| 福建省同安县残存钉螺回升及个体变小的原因探讨 |
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| 引用本文： | 李友松.福建省同安县残存钉螺回升及个体变小的原因探讨[J].武夷科学,1997(1). |
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| 作者姓名： | 李友松 |
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| 作者单位： | 福建省寄生虫病研究所!福州35000l |
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| 摘 要： | 1993年即距未次查到钉螺并加以消灭后的第15年,在福建省同安县原钉螺孳生地发现一处4650m~2山坑螺区。钉螺分布的范围、密度已恢复到原始状态。发育成熟的钉螺个体明显变小,经测量:螺层数为4.65(3—5);螺壳长与宽分别为4.76(3.7—5.8)mm和2.27(2.1—2.6)mm,明显小于60—70年代螺和1993年同期捕捉于福建省福清市的同种钉螺。调查结果说明,残存钉螺回升在福建省山丘地区仅需15年左右。钉螺个体明显变小的主要原因可能系短时间内大量繁殖、营养不足、近亲交配、幼龄生育等;次要原因系山地开发、水土冲刷、孳生地贫瘠。
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| 关 键 词： | 钉螺 福建 |
ON REASONS OF THE REMAINING ONCOMELANIA SNAILS RISING AGAIN IN NUMBER AND REDUCING IN SIZE IN TONGAN, FUJIAN |
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| Li You-song.ON REASONS OF THE REMAINING ONCOMELANIA SNAILS RISING AGAIN IN NUMBER AND REDUCING IN SIZE IN TONGAN, FUJIAN[J].Wuyi Science Journal,1997(1). |
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| Authors: | Li You-song |
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| Abstract: | In the initial site where the Oncomelania snails multiplicated in Tong'an, Fu-jian,a 4650m2 hollow with the snails has been found again in 1993,15 years after last investigation and elimination in the locality. The distribution scope and density of Oncomelania snails have gone up to initial state. |
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| Keywords: | Oncomelania snails Fujian |
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