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The effect of temperature on times to hatching of eggs of the nematode Ostertagia circumcincta

Published online by Cambridge University Press:  06 April 2009

R. R. Young ,
N. Anderson ,
D. Overend ,
R. L. Tweedie ,
K. W. J. Malafant  and
G. A. N. Preston
R. R. Young
Affiliation:
CSIRO Animal Health Research Laboratory, Private Bag No. 1, P.O. Parkville, Victoria 3052
N. Anderson
Affiliation:
CSIRO Animal Health Research Laboratory, Private Bag No. 1, P.O. Parkville, Victoria 3052
D. Overend
Affiliation:
Victorian Department of Agriculture, Regional Veterinary Laboratory, Benalla, Victoria 3672
R. L. Tweedie
Affiliation:
CSIRO Division of Mathematics and Statistics, P.O. Box 1965, Canberra City, A.C.T., 2601
K. W. J. Malafant
Affiliation:
CSIRO Division of Mathematics and Statistics, P.O. Box 1965, Canberra City, A.C.T., 2601
G. A. N. Preston
Affiliation:
Gas and Fuel Corporation of Victoria, 171 Flinders Street, Melbourne, Victoria 3000
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Summary

A delayed gamma distribution satisfactorily described the distribution of times to hatching of Ostertagia circumcincta eggs incubated in 0·1% saline at temperatures between 6 and 20 °C. Below 6 °C hatching of eggs was extremely variable. The relationship between rates of development and temperature within the range 10 to 20 °C was more closely described by a non-linear function than a linear one. The non-linear function was incorporated into a temperature summation equation which satisfactorily predicted the hatching of eggs incubated under conditions of alternating temperatures.

Type
Research Article
Information
Parasitology , Volume 81 , Issue 3 , December 1980 , pp. 477 - 491
Copyright
Copyright © Cambridge University Press 1980

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