Sample records for copepods
from WorldWideScience.org

Sample records 1 - 9 shown.



1

Microarthridion corbisierae sp. nov. (Harpacticoida, Tachidiidae), um novo copépode da meiofauna do litoral norte do estado de São Paulo, Brasil/ Microarthridion corbisierae sp. nov. (Harpacticoida, Tachidiidae), a new meiofaunal copepod from the Northern coast of São Paulo State, Brazil

Kihara, Terue C.; Rocha, Carlos E. F.
2007-12-01

Resumo em português Durante estudos sobre a diversidade de copépodes harpacticóides meiobentônicos marinhos, um novo representante da família Tachidiidae foi encontrado na plataforma continental interna do estado de São Paulo, entre o canal de São Sebastião e a área costeira em frente á praia de Ubatumirim, Ubatuba (23º24'S, 44º57,6'W). Material complementar foi coletado próximo à praia da Enseada, Ubatuba (23º30'S, 45º05'W). Embora esta nova espécie compartilhe com M. lauren (mais) ticum (Nicholls, 1940) a redução das antênulas, ela pode ser facilmente distinguida de seus congêneres pela presença de apenas 2 artículos no endópodo da perna 4 e pela redução no número de cerdas internas do endópodo-3 das pernas 1-4 e do exópodo-3 da perna 3. Os Tachidiidae, que tipicamente habitam sedimentos finos de águas rasas salobras e marinhas do Hemisfério Norte, são considerados bioindicadores de ambientes ricos em material orgânico. Este é o primeiro relato da família no hemisfério sul. Resumo em inglês During studies on the diversity of meiobenthic marine harpacticoid copepods, a new representative of the family Tachidiidae was found on the inner continental shelf of São Paulo State, between São Sebastião Channel and Ubatumirim Bay, Ubatuba (23º24'S, 44º57,6'W). Complementary material was collected near Enseada Beach, Ubatuba (23º30'S, 45º05'W). Although the new species shares with M. laurenticum (Nicholls, 1940) the reduced antennules, it can be easily distingui (mais) shed from its congeners by leg 4 endopod with only two segments and the reduction of the number of inner setae of legs 1-4 endopod-3 and leg 3 exopod-3. Tachidiids, typically inhabiting fine sediments of brackish and marine shallow waters in the Northern Hemisphere, are good indicators of heavy organic pollution. This is the first record of the family Tachidiidae in the southern hemisphere.

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2

Metazoarios parásitos de Micropogonias furnieri (Osteichthyes: Sciaenidae) do litoral do Estado do Rio de Janeiro, Brasil/ METAZOAN PARASITES OF Micropogonias furnieri (OSTEICHTHYES: SCIAENIDAE) FROM THE COASTAL ZONE FROM THE STATE OF RIO JANEIRO, BRAZIL

RAMOS ALVES, DIMITRI; LUQUE, JOSÉ LUIS
2000-01-01

Resumo em português Entre setembro de 1997 e agosto de 1998 foram examinados 40 espécimes de Micropogonias furnieri (Desmarest, 1823) (Osteichthyes: Sciaenidae) do litoral do Estado do Rio de Janeiro, Brasil (aprox. 21-23° S, 41-45° O), sendo necropsiados para estudo dos seus metazoários parasitos. Dezessete espécies de metazoários parasitos foram encontrados, sendo 1 espécie de aspidobothreo, 3 de digenéticos, 3 de monogenéticos, 1 de cestóide, 2 de acantocéfalos, 2 de nematóide (mais) s, 1 de hirudíneo, 3 de copépodes e 1 de isópode. Micropogonias furnieri é um novo registro de hospedeiro para as seguintes espécies: Brachadena pyriformis Linton, 1910; Caligus haemulonis Krøyer, 1863 e Clavellotis dilatata (Krøyer, 1863). Neobrachiella chevreuxii (van Beneden, 1891) e Dichelyne elongatus (Tornquist, 1931) é registrada pela primeira vez no Brasil Resumo em inglês Between September of 1997 and August of 1998, 40 specimens of Micropogonias furnieri were captured of the coastal of the State of Rio de Janeiro, Brazil (aprox. 21-23° S, 41-45° W), and necropsied to study of their metazoan parasites. Seventeen species of metazoan parasites were identified, 1 aspidobothrid, 3 digeneans, 3 monogeneans, 1 cestode, 2 acantocephalans, 2 nematodes, 1 hirudinean, 3 copepods and 1 isopod. Micropogonias furnieri is a new host record for Brachad (mais) ena pyriformis Linton, 1910; Caligus haemulonis Krøyer, 1863; and Clavellotis dilatata (Krøyer, 1863). Neobrachiella chevreuxii (van Beneden, 1891) and Dichelyne elongatus (Tornquist, 1931) were recorded by the first time from Brazil

