Hostname: page-component-78c5997874-m6dg7 Total loading time: 0 Render date: 2024-11-10T14:58:59.122Z Has data issue: false hasContentIssue false
  • English
  • Français

Vertical estimates of survivorship of larvae and pupae of Anopheles gambbiae Giles complex in Baringo District, Kenya

Published online by Cambridge University Press:  19 September 2011

Ifeanyi Aniedu ,
Mutuku J. Mutinga  and
Clifford M. Mutero
Ifeanyi Aniedu
Affiliation:
The International Centre of Insect Physiology and Ecology (ICIPE), P. O. Box 30772, Nairobi, Kenya
Mutuku J. Mutinga*
Affiliation:
The International Centre of Insect Physiology and Ecology (ICIPE), P. O. Box 30772, Nairobi, Kenya
Clifford M. Mutero
Affiliation:
The International Centre of Insect Physiology and Ecology (ICIPE), P. O. Box 30772, Nairobi, Kenya
*
+To whom correspondence should be addressed.
Get access

Abstract

The stage-specific and age-specific survivorship of the immature stages of Anopheles gambiae Giles s. l. were studied in Baringo District Kenya, using vertical life-table methods.

Survivorship from first instar to adult emergence was 0.085, giving a mortality of 91.5% during the rainy season. However, survivorship dropped to zero (100% mortality) in the dry season.

Mortality was most severe in the first and second instars in all cases. Mean life expectancy increased significantly for larvae that survived beyond the first 3 days of life. Suspected predators of mosquito pre-imagines in the breeding sites were collected and counted. From their large numbers and diversity it was inferred that predation was probablyan important mortality factor.

Résumé

L'état spécifique et l'age spéciflque des stades immature d'Anopheles gambiae Giles s. l. ont été étudiés dans le District de Baringo au Kenya, en utilisant des méthodes verticales de table de survie.

La survie de 1er stade jusqu'à I'immergence de l'adulteétait de 0.085, avec une mortalité s'élévant à 91.5% pendant la saison des pluies. Cependant, la survie tombait à 0 (100% de mort) pendant la saison seche.

Dans tous les cas, la mortallté était élévée pendant le 1er et le 2e stade de developpement. La moyenne de survie à augmenté d'une façon significative pour les larves qui ont survecu au déla de leur trois premiers jours de vie. Les prédateurs suspectcs des moustiques immatures dans les lieux de ponte étaient collectés et comptés. A partir de leur nombre éléve et leur diversité, il était conclu que la prédation était probablement un facteur important de mortalité.

Keywords

MosquitoesAnopheles gambiaesurvivorshiplife tablesMoustiquesAnopheles gambiaetable de survie
Type
Research Articles
Information
International Journal of Tropical Insect Science , Volume 14 , Issue 1 , February 1993 , pp. 39 - 48
Copyright
Copyright © ICIPE 1993

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

Bates, M. (1941) Field studies on the anophcline mosquitoes of Albania. Proc. entomol. Soc. Wash. 43, 37–38.Google Scholar
Christine, M. (1958) Predation ofAnopheles gambiae Giles. J. trop. Med. Hyg. 61, 168–176.Google Scholar
Lakhani, K. H. and Service, M. W. (1974) Estimated mortalities of the immature stages of Aedes cantans (Mg.) (Diptera: Culicidae) in a natural habitat. Bull, entomol. Res. 64, 265–276.Google Scholar
Mogi, M., Miyagi, I. and Cabrera, B. D. (1984) Development and survival of immature mosquitoes (Diptera: Culicidae) in Philippine rice fields. J. Med. Entomol. 21, 283–291.CrossRefGoogle ScholarPubMed
Mogi, M., Okawaza, T., Miyagi, I., Sucharit, S., Tumrasvin, W., Deesin, T. and Khamboonruang, C. (1986) Development and survival of the anopheline immatures (Diptera: Culicidae) in rice fields in Northern Thailand. J. Med. Entomol. 23, 244–250.CrossRefGoogle ScholarPubMed
Mutero, C. M. and Birley, M. H. (1987) Estimation of the survival rate and the ovipositioncycle of field populations of malaria vectors in Kenya. J. Appl. Ecol. 24, 853–863.CrossRefGoogle Scholar
Reisen, W. K., Azara, K. and Mahmood, F. (1982) Anopheles culicifacies (Diptera: Culicidae): Horizontal and vertical estimates of immature development and survivorship in rural Punjab province, Pakistan. J. Med. Entomol. 19, 413–422.CrossRefGoogle ScholarPubMed
Reisen, W. K. and Siddiqui, T. F. (1979) Horizontal and vertical estimates of immature survivorship for Culex tritaeniorhynchus (Diptera: Culicidae) in Pakistan. J. Med. Entomol. 16, 207–218.CrossRefGoogle ScholarPubMed
Service, M. W. (1970) Studies on sampling larval populations of Anopheles gambiae complex. WHO document, WHO/BC/70. 247.Google Scholar
Service, M. W. (1971) Studies on sampling larval populations of the Anopheles gambiae complex. Bull. Wld. Hlth. Org. 45, 169–180.Google ScholarPubMed
Service, M. W. (1973) Mortalities of the larvae of Anopheles gambiae Giles complex and the detection of predators by the precipitin test. Bull. entomol. Res. 62, 359–369.CrossRefGoogle Scholar
Service, M. W. (1976) Mosquito Ecology, Field Sampling Methods. Applied Science Publishers Ltd., London.Google Scholar
Service, M. W. (1977) Mortalities of the immature stages of the species B of the Anopheles gambiae complex in Kenya: Comparison between rice fields and temporary pools, identification of predators, and effects of insecticidal spraying. J. Med. Entomol. 13, 535–545.CrossRefGoogle ScholarPubMed
Slobod, Kin L. B. (1962) Growth Regulations of Animal Populations. Holt, Rinehart and Winston. New York.Google Scholar
Varley, G. C., Gradwell, G. R. and Hassel, M. P. (1975) Insect Population Ecology: An Analytical Approach. Blackwell Scientific Publications, Oxford.Google Scholar
White, G. B. and Rosen, P. (1973) Ecology of species A and B ofAnopheles gambiae in savanna around Kaduna, Nigeria. Bull. entomol. Res. 62, 613–625.CrossRefGoogle Scholar