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Chemical ecology and evolution of ho...

Sime, Karen Rachel.

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Chemical ecology and evolution of host range in the parasitoid genus Trogus (Hymenoptera: Ichneumonidae).

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Chemical ecology and evolution of host range in the parasitoid genus Trogus (Hymenoptera: Ichneumonidae)./
作者:	Sime, Karen Rachel.
面頁冊數:	352 p.
附註:	Source: Dissertation Abstracts International, Volume: 61-11, Section: B, page: 5684.
Contained By:	Dissertation Abstracts International61-11B.
標題:	Biology, Entomology. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=9995107
ISBN:	049302171X

Chemical ecology and evolution of host range in the parasitoid genus Trogus (Hymenoptera: Ichneumonidae).
Sime, Karen Rachel.

Chemical ecology and evolution of host range in the parasitoid genus Trogus (Hymenoptera: Ichneumonidae). - 352 p.

Source: Dissertation Abstracts International, Volume: 61-11, Section: B, page: 5684.

Thesis (Ph.D.)--Cornell University, 2001.

Parasitic wasps in the genus Trogus (Ichneumonidae) attack the larvae of swallowtail butterflies (Papilionidae) in the tribes Papilionini and Graphiini, but not those of species in the related tribe Troidini. The goal of this project was to find explanations for this restriction in host use, focusing on the roles of chemistry in determining host range.

ISBN: 049302171XSubjects--Topical Terms:

1018619
Biology, Entomology.

Chemical ecology and evolution of host range in the parasitoid genus Trogus (Hymenoptera: Ichneumonidae).
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100 1 $a Sime, Karen Rachel. $3 1949584
245 1 0 $a Chemical ecology and evolution of host range in the parasitoid genus Trogus (Hymenoptera: Ichneumonidae).
300 $a 352 p.
500 $a Source: Dissertation Abstracts International, Volume: 61-11, Section: B, page: 5684.
500 $a Adviser: Paul Feeny.
502 $a Thesis (Ph.D.)--Cornell University, 2001.
520 $a Parasitic wasps in the genus Trogus (Ichneumonidae) attack the larvae of swallowtail butterflies (Papilionidae) in the tribes Papilionini and Graphiini, but not those of species in the related tribe Troidini. The goal of this project was to find explanations for this restriction in host use, focusing on the roles of chemistry in determining host range.
520 $a A cladistic analysis of Trogus and related genera, together with a review of host records, determined the pattern of host shifts. Trogus is nested among genera that attack butterflies, mainly species of Papilio. The use of butterflies is derived from an association with the moth family Sphingidae.
520 $a The host-finding behavior of Trogus pennator (Fabricius) was studied in detail. In the field, the wasps can identify the food plants of hosts. They detect host damage before they approach the plants, though the plants are attractive even in the absence of hosts. After landing the wasps spend more time searching damaged than undamaged plants. It was shown experimentally that the wasps' responses to the odor of plants not damaged by hosts are learned. Both feeding damage and host frass produce odors that are, in contrast, innately attractive, and that are specific to the larvae of Papilionidae. These results support the hypothesis that fixed responses to host-derived chemical cues lead to conserved associations with host taxa.
520 $a Battus philenor (L.), a troidine, co-occurs with several hosts of T. pennator but is not parasitized. The frass of B. philenor larvae is as attractive to T. pennator as is the frass of hosts. It was established that B. philenor sequesters aristolochic acids from its food plants; the compounds occur in all stages and tissues. The larvae were rejected by T. pennator females on contact, and aristolochic acids were found to contribute to this deterrent effect. The wasps appeared to be unable to develop in B. philenor larvae. These results indicate that both behavioral and physiological barriers, the former attributable at least in part to sequestered compounds and the latter of unknown mechanism, prevent T. pennator from parasitizing B. philenor. They support the hypothesis that sequestered allelochemicals obstruct colonization by parasitoids.
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773 0 $t Dissertation Abstracts International $g 61-11B.
790 1 0 $a Feeny, Paul, $e advisor
790 $a 0058
791 $a Ph.D.
792 $a 2001
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