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142919 - Ocean zoning within a sparing versus sharing framework.pdf (1.42 MB)

Ocean zoning within a sparing versus sharing framework

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posted on 2023-05-20, 21:13 authored by McGowan, J, Bode, M, Holden, MH, Davis, K, Nils KrueckNils Krueck, Beger, M, Yates, KL, Possingham, HP
The land-sparing versus land-sharing debate centers around how different intensities of habitat use can be coordinated to satisfy competing demands for biodiversity persistence and food production in agricultural landscapes. We apply the broad concepts from this debate to the sea and propose it as a framework to informmarine zoning based on three possible management strategies, establishing: no-take marine reserves, regulated fishing zones, and unregulated open-access areas. We develop a general model that maximizes standing fish biomass, given a fixed management budget while maintaining a minimum harvest level. We find that when management budgets are small, sea-sparing is the optimal management strategy because for all parameters tested, reserves are more cost-effective at increasing standing biomass than traditional fisheries management. For larger budgets, the optimal strategy switches to sea-sharing because, at a certain point, further investing to grow the no-take marine reserves reduces catch below the minimum harvest constraint. Our intention is to illustrate how general rules of thumb derived from plausible, single-purpose models can help guide marine protected area policy under our novel sparing and sharing framework. This work is the beginning of a basic theory for optimal zoning allocations and should be considered complementary to the more specific spatial planning literature for marine reserve as nations expand their marine protected area estates.

History

Publication title

Theoretical Ecology

Volume

11

Pagination

245-254

ISSN

1874-1738

Department/School

Institute for Marine and Antarctic Studies

Publisher

Springer Netherlands

Place of publication

Netherlands

Rights statement

Copyright 2018 the authors. Licensed under Creative Commons Attribution 4.0 International (CC BY 4.0) https://creativecommons.org/licenses/by/4.0/

Repository Status

  • Open

Socio-economic Objectives

Wild caught fin fish (excl. tuna); Coastal or estuarine biodiversity

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