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Selection for high and low oxygen consumption‐induced differences in maintenance energy requirements of mice
Author(s) -
Darhan Hongyu,
Kikusato Motoi,
Toyomizu Masaaki,
Roh Sanggun,
Katoh Kazuo,
Sato Masahiro,
Suzuki Keiichi
Publication year - 2017
Publication title -
animal science journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.606
H-Index - 38
eISSN - 1740-0929
pISSN - 1344-3941
DOI - 10.1111/asj.12740
Subject(s) - selection (genetic algorithm) , oxygen , consumption (sociology) , energy requirement , energy consumption , computer science , business , reliability engineering , chemistry , biology , statistics , mathematics , engineering , artificial intelligence , ecology , art , aesthetics , organic chemistry , regression
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.