practical developments for reproductive management of beef...
TRANSCRIPT
Practical Developments for Reproductive Management of Beef
Cows
G. Cliff Lamb, V. R. G. Mercadante, G. H. L. Marquezini, D. D. Henry, F. M. Ciriaco, N. DiLorenzo
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10
Uni
ts o
f sem
en, x
106
Year
USABrazil
% increase from 1995 to 2010 28%
238%
Semen Sales in USA and Brazil from 1995 to 2011
(NAAB and ASBIA, 2011)
Estrous Synchronization and TAI in Beef Cattle
http://beefrepro.unl.edu/
Economics of implementing TAI program
(Rodgers et al., 2013)
Control
CIDR Natural mating GnRH PGF
TAI + GnRH
TAI
Natural mating
Impact of Fixed-Time AI on Calving and Weaning
0
10
20
30
40
50
60
70
80
90
100
0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100
Cum
ulat
ive
perc
enta
ge o
f co
ws
calv
ing
Days of calving season
TAI Control
Impact of Fixed-Time AI on Calving and Weaning
(Rodgers et al., 2013)
Impact of Fixed-Time AI on Calving Distribution
21 23
16 18
5 3 3
2
7
18
29
25
8
2 3 2
0
10
20
30
40
1-10 11-20 21-30 31-40 41-50 51-60 61-70 >70
%
Days of the calving season
TAIControl
44% vs. 25%
(Rodgers et al., 2013)
Treatment
Item Control TAI
No. of cows 615 582
Weaning rate, % 78a 84b
Weaning weight, lb 388 ± 8a 425 ± 8b ab Means within row differ (P < 0.01)
Impact of Fixed-Time AI on Calving and Weaning
37 lb
(Rodgers et al., 2013)
Bull price $3,250
Salvage bull price $3.63/lb
Bull grazing, feed, maintenance $365/year
Interest 7%
Steer calf selling price (550 lb) $5.85/lb
Semen $13.00
Reduction in bull/cow ratio 1/17 to 1/34
Model Assumptions (2007)
$55
$19
$72
$139
-$6
$36 $30
$47 $49
-$20
$0
$20
$40
$60
$80
$100
$120
$140
$160
1 2 3 4 5 6 7 8 Overall
Net
gai
n or
loss
Location
Gain or Loss by Location
(Rodgers et al., 2013)
Increased returns $47.09
Decreased Costs $35.23
Increased Costs $33.18
Gain $49.14
Summary of Outputs
Change in value based on herd sire costs
Bull Value
Item $2,500 $3,500 $4,500
Increased returns (increased value of AI calves)
$58.33 $58.33 $58.33
Decreased costs (decreased costs of clean-up bulls)
$29.55 $39.29 $49.04
Decreased returns (Attributed to fewer clean-up bulls included in decreased costs calculation)
$0.00 $0.00 $0.00
Increased costs (additional labor, semen, AI supplies, etc.)
$46.10 $46.10 $46.10
Gain per cow exposed to AI $41.78 $51.52 $61.27
Acknowledgements People
Dr. John Arthington Dr. Reinaldo Cooke
Dr. Carl Dahlen Dr. Alfredo DiCostanzo Dr. Nicolas DiLorenzo
Dr. Jamie Larson Dr. Travis Maddock
Dr. Guilherme Marquezini Ms. Kalyn Bischoff
Ms. Tera Black Ms. Francine Ciriaco
Mr. Jim Cassady Mr. Darren Henry
Mr. Vitor Mercadante Technical staff Support staff Collaborators
Beef cattle producers
Funding and Product Support
ABS Global, Inc. Blandin Foundation
Intervet Animal Health IVX/Teva Animal Health
Merial Animal Health MN-AURI
NAAB Zoetis
Select Sires, Inc. Univ. of FL Univ. of MN
OR State Univ. USDA-CSREES USDA-TSTAR
Thank You!
Contact Information
Cliff Lamb University of Florida
3925 HWY 71 Marianna, FL 32446
850-394-9124 [email protected]
Vitor Mercadante University of Florida
3925 HWY 71 Marianna, FL 32446
850-394-9124 [email protected]