Self-organization of intertidal snails facilitates evolution of aggregation behavior

This source preferred by Rick Stafford

Authors: Stafford, R., Davies, M.S. and Williams, G.A.

Journal: Artificial Life

Volume: 14

Pages: 409-423

ISSN: 1064-5462

DOI: 10.1162/artl.2008.14.4.14401

This data was imported from PubMed:

Authors: Stafford, R., Davies, M.S. and Williams, G.A.

Journal: Artif Life

Volume: 14

Issue: 4

Pages: 409-423

ISSN: 1064-5462

DOI: 10.1162/artl.2008.14.4.14401

Many intertidal snails form aggregations during emersion to minimize desiccation stress. Here we investigate possible mechanisms for the evolution of such behavior. Two behavioral traits (following of mucus trails, and crevice occupation), which both provide selective advantages to individuals that possess the traits over individuals that do not, result in self-organization of aggregations in crevices in the rock surface. We suggest that the existence of self-organizing aggregations provides a mechanism by which aggregation behavior can evolve. The inclusion of an explicitly coded third behavior, aggregation, in a simulated population produces patterns statistically similar to those found on real rocky shores. Allowing these three behaviors to evolve using an evolutionary algorithm, however, results in aggregation behavior being selected against on shores with high crevice density. The inclusion of broadcast spawning dispersal mechanisms in the simulation, however, results in aggregation behavior evolving as predicted on shores with both high crevice density and low crevice density (evolving in crevices first, and then both in crevices and on flat rock), indicating the importance of environmental interactions in understanding evolutionary processes. We propose that self-organization can be an important factor in the evolution of group behaviors.

This data was imported from Scopus:

Authors: Stafford, R., Davies, M.S. and Williams, G.A.

Journal: Artificial Life

Volume: 14

Issue: 4

Pages: 409-423

eISSN: 1530-9185

ISSN: 1064-5462

DOI: 10.1162/artl.2008.14.4.14401

Many intertidal snails form aggregations during emersion to minimize desiccation stress. Here we investigate possible mechanisms for the evolution of such behavior. Two behavioral traits (following of mucus trails, and crevice occupation), which both provide selective advantages to individuals that possess the traits over individuals that do not, result in self-organization of aggregations in crevices in the rock surface. We suggest that the existence of self-organizing aggregations provides a mechanism by which aggregation behavior can evolve. The inclusion of an explicitly coded third behavior, aggregation, in a simulated population produces patterns statistically similar to those found on real rocky shores. Allowing these three behaviors to evolve using an evolutionary algorithm, however, results in aggregation behavior being selected against on shores with high crevice density. The inclusion of broadcast spawning dispersal mechanisms in the simulation, however, results in aggregation behavior evolving as predicted on shores with both high crevice density and low crevice density (evolving in crevices first, and then both in crevices and on flat rock), indicating the importance of environmental interactions in understanding evolutionary processes. We propose that self-organization can be an important factor in the evolution of group behaviors. © 2008 Massachusetts Institute of Technology.

This data was imported from Web of Science (Lite):

Authors: Stafford, R., Davies, M.S. and Williams, G.A.

Journal: ARTIFICIAL LIFE

Volume: 14

Issue: 4

Pages: 409-423

eISSN: 1530-9185

ISSN: 1064-5462

DOI: 10.1162/artl.2008.14.4.14401

This data was imported from Europe PubMed Central:

Authors: Stafford, R., Davies, M.S. and Williams, G.A.

Journal: Artificial life

Volume: 14

Issue: 4

Pages: 409-423

eISSN: 1530-9185

ISSN: 1064-5462

Many intertidal snails form aggregations during emersion to minimize desiccation stress. Here we investigate possible mechanisms for the evolution of such behavior. Two behavioral traits (following of mucus trails, and crevice occupation), which both provide selective advantages to individuals that possess the traits over individuals that do not, result in self-organization of aggregations in crevices in the rock surface. We suggest that the existence of self-organizing aggregations provides a mechanism by which aggregation behavior can evolve. The inclusion of an explicitly coded third behavior, aggregation, in a simulated population produces patterns statistically similar to those found on real rocky shores. Allowing these three behaviors to evolve using an evolutionary algorithm, however, results in aggregation behavior being selected against on shores with high crevice density. The inclusion of broadcast spawning dispersal mechanisms in the simulation, however, results in aggregation behavior evolving as predicted on shores with both high crevice density and low crevice density (evolving in crevices first, and then both in crevices and on flat rock), indicating the importance of environmental interactions in understanding evolutionary processes. We propose that self-organization can be an important factor in the evolution of group behaviors.

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