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Communication Dans Un Congrès Année : 2008

Identifying priorities among physiological functions: interactions between growth, pregnancy and lactation in dairy goat

Résumé

By strongly soliciting female’s biology, intensive livestock farming systems can lead to competition among physiological functions. This competition is mainly based on priority rules among growth, pregnancy and lactation. This study aimed at investigating these priority rules in dairy goats. Measurements of body weight (BW), milk yield (MY), litter size and litter weight from 426 pregnancy-lactation cycles were analysed with GLM procedures. Our results reinforce the effect of maturity on pregnancy parameters with primiparous goats having lower litter size and weight than adults. Our results also show: i) a negative effect of prolificacy on BW gain due to growth and anabolism during gestation (-0.4 kg/kg of litter); ii) a delayed effect of prolificacy on BW loss and milk production during early lactation (+ 0.9 kg of BW loss between one and two kids born; + 218.5 g of MY/d per kid born); iii) a negative effect of milk production on reconstitution (- 11g/d of average daily gain per kg of MY/d) and a positive effect of BW loss (+ 2 g/d of average daily gain per kg of BW loss). This study highlights the interactions among growth, pregnancy and lactation and their effects on goat responses. It also emphasizes the need to consider a given productive response as an integrated part of a whole productive life in order to increase our understanding of the physiological limits.
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Dates et versions

hal-01173461 , version 1 (07-07-2015)

Identifiants

  • HAL Id : hal-01173461 , version 1
  • PRODINRA : 25150

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Laurence Puillet, Muriel Tichit, Olivier Martin, Joseph-Alexandre Tessier, Daniel Sauvant. Identifying priorities among physiological functions: interactions between growth, pregnancy and lactation in dairy goat. 59. Annual Meeting of European Association for Animal Production, Aug 2008, Vilnius, Lithuania. ⟨hal-01173461⟩
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