AVS 101 1st Edition Lecture 13Avian Reproduction & Dairy ManagementAvian Reproduction In domesticated birds only left ovary & oviduct mature In wild birds only right ovary & oviduct mature Ovum - releases (yolk) from its sack Infundibulum catches egg 15 minutes Magnum – thick albumen added 3 hours Chalazae – shock absorber Keeps egg centered Isthmus – shell membrane added 1 ¼ hours Uterus – shell gland 16-20 hours Pigment added No difference in egg by color Bloom – waxy covering outside shell Vagina – not an organ of copulation 15 minutes Cloaca – egg rotates 180 degrees Vent Approximately 20-25 hours to lay egg 250 eggs / year FSH & light influence egg layingIncubation period Any deviation will result in a dead chick Chicken – 21 days Turkey – 28 daysDairy Industry In trouble Heavily subsidized Family operation à corporate owned 150 cows à 3,000 cows 2 x / day milking à around-the-clock milking Respected product – “nature’s most perfect food”Milk Milk is sold by CWT (hundred weight) Farmer gets $14 per CWT 1 gallon of milk = 8 pounds 1 CWT = 12.5 gallons of milk You pay $3/gallon à $38/CWT$14 farmer’s share $24/CWT Packaging, processing & distributionFactors Influencing Dairying Market – proximity Feed – cost the most Labor – long hours; short supply Climate – heating/cooling animals Federal marketing order-fixes price of
View Full Document
Unlocking...