title: Selection for high and low oxygen consumption-induced differences in maintenance energy requirements of mice.
abstract: Maintenance energy requirements (MER) of mice selected for high (H) or low (L) oxygen consumption (OC) were compared. Forty-four mice from H and L OC lines were weaned at 3 weeks and divided into four experimental groups: group A were sacrificed at 4 weeks; group B were fed ad libitum, and groups C and D were fed 2.8 and 2.4 g/day, respectively, from 4 to 8 weeks of age. Groups B-D were sacrificed at 8 weeks. Chemical components were estimated for all groups. MER was estimated using a model that partitioned metabolizable energy intake into that used for maintenance, and protein and fat deposition. The feed conversion ratio for the B group was significantly higher in the H than in the L line. Feed intake for metabolic energy content per metabolic body size was significantly also higher in the H line, whereas accumulated energy content per metabolic body size was significantly higher in the L line. MER of the H line was greater than that of the L line (P < 0.10). These results suggest that selection for H or L OC produced differences in chemical components, feed efficiency, and MER between the H and L lines.
authors.affiliation: Laboratory of Animal Breeding and Genetics, Graduate School of Agricultural Science, Faculty of Agriculture, Tohoku University, Sendai, Japan.
authors.forename: Hongyu
authors.initials: H
authors.lastname: Darhan
authors.affiliation: Laboratory of Animal Nutritional Biochemistry, Graduate School of Agricultural Science, Faculty of Agriculture, Tohoku University, Sendai, Japan.
authors.forename: Motoi
authors.initials: M
authors.lastname: Kikusato
authors.affiliation: Laboratory of Animal Nutritional Biochemistry, Graduate School of Agricultural Science, Faculty of Agriculture, Tohoku University, Sendai, Japan.
authors.forename: Masaaki
authors.initials: M
authors.lastname: Toyomizu
authors.affiliation: Laboratory of Animal physiology, Graduate School of Agricultural Science, Faculty of Agriculture, Tohoku University, Sendai, Japan.
authors.forename: Sang-Gun
authors.initials: SG
authors.lastname: Roh
authors.affiliation: Laboratory of Animal physiology, Graduate School of Agricultural Science, Faculty of Agriculture, Tohoku University, Sendai, Japan.
authors.forename: Kazuo
authors.initials: K
authors.lastname: Katoh
authors.affiliation: Laboratory of Animal Breeding and Genetics, Graduate School of Agricultural Science, Faculty of Agriculture, Tohoku University, Sendai, Japan.
authors.forename: Masahiro
authors.initials: M
authors.lastname: Sato
authors.affiliation: Laboratory of Animal Breeding and Genetics, Graduate School of Agricultural Science, Faculty of Agriculture, Tohoku University, Sendai, Japan.
authors.forename: Keiichi
authors.initials: K
authors.lastname: Suzuki
mesh_terms: D000818:Animals; D049628:Body Size; D004435:Eating / Q000502:physiology; D002149:Energy Intake / Q000502:physiology*; D004734:Energy Metabolism; D050356:Lipid Metabolism; D008815:Mice, Inbred Strains; D010101:Oxygen Consumption / Q000502:physiology*; D011506:Proteins / Q000378:metabolism
chemical_list: D011506:Proteins
keywords: maintenance energy requirement; mice; oxygen consumption; selection