Effect of Activated Milt Residence Time on Landlocked Fall Chinook Salmon Egg Survival

• 作者: Eric Krebs Jessica Shannon Jill M. Voorhees Michael E. Barnes Nathan Huysman
• 来源期刊: 应用科学(英文)
• 学科: 医学
• 关键词: CHINOOK SALMON ONCORHYNCHUS TSHAWYTSCHA Milt EGGS SPAWNING Sperm
• 年，卷（期）: 2020,（4）
• 页码范围: 135-141
• 页数: 7页
• 分类号: R73

摘要

During artificial spawning of salmonids, activated sperm is allowed to remain in contact with eggs for variable durations. This study examined multiple residence times (20, 40, 60, 90, or 120 seconds) for activated sperm on landlocked fall Chinook salmon (Oncorhynchus tshawytscha) eggs during spawning. There was no significant difference in egg survival to the eyed-stage of development or to hatch among any of the treatments, with a mean (SE) percent survival to the eyed stage of 63.9 (5.8). These results indicate that only relatively short residence times of activated milt on eggs during landlocked fall Chinook salmon spawning are needed to ensure egg survival, resulting in potentially substantial reductions in production-level spawning times and associated labor costs.