| quantitative morphology and environmental responses of the pineal gland in the collared lemming (dicrostonyx groenlandicus). | collared lemmings from churchill, manitoba, and their descendants were studied in captivity to define neuroendocrine and related histophsiological characteristics and responses, particularly in relation to photic and temperature conditions. relatively great pineal size (0.1755 +/- 0.0167 mm3, or 3.08 +/- 0.30 = pineal volume in mm3 x 10(3)/body weight in gm; n = 16) shown in this arctic rodent is consistent with the suggestion that pineal size and significance may tend to be greater in more nort ... | 1978 | 727154 |