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3

Composição, abundância e distribuição espacial do zooplâncton no complexo estuarino de Paranaguá durante o inverno de 1993 e o verão de 1994/ Zooplankton composition, abundance and spatial distribution in the estuarine complex of Paranaguá during winter 1993 and summer 1994

Lopes, Rubens M.; Vale, Rosinei do; Brandini, Frederico P.
1998-01-01

Resumo em português A estrutura das associações zooplanctônicas do complexo estuarino de Paranaguá foi estudada no inverno de 1993 e no verão de 1994. Copépodes dos gêneros Acartia, Paracalanus, Parvocalanus, Temora, Pseudodiaptomus, Oithona e Euterpina foram dominantes, atingindo até cerca de 90% da densidade total. A única espécie que ocorreu preferencialmente em salinidades inferiores a 15 foi o calanóide Pseudodiaptomus richardi, que representa o principal componente do holopl (mais) ncton nos setores oligohalinos. Acartia tonsa e Oithona oswaldocruzi predominaram nos trechos intermediários, associadas a outras espécies estuarino-marinhas que suportam maiores variações de salinidade, como Acartia lilljeborgi, Pseudodiaptomus acutus e Oithona hebes. Espécies marinho-eurihalinas como Temora turbinata, Paraca/anus quasimodo, Oithona simplex e Euterpina acutifrons ocorreram em salinidades tão baixas quanto 15, mas foram mais abundantes na área externa influenciada pela água costeira. Várias espécies marinho-estenohalinas, associadas principalmente às águas quentes da Corrente do Brasil, foram registradas no setor euhalino. Outros grupos zooplanctônicos numericamente importantes foram os tintinineos, apendiculárias, cladóceros e alguns representantes do meroplncton, como as larvas de poliquetas e decápodes. Os máximos de abundncia do zooplncton (até cerca de 82000 org.m-3) ocorreram nos setores intermediários, em salinidades variando entre 15 e 30, coincidindo aproximadamente com o padrão de distribuição da biomassa fitoplanctônica. Resumo em inglês Zooplankton community structure was investigated in the estuarine complex of Paranaguá (Southern Brazil) during July 1993 (winter) and February-March 1994 (summer). Copepods belonging to the genera Acartia, Paracalanus, Parvocalanus, Pseudodiaptomus, Temora, Oithona and Euterpina dominated the zooplankton associations, attaining up to 90% of total densities. Pseudodiaptomus richardi was the dominant estuarine copepod in oligohaline stretches with salinities below 15. Est (mais) uarine marine species such as Acartia tonsa, Oithona hebes and Oithona oswaldocruzi reached high densities in salinities ranging from 17 to 25. Other abundant estuarine marine species including Acartia lilljeborgi and Pseudodiaptomus acutus occurred in a broader salinity range. Marine euryhaline copepods were found in salinities as low as 15, but were usually more abundant in areas under the influence of coastal waters. Several marine stenohaline species associated with the warm waters of the Brazil Current were recorded in the euhaline areas. Other important zooplanktonic groups in this estuarine complex were tintinnids, appendicularians, cladocerans and meroplanktonic larvae of polychaetes and decapods. Density maxima (up to 82400 org.m-³) were found in the intermediate stretches - in salinities varying from 15 to 30 - corresponding approximately to the distributional pattern of phytoplankton biomass.

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4

Persistência na água e influência de herbicidas utilizados na lavoura arrozeira sobre a comunidade zooplanctônica de Cladocera, Copepoda e Rotifera/ Water persistence and influence of herbicides utilized in rice paddy about zooplankton community of Cladocers Copepods and Rotifers

Reimche, Geovane Boschmann; Machado, Sérgio Luiz de Oliveira; Golombieski, Jaqueline Ineu; Baumart, Joele Schmitt; Braun, Neiva; Marchesan, Enio; Zanella, Renato
2008-02-01

