Low Levels of Organochlorine Residues in Combination with Cadmium in Feed at Peripubertal Stage of Domestic Mallard (Anas platyrhynchos Linn.)

Renato SA Vega, Severino S Capitan, Angel L Lambio, Beatriz M Garcia, Henry L Rivero
Vol 14 No 2 (2011), pp. 21-27




Organochlorine pesticide residues (OCPs) and Cadmium (Cd) are present in commercial feed. Beta- Benzenehexachloride (BHC), γ-BHC, γ-Chlordane and Cadmium levels were 150, 7.14, 1.43 and 50-100 ppb, respectively. To determine its effect on growth and reproductive organ development, 252 heads of 12 week-old female mallard were assigned in a 3 x 4 factorial experiment in CRD and replicated three times. Cadmium (Control, 50 and 100ppb) and OCPs (Control, β-BHC, γ-BHC and γ-Chlordane) were the first and second factor, respectively. Growth, hepatic, gonad, oviduct weights and eggs were determined at 12, 16 and 20 weeks.

Cadmium increases and decreases hepatic and oviduct weights, and hastens age of first egg lay (AFEL). Significant interaction of Cd and OCPs on weight gain, and ADG, indicates the interplay of Cd and different OCPs. Compared to the control, the levels of Cd and different OCPs negatively affects weight gain and ADG. Weight gain and ADG were significantly increased by Cadmium, in combination with β-BHC and γ-Chlordane, but were significantly reduced with γ-BHC. Gamma-Benzenehexachloride was the most potent in reducing weight gain significantly. Cadmium significantly downsizes the liver and enhances the weight of oviducts, a manifestation of liver and oviduct activity, reflected by significantly earlier age of first egg lay.


Keywords: Benzenehexachloride, Chlordane and Ducks, Cadmium

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