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The cattle lice of Great Britain Part II. Lice populations

Published online by Cambridge University Press:  06 April 2009

H. J. Craufurd-Benson
H. J. Craufurd-Benson
Affiliation:
The Cooper Technical Bureau, Berkhamsted
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Extract

1. The seasonal variations and regional distribution of the cattle lice have been studied by monthly examinations of cattle at the Cooper Field Research Station.

2. Additional evidence has been obtained by the distribution of a questionnaire to farmers, the general results of which are included in this paper.

3. The seasonal variations of the populations of the four species of cattle lice in Great Britain are similar. The maximum population density is reached in February and March. In April and May there is a rapid decline until the populations reach their lowest level in June, July and August. In September, the lice start increasing in numbers till they reach their maximum density in February and March.

4. The regional distribution of the population varies in accordance with the seasonal variations of the whole population.

5. The various climatic factors that may affect the lice populations are discussed. It is considered that the light intensity is a factor of major importance in this country.

6. The various factors inherent in the host animal are discussed, and it is suggested that the seasonal fluctuations of the density of the animal's coat are important.

7. The finding of a previous paper (Craufurd-Benson, 1941) that the microclimatic temperature is important as affecting the hatching of eggs is discussed in relation to the variations of lice populations as a whole.

Type
Research Article
Information
Parasitology , Volume 33 , Issue 3 , August 1941 , pp. 343 - 358
Copyright
Copyright © Cambridge University Press 1941

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References

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