Photorefractoriness and sexual response in aging partridge kept under constant long- and short-day photoperiods.


The duration of post-juvenile refractoriness was studied in Red-legged partridge kept under a long constant 16-hr photoperiod from hatch to 55 months of age. A second group of partridge was kept under a short constant 8-hr photoperiod from hatch to 38 months of age. Body weight was measured bimonthly, and daily egg production kept on birds reaching sexual… (More)


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