title: Evolution of basal metabolic rate in bank voles from a multidirectional selection experiment.
abstract: A major theme in evolutionary and ecological physiology of terrestrial vertebrates encompasses the factors underlying the evolution of endothermy in birds and mammals and interspecific variation of basal metabolic rate (BMR). Here, we applied the experimental evolution approach and compared BMR in lines of a wild rodent, the bank vole (Myodes glareolus), selected for 11 generations for: high swim-induced aerobic metabolism (A), ability to maintain body mass on a low-quality herbivorous diet (H) and intensity of predatory behaviour towards crickets (P). Four replicate lines were maintained for each of the selection directions and an unselected control (C). In comparison to C lines, A lines achieved a 49% higher maximum rate of oxygen consumption during swimming, H lines lost 1.3 g less mass in the test with low-quality diet and P lines attacked crickets five times more frequently. BMR was significantly higher in A lines than in C or H lines (60.8, 56.6 and 54.4 ml O2 h(-1), respectively), and the values were intermediate in P lines (59.0 ml O2 h(-1)). Results of the selection experiment provide support for the hypothesis of a positive association between BMR and aerobic exercise performance, but not for the association of adaptation to herbivorous diet with either a high or low BMR.
authors: Institute of Environmental Sciences, Jagiellonian University, ul. Gronostajowa 7, Kraków 30-387, Poland.
authors: Edyta T
authors: ET
authors: Sadowska
authors: Institute of Environmental Sciences, Jagiellonian University, ul. Gronostajowa 7, Kraków 30-387, Poland.
authors: Clare
authors: C
authors: Stawski
authors: Institute of Environmental Sciences, Jagiellonian University, ul. Gronostajowa 7, Kraków 30-387, Poland.
authors: Agata
authors: A
authors: Rudolf
authors: Institute of Environmental Sciences, Jagiellonian University, ul. Gronostajowa 7, Kraków 30-387, Poland.
authors: Geoffrey
authors: G
authors: Dheyongera
authors: Institute of Environmental Sciences, Jagiellonian University, ul. Gronostajowa 7, Kraków 30-387, Poland.
authors: Katarzyna M
authors: KM
authors: Chrząścik
authors: Institute of Environmental Sciences, Jagiellonian University, ul. Gronostajowa 7, Kraków 30-387, Poland.
authors: Katarzyna
authors: K
authors: Baliga-Klimczyk
authors: Institute of Environmental Sciences, Jagiellonian University, ul. Gronostajowa 7, Kraków 30-387, Poland pawel.koteja@uj.edu.pl.
authors: Paweł
authors: P
authors: Koteja
mesh_terms: D000818:Animals; D003411:Arvicolinae / Q000235:genetics / Q000502:physiology*; D001481:Basal Metabolism; D005075:Biological Evolution; D004032:Diet; D005247:Feeding Behavior; D020387:Food Chain; D006135:Gryllidae; D011235:Predatory Behavior; D012641:Selection, Genetic; D013550:Swimming
keywords: aerobic metabolism; endothermy; experimental evolution; food habits