Quantitative comparison of the stress response of striped bass (Morone saxatilis) and hybrid striped bass (Morone saxatilis x Morone chrysops and Morone saxatilis x Morone americana).
Striped bass (Morone saxatilis) exposed to a standardized confinement stress had markedly different clinical and endocrinologic responses, compared with hybrid striped bass exposed to the same stress. Plasma cortisol concentration increased at a faster rate and appeared to reach a higher value in striped bass than in hybrid bass. Mean plasma cortisol concentration was 742 +/- 43 ng/ml in striped bass, compared with 490 +/- 37 and 531 +/- 40 ng/ml in striped bass x white perch (M americana) and striped bass x white bass (M chrysops) hybrids, respectively, after a 45-minute net confinement. Plasma cortisol concentration also remained significantly (P = 0.003) higher in striped bass for at least 48 hours after the net confinement. These hormonal differences were associated with a markedly lower survival and resistance to infection in striped bass, compared with the hybrids.
Noga
E J
EJ
Department of Companion Animal and Special Species Medicine, College of Veterinary Medicine, North Carolina State University, Raleigh 27695.
Kerby
J H
JH
King
W
W
Aucoin
D P
DP
Giesbrecht
F
F
D000704:Analysis of Variance; D000818:Animals; D001492:Bass / Q000502:physiology*; D003429:Cross Reactions; D003433:Crosses, Genetic; D005260:Female; D005455:Fluorescent Antibody Technique; D005938:Glucocorticoids / Q000097:blood*; D006854:Hydrocortisone / Q000097:blood*; D008297:Male; D012149:Restraint, Physical; D013045:Species Specificity; D013315:Stress, Psychological / Q000097:blood*; D013997:Time Factors
D005938:Glucocorticoids; D006854:Hydrocortisone