By Susan A. Foster, John A. Endler
Reviews of animal habit frequently think that each one contributors of a species convey an analogous habit. Geographic edition in habit exhibits that, to the contrary, there's substantional edition inside of species throughout a variety of taxa. together with paintings from pioneers within the box, this quantity presents a balanced review of study on behavioral features that fluctuate geographically. The authors discover the mechanisms in which behavioral modifications evolve and consider comparable methodological matters. Taken jointly, the paintings gathered right here demonstrates that genetically dependent geographic edition will be way more common than formerly suspected. The ebook additionally exhibits how edition in habit can light up either behavioral evolution and basic evolutionary styles. targeted between books on habit in its emphasis on geographic edition, this quantity is a invaluable new source for college kids and researchers in animal habit and evolutionary biology.
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Additional info for Geographic Variation in Behavior: Perspectives on Evolutionary Mechanisms
Spiders protected from predation by birds also exhibited more variance in their "fear" scores. Finally, the spiders in the protected exclosures significantly more often won territorial contests when matched for weight against spiders from exposed exclosures (fig. 1-12). These results suggest differential mortality of the more aggressive aridland phenotypes in the exposed exclosures. Alternatively, the differences in behavior may reflect experiential effects: spiders exposed to bird predalion attempts may have developed behavior patterns appropriate to the presence of predators as a consequence of experience.
Spiders mature during the hottest and driest time of the year (April-July). The offspring emerge coincident with the summer rains and associated high levels of insect prey. Agelenopsis builds a sheet-web with an attached funnel that extends into a crack or crevice in the ground. This funnel protects the spider from unfavorable temperature extremes (Riechert and Tracy 1975) and from predation by visual predators (Riechert and Hedrick 1990). Because the web-sheet is not sticky, A. aperta must be at the funnel entrance of its web-sheet to locate prey contacting the web.
Pyke, G. H. 1984. Optimal foraging theory: A critical review. Annual Review of Ecology and Systematics 15:523-575. Reeve, H. , and P. W. Sherman. 1993. Adaptation and the goals of evolutionary research. Quarterly Review of Biology 68:1-32. Riechert, S. E. 1974. The pattern of local web distribution in a desert spider: Mechanisms and seasonal variation. Journal of Animal Ecology 43:733—746. Riechert, S. E. 1978a. Energy-based territoriality in populations of the desert spider, Agelenopsis aperta (Gertsch).