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Predator and prey space use: Interactive games between tadpoles and their predators.

John Isaac. Hammond University of California, Davis. 2008

Dissertation Abstracts International 69-06B.

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題名:
Predator and prey space use: Interactive games between tadpoles and their predators.
著者: John Isaac. Hammond
University of California, Davis.
主題: Biology, Ecology
所屬期刊: Dissertation Abstracts International 69-06B.
描述: Predator-prey spatial distributions can have important population and community level consequences. However, little is know either theoretically or empirically about the behavioral mechanisms that underlie the spatial patterns that emerge when predators and prey freely interact. This dissertation examined the spatial patterns between freely interacting groups of tadpole prey and their predators. Spatial patterns were investigated in three different ways. Average space use of predators and prey in isolation and together were compared to predictions from models of ideal free distributions for three trophic levels. Joint space use when predators and prey were together was compared to the expected spatial pattern based on the predators and prey spatial distributions when in isolation. Using a model selection approach, behavioral movement rules generating the observed spatial patterns were investigated. Chapter one discusses how prey size affects predator and prey spatial patterns for odonate predators in arenas consisting of two patches that vary in the amount of prey resources. Chapter two investigates how salamander predators and two size classes of prey balance two environmental factors; patches that differ in the prey's resource level and habitat structure. Chapter three examines how scale affects spatial patterns with odonate predators in arenas consisting of four patches that vary in the amount of prey resource present at two different scales. Overall, results give mixed support for the theoretical predictions for spatial patterns. The general implication from this dissertation is that a more comprehensive predictive framework is achieved by investigating spatial patterns as more than just average space use. Incorporating joint space use and identifying which factors influence movements between patches are critical components in explaining the resulting spatial patterns. The second implication is constraints shape the spatial patterns in predictive ways. Differ
出版者: Thesis (Ph.D.)--University of California, Davis, 2008.
建立日期: 2008
格式: 132 p..
語言: 英文
識別號: ISBN9780549671572
資源來源: NUTN ALEPH

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Predator and prey space use: Interactive games between tadpoles and their predators.

John Isaac. Hammond University of California, Davis. 2008

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