Here is some video of Coho spawning at Thompson Creek provided courtesy of Conservationist and Board Member Extraordinaire Jeffrey Gottfried. Here is Jeffrey's description of the action:
As this footage begins, notice that there is a female and male pair. This male thinks that he has it made: he has followed this female upstream and is not lined up next to her ready to spawn. But wait a minute! An intruder, a larger redder, more handsome/fitter/studlier male suddenly shows up on the scene and squeezes himself between the femaie and male. He then bites the male, pushes him aside and them bites him again and drives him off-no genes in the next generation for him!
This footage illustrates how in the wild, the fittest male gets to spawn. In a hatchery, a person decides which genes make it to the next generation without regard to fitness
The Tualatin Valley Chapter of Trout Unlimited meets on the second Wednesday of each month at the Lucky Labrador Public House located at 7675 SW Capitol Hwy [Multnomah Village]. Meetings begin at 6:30pm and are free and open to the public. We sponsor a wide range of program speakers, conservation efforts and club events. This blog is dedicated to sharing information about our many club activities.