Morphological aspects related to feeding of two marine skates Narcine brasiliensis Olfers and Rhinobatos horkelli Müller & Henle - DOI: 10.4025/actascibiolsci.v20i0.4468

Roberto Goitein; Fernando S. Torres; Carlos Eduardo Signorini

doi:10.4025/actascibiolsci.v20i0.4468

Aspectos morfológicos relacionados à alimentação de duas raias marinhas Narcine brasiliensis Olfers e Rhinobatos horkelli Müller & Henle - DOI: 10.4025/actascibiolsci.v20i0.4468

Roberto Goitein UNESP
Fernando S. Torres UNESP
Carlos Eduardo Signorini UNESP

DOI: https://doi.org/10.4025/actascibiolsci.v20i0.4468

Abstract

Narcine brasiliensis Olfers and Rhinobatos horkelli live in coastal waters close to the sea bottom and are commonly found in the same places. Feeding and some body measures of these species such as relative height and width and mouth width were studied. Results showed significant differences for stomach contents composition. N. brasiliensis feeds mainly on burrowing crustaceans and polychaets, whilst R. horkelli feeds on free living crustaceans. Body proportions show also significantly distinct results between the species. The former presents greater height and width, suggesting a slower species. Besides, this species uses electric discharges to detect its food and has a protruding mouth to catch it. On the other hand, the latter shows morphological features which apparently give it higher swimming speed to catch moving organisms faster than those explored by N. brasiliensis.

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Author Biography

Roberto Goitein, UNESP

Possui graduação em HIstória Natural pela Faculdade de Filosofia Ciências e Letras de Rio Claro (1973) , mestrado em Oceanografia Biológica pela Universidade de São Paulo (1978) e doutorado em Oceanografia Biológica pela Universidade de São Paulo (1984) . Atualmente é Professor Assistente Doutor da Universidade Estadual Paulista Júlio de Mesquita Filho. Tem experiência na área de Oceanografia , com ênfase em Oceanografia Biológica. Atuando principalmente nos seguintes temas: Filtracao, Sardinella Brasiliensis, Habitos Alimentares, Clupeidae, Osteichthyes Currículo Lattes

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Published

2008-07-21

How to Cite

Goitein, R., Torres, F. S., & Signorini, C. E. (2008). Aspectos morfológicos relacionados à alimentação de duas raias marinhas Narcine brasiliensis Olfers e Rhinobatos horkelli Müller & Henle - DOI: 10.4025/actascibiolsci.v20i0.4468. Acta Scientiarum. Biological Sciences, 20, 165-169. https://doi.org/10.4025/actascibiolsci.v20i0.4468

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Issue

Vol 20 (1998)

Section

Biology Sciences

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