Stress and adrenocorticosteroid dynamics in the goldfish, Carassius auratus.

摘要: In goldfish serum, cortisol was found to constitute 77.6% of the adrenocorticosteroids measured by a competitive protein-binding radioassay. Adult maintained on photoperiod 14 h light: 10 h dark in November exhibited no significant variation serum corticosteroid concentration throughout 24-h cycle. Goldfish an 8L:16D June two peaks adrenocorticosteroid concentration. Four hours before onset light period and 4 h after period, corticosteroids were significantly higher than those observed at midpoint period. After sham injection, swimming shallow water, or thermal shock, but not handling disturbance, circulating levels undisturbed fish. Betamethasone injected 24 h stress completely blocked stress-induced increase vehicle-injected uninjected goldfish, demonstrating t...