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| Format: | Artículo científico |
| Language: | en |
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Universidad de Costa Rica
2007
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| Online Access: | https://www.redalyc.org/articulo.oa?id=44955221 |
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Table of Contents:
- Alimentación de los peces dulceacuícolas tropicales Heterandria bimaculata y Poecilia sphenops (Cyprinidontiformes: Poeciliidae) Héctor Toledo Beto Patricia Trujillo-Jiménez Biología diet Mexico Morelos food habits Los Carros Diet of the tropical freshwater fish Heterandria bimaculata (Haeckel) and Poecilia sphenopsValenciennes (Cyprinidontiformes: Poeciliidae). We analyzed the diet and feeding habits of the fishesHeterandria bimaculata and Poecilia sphenops. Specimens were captured monthly in Los Carros damp,Morelos, Mexico (18°37´ N, 98°43´ W). We quantified gut content by the numerical method and by the frequencyof occurrence method; and used the MacArthur and Levin´s indices for niche overlap. The diet of H.bimaculata was composed by 16 prey categories, mainly dipterans (Culicidae predominated), independently ofsex, size and season. The index of niche overlap was high, from 0.74 to 0.99. The diet of P. sphenops consistedof 11 items, detritus being the most consumed, also independently of sex, size and season. The niche overlapindex was high (0.99), indicating overlapping for all analyses. There was little diet overlap (0.26) between thetwo species. Rev. Biol. Trop. 55 (2): 603-615. Epub 2007 June, 29. 2007 artículo científico 0034-7744 https://www.redalyc.org/articulo.oa?id=44955221 en http://www.redalyc.org/revista.oa?id=449 Revista de Biología Tropical application/pdf Universidad de Costa Rica Revista de Biología Tropical (Costa Rica) Num.2 Vol.55