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Correlating water temperature and st...

Beachum, Collin E.

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Correlating water temperature and stream flow with performance-related traits in two species of freshwater fishes.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Correlating water temperature and stream flow with performance-related traits in two species of freshwater fishes./
作者:	Beachum, Collin E.
面頁冊數:	127 p.
附註:	Source: Dissertation Abstracts International, Volume: 75-11(E), Section: B.
Contained By:	Dissertation Abstracts International75-11B(E).
標題:	Ecology. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3627363
ISBN:	9781321025347

Correlating water temperature and stream flow with performance-related traits in two species of freshwater fishes.
Beachum, Collin E.

Correlating water temperature and stream flow with performance-related traits in two species of freshwater fishes. - 127 p.

Source: Dissertation Abstracts International, Volume: 75-11(E), Section: B.

Thesis (Ph.D.)--Saint Louis University, 2014.

This item must not be sold to any third party vendors.

Climate change is expected to alter the physical environment to which organisms are adapted. These changes will include increasing water temperatures and altered hydrologic regimes that may affect aquatic taxa through impacts on physiological traits. Consequently, understanding the potential effects of climate change on local populations of aquatic taxa requires an approach that integrates physiological trait data and local environmental conditions among populations. I investigated whether routine metabolic rate (RMR), swim performance (Ucrit), and body shape were correlated with local temperature and stream flow conditions in populations Pimephales notatus, a widely distributed and common North American freshwater fish species. RMR and Ucrit data were collected at three temperature treatments (9°C, 18°C, and 27°C) and then correlated with thermal measures at collection locations. Body shape was also measured from freshly preserved specimens of P. notauts and Etheostoma nigrum, a benthic fish species that commonly co-occurs with P. notatus. Body shape measurements from these species were correlated with water velocity measured at the time of collection and mean monthly stream discharge from the year prior to the collection date. Multiple linear regression techniques were used to determine the relationships between the species traits and the environmental variables. For P. notatus, RMR was negatively correlated with weekly low temperature at 9°C, negatively correlated with weekly high temperature and mass at 18°C, and positively correlated with these variables at 27°C. Thermal sensitivity was negatively correlated with weekly high temperature. Ucrit was correlated with body shape among populations of P. notatus at 9°C and 27°C, and low weekly temperature of the collection site at 18°C. Body shape of P. notatus was correlated with stream discharge, while E. nigrum body shape was correlated with water velocity. Overall, these results suggest that increases in water temperature and modifications to hydrologic regimes may influence individual performance at the population level, potentially altering future distributions of these taxa.

ISBN: 9781321025347Subjects--Topical Terms:

516476
Ecology.

Correlating water temperature and stream flow with performance-related traits in two species of freshwater fishes.
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