99 research outputs found
Effect of heat stress on meat quality of growing rabbits divergently selected for body fat content
No full textHigh ambient temperature represents an increasingly frequent challenge for animal farming, especially for those animal species more susceptible to heat stress (HS), like the rabbit. The present research studied the impact of different ambient temperatures (T: 20 °C—Control vs. 28 °C—High) on the meat quality of two rabbit lines (L: Fat line, Lean line) obtained after 5 generations of divergent selection for total body fat content. After slaughter, the ground meat of 60 carcases (15 rabbits/treatment) was used for physicochemical and sensory quality evaluation. Overall, high T affected hind leg weight (p < 0.001), pHu (p = 0.001), and oxidative status (p = 0.004) during a shelf-life trial. High T increased meat haem-iron (p < 0.001), decreased lipids (p < 0.001), MUFA (p < 0.001), and PUFA classes (p < 0.001), and consequently, increased water content (p < 0.001). Regarding L effect, Fat line was richer in lipids (p < 0.001) and ash (p = 0.008), but less rich in water (p < 0.001) than Lean line. The content of all fatty acid (FA) classes was therefore significantly higher in Fat line meat (p < 0.001). It can be concluded that the two genotypes differed for proximate composition, haem-iron, FA, and amino acid profiles of carcase meat. High T increased meat pHu, water, haem-iron, and reduced polyunsaturated FA (PUFA) amount. At high T the meat of the Fat line showed higher TBARS, whereas Lean line had higher lysine content. Sensory analysis revealed that high T improved tenderness and extinguished onion off-flavour
Effect of CT-based selection on meat pHu, water holding capacity, and L*a*b* colour in the rabbit
No full textCan liquorice extract administered as dietary and/or as food supplement improve rabbit meat shelf-life?
No full textEffect of diet and packaging system on the oxidative status and polyunsaturated fatty acid content of rabbit meat during retail display
No full textThe aim of this study was to evaluate the combined effect of two dietary lipid sources (sunflower vs. linseed oil)
and three packaging methods (PVC film – BAG vs. modified atmosphere CO2 20%+80% O2 – MAP vs. and
vacuum - VAC) on the oxidative status and polyunsaturated fatty acid content of rabbit loins (Longissimus thoracis
et lumborum muscle), at days 1, 4 and 10 of simulated retail display. The diet, storage time and packaging
method affected the oxidative status of rabbit meat under retail display. As expected, storage time, independently
on the other factors, significantly reduced the antioxidant content of loin meat. Accordingly, TBARs
values significantly increased during storage, as well as the dietary supplementation of linseed. The fatty acid
profile of the fresh loin closely respected that of the diets. At day 10, oxidative status and fatty acid profile of
MAP samples could be yet considered optimal
Effect of an in-vivo and/or in-meat application of a liquorice (Glycyrrhiza glabra L.) extract on fattening rabbits live performance, carcass traits and meat quality
No full textDivergent selection for total body fat content of growing rabbits. 3. Effect on carcass traits and fat content of meat.
No full textEffect of adult weight and CT-based selection on rabbit meat quality
No full textThis study compared the meat quality of different genotypes. Maternal (M; adult weight/AW/=4.0-4.5kg; selected for the number of kits born alive), Pannon White (P; AW=4.3-4.8kg) and Large type (L; AW=4.8-5.4kg) rabbits were analysed. P and L genotypes were selected for carcass traits based on CT/Computer tomography/data. Rabbits were slaughtered at 11wk of age and hindleg (HL) meat and M. Longissimus dorsi (LD) were analysed for proximate composition and fatty acid (FA) profile. Proximate composition was unaffected by the selection programme, even though the meat of P rabbits was leaner and had higher ash content (P<0.10). The LD meat of P rabbits exhibited significantly lower MUFA contents compared to M and L rabbits (25.4 vs 28.0 vs 27.7%; P<0.01) and higher PUFA content compared to M rabbits (31.9 vs 24.9%; P<0.05). This study revealed that long-term CT-based selection is effective in increasing meat leanness and PUFA content
Rabbit's preference for cages and pens with or without mirrors
No full textFive week-old Pannon White rabbits were housed in a closed climatized rabbitry and randomly
assigned to pens (56 rabbits) having a basic area of 1 m2 with a stocking density of 16 and 12
rabbits/m2 or to 18 individual cages (0.24 m2; 1 rabbit/cage; stocking density of 4 rabbits/m2). The
pens and the cages were divided into 2 parts and animals could move freely among the 2 parts through
swing doors. The vertical sides of one part of the pens and cages were completely covered with
mirrors while the other part was covered with white plastic panels. A 24 hour video recording was
performed twice a week using infrared cameras and the number of rabbits in each pen and cage was
counted with a frequency of 15 minutes (96 times a day). The duration of the trial was 6 weeks. The
lighting period was 16L/8D. Rabbits were fed ad libitum a standard diet and water was available ad
libitum from nipple drinkers. Throughout the entire rearing period 67% of the individually caged
rabbits showed a preference for the part of the cage enriched with mirrors (P<0.001). This preference
slightly decreased with increasing age. The strong preference toward the part of the cage provided
with mirror walls was independent of the time of day. That is, during the active period (11:00 pm –
05:00 am), which corresponds to the dark part of the day, rabbits still preferred the mirror-side even
though they were not able to see their own reflected image at that time. Neither rearing rabbits in
groups under different stocking densities (12 vs. 16 rabbits/m2) nor the presence of conspecifics
reduced the interest toward mirrors. 65% of animals living at the stocking density of 16 rabbits/m2 and
61% of those living at the density of 12 rabbits/m2 were found on the side with mirrors (P<0.001)
during all the recordings. Group-penned rabbits showed a decisive preference toward mirrors during
the active period (71 to 74% for stocking densities of 12 and 16 rabbits/m2, respectively; P<0.001).
The results suggest that the mirrors’ presence offers some advantages, perhaps related to comfort and
welfare that could be used as environmental enrichments for fattening rabbits. However, the
installation costs should be taken into account before considering their use for long time individually
caged animals and for group-penned rabbits
Effect of Carduus marianum herb on the productive performances of growing rabbits
No full textThe European ban of AGPs in the animal feed from 2006 had 151
revived doubts previously considered dismissed, such as those regarding the control of the farm animal productive performances and health status protection. Carduus marianum is an herbaceous plant from the Mediterranean countries traditionally used in liver and gastrointestinal diseases as natural remedy. In the present study was shown the efficacy of Carduus marianum podwer feed addictive in the growing rabbit performances. 144 animals were divided in three groups: the control group (C=51 animals) was fed
with a basal diet, the other two groups received the basal diet with supplementation of Carduus
marianum herbal power in two concentrations: 0.5% (H1, n=48) or 1.0% (H2, n=45). The rabbits
were reared from 5th to 11th weeks and, subsequently, were slaughtered, then carcasses were
weighed, chilled for 24 h at 3 °C, dissected and carcass yield were calculated. Fore, mid and hind
parts were dissected and the percentage on the chilled carcass was calculated. The results showed
how growth performances and carcass traits were not affected by supplementation of Carduus
marianum herbal extract, with exception of H2 mortality values that were lower (P<0.05)
particularly during the week 7-8
Az elvàlasztàs utàni takarmànykorlàtozàs hatàsa a novendéknyulak termelésére és vàgàsi tulajdonsàgaira.
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