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1.上饶黄市乡的钉螺,除7月份未发现交配钉螺外,其余各月均有交配钉螺,其中以冬春两季交配率较高,秋季次之,夏季最低。2.进行了全年的钉螺解剖,观察钉螺生殖器官的发育,自9月份开始卵巢内含有卵细胞,直至次年6月止,而且自10月份起输卵管内已有成熟螺卵,同时卵巢内含卵细胞钉螺数增加,直至次年4、5月份后,逐渐下降,至 6月份仅有少数钉螺含卵细胞,7、8月不含卵细胞。输卵管内含成熟螺卵的钉螺百分率,以3月份为最高。3.从上饶黄市乡野外筛得螺卵最多的月份,是3、4两个月,7、8、9、10、11月均未筛到螺卵,与雌螺卵巢内含卵细胞钉螺百分率相比较基本上一致。4.该乡幼螺出现最多的月份是4、5、6、7、8,五个月,10月后至次年3月均未发现幼螺,幼螺的出现与从野外筛得螺卵及卵巢内含卵细胞的情况也基本上一致。
1. Oncomelania in Huangshi Township, Shangrao, except for the mating snail in July, there are mating snails in other months, of which the mating rate in winter and spring is higher, the autumn is the second and the lowest in summer. 2. conducted a year snail anatomy observed snail genital organ development since September ovarian ovulation contains until the end of June the following year, and since October tubal has mature spiro eggs, ovarian and internal The number of snails in egg cells increased until April and May of the following year, but gradually decreased to only a few snail eggs in June, without ovum in July and August. Fallopian tube containing mature snail snail percentage, the highest in March. 3. Shangrao yellow Township screen out the snail eggs in the most months, 3,4 months, two months, 7, 8, 9, 10, November were not screened eggs, and female snail ovary containing snail percentage Compared with basically the same. 4. The township snail appears the most in the months 4,5,6,7,8, five months, after October to March the following year did not find young snails, snails appearance and from the wild snail eggs And ovarian cells containing the situation is basically the same.