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- Title
THE INCUBATION PERIOD OF THE EGGS OF HALOTYDEUS DESTRUCTOR TUCKER (ACARINA) AT DIFFERENT TEMPERATURES.
- Authors
Davidson, J.; Swan, D. C.
- Abstract
The results are given of 21 experiments on the incubation period of the eggs of the mite Halotydeus destructor Tucker at 13 different, constant temperatures in the range 7. 8 to 27. 5° C. A total of 10,100 eggs were used, and about 90 p.c. of the eggs hatched in each experiment, except at 27.5° C, when only 51 p.c. hatched. The data have been fitted to a temperature-velocity curve and a temperature-time curve. A temperature-velocity curve having the formula: 100/y = 44.95/1 + e3.193706 - .16389x faithfully represents the trend in the speed of development of the eggs up to 22° C. (peak temperature). The greatest deviation of any of the ten observed points, within this range, from the calculated value, is .971 at 20° C. The root-mean square deviation between the observed and calculated points for the ten given temperatures is .4468 which is 1.9 p.c. of the calculated value at 20° C.
- Subjects
EGG incubation; BIRD embryology; MITES; HALOTYDEUS; TEMPERATURE
- Publication
Australian Journal of Experimental Biology & Medical Science, 1943, Vol 21, Issue 2, p107
- ISSN
0004-945X
- Publication type
Article
- DOI
10.1038/icb.1943.12