Abstract
Endocrine, metabolic and osmoregulatory changes in Pacific halibut upon capture and at intervals following a 30-min air exposure were measured. Concentrations of cortisol, sodium, and chloride in plasma and serum peaked two hours after the stressor. Thirty minutes after a 30-min air exposure concentrations of glucose in plasma had increased significantly from levels obtained immediately after the stressor and remained elevated for up to 4 h. Plasma lactate was also elevated 30min after the stress treatment and lactate concentrations increased significantly at each subsequent sampling interval, 2 and 4 h. There was a significant linear increase in plasma lactate for fish sampled from 1.5 to 6.5 h after capture. Incidence of delayed mortality was low; of 22 experimentally stressed animals only one died over a 10-day monitoring period. These data illustrate the difficulties in using single time-point plasma indices of stress to assess condition of animals after capture since the time-course of physiological changes associated with the stress response vary with parameter measured and may take hours to be fully expressed.
Original language | English (US) |
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Pages (from-to) | 382-387 |
Number of pages | 6 |
Journal | Journal of Applied Ichthyology |
Volume | 22 |
Issue number | 5 |
DOIs | |
State | Published - Oct 2006 |
Externally published | Yes |
ASJC Scopus subject areas
- Aquatic Science