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Jill M. Voorhees
South Dakota Game, Fish and Parks, McNenny State Fish Hatchery 19619 Trout Loop, Spearfish, South Dakota, USA
Publications
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Research Article
Evaluation of Stirring during Artificial Spawning of Landlocked Fall Chinook Salmon
Author(s): David Cook, Jill M. Voorhees* and Michael E. Barnes
Stirring eggs and milt during artificial spawning of salmonids is a well-established practice. However, it has not been objectively evaluated. This experiment compared egg survival of spawns of landlocked fall Chinook salmon (Oncorhynchus tshawytscha) that were either stirred with a turkey (Meleagris gallopavo) tail feather or unstirred during sperm activation. There was no significant difference in egg survival to the eyed-stage of development between the two treatments, with mean percent (SE) survival in the stirred eggs at 44.6% (7.4) compared to 42.9% (5.8) in the unstirred eggs. Mean percent (SE) survival to hatch was also not significantly different for stirred eggs at 40.0% (7.1) compared to unstirred eggs at 39.1% (6.0). Based on the results of this study, stirring landlocked fall Chinook salmon eggs and milt during sperm activation is unnecessary an.. View more»