|
|
|
| Registros recuperados: 95 | |
|
| |
|
| |
|
|
| Avila,Tatiana R.; Pedrozo,Catarina S.; Bersano,José Guilherme F.. |
| Com o objetivo de conhecer a variação temporal da composição, abundância, diversidade e biomassa do zooplâncton da zona de arrebentação da Praia de Tramandaí, Rio Grande do Sul, amostragens quinzenais foram realizadas entre agosto de 2005 e agosto de 2006. Os arrastos foram efetuados com rede cilindro-cônica com 150 cm de comprimento, 50 cm de diâmetro de boca e malha de 300 µm. Dados de clorofila-a, direção do vento, corrente de deriva litorânea, salinidade, temperatura do ar e da água também foram obtidos. O grupo dos Copepoda foi responsável pela maior diversidade de espécies, sendo que Temora turbinata (Dana, 1849) apresentou maior abundância relativa e freqüência de ocorrência. Outras espécies de Copepoda também foram importantes numericamente como... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Zona de arrebentação; Tramandaí; Zooplâncton; Copepoda; Metamysidopsis elongata atlantica. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212009000100003 |
| |
|
|
| Bell, S.; Bron, J.E.; Sommerville, C.. |
| The morphology, function and distribution of exocrine glands of copepods have rarely been studied in detail and almost nothing is known about them in the sea lice species L. salmonis and C. elongatus. This study utilised a novel application of a light-microscopy staining technique to reveal a variety of glands m nauplius, copepodid, chalimus, preadult and adult stages. The stain, 3’,3-diaminobenzidine tetrahydrochloride (DAB), applied to fresh material, differentiated a population of exocrine glands and enabled a study of their distribution. The stain was successful in highlighting the ducts and pores associated with the larger glands. The locations of gland sub-populations were conserved in all life-stages, although glands in the swimming legs were found... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Gland; Sea lice; Diaminobenzidine; Peroxidase; Caligidae; Copepoda. |
| Ano: 2000 |
URL: http://www.repository.naturalis.nl/record/534416 |
| |
|
|
| BENETTON,Maria Linda Flora de Novaes; MALTA,José Celso de Oliveira. |
| Os estágios de náuplios e copepodito I de Perulernaea gamitanae Thatcher & Paredes, 1985 foram estudados a partir de cultura de ovos obtidos de fêmeas adultas, parasitas de tambaqui, Colossoma macropomum (Cuvier, 1818) (Osteichthyes: Characidae), provenientes de tanques de cultivo em Manaus, Amazonas, Brasil. As larvas foram mantidas no laboratório à temperatura de 28ºC. O desenvolvimento de P. gamitanae de náuplio I até náuplio VI durou cinco dias e cada estágio era precedido de uma muda. As principais diferenças entre cada estágio foram o aparecimento de setas no segmento terminal da antênula, acréscimo no número de setas furcais, variação no comprimento e na forma do corpo. No sexto dia eclodiu o primeiro estágio de copepodito, que sobreviveu sete... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Parasita de Peixes de Água Doce; Copepoda; Ciclo de Vida; Amazônia. |
| Ano: 1999 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59671999000100097 |
| |
|
|
| Bessa, Gisele Fernandes; Universidade Federal do Tocantins; Vieira, Ludgero Cardoso Galli; Universidade de Brasília; Bini, Luis Mauricio; Universidade Federal do Goiás; Reis, Deusiano Florêncio dos; Universidade Federal do Tocantins; Morais, Paula Benevides de; Universidade Federal do Tocantins. |
| The goal of this study was to evaluate the concordance amongst three zooplankton groups (Rotifera, Cladocera, and Copepoda) and between the zooplankton groups and the environmental variables in the Luis Eduardo Magalhães reservoir, in the Mid-Tocantins River, Tocantins State, Brazil. Concordance patterns were found in relation to environmental variables, cladocerans, and rotifers, although values were relatively low. These results indicate that one should be cautious about the use of indicative taxonomic groups to detect environmental changes, where divergent results annul extrapolation possibilities and indicate the existence of distinct environmental factors controlling different groups. |
|
Palavras-chave: 2.05.02.00-1 Concordance; Reservoir; Rotífera; Cladocera; Copepoda 2.05.02.00-1 Concordance; Reservoir; Rotífera; Cladocera; Copepoda. |
| Ano: 2011 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/7336 |
| |
|
|
| Bowman, Thomas E.. |
| Lovenula (Neolovenula) alluaudi is widespread on Lanzarote, where it occurred at 22 of the 105 stations. On Fuerteventura it was found at only 2 of the 53 stations, both in the extreme northwest part of the island. It was also found in a reservoir on the south side of the small island of Alegranza. Samples collected at several hundred stations in the other Canary Islands failed to yield a single calanoid, supporting the belief that the eastern islands are fragments of the African continent that drifted to deeper waters. Males outnumbered females in about 2/3 of the samples, often heavily. |
| Tipo: Article / Letter to the editor |
Palavras-chave: Copepoda; Calanoida; Lovenula; Canary Islands; Stygofauna. |
