Most research on life span and aging has been based on captive populations of short-lived animals; however, we know very little about the expression of these traits in wild populations of such organisms. Because life span and aging are major components of fitness, the extent to which the results of many evolutionary studies in the laboratory can be generalized to natural settings depends on the...

When escapee farmed Atlantic salmon Salmo salar interbreed with wild fish, the introgression of maladaptive genes can lower population productivity and alter key life history traits. To date, only a few European studies have compared wild, farm, hybrid under common conditions in isolating influence genetics on survival fitness-related Here, we examined performance experimentally derived fry fro...

In polygynous primates, a greater reproductive variance in males have been linked to their reduced life expectancy relative to females. The mortality patterns of monogamous pair-bonded primates, however, are less clear. We analyzed the sex differences in mortality within wild (NMales  = 70, NFemales  = 73) and captive (NMales  = 25, NFemales  = 29) populations of Azara's owl monkeys (Aotus azar...