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Pays : Roumaine
Production : lait /viande
Origine de la solution (source) : industrie et recherche
Niveau de solution:
X |
Connaissance |
X |
Pratique |
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Prototype |
Objectif : Pour une fertilité élevée des béliers et une augmentation des taux globaux de fécondité
Description:
La note d’état corporel (NEC) des béliers doit être comprise entre 3,5 et 4 au début de la saison de lutte (éviter les sous ou sur alimentation des béliers).
La circonférence scrotale des béliers lorsqu’ils sont mis avec les brebis doit être supérieure à 29 cm chez les béliers d’un an et d’au moins 33 cm pour les béliers adultes.
Pour augmenter la production de spermatozoïdes, en particulier hors de la saison sexuelle, 1 à 3 implants sous-cutanés de mélatonine peuvent être utilisés (18 mg/implant) pendant 35-40 jours avant la lutte.
Les béliers ne doivent pas être utilisés pendant plus de 2 cycles (34 jours), ils doivent être retirés du troupeau en lutte pendant au moins 5 à 7 jours avant d’être réintroduits.
La libido et la vigueur des béliers doivent être surveillées au début de la saison de lutte.
Bénéfices attendus : Une augmentation du taux de fécondité du troupeau de 5 à 10%
Prérequis et/ou limites :
Formation à la réalisation des NEC et à l’évaluation des circonférences scrotales
Désigner une personne pour observer le déroulement de la lutte dans le troupeau et surveiller l’état corporel des béliers pendant tout le déroulement de la période de reproduction
Le harnais pour bélier est un outil utile pour surveiller la libido du bélier.
- Les coûts des implants de mélatonine varient entre 2 et 3 EUR.
Publications scientifiques :
Meilán, J., & Ungerfeld, R. (2014). Does introduction of rams during the late luteal phase promote the estrus response in cyclic ewes? Small Ruminant Research, 120(1), 116–120. https://doi.org/10.1016/j.smallrumres.2014.03.011
Hawken, P. A. R., Evans, A. C. O., & Beard, A. P. (2008). Short term, repeated exposure to rams during the transition into the breeding season improves the synchrony of mating in the breeding season. Animal Reproduction Science, 106(3–4), 333–344. https://doi.org/10.1016/j.anireprosci.2007.05.009
Chanvallon, A., Scaramuzzi, R. J., & Fabre-Nys, C. (2010). Early sexual experience and stressful conditions affect the response of young ewes to the male. Physiology and Behavior, 99(4), 457–465. https://doi.org/10.1016/j.physbeh.2009.12.014
Ridler, A. L., Smith, S. L., & West, D. M. (2012). Ram and buck management. Animal Reproduction Science, 130(3–4), 180–183. https://doi.org/10.1016/j.anireprosci.2012.01.012
Al-Gubory, K. H. (1998). Effects of the presence of rams during pregnancy on lambing performance in ewes. Animal Reproduction Science, 52(3), 205–211. https://doi.org/10.1016/S0378-4320(98)00095-5
Ungerfeld, R., Forsberg, M., & Rubianes, E. (2004). Overview of the response of anoestrous ewes of the ram effect. Reproduction, Fertility and Development. https://doi.org/10.1071/RD04039
Tips & Tricks:
Expected impacts:
| Country | Romania | ||||||
| Partner | BUASVM | ||||||
| Topic | REPRODUCTION | ||||||
| Issue | Ram management | ||||||
| Solution No/Name | 16. Ram management during reproduction season | ||||||
| Service provider/technicians+vet or farmers | |||||||
| Benefit | |||||||
| Benefit expected | Increase productivity: -fertility |
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| System | |||||||
| Is the solution suitable for various production systems | Y | Precise the systems – all types define in the first survey | |||||
| If no – for which system | dairy & meat | ||||||
| Cost | |||||||
| What are the asset costs | <100 | <100 | 100-500 | 500-1000 | 1000-10000 | >10000 | |
| What are the maintenance costs | <50 | <50 | 50-100 | 100-500 | 500-1000 | >1000 | |
| Any limits to its applicability | No | ||||||
| Work Load | |||||||
| Farmers | Service provider/tech.-vet-others | ||||||
| How much time is required to prepare and implement the solution | >=1week | <1 day | 1 day – 1 week | >=1week | |||
| How many people is needed to implement the solution? | 1 person (the farmer) | ||||||
| Timing | |||||||
| How long it takes to get results? | >=1week | Immediate | <1 day | 1 day – 1 week | >=1week | ||
| How long it takes to see an effect on sheep productivity? | current production period | current production period | next production period | >next production period | |||
| Equipment/Facility | |||||||
| Farmers | Service provider/technicians-vet-others | ||||||
| What kind of equipment/tool are necessary? | Concentrate feeders, melatonin implants, tape for scrotal circumference assessment | ||||||
| Skill/Knowledge-Training (farmer) | |||||||
| Does the solution need any specific skill/knowledge or training? | Yes | ||||||
| How much time will be required for training | 1 day training | ||||||
| Wider Environment | |||||||
| Is there any particular regulation link to the solution? | NO | ||||||
| Does the solution need any particular structure or organisation? | NO | ||||||
Users’ evaluation:
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Country |
ROMANIA |
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Solution No/Name |
16. Ram management during reproduction season |
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Farmer/Service provider/technicians-vet-others |
F |
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Why did you select this solution? |
Having higher conception rates in the |
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Was it easy to implement? |
Relatively |
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If not say what are the identified drawbacks? |
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Did you need to adapt it? |
Yes |
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If yes, how? |
To meet all the requirements mentioned in the solutions |
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Were you happy with the outcome of the solution? |
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What were the outcomes? |
– |
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Score the solution |
Interesting, needs adjustment |
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Will you continue to implement it? |
Yes |
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If not, for which reasons? |
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Comments/Additions |
Using rams with harnesses it helps identifying the ewes that were serviced, and having them removed from the reproduction flock. Testicular circumference is less relevant and changes throughout the reproduction season, hard to monitor under commercial extensive conditions. |
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