Evaluation of Techniques for Age determination of Fresh water Mussels (Unionidae)
Evaluation of Techniques for Age determination of Fresh water Mussels (Unionidae)
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淡水贻贝（贻贝科）年龄测定技术评价
DOI：
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发表时间：
1988
期刊：
影响因子：
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通讯作者：
S. Moyer
中科院分区：
文献类型：
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作者：
R. Neves;S. Moyer
年龄验证和评估的四个年龄测定技术，壳灰化，薄切片，醋酸皮，和外部生长带的计数，进行了几种淡水贻贝（蚌科）在弗吉尼亚州西南部。在一至三年后，四个物种的标记和标记标本的恢复证实了每年在壳上和壳内形成一个独特的环。瓣膜的薄切片是最有效的老化技术，并提供了高度的准确性和精密度。贝壳灰化是完全不可靠的，醋酸酯皮是低于薄切片。通常使用的计算贝壳外部生长带的方法总是低估了较老标本的年龄，并且在珠蚌类的年龄测定中使用有限。
Age validation and an assessment of four age determination techniques; shell ashing, thin-sectioning, acetate peels, and enumeration of external growth bands, were conducted on several species of freshwater mussels (Unionidae) in southwestern Virginia. The recovery of tagged and marked specimens of four species after one to three years confirmed the formation of one distinct annulus per year on and in shells. Thin-sectioning of valves was the most effective technique for aging and provided a high degree of both accuracy and precision. Shell ashing was totally unreliable, and acetate peels were inferior to thin-sections. The commonly used method of counting external growth bands on shells consistently underestimated the ages of older specimens and is of limited use in age determination of unionids.