Further Evidence for an Unidentified Hatchability Factor in Condensed Fish Solubles

Abstract

OLCESE et al. (1950), Olcese and Couch (1950), and Peeler et al. (1951), have presented evidence for an unidentified dietary essential required by the hen for normal hatchability of fertile eggs in addition to other known nutrients, including vitamin B12. Couch, Olcese, Sanders and Halick (1950) have reported the presence of this unidentified factor in liver fraction “L,” and to a lesser extent, in an APF concentrate fed alone or in combination with dried whey. A sample of fish solubles, however, failed to improve hatchability under their experimental conditions. On the other hand, Stephenson and Clower (1952) have recently obtained results which indicate that condensed fish solubles contain an unidentified hatchability factor. The data reported herein provide additional evidence for the presence of such an unidentified factor in condensed fish solubles. EXPERIMENTALIn an experiment originally designed to accurately determine the vitamin B12 requirement of New Hampshire pullets, approximately 200 …