English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

The probability of size-selective mortality (SSM) after the fi rst summer of marine residency (i.e., the second critical period [SCP]) was evaluated for Yukon River Chinook salmon (Oncorhynchus tshawytscha). Size distributions of fi sh sampled as juveniles and back-calculated from adults were compared to evaluate SSM. Size distribution for juvenile samples at SCP was estimated from fork length (FL) of fi sh collected in the northeastern Bering Sea. Scale radii distributions for adult samples at SCP were estimated using the mean early marine circuli count from available juvenile scales, and back-calculating FL at SCP using a linear regression between juvenile FL and scale radius. A second regression was used to estimate body weight at FL. Size at SCP in the average adult sample (95% confi dence interval of the mean = 163–178 g) was greater than that in the juvenile sample (95% confi dence interval of the mean = 134–140 g), indicating SSM between SCP and sexual maturity. A generalized additive model (GAM) indicated a signifi cant relationship between weight or energy density at SCP and the probability of SSM. These results support the theoretical mechanism of SCP: that SSM in salmon could be attributed to energy density after the fi rst summer in nearshore habitats.

Size-Selective Mortality of Chinook Salmon in Relation to Body Energy after the First Summer in Nearshore Marine Habitats