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Hydropeaking effects of on the diet of a Neotropical fish community 83
Gandini,Cíntia Veloso; Sampaio,Francisco Alexandre Costa; Pompeu,Paulo Santos.
The impact of hydropeaking by dams is still poorly understood. Studying the diet of fish subjected to that variation allows us to test the following hypotheses: 1) seasonal and daily changes in river flow, causes changes in the use of the feeding resources; 2) species presenting larger differences in diet between seasons will be those with larger diet changes due to hydropeaking; 3) hydropeaking effects will be more evident in species feeding on items that can be more affected by variable flows. Fish diet collected from the Grande River, downstream from Itutinga Dam, in January and July 2010, was characterized by the feeding index (IA). NMDS, ANOSIM and SIMPER analyses were used to compare the diets under different hydropeaking and season. Relationship...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Differences in diet; Flow fluctuation; Rio Grande fish; Invertivorous; Seasonality.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252014000400795
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The ichthyofauna of upper rio Capivari: defining conservation strategies based on the composition and distribution of fish species 83
Pompeu,Paulo dos Santos; Reis,Liana Sisi dos; Gandini,Cíntia Veloso; Souza,Rafael Couto Rosa de; Favero,Jana Menegassi del.
Although the rio Capivari basin is recognized as an area of great importance for the ichthyofauna, it lacks virtually every basic requirement for the definition of appropriate conservation strategies, since not even its species composition is known. The objective of this work is to determine the composition and distribution of fish species in the upper rio Capivari basin, relating them to the local physical features, and to evaluate the effectiveness of proposed conservations units, delimited based on areas of native vegetation remains, on the conservation of local ichthyofauna. During 2007, 50 different watercourses were sampled with gillnets, cast nets and kick nets. A total of 1308 individuals belonging to 41 species were captured. Degree of...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Conservation units; Altitudinal gradients; Rio Grande; Reserve design.
Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252009000400015
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