20, 40, or 60 mg) or enoxaparin 40 mg in the calibrator arm. The primary efficacy end point was VTE until post-operative day 11, defined as deep vein thrombosis (DVT) detected by bilateral venography, symptomatic DVT, non-fatal pulmonary embolism (PE) and VTE-related death......BACKGROUND: AVE5026 is a new hemisynthetic ultra-low-molecular-weight heparin, with a novel anti-thrombotic profile resulting from high anti-factor (F)Xa activity and residual anti-FIIa activity. AVE5026 is in clinical development for venous thromboembolism (VTE) prevention, a frequent complication...

  16. Ability of Slovakian Pupils to Identify Birds

    Science.gov (United States)

    Prokop, Pavol; Rodak, Rastislav

    2009-01-01

    A pupil's ability to identify common organisms is necessary for acquiring further knowledge of biology. We investigated how pupils were able to identify 25 bird species following their song, growth habits, or both features presented simultaneously. Just about 19% of birds were successfully identified by song, about 39% by growth habit, and 45% of…

  17. Additional records of birds from Formosa (Taiwan)

    NARCIS (Netherlands)

    Mees, G.F.

    1977-01-01

    Since the publication of my paper on birds from Formosa (Mees, 1970), a few more collections have been received from the same source. A ban has now been placed on hunting and export of wild birds by the government of the Republic of China — an enlightened and overdue piece of legislation — with the

  18. Accurate Segmentation for Infrared Flying Bird Tracking

    Institute of Scientific and Technical Information of China (English)

    ZHENG Hong; HUANG Ying; LING Haibin; ZOU Qi; YANG Hao

    2016-01-01

    Bird strikes present a huge risk for air ve-hicles, especially since traditional airport bird surveillance is mainly dependent on inefficient human observation. For improving the effectiveness and efficiency of bird monitor-ing, computer vision techniques have been proposed to detect birds, determine bird flying trajectories, and pre-dict aircraft takeoff delays. Flying bird with a huge de-formation causes a great challenge to current tracking al-gorithms. We propose a segmentation based approach to enable tracking can adapt to the varying shape of bird. The approach works by segmenting object at a region of inter-est, where is determined by the object localization method and heuristic edge information. The segmentation is per-formed by Markov random field, which is trained by fore-ground and background mixture Gaussian models. Exper-iments demonstrate that the proposed approach provides the ability to handle large deformations and outperforms the m ost state-of-the-art tracker in the infrared flying bird tracking problem.

  19. Fernbank Forest Birds in the Summer.

    Science.gov (United States)

    Schmalz, Georgann

    1991-01-01

    Provided is a listing of the common nesting birds and the neotropical migrant birds with nesting records in the approximate 65 acres of Fernbank Forest which is a preserve of mature urban hardwoods and pines within 10 miles of downtown Atlanta and a relic of what was once a large, uninterrupted tract of the Piedmont forest. (JJK)

  20. Two Good Places for Bird Lovers

    Institute of Scientific and Technical Information of China (English)

    1999-01-01

    In the middle and lower reaches of the YangtzRiver,Poyang Lake and Dongting Lake are the towbiggest freshwater lakes in China and are also two ofthe most famous bird reserves in the country.Themagnificent scene of the large number of migrantbirds that fly over every winter is attracting more andmore bird lovers.

  1. 14 CFR 33.76 - Bird ingestion.

    Science.gov (United States)

    2010-01-01

    ... Aeronautics and Space FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION AIRCRAFT AIRWORTHINESS STANDARDS: AIRCRAFT ENGINES Design and Construction; Turbine Aircraft Engines § 33.76 Bird ingestion. (a... engine shall be limited to aircraft installations in which it is shown that a bird cannot strike...

  2. Pheromones in birds: myth or reality?

    NARCIS (Netherlands)

    Caro, S.P.; Balthazart, J.

    2010-01-01

    Birds are anosmic or at best microsmatic… This misbelief persisted until very recently and has strongly influenced the outcome of communication studies in birds, with olfaction remaining neglected as compared to acoustic and visual channels. However, there is now clear empirical evidence showing tha

  3. Current perspectives on the evolution of birds

    NARCIS (Netherlands)

    Ericson, P.G.P.

    2008-01-01

    The paper summarizes the current understanding of the evolution and diversification of birds. New insights into this field have mainly come from two fundamentally different, but complementary sources of information: the many newly discovered Mesozoic bird fossils and the wealth of genetic analyses o

  4. Bird feeders and their effects on bird-window collisions at residential houses

    Directory of Open Access Journals (Sweden)

    Justine A. Kummer

    2015-12-01

    Full Text Available Feeding wild birds creates an important link between homeowners and conservation. The effects of bird feeders and year-round feeding on birds have not been well studied, however, particularly in relationship to bird-window collisions. We determined effects of bird feeder presence and placement on bird-window collisions at residential homes. Paired month-long trials in which a feeder was either present or absent for one month and then removed or added for the second month were completed at 55 windows at 43 houses. In each trial, homeowners were asked to search their study window daily for evidence of a bird-window collision. During the study there were 51 collisions when there was no bird feeder and 94 when the feeder was present. The season when each trial was set up was the best individual predictor of bird-window collisions. The largest number of collisions was observed during fall migration and the lowest during the winter months. There were no collisions at 26 of the study windows. High variance was observed in the number of collisions at different houses, indicating that effects of bird feeders are context dependent. Changing the occurrence, timing, and placement of feeders can alter collision rates but is only one of many factors that influence whether a residential house is likely to have a bird window-collision or not.

  5. Campylobacter spp. and birds of prey.

    Science.gov (United States)

    Dipineto, Ludovico; De Luca Bossa, Luigi Maria; Russo, Tamara Pasqualina; Cutino, Eridania Annalisa; Gargiulo, Antonio; Ciccarelli, Francesca; Raia, Pasquale; Menna, Lucia Francesca; Fioretti, Alessandro

    2014-06-01

    A total of 170 birds of prey admitted to two Wildlife Rescue and Rehabilitation Centers of Italy were examined. Birds were divided by diurnal (n = 15) and nocturnal (n = 7) species, sampled by cloacal swabs, and examined for Campylobacter spp. by cultural and molecular methods. Campylobacter spp. were isolated in 43 out of the 170 (25.3%) birds of prey examined. Among these, 43/43 (100%) were identified as Campylobacter jejuni and 10/43 (23.3%) were identified as Campylobacter coli recovered from mixed infections. Diurnal birds of prey showed a significantly higher prevalence value (P = 0.0006) for Campylobacter spp. than did nocturnal birds of prey. PMID:25055637

  6. Phylogenetic and morphologic evidence confirm the presence of a new montane cloud forest associated bird species in Mexico, the Mountain Elaenia (Elaenia frantzii; Aves: Passeriformes: Tyrannidae).

    Science.gov (United States)

    Hanna, Zachary R; Ortiz-Ramírez, Marco F; Ríos-Muñoz, César A; Cayetano-Rosas, Héctor; Bowie, Rauri C K; Navarro-Sigüenza, Adolfo G

    2016-01-01

    Here we provide evidence to support an extension of the recognized distributional range of the Mountain Elaenia (Elaenia frantzii) to include southern Mexico. We collected two specimens in breeding condition in northwestern Sierra Norte de Chiapas, Mexico. Morphologic and genetic evidence support their identity as Elaenia frantzii. We compared environmental parameters of records across the entire geographic range of the species to those at the northern Chiapas survey site and found no climatic differences among localities. PMID:26855860

  7. Multi-scale habitat selection in highly territorial bird species: Exploring the contribution of nest, territory and landscape levels to site choice in breeding rallids (Aves: Rallidae)

    Science.gov (United States)

    Jedlikowski, Jan; Chibowski, Piotr; Karasek, Tomasz; Brambilla, Mattia

    2016-05-01

    Habitat selection often involves choices made at different spatial scales, but the underlying mechanisms are still poorly understood, and studies that investigate the relative importance of individual scales are rare. We investigated the effect of three spatial scales (landscape, territory, nest-site) on the occurrence pattern of little crake Zapornia parva and water rail Rallus aquaticus at 74 ponds in the Masurian Lakeland, Poland. Habitat structure, food abundance and water chemical parameters were measured at nests and random points within landscape plots (from 300-m to 50-m radius), territory (14-m) and nest-site plots (3-m). Regression analyses suggested that the most relevant scale was territory level, followed by landscape, and finally by nest-site for both species. Variation partitioning confirmed this pattern for water rail, but also highlighted the importance of nest-site (the level explaining the highest share of unique variation) for little crake. The most important variables determining the occurrence of both species were water body fragmentation (landscape), vegetation density (territory) and water depth (at territory level for little crake, and at nest-site level for water rail). Finally, for both species multi-scale models including factors from different levels were more parsimonious than single-scale ones, i.e. habitat selection was likely a multi-scale process. The importance of particular spatial scales seemed more related to life-history traits than to the extent of the scales considered. In the case of our study species, the territory level was highly important likely because both rallids have to obtain all the resources they need (nest site, food and mates) in relatively small areas, the multi-purpose territories they defend.

  8. Shifts in composition of avian communities related to temperate-grassland afforestation in southeastern South America Alterações na composição de comunidades de aves relacionadas ao florestamento de campos temperados no sudeste da América do Sul

    Directory of Open Access Journals (Sweden)

    Rafael A. Dias

    2013-03-01

    Full Text Available Afforestation of temperate grasslands with fast-growing trees for industrial pulpwood production is spreading in South America. Despite high afforestation rates resulting from governmental policies that stimulate pulpwood production in grasslands of southern Brazil and Uruguay, the impact of this activity on biodiversity remains to be properly assessed. We used an Impact-Reference study design to evaluate how grassland afforestation affects the composition of grassland bird assemblages. We sampled eucalyptus plantations and neighboring natural grasslands in southern Brazil from 2006-2009, and relied on nested sampling and analysis to separate the effects of afforestation from the natural variability of grasslands. We recorded a significant difference in composition between assemblages from grasslands and tree plantations. Species adapted to open, treeless areas tended to be negatively affected in relation to edge or forest birds in eucalyptus plantations. Afforestation is systematically replacing the bird assemblage of hilltop grasslands by a collection of common edge and forest species that occur in nearby riverine and hillside forests. Although most grassland birds negatively affected by tree plantations are common and widespread, observed and predicted afforestation rates in southeastern South America may result in regional population reductions in the near future.O florestamento de campos temperados com árvores de crescimento rápido para a produção industrial de celulose está aumentando na América do Sul. Apesar das elevadas taxas de florestamento resultantes de políticas governamentais que estimulam o plantio de árvores para celulose em campos do sul do Brasil e Uruguai, o impacto dessa atividade sobre a biodiversidade ainda carece de avaliação adequada. Utilizamos um delineamento experimental do tipo impacto-referência para avaliar como o florestamento dos campos afeta a composição da assembleia de aves campestres. Amostramos

  9. Monitoramento do maçarico-branco, Calidris alba (Pallas (Aves, Scolopacidae, através de recuperações de anilhas coloridas, na Coroa do Avião, Igarassu, Pernambuco, Brasil Monitoring of the sanderling, Calidris alba (Pallas (Aves, Scolopacidae, across recuperations of color band, in the Coroa do Avião, Pernambuco State, Brazil

    Directory of Open Access Journals (Sweden)

    Rachel M. de Lyra-Neves

    2004-06-01

    Full Text Available Programas de marcação de espécies migratórias vêm sendo desenvolvidos desde a década de 1980, dentre eles o PASP Pan-American Shorebirds Programs, o qual, consistia na marcação de aves migratórias neárticas com anéis e bandeirolas coloridas possibilitando formação de códigos individuais permitindo a observação das aves marcadas sem que necessitasse capturar. Esta pesquisa objetivou a recuperação de códigos do PASP de indivíduos de Calidris alba (Pallas 1764 entre os anos de 1993 a 1995 na Coroa do Avião. Essas recuperações visuais demonstraram a fidelidade de Calidris alba ao seu sítio de invernada, a Coroa do Avião. O alto percentual de recuperações de Calidris alba, bem como, as recuperações de indivíduos anilhados na Lagoa do Peixe e em algumas áreas de invernada nos Estados Unidos, demonstram a utilização da rota do Atlântico e reforça a idéia de que bandos provenientes da costa leste do Alaska migram por esta rota. A idade máxima estimada para Calidris alba durante esta pesquisa foi de 11 anos, nada se tem sobre a idade desta espécie em bibliografias específicas no estudo de Scolopacidae.Marking programs for migratory species have been developed since the 1980 decade, among them the PASP Pan-American Shorebirds Programs which consisted in the marking of nearctic migratory birds with color bands and flags, enabling the development of individual codes, allowing the observation of the marked birds without the need of capture. The purpose of this study was the recuperation of PASP codes of individuals of Calidris alba (Pallas, 1764 between 1993 and 1995 in the Coroa do Avião. These visual recuperations demonstrated the fidelity of this specie to its winter site, the Coroa do Avião. The high percentual of recuperations of Calidris alba, as well as the recuperations of marked individuals in the Lagoa do Peixe and in some wintering areas in the United States, demonstrated the use of the Atlantic route and

  10. La dieta de la lechuza (Tyto alba (Aves: Strigiformes en hábitats naturales y antropogénicos de la región central de Cuba Diet of Barn Owl (Tyto alba (Aves: Strigiformes in natural and anthropogenic habitat in central Cuba

    Directory of Open Access Journals (Sweden)

    Abel Hernández-Muñoz

    2011-03-01

    Full Text Available Para determinar los hábitos tróficos de la lechuza, Tyto alba, se analizaron 1232 egagrópilas recolectadas entre 1994 y 2001 en 24 localidades de la región central de Cuba. Se encontraron 3943 presas; los roedores exóticos (Mus musculus y Rattus spp. fueron las presas dominantes y representaron 80% del total. Otros tipos de presas fueron de menor frecuencia; por ejemplo, insectos (6.1%, murciélagos (5%, anfibios (4.8%, aves (3.6% y reptiles (0.2%. Se agruparon las localidades de recolecta de egagrópilas en 2 categorías de hábitat: antropogénicos y naturales, para explorar el efecto de los disturbios antrópicos en la dieta de la lechuza. Contrario a lo esperado, no se encontró variación significativa en el índice de amplitud trófica de Levins (Bantropogénicos= 1.32 ± 0.3 vs Bnaturales = 1.38 ± 0.4. La composición de la dieta en ambos hábitats no difiere, al menos en la proporción de las diferentes clases, aunque existe la tendencia a depredar más aves en hábitats naturales que en sitios perturbados donde los insectos son más frecuentes. Los resultados sugieren que tanto en hábitats antropogénicos como naturales, las lechuzas se comportan como depredadores efectivos de las poblaciones de roedores múridos introducidos.To determine food habits of Barn Owl, Tyto alba, we analyzed 1232 pellets collected from 24 localities in central Cuba from 1994 to 2001. The pellets yielded 3943 prey items, with introduced rodents (Mus musculus and Rattus spp. being the primary prey, accounting for 80% of items in the diet. Other prey classes were of minor frequency; e.g., insects (6.1%, bats (5%, amphibians (4.8%, birds (3.6%, and reptiles (0.2%.We grouped pellet collection localities into 2 habitat categories: "anthropogenic" and "natural," to explore the effect of anthropogenic disturbance on the diet Barn Owl. Contrary to our expectation, we found no significant difference in the Levin's niche-breadth index (B, calculated for the

  11. A review on current knowledge and future prospects of organohalogen contaminants (OHCs) in Asian birds.

    Science.gov (United States)

    Abbasi, Naeem Akhtar; Malik, Riffat Naseem; Frantz, Adrien; Jaspers, Veerle Leontina Bernard

    2016-01-15

    The release of harmful chemicals in the Asian environment has recently increased dramatically due to rising industrial and agricultural activities. About 60% of the global human population is currently living on the Asian continent and may thus be exposed to a large range of different chemicals. Different classes of organohalogen chemicals have indeed been reported in various environmental compartments from Asia including humans and wildlife, but this issue has received less attention in birds. In this article, we reviewed the available literature on levels of legacy persistent organic pollutants (POPs) and various flame retardants (FRs) in Asian avifauna to analyze the existing pool of knowledge as well as to identify the gaps that should be addressed in future research. Furthermore, we discussed the variation in levels of organohalogens based on differences in regions, trophic level, dietary sources and migratory behaviors of species including distribution patterns in different tissues of birds. Although the mass of published literature is very low and even absent in many important regions of Asia, we deduced from the reported studies that levels of almost all classes of organohalogens (OHCs) including FRs were highest in East Asian countries such as Japan, China and South Korea, except for HCHs that were found at maximum levels in birds of South India. Concentrations (ng/g LW) of different OHCs in Asian birds ranged between aves. Among

  12. A reappraisal of Cerebavis cenomanica (Aves, Ornithurae), from Melovatka, Russia

    DEFF Research Database (Denmark)

    Walsh, Stig A.; Milner, Angela C.; Bourdon, Estelle

    2016-01-01

    The evolution of the avian brain is of crucial importance to studies of the transition from non-avian dinosaurs to modern birds, but very few avian fossils provide information on brain morphological development during the Mesozoic. An isolated specimen from the Cenomanian of Melovatka in Russia w...

  13. A history of digit identification in the manus of theropods (including Aves)

    DEFF Research Database (Denmark)

    Hansen, Kasper Lykke

    2010-01-01

    an originally pentadactyl forelimb, either digits I, II and III form in the manus of birds and thus support a dinosaurian ancestry, or digits II, III and IV form in the manus supporting a more ancient ancestry or an evolutionary frameshift. A review of the history of research into the subject is presented here...

