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THE EVOLUTION OF HOST-PLANT USE BY T...

HAGEN, ROBERT HARVEY.

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THE EVOLUTION OF HOST-PLANT USE BY THE TIGER SWALLOWTAIL BUTTERFLY, PAPILIO GLAUCUS (LEPIDOPTERA, PAPILIONIDAE).

Record Type:	Electronic resources : Monograph/item
Title/Author:	THE EVOLUTION OF HOST-PLANT USE BY THE TIGER SWALLOWTAIL BUTTERFLY, PAPILIO GLAUCUS (LEPIDOPTERA, PAPILIONIDAE)./
Author:	HAGEN, ROBERT HARVEY.
Description:	312 p.
Notes:	Source: Dissertation Abstracts International, Volume: 47-08, Section: B, page: 3225.
Contained By:	Dissertation Abstracts International47-08B.
Subject:	Biology, Entomology. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=8628393

THE EVOLUTION OF HOST-PLANT USE BY THE TIGER SWALLOWTAIL BUTTERFLY, PAPILIO GLAUCUS (LEPIDOPTERA, PAPILIONIDAE).
HAGEN, ROBERT HARVEY.

THE EVOLUTION OF HOST-PLANT USE BY THE TIGER SWALLOWTAIL BUTTERFLY, PAPILIO GLAUCUS (LEPIDOPTERA, PAPILIONIDAE). - 312 p.

Source: Dissertation Abstracts International, Volume: 47-08, Section: B, page: 3225.

Thesis (Ph.D.)--Cornell University, 1986.

The diet breadths (host ranges) of phytophagous insects can expand or contract over evolutionary time. Expansion of the host range might be caused by divergence of host races within a species, or by evolution of new feeding abilities in individual insects. I examined these alternatives in the butterfly Papilio glaucus (Lepidoptera: Papilionidae), which represents a clear case of a polyphagous species that has evolved from oligophagous ancestors.Subjects--Topical Terms:

1018619
Biology, Entomology.

THE EVOLUTION OF HOST-PLANT USE BY THE TIGER SWALLOWTAIL BUTTERFLY, PAPILIO GLAUCUS (LEPIDOPTERA, PAPILIONIDAE).
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040 $a UnM $c UnM
100 1 $a HAGEN, ROBERT HARVEY. $3 1949554
245 1 4 $a THE EVOLUTION OF HOST-PLANT USE BY THE TIGER SWALLOWTAIL BUTTERFLY, PAPILIO GLAUCUS (LEPIDOPTERA, PAPILIONIDAE).
300 $a 312 p.
500 $a Source: Dissertation Abstracts International, Volume: 47-08, Section: B, page: 3225.
502 $a Thesis (Ph.D.)--Cornell University, 1986.
520 $a The diet breadths (host ranges) of phytophagous insects can expand or contract over evolutionary time. Expansion of the host range might be caused by divergence of host races within a species, or by evolution of new feeding abilities in individual insects. I examined these alternatives in the butterfly Papilio glaucus (Lepidoptera: Papilionidae), which represents a clear case of a polyphagous species that has evolved from oligophagous ancestors.
520 $a P. glaucus larvae from populations sampled along a latitudinal transect through eastern North America showed variation in ability to feed on some, but not all, host-plants tested. Larvae from northern populations survived on Populus and Betula species, but not on Liriodendron tulipifera. Southern larvae survived on Liriodendron, but died on Populus and Betula.
520 $a Analysis of genetic relationships among populations using protein electrophoresis supported pervious arguments for distinct northern and southern subspecies (canadensis and glaucus). Subspecies differed strongly in allele frequencies at 2 sex-linked enzyme loci. Differing feeding abilities are evolved traits of the subspecies, attributable to regional differences in availability of potential hosts. Host races do not account for polyphagy in P. glaucus, though geographic variation contributes to increased host range.
520 $a Polyphagy in P. glaucus results from behavioral and physiological traits common to both subspecies. P. glaucus larvae were more willing than specialized papilionids to accept non-hosts as food: larvae began feeding on nearly all species of woody plants tested, though they could develop successfully on few of them. P. glaucus feeds on mature foliage; young leaves of some hosts were toxic to larvae despite higher nutritional quality. Ability to feed on mature foliage may allow larvae to avoid high concentrations of plant toxins that would otherwise limit the host range. Larvae appear to tolerate low concentrations of many plant secondary compounds and do not depend strongly upon specific cues to initiate feeding.
520 $a Evolution of polyphagy in the P. glaucus lineage may have occurred by relaxation of the specificity of host-acceptance criteria and by increased tolerance of poor-quality mature foliage. The rarity of polyphagy among Papilionidae may be due to strong selection against these traits among specialized insects living in complex forest habitats.
590 $a School code: 0058.
650 4 $a Biology, Entomology. $3 1018619
690 $a 0353
710 2 0 $a Cornell University. $3 530586
773 0 $t Dissertation Abstracts International $g 47-08B.
790 $a 0058
791 $a Ph.D.
792 $a 1986
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=8628393