i
Reframing Steelhead Migration Behavior: A Population Perspective on Migration Rate and Survival Through the Columbia and Snake Rivers
-
2021
-
[PDF-3.04 MB]
Details:
-
Personal Author:
-
Corporate Authors:
-
NOAA Program & Office:
-
Description:To investigate population-specific migration behavior and survival from Bonneville Dam to McNary Dam on the lower Columbia River, we studied 40,209 summer-run steelhead that had been individually tagged as juveniles and were detected during the 2004–16 adult migrations. To quantify the sensitivity of these behaviors to environmental and anthropogenic influences, we used mark–release–recapture models, generalized linear models, and two-dimensional mixture models. We found distinct patterns in exposure to high river temperature, harvest, and survival related to different migration behavior of steelhead from the Upper Columbia, Snake River, and Middle Columbia River distinct population segments (DPSes). Life history variation resulted from different combinations of early and late arrival timing at Bonneville Dam, slow and fast travel times to McNary Dam, and years spent in the ocean (ocean age).
-
Keywords:
-
Series:
-
DOI:
-
Document Type:
-
Place as Subject:
-
Rights Information:Public Domain
-
Compliance:Submitted
-
Main Document Checksum:
-
Download URL:
-
File Type:
