Critical Thermal Maxima of Captive-Bred Devils River Minnows (Dionda diaboli)

J. N. Fries; J. R. Gibson

doi:10.1894/RJE-02.1

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J. N. Fries,¹ J. R. Gibson¹

¹San Marcos National Fish Hatchery and Technology Center, 500 East McCarty Lane, San Marcos, TX 78666

Abstract

For captive-bred Devils River minnows (Dionda diaboli), which are federally listed as threatened, we measured critical thermal maxima when they were acclimated at 18, 22, 24, and 27°C. Critical thermal maxima were 32.6, 34.3, 35.3, and 37.8°C and were positively correlated with temperatures of acclimation, but not with either gender or size. There was high pre-test mortality (39%) for fish held at 28°C for 72 days.

Citation Download Citation

J. N. Fries and J. R. Gibson "Critical Thermal Maxima of Captive-Bred Devils River Minnows (Dionda diaboli)," The Southwestern Naturalist 55(4), 544-550, (1 December 2010). https://doi.org/10.1894/RJE-02.1

Received: 15 March 2009; Accepted: 1 April 2010; Published: 1 December 2010

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