水产学报2017，Vol.41Issue(8)：1264-1275,12.DOI:10.11964/jfc.20160910531
卵形鲳鲹网箱养殖过程主要生长阶段DDTs残留特征及其来源分析
Bioaccumulation and potential sources of DDTs in Trachinotus ovatus during typical cage cultured periods
摘要
Abstract
In the 12th Stockholm Convention, DDTs is one of the nine organic chlorine pesticides, which were proposed to be controlled as persistent organic pollutants (POPs), because of its harmful effects to the environment and the ecosystem. In China, a large amounts of DDTs have been used in the past few years, and it still can be generally detected in the environment although it was banned for using in agriculture in 1983. Many studies showed that fish consumption is a significant route for human exposure to POPs in the world. China is the largest fishery producer in the world with nearly 60 million metric tons in 2015, accounting for 70.0% of the total global fishery production. Recent study showed that residues of the DDTs have been widely identified and reported in some aquaculture fishes in China, especially in Trachinotus ovatus. To determine the bioaccumulation and the potential input sources of DDTs to cage farmed T. ovatus, samples of seed,feeds, adult fish, seawater and the sediments were collected at the beginning, medium and the end of aquaculture practice. DDTs were detected in all samples analyzed, with mean concentrations (± standard deviations) at (3.15±0.42) μg/kg wet weight in seed, (4.49±0.39) μg/kg wet weight in adult fish, (3.95±0.33) μg/kg dry weight in fish feeds, (3.76±0.43) ng/L in cage water and (4.34±1.18) μg/kg dry weight in sediment. The concentration of DDTs in the fish increased during the culture period and significantly higher when harvesting compared to the beginning and the medium, but well below the 0.5 mg/kg wet weight of national standards for food safety level. In addition, only o,ρ'-DDT, ρ,ρ'-DDD and ρ,ρ'-DDT were detected in the sediments, but those three and ρ,ρ'-DDE were detected in the seeds, fish feeds and seawater. o,ρ'-DDT and ρ,ρ'-DDT were the major constituents in all samples, with respectively average percentage at 42.09% and 37.07% in fish, 44.85% and 34.62% in fish feeds, 40.91% and 37.99% in cage water, 33.03% and 51.34% in sediment. Finally, statistical analyses suggested that fish feed, as well as pond water at a lesser degree, may have been the major source of DDTs in cage farmed fish of T. ovatus. In order to ensure the quality and safety of T. ovatus, we should focus on strengthening the control and management of toxic and harmful substances in the feed.关键词
卵形鲳鲹/网箱养殖/DDTs/残留特征/污染源Key words
Trachinotus ovatus/cage culture/DDTs/bioaccumulation/contaminant source分类
农业科技引用本文复制引用
程波,柯常亮,李乐,李刘冬,郑重,邹婉虹,刘巧荣..卵形鲳鲹网箱养殖过程主要生长阶段DDTs残留特征及其来源分析[J].水产学报,2017,41(8):1264-1275,12.基金项目
中央级公益性科研院所基本科研业务费专项(2014005 （）
2016C009) （）
农业部财政专项-水产品质量安全监管无公害农产品(渔业产品)认证专项(2060302) （渔业产品）
水产品未知危害因子识别与已知危害因子安全性评估专项(GJFP2016009) Special Fund ofChinese Central Government for Basic Scientific Research Operations in Commonweal Research Institutes (2014005, 2016C009) （GJFP2016009）
Product Quality and Safety Supervision of Pollution-Free Agricultural (Fishery Products) Certified Special Funds (2060302) （Fishery Products）
Aquatic Product Safety Evaluation of Unknown Risk Factors Identified with Known Risk Factors (GJFP2016009) （GJFP2016009）