  14. TES Carbon Monoxide Validation during the Two AVE Campaigns using the Argus and ALIAS Instruments on NASA's WB-57F

    Science.gov (United States)

    Lopez, Jinena P.; Luo, Ming; Christensen, Lance E.; Loewenstein, Max; Jost, Hansjurg; Webster, Christopher R.; Osterman, Greg

    2008-01-01

    The Aura Validation Experiment (AVE) focuses on validating Aura satellite measurements of important atmospheric trace gases using ground-based, aircraft, and balloon-borne instruments. Global satellite observations of CO from the Tropospheric Emission Spectrometer (TES) on the EOS Aura satellite have been ongoing since September 2004. This paper discusses CO validation experiments during the Oct-AVE (2004 Houston, Texas) and CR-AVE (2006 San Jose, Costa Rica) campaigns. The coincidences in location and time between the satellite observations and the available in situ profiles for some cases are not ideal. However, the CO distribution patterns in the two validation flight areas are shown to have very little variability in the aircraft and satellite . observations, thereby making them suitable for validation comparisons. TES CO profiles, which typically have a retrieval uncertainty of 10-20%, are compared with in situ CO measurements from NASA Ames Research Center's Argus instrument taken on board the WB-57F aircraft during Oct-AVE. TES CO retrievals during CR-AVE are compared with in situ measurements from Jet Propulsion Laboratory's Aircraft Laser Infrared Absorption Spectrometer (ALIAS) instrument as well as with the Argus instrument, both taken on board the WB-57F aircraft. During CR-AVE, the average overall difference between ALIAS and Argus CO was 4%, with the ALIAS measurement higher. During individual flights, 2-min time-averaged differences between the two in situ instruments had standard deviation of 14%. The TES averaging kernels and a priori constraint profiles for CO are applied to the in situ data for proper comparisons to account for the reduced vertical resolution and the influence of the a priori in the satellite-derived profile. In the TES sensitive pressure range, approx.700-200 hPa, the in situ profiles and TES profiles agree within 5-10%, less than the variability in CO distributions obtained by both TES and the aircraft instruments in the two

  15. Territory size of three Antbirds (Aves, Passeriformes in an Atlantic Forest fragment in southeastern Brazil Tamanho de território de três espécies de Thamnophilidae (Aves, Passeriformes em um fragmento de Mata Atlântica no sudeste do Brasil

    Directory of Open Access Journals (Sweden)

    Charles Duca

    2006-09-01

    Full Text Available Territory size is an important ecological attribute of populations that has been considered a factor determines population density. Antbirds is a large group of mainly insectivorous Neotropical passerines, usually well represented in bird communities from forested landscapes in Neotropical region. Territory sizes for three Antbirds, Thamnophilus caerulescens (Vieillot, 1816 (Variable Antshrike, Dysithamnus mentalis (Temmink, 1823 (Plain Antvireo e Pyriglena leucoptera (Vieillot, 1818 (White-shouldered Fire-eye, were mapped and their area estimated by the convex polygon method in a 50 ha forest fragment, in southeastern Brazil. The three species presented small territories of similar sizes ( T. caerulescens > D. mentalis. We failed to find any effect on territory size for the three species associated with forest edge or distance to the dirt road.O tamanho do território é um importante atributo ecológico das populações, sendo considerado um fator que pode determinar densidades populacionais. Os Thamnophilidae formam um grupo diverso de pássaros insetívoros, usualmente representativos nas comunidades de aves em florestas da região Neotropical. Neste estudo estimamos o tamanho de território de três espécies de Thamnophilidae, Thamnophilus caerulescens (Vieillot, 1816 (Choca-da-mata, Dysithamnus mentalis (Temmink, 1823 (Choquinha-lisa e Pyriglena leucoptera (Vieillot, 1818 (Papa-taoca-do-sul, através do método de polígono convexo, em um fragmento de Mata Atlântica no sudeste do Brasil. Os territórios foram pequenos ( T. caerulescens > D. mentalis. Não foi observada nenhuma relação entre o tamanho do território e sua distância à borda da mata e à estrada para as três espécies.

  16. Transfer imidža turistične tržne znamke države na ostale njene znamke

    OpenAIRE

    Kline, Miro; Berginc, Dario

    2014-01-01

    V prispevku je predstavljen pomen prenosov imidžev med tržnimi znamkami države, posebej pa je izpostavljen transfer imidža s strani turistične tržne znamke države na njene ostale tržne znamke, prav tako pa tudi na njeno korporativno tržno znamko. Najprej je prikazan koncept tržne znamke države in njenega imidža, vezanega tudi na državo kot turistično destinacijo. V nadaljevanju sta opisana koncepta specifičnega transferja turistične tržne znamke ter model mreže imidžev države. V empiričnem de...

  17. AVE-763B尿沉渣分析仪检测液路的维护及故障处理体会

    Institute of Scientific and Technical Information of China (English)

    胡志勇; 童燕

    2010-01-01

    为了解决AVE-763B尿沉渣分析仪在日常工作中检测液路的常见故障,通过对AVE-763B分析仪检测液路的摸索,总结出一些解决AVE-763B分析仪检测液路常见故障的处理方法和维护保养知识,由此笔者认为充分掌握AVE-763B尿沉渣分析仪常见故障的处理方法和维护保养知识在处理繁重的日常工作中相当重要.

  18. Impact of estuarine pollution on birds

    Science.gov (United States)

    Blus, L.J.; Wiemeyer, Stanley N.; Kerwin, J.A.; Stendell, R.C.; Ohlendorf, H.M.; Stickel, L.F.

    1977-01-01

    Pollution of estuaries affects bird populations indirectly through changes in habitat and food supply. The multi-factor pollution of Chesapeake Bay has resulted in diminution of submerged aquatic plants and consequent change in food habits of the canvasback duck. Although dredge-spoil operations can improve wildlife habitat, they often result in its demise. Pollution of estuaries also affects birds directly, through chemical toxication, which may result in outright mortality or in reproductive impairment. Lead from industrial sources and roadways enters the estuaries and is accumulated in tissues of birds. Lead pellets deposited in estuaries as a result of hunting are consumed by ducks with sufficient frequency .to result m large annual die-offs from lead poisoning. Fish in certain areas, usually near industrial sources, may contain levels of mercury high enough to be hazardous to birds that consume them. Other heavy metals are present in estuarine birds, but their significance is poorly known. Oil exerts lethal or sublethal effects on birds by oiling their feathers, oiling eggs and young by contaminated parents, and by ingestion of oil-contaminated food. Organochlorine chemicals, of both agricultural and industrial origin, travel through the food chains and reach harmful levels in susceptible species of birds in certain estuarine ecosystems. Both outright mortality and reproductive impairment have occurred.

  19. Overseas seed dispersal by migratory birds.

    Science.gov (United States)

    Viana, Duarte S; Gangoso, Laura; Bouten, Willem; Figuerola, Jordi

    2016-01-13

    Long-distance dispersal (LDD) promotes the colonization of isolated and remote habitats, and thus it has been proposed as a mechanism for explaining the distributions of many species. Birds are key LDD vectors for many sessile organisms such as plants, yet LDD beyond local and regional scales has never been directly observed nor quantified. By sampling birds caught while in migratory flight by GPS-tracked wild falcons, we show that migratory birds transport seeds over hundreds of kilometres and mediate dispersal from mainland to oceanic islands. Up to 1.2% of birds that reached a small island of the Canary Archipelago (Alegranza) during their migration from Europe to Sub-Saharan Africa carried seeds in their guts. The billions of birds making seasonal migrations each year may then transport millions of seeds. None of the plant species transported by the birds occurs in Alegranza and most do not occur on nearby Canary Islands, providing a direct example of the importance of environmental filters in hampering successful colonization by immigrant species. The constant propagule pressure generated by these LDD events might, nevertheless, explain the colonization of some islands. Hence, migratory birds can mediate rapid range expansion or shifts of many plant taxa and determine their distribution.

  20. Ácaros de penas e carrapatos (Acari associados a Turdus albicollis Vieillot (Aves, Muscicapidae em uma área de Mata Atlântica da Ilha Grande, Rio de Janeiro, Brasil Feather mites and ticks (Acari associated to Turdus albicollis Vieillot (Aves, Muscicapidae in an area of Atlantic Forest at Ilha Grande, Rio de Janeiro, Brasil

    Directory of Open Access Journals (Sweden)

    Alline Storni

    2005-06-01

    Full Text Available O parasitismo é um importante mecanismo que afeta populações e comunidades. O objetivo deste estudo foi investigar a fauna de ectoparasitos que habita o corpo do sabiá-de-coleira, Turdus albicollis Vieillot, 1818 e avaliar se a massa corporal do hospedeiro é afetada por estes parasitos. Os indivíduos de T. albicollis foram mensalmente capturados na Ilha Grande, Rio de Janeiro, no período de julho de 1999 a junho de 2000, em uma área de Floresta Atlântica. As aves foram individualmente marcadas, pesadas e examinadas para registrar e quantificar a presença de ectoparasitos. A abundância e a localização dos parasitos no corpo do hospedeiro foram registradas. Em 54 indivíduos de T. albicollis amostrados, foram encontrados duas espécies de ectoparasitos. A prevalência de ácaros de penas, Pterodectes turdinus Berla, 1959, foi de 72,2% enquanto que a de carrapatos, Amblyomma longirostre Koch, 1844, foi de 27,8%. A abundância mensal de P. turdinus foi significativamente relacionada com os meses do ano, sendo maior nos meses com menor freqüência de chuva. Não houve relação estatisticamente significativa entre a massa corporal do hospedeiro (g e a abundância total de ácaros de penas e carrapatos.Parasitism is an important mechanism affecting populations and communities. The purpose of this study was to investigate the ectoparasites fauna living on the body of the white-necked trush, Turdus albicollis Vieillot, 1818, and to evaluate if the host body mass is affected by these parasites. Turdus albicollis were monthly captured at Ilha Grande, Rio de Janeiro, from July 1999 to June 2000 in an area of Atlantic Forest. The birds were individualy marked, weighed and carefully checked to record and quantify the presence of ectoparasites. Parasite abundance and location on the bird's body were recorded. In 54 individuals of T. albicollis sampled, two ectoparasite species were found. The prevalence of the feather mite Pterodectes turdinus

  1. Data for NASA's AVE 3 experiment: 25-mb sounding data and synoptic charts. [investigation of atmospheric parameters detected from satellite data under conditions of heavy snow cover

    Science.gov (United States)

    Fuelberg, H. E.; Turner, R. E.

    1975-01-01

    The atmospheric variability experiment (AVE 3) is described and tabulated rawinsonde data at 25-mb intervals from the surface to 25 mb for the 41 stations is presented. The experiment was conducted between February 6 and February 7, 1975. Brief discussions are given on methods of data processing, changes in the reduction scheme since the AVE 2 pilot experiment, and data accuracy. An example of contact data is presented as well as synoptic charts prepared from the data.

  2. Primer registro de aves fósiles (Pelecaniformes: Pelecanidae y un probable Odontopterygiformes: Pelagornithidae para el Mioceno Superior de Costa Rica

    Directory of Open Access Journals (Sweden)

    Ana L. Valerio

    2013-12-01

    Full Text Available Se registran por primera vez para Costa Rica restos de dos aves marinas fósiles (Aves: Pelecaniformes y Odontopterygiformes procedentes de la Formación Curré de edad Mioceno Superior. Estos hallazgos están asociados a sedimentos marino someros y concuerdan con otros vertebrados fósiles marinos asociados como cetáceos, tiburones y rayas.

  3. Primer registro de aves fósiles (Pelecaniformes: Pelecanidae y un probable Odontopterygiformes: Pelagornithidae) para el Mioceno Superior de Costa Rica

    OpenAIRE

    Ana L Valerio; César A. Laurito

    2013-01-01

    Se registran por primera vez para Costa Rica restos de dos aves marinas fósiles (Aves: Pelecaniformes y Odontopterygiformes) procedentes de la Formación Curré de edad Mioceno Superior. Estos hallazgos están asociados a sedimentos marino someros y concuerdan con otros vertebrados fósiles marinos asociados como cetáceos, tiburones y rayas.

  4. Estudo retrospectivo de afecções cirúrgicas em aves

    Directory of Open Access Journals (Sweden)

    Patrícia F. Castro

    2013-05-01

    Full Text Available Avaliaram-se retrospectivamente as cirurgias realizadas em aves no Serviço de Cirurgia de Pequenos Animais do Hospital Veterinário da Faculdade de Medicina Veterinária e Zootecnia, Universidade de São Paulo, durante período de oito anos. De um total de 90 intervenções cirúrgicas para diagnóstico e/ou tratamento de afecções, 27 foram ortopédicas e 63 de tecidos moles. Quanto ao percentual de cirurgias ortopédicas realizadas segundo as diferentes ordens, observou-se: Psittaciformes 85,19%, Piciformes 7,41%, Anseriformes 3,70% e Falconiformes 3,70%. Para as de tecidos moles os Psittaciformes representaram 92,06%, Columbiformes 3,17%, Passeriformes 3,17% e Anseriformes 1,60%. Entre os tipos de afecções ortopédicas encontradas as fraturas apresentaram a maior ocorrência (88,90%, seguidas de luxação (3,70%, avulsão traumática de extremidade (3,70% e artrite/osteomielite (3,70%. Dentre as afecções cirúrgicas de tecidos moles as neoplasias apresentaram a maior ocorrência (30,15%, seguidas das neoformações cutâneas ou de anexos não neoplásicos (17,46%, neoformações cutâneas sem diagnóstico (7,94%, distocia (7,94%, fístula de papo (7,94%, hérnia abdominal (4,76%, sinusite (4,76%, gangrena de extremidade de membros (3,17%, perfuração de esôfago (3,17%, prolapso de cloaca (3,17%, "Necrose avascular de dígito" (1,59%, ferida na região da quilha (1,59%, perfuração de cavidade celomática (1,59%, neoformação em cavidade celomática sem diagnóstico (1,59%, corpo estranho em trato gastrointestinal (1,59% e otite (1,59%. A distribuição das afecções cirúrgicas segundo as espécies acometidas mostrou o "grupo dos papagaios", representado em sua maioria por espécies do gênero Amazona, como prevalente. O conhecimento das afecções cirúrgicas e espécies de aves mais acometidas acrescentam informações para aqueles que já atuam nesta área e servem como indicador de estudo para futuros cirurgiões de aves.

  5. Evidence for Bird Mafia! Threat Pays

    OpenAIRE

    Gadagkar, Raghavendra; Kolatkar, Milind

    1996-01-01

    Birds are remarkable for their extraordinary efforts at nest building and brood care. Given that so many species of birds spend so much time and effort at these activities, there is plenty of room for some species to take it easy, lay their eggs in the nests of other species and hitch-hike on their hosts. The cuckoo that lays its eggs in the nests of a variety of host species is well known. Indeed, over 80 species, i.e., over 1% of bird species are known to be such obligate inter-specific bro...

  6. Microbiological survey of birds of prey pellets.

    Science.gov (United States)

    Dipineto, Ludovico; Bossa, Luigi Maria De Luca; Pace, Antonino; Russo, Tamara Pasqualina; Gargiulo, Antonio; Ciccarelli, Francesca; Raia, Pasquale; Caputo, Vincenzo; Fioretti, Alessandro

    2015-08-01

    A microbiological survey of 73 pellets collected from different birds of prey species housed at the Wildlife Rescue and Rehabilitation Center of Napoli (southern Italy) was performed. Pellets were analyzed by culture and biochemical methods as well as by serotyping and polymerase chain reaction. We isolated a wide range of bacteria some of them also pathogens for humans (i.e. Salmonella enterica serotype Typhimurium, Campylobacter coli, Escherichia coli O serogroups). This study highlights the potential role of birds of prey as asymptomatic carriers of pathogenic bacteria which could be disseminated in the environment not only through the birds of prey feces but also through their pellets. PMID:26026881

  7. The First Mesozoic Heterodactyl Bird from China

    Institute of Scientific and Technical Information of China (English)

    ZHANG Zihui; HOU Lianhai; HASEGAWA Yoshikasu; Jingmai O'CONNOR; Larry D.MARTIN; Luis M.CHIAPPE

    2006-01-01

    Dalingheornis liweii gen. et sp. nov., a new enantiornithine bird was collected from the early Cretaceous Yixian Formation in northeastern China. It is the first record of a highly specialized heterodactyl foot in Mesozoic birds. The Y-shaped furcula with short hypocleidum is different from that of other enantiornithines. The minor metacarpal is robust and longer than the major metacarpal.A long bony tail composed of 20 caudal vertebrae with chevrons resembling those of dromaeosaurids and thus, highlighting again the evolutionary relationship between birds and non-avian theropods.Well-preserved alula feathers and a heterodactyl foot provide strong evidence for the arboreal habit of Dalingheornis.

  8. La glándula uropigia de aves de distintos ambientes: su estructura y función

    OpenAIRE

    Chiale, María Cecilia

    2016-01-01

    La glándula uropigia de las aves es un órgano sebáceo compacto ubicado dorsalmente sobre las últimas vértebras caudales. Es muy variable en cuanto a su forma y tamaño pero, generalmente, está formada por dos lóbulos y en su extremo caudal posee una papila; en ésta última región se encuentran los poros excretores que suelen ser dos en la mayoría de las aves, pero en algunos casos se observó que éste número puede ser mayor. También es posible encontrar un pincel de plumas rodeando los poros exc...

