Nature Publishing Group, publisher of Nature, and other science journals and reference works
Nature
my account e-alerts subscribe register
   
Monday 24 July 2017
Journal Home
Current Issue
AOP
Archive
Download PDF
References
Export citation
Export references
Send to a friend
More articles like this

Letters to Nature
Nature 188, 336 - 337 (22 October 1960); doi:10.1038/188336a0

A Fly Larva that tolerates Dehydration and Temperatures of −270° to +102° C.

H. E. HINTON

Department of Zoology, University of Bristol.

THE chironomid, Polypedilum vanderplanki Hint., breeds in small pools formed in shallow hollows on unshaded rocks in Horthern Nigeria and Uganda. The hollows are often only 5–9 in. deep, and during the rainy season they may fill and dry several times. When the pools dry up the larvæ also dry up and remain in this condition until it rains again, when, in about 1 hr. or so they resume feeding. The degree to which the larvæ dry up depends upon the relative humidity of the air. When moisture content was plotted against relative humidity, it was found that at 0 per cent relative humidity it was less than 3 per cent, at 60 per cent relative humidity it was 8 per cent, and at higher humidities the curve rose more steeply. In saturated air the moisture content altered from 3 to 33 per cent within 6 hr. at 25° C. The figures for moisture content are based on the assumption that the larva contains no water when its weight is constant at 106° C. The capacity to tolerate repeated dehydration is clearly of selective value to this species, and in the laboratory larvæ have survived as many as 10 dehydrations to a moisture content below 8 per cent. Between dehydrations they were allowed to feed in water, usually for 1–4 days.

  1. Hinton, H. E. , Trans. Soc. Brit. Ent., 11, 209 (1953).
  2. Hinton, H. E. , Proc. Zool. Soc. Lond., 121, 371 (1951). | ISI |
  3. Buxton, P. A. , J. Ecol., 12, 127 (1924).



© 1960 Nature Publishing Group
Privacy Policy