[Defending thesis] Raphaël Gauthier: Nutritional requirements modelling and precision feeding of lactating sows

Raphaël Gauthier is one of the #DigitAg co-funded PhDs

 

Raphaël will defend his thesis on 5th March at 2.30 pm, in the premises of AgroCampusOuest

Due to the sanitary situation, the defence will be attended through visioconference.

To connect to Raphaël’s defence


Nutritional requirements modelling and precision feeding of lactating sows

  • Start Date: November 2017
  • University:  Bretagne – Loire
  • PhD School: EGAAL , Rennes
  • Field(s)Data Mining, Animal Nutrition, Modelling
  • Doctoral Thesis Advisor: : Jean-Yves Dourmad, Inrae, Pegase
  • Co-supervisors : Christine Largouët, AgroCampus Ouest, Irisa-Inria
  • Funding: #DigitAg – Inrae
  • #DigitAg: Co-funded PhD – Axis 6 – Challenge 4

Keywords: modelling, animal nutrition, lactating sows

Abstract: Because of the variability in sows milk production and appetite, the nutritional requirements differ largely between farms, between animals from the same farrowing batch, between successive batches due to seasonal variations, and between successive days during lactation, whereas in practice the same diet is generally fed to all sows in a herd. The availability of new technologies for high throughput phenotyping of individual sows and of their environment offers new opportunities for a renewed practical implementation of prediction models of nutritional requirements and performance. The integration of these prediction models in decision support tools incorporated in feeding equipment is thus an important issue for pig farmers and for the companies that develop this equipment. The objective of this thesis is to produce the knowledge required for a more integrated and dynamic approach of feeding lactating sows, by considering all the information available when deciding the optimal composition and amount of feed to be fed to each sow, each day, the ration being prepared by an automatic feeder. The scientific issues consist in a change of paradigm resulting from the possible access to real-time data specific to each animal and their environment as well as to historic data relative to the animal itself (e.g., previous lactation) to similar animals from the same farm or from similar farms. The research question deals with the real-time determination of nutritional requirements of lactating sows and its implementation in practice: “How can we decide in real-time the optimal composition and amount of feed to be fed to a lactating sow using in all the available information at this time?”

Jury composition:

Rapporteure : Marie-Pierre Létourneau-Montmigny (Professeure à l’Université Laval, Québec, Canada)
Rapporteur : Jean-François Mari (Professeur à l’Université de Lorraine, INRIA)
Examinatrice : Marie Saint Dizier (Professeure à l’Université de Tours)
Examinateur : Yannick Lecozler (Professeur à Institut Agro) (représentant de l’ED EGAAL)
Examinatrice : Nathalie Quiniou (IFIP-Institut du porc, HDR)
Examinateur : Sébastien Picault (INRAE, ONIRIS, HDR)
Membre : Christine Largouët (Institut Agro, IRISA, INRIA, HDR, Co-directrice de thèse)
Membre : Jean-Yves Dourmad (INRAE, HDR, directeur de thèse)


Contact:  raphael.gauthier [AT] inra.fr​ – Tél : 0626960727

Networks: ResearchGateTwitter


International Papers
Gauthier, R., Largouët, C., Gaillard, C., Cloutier, L., Guay, F., Dourmad, J.-Y., 2019. Dynamic modeling of nutrient use and individual requirements of lactating sows. J. Anim. Sci. https://doi.org/10.1093/jas/skz167

Papers at international conferences
Gauthier, R., Largouët, C., Gaillard, C., Cloutier, L., Guay, F., Dourmad, J.-Y., 2019. Modélisation dynamique de l’utilisation des nutriments et des besoins individuels chez la truie en lactation. Journées Rech. Porcine. 51, 117–122 https://hal.archives-ouvertes.fr/hal-02010788

Gauthier, R., Guay, F., Brossard, L., Largouët, C., Dourmad, J.-Y., 2018. Precision feeding of lactating sows: development of a decision support tool to handle variability, in: EAAP 2018 – 69th Annual Meeting of the European Federation of Animal Science, Book of Abstracts of the 69th Annual Meeting of the European Federation of Animal Science. Wageningen Academic Publishers, Dubrovnik, Croatia https://hal.archives-ouvertes.fr/hal-01949645