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

Authors

  • Hugo Bornatowski Museu de História Natural Capão da Imbuia
  • Maurício de Castro Robert Universidade Federal do Paraná; Programa de Pós-Graduação em Zoologia
  • Luciano Costa Museu de História Natural Capão da Imbuia

DOI:

https://doi.org/10.1590/S1679-87592010000100005

Keywords:

Chondrichthyes, diet, seasonal variation, Paraná, Santa Catarina

Abstract

Rhinobatos 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.

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Published

2010-03-01

Issue

Section

naodefinida

How to Cite

Feeding of guitarfish Rhinobatos percellens (Walbaum, 1972) (Elasmobranchii, Rhinobatidae), the target of artisanal fishery in Southern Brazil . (2010). Brazilian Journal of Oceanography, 58(1), 45-52. https://doi.org/10.1590/S1679-87592010000100005