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The relative importance of environmental stochasticity, interspecific interactions, and observation error: Insights from sardine and anchovy landings

Citation

Hosack, GR and Trenkel, VM and Dambacher, JM, The relative importance of environmental stochasticity, interspecific interactions, and observation error: Insights from sardine and anchovy landings, Journal of Marine Systems, 125 pp. 77-89. ISSN 0924-7963 (2017) [Refereed Article]

Copyright Statement

2012 Elsevier B.V. All rights reserved.

DOI: doi:10.1016/j.jmarsys.2012.09.003

Abstract

Long-term time series of sardine and anchovy landings often suggest negative dependence between these species, and an array of mechanisms have been proposed as explanations. We reduce these propositions to four basic hypotheses of (1) independence, (2) correlated process noise, (3) interspecific interactions, and (4) correlated observational error. We use a Bayesian approach to develop priors for parsimonious state space models with both process noise and observation error that represent each of these hypotheses, and apply this approach to five long-term time series of landings collected from the Pacific and Atlantic Oceans. Model comparison criteria suggest that the hypothesis of correlated process noise has the broadest support, where the temporal dependence of anchovy and sardines may be caused in part by either direct environmental influence on their physiology, or indirect bottom-up effects on their prey. However, all hypotheses find some degree of support within the five time series, and in general, the sardine and anchovy landings suggest weak intraspecific density dependence and susceptibility to both environmental and anthropogenic perturbation. Results additionally suggest that the best fitting hypothesis depends on the choice of geographic scale, temporal scale, and stock definition of the recorded landings.

Item Details

Item Type:Refereed Article
Keywords:Adaptive Metropolis, Bayes factors DIC, Gompertz model, hyperstability, kalman filter, model comparison, reactivity, small pelagic fishes, stability
Research Division:Agricultural and Veterinary Sciences
Research Group:Fisheries Sciences
Research Field:Fisheries Management
Objective Division:Animal Production and Animal Primary Products
Objective Group:Fisheries - Wild Caught
Objective Field:Fisheries - Wild Caught not elsewhere classified
Author:Dambacher, JM (Dr Jeffrey Dambacher)
ID Code:118942
Year Published:2017 (online first 2013)
Web of Science® Times Cited:3
Deposited By:Zoology
Deposited On:2017-07-24
Last Modified:2017-10-23
Downloads:0

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