Diet of Cnesterodon decemmaculatus (Poeciliidae) and Jenynsia multidentata (Anablepidae) in a hypertrophic shallow lake of Uruguay


Autoria(s): Quintans,Federico; Scasso,Flavio; Loureiro,Marcelo; Yafe,Alejandro
Data(s)

01/03/2009

Resumo

Diet of Cnesterodon decemmaculatus (Jenyns, 1842) and Jenynsia multidentata (Jenyns, 1842) were analysed in Lake Rodó, an urban hypertrophic lake from Montevideo, Uruguay. Both species displayed omnivory. The most consumed items for C. decemmaculatus were zooplankton, periphyton, phytoplankton and detritus; the diet of J. multidentata included zooplankton, insects, crustaceans and juvenile fish. Our results suggest that both species could be acting as facultative planktivores. The fish community of this lake is characterised by the dominance of C. decemmaculatus and J. multidentata. Under this condition, predation on large-bodied zooplankton could indirectly be contributing to maintain a high phytoplankton abundance and a low water transparency.

Formato

text/html

Identificador

http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212009000100014

Idioma(s)

en

Publicador

Fundação Zoobotânica do Rio Grande do Sul

Fonte

Iheringia. Série Zoologia v.99 n.1 2009

Palavras-Chave #Fish feeding #facultative planktivores #eutrophication
Tipo

journal article