Extreme longevity in a deep-sea vestimentiferan tubeworm and its implications for the evolution of life history strategies
Extreme longevity in a deep-sea vestimentiferan tubeworm and its implications for the evolution of life history strategies
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DOI：
10.1007/s00114-017-1479-z
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发表时间：
2017-08-01
影响因子：
1.8
通讯作者：
Cordes, Erik E.
中科院分区：
文献类型：
--
作者：
Durkin, Alanna;Fisher, Charles R.;Cordes, Erik E.
深海是许多物种的家园，这些物种的寿命比浅水物种长。这种趋势主要与代谢率随着温度的升高而下降有关。然而，在半深海深处，冷渗漏的vstientiferan管虫物种LamelLibrchia luymesi和Seepophila jones i达到了极高的年龄，超出了通过简单地根据身体大小和温度来衡量寿命的预测。在这里，我们使用基于原位生长速度的基于个体的模型来表明，在墨西哥湾发现的另一种冷渗管蠕虫--片状Escapia laminata--也有非常长的寿命，通常达到100-200岁，有些个体超过300岁。涉及死亡率和招聘率的个人模拟和整体模拟结果的分布支持这些年龄估计。采集种群的低死亡率为0.67%，与鲁伊默斯管虫和琼氏管虫的死亡率相似，在冷渗管虫的长寿命进化中发挥了作用。这些结果支持长寿理论，该理论指出，在没有外部死亡威胁的情况下，自然选择将选择衰老速度较慢并在晚年继续繁殖的个体。
The deep sea is home to many species that have longer life spans than their shallow-water counterparts. This trend is primarily related to the decline in metabolic rates with temperature as depth increases. However, at bathyal depths, the cold-seep vestimentiferan tubeworm species Lamellibrachia luymesi and Seepiophila jonesi reach extremely old ages beyond what is predicted by the simple scaling of life span with body size and temperature. Here, we use individual-based models based on in situ growth rates to show that another species of cold-seep tubeworm found in the Gulf of Mexico, Escarpia laminata, also has an extraordinarily long life span, regularly achieving ages of 100-200 years with some individuals older than 300 years. The distribution of results from individual simulations as well as whole population simulations involving mortality and recruitment rates support these age estimates. The low 0.67% mortality rate measurements from collected populations of E. laminata are similar to mortality rates in L. luymesi and S. jonesi and play a role in evolution of the long life span of cold-seep tubeworms. These results support longevity theory, which states that in the absence of extrinsic mortality threats, natural selection will select for individuals that senesce slower and reproduce continually into their old age.