<?xml version='1.0' encoding='utf-8'?>
<oai_dc:dc xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:oai_dc="http://www.openarchives.org/OAI/2.0/oai_dc/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.openarchives.org/OAI/2.0/oai_dc/ http://www.openarchives.org/OAI/2.0/oai_dc.xsd">
  <dc:contributor>D. J. Hoffman</dc:contributor>
  <dc:creator>G. H. Heinz</dc:creator>
  <dc:date>1996</dc:date>
  <dc:description>&lt;p&gt;&lt;span&gt;The toxicities of seleno-&lt;/span&gt;&lt;span class="small-caps"&gt;l&lt;/span&gt;&lt;span&gt;-methionine, seleno-&lt;/span&gt;&lt;span class="small-caps"&gt;dl&lt;/span&gt;&lt;span&gt;-methionine, and selenized yeast were compared. Ten pairs of mallards were fed a control diet and 15 pairs were fed diets containing 10 ppm selenium as seleno-&lt;/span&gt;&lt;span class="small-caps"&gt;dl&lt;/span&gt;&lt;span&gt;-methionine, seleno-&lt;/span&gt;&lt;span class="small-caps"&gt;l&lt;/span&gt;&lt;span&gt;-methionine, or selenized yeast. Hatching of fertile eggs was significantly lower for females fed 10 ppm selenium as seleno-&lt;/span&gt;&lt;span class="small-caps"&gt;dl&lt;/span&gt;&lt;span&gt;-methionine (7.6%) and seleno-&lt;/span&gt;&lt;span class="small-caps"&gt;l&lt;/span&gt;&lt;span&gt;-methionine (6.4%) than for controls (41.3%). Survival of ducklings was lower when their parents had been fed 10 ppm selenium as seleno-&lt;/span&gt;&lt;span class="small-caps"&gt;l&lt;/span&gt;&lt;span&gt;-methionine (20.0%) than for controls (98.4%). The number of 6-day-old ducklings produced per female was significantly lower for mallards fed 10 ppm selenium as seleno-&lt;/span&gt;&lt;span class="small-caps"&gt;dl&lt;/span&gt;&lt;span&gt;-methionine (0.47) or selenized yeast (2.67) than for controls (6.10), and was significantly lower for mallards fed seleno-&lt;/span&gt;&lt;span class="small-caps"&gt;l&lt;/span&gt;&lt;span&gt;-methionine (0.13) than for mallards fed selenized yeast. The eighth eggs of females fed the&amp;nbsp;&lt;/span&gt;&lt;span class="small-caps"&gt;dl&lt;/span&gt;&lt;span&gt;&amp;nbsp;or&amp;nbsp;&lt;/span&gt;&lt;span class="small-caps"&gt;l&lt;/span&gt;&lt;span&gt;&amp;nbsp;forms of selenomethionine contained means of 9.2 and 8.9 ppm selenium, wet weight; these means were higher than the mean (6.6 ppm) for females fed selenized yeast. Among embryos that died at 7 days of age or older, the percentage of embryos that were deformed was 1.3% for controls, 24.6% for seleno-&lt;/span&gt;&lt;span class="small-caps"&gt;dl&lt;/span&gt;&lt;span&gt;-methionine, 28.2% for seleno-&lt;/span&gt;&lt;span class="small-caps"&gt;l&lt;/span&gt;&lt;span&gt;-methionine, and 11.0% for selenized yeast. The results suggested that seleno-&lt;/span&gt;&lt;span class="small-caps"&gt;dl&lt;/span&gt;&lt;span&gt;-methionine and seleno-&lt;/span&gt;&lt;span class="small-caps"&gt;l&lt;/span&gt;&lt;span&gt;-methionine were of similar toxicity and were both more toxic than selenium from selenized yeast.&lt;/span&gt;&lt;/p&gt;</dc:description>
  <dc:format>application/pdf</dc:format>
  <dc:identifier>10.1016/0269-7491(95)00053-4</dc:identifier>
  <dc:language>en</dc:language>
  <dc:publisher>Elsevier</dc:publisher>
  <dc:title>Comparison of the effects of seleno-Lmethionine, seleno-DL-methionine, and selenized yeast on reproduction of mallards</dc:title>
  <dc:type>article</dc:type>
</oai_dc:dc>