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首页> 外文期刊>ICES Journal of Marine Science >Ageing bias and precision for deep-water snappers: evaluating nascent otolith preparation methods using novel multivariate comparisons among readers and growth parameter estimates
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Ageing bias and precision for deep-water snappers: evaluating nascent otolith preparation methods using novel multivariate comparisons among readers and growth parameter estimates

机译：深水鲷鱼的老化偏差和精度：使用新型的多变量读者比较方法和生长参数估算方法评估新生耳石的制备方法

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摘要

Tropical deep-water snappers (Etelinae) support valuable fisheries across the Indo-Pacific, with stock assessments reliant on age-based information in the absence of reliable catch and effort statistics. These long-lived species have been considered notoriously difficult to age. However, nascent developments in ageing protocols, particularly thinner transverse sections of otoliths (similar to 180-200 mu m), are providing improvements in growth zone clarity, interpretation and repeatability of annuli counts. At a recent international workshop, thin sectioned otoliths from three deep-water snappers were read under reflected light by eight fisheries scientists from across the Indo-Pacific, with various levels of fish-ageing experience. Precision and bias were assessed using traditional ageing precision metrics (index of average percent error, IAPE; and coefficient of variation, CV), and a novel approach using multivariate analyses (metric multidimensional scaling, mMDS) based on Euclidean dissimilarity among readers' counts and subsequent von Bertalanffy (vB) growth parameter estimates. Annuli counts between the primary reader and all other readers were within two for 80% of estimates, with uniform variation across a wide age range for Etelis carbunculus (intraclass correlation coefficient (ICC) = 0.924, n = 20, 3-25 annuli) and Etelis sp. (ICC = 0.933, n = 15, 2-27 annuli). In contrast, annuli counts for Pristipomoides filamentosus (n = 14, 4-49) were less precise (i.e. ICC = 0.835, 66% of counts within two of primary reader) with a bias toward greater variation in younger, pre-maturational life stages (<= 5 annuli). Traditionally accepted ageing precision (IAPE <= 5.5%, CV <= 7.6%) was achieved for each species, but was commensurate with reader experience. The multivariate mMDS ordination was more informative in identifying both distance (i.e. dissimilarity) and direction (i.e. form) of variations in annuli counts and vB growth parameter estimates among readers. The acceptable level of ageing precision and bias achieved among most readers indicated that deep-water snappers can be aged precisely when appropriate otolith preparation methods are used. This study contributes towards ageing protocols that can be used
机译：热带深水鲷鱼（Etelinae）支持整个印度太平洋的宝贵渔业，在缺乏可靠的捕捞量和努力量统计数据的情况下，种群评估依赖于基于年龄的信息。这些长期存在的物种被认为很难老化。然而，老化协议的新生发展，尤其是耳石的横截面更薄（类似于180-200μm），正在改善生长区的清晰度，环形计数的解释和可重复性。在最近的一次国际研讨会上，来自印度洋和太平洋地区的八位渔业科学家在反射光下读取了三只深水鲷鱼的薄片耳石，这些鱼类具有不同水平的鱼龄经验。使用传统的老化精度度量标准（平均百分比误差指数，IAPE；变异系数，CV），以及基于读者计数和结果之间的欧几里德差异的多元分析（度量多维标度，mMDS）的新方法，评估了精度和偏差。随后的von Bertalanffy（vB）生长参数估计。主要阅读者和所有其他阅读者之间的年鉴计数在80％的估计值之内，在两个数之内，并且在很宽的年龄范围内，伊特里氏小孢子的变异均匀（类内相关系数（ICC）= 0.924，n = 20，3-25环）和Etelis sp。 （ICC = 0.933，n = 15，2-27环）。相比之下，Pristipomoides silkosus（n = 14，4-49）的瓣膜计数精确度较低（即，ICC = 0.835，两个主要阅读器中的计数的66％），并且偏向于较年轻的，成熟前的生活阶段（<= 5环形）。每个物种均达到了传统上公认的老化精度（IAPE <= 5.5％，CV <= 7.6％），但与读者的经验相称。多变量mMDS排序在识别读者之间瓣环计数和vB生长参数估计值的变化的距离（即，不相似性）和方向（即，形式）方面更具信息性。在大多数读者中，老化精度和偏差达到可接受的水平，这表明当使用适当的耳石制备方法时，深水鲷鱼可以精确老化。这项研究有助于可使用的老化协议

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  • 来源
    《ICES Journal of Marine Science》 |2017年第1期|193-203|共11页
  • 作者

    Wakefield Corey B.; OMalley Joseph M.; Williams Ashley J.; Taylor Brett M.; Nichols Ryan S.; Halafihi Tuikolongahau; Humphreys Robert L. Jr.; Kaltavara Jeremie; Nicol Simon J.; Newman Stephen J.;

  • 作者单位

    Govt Western Australia, Dept Fisheries, Western Australian Fisheries & Marine Res Labs, POB 20, North Beach, WA 6920, Australia|Curtin Univ, Dept Environm & Agr, GPO Box U1987, Perth, WA 6845, Australia;

    NOAA Fisheries, Pacific Isl Fisheries Sci Ctr, 1845 Wasp Blvd,Bldg 176, Honolulu, HI 96818 USA;

    Pacific Community SPC, Ocean Fisheries Programme, BP D5, Noumea 98848, New Caledonia|James Cook Univ, Coll Marine & Environm Sci, Ctr Sustainable Trop Fisheries & Aquaculture, Townsville, Qld, Australia;

    Univ Hawaii Manoa, Joint Inst Marine & Atmospher Res, Honolulu, HI 96822 USA;

    NOAA Fisheries, Pacific Isl Fisheries Sci Ctr, 1845 Wasp Blvd,Bldg 176, Honolulu, HI 96818 USA;

    Minist Agr & Food Forests & Fisheries, POB 871, Nukualofa, Tonga;

    NOAA Fisheries, Pacific Isl Fisheries Sci Ctr, 1845 Wasp Blvd,Bldg 176, Honolulu, HI 96818 USA;

    Minist Agr Livestock Forestry Fisheries & Biosecu, Vanuatu Fisheries Dept, PMB 9045, Port Vila, Vanuatu;

    Pacific Community SPC, Ocean Fisheries Programme, BP D5, Noumea 98848, New Caledonia|Univ Canberra, Inst Appl Ecol, Canberra, ACT 2602, Australia;

    Govt Western Australia, Dept Fisheries, Western Australian Fisheries & Marine Res Labs, POB 20, North Beach, WA 6920, Australia|Curtin Univ, Dept Environm & Agr, GPO Box U1987, Perth, WA 6845, Australia;

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  • 正文语种 eng
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  • 关键词

    Lutjanidae; Etelinae; thin transverse sections; sagittal; opaque zone counts; fish ageing error;

    机译：Lutjanidae;Etelinae;细横切面;矢状;不透明带数;鱼体老化误差;

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