TITLE:
Effect of Activated Milt Residence Time on Landlocked Fall Chinook Salmon Egg Survival
AUTHORS:
Jessica Shannon, Nathan Huysman, Jill M. Voorhees, Eric Krebs, Michael E. Barnes
KEYWORDS:
Chinook Salmon, Oncorhynchus tshawytscha, Milt, Eggs, Spawning, Sperm
JOURNAL NAME:
Open Journal of Applied Sciences,
Vol.10 No.4,
April
20,
2020
ABSTRACT: 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.