Lethal Thermal Maxima for Age‐0 Pallid and Shovelnose Sturgeon: Implications for Shallow Water Habitat Restoration |
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| Authors: | D Deslauriers L Heironimus S R Chipps |
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| Affiliation: | 1. Department of Natural Resource Management, South Dakota State University, Brookings, South Dakota, USA;2. Department of Biological Sciences, University of Manitoba, Winnipeg, Manitoba, Canada;3. Lodi Fish and Wildlife Office, US Fish and Wildlife Service, Lodi, California, USA;4. US Geological Survey, South Dakota Cooperative Fish and Wildlife Research Unit, Department of Natural Resource Management, South Dakota State University, Brookings, South Dakota, USA |
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| Abstract: | We evaluated temperature tolerance in age‐0 pallid and shovelnose sturgeon (Scaphirhynchus albus and Scaphirhynchus platorynchus), two species that occur sympatrically in the Missouri and Mississippi Rivers. Fish (0.04–18 g) were acclimated to water temperatures of 13, 18 or 24 °C to quantify temperatures associated with lethal thermal maxima (LTM). The results show that no difference in thermal tolerance existed between the two sturgeon species, but that LTM was significantly related to body mass and acclimation temperature. Multiple linear regression analysis was used to estimate LTM, and outputs from the model were compared with water temperatures measured in the shallow water habitat (SWH) of the Missouri River. Observed SWH temperatures were not found to yield LTM conditions. The model developed here is to serve as a general guideline in the development of future SWH. Copyright © 2016 John Wiley & Sons, Ltd. |
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| Keywords: | lethal thermal maxima pallid sturgeon shovelnose sturgeon body size temperature shallow water habitat |
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