Introgression affects Salmo trutta juvenile life-history traits generations after stocking with non-native strains.

ABSTRACT: Introgression of non-native conspecifics changes the genetic composition of wild populations, potentially leading to loss of local adaptations and fitness declines. However, long-term data from wild populations are still relatively few. Here, we studied the effects of introgression in a Danish brown trout (Salmo trutta, L.) population, subjected to intensive stocking with domesticated hatchery fish of non-native origin. We used wild-caught genetically wild and admixed trout as well as fish from the partly domesticated hatchery strain used for stocking the river up until ~15 years prior to this study, to produce 22 families varying in hatchery/wild admixture. Following a replicated common-garden experiment conducted in fish tanks from first feeding through 23 weeks at 7, 12, and 16°C

SUBMITTER: Bekkevold D 

PROVIDER: S-EPMC11219512 | biostudies-literature | 2024 Jul

REPOSITORIES: biostudies-literature