Resumo em português Em lavoura de arroz irrigado, é utilizada uma grande quantidade de agroquímicos que, dependendo da sua persistência a campo e toxicidade, podem contaminar corpos d’água e afetar organismos vivos. Com o objetivo de determinar o efeito de concentrações de campo dos herbicidas Clomazone, Quinclorac, Metsulfuron-methyl e Propanil na comunidade zooplanctônica (Cladocera, Copepoda e Rotifera), conduziu-se um experimento em viveiros de aqüicultura, de março a maio de 2 (mais) 005, na estação do outono. Nos dias 1°, 2°, 3°, 7°, 10°, 18°, 31° e 51° após a aplicação dos herbicidas, foram coletadas amostras de água para se determinarem parâmetros físico-químicos da água, concentração dos herbicidas e comunidade zooplanctônica. Os parâmetros médios da qualidade da água foram: oxigênio dissolvido (3,5mg L-1), temperatura (20,1°C), pH (6,0), dureza total (18mg L-1 de CaCO3) e alcalinidade total (9mg L-1 de CaCO3). A ordem decrescente de persistência dos herbicidas na água foi Clomazone = Quinclorac > Propanil > Metsulfuron-methyl, com média de 31, 31, 10 e 7 dias, respectivamente. Os resultados indicaram que os herbicidas provocaram poucas alterações na densidade de organismos dos grupos Rotifera e Copepoda (Adulto e Nauplio). A densidade do grupo Cladocera permaneceu baixa para todo o período experimental. Resumo em inglês In the rice paddy field it is used a large amount of agrochemical that, depending on their field persistence and toxicity, can contaminate water bodies and may affect living organism. With the objective of determining the effect of field concentrations of Clomazone, Quinclorac, Metsulfuron-methyl and Propanil herbicides on zooplankton community (Cladocers, Copepods and Rotifers), it was carried an experiment in aquaculture ponds, during March to May 2005, in autumn season (mais) . In the 1st, 2nd, 3rd, 7th, 10th, 18th, 31th and 51th days after the herbicides application, water samples were collected to evaluate the physical chemical water parameters, herbicides concentration and zooplankton community. The water physical chemical parameters means were: dissolved oxygen (3.5mg L-1), temperature (20.1°C), pH (6.0), total hardness (18mg L-1 CaCO3) and total alkalinity (9mg L-1 CaCO3). The decreasing of herbicides persistence in water was: Clomazone = Quinclorac > Propanil > Metsulfuron-methyl with average of 31, 31, 10 and 7 days, respectively. The results indicated that the herbicides provoke little alteration in density of Rotifers and, Copepods (Adults and Nauplii). The Cladocers group density remained low for the whole experiment period.

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5

Macrozooplâncton da Zona Econômica Exclusiva do Nordeste do Brasil (segunda expedição oceanográfica - REVIZEE/NE II) com ênfase em Copepoda (Crustacea)

Cavalcanti, Eliane Aparecida Holanda; Larrazábal, Maria Eduarda Lacerda de
2004-09-01

Resumo em português Objetivando-se caracterizar a densidade, abundância relativa, freqüência de ocorrência, diversidade específica e associação de espécies do macrozooplâncton oceânico da "Zona Econômica Exclusiva" foi realizado o presente estudo. A região prospectada encontra-se localizada entre os paralelos 7º28'56"S - 34º32'45"W, referente a segunda expedição oceanográfica do Programa REVIZEE/NE, realizada pelo Noc. Antares da DHN/Marinha do Brasil. As amostras fo (mais) ram coletadas com rede de plâncton tipo bongo com malha de 300 e 500µm, no período de 31/01 a 07/02/97 em 21 estações, totalizando 42 amostras. Foram identificados 78 taxa. A densidade total dos organismos (exceto Copepoda) variou de 2,31 a 6,06 org.m-3 (estações 55 e 56) e, para os Copepoda de 0,99 a 4,75 org.m-3 (estações 48 e 57). Em termos de freqüência de ocorrência Crustacea e Chaetognatha foram muito freqüentes; Cnidaria e Teleostei (ovos e larvas) freqüentes; Mollusca, Annelida e Chordata pouco freqüentes e Protozoa raros. A diversidade específica variou de 0,648 a 4,037 ind.bits-1. A equitabilidade variou de 0,279 a 1,0. Os baixos valores de diversidade e equitabilidade ocorreram devido à dominância de Undinula vulgaris (Dana, 1849) e Calanopia americana F. Dahl, 1894. A análise cofenética revelou um r Resumo em inglês The present study was performed with the objective to characterise the density, relative abundance, frequency of occurrence, specific diversity and species associations of the oceanic macrozooplankton of the "Exclusive Economic Zone". The area under investigation is located between 7º28'56"S - 34º32'45"W and 3º21'08"S - 38º40'29"W, sampled during the second oceanographic expedition REVIZEE/NE on board OV Antares of the Brazilian Navy. Twenty-one sample (mais) s were taken with bongo type plankton net with 300µm mesh size between 0 and 200 m depth. 63 (sixty and three) taxa were identified. Total density varied from 2,31 to 6,06 ind.m-3 (station 55 and 56) for the whole community and from 0,99 to 4,75 ind.m-3 (station 48 and 57) for Copepoda. Regarding frequency of occurrence, Crustacea and Chaetognatha were very frequent, Cnidaria and Teleostei were frequent, Mollusca, Annelida, and Chordata were less frequent, and Protozoa occurred rarely. Specific diversity varied from 0,648 to 4,037 bits.ind -1, and the equitability from 0,279 to 1,0. Diversity and equitability were low due to the dominance of Undinula vulgaris (Dana, 1849) e Calanopia americana F. Dahl, 1894. Cophenetic analysis revealed a r

