Opponent:
This thesis concerns the ecology of sympatric whitefish (Coregonus lavaretus (L.)) forms in a subarctic lake, northern Finland. Despite of rather common occurrence of sympatric whitefish forms in the northern hemisphere, limited amount of information exist about their ecology and morphological diver...
| Main Authors: | , , , |
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| Format: | Text |
| Language: | English |
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| Online Access: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.413.8212 http://ethesis.helsinki.fi/julkaisut/bio/bioja/vk/kahilainen/ecologyo.pdf |
| Summary: | This thesis concerns the ecology of sympatric whitefish (Coregonus lavaretus (L.)) forms in a subarctic lake, northern Finland. Despite of rather common occurrence of sympatric whitefish forms in the northern hemisphere, limited amount of information exist about their ecology and morphological divergence. Furthermore, whitefish form data is usually gathered in various different lakes and collective studies of the various ecological aspects in a single lake has been scarce. Thus, this thesis focuses on the ecology of sympatric whitefish forms in Lake Muddusjärvi. The main objectives were to examine the level of morphological divergence, morphometry-feeding environment relationship and niche segregation of sympatric whitefish forms. In addition, the impacts of predation on sympatric whitefish forms were evaluated. Morphometric and meristic analyses indicated divergence of whitefish population into three distinct forms. The most pronounced differences between sympatric whitefish forms were |
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