  9. El Virus del Nilo Occidental y las Aves Silvestres de Colombia: experiencia en San Andrés Islas

    Directory of Open Access Journals (Sweden)

    Diego Soler-Tovar

    2006-06-01

    Full Text Available El Virus del Nilo Occidental (VNO es una zoonosis transmitida por zancudos (Culex spp., por lo tanto pertenece al grupo de los Arbovirus, se clasifica dentro del género Flavivirus, familia Flaviviridae. El virión es de cadena sencilla, ARN de secuencia positiva de aproximadamente 11 kb (kilobases. Pertenece al serocomplejo de la Encefalitis Japonesa. Debido a la actualidad e importancia del VNO, entre septiembre de 2005 y febrero de 2006, se realizo una investigación entre la Línea de Microbiología y Epidemiología Veterinaria de la Facultad de Medicina Veterinaria y de Zootecnia de la Universidad Nacional de Colombia y la Fundación ProAves, con el apoyo del Centro de Control y Prevención de Enfermedades de los Estados Unidos (CDC, para detectar el VNO en aves silvestres de San Andrés Islas, Colombia.

  10. Helmintos gastrointestinales en aves acuáticas de la subcuenca alta del río Lerma, México Gastrointestinal helminth in waterfowl of the upper Lerma river sub-basin, Mexico

    Directory of Open Access Journals (Sweden)

    Marcela Martínez-Haro

    2012-03-01

    Full Text Available Se realizó un inventario y se calcularon los parámetros de infección de los helmintos gastrointestinales de 36 ejemplares de aves acuáticas pertenecientes a las familias Anatidae, Rallidae y Threskiornithidae, procedentes de la subcuenca alta del río Lerma, Estado de México, identificándose 20 especies: 9 tremátodos, 8 céstodos, 2 nemátodos y 1 acantocéfalo. De las 8 especies de céstodos, 6 son registros nuevos para el país y Pseudocorynosoma constrictum se registra por primera vez en Anas crecca, Anas discors, Oxyura jamaicensis y Fulica americana. Los helmintos que presentaron las prevalencias más altas fueron los céstodos Hymenolepis megalops y Sobolevicanthus krabbeella en Anas acuta, Anas clypeata, Anas cyanoptera y Anas crecca.A survey of helminth parasites in 36 waterfowl species from the upper Lerma River, in central Mexico was conducted. A total of 20 helminth species were recorded, including 9 trematodes, 8 cestodes, 2 nematodes and 1 acanthocephalan. Six of the cestode species are recorded for the fisrt time from Mexican birds; the acanthocephalan Pseudocorynosoma constrictum is reported for the first time in Anas crecca, A. discors, Oxyura jamaicensis and Fulica americana. The highest prevalences were recorded for the cestodes Hymenolepis megalops and Sobolevicanthus krabbeella in Anas acuta, A. clypeata, A. cyanoptera and A. crecca.

  11. AVE-763尿液分析仪、尿干化学分析仪及镜检法尿检的对比研究

    Institute of Scientific and Technical Information of China (English)

    周娟

    2009-01-01

    目的 探讨AVE-763尿液有形成分分析仪与尿干化学分析仪及尿显微镜检三种方法 检测尿中红、白细胞并将结果 比较分析.方法 将所收集的样本分装两管,按仪器操作规程和尿显微镜检查规程分别使用AVE-763尿液分析仪、BW-200尿干化学分析仪和光学显微镜测定.结果 尿RBC总检出率AVE-763为31.%,W-200为33.%,显微镜为25.%;尿WBC总检出率AVE-763为32.%,W-200为12.%,显微镜为29.%.结论 AVE-763分析仪检测尿中RBC和WBC结果 与显微镜检相近,无明显差异(P>0.5);AVE-763分析仪结合BW-200对尿中RBC和WBC的敏感性和准确性将大大提高;当尿液混浊有干扰因素存在时必须用显微镜复检.

  12. VIGILANCIA CENTINELA PARA EL VIRUS DEL OESTE DEL NILO EN CULICIDOS Y AVES DOMÉSTICAS EN EL DEPARTAMENTO DE CÓRDOBA

    Directory of Open Access Journals (Sweden)

    Manolo Jaramillo

    2005-12-01

    Full Text Available El virus del Oeste del Nilo (VON género Flavivirus, familia Flaviviridae, es mantenido en la naturaleza en un cicloenzoótico ave-mosquito-ave. Las aves son los hospederos amplificadores primarios. Humanos y caballos sonhospederos incidentales finales. En humanos las infecciones se manifiestan como enfermedad febril autolimitada.También puede presentarse encefalitis o meningoencefalitis. El virus se ha establecido en Norte América y se hadocumentado su circulación en México, Jamaica, República Dominicana, Guadalupe, Cuba, Puerto Rico, ElSalvador y recientemente en Colombia. Se realizó una vigilancia centinela en culícidos y aves domésticas parahacer un seguimiento a la circulación en el departamento de Córdoba e identificar que especies de mosquitosestaban infectadas con el virus. Se analizaron 4942 mosquitos en 99 pooles por la técnica Vec TestTM (MedicalSystem, Inc. Camarillo, CA y 162 sueros de aves de corral fueron enviadas al Centers for Disease Control andPrevention Division of Vector-Borne Infectious Diseases Fort Collins, USA, para ser analizadas por MAC-ELISA ydebido a las reacciones cruzadas que se dan entre el VON y otros virus del serocomplejo de la encefalitis japonesase utilizó el test de reducción de la neutralización en placa (PRNT. No se obtuvieron mosquitos o aves positivos

  13. Efficiency of playback for assessing the occurrence of five bird species in Brazilian Atlantic Forest fragments

    Directory of Open Access Journals (Sweden)

    Danilo Boscolo

    2006-12-01

    Full Text Available Playback of bird songs is a useful technique for species detection; however, this method is usually not standardized. We tested playback efficiency for five Atlantic Forest birds (White-browed Warbler Basileuterus leucoblepharus, Giant Antshrike Batara cinerea, Swallow-tailed Manakin Chiroxiphia caudata, Whiteshouldered Fire-eye Pyriglena leucoptera and Surucua Trogon Trogon surrucura for different time of the day, season of the year and species abundance at the Morro Grande Forest Reserve (South-eastern Brazil and at thirteen forest fragments in a nearby landscape. Vocalizations were broadcasted monthly at sunrise, noon and sunset, during one year. For B. leucoblepharus, C. caudata and T. surrucura, sunrise and noon were more efficient than sunset. Batara cinerea presented higher efficiency from July to October. Playback expanded the favourable period for avifaunal surveys in tropical forest, usually restricted to early morning in the breeding season. The playback was efficient in detecting the presence of all species when the abundance was not too low. But only B. leucoblepharus and T. surrucura showed abundance values significantly related to this efficiency. The present study provided a precise indication of the best daily and seasonal periods and a confidence interval to maximize the efficiency of playback to detect the occurrence of these forest species.A técnica de play-back é muito útil para a detecção de aves, mas este método geralmente não é padronizado. Sua eficiência em atestar a ocorrência de cinco espécies de aves da Mata Atlântica (Pula-pula-assobiador Basileuterus leucoblepharus, Batará Batara cinerea, Tangará Chiroxiphia caudata, Olho-de-fogo Pyriglena leucoptera e Surucuá-de-barriga-vermelha Trogon surrucura foi analisada de acordo com o horário do dia, estação do ano e abundância das espécies na Reserva Florestal do Morro Grande (São Paulo, Brasil e em treze fragmentos florestais de uma paisagem adjacente

  14. Spider, bee, and bird communities in cities are shaped by environmental control and high stochasticity.

    Science.gov (United States)

    Sattler, T; Borcard, D; Arlettaz, R; Bontadina, F; Legendre, P; Obrist, M K; Moretti, M

    2010-11-01

    Spatially organized distribution patterns of species and communities are shaped by both autogenic processes (neutral mechanism theory) and exogenous processes (niche theory). In the latter, environmental variables that are themselves spatially organized induce spatial structure in the response variables. The relative importance of these processes has not yet been investigated in urban habitats. We compared the variance explained by purely spatial, spatially structured environmental, and purely environmental components for the community composition of spiders (Araneae), bees (Apidae), and birds (Aves) at 96 locations in three Swiss cities. Environmental variables (topography, climate, land cover, urban green management) were measured on four different radii around sampling points (Spider communities reacted to very fine-scaled environmental changes of lawn and meadow management and climate. Bird community composition was determined by woody plants as well as solar radiation at all radii, the scale of the influence varying among species. Bee communities were weakly explained by isolated variables only. Our results suggest that the anthropogenic structuring of urban areas has disrupted the spatial organization of environmental variables and inhibited the development of biotic spatial processes. The near absence of spatial structure may therefore be a feature typical of urban species assemblages, resulting in urban community composition mainly influenced by local environmental variables. Urban environments represent a close-knit mosaic of habitats that are regularly disturbed. Species communities in urban areas are far from equilibrium. Our analysis also suggests that urban communities need to be considered as being in constant change to adapt to disturbances and changes imposed by human activities. PMID:21141195

  15. Avaliação de uma equação de predição das exigências protéicas para aves reprodutoras pesadas na fase de produção Evaluation of a prediction equation of crude protein for broiler breeder hens

    Directory of Open Access Journals (Sweden)

    Carlos Bôa-Viagem Rabello

    2002-06-01

    Full Text Available O objetivo do presente trabalho foi avaliar uma equação de predição das exigências de proteína bruta (PB para reprodutoras pesadas na fase de produção. O experimento foi realizado com 600 aves reprodutoras pesadas, Hubbard HI-Y, durante o período de 31 a 46 semanas de idade, alojadas em boxes num delineamento experimental inteiramente casualizado com três tratamentos e cinco repetições de 40 aves. Os tratamentos consistiram de: T1- Fornecimento de PB de acordo com o manual da linhagem (controle, T2- Fornecimento de PB de acordo com a equação de predição determinada, utilizando os dados de desempenho médio das aves do tratamento controle para predizer as exigências e T3- Fornecimento de PB de acordo com a equação de predição determinada, utilizando os dados de desempenho de cada parcela experimental para predizer as exigências, onde a equação de predição avaliada foi: PB=2,282.P0,75+0,356.G+0,262.MO, sendo PB a exigência de proteína bruta (g/ave/dia, P o peso corporal (kg, G o ganho de peso (g e MO a massa de ovos (g. As rações foram formuladas para atender as exigências nutricionais e quando necessário eram incluídos os aminoácidos sintéticos, metionina, lisina, triptofano, treonina e arginina. As aves alimentadas de acordo com a equação ingeriram menores quantidades de proteína (20,8g/dia quando comparadas às alimentadas de acordo com as recomendações (23,80g, entretanto isto levou a menores pesos dos ovos refletindo no peso dos pintos. A equação de predição proporcionou melhores resultados quanto à eficiência protéica. Assim, concluiu-se que a equação de predição não forneceu a quantidade mínima de proteína bruta para atender as exigências dos aminoácidos não suplementados na dieta.The objective of this study was to evaluated a crude protein requirement equation elaborated for broiler breeders. The experiment was conducted with 600 31-weeks old Hubbard HI-Y broiler breeders in a

  16. Cativeiro de aves como fonte de Cryptococcus neoformans na cidade de Campo Grande, Mato Grosso do Sul, Brasil

    Directory of Open Access Journals (Sweden)

    Filiú Wander Fernando de Oliveira

    2002-01-01

    Full Text Available Cryptococcus neoformans é a levedura capsulada causadora de criptococose em humanos e animais. A variedade neoformans, encontrada em diversas fontes ambientais, inclusive habitats de aves, é importante causa de mortalidade em indivíduos com AIDS em todo o Mundo. Contudo, ainda não há estudos sobre a sua ecologia na região Centro Oeste brasileira, onde há registro da ocorrência de casos humanos da micose. Para estudar fontes saprofíticas de C. neoformans, na cidade de Campo Grande, foram coletadas 20 amostras de excretas de aves em distintos ambientes. Suspensão das amostras em salina estéril foram semeadas em placas com meio ágar níger. Após 5 dias, colônias mucóides marrom-escuro foram subcultivadas para identificação através de provas morfofisiológicas, determinação da variedade e sorotipagem. C. neoformans var. neoformans sorotipo A foi isolado de 10 (50% das amostras, comprovando a ocorrência saprofítica de C. neoformans na cidade de Campo Grande, relacionada a habitat de aves em cativeiro.

  17. Spider, bee, and bird communities in cities are shaped by environmental control and high stochasticity.

    Science.gov (United States)

    Sattler, T; Borcard, D; Arlettaz, R; Bontadina, F; Legendre, P; Obrist, M K; Moretti, M

    2010-11-01

    Spatially organized distribution patterns of species and communities are shaped by both autogenic processes (neutral mechanism theory) and exogenous processes (niche theory). In the latter, environmental variables that are themselves spatially organized induce spatial structure in the response variables. The relative importance of these processes has not yet been investigated in urban habitats. We compared the variance explained by purely spatial, spatially structured environmental, and purely environmental components for the community composition of spiders (Araneae), bees (Apidae), and birds (Aves) at 96 locations in three Swiss cities. Environmental variables (topography, climate, land cover, urban green management) were measured on four different radii around sampling points (Bee communities were weakly explained by isolated variables only. Our results suggest that the anthropogenic structuring of urban areas has disrupted the spatial organization of environmental variables and inhibited the development of biotic spatial processes. The near absence of spatial structure may therefore be a feature typical of urban species assemblages, resulting in urban community composition mainly influenced by local environmental variables. Urban environments represent a close-knit mosaic of habitats that are regularly disturbed. Species communities in urban areas are far from equilibrium. Our analysis also suggests that urban communities need to be considered as being in constant change to adapt to disturbances and changes imposed by human activities.

  18. Ornithologists by Design: Kindergarteners Design, Construct, and Evaluate Bird Feeders

    Science.gov (United States)

    Shorter, Angela; Segers, Marcia

    2016-01-01

    How can an engineer design a bird feeder that attracts many birds? This question resulted from kindergarten students' observations of the bird feeders in their school's bird sanctuary. The challenging question is the heart of project-based learning (PBL), a teaching strategy in which students tackle real-world problems and design projects to solve…

  19. 14 CFR 25.631 - Bird strike damage.

    Science.gov (United States)

    2010-01-01

    ... 14 Aeronautics and Space 1 2010-01-01 2010-01-01 false Bird strike damage. 25.631 Section 25.631... STANDARDS: TRANSPORT CATEGORY AIRPLANES Design and Construction General § 25.631 Bird strike damage. The... airplane after impact with an 8-pound bird when the velocity of the airplane (relative to the bird...

  20. 50 CFR 20.20 - Migratory Bird Harvest Information Program.

    Science.gov (United States)

    2010-10-01

    ... 50 Wildlife and Fisheries 6 2010-10-01 2010-10-01 false Migratory Bird Harvest Information Program... IMPORTATION OF WILDLIFE AND PLANTS (CONTINUED) MIGRATORY BIRD HUNTING Taking § 20.20 Migratory Bird Harvest... information will be used to provide a sampling frame for the national Migratory Bird Harvest Survey....

  1. 50 CFR 92.22 - Subsistence migratory bird species.

    Science.gov (United States)

    2010-10-01

    ... 50 Wildlife and Fisheries 6 2010-10-01 2010-10-01 false Subsistence migratory bird species. 92.22... (CONTINUED) MISCELLANEOUS PROVISIONS MIGRATORY BIRD SUBSISTENCE HARVEST IN ALASKA General Regulations Governing Subsistence Harvest § 92.22 Subsistence migratory bird species. You may harvest birds or...

  2. 50 CFR 20.40 - Gift of migratory game birds.

    Science.gov (United States)

    2010-10-01

    ... 50 Wildlife and Fisheries 6 2010-10-01 2010-10-01 false Gift of migratory game birds. 20.40... WILDLIFE AND PLANTS (CONTINUED) MIGRATORY BIRD HUNTING Possession § 20.40 Gift of migratory game birds. No person may receive, possess, or give to another, any freshly killed migratory game birds as a...

  3. All about Owls: Studying Owls, State Birds, and Endangered Species.

    Science.gov (United States)

    Rivard, Leonard P.

    1991-01-01

    Activities are included that acquaint students with the parts of birds and the structure of feathers; that identify the prey of owls by opening owl pellets; working with information about threatened and endangered species of birds; and follow-up activities for bird study. A list of state and provincial birds of the United States and Canada and…

  4. 19 CFR 10.76 - Game animals and birds.

    Science.gov (United States)

    2010-04-01

    ... 19 Customs Duties 1 2010-04-01 2010-04-01 false Game animals and birds. 10.76 Section 10.76... TREASURY ARTICLES CONDITIONALLY FREE, SUBJECT TO A REDUCED RATE, ETC. General Provisions Animals and Birds § 10.76 Game animals and birds. (a) The following classes of live game animals and birds may...

  5. Uso estructural del hábitat por una comunidad de aves en bosques de rebollo (Quercus pyrenaica, Willd

    Directory of Open Access Journals (Sweden)

    Calvo, Jesús M.

