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Written Paper

Organochlorine pesticide residues in bird eggs  [1988]

Indraningsih Mariam, M. (Balai Penelitian Veteriner, Bogor (Indonesia)) Milton, R. Marshal, R.B.

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Organochlorine (OC) pesticide are known to persist in the environment and to affect reproduction of birds. To assess the distribution of these contaminants locally, seventy-eight bird eggs were analysed for OC pesticide residues. Ten each of local chicken, improved chicken, duck, quail eggs and 38 wild wading bird eggs were sampled. The domestic bird eggs were obtained from a Bogor market place, while the wild bird eggs were collected from Pulau Seribu. Each egg was separated for extraction with organic solvents, the extract cleaned up by column chromatography and pesticide residues estimated by gas chromatography. Residues of lindane, aldrin, endrin, and metabolites of DDT were commonly found. The level of total DDT metabolites was higher than the concentration of other OC pesticides. Some striking differences in OC residues were noted. Lindane was particularly high in quail eggs. Local chicken eggs were very high in DDT but very low in lindane compared to the other birds. Wild bird eggs showed high level of DDT but low levels in lindane. Improved chicken eggs were high in DDT but low in lindane. Duck eggs were high in DDT but very low in aldrin compared to the other birds. More eggs should be analysed to determine whether the differences observed are real or simply due to small size. Although the OC residue levels observed here are below the WHO recommended limits, our observation indicate that widespread environment contamination has already occurred in Indonesia.