Post on 27-May-2020
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Follicle
InfundibulumWhere fertilization happens: ovule releases10-15min Magnum
Albumin secretion2-3h
IsthmusInternal and external Shell membranes are formed. 1-2h
UterusShell formation, adding liquid to the egg (enlargement) albumin layering20h
Vagina/ CloacaHelps to expel the egg warehouse1m
Oviduct :25 – 27 Inches63-68 cm
Pander Nucleolus
Blastodisc
Shell/ Shell Membrane
Chalazae
Latebra
Latebra neckClear Yolk
Dark Yolk
Albumin outer thick layer
Outer thick layer albumin
Albumin inner thin layer
Albumin outer thin layer
Chalazae
Air cell
102°F65-85°F
Outer Shell Membrane
Inner Shell Membrane
Albumin
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Yolk Albumen shell
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Basic structural layers description:
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Basic structural layers description:
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shell weight x100 / whole egg weight
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Visual check defects
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SCIENTIFIC
VALUES/RESULTSThe Effect of Egg Shell Quality on Hatchability and Embryonic Mortality G. R. McDANIEL, et al 1978
(36weeks) (52weeks) (64 weeks)
Higher specific gravity result:• Better hatch %• Less embryo
mortality (1-7d)
SCIENTIFIC
VALUES/RESULTSThe influence of eggshell crack types on hatchability and chick qualityM. M. Khabisi, et al. 2011
Hairline cracks result: • Less egg weight at
transfer• More Egg weight loss %• More Incubation Hours• Less hatchability• Less fertility • Less Hatch of fertile
SCIENTIFIC
VALUES/RESULTSThe influence of eggshell crack types on hatchability and chick qualityM. M. Khabisi, et al. 2011
Hairline cracks result: • Less yolk-free body
mass
Hairline cracks and star cracks result:• Less liver weight • Less breast weight
→
• https://hatchingchicks.com.au• C. Bowles : www.meadowfeeds.co.za• www.backyardchickens.com• http://voice.gardenbird.co.uk• Bennett, CD, 1992- influence of shell thicknes on hatchability in commercial b&r breeder flocks. J. Appl. Poult Res.
1:61-65.• McKctn, W.D, 1983. Using specific gravity for eggshell quality control. wltural Cooperative Eaension, University of
California, San Bernardino, ck• NEW ALTERNATIVES FOR IMPROVING EGG SHELL STABILITY THROUGH BREEDING Christian Cordts, Dr Matthias
Schmutz, Prof Dr Rudolf Preisinger (Lohmann, Cuxhaven, Germany)• Cobb hatchery management guide• Aviagen : what is a good quality hatching egg• Measuring hatching eggshell quality - K. Bramwell et al. , 2009