Prey consumption, survivorship and oviposition by adults of the bark beetle predator Thanasimus dubius Fabricius (Coleoptera:Cleridae) Public Deposited

http://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/n009w560v

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  • Laboratory studies were conducted to evaluate the effects of prey availability on prey consumption, survivorship and oviposition of the southern pine beetle predator, Thanasimus dubius Fabricius. Although prey consumption rates were significantly affected by the sex, size and ovipositional status of the predator, it was found through correlation analyses that predator longevity was largely determined by the.availability of prey. Predator age was not found to significantly affect prey consumption rates. Oviposition increased directly with prey consumption to an asymptote determined by the feeding and/or ovipositional capacity of the predator. Measurements of field populations of predator and prey under epidemic conditions suggested that predator populations are not large enough to prevent infestation and killing of susceptible trees.
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