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3 Fall Lambing 10 25 06
- 7. Anovulatory Breeding Pregnancy Lambing Anovulatory Seasonal Breeding Cycle in Sheep Winter Fall Summer Summer Spring Decreasing Day Length Increasing Day Length Geisert, 1999
- 9. Day Length Melatonin Production COMMUNCIATION VIA HORMONES BRAIN REPRODUCTIVE TRACT Decreasing Daylight STIMUALTION
- 10. Day Length Melatonin Production COMMUNCIATION VIA HORMONES BRAIN REPRODUCTIVE TRACT Decreasing Daylight STIMUALTION
- 11. Day Length Melatonin Production COMMUNCIATION VIA HORMONES BRAIN REPRODUCTIVE TRACT Increasing Daylight SUPPRESSION
- 12. Day Length Melatonin Production COMMUNCIATION VIA HORMONES BRAIN REPRODUCTIVE TRACT Increasing Daylight SUPPRESSION
- 14. How does seasonality effect the supply of lamb? Jan Feb Mar Apr May Jun Jul Aug Sep Oct U.S. Monthly Lamb Slaughter in 2004 and 2005 Source: USDA/NASS Nov Dec 175 200 225 250 275 1,000 head Sheep and lamb slaughter Dollars per cwt 95 100 105 110 90 Slaughter lamb prices
- 20. What are the benefits of overcoming seasonality? Jan Feb Mar Apr May Jun Jul Aug Sep Oct U.S. Monthly Lamb Slaughter in 2004 and 2005 Source: USDA/NASS Nov Dec 175 200 225 250 275 1,000 head Sheep and lamb slaughter Dollars per cwt 95 100 105 110 90 Slaughter lamb prices
- 22. What are the benefits of overcoming seasonality? Jan Feb Mar Apr May Jun Jul Aug Sep Oct Source: USDA/NASS Nov Dec 1 2 3 4 5 Relative no. of head Sheep and lamb slaughter Potential North Dakota Monthly Lamb Slaughter Relative dollars per cwt 2 3 4 5 1 Slaughter lamb prices
- 24. How can we overcome seasonality in ewes? Normal percentage of ewes in heat per month
- 32. Endocrine Control of Estrous Cycle in the Ewe
- 33. Endocrine Control of Estrous Cycle in the Ewe
- 37. Progestins: CIDR Day of estrous cycle 1 3 6 9 12 15 18 21 Days -12 -6 0 2 Insert CIDR on day -12 Remove CIDR on day 0 Heat in 1-2 days
- 39. Progestins: MGA Day of estrous cycle 1 3 6 9 12 15 18 21 Days -12 -6 0 2 Start feeding MGA on day -12 Stop feeding MGA on day 0 Heat in 1-2 days
- 40. Endocrine Control of Estrous Cycle in the Ewe
- 41. Endocrine Control of Estrous Cycle in the Ewe
- 45. Gonadotropin: PG600 (with CIDRs) Day of estrous cycle 1 3 6 9 12 15 18 21 Days -12 -6 0 2 Insert CIDR on day -12 Remove CIDR on day 0 Heat in 1-2 days Administer shot of PG600 on day 0
- 48. Questions?