Prolonged life span among endemic Gasterosteus populations
Prolonged life span among endemic Gasterosteus populations
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DOI：
10.1139/z11-133
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发表时间：
2012-02-01
期刊：
影响因子：
--
通讯作者：
Reimchen, T. E.
中科院分区：
文献类型：
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作者：
Gambling, S. J.;Reimchen, T. E.
在它们的环北方沿海分布中，三刺鱼（Gasterosteus aculeatus L.，1758）通常在1或2岁（第二或第三个夏天）繁殖，并在生殖周期的一年中死亡。从之前对加拿大西部海达群岛的一项研究延伸出来，该研究发现大型三棘鱼种群的寿命非常长（8年），我们使用骨盆脊柱环来检查另外12个种群的5条最大成年棘鱼的年龄，（45-60 mm标准长度（SL））和7个具有大型成体棘鱼（>75 mm SL）的群体。每个小体型种群的最大年龄为1或2岁，这是该分类单元的典型特征。在大体型种群中，第2年也达到成年大小，种群中的成年棘鱼年龄为3至6岁，表明寿命延长。低生产力的栖息地和避难所对缺口有限的piscivores，其中每一个理论上预测衰老率降低，与这些人群中最长寿。这些数据结合最近的全基因组序列刺鱼提供了机会，定位遗传标记延长寿命。
Throughout their circumboreal coastal distribution, the threespine stickleback (Gasterosteus aculeatus L., 1758) typically reproduce at 1 or 2 years of age (second or third summer) and die during the year of the reproductive cycle. Extending from a previous study on the Haida Gwaii archipelago, western Canada, that identified an exceptionally long life span (8 years) in a population of large-bodied threespine stickleback, we use pelvic spine annuli to examine age of the five largest adult stickleback of 12 additional populations comprising five populations with average-sized adults (45-60 mm standard length (SL)) and seven populations with large-bodied adult stickleback (>75 mm SL). Each of the small-bodied populations had a maximum age of 1 or 2 years typical for the taxon. Among the large-bodied populations, which also reached adult size in the 2nd year, adult stickleback in the populations ranged from 3 to 6 years, indicating extended longevity. Low productivity habitats and refuge against gape-limited piscivores, each of which theoretically predicts reduced rate of senescence, are associated with the greatest longevity among these populations. These data combined with the recent full genome sequence for stickleback provide opportunities for locating genetic markers for extended longevity.