Changes in survival of Cattle Bos taurus in Trondheim during the Medieval period
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Abstract
In the present study excavated bone material of Bos taurus from the Medieval City of Trondheim is used to investigate the slaughtering practice throughout the period from the 11th century to the 15th. The distribution of the proportion of bones with non-fused epiphyses in different bones gives information about the age-distribution of the animals. A method for estimation of survival curves, based on logistic regression, is proposed, and the density function is derived. We find that the slaughtering of young calves was reduced from the 11th century to early in the 14th century. Then, in the period just after the Black Death, the slaughtering of young calves increased, but it did not reach the high level of the 11th century.
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