ISSN:
1573-5133
Keywords:
Grazing
;
Growth
;
Green alga
;
Blue-green alga
;
Anabaena
;
Chlamydomonas Synopsis
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
Notes:
Synopsis Juvenile blue tilapia, Oreochromis aureus, consume both the motile green alga, Chlamydomonas sp., and the filamentous blue-green alga, Anabaena sp. Results from a grazing experiment showed little difference between the densities of grazed and ungrazed populations of Chlamydomonas, but did show a decrease in density and growth rate in the grazed Anabaena population relative to an ungrazed population. Tilapia ingesting Chlamydomonas lost weight, similar to the weight loss of unfed control fish. However, fish fed Anabaena gained weight. This study provides further evidence that blue tilapia grazing may structure phytoplankton communities directly, and their grazing could shift phytoplankton communities from dominance by large blue-green algae towards dominance by green algae.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00000362
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