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Some observations on the Biology and Structure of Ornithodorus savignyi, Andouin

Published online by Cambridge University Press:  06 April 2009

Norman Cunliffe
Norman Cunliffe
Affiliation:
Christopher Welch Lecturer in Economic Zoology, University of Oxford, and formerly Student in Medical Entomology, Quick Laboratory, Cambridge.
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Extract

1. The biology, as studied under laboratory conditions, of O. savignyi is very similar to that of O. moubata.

2. Females may oviposit over 400 eggs, of which at least 60 per cent, may be fertile; parthenogenesis does not occur.

3. An increase in temperature of 8° C. (from 22° C.) decreases the longevity of the female from 775 to 358 days, i.e. by 45 per cent.; an increase of 7° C. (from 30° C.) reduces the period required for the production of third stage nymphs by 26 per cent. At 30° C., the mean minimum periods required for metamorphosis are 60 days for males and 73 days for females (cf. O. moubata, 36 days for males and 45 days for females). Reproduction was inhibited at 37° C.

4. Moisture is an unfavourable factor, decreasing the vitality of the individual at each stage of growth.

5. Changes in external anatomy undergone during development are similar to those already described for O. moubata.

Type
Research Article
Information
Parasitology , Volume 14 , Issue 1 , April 1922 , pp. 17 - 26
Copyright
Copyright © Cambridge University Press 1922

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References

Cunliffe, N. (1921). Some observations on the biology and structure of Ornithodorus moubata, Murray. Parasitalogy, XIII. 327–347.CrossRefGoogle Scholar
Drake-Brockman, R. E. (1915). Some notes on the Bionomics of Ornithodorus savignyi in British Somaliland. Bull. Entom. Research, London, VI. 195–196.CrossRefGoogle Scholar
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Howlett, F. M. (1916). Report of Agric, Research Inst. Pusa 1914–15, 74–77.Google Scholar
Nuttall, G. H. F. and Warburton, C. (1908). Ticks, a monograph of the Ixodoidea, Pt. I. Cambridge.Google Scholar