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Corpus Systématique Animale

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Organochlorine pesticides in the tissues of the great barracuda ( Sphyraena barracuda ) (Waldbaum)

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  • Organochlorine Pesticides
  • DDT
  • Barracuda
  • Spawning
  • Ovaries
  • Ciguatera
  • Pestizide
  • Chlorierte Kohlenwasserstoffe
  • Laichzeit
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  • Wm. B. Deichmann 1
  • D. A. Cubit 1
  • W. E. MacDonald 1
  • A. G. Beasley 1
  • 1) Research and Teaching Center of Toxicology, Department of Pharmacology, University of Miami, School of Medicine, USA

The abdominal fat of adult barracuda caught in Florida waters was analyzed for organochlorine pesticides. Of a total of 281 fish, 63 % had 5 to 760 g abdominal fat. The fat of 96 % of these fish contained DDT or one of its isomers or metabolites. Except for the smallest and largest fish, the ratio of “total” DDT in fat to kg body weight remained constant (0.08 to 0.11 mg/kg). During the spawning season, in addition to fat, certain organs and tissues of these fish were also analyzed. The highest pesticide concentrations were found in the fat. Assigning to the concentration of “total” DDT in abdominal fat a value of 10, the rating for the concentration of “total” DDT in the liver becomes approximately 1.1, in the pyloric cecum 1, in flesh 0.7, and for the fully developed gonads 0.5. It seems unlikely that larval barracuda are affected unfavorably by these low concentrations of DDT unless they are exceedingly sensitive to this compound. Since the quantity of abdominal fat and tissue pesticide concentrations were highest at the beginning and lowest during the height and end of the spawning season (and if this should apply to other fish species), then it can be concluded that spot-checking fish tissues for pesticides once or twice a year, more likely than not, provides misleading information with regard to pollution. Tissues and flesh of all barracuda were fed to cats, with no symptoms of ciguatera.

Catégories INIST
  • 1 - sciences appliquees, technologies et medecines
  • 2 - sciences biologiques et medicales
  • 3 - sciences biologiques fondamentales et appliquees. psychologie
  • 4 - ecologie animale, vegetale et microbienne
Catégories Scopus
  • 1 - Physical Sciences ; 2 - Environmental Science ; 3 - Health, Toxicology and Mutagenesis
  • 1 - Life Sciences ; 2 - Pharmacology, Toxicology and Pharmaceutics ; 3 - Toxicology
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