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Rev. peru. biol. (Impr.) ; 20(2)ago. 2013.
Article in English | LILACS-Express | LILACS, LIPECS | ID: biblio-1522321

ABSTRACT

This work was conducted in five oxbow lakes located between Cruzeiro do Sul and Rodrigues Alves counties (Acre State, Brazil), to provide additional information about the composition of zooplankton assemblages in the Upper Juruá River. Samples were collected from May 2009 to May 2010, and fixed with 4% formalina. The numeric density (ind.m-3) was obtained from subsequent sub-samples (1 mL). The study recorded 19 zooplankton families. Rotifers showed higher species richness (81 species), followed by cladocerans (3 species) and various forms of copepods and other organisms. Higher zooplankton means of numeric density was found in Novo Lake, with rotifers (1879 ind.m-3), cladocerans (207 ind.m-3), copepods (870 ind.m-3). Diversity and numeric density were similar to other Neotropical aquatic ecosystems


Este estudio se realizó en cinco lagos, situados entre Cruzeiro do Sul y Rodrigues Alves, y proporcionan información sobre la composición de las comunidades del zooplancton de la parte alta del Río Juruá. Se realizaron muestreos mensuales desde mayo de 2009 a mayo de 2010. El material se recolecto con una red de plancton con abertura de malla de 55 µm de malla. Fueron observadas 19 familias zooplancton. Los rotíferos tuvieron la mayor riqueza de especies (81), seguido por los cladóceros (3) y copépodos y otros organismos. La mayor densidad promedio se observó en el lago Novo, con 1879 ind.m-3 de rotíferos, 207 ind.m-3 de cladóceros, y 870 ind.m-3 de copépodos. La diversidad y la densidad numérica fueron similares a otros ecosistemas acuáticos del Neotrópico

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