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Life-cycle studies on Paulinia acuminata (DeGeer) (Orthoptera: Pauliniidae) with particular reference to the effects of constant temperature

Published online by Cambridge University Press:  10 July 2009

P. A. Thomas
P. A. Thomas
Affiliation:
Division of Agricultural Research, P. Bag. 0033, Gaborone, Botswana
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Abstract

The effects were examined of constant temperature on the life-cycle of Paulinia acuminata (Deg.), a potential biological control agent for Salvinia molesta. Over the range of temperatures tested (25–36°C), the duration of the life-cycle varied from approximately 85 days to 38 days. Egg development was most rapid at 33–36°C, but percentage hatch was greatest at 33–34°C. The duration of the nymphal period continued to decrease up to 36°C. The optimum temperature for nymphal development appeared to be higher than for eggs since temperature did not significantly affect nymphal mortality, which was about 50%. There were sometimes five and sometimes six instars, six being rather more common at lower than at higher temperatures. Crowded nymphs developed more slowly than isolated ones. Population growth rate statistics were calculated by combining data from several series of experiments. In an attempt to predict the results of a release of Paulinia at Lake Kariba between Zambia and Zimbabwe, these statistics were related to the mean annual temperature on the lake. It was estimated that P. acuminata would undergo three generations a year, with the population increasing by a factor of 8000 per annum.

Type
Original Articles
Information
Bulletin of Entomological Research , Volume 70 , Issue 3 , September 1980 , pp. 381 - 389
Copyright
Copyright © Cambridge University Press 1980

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References

Andrewartha, H. G & Birch, L. C. (1954). The distribution and abundance of animals.— 782 pp. Chicago, Ill., Univ. Chicago Press.Google Scholar
Bursell, E. (1964). Environmental aspects: temperature.— pp. 283–321 in Rockstein, M. (Ed.). The physiology of insecta. Volume I.—640 pp. New York and London, Academic Press.Google Scholar
Davidson, J. (1944). On the relationship between temperature and rate of development of insects at constant temperatures.—J. Anim. Ecol. 13, 26–38.CrossRefGoogle Scholar
Hattingh, E. R. (1961). The problem of Salvinia auriculata Aubl. and associated aquatic weeds on Kariba Lake.—Weed Res. 1, 303–306.CrossRefGoogle Scholar
Hunter-Jones, P. (1970). The effect of constant temperature on egg development in the desert locustSchistocerca (Forsk.).—Bull. ent. Res. 59, 707–718.CrossRefGoogle Scholar
Laughlin, R. (1965). Capacity for increase: a useful population statistic.—J. Anim. Ecol. 34, 77–91.CrossRefGoogle Scholar
Mitchell, D. S. (1969). The ecology of vascular hydrophytes on Lake Kariba.—Hydrobiologia 34, 484–564.CrossRefGoogle Scholar
Mitchell, D. S. (1970). The autecology of Salvinia auriculata on Lake Kariba.—Ph.D. thesis, Univ. London.Google Scholar
Mitchell, D. S. & Rose, D. J. W. (1979). Factors affecting fluctuations in extent of Salvinia molesta on Lake Kariba.—PANS 25, 171–177.CrossRefGoogle Scholar
Phelps, R. J. & Burrows, P. M. (1969). Prediction of the pupal duration of Glossina morsitans orientalis Vanderplank under field conditions.—J. appl. Ecol. 6, 323–337.CrossRefGoogle Scholar
Ricklefs, R. E. (1967). A graphical method for fitting equations to growth curves.—Ecology 48, 978–983.CrossRefGoogle Scholar
Rose, D. J. W. (1971). The biology and dispersal of Cicadulina spp. (Cicadellidae).—Ph.D. thesis, Univ. London.Google Scholar
Southwood, T. R. E. (1966). Ecological methods with particular reference to the study of insect populations.—391 pp. London, Methuen & Co. Ltd.Google Scholar
Steinberg, R. A. (1946). Mineral requirements of Lemna minor.—Pl. Physiol. 21, 42–48.CrossRefGoogle ScholarPubMed
Thomas, P. A. (1974). Investigations into the biology of Paulinia acuminata (DeGeer) (Orthoptera: Acrididae) with particular reference to the biological control of Salvinia auriculata.—M.Phil. thesis, Univ. London.Google Scholar
Uvarov, B. (1977). Grasshoppers and locusts. A handbook of general acridology. Vol. 2.—613 pp. London, Centre for Overseas Pest Research.Google Scholar
Wigglesworth, V. B. (1972). The principles of insect physiology.—7th edn., 827 pp. London, Chapman and Hall.CrossRefGoogle Scholar