Potential Implications of increased precocialism- Ecological
- Predation pressure
- Increased competition for available resources
- Genetic
- Propagation of undesirable traits
- Decrease in genetic variability
- Harvest
- Decreased sport and commercial harvest
- Interference with resident sport fisheries
Abundance- Mean abundance by age and origin on the spawning grounds
- Precocious males per spawning female
- Correlates with precocious male abundance
Summary
- Natural origin precociously mature males are more abundant on the spawning grounds
- Environmental conditions and hatchery release numbers both appear to regulate hatchery origin abundance in some years
- Hatchery origin precocious males are predominantly in areas of low spawning density
- Hatchery precocious males are larger and appear to dominate interactions with natural production precocious males
Acknowledgements
- BPA – Patty Smith, David Byrnes
- WDFW – Timothy Webster, Zack Mays, Anthony Fritts, Natalia Pitts, Joshua Rogala, Jennifer Novak, Molly Kelly, Paul Edwards, Elliott Ilgenfritz, Gabriel Stotz, Trenton DeBoer
- YN – Mark Johnston, Bill Bosch, and Redd crews
- NOAA – Don Larsen
- Cascade Aquatics – Paul James, Keith Pitts, Tyler Forman, Corene Luton, Marlene Farrell, Devona Ensmenger, and David Childs