Kirkhoff Christopher J, Simmons Thomas W, Hutchinson Michael
Department of Biology, Indiana University of Pennsylvania, Indiana, Pennsylvania 15705, USA.
J Parasitol. 2013 Feb;99(1):31-9. doi: 10.1645/GE-3105.1. Epub 2012 Aug 27.
A survey of water mite larvae parasitizing adult mosquitoes was conducted throughout Pennsylvania. In total, 929,873 individuals and 46 species of mosquitoes were collected from 6,499 sites, and mites were examined from a subset of the parasitized mosquitoes. From 282 of the sites, 1,836 mosquitoes were parasitized by 4,769 mites, with a mean intensity of 2.6, ranging from 1 to 31. Twenty-one species of mosquitoes representing Aedes, Anopheles, Coquillettidia, Culex, Ochlerotatus, Orthopodomyia, and Psorophora were parasitized by 1 Parathyas sp., 7 Arrenurus spp., and 7 Arrenurus morphotypes. All mite species are documented from Pennsylvania for the first time. The largest numbers of hosts were Coquillettidia perturbans and Ochlerotatus trivittatus, and of parasites were Arrenurus danbyensis and Parathyas barbigera. Aedes spp., Ochlerotatus spp., and Psorophora ferox were mostly parasitized by P. barbigera, Anopheles spp. and Cq. perturbans mostly by Arrenurus spp., and Culex spp. by both P. barbigera and Arrenurus spp. Thirty-three different associations were observed, and 17 of these are new records. Parasitism of individual mosquitoes by more than 1 mite species was rare. Most P. barbigera individuals were attached on the pre-abdominal region of their hosts, and, when not in this position, they were attached anterior on the thorax, and less commonly on the cervix or abdomen. Most A. danbyensis and Arrenurus delawarensis individuals were attached to the cervix of Cq. perturbans. Arrenurus danbyensis on Cq. perturbans had mean and maximum intensities of 2.8 and 31, and showed a clear trend in attachment site distribution, with sequential progression from head to abdomen.
在宾夕法尼亚州全境开展了一项关于寄生于成年蚊子的水螨幼虫的调查。总共从6499个地点收集了929873只蚊子，分属46个种类，并对部分被寄生的蚊子中的螨类进行了检查。在282个地点，1836只蚊子被4769只螨寄生，平均感染强度为2.6，范围从1至31。代表伊蚊属、按蚊属、库蠓属、库蚊属、奥氏蚊属、直脚蚊属和骚蚊属的21种蚊子被1种拟泰氏螨属、7种阿氏螨属和7种阿氏螨形态型寄生。所有螨类物种均为首次在宾夕法尼亚州被记录。寄主数量最多的蚊子是骚扰库蠓和三带喙库蚊，而寄生螨数量最多的是丹氏阿氏螨和具须拟泰氏螨。伊蚊属、奥氏蚊属和凶猛骚蚊大多被具须拟泰氏螨寄生，按蚊属和骚扰库蠓大多被阿氏螨属寄生，库蚊属则被具须拟泰氏螨和阿氏螨属共同寄生。观察到33种不同的寄生组合，其中17种为新记录。一只蚊子被多种螨类物种寄生的情况很罕见。大多数具须拟泰氏螨个体附着在寄主的腹部前端区域，若不在此位置，则附着在胸部前端，较少附着在颈部或腹部。大多数丹氏阿氏螨和德拉瓦阿氏螨个体附着在骚扰库蠓的颈部。寄生在骚扰库蠓上的丹氏阿氏螨的平均感染强度和最大感染强度分别为2.8和31，且在附着部位分布上呈现出明显的趋势，即从头部到腹部依次递进。
