摘要
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。
This paper deals with the population dynamics of Lenolopa huizhouensis Lu, 1996 parasitic in the intestine of Scatophagus argus (Lin.) from January to December 1992 along the coast of Huangfu in Yuedong, Guangdong Province. The results indicated that the mean intensity, the mean abundance and mean crowding were positively correlated with the body length of the host, but the prevalence was relatively stable, except less 30mm of body length of the host. The longer the body length, the higher the mean intensity were, and vice versa, and so were the mean abundance and mean crowding. The prevalence, mean intensity and mean abundance of infection were irregular changes in different seasons in a year. The frequency distribution of the digenea parasitic in the host indicated that the most hosts were not infected or infected with less parasites, and a large number of digenea parasitic in the host of different group of body length and in different seasons all showed aggregated distribution. The degree of aggregation increased with the increasing of mean density of their population.
出处
《水生生物学报》
CAS
CSCD
北大核心
2002年第1期82-88,共7页
Acta Hydrobiologica Sinica
基金
国家自然科学基金资助项目 ( No.391 70 6 0 5 )
