Energy metabolism, thermoregulation and water budget in the slow loris (Nycticebus coucang, boddaert 1785)

Müller, Ewald F

doi:10.1016/0300-9629(79)90438-9

Cited by 100 publications

(37 citation statements)

References 33 publications

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“…In a single individual compared with a control animal, expression of UCP seemed to be increased by cold exposure (7°C). Animals treated with the highest dose of isoproterenol kept an extremely high MR for 70 min and showed a cooling response involving intense sweating, panting, and salivation as already found in a strepsirhine primate submitted to high ambient temperatures (32).…”

Section: Discussionsupporting

confidence: 59%

Brown fat and nonshivering thermogenesis in the gray mouse lemur (Microcebus murinus)

Génin

Nibbelink

Galand

et al. 2003

American Journal of Physiology-Regulatory, Integrative and Comp

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The gray mouse lemur Microcebus murinus is a rare example of a primate exhibiting daily torpor. In captive animals, we examined the metabolic rate during arousal from torpor and showed that this process involved nonshivering thermogenesis (NST). Under thermoneutrality (28°C), warming-up from daily torpor (body temperature <33°C) involved a rapid (<5 min) increase of O2 consumption that was proportional to the depth of torpor ( n = 8). The injection of a β-adrenergic agonist (isoproterenol) known to elicit NST induced a dose-dependent increase in metabolic rate ( n = 8). Moreover, maximum thermogenesis was increased by cold exposure. For the first time in this species, anatomic and histological examination using an antibody against uncoupling protein (UCP) specifically demonstrated the presence of brown fat. With the use of Western blotting with the same antibody, we showed a likely increase in UCP expression after cold exposure, suggesting that NST is also used to survive low ambient temperatures in this tropical species.

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Section: Discussionsupporting

confidence: 59%

Brown fat and nonshivering thermogenesis in the gray mouse lemur (Microcebus murinus)

Génin

Nibbelink

Galand

et al. 2003

American Journal of Physiology-Regulatory, Integrative and Comp

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“…However, there is much evidence to suggest that the level of basal metabolism and body temperature regulation of an animal are closely related to the degree of thermal stability and food availability of its environment, rather than phylogenetic status . For instance, the majority of tropical mammals exhibit hypometabolism and a certain degree of lability in body temperature (Muller 1979). The results obtained for body temperature in this study confirm the statement by Dobler (1976) that, within the Lorisidae, the galagos attain the highest degree of homeothermy.…”

Section: Discussionsupporting

confidence: 86%

“…1989,24(2) manner except that temperatures above 28°C lead to a marked increase in body temperature (Muller & Jaksche 1980). In the slow loris and potto rectal temperature was highly variable, several degrees lower than in guinea pigs, cats and rabbits and showed a distinct correlation to the activity pattern of the animal (Hildwein & Goffart 1975;Muller 1979). The ability of bushbabies to maintain body temperature at low ambient temperatures, while other Lorisidae do not, may be due to a large increase in heat production and to their dense fur which offers excellent insulation.…”

Section: Discussionmentioning

confidence: 96%

“…In addition, body temperature is generally lower than in mammals of similar size and follows a marked circadian rhythm (Muller 1979). These features, and phenomena such as lethargic states (characteristics of certain Malagasy lemurs), have long been considered indicative of an inadequate thermoregulatory system reflecting the primitive state of the group.…”

Section: Discussionmentioning

confidence: 99%

“…Studies on other prosimian species have revealed that they share several physiological peculiarities, namely hypometabolism, a labile body temperature, intolerance to heat and a surprising ability to withstand low ambient temperatures (Muller 1979). Considering the phylogenetic status of the group, there has been much speculation as to whether these features indicate a poor thermoregulatory capacity or are, in fact, adaptations to the different • habitats in which these animals are found.…”

mentioning

confidence: 99%

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Thermoregulation and energy metabolism in the lesser bushbaby,Galago senegalensis moholi

Knox¹,

Wright

1989

South African Journal of Zoology

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Rate of metabolism in the smallest simian primate, the pygmy marmoset (Cebuella pygmaea)

1997

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Rate of metabolism was measured with six adult pygmy marmosets (Cebuella pygmaea) at regulated ambient temperatures ranging between 20°C and 35°C. A novel combined nest box and metabolic chamber was designed to allow nighttime measurements on immobile animals in their home cage without disturbance. The basal rate of metabolism (BMR) was 98 ml O2 h−1, representing 74% of the value expected from the equation of McNab [Quarterly Review of Biology 63:25–54, 1988] relative to body mass. The thermoneutral zone was approximately 27–34°C. Below the lower critical temperature (27–28°C), thermal conductance (12.9 ml O2 h−1 °C−1) was close to the predicted value. Body temperature ranged between 34.9°C and 35.5°C at night. When two animals rested together overnight in the nest box, the lower critical temperature was slightly lowered, and individual energy expenditure at 20–21°C was reduced by about 34%. The basal rate of metabolism of C. pygmaea is much lower than reported in an earlier study based on daytime measurements but agrees with values reported from a more recent study conducted at night with a classical metabolic chamber. In order to compare the BMR of C. pygmaea with that of other primates, 23 species were included in a comparative study taking into account both phylogeny and body mass (independent contrasts approach). The scaling exponent of BMR to body mass obtained was indistinguishable from that published for eutherian mammals in general. Cebuella and Callithrix exhibit the lowest basal rates known for simians. This trait may possibly be linked to the natural diet, which includes a large proportion of gums that are difficult to digest, but additional metabolic studies on primates are needed for further examination of its adaptive significance. Am. J. Primatol. 41:229–245, 1997. © 1997 Wiley‐Liss, Inc.

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Energy metabolism, thermoregulation and water budget in the slow loris (Nycticebus coucang, boddaert 1785)

Cited by 100 publications

References 33 publications

Brown fat and nonshivering thermogenesis in the gray mouse lemur (Microcebus murinus)

Brown fat and nonshivering thermogenesis in the gray mouse lemur (Microcebus murinus)

Thermoregulation and energy metabolism in the lesser bushbaby,Galago senegalensis moholi

Rate of metabolism in the smallest simian primate, the pygmy marmoset (Cebuella pygmaea)

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