evaluating progesterone profiles to improve automated oestrus detection · 2015. 9. 15. ·...
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Evaluating progesterone profiles to improve automated oestrus detection
Claudia Kamphuis, Wageningen UniversityKirsten Huijps, CRVHenk Hogeveen, Wageningen and Utrecht University
- First insemination between 40-70 DIM is optimal*
- oestrus detection is a key driver
- Challenges of detection- Time consuming- Error prone- Increased herd sizes
The importance of oestrus detection
*Inchaisri et al., 2012
- 20% of Dutch dairy farms have automated systems*
- Appears to be a success story
- 20% of Dutch dairy farms have automated systems*
- Appears to be a success story when it all works- Sensitivities 80-90% with specificities > 90%**
- No technical / human errors
Adoption automated oestrus detection
*Huijps, 2014, CRV, personal communication*Huijps, 2014, CRV, personal communication**Rutten et al., 2013
- Normal cycle takes 21 days
- Does progesterone affect oestrus behaviour- Affect automated oestrus detection?
Progesterone and oestrus
Days
Pro
ges
tero
ne
(ng
/m
l)
Behavioural changes
Aims of this study: gain insight in
- Performance of oestrus detection in the field
- Timing of oestrus alerts
- Use of alerts by farmers
- Effect of combining oestrus alerts on performance
- Effect of progesterone profiles on oestrus detection
Materials and Methods
- 31 cows, 40-70 DIM, not inseminated
Farm A (450) Farm B (AMS; 250)
Milk samples for 24 days Morning milkingsResidual milk12 cows
First milkingsWhole milk19 cows
Oestrus alerts System A: 12 cowsSystem B: 12 cows System B: 8 cows
System C: 19 cows
Oestrus observations Farm Staff Farm Staff
Average DIM at start 44 53
Average Parity 5.5 2.4
Hormonost-Microlab Farmertest, Biolab, Unterschleissheim, Germany
Progesterone profiles from milk samples
- Commercial on-farm kit
- Analyses 3x a week- Including forgone 1 / 2 days
- Profiles created
- Visual assessment of heat- According to manual- Gold standard
Results: heats, observations and alerts
- Based on Progesterone (P): 30 heats from 30 cows
Farm Staff System
A B C
Heat observed/alerts generated 15 14 12 31
Heat alerts on day with P‐heat 3 9
Heat alerts on day with P‐heat +/‐ 1 day 9 17
False positive observations / alerts 6 4 5 18
Results: timing alerts and observations
0
1
2
3
4
5
6
-23 -13 -3 7 17
Nu
mb
er o
f al
erts
/ob
serv
atio
ns
days around day of P-heat (day = 0)System A
Results: timing alerts and observations
0
1
2
3
4
5
6
-23 -13 -3 7 17
Nu
mb
er o
f al
erts
/ob
serv
atio
ns
days around day of P4heat (day = 0)System A System B
Results: timing alerts and observations
0
1
2
3
4
5
6
-23 -13 -3 7 17
Nu
mb
er o
f al
erts
/ob
serv
atio
ns
days around day of P4heat (day = 0)System A System B System C
0
1
2
3
4
5
6
-23 -13 -3 7 17
Nu
mb
er o
f al
erts
/ob
serv
atio
ns
days around day of P4heat (day = 0)Farm staff System A System B System C
Results: timing alerts and observations
84% of all alerts87% of all observations
are 3 days around P-heat
False or True?
Results: combining detection systems
Using a 1 day time window around a P-heat
Farm A System A: 5 out of 12 P-heats (42%) System B: 3 out of 12 P-heats (25%) One P-heat additionally detected
Farm B System B: 2 out of 18 P-heats (11%) System C: 9 out of 18 P-heats (50%) No additionally P-heat detected
Results: effect of progesterone profiles
0
5
10
15
20
25
30
-23 -20 -17 -14 -11 -8 -5 -2 1 4 7 10 13 16 19 22
Pro
ges
tero
ne
leve
l (n
g/
mL)
Days around P-heat (day = 0)Average P levels
Results: effect of progesterone profiles
0
5
10
15
20
25
30
-23 -20 -17 -14 -11 -8 -5 -2 1 4 7 10 13 16 19 22
Pro
ges
tero
ne
leve
l (n
g/
mL)
Days around P-heat (day = 0)Average P levels Detected P-heats
Results: effect of progesterone profiles
0
5
10
15
20
25
30
-23 -20 -17 -14 -11 -8 -5 -2 1 4 7 10 13 16 19 22
Pro
ges
tero
ne
leve
l (n
g/
mL)
Days around P-heat (day = 0)Average P levels Not detected P-heats Detected P-heats
Conclusions
* Rutten et al., 2012; Kamphuis et al., 2012
- All 3 systems performed less than expected- Expected: 80%*; Found: 25-50%
- Farm staff missed 48% of true positive alerts- Not checked alerts / behavioural changes
already passed
- Most alerts and observations around 3 days of P-heat
- Progesterone profiles did not differ between (non)detected cows
Take Home Message
- Farmers miss correctly identified oestrus's
- Progesterone does not affect oestrus behaviour
- Confirm with larger numbers- Successful inseminations as gold standard
Acknowledgements
- Hands-on- Farmers- Farm staff- Marije Popta and Gea Miedema
(Van Hall-Larenstein, Leeuwarden)
- Funding
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