North Pacific Anadromous Fish Commission

Technical Report 11

Table of Contents

An Evaluation of the Influence of Stock Abundance and Global Temperature Anomaly on Pacific Salmon Body Weight in the North Pacific Ocean

Authors:
Alexander V. Bugaev and Vladimir I. Radchenko

Abstract Excerpt:
The objective of this study is an evaluation of the relationships between Pacific salmon stock abundance, water temperature anomalies, and Pacific salmon body weight to determine a main salmon growth driving factor during their marine phase. Relationships between Pacific salmon catch values (1961–2015) as a stock abundance index, the Northern Hemisphere Land and Sea Surface Temperature Anomaly Index (N.HEMI+dSST), and salmon body weight in commercial catches of the North Pacific countries (Table 1) were assessed using stepwise multiple regression analysis. The temperature anomaly index values are calculated in correspondence with the marine phase duration of Pacific salmon species: two-year averaging is used for pink and coho salmon, four-year averaging is used for chum, sockeye, and Chinook (Bugaev 2017).

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DOI:
https://doi.org/10.23849/npafctr11/103.106

Citation

Bugaev, A.V., and V.I. Radchenko.  2018.  An evaluation of the influence of stock abundance and global temperature anomaly on Pacific salmon body weight in the North Pacific Ocean.  N. Pac. Anadr. Fish Comm. Tech. Rep. 11: 103–106.  https://doi.org/10.23849/npafctr11/103.106