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

作　　者：Jessica Shannon Nathan Huysman Jill M. Voorhees Eric Krebs Michael E. Barnes 

机构地区：[1]Department of Game, Fish and Parks, McNenny State Fish Hatchery, Spearfish, South Dakota, USA

出　　处：《Open Journal of Applied Sciences》2020年第4期135-141,共7页应用科学（英文）

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.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.

关 键 词：CHINOOK SALMON ONCORHYNCHUS TSHAWYTSCHA MILT Eggs SPAWNING Sperm 

分 类 号：R73[医药卫生—肿瘤]