Investigations into the Food Selectivity of the Planktic Crustaceans Daphnia hyalina, Eudiaptomus gracilis and Cyclops vicinus

✍ Scribed by Dr. Wolfgang Horn

• Book ID: 102870123
• Publisher: John Wiley and Sons
• Year: 1985
• Tongue: English
• Weight: 505 KB
• Volume: 70
• Category: Article
• ISSN: 1434-2944
• DOI: 10.1002/iroh.19850700412

✦ Synopsis

The food selectivity of Daphniu hyalinu, Eudiaptomus grncilis and Cyclops vicinus was investigated in laboratory experiments using algae of different sizes and a t different concentrations as food sources. VANDERPLOEG and SCAVIA'S (1979 a, b) coefficient, which is most suitable for characterising selectivity, was selected from the literature and used to analyze the results. None of the three species was found t o feed selectively, however. The results show, on the other hand, that the leaky-sieve model can be used to describe the feeding patterns of these species. There were clear differences between the particle size ranges consumed by our experimental species, and these showed that, during the experiments, Daphnia hyalina acted as a microfilter-feeder, whereas Zudiaptomus gtw,cilis and Cyclops vicinus acted as macrofilter-feeders.