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| Registros recuperados: 242 | |
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| ARCIFA,M. S.. |
| The diet of the four larval instars of a Chaoboridae species of Lake Monte Alegre, was evaluated through the analysis of the crop content of individuals caught at night in the lake. Peridinium and zooflagellates were the major components of the diet of instars I and II, whereas microcrustaceans, especially the cladoceran Bosmina, were most important for late instars. When the preferential prey decreased, in the course of the year, the diet was more diversified, increasing the ingestion of Peridinium by instars III and IV. There is a relationship between the mouth diameter of the larvae and the maximum width, height, or diameter of the ingested organisms. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Chaoboridae; Four instars; Diet; Zooplankton; Omnivory. |
| Ano: 2000 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0034-71082000000400008 |
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| MARGARITA FRUTOS,SANTA. |
| Zooplankton abundance and diversity of Salado and Negro rivers were compared in relation to the water level fluctuations. The zooplankton pumper samples were collected between March, 1993 and October, 1994. Mean zooplankton density at Salado river was very higher in upstreem. Zooplankton density in the Negro and Salado rivers were variable in the high water phase. Changes in the density appeared to be related to the hydrologic phases, seasonal cycle and conductivity variation. The zooplankton abundance was positively correlated with the abiotic and biotic factors (temperature, transparency and fitoplankton). The dominant group in the two studied rivers were the rotifers. The dominant species in the high water phase were limnoplanktonic and scarce... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: The rivers; Zooplankton; Density; Diversity and similarity. |
| Ano: 1998 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0034-71081998000300008 |
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| Registros recuperados: 242 | |
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