University:
Sam Houston State University
Course:
BIOL 2413 | General Zoology
Academic year:

2019
Views:

435

Pages:

11
Author:

Clint W.

Reproduction in Poultry Different from mammals • young are not carried in the hens body • develop inside a fertilized egg outside the hens body Process • begins with male placing the sperm into oviduct of the female • male papillae deposits sperm in cloacal wall of female Process • sperm move up the oviduct to the funnel where the egg is fertilized • sperm cells remain in oviduct 23 weeks after mating Process • sperm have full fertilizing ability for about 6 days • after then - ability of sperm to fertilize egg is decreased Sperm viability • 10th day - 50% ability • 19th day - 15% ability Process • after yolk is fertilized it moves through the tract where the rest of the egg is added • egg is laid - embryo grows inside the shell Incubation • keeping eggs at the right temperature and humidity for hatching • hen does this by sitting on the eggs Incubation • commercial hatcheries use mechanical incubators • incubation of chickens is 21 days Incubation • temperature 102 - 103 F. • RH - (relative humidity) 60% for the first 18 days • RH 70% for the last 3 days Incubation • eggs are turned twice daily for the first 15 days • keeps the embryo from sticking to the inside of the shell • Provide a small amount of oxygen