Lifespan and growth of Astarte borealis (Bivalvia) from Kandalaksha Gulf, White Sea, Russia
Lifespan and growth of Astarte borealis (Bivalvia) from Kandalaksha Gulf, White Sea, Russia
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DOI：
10.1007/s00300-018-2290-9
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发表时间：
2018-07-01
期刊：
影响因子：
1.7
通讯作者：
Khaitov, Vadim
中科院分区：
文献类型：
--
作者：
Moss, David K.;Surge, Donna;Khaitov, Vadim
海洋双壳类以其令人印象深刻的寿命而闻名。像树木一样，双壳类也是通过增长来生长的，在它们的壳中记录了整个个体发育过程中的年龄和大小。然而，双壳类可以根据当地的环境以几个不同的周期形成生长增量。因此，建立海洋双壳类的寿命和增长率，需要适当确定每年的增长增量。在这里，我们使用同位素sclerochronology破译现代Astarte borealis的增生生长记录从白色海，俄罗斯（N 67 A度05.70 '; E 32 A度40.85'）。与许多其他寒温带和北方双壳类和帽贝物种的冬季生长增量观察，显着的生长增量在A。borealis对应于氧同位素（δ O-18）时间序列中最负的值，表明它们在夏季形成。此外，夏季生长增量不符合外壳上的外部同心脊，使后者具有不可靠的年龄指标。与其他极地双壳类相似，A.北极光生长缓慢，寿命长。我们样品的von Bertalanffy生长方程为H（t）= 29.39*（1 - e（（-0.11（t-（-1.86）。这里检查的个体（n = 18）的寿命范围从16岁到48岁。鉴于其令人印象深刻的寿命和广泛的极地分布，A。在气候变化的情况下，北极熊可能是监测北冰洋和北方海环境状况的一个潜在的有价值的骨骼档案。
Marine bivalves are well known for their impressive lifespans. Like trees, bivalves grow by accretion and record age and size throughout ontogeny in their shell. Bivalves, however, can form growth increments at several different periodicities depending on their local environment. Thus, establishing lifespans and growth rates of marine bivalves requires a proper identification of annual growth increments. Here, we use isotope sclerochronology to decipher the accretionary growth record of modern Astarte borealis from the White Sea, Russia (N 67A degrees 05.70'; E 32A degrees 40.85'). Unlike winter growth increments observed in many other cold-temperate and boreal bivalve and limpet species, prominent growth increments in A. borealis corresponded to the most negative values in the oxygen isotope (delta O-18) time series indicating that they formed during summer. Furthermore, summer growth increments do not coincide with the external concentric ridges on the shell making the latter feature an unreliable indicator of age. Similar to many other polar bivalves, A. borealis shows slow growth and long life. The von Bertalanffy growth equation for our sample is H (t) = 29.39*(1 - e ((- 0.11(t-(- 1.86)))). Lifespans of individuals examined here (n = 18) range from 16 to 48 years. Given its impressive longevity and widespread polar distribution, A. borealis may be a potentially valuable skeletal archive for monitoring environmental conditions in the Arctic Ocean and boreal seas in the face of changing climate.