Predicting the spatial distribution of Ochlerotatus albifasciatus (Diptera: Culicidae) abundance with NOAA imagery

被引:6
|
作者
Gleiser, R. M. [1 ]
Gorla, D. E. [2 ]
机构
[1] Univ Nacl Cordoba, Fac Ciencias Agropecurias, CONICET, Ctr Evaluac & Relevamiento Recursos Agricolas & N, RA-5000 Cordoba, Argentina
[2] Ctr Reg Invest Cientificas & Transferencia Tecnol, RA-5301 Anillaco, Argentina
关键词
Ochlerotatus; Culicidae; remote sensing; AVHRR/NOAA; NDVI; surveillance;
D O I
10.1017/S0007485307005287
中图分类号
Q96 [昆虫学];
学科分类号
摘要
Ochlerotatus albifasciatus is a vector of western equine encephalomyelitis in Argentina and a nuisance mosquito affecting beef and dairy production. The objective of this study was to analyze whether environmental proxy data derived from 1 km resolution NOAA-AVHRR images could be useful as a rapid tool for locating areas with higher potential for Oc. albifasciatus activity at a regional scale. Training sites for mosquito abundance categories were 3.3 x 3.3 km polygons over sampling sites. Abundance was classified into two categories according to a proposed threshold for economic losses. Data of channels 1, 2, 4 and 5 were used to calculate five biophysical variables: normalized differences vegetation index (NDVI), land surface temperature, total precipitable water, dew point and vapour saturation deficit. A discriminant analysis correctly classified 100% of the areas predicted to be above or below the economic threshold of 2500 mosquitoes per night of capture, respectively. Components of the NDVI, the total precipitable water and the dew point temperature contributed most to the function value. The results suggest that environmental data derived from AVHRR-NOAA could be useful for rapidly identifying adequate areas for mosquito development or activity.
引用
收藏
页码:607 / 612
页数:6
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