Interactions between parental traits, environmental harshness and growth rate in determining telomere length in wild juvenile salmon.

作者: D. McLennan , J. D. Armstrong , D. C. Stewart , S. Mckelvey , W. Boner

DOI: 10.1111/MEC.13857

关键词:

摘要: A larger body size confers many benefits, such as increased reproductive success, ability to evade predators and competitive social status. However, individuals rarely maximize their growth rates, suggesting that this carries costs. One cost could be faster attrition of the telomeres cap ends eukaryotic chromosomes play an important role in chromosome protection. relatively short telomere length is indicative poor biological state, including poorer tissue organ performance, reduced potential longevity disease susceptibility. Telomere loss during may also accelerated by environmental factors, but these have been subjected experimental manipulation natural environment. Using a wild system involving manipulations juvenile Atlantic salmon Salmo salar Scottish streams, we found fish was influenced parental traits direct effects. We faster-growing had shorter there greater (in terms length) if occurred harsher positive association between offspring history fathers (but not mothers), represented number years spent at sea. This suggests long-term consequences conditions life for individual longevity.

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