Annual performance measurements, age structures of female pig inventories, and by-parity culling rates were abstracted from data files of 110 herds that participated in a data-share program in Japan. Parity at culling was used as a prime measurement of longevity, whereas pigs weaned x mated female(-1) x year(-1) (PWMFY) was a prime measurement of reproductive efficiency. High or low longevity h...

More than 100 years ago, Max Rubner combined the fact that both metabolic rate and longevity of mammals varies with body size to calculate that "life energy potential" (lifetime energy turnover per kilogram) was relatively constant. This calculation linked longevity to aerobic metabolism which in turn led to the "rate-of-living" and ultimately the "oxidative stress" theories of aging. However, ...

OBJECTIVES To assess whether familial longevity can be attributed to sustained hematopoietic capacity. DESIGN Prospective follow-up study of two independent population-based cohorts. SETTING The Leiden Longevity Study and the Leiden 85-plus Study. PARTICIPANTS From the Leiden Longevity Study, 1,001 nonagenarians with familial longevity were included. As age-matched controls, 260 nonagenar...