Trophic groups of demersal fish of the internal continental shelf from Ubatuba, Brazil. 1. Chondrichthyes.

Stomach contents of 7 cartilaginous fish species were analysed with the aim to detect trophic groups. Sampling was effectuated between October/85 and July/87 off the coast of Ubatuba (Sao Paulo, Brazil) in waters up 50 m depth. The relative importance of different components of the diet was expresse...

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Bibliographic Details
Published in:Boletim do Instituto Oceanográfico 1992-01, Vol.40 (1-2), p.79-85
Main Authors: Soarez, LSH, Rossi-Wongtschowoki, CLB, Alvarez, LMC, Muto, E Y, Gasalla, MA
Format: Article
Language:Portuguese
Subjects:
Marine
Rajidae
Rhinobatidae
Squalidae
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Summary:Stomach contents of 7 cartilaginous fish species were analysed with the aim to detect trophic groups. Sampling was effectuated between October/85 and July/87 off the coast of Ubatuba (Sao Paulo, Brazil) in waters up 50 m depth. The relative importance of different components of the diet was expressed as a percentage frequency of occurrence and percentage number. The seven species were grouped in: fish feeders - Squalus cubensis; benthonic crustacean and fish feeders - Raja castelnaui, Raja cyclophora, Raja agassizi; benthonic invertebrate feeders - Rhinobatos horkelii, Zapteryx brevirostris, Psammobatis glansdissimilis.
ISSN:0373-5524