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Physiological Response to Hooking Stress in Hatchery and Wild Rainbow Trout (Salmo gairdneri)
Author(s) -
Wydoski R. S.,
Wedemeyer G. A.,
Nelson N. C.
Publication year - 1976
Publication title -
transactions of the american fisheries society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.696
H-Index - 86
eISSN - 1548-8659
pISSN - 0002-8487
DOI - 10.1577/1548-8659(1976)105<601:prthsi>2.0.co;2
Subject(s) - rainbow trout , hatchery , salmo , fishery , trout , fight or flight response , zoology , biology , osmoregulation , fish <actinopterygii> , ecology , salinity , biochemistry , gene
This study evaluated the physiological response of rainbow trout to hooking stress after being played under standardized conditions (0–5 min) and estimated the time needed for recovery (to 72 h). Plasma osmolality and chloride measurements were used to evaluate osmoregulatory disturbances and gill ion‐exchange function, and plasma glucose was used as an index of the generalized nonspecific physiological stress response. Hooking stress caused more severe blood chemistry differences in hatchery fish than in wild trout. Also, hooking stress imposed a greater stress on larger than on smaller hatchery rainbow trout. Higher water temperatures aggravated the delayed hyperglycemia and hyperchloremia in both hatchery and wild trout but only about 3 days were needed for recovery at 4, 10, or 20 C.