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Abstract The genetic management of small population is reviewed with the main objective of making the endangered breeds profitable, addressing the genetic improvement aspect. The discussed methods are: optimum contribution selection; maximum avoidance of inbreeding and factorial matings, making...
Abstract The hormone content of a birds’ egg may reflect the environmental conditions of the bird. In this study we measured hormone concentrations of eggs from hens living under different housing conditions. Eggs from 16 floor-housed and 16 singly caged hens were analysed for androstenedione...
Abstract Breeding for larger size in the blue fox has been successful. Today, most of the animals are large and fat at pelting time, but obesity is also more common. Extreme fatness is detrimental especially for young vixens, because fattening followed by fast and pronounced weight loss for the...
Abstract The objective was to investigate the variation in backfat at weaning and its relations to reproduction results in organic sow herds in Denmark. The study included eight herds and 573 sows. The average backfat at weaning (mean = 13 mm; SD = 4.2 mm) ranging from 10.5 to 17.3 mm among...
Abstract Welfare of growing bulls was evaluated using on-farm scoring modified by well-described test theory methods. Production parameters of the bulls were collected at slaughter. A positive relationship was observed between on-farm welfare, using the full A-Index score, and daily carcass gain...
Abstract The objective of the study was to investigate the effects of oil sources in the diet on milk yield, milk composition, and fatty acid (FA) profiles in mid-lactating dairy cows. Forty-eight Chinese Holstein dairy cows averaging 150 days in milk (DIM) at the start of the experiment (body...
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