Effects of light on size-selectivity of kokanee feeding on Daphnia |
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| Authors: | M L Koski B M Johnson T M Stecklein |
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| Institution: | Department of Fishery and Wildlife Biology, Colorado State University, Fort Collins, CO 80523-1474, U.S.A. |
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| Abstract: | Planktivory by fingerling kokanee Oncorhynchus nerka feeding on Daphnia became more size-selective with increased illumination (0·1 v . 15 lux). The average difference in length of Daphnia ( D. pulex and D. galeata ) in trial arenas before and after kokanee feeding was 0·107 mm ( P = 0·0007) at 0·1 lux and 0·371 mm ( P < 0·0001) at 15 lux. |
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| Keywords: | Oncorhynchus nerka planktivory size-selective predation |
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