Graduate Thesis Or Dissertation

 

Marine Heatwaves Influence Depth Preferences of Chinook Salmon (Oncorhynchus tshawytscha) Public Deposited

Downloadable Content

Download PDF
https://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/mp48sm36k

Descriptions

Attribute NameValues
Creator
Abstract
  • Marine heatwaves have become more common over the past several years. The 2014-2015 ‘warm blob’ had profound effects on marine ecosystems in the Northeast Pacific. Given the particular habitat needs of Chinook Salmon (Oncorhynchus tshawytscha) we wanted to examine the impacts of the heatwave on Chinook depth distribution. We examined fishery and temperature data from 2012-2015; the two years preceeding the heatwave and the two years during the heatwave. A mixed effects model indicated that extended periods of anomalous temperatures caused increased depth of capture. All stocks included in the study showed significant differences in their response to this heatwave. Oceanographic factors were also a major variable, with downwelling resulting in deeper depths of capture, depending on the intensity and length of expression of alternate states. There was also an observed general pattern that salmon preferred greater depths in the later summer months. While this finding is supported by limited other literature, more research is necessary in order to better predict how chinook will react to heatwaves in the future.
Contributor
License
Resource Type
Date Issued
Degree Level
Degree Name
Degree Field
Degree Grantor
Commencement Year
Advisor
Committee Member
Citation
  • Teahan, A. J, Bellinger, M. R., Miller, S., Banks, M. A. (2020) Marine Heatwaves Influence Depth Preferences of Chinook Salmon (Oncorhynchus tshawytscha)
Academic Affiliation
Non-Academic Affiliation
Subject
Rights Statement
Publisher
Peer Reviewed
Language

Relationships

Parents:

This work has no parents.

In Collection:

Items