Abstract：
:We analyzed the diet and feeding habits of the fishes Heterandria bimaculata and Poecilia sphenops. Specimens were captured monthly in "Los Carros" damp, Morelos, Mexico (18 degrees 37' N, 98 degrees 43' W). We quantified gut content by the numerical method and by the frequency of 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 of sex, size and season. The index of niche overlap was high, from 0.74 to 0.99. The diet of P. sphenops consisted of 11 items, detritus being the most consumed, also independently of sex, size and season. The niche overlap index was high (0.99), indicating overlapping for all analyses. There was little diet overlap (0.26) between the two species.
journal_name
Rev Biol Tropjournal_title
Revista de biologia tropicalauthors
Trujillo-Jiménez P,Beto HTsubject
Has Abstractpub_date
2007-06-01 00:00:00pages
603-15issue
2eissn
0034-7744issn
2215-2075journal_volume
55pub_type
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journal_title：Revista de biologia tropical
pub_type： 杂志文章
doi：
更新日期：2005-03-01 00:00:00
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journal_title：Revista de biologia tropical
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journal_title：Revista de biologia tropical
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journal_title：Revista de biologia tropical
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journal_title：Revista de biologia tropical
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journal_title：Revista de biologia tropical
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更新日期：2002-06-01 00:00:00
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journal_title：Revista de biologia tropical
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journal_title：Revista de biologia tropical
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更新日期：2003-06-01 00:00:00
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更新日期：2012-06-01 00:00:00
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journal_title：Revista de biologia tropical
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