Atlantoraja Cyclophora
Mostrando 1-9 de 9 artigos, teses e dissertações.
-
1. Reproductive biology of the eyespot skate Atlantoraja cyclophora (Elasmobranchii: Arhynchobatidae) an endemic species of the Southwestern Atlantic Ocean (34ºS - 42ºS)
ABSTRACT Atlantoraja cyclophora is an endemic skate to the continental shelf of the Southwestern Atlantic Ocean (22ºS-47ºS) and a by-catch species in commercial bottom trawl fisheries. The morphometric relationships, the size at maturity and the reproductive cycle of this species were analyzed, with samples collected between 34ºS and 42ºS. The size range
Neotrop. ichthyol.. Publicado em: 25/06/2018
-
2. Feeding ecology of elasmobranch species in southeastern Brazil
RESUMO Devido à lacuna de conhecimento sobre os elasmobrânquios estudamos a ecologia alimentar de cinco espécies desse grupo, no litoral sul do Rio de Janeiro. Os exemplares foram capturados por rede de arrasto e espinhel de fundo, entre janeiro de 2006 e agosto de 2007. As dietas de Psammobatis rutrum e Psammobatis extenta se mostraram basicamente carcin
Neotrop. ichthyol.. Publicado em: 03/07/2017
-
3. Diet composition and feeding habits of the eyespot skate, Atlantoraja cyclophora (Elasmobranchii: Arhynchobatidae), off Uruguay and northern Argentina
ABSTRACT The eyespot skate, Atlantoraja cyclophora, is an endemic species from the southwestern Atlantic, occurring from Rio de Janeiro, Brazil, to northern Patagonia, Argentina. The feeding habits of this species, from off Uruguay and north Argentina, were evaluated using a multiple hypothesis modelling approach. In general, the diet was composed mainly of
Neotrop. ichthyol.. Publicado em: 30/09/2016
-
4. The feeding habits of the eyespot skate Atlantoraja cyclophora (Elasmobranchii: Rajiformes) in southeastern Brazil
The stomach contents of the eyespot skate, Atlantoraja cyclophora (Regan, 1903), were examined with the goal to provide information about the diet of the species. Samples were collected off the southern coast of Rio de Janeiro, Brazil, near Ilha Grande, between January 2006 and August 2007, at a depth of about 60 m. The diet was analyzed by sex, maturity sta
Zoologia (Curitiba). Publicado em: 2014-04
-
5. Size and sex composition of two species of the genus Atlantoraja (Elasmobranchii, Rajidae) caught by the bottom trawl fisheries operating on the Uruguayan continental shelf (southwestern Atlantic Ocean)
Neste trabalho foi analisada a variação espacial e temporal da distribuição de comprimento, proporções sexuais e dominância de maduros para Atlantoraja cyclophora e A. castelanui, na plataforma continental uruguaia. Houve diferenças significativas na distribução do comprimento total (TL) entre os sexos, sendo as fêmeas maiores que os machos para a
Brazilian Journal of Oceanography. Publicado em: 2011-12
-
6. Avaliação da sustentabilidade dos elasmobrânquios demersais à pesca de arrasto de camarão no litoral norte do estado de Santa Catarina
The objective of the study was to assess the sustainability of demersal elasmobranches caught by coastal pink shrimp trawl fishery in northern Santa Catarina, Brazil. The data were collected between June 2004 and November 2005 during 5 research cruises carried out on the research vessel Soloncy Moura, equipped with a otter trawl net. The study was divided in
Publicado em: 2007
-
7. "Dinâmica populacional de raias demersais dos gêneros Atlantoraja e Rioraja (Elasmobranchii, Rajidae) da costa sudeste e sul do Brasil" / Populational dymanics of skates genera Atlantorala and Rioraja (Elasmosbranchii, Rajidae) of Southeastern and Southern Coastal of Brazil
The proportions of the skates Rioraja agassizi, Atlantoraja cyclophora, A. platana and A. castelnaui landed by commercial fishing boats were analyzed. Data were collected from 358 hauls of 20 trips made by 11 double-otter trawlers and pair-trawlers. Fisheries were carried out between 10 and 430 m deep and from 23° S (State of Rio de Janeiro) to 31° S (Stat
Publicado em: 2006
-
8. Microscopic structure of the egg capsule of Atlantoraja cyclophora (Elasmobranchii: Rajidae: Arhynchobatinae)
A estrutura microscópica da cápsula ovífera de Atlantoraja cyclophora, endêmica na região sul-americana do Atlântico, é apresentada neste artigo. Em seção transversal, a face dorsal da cápsula ovígera tem uma largura de 70mi, e está subdividida em quatro camadas. Ventralmente, a parede da cápsula ovígera tem uma largura de 60mi e é conformada
Biota Neotropica. Publicado em: 2005
-
9. Distribution, abundance and morphometry of Atlantoraja cyclophora (Regan, 1903) (Elasmobranchii: Rajidae) in southern Brazil, Southwestern Atlantic
Foram capturados 459 exemplares de Atlantoraja cyclophora na costa do Rio Grande do Sul entre as latitudes 30º40'S e 34º30'S, em dois cruzeiros realizados respectivamente no inverno de 2001 e no verão/outono de 2002, com rede de arrasto de fundo, operada entre 100 e 600 m de profundidade. A espécie ocorreu nas profundidades de 100 a 300 m, não havendo d
Neotropical Ichthyology. Publicado em: 2004-09