Prey selection by Chaoborus punctipennis under laboratory conditions |
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Authors: | Robert W. Winner Jack S. Greber |
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Affiliation: | (1) Department of Zoology, Miami University, Ohio, U.S.A. |
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Abstract: | Equal numbers of Diaphanosoma leuchtenbergianum, Daphnia parvula, and Diaptomus pallidus were offered to individual, fourth-instar larvae of Chaoborus punctipennis. When the prey species were presented separately to the larvae, 100% of the Diaphanosoma, 67% of the Daphnia, and 57% of the Diaptomus were consumed. However, when the three species were offered to the predator concurrently, 90% of the Diaphanosoma, 10% of the Daphnia and < 1% of the Diaptomus were eaten. This strong selection for Diaphanosoma was consistent at three prey densities. |
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Keywords: | Chaoborus punctipennis predation prey selection |
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