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Effects of inverting the position of layers eggs during storage on hatchery performance parameters
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2012000400003
CONCLUSIONS
Storing eggs with the small end up is an alternative method to improve hatchability and to reduce egg weight and hatchling weight losses in eggs derived from young and old breeders stored up to 14 days.
http://pubs.aic.ca/doi/pdf/10.4141/cjas69-005
ABSTRACT
When eggs were held in storage, the small-end-up pack position without turning, their hatchability was equal to or better than that of eggs packed small-end-down. When eggs were stored in the small-end-up position for 2 to 4 weeks, it was, not beneficial to turn them daily as had been previously demonstrated to be advantageous for eggs stored small-end-down. Thus, the inconvenience and expense of daily turning can be avoided without loss.Evidence is also provided that hatchability was equally good whether eggs were stored on their sides and turned through 180° daily or stored small-end-up without positional change.
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