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Studies on ticks of veterinary importance in Nigeria—V. The size, hatching patterns and mortality rates of eggs of Amblyomma variegatum (Fabricius 1794)

Published online by Cambridge University Press:  19 September 2011

O. O. Dipeolu
O. O. Dipeolu
Affiliation:
Department of Veterinary Microbiology and Parasitology, University of Ibadan, Ibadan, Nigeria
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Abstract

The lengths, breadths and areas of eggs oviposited at different times by female ticks (Amblyomma variegatum) of weight 2–3 and 0.5–1 were compared. The hatching patterns as well as mortality rates of different ovipositions of female A. variegatum of weight 2–3 g were studied at various incubation temperatures.

The eggs produced by female ticks of A. variegatum of weight 2–3 g were generally longer and broader, with a greater area also than those produced by female ticks of weight 0.5–1 g. The hatching pattern was influenced only by temperature and not by the order of oviposition of the eggs. The period of completion of all hatchings and the day of peak hatching vary according to the temperature at which the eggs were incubated. The occlusion periods of the eggs varied with their order of oviposition. It was longest in the first oviposition and shorter in the subsequent ones. Temperature also influenced the rate of mortality of the eggs. Mortality was low among eggs incubated at 24°C and rotational temperature.

Keywords

Amblyomma variegatumhatching patternsmortality of eggsocclusion periodseffect of temperature
Type
Research Articles
Information
International Journal of Tropical Insect Science , Volume 3 , Issue 2-3 , September 1982 , pp. 227 - 231
Copyright
Copyright © ICIPE 1982

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References

REFERENCES

Dipeolu, O. O. (1975) Survey of tick infestation in the trade cattle and sheep and goats in Nigeria. Bull. Animal Hlth Production Africa 23, 165–172.Google Scholar
Dipeolu, O. O. and Ogunji, F. O. (1977) Studies on ticks of veterinary importance in Nigeria. I. On the development of the ixodid ticks Amblyomma variegatum Fabricius 1794 and Hyalomma rufipes Koch 1844 under quasi natural conditions in Nigeria. J. pharm. med. Sci. 1, 245–248.Google Scholar
Dipeolu, O. O. and Ogunji, F. O. (1980) Studies on ticks of veterinary importance in Nigeria. II. Oviposition and occlusion patterns of Amblyomma variegatum Fabricius 1794 in relationship to state of engorgement. Bull. Animal Hlth Production Africa 28, 260–280.Google Scholar
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