Selection for high and low oxygen consumption-induced differences in maintenance energy requirements of mice

Hongyu Darhan, Motoi Kikusato, Masaaki Toyomizu, Sang Gun Roh, Kazuo Katoh, Masahiro Sato, Keiichi Suzuki

Research output: Contribution to journalArticle

1 Citation (Scopus)

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.

Original languageEnglish
Pages (from-to)959-965
Number of pages7
JournalAnimal Science Journal
Volume88
Issue number7
DOIs
Publication statusPublished - 2017 Jul

Keywords

  • maintenance energy requirement
  • mice
  • oxygen consumption
  • selection

ASJC Scopus subject areas

  • Agricultural and Biological Sciences(all)

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