Composition of cow-calf units consisting of known individuals alive at the end of 2012.
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https://figshare.com/articles/dataset/_Composition_of_cow_calf_units_consisting_of_known_individuals_alive_at_the_end_of_2012_/883043
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资源简介：
Males are excluded here after the age of dispersal because of the lower confidence in age classification, therefore the proportion represented by each age class is presented for females only.
创建时间：
2013-12-20
