论文部分内容阅读
金钱鱼肠道内的惠州长宫吸虫 ,随着宿主体长的生长 ,其感染强度、平均丰盛度、平均拥挤度和宿主体长小于 3 0 mm的感染率呈逐渐增加的趋势 ,而宿主在不同体长组中 ,除了体长小于 3 0 mm以外 ,其感染率变化相对较稳定 ;在不同的月份中 ,吸虫在宿主体内的感染率从 2月起呈逐渐下降趋势 ,感染强度则有逐渐增大倾向 ;平均丰盛度除从 4～ 7月份有 1个明显先上升后下降的变化外 ,其它月份变化差异不大。从吸虫在宿主体内的频率分布变化中 ,表明多数宿主不感染或只感染少量的吸虫 ,而少数宿主感染吸虫数量较大 ;吸虫种群在不同宿主体长组和不同月份的分布格局类型均为聚集分布 ,在不同宿主体长组中聚集分布强度随着种群密度增加而增强。
As the length of the host grew, the infection rate, the average abundance, the average crowding degree and the infection rate of the host body length less than 300 mm tended to increase gradually while the host was different In the body length group, except for the body length less than 300 mm, the infection rate changed relatively stable. In different months, the infection rate of the flukes in the host declined gradually from February and the infection intensity gradually increased With a tendency of great abundance. There was no significant difference in other months except that there was a change from April to July that obviously increased and then decreased. From the changes of the frequency distribution of Trichinella in the host, it indicates that most hosts do not infect or only infect a small amount of Trilobite, while the number of Trichinella parasitica in a few hosts is relatively large. The distribution patterns of Trichinella spiralis in different host body long and different months are all aggregated Distribution, the intensity of aggregation distribution in different host body long groups increases with population density.