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期 刊 ：植物保护学报 2008年

关键词：福寿螺；温度胁迫；特定生长率；摄食率；存活率；

Keywords:Pomacea canaliculata, temperature stress, special growth rate, feeding rate, survival rate,

摘 要 ：为探讨福寿螺对温度的耐受性及其在我国南方稻区成灾的原因,通过高温(30、33、36、39、42℃)和低温(6、9、12、15℃)胁迫处理,对福寿螺幼螺的特定生长率、摄食率及存活率等指标进行测定。结果表明,超过福寿螺幼螺适宜生长温度的高温胁迫,对其特定生长率、摄食率及存活率的影响差异显著,三者均随温度的升高而降低。福寿螺对高温的耐受性较强,36℃条件下处理21天仍有50%的生存率,42℃下平均生存时间为2.57天。福寿螺不耐低温,在偏离适温的低温下,福寿螺生长缓慢,特定生长率、摄食率及存活率下降,6℃时7天内全部死亡,致死中时间为4天。

Abstract:To explore the temperature tolerance in the apple snail, Pomacea canaliculata and the reasons of its disaster to paddy field in the southern China, the indexes including the special growth rate, feeding rate and survival rate were studied in the juvenile P.canaliculata treated with high temperature (30, 33, 36, 39, 42℃) and low temperature (6, 9, 12, 15℃). The results showed that the heat stress which exceed to the appropriate growth temperature had significant impacts on the special growth rate, feeding rate and survival rate. Each of them decreased with the increasing temperature. P.canaliculata had strong high temperature tolerance, and there was still 50% survival rate at 36℃ for 21 days and the average survival time at 42℃ was 2.57 days. However, P.canaliculata grew slowly at low temperature and the special growth rate, feeding rate and survival rate were all decreased with the decreasing temperature. P.canaliculata was sensitive to low temperature. Exposure at 6℃ for 7 days caused 100% mortality and the median lethal time (LT₅₀) was 4 days.

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