Nom du corpus

Corpus Systématique Animale

Titre du document

Organochlorine and mercury residues in fish from Lake Simcoe, Ontario 1970–76

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Springer (journals)
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Type de document
Mots-clés d'auteur
  • Persistent pesticide
  • Industrial contaminants
  • Restrictions
  • Bioaccumulation
  • Fish Species-Trophic levels
  • Lake system
Nom du fichier dans la ressource
  • Richard Frank 1
  • Micheline Holdrinet Van Hove Holdrinet 1
  • Ronald L. Desjardine 2
  • Douglas P. Dodge 3
  • 1) Provincial Pesticide Residue Testing Laboratory, Ontario Ministry of Agriculture and Food, N1G 2Wl, Guelph, Ontario, Canada
  • 2) Lake Simcoe Fisheries Assessment Unit, Ontario Ministry of Natural Resources, Sibbald Point, Sutton, Ontario, Canada
  • 3) Fisheries Branch, Ontario Ministry of Natural Resources, Toronto, Ontario, Canada

Synopsis: Lake Simcoe located in the central Ontario plain has four major streams draining the watershed. Persistent organochlorine insecticides were used in the basin for mosquito control and agricultural production until restricted. Methyl mercury compounds have been phased out and a voluntary restriction occurred for PCB. Ten species of fish were collected between 1970 and 1976 for organochlorine and mercury analysis. ?DDT residues significantly declined between 1970 and 1975–76 in all species except small Stizostedion vitreum vitreum and large Salvelinus namaycush. Eggs taken 1975–76 from small S. namaycush had ?DDT residues below the critical level reported for the production of viable offspring, but this was not so for large members. HEOD residues between 1970 and 1975–76 significantly declined in five species, showed no change in two, whereas in two species the Larger members of one had Lower residues and the smaller members of the other showed no change. PCB residues all species except the larger Perca flavescens. Chlordane and heptachlor-epoxide were identified in S. namaycush for the first time in 1975–76. Mercury residues showed no change between 1970 and 1975–76 in five species, it declined in two species and increased in small S. v. vitreum. Correlations existed between Levels of organic contaminant and Lipid content of fish especially in the immediate post period of their use. Where the increasing Lipid content was associated with an increasing trophic level a preypredator relationship existed for contaminant accumulations. However, where Lipid contents were Low, no correlation appeared to exist in the prey-predator.

Catégories Science-Metrix
  • 1 - applied sciences
  • 2 - agriculture, fisheries & forestry
  • 3 - fisheries
Catégories INIST
  • 1 - sciences appliquees, technologies et medecines
  • 2 - sciences biologiques et medicales
  • 3 - sciences biologiques fondamentales et appliquees. psychologie
  • 4 - productions animales
Catégories Scopus
  • 1 - Life Sciences ; 2 - Agricultural and Biological Sciences ; 3 - Aquatic Science
  • 1 - Life Sciences ; 2 - Agricultural and Biological Sciences ; 3 - Ecology, Evolution, Behavior and Systematics
Catégories WoS
  • 1 - science ; 2 - marine & freshwater biology
  • 1 - science ; 2 - ecology
Identifiant ISTEX

Environmental Biology of Fishes

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