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Density dependent relative breeding success
Male Atlantic salmon competitively inferior to wild males
1st generation hatchery fish (Cww vs Www)
Relative breeding success lower at higher density
Notes:
If these findings that competition during breeding favors natural-origin fish apply more broadly …
Then, 1) concerns with competition on the spawning grounds is probably diminished, 2) hatchery fish should be expected to perform better when densities of natural spawners are low, and 3) may give us insight into mechanisms causing reduced fitness of hatchery fish.