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Metabolic Cost of Acute Physical Stress in Juvenile Steelhead
Author(s) -
Barton Bruce A.,
Schreck Carl B.
Publication year - 1987
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(1987)116<257:mcoaps>2.0.co;2
Subject(s) - respirometer , juvenile , salmo , zoology , fish <actinopterygii> , oxygen , fishery , biology , chemistry , ecology , organic chemistry
Juvenile steelhead Salmo gairdneri were subjected to three consecutive 2‐min disturbances, separated by 0.5‐h intervals, and then forced to swim at 0.5 body length/s for 1 h in a modified Blazka respirometer. Mean oxygen consumption (±SE) was 223 ± 19 mg˙kg −1 ˙h −1 in the stressed fish and 101 ± 9.7 in unstressed fish. There was no significant correlation between oxygen consumption and fish weight or water temperature within the ranges used (40–150 g and 8–11°C, respectively). Elevated plasma cortisol levels and oxygen consumption rates in stressed fish were positively correlated (r = 0.76). An acute physical stress may adversely affect fish by reducing, by about one‐quarter, the energy available for other activities within the scope for activity of the fish.