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Danube White (DW) sows are characterized by high fertility (total no. of piglets born) reaching 10.3 and 11.5. piglets in the first and fourth litter, as well as by high no. of piglets born alive – 10.0 and 10.6, respectively. Mean daily live weight gain of DW pigs fattened over a period of 91 days amounts to 780 g, and feed conversion ratio to 3,365 kg/kg gain. The mean backfat thickness from three measurements reaches 25 mm with high coefficient of variation suggesting a need and feasibility of further intensive selection to decrease the trait value. Although DW pigs are recognized as stressresistant (sensitivity to stress appears in 12.2% individuals), periodical control of the spread of Hal+ individuals within the population is suggested, assisted with a proper selection. DW pigs are considered suitable for traditional conditions of maintenance and feeding and thus for production of “ecological” meat.
Fattening performance and carcass compositions were compared between Akkaraman (A), Kývýrcýk x Akkaraman F2 (KAF2 ), Kývýrcýk x (Kývýrcýk x Akkaraman) first backcross (KAB1 ), Chios x Akkaraman F2 (CAF2 ) and Chios x (Chios x Akkaraman) fist backcross (CAB1 ) ram lambs. After weaning at 3 months of age, the lambs were fed ad libitum concentrate and 300 g of alfalfa hay per lamb, per day. Six lambs of each genotype were slaughtered at 45 kg live weight and the carcasses were evaluated. The average daily weight gain and feed conversion efficiencies were 284, 271, 279, 282, 274 g and 4.92, 4.81, 4.76, 4.89, 5.01 for A, KAF2 , KAB1 , CAF2 and CAB1 , respectively. Corresponding values for cold dressing percentages were 49.28, 48.89, 48.18, 49.15 and 46.79, respectively. The weight of various fat depots differed (P<0.001 or P<0.01) among genotypes, but the weight of major cuts as a percentage of carcass weight did not differ significantly among genotypes except for percentage loin (P<0.05). It was concluded that there were no statistically significant differences for fattening performance among genotypes and that KA crossbred lambs had a higher percentage of loin and a lower percentage of bone in some of the major cuts. Also, there was a tendency for genotypes with lower tail fat weight to have a higher depot fat.
A fatty acid (FA) profile was determined in two repeations of superficial and intermuscular fat derived from legs of 64 lambs. More favourable profile of both types of fats was obtained in the intensive fattening, mainly owing to a higher content of polyunsaturated FA (PUFA). Body weight of lambs (20-30 vs. 30-40 kg) had no effect on FA profile, with the tendency, however, of being more favourable in lambs fattened to lower body weight. Lambs’ sex differentiated their FA profile to a limited range, with the tendency of being more favourable in ram- than in ewe-lambs, mainly owing to the higher PUFA content. The location of fat deposited within the leg did not differentiate the composition of FA (including CLA content), with lower cholesterol content of superficial than intermuscular fat.
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