Henry’s Fork Rainbow Trout migrating to spawn in the Buffalo River have to pass through the fish ladder at the Buffalo River hydroelectric facility to access upstream spawning habitat. At the end of the fish ladder we, HFF, operate a fish trap from early February through the middle of June. Three times a week we check the Buffalo River fish trap and collect data on species, length, sex, and life histories via passive integrated transponders (PIT) tags if one is present.
Here is a quick summary of the collaborative gill lice study that the Henry's Fork Foundation and the Idaho Department of Fish and Game initiated in June, 2016. For background information on this study, check out these links:
The aspens are yellow, the mornings are frosty, and the Brown trout (Salmo trutta) are staging to spawn. Brown trout, like many of their salmonid cousins, migrate from lakes, oceans, or main-stem river reaches to headwater habitat to dig redds (nests in the gravel) and deposit their eggs1. For Brown trout in the Upper Snake River region, many don’t have access to headwater habitat due to hydraulic barriers and will spawn in main-stem river reaches instead.
In June 2016, the Idaho Department of Fish and Game (IDFG) and Henry’s Fork Foundation (HFF) received reports of the presence of gill lice on trout caught within the Henry’s Fork River system. Shortly after, a collaborative effort between HFF and IDFG was underway and we asked anglers and guides to help collect data on the prevalence, severity, and distribution of the parasite within the Upper Snake River region.
My name is Bryce Oldemeyer and I am the newest addition to the full-time staff at HFF. I’m on my fourth week with the Foundation and intend to be around for a while so I’d liked to introduce myself and explain my new role here.