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Ecosystem effects of invertebrate fisheries

Citation

Eddy, TD and Lotze, HK and Fulton, EA and Coll, M and Ainsworth, CH and de Araujo, JN and Bulman, CM and Bundy, A and Christensen, V and Field, JC and Gribble, NA and Hasan, M and Mackinson, S and Townsend, H, Ecosystem effects of invertebrate fisheries, Fish and Fisheries, 18, (1) pp. 40-53. ISSN 1467-2960 (2017) [Refereed Article]

Copyright Statement

Copyright 2016 John Wiley & Sons Ltd.

DOI: doi:10.1111/faf.12165

Abstract

Since the 1950s, invertebrate fisheries catches have rapidly expanded globally to more than 10 million tonnes annually, with twice as many target species, and are now significant contributors to global seafood provision, export, trade and local livelihoods. Invertebrates play important and diverse functional roles in marine ecosystems, yet the ecosystem effects of their exploitation are poorly understood. Using 12 ecosystem models distributed worldwide, we analysed the trade-offs of various invertebrate fisheries and their ecosystem effects as well as ecological indicators. Although less recognized for their contributions to marine food webs, our results show that the magnitude of trophic impacts of invertebrates on other species of commercial and conservation interest is comparable with those of forage fish. Generally, cephalopods showed the strongest ecosystem effects and were characterized by a strong top-down predatory role. Lobster, and to a lesser extent, crabs, shrimp and prawns, also showed strong ecosystem effects, but at lower trophic levels. Benthic invertebrates, including epifauna and infauna, also showed considerable ecosystem effects, but with strong bottom-up characteristics. In contrast, urchins, bivalves, and gastropods showed generally lower ecosystem effects in our simulations. Invertebrates also strongly contributed to benthic–pelagic coupling, with exploitation of benthic invertebrates impacting pelagic fishes and vice versa. Finally, on average, invertebrates produced maximum sustainable yield at lower levels of depletion (~45%) than forage fish (~65%), highlighting the need for management targets that avoid negative consequences for target species and marine ecosystems as a whole.

Item Details

Item Type:Refereed Article
Keywords:invertebrate fisheries, ecosystem effects, ecosystem models
Research Division:Agricultural and Veterinary Sciences
Research Group:Fisheries Sciences
Research Field:Aquatic Ecosystem Studies and Stock Assessment
Objective Division:Animal Production and Animal Primary Products
Objective Group:Fisheries - Wild Caught
Objective Field:Fisheries - Wild Caught not elsewhere classified
Author:Fulton, EA (Dr Elizabeth Fulton)
ID Code:114502
Year Published:2017
Web of Science® Times Cited:1
Deposited By:Centre for Fisheries and Aquaculture
Deposited On:2017-02-16
Last Modified:2017-11-14
Downloads:0

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