Post-colonization Reversal of Selection Pressure on Dispersal Behavior of the Brown Treesnake, Boiga irregularis, on Guam

Autor:	Michelle T. Christy, Claudine L. Tyrrell, Julie A. Savidge, Kathryn Dean-Bradley, Gordon H. Rodda
Rok vydání:	2008
Předmět:	education.field_of_study biology Ecology Population Introduced species biology.organism_classification Habitat Biological dispersal Activity areas Animal Science and Zoology Colonization education Ecology Evolution Behavior and Systematics Selection (genetic algorithm) Boiga irregularis
Zdroj:	South American Journal of Herpetology. 3:123-134
ISSN:	1937-2418 1808-9798
DOI:	10.2994/1808-9798(2008)3[123:prospo]2.0.co;2
Popis:	It is plausible that introduced species in the beginning of an invasion would be subjected to selection pressure to disperse rapidly so as to access unexploited habitats, but be subjected to selection pressure for more sedentary behavior once the available habitat was fully colonized. Using a mix of previously-published and new data from the introduced Brown Treesnake (Boiga irregularis) population on Guam we evaluated this scenario and found that: 1) Brown Treesnakes accessed a food bonanza when colonizing Guam, and then depleted it; 2) during the irruption, high-dispersing Brown Treesnakes most-likely benefitted by accessing undepleted or less-depleted food areas; and 3) after the irruption, high-dispersing Brown Treesnakes probably wasted effort through superfluous movement, and Brown Treesnake activity areas on Guam decreased in size in the 1990s, possibly in response to selection pressure for reducing superfluous movement. Nonetheless, 4) confined Brown Treesnakes had better fitness measures...
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::bc27d5a7b4a9e4d52f2f044240112f9f https://doi.org/10.2994/1808-9798(2008)3[123:prospo]2.0.co Zobrazit plný text záznamu