Vitenskapelig artikkel

Prespawning stress in farmed Atlantic salmon Salmo salar: maternal cortisol exposure and hyperthermia during embryonic development affect offspring survival, growth and incidence of malformations

Eriksen, Marit Skog; Bakken, Morten; Espmark, Åsa Maria O.; Braastad, Bjarne Olai; Salte, Ragnar

Publikasjonsdetaljer

Tidsskrift: Journal of Fish Biology, vol. 69, p. 114–129–16, 2006

Utgiver: Academic Press

Internasjonale standardnumre:
Trykt: 0022-1112
Elektronisk: 1095-8649

Open Access: none

Lenker:
DOI

In the current study, mature female Atlantic salmon Salmo salar were given intraperitoneal cortisol implants with the purpose of elucidating potentially detrimental effects on offspring survival, growth, morphological development and also the ability of prenatally stressed offspring to cope with an environmental stressor, typified by a period of mild hyperthermia. Augmented levels of maternal cortisol inflicted a range of progeny somatic parameters, as reflected in increased mortality, reduced fork length and mass, diminished yolk-sac volume, decelerated yolk-sac utilization and, to some extent, enhanced prevalence of morphological malformations. The most pronounced consequences on offspring performance were demonstrated in specimens exposed to both enhanced prenatal cortisol and a subsequent episode of hyperthermia. This accentuates the importance of knowledge on how the maternal endocrinological state during gametogenesis may impinge on offspring characters in fanned Atlantic salmon, and further substantiates the necessity of incorporating maternal effects when evaluating rearing conditions and animal welfare in commercial aquaculture. (c) 2006 The Fisheries Society of the British Isles.