Assessing Cumulative Thermal Stress in Fish During Chronic Exposure to High Temperature
As environmental laws become increasingly protective, and with possible future changes in global climate, thermal effects on aquatic resources are likely to receive increasing attention. Lethal temperatures for a variety of species have been determined for situations where temperatures rise rapidly resulting in lethal effects. However, less is known about the effects of chronic exposure to high (but not immediately lethal) temperatures and even less about stress accumulation during periods of fluctuating temperatures. In this paper we present a modeling framework for assessing cumulative thermal stress in fish. The model assumes that stress accumulation occurs above a threshold temperature at a rate depending on the degree to which the threshold is exceeded. The model also includes stress recovery (or alleviation) when temperatures drop below the threshold temperature as in systems with large daily variation. In addition to non-specific physiological stress, the model also simulates thermal effects on growth.
- Publication Date:
- OSTI Identifier:
- Report Number(s):
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- Resource Relation:
- Conference: Conference title not supplied, Conference location not supplied, Conference dates not supplied; Other Information: PBD: 14 Nov 1999
- Research Org:
- Oak Ridge National Lab., TN (US)
- Sponsoring Org:
- USDOE Office of Science (US)
- Country of Publication:
- United States
- 54 ENVIRONMENTAL SCIENCES; CHRONIC EXPOSURE; DAILY VARIATIONS; TEMPERATURE DEPENDENCE; FISHES
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