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A Noninvasive Method For In situ Determination of Mating Success in Female American Lobsters (Homarus americanus)

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Detecting larval export from marine reserves.

R A Pelc¹, R R Warner, S D Gaines

¹Department of Ecology, Evolution, and Marine Biology, University of California, Santa Barbara, CA 93106, USA. rpelc@mbayaq.org

Proceedings of the National Academy of Sciences of the United States of America

|February 26, 2010

Summary

This summary is machine-generated.

No-take marine reserves can benefit fished areas through larval export, but detecting this effect is challenging. Models show benefits often offset fishing displacement, yet small recruitment increases make field detection difficult.

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Area of Science:

Marine Ecology
Fisheries Management
Conservation Biology

Background:

Marine reserve theory posits that no-take zones enhance surrounding fisheries via larval export.
Empirical evidence supporting larval export from marine reserves remains limited.

Purpose of the Study:

To model the magnitude and spatial scale of larval export from marine reserves.
To assess the detectability of larval export benefits in field studies.

Main Methods:

Utilized a simple idealized coastline model.
Simulated larval export across various marine reserve sizes and larval dispersal scales.

Main Results:

Larval export benefits generally offset increased fishing mortality outside reserves.
Proportional recruitment increases outside reserves are typically small, especially with long-distance dispersal.
Detection is difficult without large production differentials, short dispersal, directional currents, or extensive sampling.

Conclusions:

Marine reserves can theoretically enhance adjacent fished areas through larval export.
Detecting these benefits in real-world studies is challenging due to small proportional increases and dispersal scales.
Effective detection requires optimized sampling strategies and consideration of dispersal patterns.