Download Mosquito Ecology: Field Sampling Methods by M. W. Service PDF

By M. W. Service

Mosquitoes are vectors of disorder to people, spreading malaria to an expected 260 million humans and inflicting a few 1 to two million deaths a yr. a variety of tools were devised to capture mosquitoes and plenty of methods hired to check their ecology and behavior. This version contains paintings on components akin to estimating grownup survivorship and new sampling equipment. It offers targeted descriptions and important reviews of traps and sampling equipment which have been used to check egg, larval and grownup populations. additional information has been incorporated on mosquito behaviour and ecology, akin to how mosquitoes find their hosts and are drawn to traps, larval aggregation and dispersal styles, oviposition attractants and density dependant mortalities. New sections describe tools of distant sensing of larval habitats, blood-meal identity, forage ratios, measurements of vectorial potential, and statistical issues similar to pattern size.
This booklet is aimed toward box staff enthusiastic about mosquito surveillance and keep watch over who desire to replace their wisdom on equipment for sampling larval and grownup populations; scientists operating within the sector of ailment epidemiology who want to know the equipment to be had for measuring mosquito survival charges and dispersal; these whose curiosity is within the ecology and inhabitants dynamics of mosquitoes who're trying to find an advent to the literature.

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Best results were obtained when the sods were changed at 3-week intervals for Culex tarsalis, and every 1-3 weeks for Culex restuans. Buth et al. (1990) made similar pools to collect egg rafts of these two species and also Culiseta inornata. Madder et al. (1980) used inflated plastic paddling pools (84 em diameter) lined with a layer of sods and filled with tap water as oviposition sites in Canada for Culex pipiens and Culex restuans. From a series of pools they collected 13 606 egg rafts over about 3ยท5 months.

00 NOT DISTURB FIG. 7. Hoban & Craig (1981) type Culex ovitrap (courtesy of L. Leiser). Jersey light-trap, which operated from 2200--0600 hr daily, from May to October. A total of 365992 mosquitoes were collected from the light-traps, including 25232 female and 35051 male Culex spp. At the same time 4193 Culex egg rafts of Culex pipiens or Culex restuans were retrieved from the ovitraps. Both sampling methods showed that Culex populations peaked in July, when in a single week the maximum catch was 18856 adults in the light-traps, and a week later a peak of 960 egg rafts were collected.

Since the eggs were not evenly distributed it was decided to find out whether their distribution was related to topographical features of the pond. First, the numbers of eggs extracted from the samples were grouped into categories corresponding with the successive heights I .... 85cm ~ u II) E gc ~ u E FIG. 5. (a) Map of a pond showing positions of transects and area covered at the different centre depths shown (em) (Enfield & Pritchard, 1977); (b) Core sampler for tree-holes, a - auger, b - barrel of corer, c - cap, gc - guiding col/ar, h - wooden handle, se - sharpened edge; ss - stop screw (Kitching, 1971).

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