Comparison of Upper Thermal Tolerances of Native and Nonnative Fish Species in Arizona

Autor:	Corissa J. Carveth, Scott A. Bonar, Ann M. Widmer
Rok vydání:	2006
Předmět:	Speckled dace Ecology Spikedace Aquatic Science Biology Minnow biology.organism_classification Gambusia biology.animal Poeciliopsis Gila topminnow Mosquitofish Ecology Evolution Behavior and Systematics Desert pupfish
Zdroj:	Transactions of the American Fisheries Society. 135:1433-1440
ISSN:	1548-8659 0002-8487
DOI:	10.1577/t05-025.1
Popis:	We used a lethal thermal method to estimate the upper thermal tolerances of 11 native and 7 nonnative fish species found throughout southern Arizona. Fish were acclimated to 25°C and 30°C. For all species tested, an increase in acclimation temperature resulted in a higher thermal tolerance value. Among the species acclimated to 25°C, desert pupfish Cyprinodon macularius, western mosquitofish Gambusia affinis, and Gila topminnow Poeciliopsis occidentalis were most tolerant to high temperature. Speckled dace Rhinichthys osculus, spikedace Meda fulgida, and loach minnow R. cobitis were least tolerant. Many native species demonstrated a limited ability to extend their upper temperature tolerances via acclimation. Our data suggest that several native species may be sensitive to increasing annual and large daily temperature fluctuations in Arizona's streams and rivers. Although southwestern native fishes were previously believed to be tolerant to high temperature due to their evolution in desert enviro...
Databáze:	OpenAIRE
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