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Chemosensory cues attract lake trout Salvelinus namaycush and an egg predator to the spawning substratum |
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| Authors: | B A Wasylenko P J Blanchfield G G Pyle |
| Institution: | 1. Department of Biology, Lakehead University, , Thunder Bay, ON, P7B 5E1 Canada;2. Experimental Lakes Area, 501 University Crescent Fisheries and Oceans Canada, , Winnipeg, MB, R3T 2N6 Canada;3. Department of Biological Sciences, University of Lethbridge, , Lethbridge, AB, T1K 3M4 Canada |
| Abstract: | A field experiment was conducted to determine whether chemosensory cues emanating from lake trout Salvelinus namaycush spawning substratum attract breeding S. namaycush. Substrata from either a spawning site or a control site were randomly placed in trap nets around an isolated spawning shoal; those containing spawning substratum caught significantly more S. namaycush, as well as a greater proportion in breeding condition. White sucker Catostomus commersoni were a major predator of S. namaycush eggs and were also captured in greater numbers in nets with spawning substratum. |
| Keywords: | Catostomus commersoni field experiment homing olfaction salmonid |