双酚AF对大型溞生殖、生长等生态行为的影响

Influences of bisphenol AF on the reproduction and growth of Daphnia magna

为了明确双酚AF(BPAF)对水生生物行为的影响,考察了BPAF对大型溞的急性毒性和慢性毒性(生殖、生长、发育、生理等)影响.结果显示,BPAF对大型溞的24h和48h半致死浓度(LC50)分别为9.70mg/L和5.02mg/L.根据化学品分类和标签规范,BPAF属于毒性Ⅱ级.BPAF对大型溞生殖、生长、发育和生理的毒性影响结果表明,高浓度BPAF(100μg/L)导致大型溞性成熟时间明显延迟,并显著降低了大型溞产卵频次、产卵总数等生殖行为,且对大型溞的生长、发育产生显著抑制现象,同时造成种群繁衍能力显著受损.本文旨在为BPAF对水生生物的生态行为影响提供理论依据.

To assess the toxicological effects of Bisphenol AF(BPAF)on aquatic organisms,the acute toxicity and chronic effects with regards to reproduction,growth and development of Daphnia magna were investigated.The results showed that the LC50 for the 24h and 48h were 9.70mg/L and 5.02mg/L,respectively.BPAF belongs to toxicity class II,according to rules for classification and labelling of chemicals.Clear delay in the sexual maturity time for Daphnia magna exposed to 100μg/L of BPAF was found.Again,Significant reduction in the total number of eggs per female,the number of brood per female,intrinsic rate of natural increase,the average body length,heart rates and thoracic limbs activity were also found in the Daphnia magna exposed to high concentration of BPAF(100μg/L).These results provided theoretical basis for acknowledgement of the environmental behaviors of BPAF on aquatic organisms.