Event Title
Changes in Lake Trout Population Dynamics Due to the Impact of Introduced Desirable Non-Native Salmonids.
Presentation Type
Oral and/or Visual Presentation
Presenter Major(s)
Natural Resource Management
Mentor Information
C. "Griff" Griffin, griffinc@gvsu.edu
Department
Biology
Location
Kirkhof Center 1104
Start Date
13-4-2011 2:30 PM
End Date
13-4-2011 3:00 PM
Keywords
Environment
Abstract
In the Great Lakes; population dynamics are changing due to introduction of desirable non-native salmonids such as rainbow trout, chinook and coho salmon. Length/age relationship data from the Ontario Ministry of Fisheries, Little River Band of Ottawa Indians and MDNRE, were analyzed to explore changes in lake trout population structure. Indicators of these changes include, slower growth rates, smaller age classes and lower individual frequency than water bodies where desirable non-native salmonids do not exist. A control lake was identified to explore lake trout populations that do not have to compete with desirable non-native salmonids. Cross examination of Lake Nipigon, the control lake, with trout populations from Lake Michigan and Lake Superior can provide better understanding of the impact non-native species introduction has had Great Lakes lake trout population structure.
Changes in Lake Trout Population Dynamics Due to the Impact of Introduced Desirable Non-Native Salmonids.
Kirkhof Center 1104
In the Great Lakes; population dynamics are changing due to introduction of desirable non-native salmonids such as rainbow trout, chinook and coho salmon. Length/age relationship data from the Ontario Ministry of Fisheries, Little River Band of Ottawa Indians and MDNRE, were analyzed to explore changes in lake trout population structure. Indicators of these changes include, slower growth rates, smaller age classes and lower individual frequency than water bodies where desirable non-native salmonids do not exist. A control lake was identified to explore lake trout populations that do not have to compete with desirable non-native salmonids. Cross examination of Lake Nipigon, the control lake, with trout populations from Lake Michigan and Lake Superior can provide better understanding of the impact non-native species introduction has had Great Lakes lake trout population structure.