    1994-12-01

    Full Text Available The influence on the bird community of 9 structural zones in two plots of Iberian oak-woodland (Quercus pyrenaica with differences in vegetation structure was studied. Bird utilization of vegetation was measured by taking samples of each observed individual every 30 seconds, specifying the zone used as a food resource. Existence of a preferential selection in tree top and shrub was verified in the "Monte" plot, whereas tree top and ground in "Dehesa" plot were the preferential zones. The incidence of the seasons in the utilization of some zones (tree top, shrub and air was proven, while others zones (ground and trunks maintained an uniform level of utilization all year round. Shrub is used more in Iberian-oak forest than in other evergreen Quercus woods, while the opposite happens for the ground. The hardest period for birds in the study forest in the winter, while in other evergreen Mediterranean woods It is the summer.

    Depto. de Biología Animal, Facultad de Biología, Universidad de Salamanca, 37071- Salamanca, España [es] Se estudia la influencia que ejercen sobre la comunidad de aves, las 9 zonas estructurales definidas dentro de dos parcelas de rebollar que presentan diferente estructura de su vegetación. La utilización del medio se midió observando cada individuo a intervalos de 30 segundos, anotando la zona sobre la que se encontraba buscando alimento. Se comprueba la selección preferencial de la copa de los árboles y del matorral en la parcela "Monte" y de la copa y el suelo en la parcela "Dehesa". Se pone de manifiesto la incidencia de la estacionalidad sobre la selección de algunos sustratos (copa de árboles, matorral y aire, mientras que otros mantienen una utilización más uniforme durante todo el año (suelo y troncos. El matorral es más ampliamente empleado en el rebollar que en bosques de Quercus perennes ibéricos, mientras que sucede lo contrario respecto al empleo del suelo. El invierno

  6. North Mississippi Refuge Complex Bird Observations 2010

    Data.gov (United States)

    US Fish and Wildlife Service, Department of the Interior — Bird observations on Coldwater River NWR in 2010 were recorded by the refuge biologist and several other birders. No sampling design was used to generate the...

  7. Coldwater River NWR Ancillary Bird Observations 2006

    Data.gov (United States)

    US Fish and Wildlife Service, Department of the Interior — Ancillary bird observations on Coldwater River NWR in 2006 were recorded by local birders. No sampling design was used to generate the observations

  8. North Mississippi Refuge Complex Bird Observations 2011

    Data.gov (United States)

    US Fish and Wildlife Service, Department of the Interior — Bird observations on Coldwater River and Tallahatchie NWR in 2011 were recorded by the refuge biologist and several other birders. No sampling design was used to...

  9. North Mississippi Refuge Complex Bird Observations 2009

    Data.gov (United States)

    US Fish and Wildlife Service, Department of the Interior — Bird observations on Coldwater River and Tallahatchie NWR in 2009 were recorded by the refuge biologist and several other birders. No sampling design was used to...

  10. North Mississippi Refuge Complex Bird Observations 1999

    Data.gov (United States)

    US Fish and Wildlife Service, Department of the Interior — Anecdotal bird observations from Tallahatchie NWR, the Black Bayou Unit Coldwater River NWR and surrounding areas throughout 1999 were recorded by the refuge...

  11. Coldwater River NWR Ancillary Bird Observations 2009

    Data.gov (United States)

    US Fish and Wildlife Service, Department of the Interior — Ancillary bird observations on Coldwater River NWR in 2009 were recorded by local birders. No sampling design was used to generate the observations

  12. North Mississippi Refuge Complex Bird Observations 2008

    Data.gov (United States)

    US Fish and Wildlife Service, Department of the Interior — Bird observations on Coldwater River, Dahomey and Tallahatchie NWR in 2008 were recorded by the refuge biologist and several other birders. No sampling design was...

  13. Coldwater River NWR Bird Observations 2007

    Data.gov (United States)

    US Fish and Wildlife Service, Department of the Interior — Bird observations on Coldwater River NWR in 2007 were recorded by the refuge biologist and several other birders. No sampling design was used to generate the...

  14. Problems confronting migratory birds in Alaska

    Data.gov (United States)

    US Fish and Wildlife Service, Department of the Interior — We describe in this paper problems affecting the well-being of Alaska's migratory birds in the belief that recognition of these problems is a step towards finding...

  15. Population dynamics of marine birds: Annual report

    Data.gov (United States)

    US Fish and Wildlife Service, Department of the Interior — The characteristic dynamics of Alaskan marine bird populations are being described from studies conducted at 12 OCSEAP-funded and 6nonOCSEAP-funded U. S. Fish and...

  16. Cardiovascular physiology and diseases of pet birds.

    Science.gov (United States)

    Pees, Michael; Krautwald-Junghanns, Maria-Elisabeth

    2009-01-01

    Avian cardiac disease in pet birds occurs more often than previously assumed. The article focuses on anatomic peculiarities of the avian cardiovascular system and common diseases. Diagnostic possibilities are demonstrated, and therapeutic measures are discussed.

  17. Freeze-frame fruit selection by birds

    Science.gov (United States)

    Foster, Mercedes S.

    2008-01-01

    The choice of fruits by an avian frugivore is affected by choices it makes at multiple hierarchical levels (e.g., species of fruit, individual tree, individual fruit). Factors that influence those choices vary among levels in the hierarchy and include characteristics of the environment, the tree, and the fruit itself. Feeding experiments with wild-caught birds were conducted at El Tirol, Departamento de Itapua, Paraguay to test whether birds were selecting among individual fruits based on fruit size. Feeding on larger fruits, which have proportionally more pulp, is generally more efficient than feeding on small fruits. In trials (n = 56) with seven species of birds in four families, birds selected larger fruits 86% of the time. However, in only six instances were size differences significant, which is likely a reflection of small sample sizes.

  18. Riparian Birds - Sierra Nevada Foothill [ds303

    Data.gov (United States)

    California Department of Resources — These data are summary statistics of abundances of birds counted within 100-m radius circles with 10-minute point counts at multiple sample points along 36 randomly...

  19. Birds - Spears and Didion Ranches [ds315

    Data.gov (United States)

    California Department of Resources — These data are summary statistics of abundances of birds counted within 100-m radius circles with 10-minute point counts at 15 sample points within Spears and...

  20. Current methods of oiled bird rehabilitation

    Data.gov (United States)

    US Fish and Wildlife Service, Department of the Interior — Oil Spill Response Workshop cosponsored by the Office of Migratory Bird Management and the Office of Biological Services, U.S. Fish & Wildlife Service, Dept. of...

  1. Birds of the Shatan River Basin, Mongolia

    Directory of Open Access Journals (Sweden)

    Onolragchaa Ganbold

    2015-06-01

    Full Text Available In our study we recorded 149 species of birds belonging to 97 genera and 36 families in 15 orders. These bird species compose 32% of Mongolian registered bird fauna. Of these 149 species, 54% are passeriformes. Our observation was held in three different habitats: mountains ranging with rocks and forest (88 species, river basins (45 species, and an area around human habitation, specifically train stations outside towns (16 species. Of our studied bird species, 11 are enlisted in the International Union for Conservation of Nature red list as endangered, vulnerable, or near threatened species, and 144 are known as least concerned. Also 20 species are listed in Annexes I and II of the Convention on International Trade in Endangered Species, and 15 species are listed in Annexes I and II of the Convention on the Conservation of Migratory Species.

  2. Birds of the Okefenokee National Wildlife Refuge

    Data.gov (United States)

    US Fish and Wildlife Service, Department of the Interior — Bird list containng 201 documented species by either refuge staff or visiting ornithologists. Taxonomic standard adheres to Fifth A.O.U. Check-List. Species...

  3. Migratory Bird Disease Contingency Plan: Louisa NWR

    Data.gov (United States)

    US Fish and Wildlife Service, Department of the Interior — The Migratory Bird Disease Contingency Plan for Louisa National Wildlife Refuge is intended to serve as a ready reference for background information, an inventory...

  4. Marsh Bird Monitoring Activities in Vermont 2000

    Data.gov (United States)

    US Fish and Wildlife Service, Department of the Interior — As part of ongoing research into the status of Vermont's marsh birds, a statewide census of the black tern nesting population was undertaken again in the year 2000....

  5. THE BIODIVERSITY AT SANDI BIRD SANCTUARY, HARDOI WITH SPECIAL REFERENCE TO MIGRATORY BIRDS

    OpenAIRE

    Ashok Kumar; Meena Srivastav

    2013-01-01

    Indian subcontinent plays host to a number of migratory birds in summers as well as winters. It is estimated that over hundred species of migratory birds fly to India, either in search of feeding grounds or to escape the severe winter of their native habitat. Sandi bird sanctuary was created in 1990 in order to protect and conserve the natural habitation and surroundings and also the marine vegetation for the migratory birds, as well as for the local people of the region. The term migration i...

  6. Taxonomic status and biology of the Cuban blackhawk, Buteogallus anthracinus gundlachii (AVES: Accipitridae)

    Science.gov (United States)

    Wiley, J.W.; Garrido, O.H.

    2005-01-01

    We reevaluate the taxonomic status of the Cuban population of the Common Black-Hawk (Buteogallus anthracinus) based on our examination of additional specimens, nests, eggs, and voice data. Buteogallus a. gundlachii is smaller than mainland populations of anthracinus and differs from mainland birds in plumage coloration and pattern. The common (alarm) call of gundlachii is a series of three or four notes, differing from that of mainland anthracinus, whose call consists of 9-24 notes. In the Isla de Pinos, Cuba, we observed gundlachii eating two species of land crabs (71.4%), centipedes (7.1%), lizards (10.7%), mammals (7.1%), and a bird (3.6%). We consider Buteogallus gundlachii Cabanis 1854 (1855), the Cuban Black-Hawk, to be a full species, endemic to Cuba, Isla de Pinos, and many of the cays of the Cuban Archipelago. ?? 2005 The Raptor Research Foundation, Inc.

  7. Nucleolar organizer regions in Sittasomus griseicapillus and Lepidocolaptes angustirostris (Aves, Dendrocolaptidae: evidence of a chromosome inversion

    Directory of Open Access Journals (Sweden)

    Marcelo de Oliveira Barbosa

    2013-01-01

    Full Text Available Cytogenetic studies in birds are still scarce compared to other vertebrates. Woodcreepers (Dendrocolaptidae are part of a highly specialized group within the Suboscines of the New World. They are forest birds exclusive to the Neotropical region and similar to woodpeckers, at a comparable evolutionary stage. This paper describes for the first time the karyotypes of the Olivaceous and the Narrow-billed Woodcreeper using conventional staining with Giemsa and silver nitrate staining of the nucleolar organizer regions (Ag-NORs. Metaphases were obtained by fibular bone marrow culture. The chromosome number of the Olivaceous Woodcreeper was 2n = 82 and of the Narrow-billed Woodcreeper, 2n = 82. Ag-NORs in the largest macrochromosome pair and evidence of a chromosome inversion are described herein for the first time for this group.

  8. Hitchhikers’ guide to analysing bird ringing data

    OpenAIRE

    Harnos Andrea; Fehérvári Péter; Csörgő Tibor

    2015-01-01

    Bird ringing datasets constitute possibly the largest source of temporal and spatial information on vertebrate taxa available on the globe. Initially, the method was invented to understand avian migration patterns. However, data deriving from bird ringing has been used in an array of other disciplines including population monitoring, changes in demography, conservation management and to study the effects of climate change to name a few. Despite the widespread usage and importance, there are n...

  9. Flight performance of the largest volant bird

    OpenAIRE

    Ksepka, Daniel T.

    2014-01-01

    A fossil species of pelagornithid bird exhibits the largest known avian wingspan. Pelagornithids are an extinct group of birds known for bony tooth-like beak projections, large size, and highly modified wing bones that raise many questions about their ecology. At 6.4 m, the wingspan of this species was approximately two times that of the living Royal Albatross. Modeling of flight parameters in this species indicates that it was capable of highly efficient gliding and suggests that pelagornith...

  10. The birds of Genome10K

    OpenAIRE

    OBrien, Stephen J; Haussler, David; Ryder, Oliver

    2014-01-01

    Everyone loves the birds of the world. From their haunting songs and majesty of flight to dazzling plumage and mating rituals, bird watchers – both amateurs and professionals - have marveled for centuries at their considerable adaptations. Now, we are offered a special treat with the publication of a series of papers in dedicated issues of Science, Genome Biology and GigaScience (which also included pre-publication data release). These present the successful beginnings of an international int...

  11. Green Light for Nocturnally Migrating Birds

    OpenAIRE

    Wernand, Marcel R.; Maurice A. H. Donners; Han de Vries; Ens, Bruno J.; Hanneke Poot; Joop M. Marquenie

    2008-01-01

    The nighttime sky is increasingly illuminated by artificial light sources. Although this ecological light pollution is damaging ecosystems throughout the world, the topic has received relatively little attention. Many nocturnally migrating birds die or lose a large amount of their energy reserves during migration as a result of encountering artificial light sources. This happens, for instance, in the North Sea, where large numbers of nocturnally migrating birds are attracted to the many offsh...

  12. Are predatory birds effective secondary seed dispersers?

    OpenAIRE

    Nogales, Manuel; Quilis, Vicente; Medina, Félix M.; Mora, Juan L.; Trigo, Laura S.

    2002-01-01

    We have studied the unusual phenomenon of secondary seed dispersal of Lycium intricatum seeds on a small oceanic Atlantic island (Alegranza, Canarian Archipelago)in which a small frugivorous lizard (Gallotia atlantica) and two different predatory birds participate, a shrike (Lanius excubitor) and a kestrel (Falco tinnunculus). Endemic lizards that are common prey of both bird species consume Lycium fruits. Lizard remains were significantly matched with the presence of Lycium fruits in the reg...

  13. Identification, Classification, and Growth of Moa Chicks (Aves: Dinornithiformes) from the Genus Euryapteryx

    OpenAIRE

    Leon Huynen; Brian J Gill; Anthony Doyle; Millar, Craig D.; Lambert, David M

    2014-01-01

    Background The analysis of growth in extinct organisms is difficult. The general lack of skeletal material from a range of developmental states precludes determination of growth characteristics. For New Zealand's extinct moa we have available to us a selection of rare femora at different developmental stages that have allowed a preliminary determination of the early growth of this giant flightless bird. We use a combination of femora morphometrics, ancient DNA, and isotope analysis to provide...

  14. A new subspecies of Chamaea fasciata (Wrentit) from Oregon (Aves: Timaliinae)

    Science.gov (United States)

    Browning, M. Ralph

    1992-01-01

    Geographic variation in plumage color of Chamaea fasciata (Wrentit) from northern California and southern Oregon is related to climate. A new subspecies, Chamaea fasciata margra, is described from a disjunct population of southern interior Oregon. Colonization of C. fasciata in interior Oregon was perhaps from birds crossing coniferous forests via isolated balds of Ceonothus. Recent increases of Wrentits in interior Oregon may be in response to habitat alterations (deforestation, fires) and concurrent global warming.

  15. A high-precision chronology for the rapid extinction of New Zealand moa (Aves, Dinornithiformes)

    Science.gov (United States)

    Perry, George L. W.; Wheeler, Andrew B.; Wood, Jamie R.; Wilmshurst, Janet M.

    2014-12-01

    Megafaunal extinction followed the prehistoric human settlement of islands across the globe, but the exact duration and dynamics of the extinction processes are difficult to determine. The New Zealand moa (Aves, Dinornithiformes) are a prime example, where, despite an extensive fossil and archaeological record, debate continues about their extinction chronology and how extinction timings varied among regions and species. We apply probabilistic sightings methods to 111 high-quality radiocarbon dates (from a pool of 653 dates) on moa remains from natural and archaeological sites to provide a high-resolution spatio-temporal chronology of moa extinction. We interpret this alongside an estimated time for the onset of hunting pressure, obtained by applying the same methods to the most reliable proxies for initial human settlement of New Zealand: coprolites of and seeds gnawed by the commensal Pacific rat (Rattus exulans). By comparing local and national extinction times, we discriminate between the point at which hunting stopped (economic extinction) and the total extinction of moa (ca 150 and 200 years after settlement, respectively). Extinction occurred contemporaneously at sites separated by hundreds of kilometres. There was little difference between the extinction times of the smallest (20-50 kg) and largest (200+ kg) moa species. Our results demonstrate how rapidly megafauna were exterminated from even large, topographically- and ecologically-diverse islands such as New Zealand, and highlight the fragility of such ecosystems in the face of human impacts.

  16. Phylogenetic relationships within the Laridae (Charadriiformes: Aves) inferred from mitochondrial markers.

    Science.gov (United States)

    Pons, J-M; Hassanin, A; Crochet, P-A

    2005-12-01

    Gulls (Aves: Laridae) constitute a recent and cosmopolite family of well-studied seabirds for which a robust phylogeny is needed to perform comparative and biogeographical analyses. The present study, the first molecular phylogeny of all Larids species (N=53), is based on a combined segment of mtDNA (partial cytochrome b and control region). We discuss our phylogenetic tree in the light of previous suggestions based on morphological, behavioral, and plumage characters. Although the phylogeny is not fully resolved, it highlights several robust species groups and confirms or identifies for the first time some sister relationships that had never been suggested before. The Dolphin Gull (Leucophaeus scoresbii) for instance, is identified as the sister species of the Grey Gull (Larus modestus) and the Ross's Gull (Rhodostethia rosea) forms a monophyletic group with the Little Gull (Larus minutus). Our results clearly demonstrate that the genus Larus as currently defined is not monophyletic, since current taxonomy of gulls is based on the use of convergent phenotypic characters. We propose a new systematic arrangement that better reflects their evolutionary history. PMID:16054399

  17. Resolving lost herbivore community structure using coprolites of four sympatric moa species (Aves: Dinornithiformes).

