Managing Reproduction in Hyperprolific Sow Herds

Effects of sow, boar, and semen traits on sow reproduction

Sow Reproductive Performance in Institutional Herds in Benue State,

This study was carried out to determine the reproductive performance of sows in institutional swine herds which serve as model herds in Benue state, central Nigeria. Herd records on 185 sows that littered 3,995 piglets from three herds were used for the analysis of reproductive and production performance. Management practices including reproductive management, herd structure, breeds of sows, an...

The Repeatability of Pregnancy Rate in Danish Sow Herds

The individual differences between sows in ability to become pregnant were investigated. Data from a sample of 10 Danish sow herds with a total of 5786 sows was analyzed. The purpose was to estimate variance between sows in ability to become pregnant. The results indicated a low variability between sows in this ability. 7 % of the total variance could be accounted for as the difference between ...

Toft : Model Based Decision Support in Sow Herds 55 Model Based Decision Support in Sow Herds with Emphasis on Linking Decisions with Diierent Time Horizons

Herd management is essentially decision making under uncertainty. The manager makes decisions without speciic knowledge of the future (and present) state of the system. Decisions made on the tactical level are generally more uncertain than the ones on the operational level. However, a tactical decision will have an innuence on the decisions made on the operational level through the timehorizon ...

Optimal Replacement Policies and Economic Value of Clinical Observations in Sow Herds Optimal Replacement Policies and Economic Value of Clinical Observations in Sow Herds 2 3

25 Even though several sow replacement models have been published, integrating 26 information about the health status of sows has not yet been handled satisfactorily. This 27 paper presents a framework for integrating a Weak Sow Index (WSI) into an existing 28 sow replacement model. The WSI, which is developed as part of this study, quantifies 29 various clinical signs into one numerical value ...