Data/hora: 11/06/2024 03:04:57

Provedor de dados: | 83
País: | Brazil
Título: | Relationships between water transparency and abundance of Cynodontidae species in the Bananal floodplain, Mato Grosso, Brazil
Autores: | Melo,Cesar Enrique de; Lima,Jane Dilvana; Silva,Eliete Francisca da.
Data: | 2009-06-01
Ano: | 2009
Palavras-chave: | Fish ecology; Cerrado; Central Brazil; Conservation; Araguaia.
Resumo: | 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 Grosso State. Regression analysis between relative abundance of Cynodontidae (in number of individuals and biomass) and water transparency showed a positive and highly significant correlation, indicating that this group shows species-specific habitat affinities for clearer waters. These results suggest that the increase in water turbidity in this region can affect the patterns of abundance and distribution of the Cynodontidae species, as well as other visually oriented fishes.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252009000200017
Editor: | Sociedade Brasileira de Ictiologia
Relação: | 10.1590/S1679-62252009000200017
Formato: | text/html
Fonte: | Neotropical Ichthyology  v.7 n.2 2009
Fonte: | info:eu-repo/semantics/openAccess