饥饿胁迫下福寿螺的存活和产卵情况及器官组织损伤观察
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国家自然科学基金项目(U1131006、30770403、30900187); 广东省科技计划项目(2007B020709007、2011B020309009); 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)


Influences of starvation stress on survival, spawning and organ-surface impairment of Pomacea canaliculata Lamarck
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    摘要:

    【背景】福寿螺是首批被列入我国外来入侵物种黑名单的生物。近年来,有关福寿螺的研究主要集中在生物学特性、农业危害及防控等方面。其中,关于饥饿胁迫对福寿螺的影响亦有报道,但饥饿胁迫造成其器官组织损伤后的表观结构变化尚未见报道。【方法】本文研究了饥饿胁迫下福寿螺的存活和产卵情况,并通过扫描电镜对福寿螺头部和肝脏表面结构进行观察。【结果】福寿螺在饥饿25 d后存活率达90%以上;饥饿组在25 d内平均每缸产卵量为4.00块,明显低于对照组的24.33块,且福寿螺在饥饿12 d后停止产卵。通过扫描电镜观察可见,头部皱缩并有侵蚀絮状物堆叠,肝脏螺旋结构松散,并伴有深浅不一的裂痕和侵蚀状损伤。【结论与意义】短期饥饿(25 d)对福寿螺存活影响不大,但其产卵量受到明显影响,且头部和肝脏存在明显的外表破损。该结果为研究福寿螺入侵机制及防控策略提供了一定的参考。

    Abstract:

    【Background】Golden apple snail (Pomacea canaliculata) was included in the first list of important invasive alien species in China. Previous studies have focused on the biological characterization, agricultural and integrated controls, and the effects of starvation on the species. Few studies have been conducted on the organ-surface impairment under starvation as a way to control the species. This is the focus of this study. 【Method】The responses of the survival and oviposition of P.canaliculata to starvation stress were observed and impairment of its head and liver tissues were measured by the technique of scanning electron microscope (SEM). 【Result】The results showed that more than 90% of snails could survive without food for 25 days. The number of egg mass of the starvation treatment group was 4 after 25 days, significantly lower than that of the control group (24.33) with food. Snail spawning could not be found when they were in the starvation treatment for over 12 days. Moreover, after the snails were starved for 25 days, the heads were shrinked and stacked with erosed floccule, the livers appeared a loose spiral structure with different shades of cracks and eroded damage. 【Conclusion and significance】Short-time starvation (25 days) has little effect on survival of P.canaliculata, but its spawning is significantly affected, and the tissue surface of their heads and livers have showed obvious injuries. These findings would provide some references for studying invasion mechanism and controlling of P.canaliculata.

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郭靖,章家恩,赵本良,罗明珠,邓智心.饥饿胁迫下福寿螺的存活和产卵情况及器官组织损伤观察[J].生物安全学报中文版,2013,22(4):242-247

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