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Biological control of the exotic invasive snail Pomacea canaliculata with the indigenous medicinal leech Whitmania pigra

文献类型： 外文期刊

作者： Guo, Jing 1 ; Zhang, Chunxia 1 ; Xiang, Yao 1 ; Zhang, Jia-En 1 ; Liang, Kaiming 1 ;

作者机构： 1.South China Agr Univ, Coll Nat Resources & Environm, Dept Ecol, Guangzhou, Guangdong, Peoples R China

2.Minist Agr, Key Lab Agroenvironm Trop, Guangzhou, Guangdong, Peoples R China

3.Guangdong Prov Engn Technol Res Ctr Modern Ecoagr, Guangzhou, Guangdong, Peoples R China

4.Guangdong Acad Agr Sci, Rice Res Inst, Guangzhou, Guangdong, Peoples R China

关键词： Predatory potential;apple snail;paddy field;natural enemy;predation risk

期刊名称：BIOCONTROL SCIENCE AND TECHNOLOGY （ 影响因子：1.665； 五年影响因子：1.616 ）

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收录情况： SCI

摘要： The apple snail Pomacea canaliculata has been an invasive species in China for decades and causes enormous losses to agriculture. The predation capability of the leech Whitmania pigra on P. canaliculata was studied for its economic benefit and potential application. In the present study, the leech W. pigra exhibited a strong predatory capacity in controlling P. canaliculata under both laboratory and field conditions, and it showed no bias towards consuming smaller snails during the experiments. More than 80% of the 80 snails (of which half had reached maturity) were preyed upon by 20 developing leeches (2-7 g) in miniature rice fields over a 15-day period, and the number of rice seedlings damaged by P. canaliculata was decreased in the presence of W. pigra. In a separate experiment, 15 developing snails were exposed to caged leeches and conspecific snails for four weeks. The food intake and growth of P. canaliculata were inhibited under the predation risk imposed by W. pigra, but the feeding rate, food conversion efficiency and survival of P. canaliculata were not conspicuously influenced.

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