| Summary |
Experiments were conduct] to investigat Pb concentrations in eggs from laying lsaiya ducks (Anas platyrhynchc6 var. omestica) dcsed daily via gelatin capcule with different amount of Pb. Irs experiment 1, the doses of lead were erprivalent to 0,10, and 20 rag Ph/kg b3dy weight for 3 months. No clinical syndromes involving Pb intoxication was found throughout the experiment period. The two levels of Pb consisttly result] in increases inthe Pb content of blood. Lead residues in yolk and egg shell from lead-dosed ducks were significantly higher than from controls.
Ufl11fl217 However, Pb in albumens were generally low and were not influenced by Pb treatment. hexperimentthedcesofleadwerererluceJto0,4, Gand8mgikg&dy weight for 1 month. Lead content of whole Ucxid from lead treat] ducks were signifIcantly higher than those of controls. Lead concetrations in yolk of2 rag/kg group and control were not different significantly, whereas higher levels of Pb (4,6,8 mgikg) increased the Pb concentrations in yolk. Lead concentrations in albumen and eggshell were not affatta1byPbfeeriingatthedoseof 8 rag/kgandkelow.
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