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|Avian Dis 1995 Jul-Sep;39(3):652-7
Apparent selenium toxicity in emus (Dromaius
Kinder LL, Angel CR, Anthony NB.
Department of Poultry Science, University of Arkansas, Fayetteville 72701,
A commercial emu breeder experienced high embryonic mortality during the
1992-93 breeding season, apparently associated with high levels of selenium.
The feed was a mixture of catfish food supplemented with a vitamin E and
selenium premix. The mixture contained an average of 1.4 ppm selenium.
Selenium analysis was conducted on eggs from several hens laid during the
period of vitamin and selenium supplementation and after the supplementation
was withdrawn. Initial egg selenium levels ranged from 1.2 to 7.1 ppm, with
a mean value of 4.2 +/- 0.7 ppm (n = 9). Eggs collected over a 2-month
period post-withdrawal contained 2.1 +/- 0.2 ppm selenium (n = 6). Eggs
sampled between 2 and 3 months post-withdrawal contained 1.1 +/- 0.1 ppm
selenium (n = 4). Egg selenium levels decreased significantly over the
3-month period (P < 0.05) for each individual sample.