Titlebook: Hibernation and the Hypothalamus; Nicholas Mrosovsky Book 1971 Meredith Corporation 1971 Hibernation.behavior.biological.biology.informati

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2否定

nominal

Hibernation and the Hypothalamus, Their body weights show corresponding fluctuations. Water intake generally parallels food intake. Reproduction does not normally occur in the winter, and there is a seasonal atrophy of the gonads and of various other glands. Kayser (1961) lists such endocrine changes and also weight loss as useful in characterizing a species as a hibernator.

TOM

Hypothalamic Plasticity,amirez and McCann (1963) found that luteinizing hormone (LH) releasing factor is present in hypothalamic extracts even of immature rats, and that plasma LH rises following gonadectomy at this stage also.

Interferons

Freeze

Adrenaline

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The Medial Hypothalamus and Prehibernation Obesity: A Theory Based on Behavioral Tests,ow there are periods of augmented food intake that correspond to the period of prehibernation fat accumulation (Sept. 4 to Oct. 24) in natural populations (Mayer, 1954).. In golden-mantled ground squirrels caught in the wild, there is a three-fold increase in the lipid index during the month of August (Jameson and Mead, 1964; and see Fig. 3).

coltish

The Conditions for Torpor, temperature and controlling it during hibernation. The nature of these mechanisms and their probable location in the anterior hypothalamus was the subject of the last chapter. Now it is necessary to face up to the unpredictability of when these mechanisms will operate.

Pelago

Book 1971opposite view. It argues that the physiological achievements of hibernators do not deEend on special mechanisms but on special use of ordinary mechanisms. It is precisely this that makes the hibernators important. If the hibernators de- pend on some unique physiological principle their study is that