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Chilean fishing law, maximum sustainable yield, and the stock-recruitment relationship

Citation

Wiff, R and Quiroz, JC and Neira, S and Gacitua, S and Barrientos, MA, Chilean fishing law, maximum sustainable yield, and the stock-recruitment relationship, Latin American Journal of Aquatic Research, 44, (2) pp. 380-391. ISSN 0718-560X (2016) [Refereed Article]


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Licensed under Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Unported (CC BY-NC-ND 3.0) https://creativecommons.org/licenses/by-nc-nd/3.0/

DOI: doi:10.3856/vol44-issue2-fulltext-19

Abstract

During 2013, the Chilean fishing law was amended to incorporate, among other change, the maximum sustainable yield (MSY) as target reference point for managing fishery resources. This mandate triggered the estimation of MSY-based reference points (RPs) in each fishery subject to catch limits in Chile. Recent investigations indicate that production models provide MSY-based RPs, which are predicted only by using the steepness of the stock-recruitment relationship (h). In this paper, we compare predicted MSY-based RPs using production models with estimates from an age-structured per-recruit model for eleven demersal stocks harvested in Chile. The MSY-based RPs assessed were: 1) The ratio between the biomass leading to MSY to the unfished biomass (Formula presented) the ratio between the fishing mortality that gives the MSY and natural mortality (Formula presented) the ratio of spawning biomass per recruit (SR) when the population is fished at Fmsy to the spawning biomass per recruit of an unfished population (Formula presented). The production model provides (Formula presented) and SPRmsy that well predicted estimates from the age-structured models in most of the species analyzed. However, (Formula presented) was overestimated by the production model in most of the stocks. We discuss the dependence of h with the MSY-based RPs in light of the Chilean fishing law. This paper reveals the complexity of implementing the Chilean Fishing Law into real situations and the uncertainty surrounding the estimation of h and, by extension, MSY and MSY-based RPs.

Item Details

Item Type:Refereed Article
Keywords:MSY, steepness, stock-recruitment function, fisheries management, demersal fish stocks, Chilean fisheries
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:Quiroz, JC (Mr Juan Quiroz Espinosa)
ID Code:114668
Year Published:2016
Deposited By:Centre for Fisheries and Aquaculture
Deposited On:2017-02-23
Last Modified:2017-05-17
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