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Unintended cultivation, shifting baselines, and conflict between objectives for fisheries and conservation

Citation

Brown, CJ and Trebilco, R, Unintended cultivation, shifting baselines, and conflict between objectives for fisheries and conservation, Conservation Biology, 28, (3) pp. 677-688. ISSN 0888-8892 (2014) [Refereed Article]

Copyright Statement

© 2014 Society for Conservation Biology

DOI: doi:10.1111/cobi.12267

Abstract

The effects of fisheries on marine ecosystems, and their capacity to drive shifts in ecosystem states, have been widely documented. Less well appreciated is that some commercially valuable species respond positively to fishing-induced ecosystem change and can become important fisheries resources in modified ecosystems. Thus, the ecological effects of one fishery can unintentionally increase the abundance and productivity of other fished species (i.e., cultivate). We reviewed examples of this effect in the peer-reviewed literature. We found 2 underlying ecosystem drivers of the effect: trophic release of prey species when predators are overfished and habitat change. Key ecological, social, and economic conditions required for one fishery to unintentionally cultivate another include strong top–down control of prey by predators, the value of the new fishery, and the capacity of fishers to adapt to a new fishery. These unintended cultivation effects imply strong trade-offs between short-term fishery success and conservation efforts to restore ecosystems toward baseline conditions because goals for fisheries and conservation may be incompatible. Conflicts are likely to be exacerbated if fisheries baselines shift relative to conservation baselines and there is investment in the new fishery. However, in the long-term, restoration toward ecosystem baselines may often benefit both fishery and conservation goals. Unintended cultivation can be identified and predicted using a combination of time-series data, dietary studies, models of food webs, and socioeconomic data. Identifying unintended cultivation is necessary for management to set compatible goals for fisheries and conservation.

Item Details

Item Type:Refereed Article
Keywords:cultivation, habitat modification, over-fishing, predation, social–ecological systems, stable state, trophic cascade
Research Division:Agricultural and Veterinary Sciences
Research Group:Fisheries Sciences
Research Field:Fisheries Management
Objective Division:Environment
Objective Group:Ecosystem Assessment and Management
Objective Field:Ecosystem Assessment and Management of Coastal and Estuarine Environments
Author:Trebilco, R (Dr Rowan Trebilco)
ID Code:101963
Year Published:2014
Web of Science® Times Cited:15
Deposited By:CRC-Antarctic Climate & Ecosystems
Deposited On:2015-07-21
Last Modified:2017-11-04
Downloads:0

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