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Ecological aspects of kin discriminating behavior with implications of functional value

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dc.contributor.advisor Blaustein, Andrew R.
dc.creator Hokit, D. Grant
dc.date.accessioned 2012-11-07T22:10:19Z
dc.date.available 2012-11-07T22:10:19Z
dc.date.copyright 1994-08-18
dc.date.issued 1994-08-18
dc.identifier.uri http://hdl.handle.net/1957/34950
dc.description Graduation date: 1995 en_US
dc.description.abstract To assess the context dependence of kin discriminating behavior, I examined kin-biased aggregation behavior in tadpoles of R. cascadae in different ecological conditions. I manipulated food distribution, predator presence, thermal heterogeneity, and relatedness in a multifactorial mesocosm experiment. All four factors interacted to influence tadpole dispersion. My results suggest that kinship is an important factor in aggregation behavior dependent upon ecological conditions. Kin-biased predator defense mechanisms have been proposed as a possible functional explanation for kin discrimination in anuran larvae. Tadpoles may better cooperate in predator vigilance while in kin groups or release kin specific alarm pheromones when attacked by a predator. I examined predator avoidance and alarm response behavior in tadpoles of the Cascades frog (Rana cascadae) and tested whether such behavior is influenced by kinship factors. I found no evidence of an alarm response behavior in R. cascadae. My results suggest that crushed tadpoles appear to initiate a feeding response rather than an alarm response as has been previously proposed. Kin-biased competitive interactions have been proposed as a possible functional explanation for kin discrimination in anuran larvae. Tadpoles may direct competitive interactions away from kin. I examined the role of kinship in growth and development of tadpoles of the Cascades frog (Rana cascadae) in both laboratory and field studies. In the laboratory, individuals reared in kin groups had a significantly smaller mass at metamorphosis than individuals reared in mixed groups. However, kinship effects in the field depended upon the treatment context. Depending upon tadpole density and access to flocculent substrate, tadpoles survived better (after adjusting for differences in mass) in kin groups than in mixed groups. My results demonstrate that kinship factors can affect growth and development in tadpoles, depending upon the ecological conditions. Furthermore, my results provide a functional explanation for the kin discriminating behavior observed in R. cascadae and suggest why such behavior may be context dependent. en_US
dc.language.iso en_US en_US
dc.subject.lcsh Tadpoles -- Behavior en_US
dc.subject.lcsh Kin recognition in animals en_US
dc.title Ecological aspects of kin discriminating behavior with implications of functional value en_US
dc.type Thesis/Dissertation en_US
dc.degree.name Doctor of Philosophy (Ph. D.) in Zoology en_US
dc.degree.level Doctoral en_US
dc.degree.discipline Science en_US
dc.degree.grantor Oregon State University en_US
dc.contributor.committeemember Menge, Bruce
dc.contributor.committeemember Dawson, Peter
dc.contributor.committeemember Beatty, Joseph
dc.contributor.committeemember Anthony, Robert
dc.contributor.committeemember Pearcy, William
dc.description.digitization File scanned at 300 ppi (Monochrome, 8-bit Grayscale) using ScandAll PRO 1.8.1 on a Fi-6770A in PDF format. CVista PdfCompressor 4.0 was used for pdf compression and textual OCR. en_US
dc.description.peerreview no en_us


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