| Ano: 1990 |
URL: http://www.repository.naturalis.nl/record/504428 |
| |
|
| |
|
| |
|
|
| Bron, J.E.; Shinn, A.P.; Sommerville, C.. |
| The ultrastructure of moulting in the chalimus phase of the parasitic caligid copepod Lepeophtheirus salmonis is described for the first time. The major features of the moult sequence correspond to those of other Crustacea, save for the absence of a distinguishable intermoult as defined by reduced epidermal activity and a cessation of cuticle production. This latter may be explained cither in terms of a continuous moulting process related to the constant food supply available to a parasite or in terms of a highly abbreviated intermoult period. The findings are discussed with respect to studies of other Crustacean species. |
| Tipo: Article / Letter to the editor |
Palavras-chave: Chalimus; Copepoda; Moult; Cuticle; Ultrastructure; Parasite. |
| Ano: 2000 |
URL: http://www.repository.naturalis.nl/record/534408 |
| |
|
| |
|
| |
|
| |
|
|
| Dias,Cristina de Oliveira; Bonecker,Sérgio Luiz Costa. |
| The aim of this work was to study the structure of the copepod community in relation to hydrographic conditions in Espírito Santo Bay, from 1993 to 1997. Zooplankton samples were obtained in the horizontal tows four times a year, using a 200 µm net. Temperature, salinity and dissolved oxygen were determined in the water samples. The overall mean density of the copepods was 9,085 ind.m-3 with the peaks exceeding 15,000 ind.m-3 in the summer and autumn during the first three years (1993 - 1995). The PCA analysis was used to relate the environmental conditions with the distribution of the copepods. The increases in the abundant species, namely Acartia lilljeborgi, Oithona hebes, Oithona oculata, Paracalanus quasimodo, Parvocalanus crassirostris and Euterpina... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Copepoda; Crustacea; Spatial-temporal variation; Espírito Santo Bay; Brazil. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132008000400011 |
| |
|
|
| DIAS,CRISTINA O.; ARAUJO,ADRIANA V. DE; BONECKER,SÉRGIO L.C.. |
| In this study, we analyzed the main distributional features of Scolecitrichidae species in the Southwestern Atlantic Ocean (northern region of Rio de Janeiro State) and determined and described their habitat partitioning, based on a night series of stratified samplings down to a depth of 1,200 m. A total of 18 species from seven genera were identified and grouped according to their depth distribution. Distinct vertical patterns of total density, richness, diversity, and evenness were observed, with a decrease in density and an increase in diversity and richness with increasing depth. The total scolecitrichid abundance was dominated by a few epipelagic migrant species (Scolecithrix danae, Scolecithricella minor, Amallothrix tenuiserrata, and Lophothrix... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Copepoda; Scolecitrichid; Deep waters; Southwestern Atlantic Ocean; Tropical environment. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652019000100611 |
| |
|
| |
|
| |
|
|
| Dürbaum, Johannes. |
| Precopulatory mate guarding and mating behaviour of Tachidius discipes Giesbrecht, 1881, has been analysed using a video camera mounted on a microscope. Males preferably accompany fourth or fifth stage female copepodids during precopulatory mate guarding; only rarely are third copopodid stages guarded. Rare cases of males clasping juvenile males are also known. Males are active during mate guarding and constantly change the site of attachment of their antennules. This behaviour may ensure continued association of the adult male with the juvenile copepodid when the latter moults during the mate guarding phase. The final moult of the female, once observed only, lasts only 2 minutes. Copulation immediately follows but is preceded by the male’s control of the... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Copepoda; Harpacticoida; Precopulatory mate guarding; Mating. |
| Ano: 1997 |
URL: http://www.repository.naturalis.nl/record/504239 |
| |
|
| |
|
|
| Falavigna da Rocha, Carlos Eduardo. |
| Neocyclops (Protoneocyclops) ferrarii sp. n. is described from Candy’s Pond, Twin Cays, Belize. It is morphologically closest to N. (P.) wellsi Petkovski, 1986 from Mozambique and N. (P.) herbsti Petkovski, 1986 from the Red Sea. Pediger 1 in Neocyclops is distinct although reduced and often concealed beneath the cephalic shield. Specimens of Neocyclops (N.) vicinus and N. (N.) medius showed the same condition, warranting the supposition that the free pediger 1 is a consistent feature of the genus. The genital double somite bears a transverse cuticular thickening which apparently supports the seminal receptacle. The importance of the integumental pore patterns of the urosome and legs as useful taxonomic characters is pointed out. |
| Tipo: Article / Letter to the editor |
Palavras-chave: Taxonomy; Crustacea; Copepoda; Cyclopoida; Neocyclops; Caribbean fauna; Belize; Brackish water. |
| Ano: 1995 |
URL: http://www.repository.naturalis.nl/record/504108 |
| |
| Registros recuperados: 95 | |
|
|
|