    Science.gov (United States)

    Wood, Jamie R; Wilmshurst, Janet M; Richardson, Sarah J; Rawlence, Nicolas J; Wagstaff, Steven J; Worthy, Trevor H; Cooper, Alan

    2013-10-15

    Knowledge of extinct herbivore community structuring is essential for assessing the wider ecological impacts of Quaternary extinctions and determining appropriate taxon substitutes for rewilding. Here, we demonstrate the potential for coprolite studies to progress beyond single-species diet reconstructions to resolving community-level detail. The moa (Aves: Dinornithiformes) of New Zealand are an intensively studied group of nine extinct herbivore species, yet many details of their diets and community structuring remain unresolved. We provide unique insights into these aspects of moa biology through analyses of a multispecies coprolite assemblage from a rock overhang in a montane river valley in southern New Zealand. Using ancient DNA (aDNA), we identified 51 coprolites, which included specimens from four sympatric moa species. Pollen, plant macrofossils, and plant aDNA from the coprolites chronicle the diets and habitat preferences of these large avian herbivores during the 400 y before their extinction (∼1450 AD). We use the coprolite data to develop a paleoecological niche model in which moa species were partitioned based on both habitat (forest and valley-floor herbfield) and dietary preferences, the latter reflecting allometric relationships between body size, digestive efficiency, and nutritional requirements. Broad ecological niches occupied by South Island giant moa (Dinornis robustus) and upland moa (Megalapteryx didinus) may reflect sexual segregation and seasonal variation in habitat use, respectively. Our results show that moa lack extant ecological analogs, and their extinction represents an irreplaceable loss of function from New Zealand's terrestrial ecosystems. PMID:24082104

  18. Marine debris ingestion by Magellanic penguins, Spheniscus magellanicus (Aves: Sphenisciformes), from the Brazilian coastal zone.

    Science.gov (United States)

    Brandão, Martha L; Braga, Karina M; Luque, José L

    2011-10-01

    Magellanic penguins (Spheniscus magellanicus) are non-breeding winter visitors to the Brazilian coast. In 2008 and 2010, plastic items and other marine debris were found in the stomachs and intestines of 15% of 175 dead penguins collected in the Lagos Region of the state of Rio de Janeiro. One bird had its stomach perforated by a plastic straw, which may have caused its death. There are few records of penguins ingesting plastic litter, but previous studies have found similar levels of debris ingestion among Magellanic penguins stranded on the Brazilian coast (35.8% of 397 birds). The high incidence of marine debris in this species in Brazil may result at least in part from the predominance of juveniles reaching these waters, as juvenile penguins may have a broader diet than adults. It is unclear to what extent plastic ingestion affects the mortality rate in this species and whether the incidence in stranded birds reflects that in the entire population. The present study addresses the increasing impact of plastic debris on marine life. PMID:21864861

  19. Development of the Superaltricial Monk Parakeet (Aves, Psittaciformes): Embryo Staging, Growth, and Heterochronies.

    Science.gov (United States)

    Carril, Julieta; Tambussi, Claudia P

    2015-11-01

    Knowledge about the embryonic stages of birds is important in answering many questions about development and evolution. We give the first description of 41 embryological stages of the monk parakeet (Myiopsitta monachus) on the basis of external morphology and comparison with the chicken. We also provide measurements of some external morphological characters (i.e. body mass, crown-rump, beak, forelimb, and third toe lengths) and perform comparisons with other precocial and altricial birds with the aim of identifying heterochronous developmental features. The following differences in the development of characters in the monk parakeet when compared with other birds were found: (1) delay of the feathers primordia, (2) wing buds initially greater than leg buds, (3) forelimbs and hindlimbs with similar relative size, (4) retroversion of the toe IV, (5) ventral curvature of the upper jaw, (6) positive regressions between stages and beak length with acceleration and higher values and III toe lengths with deceleration and lower values in the monk parakeet compared to the chicken. The growth pattern of the monk paraket Myiopsitta monachus could be influenced by some heterochronic processes like post-displacement, acceleration and/or deceleration. Results of this research allow the standard identification of stages in different species of parrots, recognize similarities and differences between precocial (the chicken) and altricial species (Myiopsitta), and provide planning data for future studies. PMID:26267228

  20. Microanatomy and Histochemistry of the Salt Glands of the Kentish Plover, Charadrius alexandrines (Aves, Charadriidae

    Directory of Open Access Journals (Sweden)

    Bashir M. Jarrar

    2009-01-01

    Full Text Available Problem statement: Histological and histochemical investigations on the salt glands of birds are very limited. The present study was performed to characterize the microanatomy and histochemistry of the salt glands of the Kentish plover (Charadrius alexandrines. Approach: Salt glands of the bird under study were fixed, dehydrated, cleared, impregnated and blocked out by paraffin wax. Paraffin sections were utilized in histological and histochemical examinations to characterize the structure and chemical contents of these glands. Results: The Kentish plover had a well developed bilateral seromucous salt glands lie in the supraorbital depression of the frontal bone. Each gland is about 0.18 g and had lobular arrangement consisted of one cell thick secretory tubules enmeshed in tiny blood capillaries. The tubules radiate from central canals that drain in a main duct of 3-4 mm in length and opens into the external nares. The secretory tubules were lined by a single layer of principal cells and opens in intercalated ducts followed by striated ducts. The employed histochemical tests indicated that seretory tubules elaborate proteins and acid mucosubstances but are devoid of glycogen and neutral mucosubstances while the intertubular stroma showed metachromatic, alcianophilic and PAS reactivity. Conclusion/Recommendations: The results of the present study revealed that salt glands of Kentish plover are active adaptive tool of osmoregulation to control the amount of water needed by this bird. More research is needed to understand the adaptation of the seabirds to the physiological stress of the salt load.

  1. Foraging activity of the snail kite, Rostrhamus sociabilis (Aves: Accipitridae) in wetlands of southern Brazil.

    Science.gov (United States)

    Bergmann, F B; Amaral, H L C; Pinto, D P; Chivittz, C C; Tozetti, A M

    2013-05-01

    The snail kite (Rostrhamus sociabilis) is widely distributed in the American continent. Its specialised diet consists mostly of the gastropod mollusk Pomacea sp and its foraging strategy probably varies depending on the season, prey availability, and climate factors, which can be reflected in its semi-nomad behaviour. This study was aimed at examining the hunting strategy of the snail kite, and its association with climate factors and habitat heterogeneity. Direct observations of birds between January 2010 and March 2011 in southernmost Brazil revealed that hunting was still the predominant foraging strategy (79% of records) to capture mollusks. Despite morphological specialisations to extract mollusks from the shells, the handling time (average = 92.4 s) was twice as much the time between prey search and capture (average = 55 s). The increase in the number of mollusks ingested apparently occurs when the resting time on perches or any other substrates near the hunting sites decreases between successive unsuccessful attempts. The correlation between the number of consumed preys and the climatic variables examined was low. Regarding habitat heterogeneity, our findings suggest that birds forage preferentially in marshes with low vegetation, which may increase the access to mollusks. The hunting efficiency of the snail kite was high (76 % successful attempts) compared to those of other birds of prey. PMID:23917551

  2. Impact of wind turbines on birds

    Energy Technology Data Exchange (ETDEWEB)

    Clausager, I. [National Environmental Research Institute, Ronde (Denmark); Nohr, H. [Ornis Consult Ltd., Copenhagen (Denmark)

    1996-12-31

    The paper is a review of the present knowledge on impacts of wind turbines on birds, requested by the Danish Ministry of the Environment and Energy. The main conclusions of the review are, that in nearly all the studies so far the numbers of birds recorded colliding with wind turbines have been limited. Some studies indicate that stationary (breeding) birds inside the wind turbine area in the short run habituate to wind turbines, especially the noise and visual impacts, and that the risk for collision becomes low. However, some of the few more long term studies indicate that a negative impact may occur in later generations of breeding birds. In some studies a disturbance effect on bird species, which temporarily stay inside a wind turbine area in order to forage or rest, is observed. The degree of impact is species-specific. An effect is typically recorded inside a zone of up to 250-800 m, with geese and waders as the most sensitive groups of birds. (author)

  3. Are there optimal densities for prairie birds?

    Science.gov (United States)

    Skagen, S.K.; Adams, A.A.Y.

    2010-01-01

    The major forces of food and predation shape fitness-enhancing decisions of birds at all stages of their life cycles. During the breeding season, birds can minimize nest loss due to predation by selecting sites with a lower probability of predation. To understand the environmental and social aspects and consequences of breedingsite selection in prairie birds, we explored variation in nest-survival patterns of the Lark Bunting (Calamospiza melanocorys) in the shortgrass prairie region of North America. Over four breeding seasons, we documented the survival of 405 nests, conducted 60 surveys to estimate bird densities, and measured several vegetative features to describe habitat structure in 24 randomly selected study plots. Nest survival varied with the buntings' density as described by a quadratic polynomial, increasing with density below 1.5 birds ha-1 and decreasing with density between 1.5 and 3 birds ha-1, suggesting that an optimal range of densities favors reproductive success of the Lark Bunting, which nests semi-colonially. Nest survival also increased with increasing vegetation structure of study plots and varied with age of the nest, increasing during early incubation and late in the nestling stage and declining slightly from mid-incubation to the middle of the nestling period. The existence of an optimal range of densities in this semi-colonial species can be elucidated by the "commodity-selection hypothesis" at low densities and density dependence at high densities. ?? The Cooper Ornithological Society 2010.

  4. Chlamydophila psittaci infection of birds and humans

    Directory of Open Access Journals (Sweden)

    Bülent Baş

    2015-04-01

    seen in infected birds. Transmission of infection to humans occurs through inhalation or direct contact and transmission through bird bites or human-to-human is rare. C. psittaci usually leads to the systemic infection associated with pneumonia in humans. In recent years, PCR based molecular methods are used as well as serological methods such as ELISA, CFT, MIF in diagnosis. Both of infected birds and humans, tetracyclines and macrolides are preferred for treatment of infection. In order to prevent the disease, due to there isn't any commercial vaccine for especially using in birds, applying biosafety rules is very important in terms of human health and economical aspects. Especially, veterinarians, bird breeders and dealers, poultry farmers and slaughterhouse workers are at high risk for C. psittaci infection. Due to the transmission to humans of psittacosis infection and accepting it as a potential biological weapon, it is thought to be important for public health. In this review, it is aimed to give detailed information about infection in human and birds, because it can be missed at the diagnosis, hence there is low awareness about disease and it has got variable clinical symptoms.

  5. ON CORRELATING BIRD MIGRATION TRAJECTORY WITH CLIMATE CHANGES

    OpenAIRE

    Oleinik, Janaina; de Macedo, Jose Antonio Fernandes; Yuanjian, Wang Zufferey

    2009-01-01

    Climate changes are expected to affect bird migration in several aspects including timing changes, breeding and migration orientation. The correlation analysis of several climate conditions (e.g. temperature, wind, humidity, etc) and bird migration trajectory is the key for explaining bird behavior during migration. Moreover, the resulting correlation can be used for predicting new bird behavior according to climate changes. In this paper we propose an integrated solution for correlating bird...

  6. The Flight of Birds and Other Animals

    Directory of Open Access Journals (Sweden)

    Colin J. Pennycuick

    2015-09-01

    Full Text Available Methods of observing birds in flight now include training them to fly under known conditions in wind tunnels, and fitting free-flying birds with data loggers, that are either retrieved or read remotely via satellite links. The performance that comes to light depends on the known limitations of the materials from which they are made, and the conditions in which the birds live. Bird glide polars can be obtained by training birds to glide in a tilting wind tunnel. Translating these curves to power required from the flight muscles in level flight requires drag coefficients to be measured, which unfortunately does not work with bird bodies, because the flow is always fully detached. The drag of bodies in level flight can be determined by observing wingbeat frequency, and shows CD values around 0.08 in small birds, down to 0.06 in small waders specialised for efficient migration. Lift coefficients are up to 1.6 in gliding, or 1.8 for short, temporary glides. In-flight measurements can be used to calculate power curves for birds in level flight, and this has been applied to migrating geese in detail. These typically achieve lift:drag ratios around 15, including allowances for stops, as against 19 for continuous powered flight. The same calculations, applied to Pacific Black-tailed Godwits which start with fat fractions up to 0.55 at departure, show that such birds not only cross the Pacific to New Zealand, but have enough fuel in hand to reach the South Pole if that were necessary. This performance depends on the “dual fuel” arrangements of these migrants, whereby they use fat as their main fuel, and supplement this by extra fuel from burning the engine (flight muscles, as less power is needed later in the flight. The accuracy of these power curves has never been checked, although provision for stopping the bird, and making these checks at regular intervals during a simulated flight was built into the original design of the Lund wind tunnel. The

  7. History, distribution, and seasonal abundance of the Least Tern Sternula antillarum (Aves: Charadriiformes: Sternidae in Brazil

    Directory of Open Access Journals (Sweden)

    Caio J. Carlos

    2013-04-01

    Full Text Available We review existing data on the distribution of the Least Tern, Sternula antillarum along the Brazilian coast, based on the literature and museum specimens, and present results of a year-long study (October 2008 to September 2009 on the seasonal abundance of this species on a large tidal flat area, Cajuais Bank, in the State of Ceará, north-eastern Brazil. We evaluate whether the observed variation in the abundance of terns is due to the occurrence of an undocumented breeding colony, or alternatively, whether it results from an influx of migrants from the Northern Hemisphere. The recovery of historical data revealed that all literature references on the distribution of birds in the Americas, published up to the late 1990s include Brazil in the non-breeding range of the Least Tern. This inclusion is based on a few, old (late 19th and early 20th centuries museum specimens, all of which have been collected on the northern and north-eastern coasts of this country'. From the late 1980s, birds continued to be occasionally recorded along the coastline, running from the State of Amapá (01°N up to the State of Bahia (10°S, with records of single individuals in south-eastern and southern Brazil. An alleged record from Rocas Atoll, 260 km off the Brazilian mainland, might tentatively refer to the Old World Little Tern S. albifrons. At Cajuais Bank, Least Terns occurred from October 2008 to April 2009, and in September 2009. The highest numbers (> 800 individuals were recorded in January-February (Southern Hemisphere's summer. The species was observed in rather small numbers (< 30 in March-April (early-mid Southern Hemisphere fall and in September (early Southern Hemisphere spring, being absent from the area in May-August (Southern Hemisphere's fall and winter. In October-December 2008 (Southern Hemisphere's spring, and September 2009 (early Southern Hemisphere's summer, no birds were in breeding plumage. In January, about 32% of the birds were in

  8. Foraging behavior of tyrant flycatchers (Aves, Tyrannidae in Brazil Comportamento de forrageamento de tiranídeos (Aves, Tyrannidae no Brasil

    Directory of Open Access Journals (Sweden)

    Vagner de A. Gabriel

    2005-12-01

    as seis espécies acima citadas três grupos de altura de forrageamento puderam ser discernidos: F. nengeta e M. rixosa forrageiam no chão, A. leucocephala e P. sulphuratus ocupam um estrato médio e T. melancholicus e M. similis formam um terceiro grupo e geralmente atacam suas presas a partir de poleiros situados a 3 m ou mais do chão. Com exceção de P. sulphuratus, que apresentou o tempo de procura mais longo, as outras cinco espécies não diferiram nesse aspecto. Três grupos foram também discernidos em relação à distância de ataque: F. nengeta e M. rixosa atacam presas próximas (< 2 m a eles, A. leucocephala, P. sulphuratus e M. similis formam um grupo de média distância (3-4 m e T. melancholicus apresentou as mais longas distâncias de ataque (até 12 m. As aves diferiram em alguns aspectos do ângulo de ataque que, juntamente com diferenças sutis em outros aspectos do comportamento de forrageamento podem levar a diferenças importantes na seleção de presas.

  9. Chernobyl birds have smaller brains.

    Directory of Open Access Journals (Sweden)

    Anders Pape Møller

    Full Text Available BACKGROUND: Animals living in areas contaminated by radioactive material from Chernobyl suffer from increased oxidative stress and low levels of antioxidants. Therefore, normal development of the nervous system is jeopardized as reflected by high frequencies of developmental errors, reduced brain size and impaired cognitive abilities in humans. Alternatively, associations between psychological effects and radiation have been attributed to post-traumatic stress in humans. METHODOLOGY/PRINCIPAL FINDING: Here we used an extensive sample of 550 birds belonging to 48 species to test the prediction that even in the absence of post-traumatic stress, there is a negative association between relative brain size and level of background radiation. We found a negative association between brain size as reflected by external head volume and level of background radiation, independent of structural body size and body mass. The observed reduction in brain size in relation to background radiation amounted to 5% across the range of almost a factor 5,000 in radiation level. Species differed significantly in reduction in brain size with increasing background radiation, and brain size was the only morphological character that showed a negative relationship with radiation. Brain size was significantly smaller in yearlings than in older individuals. CONCLUSIONS/SIGNIFICANCE: Low dose radiation can have significant effects on normal brain development as reflected by brain size and therefore potentially cognitive ability. The fact that brain size was smaller in yearlings than in older individuals implies that there was significant directional selection on brain size with individuals with larger brains experiencing a viability advantage.

