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Titolo:
Energy intake and fur in summer- and winter-acclimated Siberian hamsters (Phodopus sungorus)
Autore:
Kauffman, AS; Cabrera, A; Zucker, I;
Indirizzi:
Univ Calif Berkeley, Dept Integrat Biol, Berkeley, CA 94720 USA Univ CalifBerkeley Berkeley CA USA 94720 at Biol, Berkeley, CA 94720 USA Univ Calif Berkeley, Dept Psychol, Berkeley, CA 94720 USA Univ Calif Berkeley Berkeley CA USA 94720 Psychol, Berkeley, CA 94720 USA
Titolo Testata:
AMERICAN JOURNAL OF PHYSIOLOGY-REGULATORY INTEGRATIVE AND COMPARATIVE PHYSIOLOGY
fascicolo: 2, volume: 281, anno: 2001,
pagine: R519 - R527
SICI:
0363-6119(200108)281:2<R519:EIAFIS>2.0.ZU;2-1
Fonte:
ISI
Lingua:
ENG
Soggetto:
BROWN ADIPOSE-TISSUE; DJUNGARIAN HAMSTER; PELAGE COLOR; BODY-WEIGHT; FOOD-INTAKE; NONSHIVERING THERMOGENESIS; PEROMYSCUS-LEUCOPUS; DAILY TORPOR; HEAT-LOSS; THERMOREGULATION;
Keywords:
pelage; insulation; thermoregulation; photoperiod;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
44
Recensione:
Indirizzi per estratti:
Indirizzo: Kauffman, AS Univ Calif Berkeley, Dept Integrat Biol, 3060 Valley Life SciBldg, Berkeley, CA 94720 USA Univ Calif Berkeley 3060 Valley Life Sci BldgBerkeley CA USA 94720
Citazione:
A.S. Kauffman et al., "Energy intake and fur in summer- and winter-acclimated Siberian hamsters (Phodopus sungorus)", AM J P-REG, 281(2), 2001, pp. R519-R527

Abstract

Few studies have directly addressed the impact of fur on seasonal changes in energy intake. The daily food intake of Siberian hamsters (Phodopus sungorus) was measured under simulated summer and winter conditions in intact animals and those with varying amounts of pelage removed. Energy intake increased up to 44% above baseline control values for approximately 2-3 wk after complete shaving. Increases in food intake varied with condition and weregreater in hamsters housed in short than long day lengths and at low (5 degrees C) than moderate (23 degrees C) ambient temperatures. Removal of 8 cm(2) of dorsal fur, equivalent to 30% of the total dorsal fur surface, increased food intake, but removal of 4 cm(2) had no effect. An 8-cm(2) fur extirpation from the ventral surface did not increase food consumption. Food intake was not influenced differentially by fur removal from above brown adipose tissue hot spots. Fur plays a greater role in energy balance in winter-than summer-acclimated hamsters and conserves energy under a wide range ofenvironmental conditions.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 07/04/20 alle ore 23:01:06