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Composition, abundance and biomass of the benthic fish fauna from the Guaritico river of a Venezuelan floodplain

Published online by Cambridge University Press:  01 February 2009

C. Lasso  and
J. Castroviejo
C. Lasso
Affiliation:
Asociación Amigos de Doñana, 2182, 41080 Sevilla, España Museo Historia Natural La Salle, 1930, Caracas 1010-A, Venezuela
J. Castroviejo
Affiliation:
Asociación Amigos de Doñana, 2182, 41080 Sevilla, España
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Abstract

The compositon, abundance and biomass of the benthic fish fauna were studied along a 6 km stretch of the Guaritico River. This water course is located in the western plains of Venezuela and belongs to the Apure River floodplain system. Monthly collections from June, 1990 to January, 1991 were made by means of a small trawling apparatus rigged to dugout canoes according to the design of López-Rojas et al. (1984). 42 fish species were identified with a dominance of species from the orders Siluriformes and Gymnotiformes. The fish assemblage differed markedly from other Venezuelan river systems. Seasonally, higher diversity and evenness were observed at the high water phase while the abundance, relative biomass and CPUE were higher at low water.

Keywords

Fish compositionabundancebiomassbenthic fishfloodplain systemsGuaritico RiverVenezuelaAbondancebiomassepoissons benthiquessystème de plaine d'inondationrivière GuariticoVénézuéla
Type
Research Article
Information
Annales de Limnologie - International Journal of Limnology , Volume 28 , Issue 1 , 1992 , pp. 71 - 84
Copyright
© Gauthier-Villars, 1992

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