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目的探索输入性钉螺在模拟环境下螺点的形成情况。方法采用安徽省贵池自然生钉螺,按照雌雄各25、50、100、200、400、800只的剂量分别随机投入面积为4 m2的钉螺池中饲养约2年,每日记录钉螺及后代新螺生存、繁殖情况并进行统计学分析。结果 2011-2012年泥土表面总螺量呈下降趋势,不同剂量间泥土表面总螺数经秩和Wilcoxon W检验差异有统计学意义(P<0.01),新螺数经秩和Kruskal-Wallis检验,除12.5只/m2和100只/m2剂量组外,其他各组均有统计学意义。泥土表面总螺数2011、2012年剂量关系式分别为Y=19.08Inx-21.66(R2=0.217,调整R2=0.216,P<0.01,差异有统计学意义)和Y=6.31Inx-6.09(R2=0.299,调整R2=0.299,P<0.01,差异有统计学意义)。泥土表面新螺数2011、2012年剂量关系式分别为Y=0.05Inx+0.14(R2=0.002,调整R2=0.001,P>0.05,差异无统计学意义)和Y=0.39Inx-0.13(R2=0.041,调整R2=0.041,P<0.01,差异有统计学意义)。结论湖沼型钉螺在异地可以生殖繁衍,但各投螺剂量组在2年的观察期内未出现成规模的螺点,提示湖沼钉螺在水网地区生长繁殖不良。
Objective To explore the formation of spiral noses of imported snails in simulated environment. Methods Natural snails of Guichi, Anhui Province were used to feed snails of 25 m2, 100, 100, 200, 400, 800 respectively for 2 years. Spiro survival, reproduction and statistical analysis. Results From 2011 to 2012, the total surface cone of the soil showed a downward trend. The total surface sparse number of the soil surface between the different doses was significantly different from that of the Wilcoxon W rank test (P <0.01). The new snail number was analyzed by rank sum Kruskal-Wallis test, Except 12.5 / m2 and 100 / m2 dose groups, the other groups were statistically significant. The relationship between the total number of soil surface spirometry in 2011 and 2012 was Y = 19.08Inx-21.66 (R2 = 0.217, adjusted R2 = 0.216, P <0.01, the difference was statistically significant) and Y = 6.31Inx-6.09 0.299, adjusted R2 = 0.299, P <0.01, the difference was statistically significant). The dosimetric relationships of the new snails on the soil surface in 2011 and 2012 were Y = 0.05Inx + 0.14 (R2 = 0.002, adjusted R2 = 0.001, P> 0.05, with no significant difference) and Y = 0.39Inx-0.13 (R2 = 0.041, adjusted R2 = 0.041, P <0.01, the difference was statistically significant). Conclusion The larvae in the lake marsh can reproduce and reproduce in different places. However, the carapace size of the larvae did not appear to be large in the observation period of 2 years, suggesting that the larva of the lake marsh grows and reproduces poorly in the water network area.