MILK BIOCHEMICAL COMPOSITION AND HISTOLOGICAL STRUCTURE OF THE MAMMARY GLAND IN RELATION TO THE HORMONAL PROFILE IN RABBIT DOES
Zerrouki Daoudi N., Amroun T. T., Amroun Dj., Boumahdi Z., Charlier M.
Pages: 655-661 Published: 9 Jun 2016
Views: 1,417 Downloads: 345
Abstract: The objective of this work is to study the variation of physicochemical parameters of milk produced by rabbits does during lactation period, histological changes affecting the mammary gland and hormone profiles (prolactin, progesterone and estrogen). Thirty does of synthetic strain (SS) were inseminated (AI) and followed for three reproductive cycles during the summer season. The physicochemical parameters of milk were determined. A histological study was performed on the mammary glands taken from 6 rabbits does. The assay of reproductive hormones was performed to complete this study. Synthetic strain does produce on average 2693,04g of milk over the three weeks of lactation, which is 128,24g of milk/day. The analysis showed a variation of chemical and biochemical parameters of milk during the three weeks of lactation. Primiparous does produce richer milk in fat and protein, which explain the high rate of growth and the lowest mortality of young rabbits, recorded during this phase in this strain. Histological changes in the mammary gland were observed with a specific hormonal profile for this period. The peak of prolactin is observed throughout the lactating period allowing the maintenance of this production.
Keywords: milk, mammary gland, prolactin, protein content, fat