oa Journal of the Entomological Society of Southern Africa - Temporal fluctuations in the numbers of female mosquitoes trapped at a site in the western Orange Free State



The abundance and temporal distribution patterns of the females of the seven most abundant mosquito species trapped at weekly intervals over a period of three years were analysed in detail. Mean weekly catches and mean weekly climatic or climate-associated variables were used in all the analyses. The observed catch distributions were compared with moving average and unconditional circular distributions fitted to the same data. This approach identified the periods during which each species can be expected to occur and gave an indication of their relative numbers. The influence of individual variables or combinations of variables on the distribution and abundance was identified by model selection. The distribution of each species as calculated under its most successful model was compared with its observed distribution. In general there was good agreement between observed and calculated distributions. The limitations and value of the approach are discussed.


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