Data/hora: 11/06/2024 15:33:42

Provedor de dados: | 83
País: | Brazil
Título: | Passage of fish larvae and eggs through the Funil, Itutinga and Camargos Reservoirs on the upper Rio Grande (Minas Gerais, Brazil)
Autores: | Suzuki,Fábio Mineo; Pires,Lucas Vilela; Pompeu,Paulo Santos.
Data: | 2011-01-01
Ano: | 2011
Palavras-chave: | Conservation; Downstream migration; Ichthyoplankton; Migratory fish; Spawning.
Resumo: | The objective of this study was to evaluate the passage of fish eggs and larvae through the Funil, Itutinga and Camargos Reservoirs, located in the upper Rio Grande basin, Minas Gerais, Brazil. Samples were taken downstream and upstream of the dams using a conical ichthyoplankton net and were collected every two weeks, twice per sampling day, between November 2008 and March 2009. Although eggs and larvae were abundant immediately upstream of the reservoirs, no ichthyoplankton were captured immediately downstream of the dams, possibly indicating that eggs and larvae do not pass through the reservoirs. The arrival of ichthyoplankton in the reservoirs without its effective passage downstream makes the survival of these eggs and larvae unlikely. Furthermore, this lack of downstream movement may compromise the recruitment of species to downstream stretches, especially in the case of the Funil Reservoir (because of the presence of a fish pass in this dam). We emphasize that the fish lift operation at the Funil Dam must be carefully assessed, considering not only its efficiency but also its short- and long-term effects on the recruitment of migratory fish species from the river.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252011000300014
Editor: | Sociedade Brasileira de Ictiologia
Relação: | 10.1590/S1679-62252011000300014
Formato: | text/html
Fonte: | Neotropical Ichthyology  v.9 n.3 2011
Fonte: | info:eu-repo/semantics/openAccess