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The study aimed at determining fatty acid (FA) profiles of meat of seasonally fed slow-growing rabbits in relation to lipid composition of feeds and their intake. In each season, 21 weaned male rabbits (Popielno White breed) were assigned into two homogenous groups: the control (C, n=7) and seasonally fed - summer (S, n=14) or winter (W, n=14). Meat lipid, MUFA and PUFA contents were significantly higher in the S and C groups, most likely due to a higher lipid intake, while S-rabbits had two-fold higher n-3 PUFA contents than C-rabbits. This resulted in a better thrombogenic index in S- rather than in C-rabbits, similarly as it was the case for the hypocholesterolemic/ hypercholesterolemic (H/H) ratio. In relation to the other groups myristic and palmitic acid contents in meat were greater in W-rabbits due to a higher SFA intake. As compared with the C diet, seasonal diets were associated with a higher proportion of n-3 PUFA in meat. This resulted in an improvement of the n-6/n-3 ratio (3.62 on average) in meat from seasonally fed rabbits. Both seasonal diets also increased the content of odd-numbered and branched-chain acids (OBCFA; twofold greater than in the C group). S-rabbits had greater daily body mass gains and were heavier than the W-rabbits. The content of palmitooleic acid (C16:1 n-7) in meat was high irrespective of the diet. Feeding strategies associated with outdoor rearing, adopted in small farms, favour local rabbit populations. Thus, it is recommended to promote native, slow-growing rabbit breeds, a source of valuable nutrients.
The effect of different housing systems was evaluated on productive performances and carcass and meat quality of a “local grey” population of rabbits (G). To compare data obtained from G,commercial hybrid rabbits (H) were reared and fed under standard practice. Rabbits were reared as follows: 96 G in outdoor colony cages (O) and fed organic feed based on pelleted feed (oP) and alfalfa hay (H) - group GOoPH; 80 G in conventional indoor colony cages (I) and fed the same organic diet (GoPH) - group GIoPH; 96 G in I and fed conventional pelleted diet (cP) - group GIcP;88 H in I and fed conventional pelleted diet (cP) - group HIcP. Fifteen rabbits of each group were slaughtered at live weight of 2500 g (100 days of age for G and 87 days of age for H), carcass and meat quality parameters were assessed. HIcP showed the highest average daily gain (33.5 g/day;P<0.05) and GOoPH the poorest total feed conversion (5.6; P<0.05). G showed the highest slaughter yield (P<0.05). GOoPH showed higher loin proportion and the lowest LL pH at 45 min post mortem(P<0.05). HIcP produced LL and BF meat with the less intense colour and rich in ash. LL meat of GOoPH was the richest in protein. GOoPH and GIoPH LL meat showed higher amount of C14:0 and 18:1 n-9. GOoPH showed the lowest value of 18:2 n-6, and HIcP showed the highest value of 20:4 n-6 and the lowest amount of 16:1 n-7. The G yielded meat with higher nutritive value, and the best results were obtained when animals received both pellets and hay and were reared outdoor.
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