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On the origin of the wet-season form of Zonocerus variegatus (L.) (Orth., Acrididae) in southern Nigeria, with some biological notes

Published online by Cambridge University Press:  10 July 2009

T. Ajibola Taylor
T. Ajibola Taylor
Affiliation:
Department of Agricultural Biology, University of Ibadan, Ibadan, Nigeria
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Extract

Previous reports and field observations at Ibadan and in northern Nigeria have established the occurrence of a dry-season form and a wet-season form of Zonocerus variegatus (L.). The wet-season form in the savanna areas of northern Nigeria is shown to be virtually identical with that from southern Nigeria on the basis of breeding seasons, habitat and morphometrics. Morphometrics show the wet- and dry-season forms to be distinct. It is suggested that the dry-season form in the wet rain forest zone spread into the dry savanna areas giving rise to a wet-season form adapted to the different climatic conditions. The increasing occurrence of the wetseason form in the south probably represents a re-invasion by the northern wetseason form.

Type
Original Articles
Information
Bulletin of Entomological Research , Volume 61 , Issue 4 , June 1972 , pp. 661 - 667
Copyright
Copyright © Cambridge University Press 1972

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References

Chapman, R. F. (1962). The ecology and distribution of grasshoppers in Ghana.—Proc. zool. Soc. Lond. 139, 1–66.CrossRefGoogle Scholar
Golding, F. D. (1934). On the ecology of Acrididae near Lake Chad.—Bull. ent. Res. 25, 263–303.CrossRefGoogle Scholar
Golding, F. D. (1940). Notes on the variegated grasshopper, Zonocerus variegatus L., in Nigeria.—Bull. ent. Res. 30, 543–550.CrossRefGoogle Scholar
Golding, F. D. (1948). The Acrididae (Orthoptera) of Nigeria.—Trans. R. ent. Soc. Lond. 99, 517–587.Google Scholar
Hamilton, A. G. (1936). The relation of humidity and temperature to the development of three species of African locusts—Locusta migratoria migratorioides (R. & F.), Schistocerca gregaria (Forsk.), Nomadacris septemfasciata (Serv.).—Trans. R. ent. Soc. Lond. 85, 1–60.CrossRefGoogle Scholar
Jago, N. D. (1968). A checklist of the grasshoppers (Orthoptera, Acrididae) recorded from Ghana, with biological notes and extracts from the recent literature.—Trans. Am. ent. Soc. 94, 209–353.Google Scholar
Kennedy, J. S. (1949). A preliminary analysis of oviposition behaviour by Locusta (Orthoptera, Acrididae) in relation to moisture.—Proc. R. ent. Soc. Lond. (A) 24, 83–89.Google Scholar
Lamborn, W. A. (1914). The agricultural pests of the southern provinces, Nigeria.—Bull. ent. Res. 5, 197–214.CrossRefGoogle Scholar
Maxwell-Darling, R. C. (1934). The solitary phase of Schistocerca gregaria in north eastern Kordofan (Anglo-Egyptian Sudan).—Bull. ent. Res. 25, 63–84.CrossRefGoogle Scholar
Maxwell-Darling, R. C. (1936). The outbreak centres of Schistocerca gregaria, Forsk., on the Red Sea Coast of the Sudan.—Bull. ent. Res. 27, 37–70.CrossRefGoogle Scholar
Nanta, J. P. (1954). Les principaux insectes et nématodes nuisibles au caféier en Afrique occidentale.—Bull. sci. Sect. tech. Agric. trop. no. 5, 457–479.Google Scholar
Oyidi, O. (1966). Variation and variability in Orthopteran insects.—211 pp. Ph.D. thesis, University of London.Google Scholar
Oyidi, O. (1968 a). Variation and variability in Orthopteran insects II. The correlation be tween chiasma frequency and terminal chiasmata in natural populations of Zonocerus variegatus (L.) (Acrididae).—J. W. Afr. Sci. Ass. 13, 53–60.Google Scholar
Oyidi, O. (1968 b). Variation and variability in Orthopteran insects. V. Notes on the biological status of Zonocerus variegatus L. (Acrididae) in Nigeria, with particular reference to the relationship between the dry and wet season population.—J. W. Afr. Sci. Ass. 13, 159–164.Google Scholar
Ramachandra, Rao Y. (1934). The life-cycle, particularly sexual maturation, in relation to climatic and other factors and methods of study.—Proc. 3rd int. Locust Conf. 1934, 67–73.Google Scholar
Uvarov, B. P. (1928). Locusts and grasshoppers—A handbook for their study and control.—352 pp. London, Imperial Bureau of Entomology.Google Scholar