  10. Dental Disparity and Ecological Stability in Bird-like Dinosaurs prior to the End-Cretaceous Mass Extinction.

    Science.gov (United States)

    Larson, Derek W; Brown, Caleb M; Evans, David C

    2016-05-23

    The causes, rate, and selectivity of the end-Cretaceous mass extinction continue to be highly debated [1-5]. Extinction patterns in small, feathered maniraptoran dinosaurs (including birds) are important for understanding extant biodiversity and present an enigma considering the survival of crown group birds (Neornithes) and the extinction of their close kin across the end-Cretaceous boundary [6]. Because of the patchy Cretaceous fossil record of small maniraptorans [7-12], this important transition has not been closely examined in this group. Here, we test the hypothesis that morphological disparity in bird-like dinosaurs was decreasing leading up to the end-Cretaceous mass extinction, as has been hypothesized in some dinosaurs [13, 14]. To test this, we examined tooth morphology, an ecological indicator in fossil reptiles [15-19], from over 3,100 maniraptoran teeth from four groups (Troodontidae, Dromaeosauridae, Richardoestesia, and cf. Aves) across the last 18 million years of the Cretaceous. We demonstrate that tooth disparity, a proxy for variation in feeding ecology, shows no significant decline leading up to the extinction event within any of the groups. Tooth morphospace occupation also remains static over this time interval except for increased size during the early Maastrichtian. Our data provide strong support that extinction within this group occurred suddenly after a prolonged period of ecological stability. To explain this sudden extinction of toothed maniraptorans and the survival of Neornithes, we propose that diet may have been an extinction filter and suggest that granivory associated with an edentulous beak was a key ecological trait in the survival of some lineages. PMID:27112293

  11. 77 FR 17353 - Migratory Bird Subsistence Harvest in Alaska; Harvest Regulations for Migratory Birds in Alaska...

    Science.gov (United States)

    2012-03-26

    ... FR 68264) a proposed rule that provided our proposed migratory bird subsistence harvest regulations... Federal Register a proposed rule (76 FR 68264) to establish spring and summer migratory bird subsistence... Register on August 16, 2002 (67 FR 53511) and most recently on March 29, 2011 (76 FR 17353). Recent...

  12. 75 FR 29917 - Migratory Bird Permits; Changes in the Regulations Governing Migratory Bird Rehabilitation

    Science.gov (United States)

    2010-05-28

    ... FR 61123) to establish regulations for the issuance of permits to rehabilitate migratory birds in the... Relations with Native American Tribal Governments'' (59 FR 22951), Executive Order 13175, and 512 DM 2, we... Fish and Wildlife Service 50 CFR Part 21 RIN 1018-AX09 Migratory Bird Permits; Changes in...

  13. A sonic net excludes birds from an airfield: implications for reducing bird strike and crop losses.

    Science.gov (United States)

    Swaddle, John P; Moseley, Dana L; Hinders, Mark K; Smith, Elizabeth P

    2016-03-01

    Collisions between birds and aircraft cause billions of dollars of damages annually to civil, commercial, and military aviation. Yet technology to reduce bird strike is not generally effective, especially over longer time periods. Previous information from our lab indicated that filling an area with acoustic noise, which masks important communication channels for birds, can displace European Starlings (Sturnus vulgaris) from food sources. Here we deployed a spatially controlled noise (termed a "sonic net"), designed to overlap with the frequency range of bird vocalizations, at an airfield. By conducting point counts, we monitored the presence of birds for four weeks before deployment of our sonic net, and for four weeks during deployment. We found an 82% reduction in bird presence in the sonic net area compared with change in the reference areas. This effect was as strong in the fourth week of exposure as in the first week. We also calculated the potential costs avoided resulting from this exclusion. We propose that spatially controlled acoustic manipulations that mask auditory communication for birds may be an effective long term and fairly benign way of excluding problem birds from areas of socioeconomic importance, such as airfields, agricultural sites, and commercial properties.

  14. 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.

  15. Avian influenza: Eco-epidemiological aspects of the virus in its natural hosts, the migratory waterfowls Influenza aviar: Aspectos ecoepidemiológicos del virus en su hospedero natural, las aves acuáticas migratorias

    Directory of Open Access Journals (Sweden)

    MARICELA MONTALVO-CORRAL

    2010-12-01

    Full Text Available Avian influenza viruses produce mainly respiratory and intestinal diseases. Their relevance in the generation of pandemic strains has led to a large amount of research to understand their distribution in nature, as well as the relations that become established for the effective transmission among different hosts. Waterfowl have been recognized as their natural reservoir and they play an important role in the propagation and generation of the diversity of these viruses. The emergence of new influenza viruses with pandemic potential among the human population (H5N1 of avian origin or recombinant H1N1 with avian segments point our lack of information on many aspects of the ecology and epidemiology of these viruses in their natural hosts to enable the implementation of more effective prevention and control measures. In this review, we attempt to make a critical essay on the current state of knowledge on the biotic and abiotic factors that influence the ecology and epidemiology of the influenza A viruses in wild birds.Los virus influenza ocasionan enfermedades respiratorias e intestinales. Su importancia en la generación de cepas pandémicas ha conducido a la realización de intensa investigación científica para entender y conocer su distribución en la naturaleza, así como las relaciones que se establecen para la transmisión efectiva entre diferentes hospederos. Las aves acuáticas principalmente del orden Anseriformes, se han reconocido como el reservorio de estos virus y tienen una participación crucial en la propagación y generación de diversidad de estos virus. La emergencia de nuevos virus influenza con potencial pandémico entre la población humana (H5N1 de origen aviar y el actual virus pandémico H1N1 que presenta segmentos aviares, resalta la falta de información sobre muchos aspectos de la ecología y epidemiología de estos virus en sus hospederos naturales, que permitan la implementación de medidas más efectivas de prevenci

  16. Enhancing bird banding information sharing across the western hemishpere

    Science.gov (United States)

    Rojo, A.; Berlanga, H.; Howes, L.; Tomosy, M.

    2007-01-01

    Bird banding and marking provide indispensable tools for ornithological research, management, and conservation of migratory birds and their habitats along migratory routes, breeding and non-breeding grounds. With the growing interest in international coordination of tracking bird movements, coordination amongst developing and existing programs is essential for effective data management. The North American Bird Banding Program (Canadian Bird Banding Office and U.S. Bird Banding Laboratory and the Mexican government) has been working to enhance collaboration with other Western Hemisphere countries to establish a voluntary bird banding communication network. This network addresses challenges, such as: demonstrating how sharing banding expertise and information management can support the stewardship of Western Hemisphere migratory birds, ensuring that valuable banding and encounter data are captured and shared. With increasing numbers of international scientific and conservation initiatives, bird banding and marking programs must provide essential international coordination functions as well as support local activities by facilitating access to bands, training, data management and encounter reporting.

  17. Comparing aerodynamic efficiency in birds and bats suggests better flight performance in birds.

    Directory of Open Access Journals (Sweden)

    Florian T Muijres

    Full Text Available Flight is one of the energetically most costly activities in the animal kingdom, suggesting that natural selection should work to optimize flight performance. The similar size and flight speed of birds and bats may therefore suggest convergent aerodynamic performance; alternatively, flight performance could be restricted by phylogenetic constraints. We test which of these scenarios fit to two measures of aerodynamic flight efficiency in two passerine bird species and two New World leaf-nosed bat species. Using time-resolved particle image velocimetry measurements of the wake of the animals flying in a wind tunnel, we derived the span efficiency, a metric for the efficiency of generating lift, and the lift-to-drag ratio, a metric for mechanical energetic flight efficiency. We show that the birds significantly outperform the bats in both metrics, which we ascribe to variation in aerodynamic function of body and wing upstroke: Bird bodies generated relatively more lift than bat bodies, resulting in a more uniform spanwise lift distribution and higher span efficiency. A likely explanation would be that the bat ears and nose leaf, associated with echolocation, disturb the flow over the body. During the upstroke, the birds retract their wings to make them aerodynamically inactive, while the membranous bat wings generate thrust and negative lift. Despite the differences in performance, the wake morphology of both birds and bats resemble the optimal wake for their respective lift-to-drag ratio regimes. This suggests that evolution has optimized performance relative to the respective conditions of birds and bats, but that maximum performance is possibly limited by phylogenetic constraints. Although ecological differences between birds and bats are subjected to many conspiring variables, the different aerodynamic flight efficiency for the bird and bat species studied here may help explain why birds typically fly faster, migrate more frequently and migrate

  18. Water depth selection during foraging and efficiency in prey capture by the egrets Casmerodius albus and Egretta thula (Aves, Ardeidae in an urban lagoon in Rio de Janeiro State, Brazil Seleção de profundidade da água durante o forrageamento e eficiência na captura de presas por Casmerodius albus e Egretta thula (Aves, Ardeidae em uma lagoa urbana no Estado do Rio de Janeiro, Brasil

    Directory of Open Access Journals (Sweden)

    Aline B. Moreno

    2005-03-01

    Full Text Available This study aimed to evaluate the water depth selection during foraging, the efficiency in prey capture, and the food items captured by Casmerodius albus (Linnaeus, 1758 and Egretta thula (Molina, 1782. The work was conducted at an urban lagoon, Lagoa Rodrigo de Freitas, Rio de Janeiro. Four transects were made each month (two in the morning and two in the afternoon for six months. When the birds were detected foraging, the water depth and the types of prey captured were recorded. There was no significant relationship between the foraging efficiencies of the two species. However, they differed in relation to the water depth when foraging, and also in the food items captured. Casmerodius albus captured mainly fishes while Egretta thula captured mainly invertebrates. The results suggest that the differences in water depth when foraging and the food items captured allow a differential use of the food resources available by C. albus and E. thula at Lagoa Rodrigo de Freitas.Este estudo teve o objetivo de avaliar a seleção de profundidade durante o forrageamento, a eficiência na captura de presas e os itens alimentares capturados por Casmerodius albus (Linnaeus, 1758 e Egretta thula (Molina, 1782. O trabalho foi realizado em uma lagoa urbana, Lagoa Rodrigo de Freitas. Durante seis meses foram realizadas quatro transecções (duas de manhã e duas à tarde. Quando as aves foram avistadas forrageando, foram registradas a profundidade da água e o tipo de presa capturada. Não foi encontrada relação estatisticamente significativa entre a eficiência de forrageamento para as duas espécies de aves. Entretanto, as espécies diferiram significativamente em relação à profundidade da água durante o forrageamento e também em relação aos itens alimentares capturados. Casmerodius albus capturou principalmente peixes, enquanto E. thula capturou principalmente invertebrados. Os resultados sugerem que diferenças na profundidade da água durante o

  19. An introduction to Jade Bird Project

    Institute of Scientific and Technical Information of China (English)

    2001-01-01

    @@Jade Bird, a lucky and divine bird in ancient Chinese mythology, is a message deliverer in the world of gods. She serves goddess Xi Wang Mu (Western Queen), bringing her commands and messages to other gods. With 3 feet, black eyes and red head, this beautiful bird is viewed as a lucky symbol in China. There are a lot of tales about her in the folklore and literature. This is why Jade Bird was chosen as the name of the largest project for research on software technology in China. Jade Bird (JB) project, started in 1983 in the period of the 6th State Five_year Plan, is a key Sci.&Tech. project of the State. It has lasted more than 15 years through the 7th, 8th, and 9th State Five_year Plan periods and is the only software project getting continual support from the government. More than 20 institutions, 300 researchers and developers are involved in the development of JB Project. Prof. Yang Fuqing from Peking University, a member of the Chinese Academy of Sciences, is the leader and chief scientist of the project.

  20. Osedax borings in fossil marine bird bones

    Science.gov (United States)

    Kiel, Steffen; Kahl, Wolf-Achim; Goedert, James L.

    2011-01-01

    The bone-eating marine annelid Osedax consumes mainly whale bones on the deep-sea floor, but recent colonization experiments with cow bones and molecular age estimates suggesting a possible Cretaceous origin of Osedax indicate that this worm might be able grow on a wider range of substrates. The suggested Cretaceous origin was thought to imply that Osedax could colonize marine reptile or fish bones, but there is currently no evidence that Osedax consumes bones other than those of mammals. We provide the first evidence that Osedax was, and most likely still is, able to consume non-mammalian bones, namely bird bones. Borings resembling those produced by living Osedax were found in bones of early Oligocene marine flightless diving birds (family Plotopteridae). The species that produced these boreholes had a branching filiform root that grew to a length of at least 3 mm, and lived in densities of up to 40 individuals per square centimeter. The inclusion of bird bones into the diet of Osedax has interesting implications for the recent suggestion of a Cretaceous origin of this worm because marine birds have existed continuously since the Cretaceous. Bird bones could have enabled this worm to survive times in the Earth's history when large marine vertebrates other than fish were rare, specifically after the disappearance of large marine reptiles at the end-Cretaceous mass extinction event and before the rise of whales in the Eocene.

  1. Comparing bird and human soaring strategies

    CERN Document Server

    Akos, Zsuzsa; Vicsek, Tamas; 10.1073/pnas.0707711105

    2009-01-01

    Gliding saves much energy, and to make large distances using only this form of flight represents a great challenge for both birds and people. The solution is to make use of the so-called thermals, which are localized, warmer regions in the atmosphere moving upwards with a speed exceeding the descent rate of bird and plane. Whereas birds use this technique mainly for foraging, humans do it as a sporting activity. Thermalling involves efficient optimization including the skilful localization of thermals, trying to guess the most favorable route, estimating the best descending rate, etc. In this study, we address the question whether there are any analogies between the solutions birds and humans find to handle the above task. High-resolution track logs were taken from thermalling falcons and paraglider pilots to determine the essential parameters of the flight patterns. We find that there are relevant common features in the ways birds and humans use thermals. In particular, falcons seem to reproduce the MacCread...

  2. Ultra-Rapid Vision in Birds.

    Science.gov (United States)

    Boström, Jannika E; Dimitrova, Marina; Canton, Cindy; Håstad, Olle; Qvarnström, Anna; Ödeen, Anders

    2016-01-01

    Flying animals need to accurately detect, identify and track fast-moving objects and these behavioral requirements are likely to strongly select for abilities to resolve visual detail in time. However, evidence of highly elevated temporal acuity relative to non-flying animals has so far been confined to insects while it has been missing in birds. With behavioral experiments on three wild passerine species, blue tits, collared and pied flycatchers, we demonstrate temporal acuities of vision far exceeding predictions based on the sizes and metabolic rates of these birds. This implies a history of strong natural selection on temporal resolution. These birds can resolve alternating light-dark cycles at up to 145 Hz (average: 129, 127 and 137, respectively), which is ca. 50 Hz over the highest frequency shown in any other vertebrate. We argue that rapid vision should confer a selective advantage in many bird species that are ecologically similar to the three species examined in our study. Thus, rapid vision may be a more typical avian trait than the famously sharp vision found in birds of prey. PMID:26990087

  3. Ultra-Rapid Vision in Birds

    Science.gov (United States)

    Boström, Jannika E.; Dimitrova, Marina; Canton, Cindy; Håstad, Olle; Qvarnström, Anna; Ödeen, Anders

    2016-01-01

    Flying animals need to accurately detect, identify and track fast-moving objects and these behavioral requirements are likely to strongly select for abilities to resolve visual detail in time. However, evidence of highly elevated temporal acuity relative to non-flying animals has so far been confined to insects while it has been missing in birds. With behavioral experiments on three wild passerine species, blue tits, collared and pied flycatchers, we demonstrate temporal acuities of vision far exceeding predictions based on the sizes and metabolic rates of these birds. This implies a history of strong natural selection on temporal resolution. These birds can resolve alternating light-dark cycles at up to 145 Hz (average: 129, 127 and 137, respectively), which is ca. 50 Hz over the highest frequency shown in any other vertebrate. We argue that rapid vision should confer a selective advantage in many bird species that are ecologically similar to the three species examined in our study. Thus, rapid vision may be a more typical avian trait than the famously sharp vision found in birds of prey. PMID:26990087

  4. Ultra-Rapid Vision in Birds.

    Directory of Open Access Journals (Sweden)

    Jannika E Boström

    Full Text Available Flying animals need to accurately detect, identify and track fast-moving objects and these behavioral requirements are likely to strongly select for abilities to resolve visual detail in time. However, evidence of highly elevated temporal acuity relative to non-flying animals has so far been confined to insects while it has been missing in birds. With behavioral experiments on three wild passerine species, blue tits, collared and pied flycatchers, we demonstrate temporal acuities of vision far exceeding predictions based on the sizes and metabolic rates of these birds. This implies a history of strong natural selection on temporal resolution. These birds can resolve alternating light-dark cycles at up to 145 Hz (average: 129, 127 and 137, respectively, which is ca. 50 Hz over the highest frequency shown in any other vertebrate. We argue that rapid vision should confer a selective advantage in many bird species that are ecologically similar to the three species examined in our study. Thus, rapid vision may be a more typical avian trait than the famously sharp vision found in birds of prey.

  5. Ultra-Rapid Vision in Birds.

    Science.gov (United States)

    Boström, Jannika E; Dimitrova, Marina; Canton, Cindy; Håstad, Olle; Qvarnström, Anna; Ödeen, Anders

    2016-01-01

    Flying animals need to accurately detect, identify and track fast-moving objects and these behavioral requirements are likely to strongly select for abilities to resolve visual detail in time. However, evidence of highly elevated temporal acuity relative to non-flying animals has so far been confined to insects while it has been missing in birds. With behavioral experiments on three wild passerine species, blue tits, collared and pied flycatchers, we demonstrate temporal acuities of vision far exceeding predictions based on the sizes and metabolic rates of these birds. This implies a history of strong natural selection on temporal resolution. These birds can resolve alternating light-dark cycles at up to 145 Hz (average: 129, 127 and 137, respectively), which is ca. 50 Hz over the highest frequency shown in any other vertebrate. We argue that rapid vision should confer a selective advantage in many bird species that are ecologically similar to the three species examined in our study. Thus, rapid vision may be a more typical avian trait than the famously sharp vision found in birds of prey.