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6

Ecologia das comunidades de metazoários parasitos, do xaréu, Caranx hippos (Linnaeus) e do xerelete, Caranx latus Agassiz (Osteichthyes, Carangidae) do litoral do estado do Rio de Janeiro, Brasil/ Community ecology of metazoan parasites of the crevalle jack, Caranx hippos (Linnaeus) and the horse-eye jack, Caranx latus Agassiz (Osteichthyes, Carangidae) from the coastal zone of the State of Rio de Janeiro, Brazil

Luque, José Luis; Alves, Dimitri Ramos
2001-06-01

Resumo em inglês Sixty specimens of Caranx hippos (Linnaeus, 1766) and fifty-five specimens of Caranx latus Agassiz, 1831 collected from the coastal zone of the State of Rio de Janeiro (21-23ºS, 41-45ºW), Brazil, from October 1998 to October 1999, were necropsied to study their metazoan parasites. All specimens of C. hippos were parasitized, and the majority of specimens of C latus (96.4%) were parasitized by one or more metazoan species. Nineteen species of parasites were collected in (mais) C. hippos: 5 digeneans, 5 monogeneans, 2 cestodes, 5 nematodes, and 2 copepods. Seventeen species of parasites were collected in C. latus: 6 digeneans, 2 monogeneans, 3 cestodes, 4 nematodes, and 2 copepods. The endoparasites (digeneans, cestodes, and nematodes) were the majoriry, 76.4% and 63.3%, of the total number of parasite specimens collected in C. hippos and C. latus, respectively. The monogeneans Allopyragraphorus hippos (Hargis, 1956) and Cemocotyle carangis (MacCallum, 1913) were the most dominant species with the highest parasitic prevalence in the parasite community of C. hippos and C. latus, respectively. The metazoan parasites of the two host species showed the typical overdispersed pattern of distribution. Bucephalus varicus Manter, 1940. A. hippos, Protomicrocotyle mirabilis (MacCallum, 1918), Cucullanus pulcherrimus Barreto, 1918, and Lemanthropus giganteus KrΦyer, 1863 had a positive correlation only between the host's total length and abundance andlor prevalence in C. hippos. Bucephalus varicus, Tergestia pectinata (Linton, 1905), C. carangis, and Pseudoterranovo sp. had a positive correlation between the host's total length and abundance and/or prevalence in C. latus. In C. hippos, the copepod Caligus robustus Bassett-Smith, 1898 had the highest values of prevalence and abundance in the female hosts. No parasite species showed influence of the host's sex on their prevalence and abundance in C. latus. The mean diversity and the parasite species richness of the parasite infracommunities of C. hippos and C. latus were not significantly different. Only the parasite species diversity of C. hippos was correlated with the host's total length; in both host species the parasite diversity did not showed differences in relation to the sex of the host. Only one pair of ectoparasite species, A. hippos - P. mirabilis, showed significant positive co-occurrence and covariation in the parasite infracommunities of C. hippos. Two endoparasite species, B. varicus - Parahemiurus merus (Linton, 1910), showed negative co-occurrence and positive covariation; and the pair B. varicus - Pseudoterranova sp. had positive co-occurrence and covariation in the infracommunities of C. latus. The values of qualitative and quantitative simila rity coefficients between the parasite communities of C. hippos and C. latus were 55.5 and 30.4, respectively. The parasite communities of C. hippos and C. latus were defined as closest to isolationist type because there are few evidences of interspecific associations or covariations. Additional parasitological studies on other species of carangid fishes from the South American Atlantic Ocean are needed to evaluate the structure of carangid parasite communities in the Neotropical region.

