EFFECT OF AC ELECTROSHOCK ON BLOOD FEATURES IN JUVENILE RAINBOW-TROUT

Brief AC electroshock caused significant elevations in plasma cortisol , glucose, osmolality, and chloride levels in rainbow trout within 15 min, but plasma protein was reduced at 3 h. Circulating granulocytes h ad declined by 15 min, but other haematological features remained unch anged. Thus, AC electrofishing would not be suitable for monitoring ph ysiological conditions in trout if short delays are encountered before blood is sampled. (C) 1996 The Fisheries Society of the British Isles