Se. Fevolden et al., GENETIC AND PHENOTYPIC PARAMETERS FOR CORTISOL AND GLUCOSE STRESS-RESPONSE IN ATLANTIC SALMON AND RAINBOW-TROUT, Aquaculture, 118(3-4), 1993, pp. 205-216
Plasma cortisol and glucose levels were monitored in large numbers of
hatchery-reared full- and half-sib families of Atlantic salmon (553 fu
ll-sib groups) and rainbow trout (281 full-sib groups) following a sta
ndardized confinement stress. The approximately normally distributed f
requency of cortisol concentrations exhibited mean values in Atlantic
salmon that were similar over the four year-classes examined and more
than twice as high as in rainbow trout in two of three year-classes. T
he post-stress glucose levels were of the same order of magnitude in t
he two species and stable over year-classes. Heritability estimates (h
2) for cortisol and glucose were low in Atlantic salmon (mean across y
ear-classes 0.05 and 0.03); in rainbow trout cortisol levels exhibited
heritability estimates of low to medium magnitude (mean 0.27), wherea
s h2 of glucose was low (mean 0.07).