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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1 October 2008
Field Confirmation of Laboratory-Determined Lower Temperature Tolerance of Transgenic and Wildtype Zebra Danios, Danio Rerio
Cheryl Cortemeglia,
Thomas L. Beitinger,
James H. Kennedy,
Tammie Walters
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The American Midland Naturalist
Vol. 160 • No. 2
October 2008
Vol. 160 • No. 2
October 2008