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Vulnérabilité et autonomie alimentaire des espaces insulaires : une approche par scénarios démographiques pour évaluer les dynamiques du cheptel bovin allaitant à la Réunion

Abstract : This thesis presents an economic and zootechnical approach on suckling cattle in Réunion Island. In order to respond to the existing controversies about the role of livestock in development, we conducted a study of the contribution of the beef sector to the reduction of structural economic vulnerability. To do so, we first showed that food dependency is an important factor of vulnerability for small island spaces. Our proposal was based on the construction of a composite vulnerability index using an endogenous weighting method for robustness reasons. Secondly, we identified the agricultural sectors that are most likely to reduce Réunion's food dependency. The suckling cattle sector appeared to be the most promising because of its strong structure, its capacity to valorize local resources and the possibility of gaining market shares in a logic of import substitution. We then conducted a study of the determinants of the past dynamics of the beef sector in Réunion. We showed that this production reacts mainly to macroeconomic determinants which, through farmers' decisions, can lead to a degradation of the zootechnical performances of the animals. We also showed how the cooperative's reaction to respond to a crisis situation conducted to revive the growth of the herd and of the production. We then looked at the parameters influencing the productivity of Réunion’s suckling herd through the construction and analysis of a demographic model. Our results showed that reproductive and growth performances are the most important to increase productivity. From these elements, we built several scenarios in close collaboration with the cooperative. In particular, these scenarios integrated elements on the improvement of animal performance, changes in farmers' practices and changes in the organization of production at the cooperative level. We showed that performance improvement, herd rejuvenation, the introduction of sexed artificial insemination and fattening on grass are means of increasing Réunion’s meat production. Our thesis provides arguments for reconsidering the role of agriculture in the structural economic vulnerability of Réunion Island and demonstrates the interest of developing the suckling sector to reduce this vulnerability. It also presents avenues of reflection for decision-makers and stakeholders in the field with the aim of increasing beef production in Réunion. In this sense, it constitutes an in-depth study of the reasons for and means of developing the suckling cattle industry at the scale of a tropical island territory.
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Submitted on : Thursday, September 16, 2021 - 9:34:52 AM
Last modification on : Tuesday, October 19, 2021 - 5:56:08 PM
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  • HAL Id : tel-03346045, version 1


Maximin Bonnet. Vulnérabilité et autonomie alimentaire des espaces insulaires : une approche par scénarios démographiques pour évaluer les dynamiques du cheptel bovin allaitant à la Réunion. Economies et finances. Université de la Réunion, 2021. Français. ⟨NNT : 2021LARE0003⟩. ⟨tel-03346045⟩



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