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首页> 外文期刊>Reviews in Fisheries Science & Aquaculture >On the Variability of the Length-Weight Relationship for Atlantic Bluefin Tuna, Thunnus thynnus (L.)
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On the Variability of the Length-Weight Relationship for Atlantic Bluefin Tuna, Thunnus thynnus (L.)

机译：大西洋蓝鳍金枪鱼（Thunnus thynnus（L.））的长度-重量关系的变异性

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摘要

Following extensive review, a model of the Atlantic bluefin tuna (ABFT), Thunnus thynnus (L.), length-weight relationship for the eastern Atlantic and Mediterranean (RW = 0.0000188 SFL3.01247; Ec 1) is presented on the basis of samples of ABFT spawners, with an average value of index K = 2.03 +/- 0.15SD, collected by the Atlantic traps of Portugal and Spain in the Strait of Gibraltar (1963; 1996-1998; 2000-2012), and a set of samples of juvenile fishes from ICCAT-GBYP (n = 707). The resulting model (Ec 1), together with the model used for the eastern stock assessment (RW = 0.000019607 SFL3.0092; Ec 2) and a recently adopted by ICCAT Standing Committee on Research and Statistics (SCRS) (RW = 0.0000315551 SFL2.898454; EAST) are analyzed in using a bi-variant sample [SFL (cm), RW (kg)] of 474 pairs of data with the aim of validating them and establishing which model(s) best fit the reality represented by the sample and, therefore, will have the greatest descriptive and predictive power. The result of the analysis indicates that the model EAST clearly underestimates the weight of spawning ABFT and that model Ec 2 overestimates it slightly, being model Ec 1 that best explains the data of the sample. The result of the classical statistical analysis is confirmed by means of the quantile regression technique, selecting the quantiles 5, 25, 50, 75, and 95%. Other fisheries and biological indicators also conclude that the model EAST gradually underestimates the weight of ABFT spawners (of 2-3 m) by 9-12.5 %, and does not meet the criterion that for RW = 725 kg (W-max), SFL = 319.93 +/- 11.3 cm (L-max).
机译：经过广泛审查，在样本的基础上，提出了大西洋蓝鳍金枪鱼（ABFT），金枪鱼（L.）的模型，以及东大西洋和地中海的长度-重量关系（RW = 0.0000188 SFL3.01247; Ec 1）由直布罗陀海峡的葡萄牙和西班牙的大西洋陷阱（1963年; 1996-1998年; 2000-2012年）收集的ABFT产卵器的平均值为K = 2.03 +/- 0.15SD ICCAT-GBYP中的幼鱼数量（n = 707）。结果模型（Ec 1），连同用于东部库存评估的模型（RW = 0.000019607 SFL3.0092; Ec 2），以及ICCAT研究和统计常设委员会（SCRS）最近采用的模型（RW = 0.0000315551 SFL2）。使用474对数据的双变量样本[SFL（cm），RW（kg）]进行分析，以验证数据并确定哪种模型最适合样本所代表的现实。因此具有最大的描述性和预测性。分析结果表明，模型EAST明显低估了产卵ABFT的权重，而模型Ec 2则稍微高估了它，这是模型Ec 1最能说明样本数据。经典统计分析的结果通过分位数回归技术进行了确认，选择了5、25、50、75和95％的分位数。其他渔业和生物学指标也得出结论，模型EAST逐渐低估了2-3 m ABFT产卵器的重量9-12.5％，并且不满足RW = 725 kg（W-max），SFL的标准= 319.93 +/- 11.3厘米（L-最大）。

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