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首页> 外文期刊>ICES Journal of Marine Science >Comparison of daily- and annual- increment counts in otoliths of bigeye (Thunnus obesus), yellowfin (T. albacares), southern bluefin (T. maccoyii) and albacore (T. alalunga) tuna
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Comparison of daily- and annual- increment counts in otoliths of bigeye (Thunnus obesus), yellowfin (T. albacares), southern bluefin (T. maccoyii) and albacore (T. alalunga) tuna

机译：大眼金枪鱼（Thunnus obesus），黄鳍金枪鱼（T. albacares），南部蓝鳍金枪鱼（T. maccoyii）和长鳍金枪鱼（T. alalunga）金枪鱼耳石的每日和年度增量计数的比较

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摘要

Information on the age of individuals is often required for models assessing the status of stocks. Techniques used to estimate age of tuna have varied across species and agencies, precluding meta-analyses of age and growth. We compared age estimates obtained from commonly used ageing techniques for four important tuna species: bigeye tuna, yellowfin tuna, southern bluefin tuna, and albacore tuna. Estimates of age from counts of annual increments in transverse-sectioned otoliths were generally higher than those from counts of daily increments in transverse and longitudinal sections for all species, particularly for fish older than two years. However, annual counts produced younger estimates, on average, relative to daily counts for bigeye and yellowfin tuna younger than one year. Estimates derived from daily increments in longitudinal and transverse sections were generally similar, although longitudinal sections produced relatively older age estimates for individuals older than two years. A linear or non-linear increase in the magnitude of differences between ageing methods was the best-approximating model in all cases except when comparing daily-increment counts between transverse and longitudinal otolith sections for southern bluefin tuna. These observations are consistent with a narrowing of daily increments with increasing age, resulting in underestimates of age relative to those derived from annual increments. We conclude that (ⅰ) daily increments are unsuitable for ageing individuals over two years, especially for southern bluefin and albacore, (ⅱ) longitudinal sections are more precise and produce older age estimates than transverse sections for daily-age estimates, (ⅲ) there are considerable differences in these trends between species, likely dependent on longevity, and (ⅳ) parameter estimates and/or conclusions based on meta-analyses using age data derived from different ageing methods are likely confounded with methodological biases. This result demonstrates that greater effort is required to provide consistent, validated methods for routine age determination to support the assessment and management of these valuable populations.
机译：评估存货状况的模型通常需要有关个人年龄的信息。用于估计金枪鱼年龄的技术因物种和机构而异，其中不包括年龄和生长的荟萃分析。我们比较了从常用老化技术获得的四种重要金枪鱼种类的年龄估计值：大眼金枪鱼，黄鳍金枪鱼，南部蓝鳍金枪鱼和长鳍金枪鱼。对于所有物种，特别是对于两年以上的鱼类，根据横切耳石的年增量计数估算的年龄普遍高于根据横切面和纵切面每日增量计数的年龄。但是，相对于小于一年的大眼金枪鱼和黄鳍金枪鱼的每日计数，平均年计数得出的平均值更年轻。从纵向和横向截面的每日增量得出的估算值大致相似，尽管纵向截面对年龄大于2岁的人的年龄估算相对较高。在所有情况下，除比较南部蓝鳍金枪鱼的横向和纵向耳石部分之间的日增重计数外，在所有情况下，老化方法之间差异的线性或非线性增加都是最佳近似模型。这些观察结果与随着年龄增长的日增量的缩小相一致，导致相对于从年增量中得出的年龄而言，年龄被低估了。我们得出的结论是（ⅰ）年龄增长不适合两年以上的个体，特别是对于南部蓝鳍金枪鱼和长鳍金枪鱼；（ⅱ）纵切面比横切面更精确，并且比横切面能提供更大的年龄估计，（ⅲ）在那里物种之间这些趋势的差异很大，很可能取决于寿命，并且（ⅳ）参数估计和/或基于荟萃分析得出的结论，使用基于不同衰老方法的年龄数据得出的结论可能与方法学上的偏差相混淆。该结果表明，需要做出更大的努力来提供一致的，经过验证的常规年龄确定方法，以支持对这些宝贵人群的评估和管理。

著录项

  • 来源
    《ICES Journal of Marine Science》 |2013年第7期|1439-1450|共12页
  • 作者

    Ashley J. Williams; Bruno M. Leroy; Simon J. Nicol; Jessica H. Farley; Naomi P. Clear; Kyne Krusic-Golub; Campbell R. Davies;

  • 作者单位

    Oceanic Fisheries Programme, Secretariat of the Pacific Community, BP D5, 98848 Noumea, New Caledonia;

    Oceanic Fisheries Programme, Secretariat of the Pacific Community, BP D5, 98848 Noumea, New Caledonia;

    Oceanic Fisheries Programme, Secretariat of the Pacific Community, BP D5, 98848 Noumea, New Caledonia;

    Wealth from Oceans Flagship, CSIRO Marine and Atmospheric Research, CPO Box 7538, Hobart, Tasmania 7001, Australia;

    Wealth from Oceans Flagship, CSIRO Marine and Atmospheric Research, CPO Box 7538, Hobart, Tasmania 7001, Australia;

    Fish Ageing Services, PO Box 396, Portarlington, Victoria 3223, Australia;

    Wealth from Oceans Flagship, CSIRO Marine and Atmospheric Research, CPO Box 7538, Hobart, Tasmania 7001, Australia;

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  • 正文语种 eng
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  • 关键词

    age estimation; annual increments; daily increments; Pacific Ocean; sectioned otoliths; tuna;

    机译：年龄估计;年度增量;每日增量;太平洋;耳石金枪鱼;

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