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Predictions from simple predator-prey theory about impacts of harvesting forage fishes

Citation

Walters, C and Christensen, V and Fulton, B and Smith, ADM and Hilborn, R, Predictions from simple predator-prey theory about impacts of harvesting forage fishes, Ecological Modelling, 337 pp. 272-280. ISSN 0304-3800 (2016) [Refereed Article]

Copyright Statement

Copyright 2016 Elsevier B.V.

DOI: doi:10.1016/j.ecolmodel.2016.07.014

Abstract

Simple predator-prey models make widely divergent predictions about impact on piscivores of harvesting forage fish species, depending on structural assumptions about the fine-scale spatial structure of trophic interactions (presence or absence of foraging arena structure in prey availability) and about limitation in predator or prey recruitment due to foraging and habitat restrictions on early juvenile survival. This sensitivity to structural assumptions warns us about possible mistakes that can arise in much more complex and realistic models, where we have to make equivalent assumptions. Recruitment limitation implies risk of depensatory impact on forage species as fishing rate on these species increases, with attendant risk of development of predator-prey cycles and strong responses to relatively small changes in basic forage fish productivity due to environmental factors.

Item Details

Item Type:Refereed Article
Keywords:fisheries, forage fish, predator prey models, ecosystem models, depensatory mortality, Atlantis, Ecosim
Research Division:Agricultural and Veterinary Sciences
Research Group:Fisheries Sciences
Research Field:Aquatic Ecosystem Studies and Stock Assessment
Objective Division:Environment
Objective Group:Ecosystem Assessment and Management
Objective Field:Ecosystem Assessment and Management of Marine Environments
Author:Fulton, B (Dr Elizabeth Fulton)
Author:Smith, ADM (Dr Tony Smith)
ID Code:118315
Year Published:2016
Web of Science® Times Cited:6
Deposited By:Directorate
Deposited On:2017-07-10
Last Modified:2018-05-09
Downloads:0

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