  6. Adaptive evolution of a derived radius morphology in manakins (Aves, Pipridae) to support acrobatic display behavior.

    Science.gov (United States)

    Friscia, Anthony; Sanin, Gloria D; Lindsay, Willow R; Day, Lainy B; Schlinger, Barney A; Tan, Josh; Fuxjager, Matthew J

    2016-06-01

    The morphology of the avian skeleton is often studied in the context of adaptations for powered flight. The effects of other evolutionary forces, such as sexual selection, on avian skeletal design are unclear, even though birds produce diverse behaviors that undoubtedly require a variety of osteological modifications. Here, we investigate this issue in a family of passerine birds called manakins (Pipridae), which have evolved physically unusual and elaborate courtship displays. We report that, in species within the genus Manacus, the shaft of the radius is heavily flattened and shows substantial solidification. Past work anecdotally notes this morphology and attributes it to the species' ability to hit their wings together above their heads to produce loud mechanical sonations. Our results show that this feature is unique to Manacus compared to the other species in our study, including a variety of taxa that produce other sonations through alternate wing mechanisms. At the same time, our data reveal striking similarities across species in total radius volume and solidification. Together, this suggests that supposedly adaptive alterations in radial morphology occur within a conserved framework of a set radius volume and solidness, which in turn is likely determined by natural selection. Further allometric analyses imply that the radius is less constrained by body size and the structural demands that underlie powered flight, compared to other forelimb bones that are mostly unmodified across taxa. These results are consistent with the idea that the radius is more susceptible to selective modification by sexual selection. Overall, this study provides some of the first insight into the osteological evolution of passerine birds, as well as the way in which opposing selective forces can shape skeletal design in these species. J. Morphol. 277:766-775, 2016. © 2016 Wiley Periodicals, Inc. PMID:27027525

  7. Mitochondrial control region structure and single site heteroplasmy in the razorbill (Alca torda; Aves).

    Science.gov (United States)

    Moum, T; Bakke, I

    2001-05-01

    The primary structure of the Alca torda mitochondrial control region was determined and conserved structural features were identified based on sequence comparisons to other bird species. In a population survey using control region analysis, five individuals were found to possess heteroplasmic point mutations at the variable 5' end of the control region. The pattern of variable nucleotide positions among individuals was compared to the distribution of heteroplasmic sites and the heteroplasmic condition was further characterised by a cloning procedure applied to two individuals which harboured one and two heteroplasmic point mutations, respectively. These results are in support of recent evidence that single site heteroplasmy may be more common than previously thought.

  8. Fruit consumption by Colaptes campestris (Aves, Picidae at Emas National Park, Brazil

    Directory of Open Access Journals (Sweden)

    Dárius Pukenis Tubelis

    2007-12-01

    Full Text Available Although woodpeckers are primarily insectivorous birds, some species feed on fruits and flowers occasionally or regularly. Most records of fruit consumption by Colaptes species have involved C. melanochloros; there have been few records of C. campestris. This study aimed to report on frugivory by C. campestris at Emas National Park, Goias. In early March 2007, two individuals were seen feeding on fruits of Palicourea rigida (Rubiaceae in a patch of ‘campo sujo’ vegetation. These are the first records of consumption of fruits of native species by Colaptes campestris in Cerrado.

  9. Population ecology of a phthirapteran occurring on the common Baya (Ploceus philippinus) (Ploceidae: Passeriformes: Aves)

    OpenAIRE

    Arya, Gaurav; Bansal, Nayanci; Ahmad, Aftab; Gupta, Nidhi; Saxena, Arun Kumar

    2011-01-01

    One hundred common Bayas (Ploceus philippinus) were examined for their ectoparasites, during April 2006 to December 2008 in the Rampur district of India (28°49'12"N 79°1'11"E). Seventy-four animals were found infested (mean intensity 13.97, sample mean abundance 10.3, range of infestation 1-45) with an ischnoceran louse, Brueelia plocea. The frequency distribution pattern of the louse on the aforesaid bird was aggregated but did not conform to the negative binomial model. ...

  10. Study of the karyotype of Oryzoborus maximiliani (Passeriformes - Aves) using young feather pulp cultures

    OpenAIRE

    Beatriz Goldschmidt; Denise Monnerat Nogueira; Katia Pacheco Araujo Silva; Lucia Moreno de Souza

    2000-01-01

    The investigation of the karyotype of Oryzoborus maximiliani in living birds utilizing young feather pulp culture is described. The species karyotype was established as 2n = 72 with unequivocal identification of the sexual chromosome pair. Evolutionary considerations are raised.Foram estudados citogeneticamente vinte exemplares da espécie Oryzoborus maximiliani provenientes de criatórios do Estado do Rio de Janeiro. Foi aplicada a técnica de cultura de curta duração de polpa de penas jovens, ...

  11. Behavior of emu bird (Dromaius novaehollandiae

    Directory of Open Access Journals (Sweden)

    V. R. Patodkar

    Full Text Available Emu is the second largest living bird of world belonging to order Ratite. This order is of flightless birds with flat breast bone and it includes emu, ostrich, rhea, cassowary and kiwi. Emus are reared commercially in many parts of the world for their meat, oil, skin and feathers, which are of high economic value. The anatomical and physiological features of these birds appear to be suitable for temperate and tropical climatic conditions. Emu is newly introduced species in India. Although emu farming is considered to be economical, we have to study the behavior of emus to increase the profitability by providing housing, feeding and breeding facilities more or less same as that of in wild condition during their rearing in captivity and we will have to carry out comparative study of behavior in captivity as well as in wild condition. [Vet World 2009; 2(11.000: 439-440

  12. Light-Activated Magnetic Compass in Birds

    DEFF Research Database (Denmark)

    Solov'yov, Ilia; Greiner, Walter

    2013-01-01

    Migrating birds fly thousand miles without having a map, or a GPS unit. But they may carry their own sensitive navigational tool, which allows them "see" the Earth’s magnetic field. Here we review the important physical and chemical constraints on a possible compass sensor and discuss the suggest......Migrating birds fly thousand miles without having a map, or a GPS unit. But they may carry their own sensitive navigational tool, which allows them "see" the Earth’s magnetic field. Here we review the important physical and chemical constraints on a possible compass sensor and discuss...... the suggestion that radical pairs in a photoreceptor cryptochrome might provide a biological realization for a magnetic compass. Finally, we review the current evidence supporting a role for radical pair reactions in the magnetic compass of birds....

  13. Phase Transitions in Models of Bird Flocking

    CERN Document Server

    Christodoulidi, H; Bountis, T

    2013-01-01

    The aim of the present paper is to elucidate the transition from collective to random behavior exhibited by various mathematical models of bird flocking. In particular, we compare Vicsek's model [Viscek et al., Phys. Rev. Lett. 75, 1226 -- 1229 (1995)] with one based on topological considerations. The latter model is found to exhibit a first order phase transition from flocking to decoherence, as the 'noise parameter' of the problem is increased, whereas Viscek's model gives a second order transition. Refining the topological model in such a way that birds are influenced mostly by the birds in front of them, less by the ones at their sides and not at all by those behind them (because they do not see them), we find a behavior that lies in between the two models. Finally, we propose a novel mechanism for preserving the flock's cohesion, without imposing artificial boundary conditions or attracting forces.

  14. Chlamydia psittaci in birds of prey, Sweden

    Directory of Open Access Journals (Sweden)

    Maria Blomqvist

    2012-05-01

    Full Text Available Background: Chlamydia psittaci is an intracellular bacterium primarily causing respiratory diseases in birds but may also be transmitted to other animals, including humans. The prevalence of the pathogen in wild birds in Sweden is largely unknown. Methods: DNA was extracted from cloacae swabs and screened for C. psittaci by using a 23S rRNA gene PCR assay. Partial 16S rRNA and ompA gene fragments were sequence determined and phylogenies were analysed by the neighbour-joining method. Results and conclusion: The C. psittaci prevalence was 1.3% in 319 Peregrine Falcons and White-tailed Sea Eagles, vulnerable top-predators in Sweden. 16S rRNA and ompA gene analysis showed that novel Chlamydia species, as well as novel C. psittaci strains, are to be found among wild birds.

  15. The physiological basis of bird flight.

    Science.gov (United States)

    Butler, Patrick J

    2016-09-26

    Flapping flight is energetically more costly than running, although it is less costly to fly a given body mass a given distance per unit time than it is for a similar mass to run the same distance per unit time. This is mainly because birds can fly faster than they can run. Oxygen transfer and transport are enhanced in migrating birds compared with those in non-migrators: at the gas-exchange regions of the lungs the effective area is greater and the diffusion distance smaller. Also, migrating birds have larger hearts and haemoglobin concentrations in the blood, and capillary density in the flight muscles tends to be higher. Species like bar-headed geese migrate at high altitudes, where the availability of oxygen is reduced and the energy cost of flapping flight increased compared with those at sea level. Physiological adaptations to these conditions include haemoglobin with a higher affinity for oxygen than that in lowland birds, a greater effective ventilation of the gas-exchange surface of the lungs and a greater capillary-to-muscle fibre ratio. Migrating birds use fatty acids as their source of energy, so they have to be transported at a sufficient rate to meet the high demand. Since fatty acids are insoluble in water, birds maintain high concentrations of fatty acid-binding proteins to transport fatty acids across the cell membrane and within the cytoplasm. The concentrations of these proteins, together with that of a key enzyme in the β-oxidation of fatty acids, increase before migration.This article is part of the themed issue 'Moving in a moving medium: new perspectives on flight'.

  16. Multidrug resistant yeasts in synanthropic wild birds

    Directory of Open Access Journals (Sweden)

    Somanath Sushela

    2010-03-01

    Full Text Available Abstract Background The aim of this study was to investigate the presence of multidrug resistant yeasts in the faeces of synanthropic wild birds from the Bangsar suburb of Kuala Lumpur. Methods Species characterisations of yeast isolates and determinations of antimycotic susceptibility profiles were undertaken using the commercial characterization kit, Integral System Yeasts Plus (Liofilchem, Italy. Results Fourteen species of yeasts were detected in the bird faecal samples.Candida albicans was present in 28.89% of bird faecal samples, Candida krusei (13.33%, Candida tropicalis (4.44%, Candida glabrata (4.44%, Candida parapsilosis (2.22%, Candida lambica (2.22%, Candida stellatoidea (2.22%, Candida rugosa (2.22% and Candida lusitaniae (2.22%. Amongst the non-candidal yeast isolates, Cryptococcus laurentii was present in 6.67% of bird faecal samples, Cryptococcus uniguttulatus (4.44%, Saccharomyces cerevisiae (4.44%, Trichosporon pullulans (2.22%, Trichosporon pullulans/Cryptococcus albidus (8.89% and Rhodotorula rubra/Rhodotorula glutinis (4.44%. Of the isolated yeasts, 18.1% (or 26/144 were found to be resistant to all 11 antimycotic agents they were tested against i.e. Nystatin, Amphotericin B, Flucytosine, Econazole, Ketoconazole, Clotrimazole, Miconazole, Itraconazole, Voriconazole, Fluconazole 16 and Fluconazole 64. 45.8% (or 66/144 of the bird faecal yeast isolates were resistant to four or more of the 11 antimycotic agents they were tested against. Conclusions This finding is of public health significance as these synanthropic wild birds may be reservoirs for transmission of drug resistant yeast infections to humans.

  17. Traffic effects on bird counts on North American Breeding Bird Survey routes

    Science.gov (United States)

    Griffith, Emily H.; Sauer, John R.; Royle, J. Andrew

    2010-01-01

    The North American Breeding Bird Survey (BBS) is an annual roadside survey used to estimate population change in >420 species of birds that breed in North America. Roadside sampling has been criticized, in part because traffic noise can interfere with bird counts. Since 1997, data have been collected on the numbers of vehicles that pass during counts at each stop. We assessed the effect of traffic by modeling total vehicles as a covariate of counts in hierarchical Poisson regression models used to estimate population change. We selected species for analysis that represent birds detected at low and high abundance and birds with songs of low and high frequencies. Increases in vehicle counts were associated with decreases in bird counts in most of the species examined. The size and direction of these effects remained relatively constant between two alternative models that we analyzed. Although this analysis indicated only a small effect of incorporating traffic effects when modeling roadside counts of birds, we suggest that continued evaluation of changes in traffic at BBS stops should be a component of future BBS analyses.

  18. First report of an hypopus (Acari: Hypoderatidae) from a jaeger (Aves: Charadriiformes: Stercorariidae)

    Science.gov (United States)

    Pence, Danny B.; Cole, R.A.

    1995-01-01

    Thalassornectes (Alcidectes) aukletae, originally described from two species of auklets (Charadriiformes: Alcidae) from maritime eastern Russia, is reported from a third species of pelagic charadriiform (Stercorariidae), the pomarine jaeger, Stercorarius poinarinus (Temminck), from Florida. The specimens from the jaeger are slightly smaller, the genital apodeme is more heavily sclerotized, paired setae gm are twice as long and there are other minor variations in the idiosomal and leg chaetotaxy. These differences are not considered sufficient to warrant taxonomic separation at the species or subspecies level from the nominate species T. (A.) aukletae. The same hypopus occurring across different families of birds is unusual in the Hypoderatidae. The diversity in hosts from several orders of birds, low intensities of infection in the two species from Africa, low prevalences in alcids from Russia, and rarity of these hypoderatids in all surveyed hosts leads us to speculate that the true host affinities of species in the genus Thalassornectes are unknown. The alternative consideration is that these are simply uncommon species that are very host specific.

  19. Temporal variations of body mass and plumage in Arenaria interpres (Aves: Scolopacidae along the Brazilian coast

    Directory of Open Access Journals (Sweden)

    Roberta C. Rodrigues

    2009-09-01

    Full Text Available Every year, Brazil receives large flocks of nearly 40 migratory shorebirds species. The accumulation of body fat and nutrients during the summer is necessary for the long return flights of these birds and is fundamental for feather moulting and the change of their plumage. We present here an examination of the relationship between body mass and plumage change in Arenaria interpres (Linnaeus, 1758, one of those birds, over time during its wintering period on the Brazilian coast. We analyzed information collected at five traditional stopover sites along the Brazilian coast, between 1997 and 2007. During the month of September, individuals with intermediate or breeding plumage had smaller body masses as compared to other months. From October to December, adult individuals were only observed with eclipse plumage and had average body masses of approximately 100 g. In March, individuals with intermediate, eclipse and breeding plumages were recorded, but their average body mass remained at approximately 100 g. In April and May the numbers of individuals with breeding or intermediate plumage increased, and they showed significant increases in body mass at a rate of approximately 1.5 and 2.3 g per day, in the north-northeastern and south coast, respectively, leading to an average mass of 124 and 143g in these months. That is suggested to be the departure mass of A. interpres in the Brazilian north-northeastern and south coast, respectively, when starting the migration to the breeding sites.

  20. Biogeographic history of the species complex Basileuterus culicivorus (Aves, Parulidae) in the Neotropics.

    Science.gov (United States)

    Vilaça, Sibelle Torres; Santos, Fabrício Rodrigues

    2010-11-01

    The taxonomic status of Basileuterus culicivorus complex has been under debate for a long time. There are uncertainties about the relationships among recognized species (B. culicivorus and B. hypoleucus), and whether B. culicivorus can be considered as a single species. In order to elucidate the phylogenetic relationships among these species and their biogeographic history we used a broad geographic sampling from Mexico to Argentina of B. culicivorus and B. hypoleucus. Using a mitochondrial gene, a nuclear intron and microsatellites we identified highly structured groups according to their spatial distribution. The known subspecies of B. culicivorus formed monophyletic groups, except two ones from Brazil and Paraguay. Basileuterus hypoleucus sequences did not form a monophyletic clade, being more related to B. culicivorus from Brazil and Paraguay. The divergence time analysis indicated that the deep separation of the basal lineages of B. culicivorus occurred in Late Pliocene. Contrasting with the other geographically structured populations from Central and South America, the clade of birds from Brazil, Paraguay and Argentina showed a remarkably high population growth starting in the mid-Pleistocene, according to the most plausible evolutionary scenario expected for parulid birds of a range expansion directed southwards.

  1. Comparative brain morphology of Neotropical parrots (Aves, Psittaciformes) inferred from virtual 3D endocasts.

    Science.gov (United States)

    Carril, Julieta; Tambussi, Claudia Patricia; Degrange, Federico Javier; Benitez Saldivar, María Juliana; Picasso, Mariana Beatriz Julieta

    2016-08-01

    Psittaciformes are a very diverse group of non-passerine birds, with advanced cognitive abilities and highly developed locomotor and feeding behaviours. Using computed tomography and three-dimensional (3D) visualization software, the endocasts of 14 extant Neotropical parrots were reconstructed, with the aim of analysing, comparing and exploring the morphology of the brain within the clade. A 3D geomorphometric analysis was performed, and the encephalization quotient (EQ) was calculated. Brain morphology character states were traced onto a Psittaciformes tree in order to facilitate interpretation of morphological traits in a phylogenetic context. Our results indicate that: (i) there are two conspicuously distinct brain morphologies, one considered walnut type (quadrangular and wider than long) and the other rounded (narrower and rostrally tapered); (ii) Psittaciformes possess a noticeable notch between hemisphaeria that divides the bulbus olfactorius; (iii) the plesiomorphic and most frequently observed characteristics of Neotropical parrots are a rostrally tapered telencephalon in dorsal view, distinctly enlarged dorsal expansion of the eminentia sagittalis and conspicuous fissura mediana; (iv) there is a positive correlation between body mass and brain volume; (v) psittacids are characterized by high EQ values that suggest high brain volumes in relation to their body masses; and (vi) the endocranial morphology of the Psittaciformes as a whole is distinctive relative to other birds. This new knowledge of brain morphology offers much potential for further insight in paleoneurological, phylogenetic and evolutionary studies.

