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Science 16 May 2003:
Vol. 300. no. 5622, pp. 1135 - 1137
DOI: 10.1126/science.1083437
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Reports

Local Selection and Latitudinal Variation in a Marine Predator-Prey Interaction

Eric Sanford,1,2* Melissa S. Roth,1 Glenn C. Johns,1 John P. Wares,3 George N. Somero1

Although pairs of species often interact over broad geographic ranges, few studies have explored how interactions vary across these large spatial scales. Surveys along 1500 kilometers of the Pacific coast of North America documented marked variation in the frequency of predation by the snail Nucella canaliculata on the intertidal mussel Mytilus californianus. Laboratory rearing experiments suggest that regional differences in drilling behavior have a genetic basis, and mitochondrial sequence variation confirms that gene flow is low among these snail populations. Marine communities separated by hundreds of kilometers may have intrinsically different dynamics, with interactions shaped by restricted gene flow and spatially varying selection.

1 Stanford University, Hopkins Marine Station, Pacific Grove, CA 93950, USA.
2 Brown University, Department of Ecology and Evolutionary Biology, Providence, RI 02912, USA.
3 University of California–Davis, Center for Population Biology, Davis, CA 95616, USA.

* To whom correspondence should be addressed. E-mail: eric_sanford{at}brown.edu

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THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
DRILLING PREDATION INTENSITY AND FEEDING PREFERENCES BY NUCELLA (MURICIDAE) ON LIMPETS INFERRED FROM A DEAD-SHELL ASSEMBLAGE.
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Patterns of Hsp gene expression in ectothermic marine organisms on small to large biogeographic scales.
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