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Alimentação e distribuição de piaus (Pisces, Anostomidae) na Planície do Bananal, Mato Grosso, Brasil Zoologia
Melo,Cesar Enrique de; Röpke,Cristhiana Paula.
Os peixes da família Anostomidae, conhecidos popularmente como piaus, são restritos à América do Sul e representam importante fonte de renda para pescadores de muitas regiões. Estudos na Amazônia Central demonstram que estes peixes apresentam alta plasticidade alimentar e estão amplamente distribuídos pela região. Neste estudo, são analisadas nove espécies de Anostomidae e discutidas interações ecológicas relativas a sua alimentação e distribuição na Planície do Bananal, uma região de cerrado sujeita a inundações periódicas, drenada pela Bacia Araguaia/Tocantins. A amplitude de nicho alimentar foi baixa entre as seis espécies analisadas (0,125 e 0,355). Schizodon vittatum (Valencienes, 1894), a espécie com maior amplitude de nicho também é a mais...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Ecologia de peixes; Rio Araguaia; Cerrado; Nicho.
Ano: 2004 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752004000100010
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Feeding habits of fish from a stream in the savanna of Central Brazil, Araguaia Basin Neotropical Ichthyology
Melo,Cesar Enrique de; Machado,Francisco de Arruda; Pinto-Silva,Vangil.
The objective of the present study was to determine the composition of the diet of fish and its relation to the condition of canopy along a stream in the savanna of Central Brazil. Fish were collected monthly from April 1994 to March 1995. A total of 3872 individuals belonging to 82 species were captured and 1606 of them had their stomach content analysed. Allochthonous resources were widely used by fish. Although some fish groups do present generalist habits, most of the species can be included in well-defined trophic groups. Piscivores were abundant only during the flooding season when they occupied the stream looking for food and reproduction sites. Deforestation of the riparian forest has negative effects on the fish populations that depend on...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Neotropical fishes; Fish ecology; Trophic interactions; Riparian forest; Cerrado.
Ano: 2004 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252004000100006
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Influence of environmental parameters on fish assemblage of a neotropical river with a flood pulse regime, Central Brazil Neotropical Ichthyology
Melo,Tatiana Lima de; Tejerina-Garro,Francisco Leonardo; Melo,Cesar Enrique de.
This study aims to determine which of twelve environmental parameters (five physicochemical and seven hydromorphological) influence on the fish assemblage structure of the lower Mortes River basin located in the Bananal floodplain of the Araguaia River basin, Central Brazil. Sampling was conducted in six stretches of 1000 m each during the high and low waters. Fish were captured using gill nets and environmental parameters were measured by portable equipment or determined visually. The co-inertia analysis indicated that two physicochemical (dissolved oxygen and water transparency), and four hydromorphological (channel width and depth, riparian vegetation cover and type of the riverside substrate) parameters structure the fish assemblages, both driven by...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Ecological interactions; Physicochemical variables; Hydromorphology.
Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252009000300009
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Relationships between water transparency and abundance of Cynodontidae species in the Bananal floodplain, Mato Grosso, Brazil Neotropical Ichthyology
Melo,Cesar Enrique de; Lima,Jane Dilvana; Silva,Eliete Francisca da.
The Cerrado in the Central Brazil is currently one of the most threatened ecosystems in the world. As a result, the aquatic habitats in this biome also undergo great impacts. Alterations related to land-use change increase sediment loadings in rivers, streams and lakes, resulting in sedimentation and decrease in water transparency. Water transparency determines underwater visibility conditions, and as a consequence fish assemblages respond to spatial and temporal changes in this variable. This work aimed to examine the influence of transparency on the abundance and distribution of Cynodontidae species, a visually oriented predatory fish group. Fish sampling was conducted in 15 sites located between Mortes and Araguaia rivers in the Bananal floodplain, Mato...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Fish ecology; Cerrado; Central Brazil; Conservation; Araguaia.
Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252009000200017
Registros recuperados: 4
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