| Abstract: | This paper is a review of the effects of stress on reproduction in fishes. I hope to further the development of the concepts of allostasis and hormesis as relevant to understanding reproduction in general and in fish in particular. The main contentions I derive in this review are the following: Stressors affect fish reproduction in a variety of ways depending on the nature and severity of the stressor. The effects are transduced through a hormonal cascade initiated by perception of the stressor and involving the hypothalamus-pituitary-interrenal axis, the catecholamines, and also cytokines. Mounting a stress response and resisting a stressor is an energetically costly process, including costs associated with allostasis, attempting to reset homeostatic norms. Responses in emergency situations (e.g., being chased by a predator or a net) can be different from those where fish can cope (e.g., being in a more crowded environment) with a stressor, but both situations involve energy re-budgeting. Emergency responses happen in concert with the onset of energy limitations (e.g., the fish may not eat), while coping with allostatic overload can happen in a more energy-rich environment (e.g., the fish can continue to eat). Low levels of stress may have a positive effect on reproductive processes while greater stress has negative effects on fish reproduction. The concept of hormesis is a useful way to think about the effect of stressors on fish reproduction since responses can be nonmonotonal, often biphasic. |
| Genre: | Article |
| ProdID: | 70035361 |
| Citation Author: | Schreck, C. B. |
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| Citation End Page: | 556 |
| Citation Issue: | 3 |
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| Citation Language: | English |
| Citation Larger Work Title: | General and Comparative Endocrinology |
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| Citation Number Of Pages: | 8 |
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| Citation Search Results Text: | Stress and fish reproduction: The roles of allostasis and hormesis; 2010; Article; Journal; General and Comparative Endocrinology; Schreck, C. B. |
| Citation Start Page: | 549 |
| Citation Volume: | 165 |
| Citation Year: | 2010 |
| Type: | citation/reference |
| Text: | Stress and fish reproduction: The roles of allostasis and hormesis; 2010; Article; Journal; General and Comparative Endocrinology; Schreck, C. B. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| URL (DIGITAL OBJECT IDENTIFIER): | http://dx.doi.org/10.1016/j.ygcen.2009.07.004 |
| Date Other: | Fri, 1 Jan 2010 00:00 -0600 |
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