本研究分析了水产养殖和垂钓中饲料、窝料、饵料、水样及水产品中地西泮(Diazepam,DZP)的存在情况,并建立了在线净化-液相色谱串联质谱定量检测方法。结果表明DZP含量在0.5~20.0μg/L间线性良好,相关系数(r^(2))均大于0.999;饵料、水样...本研究分析了水产养殖和垂钓中饲料、窝料、饵料、水样及水产品中地西泮(Diazepam,DZP)的存在情况,并建立了在线净化-液相色谱串联质谱定量检测方法。结果表明DZP含量在0.5~20.0μg/L间线性良好,相关系数(r^(2))均大于0.999;饵料、水样和水产品中定量限(Limit of quantitation,LOQ)分别为1.0μg/kg、0.5μg/L、1.0μg/kg;3种基质中1.0μg/kg、5.0μg/kg和10.0μg/kg 3个浓度水平的加标回收率分别为85.2%~106.5%、82.3%~108.0%、90.7%~116.0%,相对标准偏差(Relative standard deviation,RSD)分别为3.6%~5.1%、2.7%~4.3%、2.1%~2.6%。通过调查发现,7份养殖用饲料中均未检出DZP;28份垂钓中使用的窝料、饵料检出率达66.7%,浓度为2.2~213090.0μg/kg;10份诱鱼剂中均检出DZP,检出率达100%,浓度为637000.0~3471000.0μg/kg;27份水样中DZP检出率达85.2%,浓度为0.4~9.8μg/L和71份淡水鱼中DZP的检出率为54.9%,浓度为0.5~21.8μg/kg。由此可见窝料、饵料及诱鱼剂的使用可能是水体和水产品中DZP频繁检出的重要原因之一,对消费者食用安全和水产养殖行业的健康发展均具有潜在风险,亟需加强DZP监管和监测。展开更多
In this study, we examined the use of artificial nest boxes by Siberian flying squirrels (Pteromys volans) in three coniferous and mixed forests in Gangwon Province, South Korea. Six hundred and twelve boxes with diff...In this study, we examined the use of artificial nest boxes by Siberian flying squirrels (Pteromys volans) in three coniferous and mixed forests in Gangwon Province, South Korea. Six hundred and twelve boxes with different sized entry holes (ranging from 3 to 7 cm in diameter) were placed in the forests between 2004 and 2009. Pteromys volans used nine boxes in the coniferous forests and two boxes in the mixed forests. The squirrels only used boxes with entrance holes measuring 3.5, 4, and 5 cm in diameter, showing a strong and moderate preference for boxes with 5 and 4-cm holes, respectively, and a strong avoidance for boxes with 3- and 7-cm holes. Therefore, we suggest placing artificial nest boxes with entrance holes 5 cm in diameter to encourage breeding activity. Most nests made in the artificial boxes were composed of fibrous materials from woody vines. We recommend placing artificial nest boxes with holes of 5-cm diameter in coniferous forests, which support dense populations of P. volans, to survey whether this approach would positively affect the breeding habits and population maintenance of this species.展开更多
文摘本研究分析了水产养殖和垂钓中饲料、窝料、饵料、水样及水产品中地西泮(Diazepam,DZP)的存在情况,并建立了在线净化-液相色谱串联质谱定量检测方法。结果表明DZP含量在0.5~20.0μg/L间线性良好,相关系数(r^(2))均大于0.999;饵料、水样和水产品中定量限(Limit of quantitation,LOQ)分别为1.0μg/kg、0.5μg/L、1.0μg/kg;3种基质中1.0μg/kg、5.0μg/kg和10.0μg/kg 3个浓度水平的加标回收率分别为85.2%~106.5%、82.3%~108.0%、90.7%~116.0%,相对标准偏差(Relative standard deviation,RSD)分别为3.6%~5.1%、2.7%~4.3%、2.1%~2.6%。通过调查发现,7份养殖用饲料中均未检出DZP;28份垂钓中使用的窝料、饵料检出率达66.7%,浓度为2.2~213090.0μg/kg;10份诱鱼剂中均检出DZP,检出率达100%,浓度为637000.0~3471000.0μg/kg;27份水样中DZP检出率达85.2%,浓度为0.4~9.8μg/L和71份淡水鱼中DZP的检出率为54.9%,浓度为0.5~21.8μg/kg。由此可见窝料、饵料及诱鱼剂的使用可能是水体和水产品中DZP频繁检出的重要原因之一,对消费者食用安全和水产养殖行业的健康发展均具有潜在风险,亟需加强DZP监管和监测。
基金supported by LG Evergreen Foundation,Republic of Korea
文摘In this study, we examined the use of artificial nest boxes by Siberian flying squirrels (Pteromys volans) in three coniferous and mixed forests in Gangwon Province, South Korea. Six hundred and twelve boxes with different sized entry holes (ranging from 3 to 7 cm in diameter) were placed in the forests between 2004 and 2009. Pteromys volans used nine boxes in the coniferous forests and two boxes in the mixed forests. The squirrels only used boxes with entrance holes measuring 3.5, 4, and 5 cm in diameter, showing a strong and moderate preference for boxes with 5 and 4-cm holes, respectively, and a strong avoidance for boxes with 3- and 7-cm holes. Therefore, we suggest placing artificial nest boxes with entrance holes 5 cm in diameter to encourage breeding activity. Most nests made in the artificial boxes were composed of fibrous materials from woody vines. We recommend placing artificial nest boxes with holes of 5-cm diameter in coniferous forests, which support dense populations of P. volans, to survey whether this approach would positively affect the breeding habits and population maintenance of this species.
