Observations on the patterns of embryonic mortality over the laying season of pheasants

Deeming, Charles and Wadland, D. (2001) Observations on the patterns of embryonic mortality over the laying season of pheasants. British Poultry Science, 42 (5). pp. 569-573. ISSN 0007-1668

Full content URL: http://dx.doi.org/10.1080/00071660120088362

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Item Type:Article
Item Status:Live Archive


Embryonic mortality of domestic pheasant (Phasianus colchinus) eggs was recorded for a 10-week laying season for two groups of laying hens maintained under mating ratios of 8:1 and 12:1 (females:males). 2. Mating ratio had no significant effect on embryonic mortality between 1 and 4 or 5 and 20 d but values for these categories doubled as the laying season progressed, both rising to 8% to 9% of fertile eggs. 3. Higher embryonic mortality was observed between 21 and 25 d for the eggs from the 8:1 mating ratio (14.5% of fertile eggs compared with 12.1%) but this was unaffected by week of setting. 4. Reasons for these patterns of embryonic mortality were not clear and further research is needed to determine the factors affecting embryonic mortality in pheasants.

Keywords:Pheasants, Embryonic growth, Embryonic mortality, Mating ratios, mating behavior, Phasianus colchinus
Subjects:C Biological Sciences > C140 Developmental/Reproductive Biology
D Veterinary Sciences, Agriculture and related subjects > D424 Game keeping
C Biological Sciences > C141 Developmental Biology
Divisions:College of Science > School of Life Sciences
ID Code:13334
Deposited On:12 Feb 2014 15:34

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