Microsatellites reveal fine-scale genetic structure in stream-living brown trout

Autor:	Øyvind Øverli, Jens Carlsson, O. B. Stabell, Jan Nilsson, K. H. Olsén
Rok vydání:	1999
Předmět:	Genetic diversity biology Ecology Zoology Population genetics Aquatic Science biology.organism_classification Brown trout Genetic drift Genetic structure Genetic variability Salmo Ecology Evolution Behavior and Systematics Isolation by distance
Zdroj:	Journal of Fish Biology. 55:1290-1303
ISSN:	1095-8649 0022-1112
DOI:	10.1111/j.1095-8649.1999.tb02076.x
Popis:	Multilocus F ST estimates revealed a pronounced genetic structure at six microsatellite loci in brown trout Salmo trutta in Nordre Finnvikelv, with at least three breeding units that remained stable over time. Significant differences in allele frequencies were found between five sections within a 3-km range, even when no physical barriers prevented fish from migrating between sections. It is argued that geological structures may rise to patterns resembling isolation by distance. Seemingly, the most important factor causing genetic differentiation in Nordre Finnvikelv is genetic drift in small populations that are geologically subdivided by a tributary and by impassable waterfalls. Some correlation between previous behavioural observations and genetic structures were found.
Databáze:	OpenAIRE
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