title: Natural selection for energetic efficiency and the relationship between activity level and mortality.
mesh_terms: D000818:Animals; D005075:Biological Evolution; D004734:Energy Metabolism; D008017:Life Expectancy; D008124:Locomotion; D011336:Probability; D012487:Salmonidae / Q000502:physiology*; D014337:Trout / Q000502:physiology*