关键词: 鼠形动物, 蚊, 蝇, 种群分布

Abstract: Objective To investigate the population,distribution and seasonal growth-decline of mosquitoes,flies and murine-like animals and their external parasites in China Off-shore Oil Nanhai West Corporation (CONHW). Methods Applying cage trap and net catches methods to catch flies,house catches method at night to cafch mosquitoes,night nip trap and cage trap methods to catch the murine-like animals. Results The mosquitoes were identified as 2 subfamilies,4 genera,4 species,Culex pipiens fatiganswas predominant species and accounted for 65.4% ,its annual average density was 32.0 per hour per person,peak in February and lowest in July. The flies belonged to 5 families,20 subfamilies,57 genera,128 species,the annual average density is 36.6 flies per cage per day. Chrysomyinae was most and accounted for 63.4% ; the highest density appeared in February,the lowest in November. There were 7 species of murine-like animal (4 genera,3 families,2 orders) and two kinds of external parasite: 2 species of gamasid mite (2 genera,and 1 family) and 2 species of flea (2 gen,2 fam). The yearly percentage of animals infected with flea and gamasid mite was 23.7% and 36.2% respectively. The animals infected with most flea and Gamasid mite was Rattus norvgicus and R.rattus hainanicus G.M Allen. The yearly indexes of animal infected with flea and Gamasid mite were 0.7 and 1.8 respectively. The animals with the highest indexes were R.norvegicus andR.rattus hainanicus G.M Allen. The corresponding months with highest and lowest infection rate in flea was in May and from August to December respectively. The mean annual density of rodent was 1.2% in CONHW. Conclusion Potential Bio-vectors of infectious disease such as plague,cholera and yellow fever etc. exist in CONHW,more attention should be paid to control them.