In several recent posts we have discussed the concept of density dependence and how it is used in fisheries management. Today we dive in deeper and talk about the stock-recruitment relationship, density dependence, and how the results of such models are applied to managing steelhead. First, let’s define some terms. Stock refers to, in this context, a population of …
Frank Moore Steelhead Sanctuary
The story of Frank and Jeanne Moore has gained deserved attention in the past few years- from Frank’s service on the beaches of Normandy during WWII to his enduring love for both his wife and the North Umpqua River, to Jeanne’s stewardship as a botanist in the Umpqua basin. If you’re lucky enough to have fished the North Umpqua, you’ve …
Science Friday: Juvenile Density, Distribution and Habitat Capacity
By John McMillan New Year, new Science Friday! Last week we looked at the concept of carrying capacity, how it is estimated, and the most important habitat factors used to come up with those estimations. This week we shift gears a bit and review studies that illuminate how patterns in fish distribution can affect assumptions about carrying capacity. Recall …
Science Friday: The habitat that steelhead prefer, and how we use it to estimate capacity of rivers
By John McMillan How many steelhead can you fit into a given watershed? Put another way, what is the carrying capacity of a given watershed for steelhead? This question, and its answer, are important for steelhead fishery managers, and anglers, as we collectively try to rebuild wild fish runs up and down the West Coast. To be clear, we …
Stand up for the Methow
Dear fellow anglers, I am writing to urge you to use the attached link to access a petition letter from our coalition partners “Methow Headwaters”. This letter with signatures will be printed and submitted to the USFS as a part of the comment period for the 20 year mineral withdrawal in the Methow Valley. A proposed copper …
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