The feeding habits of the eyespot skate Atlantoraja cyclophora (Elasmobranchii: Rajiformes) in southeastern Brazil

Viana, Alessandra da Fonseca; Vianna, Marcelo

doi:10.1590/s1984-46702014000200003

Cited by 10 publications

(15 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…In general, the diet composition of A. cyclophora off Uruguay and northern Argentina is consistent with the results obtained in Brazil (Ubatuba Bay, Soares et al, 1992; southern coast of Rio de Janeiro, Viana & Vianna, 2014), where decapods and teleosts are the most consumed prey. This pattern indicates that A. cyclophora maintains its feeding habits along its distribution range in the Southwest Atlantic, using similar food resources and likely having the same trophic role.…”

Section: Discussionsupporting

confidence: 88%

“…As with another skate species, A. cycplophora showed ontogenetic shifts in the diet composition: small individuals consumed largely shrimps, but large individuals preyed mainly on crabs and teleosts. In southeastern Brazil, the diet of immature and mature individuals was similar, but shrimps were more common in immature individuals and teleosts and crabs were more consumed by mature individuals (Viana & Vianna, 2014). In general terms, the ontogenetic pattern of A. cyclophora is consistent between regions, which would reflect an identical use of trophic resources throughout its distribution range.…”

Section: Discussionmentioning

confidence: 86%

“…In the study area, shrimps are more abundant in the warm season than in the cold season (Iorio et al, 1996;Scelzo et al, 2002), indicating that A. cyclophora may be adapting its feeding habits to seasonal changes in prey abundance. In southeastern Brazil, diet composition of A. cyclophora is also related to seasonal prey abundance, but the most important prey consumed in summer were crabs (Viana & Vianna, 2014). Also, seasonal changes in predation risk may be affecting the feeding habits of A. cyclophora, as it is preyed upon by large sharks during the warm season (Lucifora et al, 2009).…”

Section: Discussionmentioning

confidence: 99%

“…Information on the feeding habits of A. cyclophora is scarce. Diet composition has been studied in detail only off the southern coast of Rio de Janeiro, Brazil, near Ilha Grande, where A. cyclophora preys mainly on crustaceans and teleosts, with seasonal differences in diet composition (Viana & Vianna, 2014).…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Diet composition and feeding habits of the eyespot skate, Atlantoraja cyclophora (Elasmobranchii: Arhynchobatidae), off Uruguay and northern Argentina

Barbini

Lucifora

2016

Neotrop. ichthyol.

View full text Add to dashboard Cite

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 decapod crustaceans, followed by teleost fishes. Molluscs, mysidaceans, amphipods, isopods, lancelets and elasmobranchs were consumed in lower proportion. The consumption of shrimps drecreased with increasing body size of A. cyclophora. On the other hand, the consumption of teleosts increased with body size. Mature individuals preyed more heavily on crabs than immature individuals. Teleosts were consumed more in the south region (34º -38ºS) and crabs in the north region (38º -41ºS). Shrimps were eaten more in the warm season than in the cold season. Prey size increased with increasing body size of A. cyclophora, but large individuals also consumed small teleosts and crabs. Atlantoraja cyclophora has demersal-benthic feeding habits, shifts its diet with increasing body size and in response to seasonal and regional changes in prey availability and distribution.La raya de círculos, Atlantoraja cyclophora, es una especie endémica del Atlántico Sudoccidental, que se distribuye desde Río de Janeiro, Brasil, hasta el norte de la Patagonia, Argentina. Los hábitos alimentarios de esta especie fueron evaluados frente a la costa de Uruguay y norte de Argentina, utilizando un enfoque de modelado de múltiples hipótesis. En general, la dieta estuvo compuesta principalmente por crustáceos decápodos (71,37 %IRI), seguido de peces teleósteos (28,54 %IRI). En menor proporción fueron consumidos moluscos, misidáceos, anfípodos, isópodos, anfioxos y elasmobranquios. El consumo de decápodos Natantia disminuyó con el incremento del tamaño del cuerpo de A. cyclophora. Por otro lado, el consumo de teleósteos se incrementó con el incremento del tamaño del cuerpo. Individuos maduros consumieron cangrejos en mayor proporción que individuos inmaduros. Los teleósteos fueron consumidos mayormente en la región sur (34º -38ºS) y los cangrejos en la región norte (38º -41ºS). Los decápodos Natantia fueron más consumidos en la estación cálida que en la estación fría. El tamaño de las presas consumidas se incrementó con el aumento del tamaño corporal de A. cyclophora, pero individuos de mayor tamaño no abandonadon el consumo de pequeños cangrejos y teleósteos. Atlantoraja cyclophora presenta hábitos alimentarios demersal-bentónicos, cambia su dieta con el incremento del tamaño corporal y en respuesta a cambios estacionales y regionales en la disponibilidad y distribución de las presas.

show abstract

Section: Discussionsupporting

confidence: 88%

Section: Discussionmentioning

confidence: 86%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Diet composition and feeding habits of the eyespot skate, Atlantoraja cyclophora (Elasmobranchii: Arhynchobatidae), off Uruguay and northern Argentina

Barbini

Lucifora

2016

Neotrop. ichthyol.

