Sea lamprey wounding in Canadian waters of Lake Huron from 2000 to 2009: Temporal changes differ among regions |
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| Authors: | David V. McLeod R. Adam Cottrill |
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| Affiliation: | a Department of Biology, University of Western Ontario, 1151 Richmond Street N. London, ON, Canada N6A 5B7b R. Adam Cottrill, Ontario Ministry of Natural Resources, Upper Great Lakes Management Unit, 1450 7th Ave. East, Owen Sound, ON, Canada N4K 2Z1c Yolanda E. Morbey, Department of Biology, University of Western Ontario, 1151 Richmond Street N. London, ON, Canada N6A 5B7 |
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| Abstract: | Lake Huron has undergone a number of substantial changes in recent years, including changes to management of the parasitic sea lamprey, Petromyzon marinus. While control strategies of lamprey involving lampricides have had some success, lamprey spawning in St. Marys River has been a major and persistent problem and has led to intensified treatment beginning in 1998. The objective of our study was to broadly examine lamprey spatial wounding dynamics of lake whitefish (Coregonus clupeaformis) and lake trout (Salvelinus namaycush) within the Canadian waters of Lake Huron from 2000 to 2009. Temporal trends were evident and these differed among regions (North Channel, northern Main Basin, southern Main Basin, northern Georgian Bay, and southern Georgian Bay). There was a monotonic annual increase in probability of wounding for both lake trout and lake whitefish in three of the five regions, with high increases seen in both northern and southern Georgian Bay. The increases in three of the five regions are unexpected given the ongoing treatment of St. Marys River. |
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| Keywords: | Sea lamprey Lake Huron Lake whitefish Lake trout Generalized linear model |
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