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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 aim of the study was to determine the relative percentage of individual fatty acids and cholesterol content in the muscles of the rabbit hind leg as well as to estimate the efficiency of transfer of fatty acids from feed to tissue as affected by supplementation the diet with fish oil and vitamin E.Three groups of New Zealand White rabbits were used (one control and two experimental) with 40 animals per group. The animals of group I (control) were fed complete standard pelleted diet, of group II – control diet supplemented with 3% fish oil and those of group III – control diet with 3% fish oil and vitamin E. The content of the latter was increased by 100% as related to control (i.e.with 50 mg for 100 mg control diet). Fish oil introduced into rabbit diet had a beneficial effect on the composition of lipid fraction of meat. Relative share of n-3 PUFA increased and the decrease in the n-6/n-3 PUFA ratio occurred, both being beneficial from the dietetic point of view. A reduction (P≤0.05) of cholesterol content was shown in meat of animals from groups II and III. Fish oil made the fat of freeze-stored (-8°C for 14 or 90 days) meat slightly more susceptible to oxidation, but the vitamin E supplement prevented from that process. The study confirmed that it is beneficial to add dietary antioxidants to rabbit feed containing fats rich in UFA. The fish oil supplement had a beneficial effect on reducing carcass fatness and improving the juiciness and tenderness of rabbit meat.
The aim of the study was to determine the effect of essential unsaturated fatty acids (EUFA) in fish oil supplemented to doe diets on rearing performance of young rabbits and quality of their meat obtained at the end of growth at 90 days of age. Feeding a pelleted mixture containing 4% fish oil had a varying effect on rearing performance of young rabbits. It enabled better weight gains to be obtained at 21 and 35 days of age while having no effect on higher final weight on the day of slaughter. The fish oil supplement changed the fatty acid profile of intramuscular fat, increasing the level of n-3 PUFA, especially EPA and DHA acids, but this was paralleled by poorer sensory quality of meat.
Nutritional value of rabbit meat was compared with meat of chicken, beef and pork, based on the values from Polish, British, French, Danish and US national food composition tables. On the basis of this comparison it can be stated, that rabbit meat is relatively high in polyunsaturated fatty acids (PUFA), copper, manganese, potassium, phosphorus and especially in calcium and is also low in sodium. Modern animal husbandry allows for additional enrichment of rabbit meat in PUFA.
Oznaczano poziom pozostałości OTC w mięsie królików, przechowywanym w niskich temperaturach. Stwierdzono utrzymującą się aktywność przeciwbakteryjną pozostałości OTC w tkance mięśniowej, nerkach i wątrobach przechowywanych przez 21 dni w temp. +2°C i przez 90 dni w temp. -18°C.
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