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首页> 外文期刊>ICES Journal of Marine Science >Age and growth of longtail tuna (Thunnus tonggol) in tropical and temperate waters of the central Indo-Pacific
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Age and growth of longtail tuna (Thunnus tonggol) in tropical and temperate waters of the central Indo-Pacific

机译：印度洋-太平洋中部热带和温带水域长尾金枪鱼（Thunnus tonggol）的年龄和生长

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摘要

Age and growth of longtail tuna (Thunnus tonggol) were assessed by examination of annual growth increments in sectioned sagittal otoliths from 461 fish (238-1250 mm fork length, L_F) sampled from tropical and temperate waters in the central Indo-Pacific between February 2003 and April 2005. Edge and microincrement analyses (presumed daily increments) suggest that longtail tuna deposit a single annual growth increment mainly between August and October. Age was, therefore, estimated for all fish by counting assumed annual growth increments. Ages ranged from 154 d to 18.7 years, with most fish being 3-9 years. Five growth models were fitted to length-at-age data, all of which indicated that the species is relatively slow-growing and long-lived. Recaptures of two tagged fish at liberty for 6.2 and 10.5 years support this notion. A bias-corrected form of Akaike's Information Criterion determined that the Schnute-Richards model provided the best fit to length-at-age data, with model parameter estimates (sexes combined) of L_∞ = 135.4 cm L_F, K = 22.3 year~(-1), t_o = 0.120 years, δ= 150.0, v = 0.019, and γ=2.7 × 10~(-8). There was no significant difference in growth between sexes. The results suggest that longtail tuna grow more slowly and live longer than other tuna species of similar size. Coupled with their restricted neritic distribution, longtail tuna may be vulnerable to overexploitation by fisheries, and caution needs to be exercised in managing the species until more reliable biological and catch data are collected to assess the status of the population.
机译：长尾金枪鱼（Thunnus tonggol）的年龄和生长情况通过检查2003年2月在印度洋-太平洋中部热带和温带水域采样的461条鱼（238-1250 mm叉子长，L_F）的分段矢状耳石的年生长增量来评估和2005年4月。边缘和微增量分析（假定每日增量）表明，长尾金枪鱼主要在8月至10月之间沉积一个单一的年度增长增量。因此，通过计算假定的年增长量来估算所有鱼类的年龄。年龄从154 d到18.7岁不等，大多数鱼类为3-9岁。根据年龄长度数据拟合了五个生长模型，所有这些模型都表明该物种生长相对缓慢且寿命长。重新捕获两条带标签的鱼长达6.2年和10.5年，支持了这一观点。通过Akaike信息准则的偏差校正形式，可以确定Schnute-Richards模型最适合年龄长度数据，模型参数估计值（合并的性别）为L_∞= 135.4 cm L_F，K = 22.3 year〜（ -1），t_o = 0.120年，δ= 150.0，v = 0.019，并且γ= 2.7×10〜（-8）。男女之间的生长没有显着差异。结果表明，长尾金枪鱼比其他类似大小的金枪鱼物种生长更慢，寿命更长。长尾金枪鱼由于其限制性鱼类分布有限，可能容易受到渔业过度开发的影响，因此在管理该物种时应谨慎行事，直到收集到更可靠的生物学和捕捞数据以评估种群状况为止。

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