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Field Confirmation of Laboratory-Determined Lower Temperature Tolerance of Transgenic and Wildtype Zebra Danios, Danio rerio

Cheryl Cortemeglia, Thomas L. Beitinger, James H. Kennedy and Tammie Walters
The American Midland Naturalist
Vol. 160, No. 2 (Oct., 2008), pp. 477-479
Stable URL: http://www.jstor.org/stable/20491404
Page Count: 3
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Field Confirmation of Laboratory-Determined Lower Temperature Tolerance of Transgenic and Wildtype Zebra Danios, Danio rerio
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Abstract

A transgenic variety (red glofish) of the aquarium fish, zebra danio (Danio rerio) and wildtype zebra danios were exposed to the natural climate of north Texas in four, outside, 10,000-L microcosms during the winter of 2004-2005. At least 13 of 68 fish survived at temperatures as low as 7.5 C; however, none survived a 4 d exposure to 4 C following a cold front. These field results corroborate laboratory findings that the lowest temperature that these two varieties of D. rerio can survive is about 5 C.

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