poultry reproduction
Text z Príbehu
- HI! Today I'm going to explain the poultry reproduction.
- Lets start with puberty and breeding in the avian species.
- HEN AND COCKEREL
- Hen reaches puberty and starts to produce eggs at 4-5 months of age. Hens are not bred to produce young until they reach 5-6 months of age.
- Cockerel is capable of insemination at 4-5 months of age, but, like the hen, is not used for breeding until 6 months of age to insure viable sperm.
- Next is....
- Hens do not have an estrus cycle, and will lay an egg nearly every day. In contrast with mammalian species in which both ovaries are functional and either ovulate simultaneously, or alternately, 99% of hens have only one functional ovary.
- Next is....
- Reproductive Physiology of the Hen
- INFUNDIBULUM - yolk with attached ovum is snatched up by the infundibulum. It is at this point in the reproductive tract that the ovum is fertilized if the hen has been mated with a cockerel. Spermatozoa from the cockerel are stored in "sperm nests" located within the infundibulum and are capable of fertilizing ova for up to 30 days after mating.
- Next is....
- OVARY - containing immature and mature follicles. The mature follicles consist of the egg "yolk" and the unfertilized ovum.MAGNUM - while traveling through this part of the oviduct, the albumin or egg white is formed.
- VAGINA - the egg travels through the vagina into the cloaca, from which it is "laid."CLOACA - this is the common external opening from which the contents of the urinary tract (urates), the intestinal tract (feces) and the reproductive tract (eggs) exit the hen.
- Next is....
- ISTHMUS - the tough outer membrane located just beneath the egg shell is formed in this part of the oviduct.UTERUS - also referred to as the "shell gland", this is where the egg shell is formed. Most of the transit time from ovulation until the egg is laid is spent in the uterus.
- GENERAL INFORMATION
- In addition to differences in the reproductive physiology, the development of avianoffspring differs significantly from mammals in a number of other ways.
- A hen is capable of producing an egg every 25 hours. It is capable of laying approximately 270 eggs per year. The embryo in a cracked fertile egg will not develop.
- And finally...
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