Competition and the evolution of aggressive behavior in two species of terrestrial salamanders.

Research output: Contribution to journalArticle

61 Citations (Scopus)

Abstract

Plethodon jordani and P. glutinosus are closely related, ecologically similar species that are sympatric at intermediate elevations in the S Appalachian Mountains. Interspecific competition is more intense in the NE Great Smoky Mountains, where the species are narrowly sympatric, than in the nearby Balsam Mountains, where sympatry is broader. In laboratory encounters, P. glutinosus from the Great Smoky Mountains were more aggressive to heterospecific and conspecific intruders than were P. glutinosus from the Balsam Mountains. For P. jordani, however, the variation in interspecific and intraspecific aggressive behavior among individuals within populations was as great as the variation between populations. Alpha-selection (ie improved competitive ability by the acquisition of interspecific interference mechanisms) has occurred in populations of P. glutinosus under conditions of intense interspecific competition. The evolution of aggressive behavior also appears to have been influenced by the intensity of intraspecific competition. -from Author

Original languageEnglish (US)
Pages (from-to)1282-1294
Number of pages13
JournalEvolution
Volume39
Issue number6
StatePublished - 1985
Externally publishedYes

Fingerprint

Sympatry
Urodela
Balsams
salamanders and newts
Great Smoky Mountain region
aggression
interspecific competition
mountain
mountains
Plethodon
Population
Aptitude
Appalachian region
intraspecific competition
interspecific variation
sympatry
competitive ability
salamander

ASJC Scopus subject areas

  • Agricultural and Biological Sciences(all)
  • Agricultural and Biological Sciences (miscellaneous)
  • Ecology, Evolution, Behavior and Systematics
  • Genetics
  • Ecology
  • Genetics(clinical)

Cite this

Competition and the evolution of aggressive behavior in two species of terrestrial salamanders. / Nishikawa, Kiisa C.

In: Evolution, Vol. 39, No. 6, 1985, p. 1282-1294.

Research output: Contribution to journalArticle

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