Timisjärvi J, Nieminen M, Roine K, Koskinen M, Laaksonen H
Acta Vet Scand. 1982;23(4):603-18. doi: 10.1186/BF03546779.
The growth of the reindeer from birth to adulthood is cumulative consisting of a rapid weight accretion during summers followed by a weight loss or stasis during winters. The birth weight of the newborn calves is about 5.3 kg. The peri- and neonatal growth rate is rather high, with a greatest individual daily weight gain as high as 400 g. The polynomial growth curve and its first order time derivative of calves show a deceleration of weight gain towards the autumn. The weight of calves at an age of 10 months was 36 to 40 kg. Adult body weight is reached by females at an age of 3 to 4 years and by males on average a year later. Serum alkaline phosphatase activity showed a negative linear correlation with age and weight in calves and it was highest both in calves and adults in summer. The creatine Phosphokinase activity in both calves and adults was higher in summer than in other seasons. Serum inorganic phosphorus was highest in the growing calves. On the other hand serum thyroxine (T4), blood glucose and calcium did not show significant age-dependent or seasonal variations.
驯鹿从出生到成年的生长是累积性的，包括夏季体重快速增加，随后冬季体重减轻或停滞。新生幼崽的出生体重约为5.3千克。围产期和新生儿期的生长速度相当高，个体每日最大体重增加高达400克。幼崽的多项式生长曲线及其一阶时间导数显示，秋季体重增加速度减缓。10个月大的幼崽体重为36至40千克。雌性在3至4岁时达到成年体重，雄性平均比雌性晚一年。血清碱性磷酸酶活性与幼崽的年龄和体重呈负线性相关，并且在夏季幼崽和成年驯鹿中均最高。幼崽和成年驯鹿的肌酸磷酸激酶活性夏季高于其他季节。生长中的幼崽血清无机磷含量最高。另一方面，血清甲状腺素（T4）、血糖和钙没有表现出明显的年龄依赖性或季节性变化。
