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Forty 7-week-old ducks, 5 males and 5 females, from strains A44 and P66 and conservation flocks P33 and K2were investigated. Their carcasses were dissected and chemical composition of the pectoralis major muscle wasanalysed. The carcasses of A44 and K2 drakes and ducks contained (%) significantly more pectoral musclescompared to the carcasses of P66 and P33 drakes and ducks. The carcasses of K2 males contained significantlyless (%) thigh and lower thigh muscles than the carcasses of P66 and P33 males. The carcasses of K2 femaleshad significantly less skin with subcutaneous fat compared to the carcasses of A44, P66 and P33 females.Pectoralis major muscle of drakes and ducks from conservation flocks contained more soluble collagen in totalcollagen than in animals from breeding strains. Moreover, the muscle of K2 males and females was found tocontain more polyunsaturated fatty acids than in A44 males and P66 females, respectively. Pectoralis majormuscle of drakes and ducks from both conservation flocks was characterized by a significantly lower energyvalue than in P66 drakes and ducks of both strains, respectively

Basic elements of eviscerated carcass and chemical composition of pectoral muscle in selected and unselected ducks (short communication)