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The evolutionary and ecological sign...

Fordyce, James Andrew.

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The evolutionary and ecological significance of aggregative feeding of the California pipevine swallowtail, Battus philenor hirsuta (Lepidoptera: Papilionidae).

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	The evolutionary and ecological significance of aggregative feeding of the California pipevine swallowtail, Battus philenor hirsuta (Lepidoptera: Papilionidae)./
作者:	Fordyce, James Andrew.
面頁冊數:	184 p.
附註:	Source: Dissertation Abstracts International, Volume: 64-07, Section: B, page: 3051.
Contained By:	Dissertation Abstracts International64-07B.
標題:	Biology, Ecology. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3097966

The evolutionary and ecological significance of aggregative feeding of the California pipevine swallowtail, Battus philenor hirsuta (Lepidoptera: Papilionidae).
Fordyce, James Andrew.

The evolutionary and ecological significance of aggregative feeding of the California pipevine swallowtail, Battus philenor hirsuta (Lepidoptera: Papilionidae). - 184 p.

Source: Dissertation Abstracts International, Volume: 64-07, Section: B, page: 3051.

Thesis (Ph.D.)--University of California, Davis, 2003.

Egg clustering and aggregative feeding of herbivorous insect larvae is an important life history character because it represents a proportion of a female's potential fecundity that she invests in a single oviposition event. Numerous hypotheses have been proposed to explain the evolution of this trait; however, they have largely ignored the potential role of herbivore-induced responses in plants. In this dissertation, I investigate the evolutionary and ecological significance of aggregative feeding of the pipevine swallowtail, where there exists the unique situation of interpopulation variation for this trait. Unlike other populations, the California population has large clutches and larvae feed in aggregation. Evidence based upon mitochondrial DNA variation and inferences based upon the lack of Batesian mimics in California indicate that the California population is of recent origin, indicating that this trait might respond quickly to selection. Large larval aggregations grow at an increased rate in California, thereby decreasing the exposure of larvae to biotic and abiotic threats. Furthermore, large groups of larvae can overcome the structural trichome defenses of the California host plant, which may provide refuge from some crawling natural enemies and permit larvae to feed on superior food resources on young plant tissues where trichome density is highest. The increased growth rate associated with larger feeding aggregations is a consequence of a dynamic dose-dependent response of the plant. In other words, increased larval growth rate is a plant-mediated benefit and not a consequence of direct interaction among members of a feeding group. This effect of increased group size was not present on other plant species used by non-aggregating populations of pipevine swallowtail larvae. Aggregative feeding of the California population represents a manipulative strategy of butterfly larvae to enhance plant quality, or compromise induced plant defenses.Subjects--Topical Terms:

1017726
Biology, Ecology.

The evolutionary and ecological significance of aggregative feeding of the California pipevine swallowtail, Battus philenor hirsuta (Lepidoptera: Papilionidae).
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