The importance of habitat quality for marine reserve fishery linkages

L D Rodwell; E B Barbier; C M Roberts; T R McClanahan

doi:10.1139/F03-009

The importance of habitat quality for marine reserve fishery linkages

L D Rodwell, E B Barbier, C M Roberts, T R McClanahan

Environment and Geography

Research output: Contribution to journal › Article › peer-review

Abstract

We model marine reserve - fishery linkages to evaluate the potential contribution of habitat-quality improvements inside a marine reserve to fish productivity and fishery catches. Data from Mombasa Marine National Park, Kenya, and the adjacent fishery are used. Marine reserves increase total fish biomass directly by providing refuge from exploitation and indirectly by improving fish habitat in the reserve. As natural mortality of the fish stock decreases in response to habitat enhancement in the reserve, catches increase by up to 2.6 tonnes (t).km(-2).year(-1) and total fish biomass by up to 36 t.km(-2). However, if habitat-quality improvement reduces the propensity of fish to move out of the reserve, catches may fall by up to 0.9 t.km(-2).year(-1). Our results indicate that habitat protection in reserves can underpin fish productivity and, depending on its effects on fish movements, augment catches.

Original language	English
Pages (from-to)	171-181
Number of pages	11
Journal	Canadian Journal of Fisheries and Aquatic Sciences
Volume	60
Issue number	2
DOIs	https://doi.org/10.1139/F03-009
Publication status	Published - Feb 2003

Bibliographical note

Keywords

FISHING MORTALITY
BIOECONOMIC MODEL
UNITED-STATES
CORAL-REEFS
DEGRADATION
ECOSYSTEMS
COMPLEXITY
RECOVERY
DESIGN

Access to Document

10.1139/F03-009

robertscm3.pdf

http://pubs.nrc-cnrc.gc.ca/

Cite this

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title = "The importance of habitat quality for marine reserve fishery linkages",

abstract = "We model marine reserve - fishery linkages to evaluate the potential contribution of habitat-quality improvements inside a marine reserve to fish productivity and fishery catches. Data from Mombasa Marine National Park, Kenya, and the adjacent fishery are used. Marine reserves increase total fish biomass directly by providing refuge from exploitation and indirectly by improving fish habitat in the reserve. As natural mortality of the fish stock decreases in response to habitat enhancement in the reserve, catches increase by up to 2.6 tonnes (t).km(-2).year(-1) and total fish biomass by up to 36 t.km(-2). However, if habitat-quality improvement reduces the propensity of fish to move out of the reserve, catches may fall by up to 0.9 t.km(-2).year(-1). Our results indicate that habitat protection in reserves can underpin fish productivity and, depending on its effects on fish movements, augment catches.",

keywords = "FISHING MORTALITY, BIOECONOMIC MODEL, UNITED-STATES, CORAL-REEFS, DEGRADATION, ECOSYSTEMS, COMPLEXITY, RECOVERY, DESIGN",

author = "Rodwell, {L D} and Barbier, {E B} and Roberts, {C M} and McClanahan, {T R}",

note = "Copyright {\textcopyright} 2003 NRC Canada",

year = "2003",

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AU - Rodwell, L D

AU - Barbier, E B

AU - Roberts, C M

AU - McClanahan, T R

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AB - We model marine reserve - fishery linkages to evaluate the potential contribution of habitat-quality improvements inside a marine reserve to fish productivity and fishery catches. Data from Mombasa Marine National Park, Kenya, and the adjacent fishery are used. Marine reserves increase total fish biomass directly by providing refuge from exploitation and indirectly by improving fish habitat in the reserve. As natural mortality of the fish stock decreases in response to habitat enhancement in the reserve, catches increase by up to 2.6 tonnes (t).km(-2).year(-1) and total fish biomass by up to 36 t.km(-2). However, if habitat-quality improvement reduces the propensity of fish to move out of the reserve, catches may fall by up to 0.9 t.km(-2).year(-1). Our results indicate that habitat protection in reserves can underpin fish productivity and, depending on its effects on fish movements, augment catches.

KW - FISHING MORTALITY

KW - BIOECONOMIC MODEL

KW - UNITED-STATES

KW - CORAL-REEFS

KW - DEGRADATION

KW - ECOSYSTEMS

KW - COMPLEXITY

KW - RECOVERY

KW - DESIGN

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