Diversification insulates fisher catch and revenue in heavily exploited tropical fisheries.

Abstract:

:Declines in commercial landings and increases in fishing fleet power have raised concerns over the continued provisioning of nutritional and economic services by tropical wild fisheries. Yet, because tropical fisheries are often data-poor, mechanisms that might buffer fishers to declines are not understood. This data scarcity undermines fisheries management, making tropical fishing livelihoods particularly vulnerable to changes in marine resources. We use high-resolution fisheries data from Seychelles to understand how fishing strategy (catch diversification) influences catch rates and revenues of individual fishing vessels. We show that average catch weight decreased by 65% over 27 years, with declines in all nine species groups coinciding with increases in fishing effort. However, for individual vessels, catch diversity was associated with larger catches and higher fishing revenues and with slower catch declines from 1990 to 2016. Management strategies should maximize catch diversity in data-poor tropical fisheries to help secure nutritional security while protecting fishing livelihoods.

journal_name

Sci Adv

journal_title

Science advances

authors

Robinson JPW,Robinson J,Gerry C,Govinden R,Freshwater C,Graham NAJ

doi

10.1126/sciadv.aaz0587

subject

Has Abstract

pub_date

2020-02-21 00:00:00

pages

eaaz0587

issue

8

issn

2375-2548

pii

aaz0587

journal_volume

6

pub_type

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