Conception of new bioeconomic indexes to evaluate caprine genotypes productivity

Part of the EAAP – European Federation of Animal Science book series (EAAP, volume 129)

Abstract

The comparison of different caprine genotypes’ productivity remains limited by the technical and zootechnical parameters used to evaluate the individual animal performances such as kid’s growth, goat lactation or herd reproduction. Data issued from 16 years of periodical animal survey of a herd compound from local goats, pure breeds and crosses was used to elaborate new bio-economic indexes allowing an accurate evaluation of the productive potentialities per genotype. The bio- economic indices have been developed to correct dairy performance and growth by the genotype reproductive parameters and kids’ mortality rates. These indexes of overall productivity of genetic groups were subsequently adjusted by the metabolic weight of each group to take into account the production charges per animal which vary with the adult body size. The application of bio-economic indexes led to a genotypes classification quite different from this based on the comparison of individual performances. Some breeds, having high lactating performances or heavy kids weights at weaning, seem severely penalized by infertility or kid’s mortality rates. Hence, the integration of the components of profitability, such as fertility, mortality and metabolic weight, in the evaluation criteria is essential for the reasonable herd management and genetic improvement. However, the development of bio-economic indexes must take into account all the components and production factors affecting the final animal phenotype and the farmer incomes.

Keywords

goat kids ‘growth dairy production bioeconomic indexes 

References

  1. Akinsoyinu, A. O., Mba, A.U., And Olubajo, F.O.: Studies on milk yield and composition of the West African Dwarf goat in Nigeria. J. Dairy Res., 1997, 44: 57-62.Google Scholar
  2. Caja, G.: (1990) Evolution des systèmes de production ovin-lait dans le bassin Méditerranéen Options Méditerranéennes, 12:31-38Google Scholar
  3. Gaddour, A.: (2005) Performances de croissance et de production laitière des groupes génétiques caprins issus d’un croisement d’absorption de la chèvre locale dans les oasis du sud tunisien, Mastère en génétique et bio ressources. Faculté des Sciences de Tunis, 2005Google Scholar
  4. Najari, S. Caractérisation zootechnique et génétique d’une population caprine. Cas de la population caprine locale des régions arides tunisiennes, Thèse de doctorat d’Etat, 2005, 214 p.Google Scholar
  5. Najari, S., Gaddour, A., Ben Hamouda, Djemali, M., M., Khaldi, G. Growth model adjustment of local goat population under pastoral conditions in tunisian arid zone. Journal of Agronomy., 2007, ISSN 1812-5379.Google Scholar
  6. Najari, S., Gaddour, A. Abdennebi, M. Ben Hamouda, M. Et Khaldi, G. Caractérisation morphologique de la population caprine locale des régions arides tunisiennes, Revue des Régions arides., 2006, 17: 23-41.Google Scholar

Copyright information

© Wageningen Academic Publishers 2012

Authors and Affiliations

  1. 1.Laboratoire d’Elevage et de la Faune Sauvage des Régions Arides et DésertiquesInstitut des Régions AridesMédenineTunisia

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