Stress-linked morphological change associated with rearing techniques of hatchery-reliant endemic landlocked Atlantic salmon (Salmo salar m. sebago).

ABSTRACT: Domestication effects caused by hatchery rearing impact various traits in fishes. Lake Saimaa landlocked salmon (Salmo salar m. sebago) have been dependent on hatchery propagation for over 50 years. The population is therefore at risk of hatchery-induced phenotypes, which can be suboptimal in the wild, thus impacting the long-term viability of the already critically endangered population. To assess the impact of rearing techniques, one-summer-old landlocked salmon morphology and asymmetry (an indicator of stress) was compared between four different hatchery rearing backgrounds, with all fish originating from the same family groups. The first group was maintained under standard hatchery conditions, the second under enriched rearing conditions (varying water level, direction and velocity), t

SUBMITTER: Hatanpaa A 

PROVIDER: S-EPMC12710846 | biostudies-literature | 2025 Nov

REPOSITORIES: biostudies-literature