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Fig. 9. Seasonal changes in metabolic rate (CO2 production in µl
h–1 g–1 dry mass) of C. clavipes
larvae (N=6–11) from near South Bend, Indiana and Fairbanks,
Alaska. Indiana larvae (IN) were collected on 8 November 2002 (autumn), 1
February 2003 and 3 June 2003. Alaska (AK) larvae were collected between 20
September and 3 October 2002 and either cold acclimated to –4.5°C
for one month (AK autumn 2002; see text for details) or held in a box
enclosure at ground level under Fairbanks field conditions until 16 January
2003 (AK January 2003 ground box). Alaska larvae were also collected on
19–22 March 2003 and 28–30 June 2003 and run immediately.
Metabolic rates were determined at 20, 10 and 0°C. Body water content (%
body water) is also shown for these larvae. Values are means ±
S.E.M. See text for statements on statistical
significance.
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