Assessing Cumulative Thermal Stress in Fish During Chronic Exposure to High Temperature

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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 ... continued below

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Bevelhimer, M.S. & Bennett, W.R. November 14, 1999.

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This article is part of the collection entitled: Office of Scientific & Technical Information Technical Reports and was provided by UNT Libraries Government Documents Department to Digital Library, a digital repository hosted by the UNT Libraries. It has been viewed 59 times . More information about this article can be viewed below.

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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.

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OSTI as DE00014623

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  • Report No.: ORNL/CP-104950
  • Office of Scientific & Technical Information Report Number: 14623
  • Archival Resource Key: ark:/67531/metadc619116

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  • November 14, 1999

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  • June 16, 2015, 7:43 a.m.

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  • Jan. 21, 2016, 3:30 p.m.

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Bevelhimer, M.S. & Bennett, W.R. Assessing Cumulative Thermal Stress in Fish During Chronic Exposure to High Temperature, article, November 14, 1999; Tennessee. (digital.library.unt.edu/ark:/67531/metadc619116/: accessed December 13, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.