Stress, neuro-endocrine cascade and fish broodstock quality
A review of the effect of stress on broodfish quality was done. Ideally, fish should be maintained under controlled conditions which, as far as possible, match or improve upon those to which the fish would have been exposed in the wild or controlled culture medium. In practice, however, the management of the rearing conditions-water quality, feeding regime and diet, stocking density, exposure to pathogens, genetic engineering and handling parameters may all create stress. When such stress is applied to a broodfish, it elicits a series of neuroendocrine responses, which if prolonged, can result in cortisol levels rising significantly above the baseline. Consequently, the health of the brood fish and the viability of the progeny are affected. Farmers and breeders are therefore advised to pay special attention to the nutrition and proper handling their broodstock.
| Main Authors: | , , , |
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| Format: | conference_item biblioteca |
| Language: | English |
| Published: |
FISON
2010
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| Subjects: | Aquaculture, Nigeria, freshwater environment, Biological stress, Neurophysiology, Physiology, Fish culture, Reproduction, Fish physiology, |
| Online Access: | http://hdl.handle.net/1834/38154 |
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| Summary: | A review of the effect of stress on broodfish quality was done. Ideally, fish should be maintained under controlled conditions which, as far as possible, match or improve upon those to which the fish would have been exposed in the wild or controlled culture medium. In practice, however, the management of the rearing conditions-water quality, feeding regime and diet, stocking density, exposure to pathogens, genetic engineering and handling parameters may all create stress. When such stress is applied to a broodfish, it elicits a series of neuroendocrine responses, which if prolonged, can result in cortisol levels rising significantly above the baseline. Consequently, the health of the brood fish and the viability of the progeny are affected. Farmers and breeders are therefore advised to pay special attention to the nutrition and proper handling their broodstock. |
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