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Vertical distribution and diel migration of rotifers in a Parana River floodplain lake

✍ Scribed by SusanaJose Paggi

Publisher
Springer
Year
1995
Tongue
English
Weight
506 KB
Volume
310
Category
Article
ISSN
1573-5141

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✦ Synopsis

The vertical distribution of zooplankton rotifers in the open waters of Laguna El Tigre was investigated. Rotifers showed a relatively uniform distribution throughout the water column. This pattern of distribution was maintained during the year and did not show variations in relation to hydrologic phases of inundation and isolation of the lake. Diel vertical migration of rotifers from the limnetic and the littoral area was investigated too. In littoral area rotifers exhibited a reverse migration, whereas in the limnetic the movements were less conspicuous. Horizontal migration was observed too, and there were interactions between horizontal and vertical distribution. Predation and competition offer a possible explanation.

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