Introgression from farmed escapees affects the full life cycle of wild Atlantic salmon.

Autor: Bolstad GH; Norwegian Institute for Nature Research (NINA), NO-7485 Trondheim, Norway., Karlsson S; Norwegian Institute for Nature Research (NINA), NO-7485 Trondheim, Norway., Hagen IJ; Norwegian Institute for Nature Research (NINA), NO-7485 Trondheim, Norway., Fiske P; Norwegian Institute for Nature Research (NINA), NO-7485 Trondheim, Norway., Urdal K; Rådgivende Biologer, NO-5059 Bergen, Norway., Sægrov H; Rådgivende Biologer, NO-5059 Bergen, Norway., Florø-Larsen B; Norwegian Veterinary Institute, NO-7485 Trondheim, Norway., Sollien VP; Norwegian Veterinary Institute, NO-7485 Trondheim, Norway., Østborg G; Norwegian Institute for Nature Research (NINA), NO-7485 Trondheim, Norway., Diserud OH; Norwegian Institute for Nature Research (NINA), NO-7485 Trondheim, Norway., Jensen AJ; Norwegian Institute for Nature Research (NINA), NO-7485 Trondheim, Norway., Hindar K; Norwegian Institute for Nature Research (NINA), NO-7485 Trondheim, Norway.
Jazyk: angličtina
Zdroj: Science advances [Sci Adv] 2021 Dec 24; Vol. 7 (52), pp. eabj3397. Date of Electronic Publication: 2021 Dec 22.
DOI: 10.1126/sciadv.abj3397
Abstrakt: After a half a century of salmon farming, we have yet to understand how the influx of genes from farmed escapees affects the full life history of Atlantic salmon ( Salmo salar L.) in the wild. Using scale samples of over 6900 wild adult salmon from 105 rivers, we document that increased farmed genetic ancestry is associated with increased growth throughout life and a younger age at both seaward migration and sexual maturity. There was large among-population variation in the effects of introgression. Most saliently, the increased growth at sea following introgression declined with the population’s average growth potential. Variation at two major-effect loci associated with age at maturity was little affected by farmed genetic ancestry and could not explain the observed phenotypic effects of introgression. Our study provides knowledge crucial for predicting the ecological and evolutionary consequences of increased aquaculture production worldwide.
Databáze: MEDLINE
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