Demogenetic structure of brown trout Salmo trutta Linnaeus, 1758 populations in mountain headwaters: implications for conservation management

0445167 - ÚŽFG 2016 RIV DE eng J - Článek v odborném periodiku
Závorka, L. - Horký, P. - Kohout, Jan - Kalous, L. - Slavík, O.
Demogenetic structure of brown trout Salmo trutta Linnaeus, 1758 populations in mountain headwaters: implications for conservation management.
Journal of Applied Ichthyology. Roč. 31, č. 3 (2015), s. 501-508. ISSN 0175-8659. E-ISSN 1439-0426
Institucionální podpora: RVO:67985904
Klíčová slova: genetic structure
Kód oboru RIV: EG - Zoologie
Impakt faktor: 0.783, rok: 2015

A demogenetic analysis based on 7years of observation (2005-2011) was conducted to examine the population structure of brown trout Salmo trutta in pristine dendritic headwaters. The value of genetic divergence (F-ST) among sampling units ranged from -0.03 to 0.16. Demographic synchrony was low or moderate, and the average correlation coefficient of population growth between sampling units ((r) over bar) ranged from 0.28 to 0.66. No isolation by distance was observed, but genetic divergence was negatively correlated with demographic synchrony among sampling units. Variance in the population growth rate (i.e. local extinction probability) increased with distance from the mainstream and from other sampling units. In contradiction with the usual model of stream-dwelling salmonids, the upstream sections of headwaters holds only ephemeral subpopulations, whereas the mainstream played a role in the source area of the metapopulation. These findings stress the importance of the mainstream in management conservation for brown trout in low productive mountain headwaters.
Trvalý link: http://hdl.handle.net/11104/0247573