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vol.11 issue4Papilionoidea and Hesperioidea (Lepidoptera) from Curitiba and vicinity, Paraná, Brazil with taxonomic notes on HesperiidaeTrophic relations among the five most representative fish species in the Jacarepaguá lagoon edges, Rio de Janeiro author indexsubject indexarticles search
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Revista Brasileira de Zoologia

Print version ISSN 0101-8175


YABE, Regina de Souza  and  BENNEMANN, Sirlei Terezinha. Diet composition of Schizodon intermedius Garavello & Britski of the Tibagi river, Paraná and its relation to some morphological characteristics of the digestive tract (Osteichthyes, Anostomidae). Rev. Bras. Zool. [online]. 1994, vol.11, n.4, pp.777-788. ISSN 0101-8175.

In order to analyse the diet of Schizodon intermedius Garavello & Britski, 1990, captures were made every season during the period of April/1990 to February/1991, using gillnets of different mesh size at Sertanópolis, a region of Paraná State. An analysis of stomach fullness degree was made upon 76 individuals (including young ones). A sample of 20 adult specimens was chose to compare the morphology of the digestive tract with the diet found. It was concluded that S. intermedius is a grazer herbivore whose principal diet consists of leaves and stalks of two monocotyledonous plants: Poaceae and/or Cyperaceae. This species shows quanlitative, but not qualitative feeding seasonal variations. It was verified that intestinal quotient of the species is X = 1.34, the variation of gill rakers number is 18-23 and of the pyloric caeca number is 15-25. These morphological characteristics found in this species are typical of herbivore fishes.

Keywords : Pisces; Anostomidae; Schizodon intermedius; food; herbivore.

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