Effects of Bisphenol A on the Survival and Metabolic Activities of Biomphalaria glabrata
[Objective]This study aims to investigate the survival status of Biomphalaria glabrata in water polluted with bisphenol A(BPA)to explore the colonization potential of this species under similar pollution conditions.[Method]Using the"static water respirometer"method,the mortality,oxygen con-sumption rate,and ammonia excretion rate of Biomphalaria glabrata of different sizes were measured un-der five concentrations of BPA(0,0.05,0.10,0.20,and 0.40 mg/L).In addition,the relationship between the dry weight of the soft body and the oxygen consumption rate(OCR)and ammonia excretion rate(AER)of Biomphalaria glabrata under BPA exposure was analyzed in depth.[Results]The dry weight of the soft body of Biomphalaria glabrata showed an opposite trend with its oxygen consumption rate and ammonia excretion rate.Snails with smaller dry weights of the soft body had higher OCR and AER than those with larger dry weights of the soft body.In the control group,the OCR and AER of small snails(snail width<8 mm)were 1.368 and 83.372,respectively.While those of large snails(snail width≥8 mm)were 0.743 and 33.701,respectively.As the concentration of BPA increased,the OCR and AER of Biomphalaria glabrata of different sizes both showed a decreasing trend,and the decrease was more significant for small snails(P<0.05).The higher the concentration of BPA,the higher the mortality of Biomphalaria glabrata.When the concentration of BPA was 0.40 mg/L,the mortality of small snails reached 31.3%,and the mortality of large snails reached 25.6%,with a significant differ-ence in mortality between small and large snails(P<0.05).[Conclusion]This study shows that water containing BPA can significantly inhibit the survival and metabolic activities of Biomphalaria glabrata,and this inhibitory effect is closely related to the size of the individuals.As the concentration of pollutants increases,the physiological functions of small snails are more severely inhibited,resulting in a higher mortality rate.These results have important guiding significance for assessing the invasion potential of Bi-omphalaria glabrata in polluted environments and formulating relevant management strategies.
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