Corregido I Aceptado I A total of 1 specimens were obtained monthly samples. Females represented Overall sex ratio was 1.
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We analyzed the diet and feeding habits of the fishes Heterandria bimaculata and Poecilia sphenops. 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. The index of niche overlap was high, from 0.
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Rev Biol Trop. PMID: Spanish. PMID: Merino RS, et al. Diet and feeding strategy of blackmouth catshark Galeus melastomus. Anastasopoulou A, et al. J Fish Biol.
PMID: Review. Show more similar articles See all similar articles. Publication types English Abstract Actions. MeSH terms Animals Actions.
Female Actions. Fresh Water Actions. Male Actions. Mexico Actions. Seasons Actions. Copy Download.
We investigated a basic generalization in parasite community ecology stating that stochastic processes played a major part in determining the composition of helminth communities of freshwater fish, or on the contrary, if these communities are predictable, diverse and structured species assemblages. Approaching our data from the metapopulation standpoint we studied the spatial patterns, and examined the variation in composition and richness of the component communities across different locations. We tested the prediction that helminth species may be recognized as common or rare; and also two hypotheses anticipating depauperate communities and decay of similarity between component communities with increasing distance. We found these communities composed by a highly structured and predictable set of specialist autogenic helminth species that are constant and abundant, dominating all components throughout space. The prediction that it is possible to recognize common and rare species was met. Richer than expected communities were found, as well as highly homogeneous component communities, where neighbouring components were more similar than distant ones. We speculated that the processes shaping the development of these component communities include stable, predictable habitats through time, allowing for a slow gradual dispersion process limited by host and parasite species capabilities.
Heterandria bimaculata (Heckel, 1848)
Reproductive life history of Heterandria bimaculata Heckel, Poeciliinae: Poeciliidae in the Honduran interior highlands: trait variation along an elevational gradient. Charles T. Olinger 1. Brandon K. Emmanuel A. Frimpong 1.