Hoffman R A, Davidson K, Steinberg K
Growth. 1982 Summer;46(2):150-62.
Weight gain in control and pinealectomized male golden hamsters is enhanced by exposure to short photoperiods (LD 8:16). Modest temperature reductions (10 degrees C) enhanced weight gain also, especially in the blinded animals. In the absence of both eyes and the pineal gland, neither temperature nor photoperiod had much or any effect on weight gain. Food consumption on the other hand increased only as a consequence of lowered temperature. Efficiency of food utilization was maximal at higher (22 degrees C) temperature and long photoperiods (LD 16:8). Epididymal fat pads in control animals were consistently increased by short photoperiods in either temperature. They were increased in pinealectomized and decreased in blinded animals as a consequence of lowered temperatures in either photoperiod. Total body weight gain in the several environments was not correlated directly with fat pad weights. Free thyroxine (T4) levels in control animals seemed to be negatively correlated with fat pad weights. Both T4 levels and fat pads were unchanged by temperature or photoperiod in blinded, pinealectomized animals. The data suggest a complex interaction of temperature, light and the pineal gland on body weight, fat deposition and serum T4.
暴露于短光照周期（LD 8:16）会增强对照和松果体切除雄性金黄仓鼠的体重增加。适度降温（10摄氏度）也会增强体重增加，尤其是在失明动物中。在既没有眼睛也没有松果体的情况下，温度和光照周期对体重增加都没有太大影响或根本没有影响。另一方面，食物消耗仅因温度降低而增加。食物利用效率在较高温度（22摄氏度）和长光照周期（LD 16:8）下最高。对照动物的附睾脂肪垫在任何一种温度下都会因短光照周期而持续增加。在松果体切除动物中，它们会因任何一种光照周期下的温度降低而增加，而在失明动物中则会减少。几种环境下的总体重增加与脂肪垫重量没有直接相关性。对照动物中的游离甲状腺素（T4）水平似乎与脂肪垫重量呈负相关。在失明、松果体切除的动物中，温度或光照周期对T4水平和脂肪垫均无影响。数据表明温度、光照和松果体在体重、脂肪沉积和血清T4方面存在复杂的相互作用。
