Mapping distributions of chromosomal forms of Anopheles gambiae in West Africa using climate data

被引:47
作者
Bayoh, MN [1 ]
Thomas, CJ [1 ]
Lindsay, SW [1 ]
机构
[1] Univ Durham, Sch Biol & Biomed Sci, Dept Biol Sci, Durham DH1 3LE, England
关键词
Anopheles gambiae; chromosomes; climatic zones; cytotypes; evapotranspiration; forest; GIS; incipient species; inversion polymorphism; karyotypes; malaria vectors; mapping; mosquito ecology; savanna; spatial ecology; West Africa;
D O I
10.1046/j.0269-283x.2001.00298.x
中图分类号
Q96 [昆虫学];
学科分类号
摘要
The mosquito Anopheles gambiae Giles sensu stricto (Diptera: Culicidae), the principal vector of malaria in West Africa, comprises several chromosomal forms (e.g. Bissau, Forest, Mopti, Savanna) associated with climatic zones. Here we show how climate data can be used to map the geographical distribution of these chromosomal forms. The climate at 144 sites surveyed for mosquitoes in West Africa between 1971 and 92 was determined using computerized climate surfaces. Forest and Bissau forms occurred at relatively wet sites: median annual precipitation 1325 mm and 1438 mm, respectively, interquartile ranges (IQR) 1144-1858 mm and 1052-1825 mm), whilst the Mopti form was found at dry sites (annual 938 mm, IQR 713-1047 mm) and the Savanna form at sites intermediate between the wet and dry forms (annual 1067 mm, IQR 916-1279). Logistic regression analyses of the climate variables were carried out on a stratified random sample of half the sites. The resulting models correctly classified over 80% of the sites for presence or absence of each chromosomal form. When these models were tested against excluded sites they were also correct at over 80% of sites. The combined data produced models that were correct at over 86% of sites. Mean annual precipitation, evapotranspiration, minimum temperature and maximum temperature were the most important climate variables correlated with the distribution of these forms of An. gambiae. We used the logistic models to map the distribution of each chromosomal form within the reported range for An. gambiae s.s. in West Africa employing a geographical information system. Our maps indicate that each chromosomal form favours particular climate envelopes in well-defined ecoclimatic zones, although these forms are sympatric at the edges of their ranges. This study demonstrates that climate can be used to map the distribution of chromosomal forms of insects across large areas.
引用
收藏
页码:267 / 274
页数:8
相关论文
共 38 条
[1]  
Akogbeto Martin, 1995, Journal of African Zoology, V109, P443
[2]  
Andrewartha HG., 1954, DISTRIBUTION ABUNDAN
[3]   SPECIES COMPOSITION AND INVERSION POLYMORPHISM OF THE ANOPHELES-GAMBIAE COMPLEX IN SOME SITES OF GHANA, WEST-AFRICA [J].
APPAWU, MA ;
BAFFOEWILMOT, A ;
AFARI, EA ;
NKRUMAH, FK ;
PETRARCA, V .
ACTA TROPICA, 1994, 56 (01) :15-23
[4]  
BAILEY RG, 1989, ENVIRON CONSERV, V16, P173
[5]   Distribution of genetic variation among chromosomal forms of Anopheles gambiae s.s.:: introgressive hybridization, adaptive inversions, or recent reproductive isolation? [J].
Black, WC ;
Lanzaro, GC .
INSECT MOLECULAR BIOLOGY, 2001, 10 (01) :3-7
[6]  
BOCKARIE MJ, 1995, TROP MED PARASITOL, V46, P164
[7]  
Bryan J.H., 1987, Parassitologia (Rome), V29, P221
[8]   INVERSION POLYMORPHISM AND INCIPIENT SPECIATION IN ANOPHELES-GAMBIAE S-STR IN THE GAMBIA, WEST-AFRICA [J].
BRYAN, JH ;
DIDECO, MA ;
PETRARCA, V ;
COLUZZI, M .
GENETICA, 1982, 59 (03) :167-176
[9]  
Chandre F, 1999, PARASSITOLOGIA, VOL 41, NOS 1-3, SEPTEMBER 1999, P319
[10]   Distribution of African malaria mosquitoes belonging to the Anopheles gambiae complex [J].
Coetzee, M ;
Craig, M ;
le Sueur, D .
PARASITOLOGY TODAY, 2000, 16 (02) :74-77