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Fish diet composition in permanent and semi-permanent pools in tropical wetlands of the Yucatan Peninsula Neotropical Ichthyology
Hinojosa-Garro,Demián; Arceo-Gómez,Joselito; Zambrano,Luis; Escalera-Vázquez,Luis H..
We compared fish diet composition between permanent (P) and semi-permanent (SP) pools in Petenes Biosphere Reserve (PBR), Campeche. A total of 445 gut contents were examined to determine stomach relative fullness (RF), fish diet as index of niche breadth (INB) and diet overlap. In SP pools, species showed a RF of 1.66 (57.20 % empty stomachs) whereas in P pools, the RF was 2.91 (31.16%). We classified fish diet into six trophic groups: detritivorous, herbivorous-detritivorous, insectivorous, piscivorous, omnivorous and malacophagous. Species in P pools were found to be specialist. Conversely, species present in both habitats shifted to generalist patterns. There was a 54.0% dissimilarity in fish diet composition between pools. From all items identified,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Campeche; Feeding ecology; Freshwater fish; Mexico; Petenes Biosphere Reserve.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252013000400881
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Fish population responses to hydrological variation in a seasonal wetland in southeast México Neotropical Ichthyology
Escalera-Vázquez,Luis H.; Calderón-Cortés,Nancy; Zambrano-González,Luis.
ABSTRACT Hydrological variation differently affects fish species. In the present study, the response of local populations of 13 fish local species to hydrological variation in a tropical wetland was evaluated. The objectives were to analyze the abundance response of fish species with distinct life history strategies and to assess the role of hydrological variation on fish population patterns. We found that opportunistic strategists were favored by high hydrological variation in drought periods, the equilibrium strategists were related to stable habitats, and periodic strategists were regulated by floods and temperature. However, the life history strategies identified for some species in this study do not correspond to the classification reported in other...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Dry season; Fish resilience; Life history strategies; Rainy season; Sian Ka´an.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252017000200207
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