Abstract
Summary
Unfertilized Beltsville Small White turkey eggs produced by the same hens during their first and second laying year were incubated for 9-10 days and subsequently examined for parthenogenesis. Involved were 163 hens and more than 13,000 unfertilized eggs. On the average, partheno-genetic development encountered in eggs of younger birds yielded a higher percentage of embryos. It was likewise found that, on the average, embryos in eggs of younger birds survived longer within the shell than did those of older birds.
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