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Rabbit growth performance, carcass traits and hind leg bone characteristics as affected by the sire breed, season, parity order and sex in an organic production system

100%

Zotte A. D., Paci G.

Animal Science Papers and Reports

2014

tom 32

nr 2

Live performance, carcass traits and hind leg bone characteristics of crossbred rabbits of both sexes (Sx) of two sire breeds (SB): Vienna Blue – (VB) and Burgundy Fawn – (BF) born with different parity orders (P: 1, 2, ≥3), reared organically and slaughtered in the spring and summer, when they reached 2.8 kg, were evaluated. The slaughter age of VB crossbreds increased between P1 and P2 (P<0.05). During the summer, the rabbits exhibited a higher slaughter age (P<0.01), reference carcass yield (P<0.01), and hind leg meat-to-bone ratio (P<0.05). The P2 crossbreeds exhibited the lowest incidence of scapular fat (P<0.05). The weights of the full gastrointestinal tract and skin were 2.4% higher and 1.5% lower in females, respectively (P<0.01), and head proportion was higher in males (P<0.05). Females exhibited a longer femur and thicker tibia than did the males (P<0.05).The results confirmed the slow growth rate of the crossbreds evaluated, which may represent an interesting genetic resource for organic production of rabbits.

The effect of organic vs. conventional rearing system on performance, carcass traits and meat quality of fast and slow growing rabbits

71%

Paci G., Dalle Zotte A., Cecchi F., De Marco M., Schiavone A.

Animal Science Papers and Reports

2014

tom 32

nr 4

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.

Ograniczanie wyników

2 Animal Science Papers and Reports

2 Paci G.

1 Cecchi F.

1 Dalle Zotte A.

1 De Marco M.

1 Schiavone A.

1 Zotte A. D.

2 2014

Wyniki wyszukiwania

Rabbit growth performance, carcass traits and hind leg bone characteristics as affected by the sire breed, season, parity order and sex in an organic production system

The effect of organic vs. conventional rearing system on performance, carcass traits and meat quality of fast and slow growing rabbits