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5 <br /> <br />Figure 1. Temperatures recorded by thermographs in aquaria where squawfish <br />larvae were subjected to temperature decreases of 5, 10, and 15 C in 19-24 <br />hrs in 1984 (A) and 1985 (8). The ranges shown in A include all <br />temperatures taken manually on any one day and reflects the difficulty in <br />controlling temperature with aquarium heaters. In 1985, temperatures were <br />stable, varying only ± 1.0 C.