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首页> 外文期刊>Marine biology >Growth and longevity of Lithophaga lithophaga: what can we learn from shell structure and stable isotope composition?
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Growth and longevity of Lithophaga lithophaga: what can we learn from shell structure and stable isotope composition?

机译：Lithophaga lithophaga的生长和寿命：我们可以从壳结构和稳定的同位素组成中学到什么？

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摘要

Longevity of bivalves has been an intriguing issue, especially for those species of interest for human consumption. Reliable age and growth estimates often require the combination of several methods. In this study, we analyzed changes in shell structure including ridges on the external shell surface and growth lines observed in acetate peel replicas of shell sections of the European date mussel Lithophaga lithophaga, as well as the oxygen and carbon isotope values (delta O-18 and delta C-13) of the shell. High variations in growth rates between individuals were noted. Ontogenetic ages of analyzed shells varied from 10 to 54 years (30.6-93.6 mm). According to results of generalized von Bertalanffy growth function, L-infinity was 107.6 mm, and k was 0.03 year(-1). delta O-18 results strongly suggest that growth ridges visible on the external shell surface of L. lithophaga are formed annually. The delta O-18 values ranged from -0.2 to 2.7 aEuro degrees (aEuro degrees), which equates to a temperature range of 13 degrees C. The reconstructed seawater temperatures (T (delta 18Oshell)) ranged between 12 and 25 degrees C, a range in good agreement with measured temperature. Stable carbon isotope values decreased through ontogeny and ranged between -2.05 and 2.32 parts per thousand (aEuro degrees). Results of this study provide the first stable isotope data for L. lithophaga shells and show the potential of this species as a geochemical sclerochronological archive.
机译：双壳类动物的寿命一直是一个引人入胜的问题，特别是对于那些人类食用感兴趣的物种而言。可靠的年龄和生长估计通常需要多种方法的组合。在这项研究中，我们分析了壳结构的变化，包括在欧洲枣贻贝Lithophaga lithophaga的壳部分的醋酸盐复本中观察到的壳表面上的脊和生长线，以及氧和碳同位素值（δO-18和C-13）。注意到个体之间的生长率差异很大。被分析的贝壳的个体发育年龄从10到54岁（30.6-93.6毫米）不等。根据广义von Bertalanffy增长函数的结果，L-无穷大为107.6 mm，k为0.03年（-1）。 δO-18的结果强烈表明，每年在石斑鱼壳表面上可见的生长脊形成。 O-18的变化范围是-0.2至2.7 aEuro度（aEuro度），相当于13摄氏度的温度范围。重建的海水温度（T（δ18Oshell））在12至25摄氏度之间，范围与测得的温度良好吻合。稳定的碳同位素值在整个个体发育过程中都下降了，范围在每千分之一（aEuro度）-2.05至2.32之间。这项研究的结果为石斑鱼壳提供了第一个稳定的同位素数据，并显示了该物种作为地球化学年代学档案的潜力。

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  • 来源
    《Marine biology》 |2015年第8期|1531-1540|共10页
  • 作者

    Peharda Melita; Puljas Sanja; Chauvaud Laurent; Schoene Bernd R.; Ezgeta-Balie Daria; Thebault Julien;

  • 作者单位

    Inst Oceanog & Fisheries, Split 21000, Croatia;

    Univ Split, Fac Sci, Split, Croatia;

    Univ Brest, Inst Univ Europeen Mer, Lab Sci Environm Marin, LEMAR UMR6539 UBO CNRS IRD, F-29280 Plouzane, France;

    Johannes Gutenberg Univ Mainz, Earth Syst Sci Res Ctr, Inst Geosci, D-55128 Mainz, Germany;

    Inst Oceanog & Fisheries, Split 21000, Croatia;

    Univ Brest, Inst Univ Europeen Mer, Lab Sci Environm Marin, LEMAR UMR6539 UBO CNRS IRD, F-29280 Plouzane, France;

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