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7

Atlas de copépodos planctônicos, Calanoida e Cyclopoida (Crustacea), da Amazônia Brasileira: I. Represa de Curuá-Una, Pará

Silva, Edinaldo Nelson dos Santos; Robertson, Barbara Ann; Reid, Janet Lancaster Warner; Hardy, Elsa Rodrigues
1989-01-01

Resumo em inglês This paper was elaborated with intention of complementing original descriptions, updating the distribution ofthe species and providing the taxonomic basis necessary for a secure identification of the animals. We present detailed ilustrations of 6 species of Calanoid copepods and 3 species of Cyclopoids copepods found, but not necessarilly restricted to the Curuá - Una Reservoir located in the municipality of Santarém, state of Pará, Brazil.

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8

Aspectos da biologia de Buenoa platycnemis (Fieber) (Insecta, Heteroptera, Notonectidae) da Restinga de Maricá, Rio de Janeiro/ On the biology of Buenoa platycnemis (Fieber) (Insecta, Heteroptera, Notonectidae) at Restinga de Maricá, Rio de Janeiro State, Brazil

Nessimian, Jorge Luiz; Ribeiro, José Ricardo Inácio
2000-03-01

Resumo em inglês A monthly quantitative study on B. platycnemis (Fieber, 1851) was carried out in a sand dune marsh, on the littoral of Rio Janeiro State. The aims of this study were to correlate the life cycle of the species with the seasonal regime of the water body, defining steps of the annual cycle, age strueture, and to indicate oviposition sites and trophic relations. The species shows a marked seasonal tendency. The major steps of the life cycle obtained were an invernal (weak) wi (mais) th a predominance of imagines, followed by another of population expansion, characterized by the absence of adults, massive eclosions and predominance of low instar nymphs. Probably, B. platycnemis has a sensibility to water levei variation and might be intluenced by the concentration of Spirogyra sp. (Chlorophyceae) in the water column. In relation to oviposition, B. platycnemis has not shown preference for any macrophyte, since eggs were found in Rhynchosphora corymbosa (Linnaeus) Britton (Cyperaceae), Eleocharis sellowiana Kunth. (Cyperaceae) and Nymphoides indica (Linnaeus) O. Kuntze. (Menyanthaceae). The observed predators of B. platycnemis were Anax amazilli (Burmeister, 1839) (Aeshinidae), Eryihemis crédula (Hagen, 1861) (Libellulidae) and other Odonata, nymphs and adults of Belostoma candidulum Montandon, 1903 (Belostomatidae), Notonecta (Paranecta) disturbata Hungerford, 1926, Buenoa antigone antigone (Ki-rkaldy, 1899) (Notonectidae), besides Curicta cf. tibialis (Martin, 1898) and Ranatra horvalhi Montandon, 1910 (Nepidae). Larvae of Sayomyia sp. (Chaoboridae), Chiro-nomus spp. and Labrundinia sp. (Chironomidae), Callibaetis gutlatus Navás, 1915 (Baetidae), cladocerans and copepods are potential prey of B. platycnemis, while ostracodes were refused.

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9

Alimentação de Bairdiella ronchus (Cuvier) (Perciformes, Sciaenidae) na Baía de Guaratuba, Paraná, Brasil/ Feeding of Bairdiella ronchus (Cuvier) (Perciformes, Sciaenidae) at the Guaratuba Bay, Paraná, Brazil

Vendel, Ana Lúcia; Chaves, Paulo de Tarso da Cunha
1998-01-01

Resumo em inglês Seasonal variation of food items of Bairdiella ronchus (Cuvier, 1830) classified by size was analysed based on monthly samples between september/1993 and september/1996 at the Guaratuba Bay, Southern Brazil. The stomach contents of a hundred eighty-two fishes were analysed by the Occunence Frequency Method and Point Count for a Lot Method. The individuais were divided in two groups, smaller and longer than 140mm, and a comparative study of digestive tract and branchial ar (mais) e was performed for these groups. For fishes smaller than 140mm the following sequence of items was obtained matching both methods by using the Preponderance índices: decapods (subdivided in Brachyura, Caridea and Penaeidea), polychaets, isopods, fishes, unidentified material, copepods, amphipods, molluscs and plant material. For fishes longer than or equal to 140mm the sequence was decapods, polychaets, fishes, copepods, amphipods, isopods, molluscs and plant material, in this order. These results suggest that Bairdiella ronchus at the Guaratuba Bay is a carnivorous species using mainly decapod crustaceans as food throughout the year.

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