Feeding ofAcanthocylops robustus on zooplankton |
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Authors: | Yang Yu-feng Zdeněk Brandl |
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Institution: | (1) Institute of Hydrobiology, Chinese Academy of Sciences, 430072 Wuhan;(2) Hydrobiological Institute, Czech Academy of Sciences, Bedějovice, Czech Republic |
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Abstract: | Feeding of freshwater cyclopoid copepodAcanthocyclops robustus on zooplankton was examined by a senes of feeding experiments during August–September of 1993. Study results showedA. robustus can capture and eat all type items provided from the Stary Haklovsky fishpond, a shallow eutrophic water body near Budějovice
City, Czech Republic. Selection by the predator was determined largely by prey body-size and density, but was also affected
by prey types. Variable but significant changes in feeding rates were found in various size distribution and concentration
of prey types. Percentages of small (80–235μm) and large (445–610μm) prey consumed were 42.47 and 3.85%, respectively. Starvation
did not cause statistically significant difference. The feeding onCeriodaphnia quadrangula showed significant difference between large and small prey. Feeding rate increased with increasing prey concentration. |
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Keywords: | feeding zooplankton body-size concentration behavior prey types |
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