  2. Replacement and growth of primary feathers in captive rock pigeons, Columba livia (Aves: Columbidae

    Directory of Open Access Journals (Sweden)

    Francisco Mallet-Rodrigues

    2012-04-01

    Full Text Available The replacement and growth of 311 primary feathers of eight captive male rock pigeons, Columba livia Gmelin, 1789 were monitored daily. Feather replacement was recorded in all months, but the primaries 1 to 5 (innermost primaries were replaced mostly from September to December, whereas the primaries 6 to 10 (outermost primaries were more frequently replaced from January to August. Each primary was held in plumage from six to fifteen months, but the lifetime of the outer feathers was longer than that of the inner feathers. A new primary emerges two or three days after its predecessor has been dropped, but the primaries replacing the feathers accidentally lost during bird handling emerge only after about eight days. The average growth period of a primary ranged from 21 to 37 days, with the larger and outermost feathers exhibiting a longer growth period. A constant average growth rate of 4 to 5 mm/day was found for all primaries until the last two days of growth, when the growth rate of the feathers became progressively slower. Bilateral symmetry in the primary replacement, when the same feather is replaced simultaneously in both wings, was not significant (22.2% in the birds monitored in this study.

  3. Comparative brain morphology of Neotropical parrots (Aves, Psittaciformes) inferred from virtual 3D endocasts.

    Science.gov (United States)

    Carril, Julieta; Tambussi, Claudia Patricia; Degrange, Federico Javier; Benitez Saldivar, María Juliana; Picasso, Mariana Beatriz Julieta

    2016-08-01

    Psittaciformes are a very diverse group of non-passerine birds, with advanced cognitive abilities and highly developed locomotor and feeding behaviours. Using computed tomography and three-dimensional (3D) visualization software, the endocasts of 14 extant Neotropical parrots were reconstructed, with the aim of analysing, comparing and exploring the morphology of the brain within the clade. A 3D geomorphometric analysis was performed, and the encephalization quotient (EQ) was calculated. Brain morphology character states were traced onto a Psittaciformes tree in order to facilitate interpretation of morphological traits in a phylogenetic context. Our results indicate that: (i) there are two conspicuously distinct brain morphologies, one considered walnut type (quadrangular and wider than long) and the other rounded (narrower and rostrally tapered); (ii) Psittaciformes possess a noticeable notch between hemisphaeria that divides the bulbus olfactorius; (iii) the plesiomorphic and most frequently observed characteristics of Neotropical parrots are a rostrally tapered telencephalon in dorsal view, distinctly enlarged dorsal expansion of the eminentia sagittalis and conspicuous fissura mediana; (iv) there is a positive correlation between body mass and brain volume; (v) psittacids are characterized by high EQ values that suggest high brain volumes in relation to their body masses; and (vi) the endocranial morphology of the Psittaciformes as a whole is distinctive relative to other birds. This new knowledge of brain morphology offers much potential for further insight in paleoneurological, phylogenetic and evolutionary studies. PMID:26053196

  4. Interrelaciones entre hospedadores, vectores y parásitos sanguíneos en poblaciones de aves silvestres

    OpenAIRE

    Martínez de la Puente, Josué

    2009-01-01

    El parasitismo es una de las relaciones simbióticas más importantes en la naturaleza. Las aves, como la mayoría de los organismos silvestres, se encuentran con frecuencia afectadas por una enorme diversidad de parásitos, tanto endoparásitos como ectoparásitos. El estudio del parasitismo bajo un prisma ecológico-evolutivo es una de las principales vías de investigación mundial en el campo de la biología evolutiva por la importancia de estos organismos parásitos en la evolución de sus hospedado...

  5. Taxiado de aves en el encinar de Villoria de Orbigo (León), a 7 de mayo de 1953

    OpenAIRE

    Valverde Gómez, José Antonio, 1926-2003

    2008-01-01

    Taxiado de aves en el encinar de Villoria de Orbigo, en León, el 7 de mayo de 1953, que incluye a las siguientes especies: Alectoris sp. (Perdiz), Asio otus (Búho chico), Caprimulgus sp. (Chotacabras), Carduelis cannabina (Pardillo común, llamada Colorín y Acanthis cannabina por el autor), Columba livia (Paloma bravía), Corvus monedula (Grajilla, llamada Coloeus por el autor), Falco peregrinus (Halcón peregrino, también llamado Alcotán palomero), Falco tinnunculus (Cernícalo vulgar), Garrulus...

  6. Inducción de proembriones somáticos en ave del paraíso (Strelitzia reginae Banks)

    OpenAIRE

    Amaury Martín Arzate Fernández; José Luis Piña Escutia; Hilda Araceli Zavaleta Mancera

    2008-01-01

    El ave del paraíso (Strelitzia reginae Banks) es una planta ornamental que por su belleza es altamente cotizada como flor de corte. Se propaga por semilla y por división de matas, aunque ambos métodos son muy lentos. La multiplicación de plantas in vitro vía embriogénesis somática, ha sido exitosamente establecida en muchas especies ornamentales. Para S. reginae no existen reportes de su propagación mediante dicho proceso ya que presenta serios problemas de oscurecimiento de los explantes cul...

  7. La diversidad en aves como factor determinante de la interacción entre ecosistemas del departamento del Huila

    Directory of Open Access Journals (Sweden)

    Alfredo Ramos Moreno

    2012-01-01

    Full Text Available En este estudio se realizó una descripción y análisis, en primera aproximación, de la oferta en diversidad de aves en el predio La Primavera, vereda Estambul, municipio de Teruel, departamento del Huila. A partir de la información generada, se procedió a comparar los resultados obtenidos con los reportes de aves inventariadas en el estudio GEMA (2006 desarrollado por el Instituto de Investigación de Recursos Biológicos Alexander Von Humboldt, en el Corredor Biológico entre los PNN Puracé y Cueva de Los Guácharos, con el fin de determinar la relación entre estos espacios naturales a partir del concepto de interacción entre ecosistemas, entendido como las relaciones de suministro, flujo e intercambio de materiales, energía o información, que para el casoque compete al estudio se refiere al movimiento de aves de un ecosistema a otro. El predio La Primavera, ubicado en el municipio de Teruel en el occidentedel departamento del Huila, a una altitud promedio de 900 m. s. n. m., perteneciente a la zona de vida de bosque seco tropical, sirvió de sitio de trabajo para la identificación de 32 especies de aves medianteobservación visual directa y captura con redes de niebla, de las cuales hubo dos familias que resultaron comunes a los dos estudios, pertenecientes a laThraupinae (tángaras y Tyrannidae (atrapamoscas, lo cual indica su capacidad de adaptación a pisos altitudinales diferentes. Caso particular merece la especie Tangara vitriolina (tángara rastrojera, la cual está considerada casi endémica, lo que se traduce en una alta vulnerabilidad y de especial cuidado yvigilancia. Se sugiere la realización de otras valoraciones similares en sitios que permitan establecer esta conexión ecosistémica con el fin de identificar aquellas especies que presenten características comunes para ecosistemas diferentes.

  8. Las comunidades parasitarias como expresión de distinto comportamiento trófico en aves del Mar Argentino

    OpenAIRE

    Diaz, Julia Inés

    2006-01-01

    El objetivo de este trabajo es caracterizar las comunidades de helmintos de dos especies de aves marinas con marcada diferencia en su comportamiento alimenticio, teniendo en cuenta la influencia que las tramas tróficas ejercen sobre la diversidad y estructuración de las comunidades parasitarias. Se escogió como modelo de especie estenofágica al pingüino de Magallanes (Spheniscus magellanicus) y de especie eurifágica a la gaviota cocinera (Larus dominicanus). Veintisiete pingüinos y veintinuev...

  9. Diet is a major factor governing the fecal butyrate-producing community structure across Mammalia, Aves and Reptilia

    OpenAIRE

    Vital, Marius; Gao, Jiarong; Rizzo, Mike; Harrison, Tara; Tiedje, James M.

    2014-01-01

    Butyrate-producing bacteria have an important role in maintaining host health. They are well studied in human and medically associated animal models; however, much less is known for other Vertebrata. We investigated the butyrate-producing community in hindgut-fermenting Mammalia (n=38), Aves (n=8) and Reptilia (n=8) using a gene-targeted pyrosequencing approach of the terminal genes of the main butyrate-synthesis pathways, namely butyryl-CoA:acetate CoA-transferase (but) and butyrate kinase (...

  10. Contribución al conocimiento de los malófagos (Phthiraptera, Amblycera, Ischnocera de aves peruanas. Parte 1

    Directory of Open Access Journals (Sweden)

    Luis A. Gomez-Puerta

    2015-12-01

    Full Text Available En el presente trabajo se reporta nueve especies de malófagos colectados de aves peruanas. Dos malófagos Amblycera: Heteromenopon laticapitis y Menacanthus pici, así como siete malófagos Ischnocera: Alcedoffula theresae, Brueelia brunneinucha, Chelopistes meleagridis, Columbicola columbae, Paragoniocotes aratingae, Penenirmus jungens y Saemundssonia (Saemundssonia lari, fueron determinados mediante el diagnóstico morfológico. Se realiza una breve descripción de cada malófago, así como la discusión de sus hospederos y distribución.

  11. Birds and frogs in mathematics and physics

    International Nuclear Information System (INIS)

    Some scientists are birds, others are frogs. Birds fly high in the air and survey broad vistas of mathematics out to the far horizon. They delight in concepts that unify our thinking and bring together diverse problems from different parts of the landscape. Frogs live in the mud below and see only the flowers that grow nearby. They delight in the details of particular objects, and they solve problems one at a time. A brief history of mathematics and its applications in physics is presented in this article. (from the history of physics)

  12. Avian influenza surveillance of wild birds

    Science.gov (United States)

    Slota, Paul

    2007-01-01

    The President's National Strategy for Pandemic Influenza directs federal agencies to expand the surveillance of United States domestic livestock and wildlife to ensure early warning of hightly pathogenic avian influenza (HPAI) in the U.S. The immediate concern is a potential introduction of HPAI H5N1 virus into the U.S. The presidential directive resulted in the U.S. Interagency Strategic Plan for Early Detection of H5N1 Highly Pathogenic Avian Influenza in Wild Migratory Birds (referred to as the Wild Bird Surveillance Plan or the Plan).

  13. Blood protozoa of free-living birds

    Science.gov (United States)

    Herman, C.M.; McDiarmid, Archibald

    1969-01-01

    Blood protozoa were first reported from wild birds in 1884. Since then numerous surveys throughout the world have demonstrated their presence in a wide variety of hosts and localities with continuing designations of new species. Taxonomic determinations include parasites in the genera Plasmodium, Haemoproteus, Leucocytozoon, Babesia, Lankesterella and Trypanosoma. Transmission of Plasmodium by mosquitoes was demonstrated with a bird parasite before these insects were proven as vectors of human malaria. All the genera under consideration require an insect vector to complete their life-cycles and susceptible vectors have been demonstrated. Most experimental work on the blood protozoa of birds has been carried on with captive birds. An extensive volume of research has been conducted on Plasmodium because of its close similarity to malaria in man. Field studies that would provide information on the epizootiology of occurrence of these parasites in wild populations have been very limited, mainly confined to single blood film surveys. Such data are inadequate to provide an understanding of true prevalence or incidence or of factual knowledge of their impact on the wild population. Mechanisms for procuring such information are available in some cases and can be developed to fit other situations. Isodiagnosis, inoculation of blood from wild birds into susceptible captive hosts, has revealed a prevalence of over 60 % for Plasmodium in situations where microscope examination of single peripheral blood preparations yielded less than 1 %. Culture of bone marrow collected by biopsy demonstrates high prevalence of trypanosomes even when none are evident from microscopic examination of blood. Often preparations of tissues collected at necropsy reveal Leucocytozoon and Lankesterella when examination of peripheral blood gave no indication of infection. Methods developed by bird ringers provide techniques for obtaining repeat examinations of free-living birds that can yield further

  14. Towards understanding of birds magnetoreceptor mechanism

    CERN Document Server

    Solovyov, Ilia A

    2007-01-01

    In the present letter we suggest a new theoretical model for a quantitative description of the magnetoreception mechanism in birds. The considered mechanism involves two types of iron minerals (magnetite and maghemite) which were found in subcellular compartments within sensory dendrites of the upper beak of several bird species. The analysis of forces acting between the iron particles shows that the orientation of the external geomagnetic field can significantly change the probability of the mechanosensitive ion channels opening and closing. The performed theoretical analysis shows that the suggested magnetoreceptor system might be a sensitive biological magnetometer providing an essential part of the magnetic map for navigation.

  15. On the magnetoreception mechanism in birds

    DEFF Research Database (Denmark)

    Solov'yov, Ilia; Greiner, Walter

    2008-01-01

    the iron particles shows that the orientation of the external geomagnetic field can significantly change the probability of the mechanosensitive ion channels opening and closing inducing a primary receptor potential via strain-sensitive membrane channels leading to a certain bird orientation effect......The present paper discusses a mechanism of avian magnetoreception, which is based on the interaction of magnetite and maghemite micro particles, recently found in subcellular compartments within the sensory dendrites of the upper beak of several bird species. The analysis of forces acting between...

  16. Birds and frogs in mathematics and physics

    Energy Technology Data Exchange (ETDEWEB)

    Dyson, Freeman J [Institute for Advanced Study, Princeton, NJ (United States)

    2010-11-15

    Some scientists are birds, others are frogs. Birds fly high in the air and survey broad vistas of mathematics out to the far horizon. They delight in concepts that unify our thinking and bring together diverse problems from different parts of the landscape. Frogs live in the mud below and see only the flowers that grow nearby. They delight in the details of particular objects, and they solve problems one at a time. A brief history of mathematics and its applications in physics is presented in this article. (from the history of physics)

  17. Estimating the Ontogenetic Status of an Enantiornithine Bird from the Lower Barremian of El Montsec, Central Pyrenees, Spain

    Directory of Open Access Journals (Sweden)

    Buscalioni, A. D.

    2006-12-01

    Full Text Available An Enantiornithes specimen from El Montsec was initially described as an immature individual based upon qualitative traits such as its relatively large orbit and overall proportions of the skull and the postcranium. In this study we re-evaluate the precise determination of the ontogenetic stage of this individual, establishing a cross-talk among taphonomic, anatomic, and morphometric data. The exceptional preservation of the specimen has allowed pondering ontogenetic influence versus preservational bias in features like the external patterns of bone surfaces, instead of being aprioristically considered due to taphonomic alterations only. The rough texture of the periosteal bone associated with pores in the distal, proximal and mid-shaft areas of the humeral shaft, indicates a subadult stage when compared with long bones of modern birds. Forelimb proportions of embryo and juvenile Enanthiornithes are equivalent to those of adult individuals of other taxa within this clade, though this is not a reliable criterion for establishing a precise ontogenetic stage. The El Montsec specimen may be attributed a close adulthood, yet only if growth regimes in Enantiornithes are considered equivalent to those in Neornithes birds.Un ejemplar de Enantiornithes del Montsec fue inicialmente descrito como un individuo inmaduro sobre la base de caracteres cualitativos tales como su órbita relativamente grande y sus proporciones generales en cuerpo y cráneo. En este estudio se realiza una reevaluación del estado ontogenético preciso de este individuo, estableciendo una argumentación cruzada con datos tafonómicos, anatómicos y morfométricos. La preservación excepcional de este ejemplar ha permitido ponderar la influencia ontogenética versus el sesgo tafonómico en caracteres como los patrones externos de las superficies óseas, en lugar de considerarlos apriorísticamente como debidos únicamente a alteraciones tafonómicas. La textura rugosa del periostio

  18. Informe de los anillamientos de aves de la Estación Ornitológica de San Sebastián. Periodo 1997-2000

    Directory of Open Access Journals (Sweden)

    RIOFRIO AIZPURUA, J.

    2001-01-01

    Full Text Available En la presente publicación se resumen los anillamientos y recuperaciones de las aves anilladas por la Estación Ornitológica de San Sebastián entre los años 1997 y 2000. En este lapso de tiempo han sido anilladas 9.423 aves pertenecientes a 125 especies y subespecies diferentes. 1.459 fueron anilladas como pollos y las 7.964 restantes como volanderos. Además se detallan por especie las 152.488 aves anilladas durante los 52 años de existencia de la Estación Ornitológica de San Sebastián pertenecientes a 230 especies.

  19. Breeding bird study in the Mississippi River Floodplain

    Data.gov (United States)

    US Fish and Wildlife Service, Department of the Interior — A breeding bird study was initiated in 1992 to census birds on the Gardner Division of Mark Twain NWR. The division is located in the Mississippi River floodplain...

  20. 93rd Christmas Bird Count : Tewaukon National Wildlife Refuge

    Data.gov (United States)

    US Fish and Wildlife Service, Department of the Interior — These are the results of the 1992 Christmas Bird Count on Tewaukon National Wildlife Refuge. A total of 19 species and 989 individual birds were counted.