2003
DOI: 10.1046/j.1474-9728.2003.00061.x
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Age‐related changes in the metabolism and body composition of three dog breeds and their relationship to life expectancy

Abstract: SummaryWe measured body composition and resting metabolic rates (RMR) of three dog breeds (Papillons, mean body mass 3.0 kg ( n = 35), Labrador retrievers, mean body mass 29.8 kg ( n = 35) and Great Danes, mean body mass 62.8 kg ( n = 35)) that varied between 0.6 and 14.3 years of age. In Papillons, lean body mass (LBM) increased with age but fat mass (FBM) was constant; in Labradors, both LBM and FBM were constant with age, and in Great Danes, FBM increased with age but LBM was constant. FBM averaged 14.8% an… Show more

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Cited by 137 publications
(101 citation statements)
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“…Species that expend energy at higher rates also spend more energy over their lifetimes per gram of tissue. This result is consistent with observations within species of a positive association between metabolic intensity and longevity (Speakman et al 2003(Speakman et al , 2004Oklejewicz and Daan 2002;Lin et al 2002;van Voorhies and Ward 1999).…”
Section: Discussionsupporting
confidence: 92%
“…Species that expend energy at higher rates also spend more energy over their lifetimes per gram of tissue. This result is consistent with observations within species of a positive association between metabolic intensity and longevity (Speakman et al 2003(Speakman et al , 2004Oklejewicz and Daan 2002;Lin et al 2002;van Voorhies and Ward 1999).…”
Section: Discussionsupporting
confidence: 92%
“…Basal metabolic rate (BMR) or resting metabolic rate declines with age in humans (Roberts & Rosenberg 2006) as well as in rats (e.g. Even et al 2001), dogs (Speakman et al 2003) and some species of birds (Broggi et al 2007). However, other studies on birds, naked mole rats and mice did not report any age-related decline in BMR (see references in Moe et al 2007).…”
Section: Introductionmentioning
confidence: 99%
“…17 Secondly, Vitamin E may scavenge ROS, and ROS may be important in the aging process, but this effect might be offset by a parallel compensating impacts on the endogenous antioxidant system, or indeed on any system involved in redox status or oxidative damage, similar to those reported following vitamin C supplementation. 25,26 Thirdly, because body mass and energy metabolism affect both free-radical production and life span, 7,27,28 if vitamin E supplementation influences one or both of these factors, this could offset any potential benefits. Finally, age of initiation of supplementation may be important.…”
Section: Introduction Imentioning
confidence: 99%