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Published on: September 16, 2018
Egg size and growth in steelhead Oncorhynchus mykiss
Katharine E Self1,2, Carl B Schreck1, Karen M Cogliati1
1Department of Fisheries and Wildlife, Oregon State University, Corvallis, Oregon.
Abstract:
The effects of egg size on early development and growth of steelhead Oncorhynchus mykiss were recorded for more than 200 days following hatching. Fish from smaller eggs hatched sooner and at a smaller size than fish from larger eggs, but fish from smaller eggs showed consistently higher growth rates than fish from larger eggs. Since many life-history attributes appear to be determined by size or growth rate at age during the first year, egg size could be a significant predictor of important changes in the life history of individuals.
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