Comparative study of the zooplankton composition of two lacustrine ecosystems in Southwestern Amazonia
The zooplankton communities of two lacustrine ecosystems in southwestern Amazonia (Lago Amapá and Lago Pirapora) were studied based on samples collected over an 11-month period. The general aim of the present work was to contribute to the knowledge of the zooplankton fauna in southwestern Amazonia,...
| Published in: | Acta Scientiarum. Biological Sciences |
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| Main Author: | |
| Format: | Article in Journal/Newspaper |
| Language: | Portuguese |
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Universidade Estadual De Maringá
2008
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| Online Access: | https://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/2042 https://doi.org/10.4025/actascibiolsci.v25i2.2042 |
| Summary: | The zooplankton communities of two lacustrine ecosystems in southwestern Amazonia (Lago Amapá and Lago Pirapora) were studied based on samples collected over an 11-month period. The general aim of the present work was to contribute to the knowledge of the zooplankton fauna in southwestern Amazonia, by studying the occurrence of certain species; and to improve the knowledge of the Rio Acre tributaries. The total number of taxa included 38 species of rotifers, 6 cladocerans and 7 copepods. Most of the species were from the rotifer family Brachionidae. Jaccard´s similarity index was similar for the two lakes at 0.6964 The constancy index defined the species Keratella cochlearis, Filinia cf. terminalis, Filinia opoliensis, Hexarthra intermedia braziliensis, Ceriodaphnia cornuta, Moina minuta, Diaphanosoma spinulosum, and immature forms (nauplii and copepodites) as the constant in these lakes. The presence of zooplankton with higher number of species occupying the middle depths, during morning and night periods A comunidade zooplanctônica de dois ecossistemas lacustres localizados na Amazônia Sul-Ocidental (Lago Amapá e Lago Pirapora) foi estudada, com base em amostras coletadas, durante 11 meses. O objetivo geral do presente trabalho foi contribuir com o conhecimento da fauna do zooplâncton na Amazônia Sul-Ocidental, estudando particularmente a ocorrência de certas espécies nos tributários do Rio Acre. Foi registrado o total de taxas: 38 rotíferos, 6 cladóceros e 7 copépodos. O índice de Jaccard, para comparar a similaridade entre os dois lagos, foi 0,6964. Brachionidae foi a família com o maior número de espécies. O índice de constância definiu as espécies Keratella cochlearis, Filinia cf. terminalis, Filinia opoliensis, Hexarthra intermedia braziliensis, Ceriodaphnia cornuta, Moina minuta, Diaphanosoma spinulosum, e ainda as formas imaturas (náuplios e copepoditos) como constantes nos lagos estudados. Observou-se o maior número de espécies ocupando o meio da coluna da água, durante o período da manhã e noite |
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