Spatial and Temporal Patterns of Covariation in Components of Recruitment of British Columbia and Alaska Sockeye Salmon

Spatial and Temporal Patterns of Covariation in Components of Recruitment of British Columbia and Alaska Sockeye Salmon

Randall M. Peterman, Brian J. Pyper, Michael F. Lapointe, Milo D. Adkison, and Carl J. Walters

Spatial and Temporal Patterns of Covariation in Components of Recruitment of British Columbia and Alaska Sockeye SalmonThis is part of Ecosystem Approaches for Fisheries Management
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Description

Sockeye salmon (Oncorhynchus nerka) populations typically show large year-to-year variation in survival rates, body size at maturity, and age at maturity. To better manage these stocks, it is important to understand the spatial and temporal scales over which environmental processes drive this variation in each component of recruitment. We used a multi-stock comparison to identify these spatial and temporal characteristics of variability
using data from the late 1940s through brood year 1992 returns
for 29 sockeye stocks from a wide geographical area across British Columbia and Alaska: 16 Fraser River stocks (southern British Columbia), the Skeena and Nass River stocks (central British Columbia), the Copper River and Upper Cook Inlet stocks (central Alaska), and 9 Bristol Bay stocks (western Alaska). These stocks overlap to varying degrees during their marine life stage.

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