Effects of body size on the diet of Rivulus haraldsiolii (Aplocheiloidei: Rivulidae) in a coastal Atlantic Rainforest island stream, southern Brazil

Vinícius Abilhoa,Hugo Bornatowski,Jean Ricardo Simões Vitule,Luciana Festti,Igor Kintopp Ribeiro,Glauco Ubiratan Kohler,Fagner Breda De Lara,Wanessa Priscila David Do Carmo

doi:10.5007/2175-7925.2010v23n4p59

Vinícius Abilhoa, Hugo Bornatowski + Show 6 more

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https://doi.org/10.5007/2175-7925.2010v23n4p59

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Abstract

The effect of body size on the feeding habits of the little-known killifi sh Rivulus haraldsiolii, collected in a coastal Atlantic Rainforest island stream, was investigated. Samples were collected during a study trip on

Highlights

The Neotropical killifish Rivulus haraldsiolii Berkenkamp, 1984 was recently redescribed, and recorded as being endemic to Atlantic Forest coastal drainages in southern Brazil, between Paraná and Santa Catarina states (Costa, 2007)
Available evidence suggests that the group might have a generalist diet (Taylor, 1992; Shibatta and Rocha, 2001; Shibatta and Bennemann, 2003; Laufer et al, 2009), and differences in the diet richness and prey size are related to variations in body sizes (Santos-Filho, 1997; Laufer et al, 2009)
We describe here the effect of body size on the feeding habits of individuals of R. haraldsiolii collected in an Atlantic Rainforest island brackish stream, based on data collected during field studies conducted on 13 July 2009, and related to the field ecology course promoted by the Ecology and Conservation Post Graduation Program of the Federal University of Paraná on Ilha do Mel Island

Summary

Introduction

The Neotropical killifish Rivulus haraldsiolii Berkenkamp, 1984 was recently redescribed, and recorded as being endemic to Atlantic Forest coastal drainages in southern Brazil, between Paraná and Santa Catarina states (Costa, 2007). We describe here the effect of body size on the feeding habits of individuals of R. haraldsiolii collected in an Atlantic Rainforest island brackish stream, based on data collected during field studies conducted on 13 July 2009, and related to the field ecology course promoted by the Ecology and Conservation Post Graduation Program of the Federal University of Paraná on Ilha do Mel Island. The study site is considered to be one of the most southern Atlantic Forest areas (Marques and Oliveira, 2004) where freshwater and brackish streams flow directly into the Atlantic Ocean, belonging to the coastal drainages of eastern Brazil province

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