View full text Add to dashboard Cite

show abstract

“…Since this species has no commercial value, it is discarded when captured by fishers. However, it plays a relevant ecological role in the food web by acting both as a predator and as prey and constituting an important food item for some fish species (Viana et al, 2014;Motta et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

Population structure of the swimming crab Achelous spinicarpus (Crustacea, Portunoidea) in São Paulo northern coast, Brazil

Silva

Taddei

Bertini

et al. 2017

Neotropical Biology and Conservation

View full text Add to dashboard Cite

The swimming crab Achelous spinicarpus is commonly captured as a "by catch" of the shrimp fishery. This study evaluated some aspects of the population structure of A. spinicarpus, such as sex-ratio and size classes' frequency distribution. A shrimp trawler equipped with double-rig nets was used to capture the swimming crabs at Ubatuba and Caraguatatuba areas, northern coast of São Paulo state, Brazil. A total of 1,057 individuals were collected in Ubatuba, including 598 males (525 juveniles and 73 adults) and 459 females (379 juveniles and 80 adults, including 15 ovigerous crabs). In Caraguatatuba 5,112 individuals were collected, of which 3,138 males (2,638 juveniles and 500 adults) and 1,974 females (1,746 juveniles and 228 adults, including 29 ovigerous crabs). The sex-ratio favors the number of males in both regions, probably because females have the habit of occupying deeper regions. The size classes' frequency distribution shows polymodality for both sexes, except for males in Ubatuba. This is the result of some age groups among the juveniles, which migrate to shallower areas, being affected by the fishing activity. Adults have the habit of staying in deeper areas characterized by colder waters.Keywords: Brachyura, sex-ratio, Decapoda, bycatch, size distribution. ResumoO siri candeia, Achelous spinicarpus, é comumente capturado como "by catch" da pesca camaroeira. Este estudo avaliou alguns aspectos de sua estrutura populacional, como razão sexual e distribuição de frequência em classes de tamanho. Para coletar os siris, foi utilizado um barco de pesca camaroeiro equipado com redes "double rig" nas áreas de Ubatuba e Caraguatatuba, litoral norte do estado de São Paulo, Brasil. Um total de 1.057 indivíduos foi coletado em Ubatuba, incluindo 598 machos (525 juvenis e 73 adultos) e 459 fêmeas (379 juvenis e 80 adultas, incluindo 15 ovígeras). Em Caraguatatuba, 5.112 indivíduos foram coletados, dos quais 3.138 machos (2.638 juvenis e 500 adultos) e 1.974 fêmeas (1.746 juvenis e 228 adultas, incluindo 29 ovígeras). A razão sexual favoreceu o número de machos em ambas as áreas, provavelmente devido ao hábito de as fêmeas ocuparem regiões mais profundas. A distribuição de frequência em classes de tamanho apresentou polimodalidade para ambos os sexos, exceto para machos em Ubatuba. Isso é resultado de alguns grupos etários entre os juvenis, os quais migram para áreas mais rasas, sendo afetados pela atividade pesqueira. Os adultos permanecem em áreas mais profundas, caracterizadas por águas frias. Population structure of the swimming crab Achelous spinicarpus (Crustacea, Portunoidea) in São Paulo northern coast, Brazil Palavras

show abstract

Diet and trophic level of the longnose spurdog, Squalus blainville (Risso, 1826) in the 25-nautical mile Fisheries Management Zone around the Maltese Islands

Bonnici

Bonello

Schembri

2018

Regional Studies in Marine Science

View full text Add to dashboard Cite

The feeding habits of the eyespot skate Atlantoraja cyclophora (Elasmobranchii: Rajiformes) in southeastern Brazil

Cited by 10 publications

References 21 publications

Diet composition and feeding habits of the eyespot skate, Atlantoraja cyclophora (Elasmobranchii: Arhynchobatidae), off Uruguay and northern Argentina

Diet composition and feeding habits of the eyespot skate, Atlantoraja cyclophora (Elasmobranchii: Arhynchobatidae), off Uruguay and northern Argentina

Population structure of the swimming crab Achelous spinicarpus (Crustacea, Portunoidea) in São Paulo northern coast, Brazil

Diet and trophic level of the longnose spurdog, Squalus blainville (Risso, 1826) in the 25-nautical mile Fisheries Management Zone around the Maltese Islands

Contact Info

Product

Resources

About