title: Temporal trends of organochlorine pesticides in prawn (Macrobrachium nipponense) from Lake Kasumigaura, Japan, during 1978-2000.
abstract: Temporal trends of organochlorine pesticides such as beta-hexachlorocyclohexane (beta-HCH), hexachlorobenzene (HCB), and 1,1-dichloro-2,2-bis(p-chlorophenyl)-ethylene (p,p'-DDE), were determined in freshwater prawn (Macrobrachium nipponense) collected from Lake Kasumigaura in 1978 to 2000. The organochlorine pesticides elucidated a 72.4% decrease in beta-HCH, from 42 (1978) to 11.6 ng/g fat (2000); an 89.6% decrease in HCB, from 1.64 (1978) to 0.17 ng/g fat (2000); and an 87.3% decrease in p,p'-DDE, from 97.5 (1978) to 12.4 ng/g fat (1992). After organochlorine pesticide prohibition in 1971, the declining trend of beta-HCH, HCB, and p,p'-DDE concentrations persisting in the prawns could be approximated by exponential equations.
authors.affiliation: Graduate School of Environment and Information Sciences, Yokohama National University, 79-7 Tokiwadai, Hodogaya-ku, Yokohama 240-8501, Japan. d01td901@ynu.ac.jp
authors.lastname: Sunardi
authors.forename: K Senthil
authors.initials: KS
authors.lastname: Kumar
authors.forename: S
authors.initials: S
authors.lastname: Masunaga
authors.forename: N
authors.initials: N
authors.lastname: Iseki
authors.forename: S
authors.initials: S
authors.lastname: Kasuga
authors.forename: J
authors.initials: J
authors.lastname: Nakanishi
mesh_terms: D000818:Animals; D004784:Environmental Monitoring; D006843:Hydrocarbons, Chlorinated; D007306:Insecticides / Q000032:analysis / Q000493:pharmacokinetics*; D007564:Japan; D033541:Palaemonidae / Q000737:chemistry*; D013997:Time Factors; D014018:Tissue Distribution; D014874:Water Pollutants, Chemical / Q000032:analysis / Q000493:pharmacokinetics*
chemical_list: D006843:Hydrocarbons, Chlorinated; D007306:Insecticides; D014874:Water Pollutants, Chemical