Consistency in the stress response of individuals of two strains of rainbow trout, Oncorhynchus mykiss
Pottinger, T.G.; Pickering, A.D.; Hurley, M.A.. 1992 Consistency in the stress response of individuals of two strains of rainbow trout, Oncorhynchus mykiss. Aquaculture, 103 (3-4). 275-289. https://doi.org/10.1016/0044-8486(92)90172-H
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Abstract/Summary
Post-stress plasma cortisol levels, following a standardized confinement stress, were monitored on a monthly basis for 5 months in 240 individually marked rainbow trout from each of two strains. At the end of this period individuals showing a consistent high or low response to stress were segregated. Post-stress plasma cortisol levels in selected high- and low-responding fish were similar for each strain (high 148.6 ± 3.2, 144.7 ± 2.4 ng/ml; low 80.3 ± 2.3, 72.9 ± 2.7 ng/ml). The difference in magnitude of response between the two selected groups was maintained for at least 28 months, post-stress plasma cortisol values in strain 1 at this point being, high responders 404.1 ± 28.2 ng/ml, low responders 172.8 ± 20.0 ng/ml. Despite this stability of response within the selected fish, analysis of the complete data set (480 fish) failed to demonstrate unequivocally whether a stable response level to stress is characteristic of all individuals. The implications of these results are discussed with reference to the potential benefits of producing strains of fish with a reduced sensitivity or responsiveness to common forms of aquacultural stress.
| Item Type: | Publication - Article |
|---|---|
| Digital Object Identifier (DOI): | https://doi.org/10.1016/0044-8486(92)90172-H |
| UKCEH and CEH Sections/Science Areas: | _ Pre-2000 sections |
| ISSN: | 0044-8486 |
| Additional Keywords: | Rainbow trout, stress, cortisol, selective breeding, coping strategy |
| NORA Subject Terms: | Zoology Biology and Microbiology |
| Date made live: | 19 Aug 2015 10:30 +0 (UTC) |
| URI: | https://nora.nerc.ac.uk/id/eprint/511149 |
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