Presentation on theme: "Breeders, Layers and Hatching Egg Production"— Presentation transcript:
1 Breeders, Layers and Hatching Egg Production R. Keith Bramwell, PhDDepartment of Poultry ScienceUniversity of Arkansas
2 Terms Cock: Male chicken Hen: Female Pullett: Female under six months, non layingCapon: Neutered male chickenBroiler: Raised for meatLayer: Egg productionGestation: Chicken: 21 daysProduction: usually 1 egg per dayComb: Red tissue on top of headWattle: Red tissue hanging under beakBrooding: the raising of baby chicks
3 Chickens – layers or broilers: Broilers – young meat chickens (8 weeks old or less).Roasters – mature chickens used for meat.Capons – castrated males weeks old.There are more than 200 breeds of chickens in the US.Most layers and broilers are cross-breeds.
6 Breeds and Varieties Breed is a type of chicken Leghorn or a Plymouth RockVariety is defined by the variations within the breedLeghorn – single comb vs rose combwhite vs light brownPlymouth rock – White Rock vs Barred Rock
7 Types of Variations Body shape and structure Modern game, Japanese, rumpless
8 Types of Variations Leg and feet variations Size Sound? Silkie, Salmon Favorelle, etcSizeBantam, standardSound?Long crowers!
9 What is Bantam Chicken?A small version of the larger (standard size) breedBantams are almost exclusively for exhibition
10 Types of Variations Feather color Solid coloring Barring, penciled, mottled
11 Types of VariationsFeather typeSilkies, frizzles, long tails
12 Types of VariationsFeather distributionPolish, cochins, naked neck
13 Types of VariationsComb typeSingle, rose, pea, v-shape, etc
14 Comb Types Single Comb Rose Comb Blue-hen, Leghorn, Plymouth Rock, New Hampshire, Rhode Island RedLeghorn, Rhode Island Red
18 Fertilization & Embryo Development Fertilization occurs within 5 minutes after ovulationShell formation takes hours to completeHen’s body temperature o FLaid egg represents 1 days embryonic growth (20, ,000 cells)
19 Day 0 of Incubation: Before Egg is Laid Fertile/infertile determination can be made at layWhile the egg moves from initial fertilization, to shell membrane formation to shell formation in the oviduct, the embryo develops from the early to late cleavage stagesGerminal disc diameter (3-4mm) larger the first few hours after fertilization than at lay