Genetic and Environmental Influences on Life History Traits in Lake Trout

Autor:	Brian J. Shuter, William N. Sloan, Peter E. Ihssen, Jenni L. McDermid
Rok vydání:	2007
Předmět:	Trout biology Ecotype Ecology parasitic diseases Environment controlled Aquatic Science Life history biology.organism_classification Ecology Evolution Behavior and Systematics Hybrid Salvelinus Life history theory
Zdroj:	Transactions of the American Fisheries Society. 136:1018-1029
ISSN:	1548-8659 0002-8487
Popis:	Lake trout Salvelinus namaycush exhibit substantial life history variation associated with variation in climatic and biotic variables. To assess the environmental and genetic influences on lake trout life history traits, eggs were collected from two lakes in Algonquin Park, Ontario, Lake Opeongo and Louisa Lake, with contrasting ecotypes and forage bases. Eggs from both populations and interpopulation hybrids (Lake Opeongo females × Louisa Lake males) were raised to maturity in a common controlled environment. There was evidence of a genetic basis to life history variation between ecotypes. Hatchery-reared lake trout from Louisa Lake were found to have a faster prematuration growth rate and earlier age and smaller size at maturation than Lake Opeongo lake trout, whereas Lake Opeongo lake trout had greater postmaturation growth rates. Most of the life history traits of hybrids were intermediate between those of the parent populations. These differences were also consistent with reported difference...
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::a84c8079b4a17fac2cdffe5196cdb528 https://doi.org/10.1577/t06-189.1 Zobrazit plný text záznamu Plný text