Hábitos alimentares de tubarões-martelo jovens, Sphyrna zygaena (Carcharhiniformes: Sphyrnidae), no litoral sul do Brasil

Bornatowski, Hugo; Costa, Luciano; Robert, Maurício de Castro; Pina, Juliana Ventura da

doi:10.1590/s1676-06032007000100025

Cited by 15 publications

(12 citation statements)

References 13 publications

(5 reference statements)

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“…cuvier (Randall, ; Simpfendorfer, ; Lowe et al , ; Heithaus, ; Simpfendorfer et al , ; Bornatowski et al , 2012 b , c ) and S . zygaena (Smale, ; Cortés, ; Smale & Cliff, ; Bornatowski et al , ; Rogers et al , ).…”

Section: Discussionunclassified

Feeding ecology and trophic comparisons of six shark species in a coastal ecosystem off southern Brazil

Bornatowski

Braga

Abilhôa³

et al. 2014

Journal of Fish Biology

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The diets of six shark species, Sphyrna lewini, Sphyrna zygaena, Carcharhinus obscurus, Carcharhinus limbatus, Rhizoprionodon lalandii and Galeocerdo cuvier, were investigated in a subtropical coastal ecosystem of southern Brazil. Stomach content data were obtained to assess foraging niche segregation and ontogenetic shifts in the diets of these sharks. Five of the shark species off the Paraná coast were ichthyophagous, with the exception of S. zygaena, which was teutophagous. With the exception of G. cuvier, which had a generalist diet, the other five species displayed specialization in their feeding. Ontogenetic shifts were observed in C. obscurus and S. lewini with large individuals consuming elasmobranchs. Owing to the diet overlap between C. obscurus and S. lewini, C. obscurus and C. limbatus and R. lalandii and C. limbatus, future studies on the spatial and temporal distributions of these species are needed to understand the extent of competitive interactions.

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Section: Discussionunclassified

Feeding ecology and trophic comparisons of six shark species in a coastal ecosystem off southern Brazil

Bornatowski

Braga

Abilhôa³

et al. 2014

Journal of Fish Biology

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“…Many species of shark frequently consume Cephalopoda, which is usually related to pelagic feeding habits (VASKE-JR.; RINCÓN-FILHO, 1998;CORTÉS, 1999;LIMA et al, 2000;VASKE-JR., 2005;BORNATOWSKI et al, 2007b). The occurrence of the squid Lolliguncula brevis in two stomachs of R. percellens indicates that this species can feed on other organisms, evidencing a small degree of opportunism.…”

Section: Discussionmentioning

confidence: 99%

Feeding of guitarfish Rhinobatos percellens (Walbaum, 1972) (Elasmobranchii, Rhinobatidae), the target of artisanal fishery in Southern Brazil

2010

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A B S T R A C TRhinobatos percellens is one of three species of Rhinobatidae found on Brazilian shores and is one of the most abundant species on the shallow continental shelf of Paraná and Santa Catarina States. Specimens caught by artisanal fishery between July/2001 and March/2003 by fishing communities located on the frontier between two southern Brazilian States (Paraná and Santa Catarina) had their stomach contents analyzed. According to the Alimentary Index (IAi), Decapoda (69%) and Teleostei (22%) were the main items consumed. Polychaeta, a common prey consumed by several benthonic fishes, was poorly represented in the feeding of R. percellens. This fact may be related to the availability of prey in the environment, or to the size of the guitarfish analyzed (ontogeny). Seasonal variance of main preys (with higher IAi) was observed: Dendrobranchiata and Pleocyemata displayed higher percentages in spring and autumn, Teleostei in the winter and Brachyura during the summer. R E S U M ORhinobatos percellens é uma das três espécies de Rhinobatidae encontrada na costa brasileira e uma das espécies de elasmobrânquio mais abundante na plataforma continental dos estados do Paraná e Santa Catarina. Indivíduos capturados pela pesca artesanal entre Julho/2001 e Março/2003 nas comunidades pesqueiras localizadas entre o Paraná e Santa Catarina tiveram seus conteúdos estomacais analisados. O Índice de Importância Alimentar (IAi) mostrou que as principais presas consumidas foram Decapoda (69%) e Teleostei (22%). Polychaeta, principal presa ingerida por várias espécies de peixes bentônicos foi pouco expressiva na alimentação de R. percellens. Essa diferença pode estar relacionada com a disponibilidade de presas no ambiente ou com o tamanho das raias analisadas (ontogenia). De acordo com análises sazonais, observou-se que os camarões Dendrobranchiata e Pleocyemata foram as principais presas consumidas durante a primavera e outono, Teleostei durante o inverno e Brachyura durante o verão.

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“…The diet composition matrix was determined using an online database (fishbase.org) and other studies of the same group or species and region. The main studies consisted of dolphins [ 39 – 41 ], sharks [ 42 – 45 ], dogfish [ 46 ], large pelagic fish [ 43 , 47 ], Thunnus atlanticus [ 48 ], grouper [ 49 ], Lutjanus spp. [ 50 ], Coryphaena hippurus [ 43 ], Euthynnus alletteratus [ 51 ], octopus and squid [ 52 – 54 ], carnivorous zoobenthos [ 55 – 57 ], detritivorous zoobenthos [ 57 , 58 ], and Scomberomorus brasiliensis , Seriola fasciata , Cynoscion jamaicensis , and S .…”

Section: Methodsmentioning

confidence: 99%

More than Anecdotes: Fishers’ Ecological Knowledge Can Fill Gaps for Ecosystem Modeling

et al. 2016

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BackgroundEcosystem modeling applied to fisheries remains hampered by a lack of local information. Fishers’ knowledge could fill this gap, improving participation in and the management of fisheries.MethodologyThe same fishing area was modeled using two approaches: based on fishers’ knowledge and based on scientific information. For the former, the data was collected by interviews through the Delphi methodology, and for the latter, the data was gathered from the literature. Agreement between the attributes generated by the fishers’ knowledge model and scientific model is discussed and explored, aiming to improve data availability, the ecosystem model, and fisheries management.Principal FindingsThe ecosystem attributes produced from the fishers’ knowledge model were consistent with the ecosystem attributes produced by the scientific model, and elaborated using only the scientific data from literature.Conclusions/SignificanceThis study provides evidence that fishers’ knowledge may suitably complement scientific data, and may improve the modeling tools for the research and management of fisheries.

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Hábitos alimentares de tubarões-martelo jovens, Sphyrna zygaena (Carcharhiniformes: Sphyrnidae), no litoral sul do Brasil

Cited by 15 publications

References 13 publications

Feeding ecology and trophic comparisons of six shark species in a coastal ecosystem off southern Brazil

Feeding ecology and trophic comparisons of six shark species in a coastal ecosystem off southern Brazil

Feeding of guitarfish Rhinobatos percellens (Walbaum, 1972) (Elasmobranchii, Rhinobatidae), the target of artisanal fishery in Southern Brazil

More than Anecdotes: Fishers’ Ecological Knowledge Can Fill Gaps for Ecosystem Modeling

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