取食加Cd^(2+)食物后拟水狼蛛发育历期、耐饥力和体内Cd(2+)含量的变化  被引量:4

Changes in developmental duration,starvation tolerance and cadmium content in Pirata subpiraticus(Araneae:Lycosidae) fed on diets with cadmium

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作  者:张征田[1] 张虎成[2] 王庆林[1] 庞振凌[1] 梁子安[1] 夏敏[1] 杜瑞卿[1] 

机构地区:[1]南阳师范学院生命科学与技术学院,河南南阳473061 [2]北京电子科技职业学院生物系,北京100029

出  处:《昆虫学报》2011年第9期997-1002,共6页Acta Entomologica Sinica

基  金:河南省基础与前沿技术研究项目(112300410223);河南省重点学科项目(豫教高2008169)

摘  要:为明确食物中重金属离子在蜘蛛体内的传递、生物放大及对其生长历期和耐饥力的影响,采用原子吸收光谱法检测了拟水狼蛛Pirata subpiraticus取食加Cd2+食物后体内Cd2+含量变化情况,测定了Cd2+对其发育历期和耐饥力的间接影响。结果表明:食物中的Cd2+能够通过食物链进行传递并在拟水狼蛛体内积累,积累量随拟水狼蛛龄期的增长而增加,积累量与消耗的黑腹果蝇Drosophila melanogaster数量极显著正相关(P<0.01),与消耗食物中Cd2+含量显著正相关(P<0.05);对食物中Cd2+的吸收率为65.4%,生物放大因子为1.8。成蛛改喂无Cd2+的黑腹果蝇后在观察的4周内体内Cd2+含量变化不明显。食物中的Cd2+能导致拟水狼蛛的发育历期显著延长、耐饥力显著降低。研究结果可为进一步研究环境中Cd2+沿土壤-昆虫-天敌传递、放大和生理耐受等提供理论依据。In order to explore the effects of heavy metals on transfer,biomagnification and developmental duration in spiders,the changes of cadmium content in various instars of Pirata subpiraticus fed with Drosophila melanogaster flies reared on artificial diets were detected by atomic absorptions spectrometry and indirect effects of cadmium on its developmental duration were measured.The results showed that excessive cadmium in food could be transferred by food chain and accumulated in P.subpiraticus and the accumulation level increased with instar duration extended,which was significantly positively related with the number of fruit flies ingested and the cadmium content in food,respectively.It was estimated that 65.4% of the Cd2+ was assimilated by the spiders and the biomagnification factor was approximately 1.8.Cd2+ content in P.subpiraticus had no significant change in the observed 4 weeks of feeding with uncontaminated flies.Cadmium in food significantly led to lengthening of developmental duration and reducing of starvation tolerance in P.subpiraticus.The results might provide adequate basic theory on Cd2+ transmission,biomagnification and physiological tolerance along the soil-insects-predators.

关 键 词:拟水狼蛛 食物链 重金属  积累 排泄 生物放大 发育历期 

分 类 号:Q968[生物学—昆虫学]

 

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