Is bigger really better? Towards improved models for testing how Atlantic salmon Salmo salar smolt size affects marine survival

A general framework is presented that should enhance our understanding of how intrinsic factors, such as body size, and extrinsic factors, such as climate, affect the dynamics and demographics of fish populations. Effects of intrinsic factors, notably studies relating juvenile Atlantic salmon Salmo...

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Bibliographic Details
Published in:Journal of fish biology 2018-03, Vol.92 (3), p.579-592
Main Authors: Gregory, S. D., Armstrong, J. D., Britton, J. R.
Format: Article
Language:English
Subjects:
Bayesian
Body size
Demographics
Demography
Dynamics
Fish
Fish populations
Frameworks
Freshwater fishes
lifecycle
Marine fishes
migration
Probability theory
Salmo salar
Salmon
smolt body size
Smolts
state‐space model
Survival
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Summary:A general framework is presented that should enhance our understanding of how intrinsic factors, such as body size, and extrinsic factors, such as climate, affect the dynamics and demographics of fish populations. Effects of intrinsic factors, notably studies relating juvenile Atlantic salmon Salmo salar body size to their probability to return as an adult, are often context‐dependent and anecdotal, due to data constraints. By merit of its flexible specification, this framework should admit datasets with a range of situation‐specific nuances, collected using different approaches, and thereby deliver more general and robust findings for more effective population management.
ISSN:0022-1112
1095-8649
DOI:10.1111/jfb.13550