华南农业大学学报2016，Vol.37Issue(6)：59-64,6.DOI:10.7671/j.issn.1001-411X.2016.06.009
巴西龟对福寿螺的直接捕食及间接干扰效应
Predation and indirect interference effects of Trachemys scripta elegans on Pomacea canaliculata
摘要
Abstract
[Objective] To investigate the predatory effect of red-eared slider turtle, Trachemys scripta elegans on golden apple snail,Pomacea canaliculata so as to provide an effective way for resource utiliza-tion of P.canaliculata, and to explore its indirect interference effect on P.canaliculata.[Method]T. scripta elegans and P.canaliculata were put in a set of specially-designed plastic aquarium together, con-trol effects of the turtles on various sizes of snails were determined through regular surveys of the survival and damage of P.canaliculata.Meanwhile, the change of feeding, growth and survival of another group snails outside the cage net under indirect interference effect of T.scripta elegans were investigated, which means that the snails were exposed to the caged predators which had no opportunities to attack them but can respond to alarm signals from conspecific snails predated by turtles.[Result]The snails under the predation of T.scripta elegans for 14 days, only one third of individuals were still alive, among which, the survival rate of small snails (5-15 mm shell height) and medium snails (15-25 mm shell height) de-creased to 0 and 40 percent respectively.Two thirds of large snails (25-35 mm shell height) survived but the injured individuals accounted for 45 percent of the survival.The food intake of the other snails ( me-dium) significantly decreased and growth was restricted under the indirect interference of the turtles, al-though this treatment exhibited less impact on its survival.[Conclusion]T.scripta elegans has strong predatory effect on the invasive P.canaliculata, that also depresses the feeding and growth of surrounding conspecific snails which can perceive the predation risk.These findings would provide new ideas for con-trol of P.canaliculata in its invaded habitat and origin area of turtle ( United States) , and provide refer-ence values for invasion mechanism and population dynamics research of P.canaliculata.关键词
福寿螺/巴西龟/生物防治/捕食效应/干扰效应Key words
Pomacea canaliculata/Trachemys scripta elegans/biological control/predation effect/inter-ference effect分类
农业科技引用本文复制引用
郭靖,张春霞,章家恩,项瑶,江雪..巴西龟对福寿螺的直接捕食及间接干扰效应[J].华南农业大学学报,2016,37(6):59-64,6.基金项目
国家自然科学基金（ U1131006，30770403，30900187）；广东省科技计划项目（2007B020709007，2011B020309009，2012B020310005，2015B090903077）；广东省高等学校高层次人才项目（粤教师函2010［79号］）；广东省引进国（境）外高层次人才智力项目（粤外专［2010］51号）；广东省青年创新人才类项目 （）
