The influence of constant and fluctuating temperatures on development rate and survival of pupae of the Australian sheep blowfly Lucilia cuprina
1984
Dallwitz, R.
Functions describing instantaneous development rates in constant and natural temperature regimes were obtained for pupae of the Australian sheep blowfly, Lucilia cuprina (Wiedemann). These were derived using a technique that directly calculates rate functions from development-time observations made under any temperature regime. The functions indicated similar instantaneous development rates for constant and natural temperatures up to 30 ° C. At 30° the constant-temperature function reached a plateau which was maintained to the constant-temperature thermal limit. The natural-temperature function, however, continued its ascending phase to 34°, and then fell sharply to zero at 42°. The median survival temperatures of pupae for single 7-h exposures, daily 7-h exposures, and continuous exposures to high temperatures were 44.7, 39.2, and 34.4°, respectively. Development was completed at constant 15° but not at 10°. Median survival times at constant 10, 5, 0 and −5° were 4.3, 4.2, 2.5 and 1.5 days. Mortality was slight for single or daily 7-h exposures to −5°, but was complete for all except brief single exposures to −10°.
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