Changes in amino acid composition of rabbit (Oryctolagus cuniculus) milk within the first 30 days after parturition
2001
Kracmar, S. | Gajdusek, S. | Jelinek, P. | Rous, P. (Mendelova Zemedelska a Lesnicka Univ., Brno (Czech Republic))
The variability and changes in amino acid composition of rabbit milk were studied in milk samples collected from 6 nursing female rabbits 2, 4, 11, 14, 17, 21, 24, 27 and 30 days after the parturition. The results documented a marked decrease in concentration from Day 2 to Day 11 after birth and subsequently to Day 30 a gentle decrease in dry matter (from 36.21 to 28.60 % and 26.98 %, respectively) and crude protein (from 21.09 to 13.80 % and 12.89 %, respectively). The highest concentrations of all amino acids were observed also on Day 2, changes in the contents from Day 2 to Day 30 were relatively small except Leu (its content dropped from 11.5 % on Day 2 to 10 % between Day 2 and Day 30) and Glu (a decrease from approx. 18-19 % between Day 2 and Day 11 to 15 % on Day 30). The average amino acid composition (expressed as percentage of total protein) was as follows: Thr 5.17 +/- 0.11, Val 5.07 +/- 0.11, Ile 5.47 +/- 0.10, Leu 11.02 +/- 0.67, Phe 3.93 +/- 0.32, His 3.38 +/- 0.26, Lys 6.46 +/- 0.40, Arg 4.31 +/- 0.51, Cys 1.54 +/- 0.05, Met 2.55 +/- 0.42, Asp 5.29 +/- 0.12, Ser 5.98 +/- 0.15, Glu 17.63 +/- 1.10, Pro 5.51 +/- 0.24, Gly 3.04 +/- 0.12, Ala 4.86 +/- 0.12 and Tyr 4.07 +/- 0.47.
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