Lifespan, longevity, and ageing
Maximum longevity: 13 years (wild) Observations: Like in many other salmonid species, most animals die after spawning (Patnaik et al. 1994). While most animals return to spawn in rivers, however, there are alternative life histories: parr and jacks have a small body size and mature early, yet while jacks return early to spawn from the ocean, parr never migrate and can survive reproduction and breed again (Hutchings and Myers 1994). Unverified estimates suggest these animals may live up to 14 years (http://www.fishbase.org/).+p Interestingly, one study showed that animals infected with a Pearl mussel parasite live longer, have a lower cancer incidence, and avoid the typical "programmed death" that follows reproduction possibly because the parasite needs the salmon to live one more year to complete its life cycle (Ziuganov 2005).
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