Lutjanid snappers belonging to the subfamilies Apsilinae and Etelinae are commercially valuable components of tropical deepwater fisheries throughout much of the Indo-Pacific region. Based on age assessment using sagittal otoliths, the age-specific demographic characteristics of four deepwater snappers, Eteis coruscans, Paracaesio caerulea, Pristipomoides filamentosus, and Pristipomoides sieboldii, in the Okinawa Islands, southwestern Japan, were examined, and the results were discussed for fishery management. Age validation using edge-type analysis demonstrated that opaque zones in all species were formed once per year and were considered valid annual growth increments. The von Bertalanffy growth equations were also determined for each species. These snappers are long-lived (>50 years for E. coruscans and P. caerulea and > 30 years for the two species of Pristipomoides) and relatively slow-growing. The age of acquiring sexual maturity in females was relatively later in E. coruscans, P. caerulea, and P. filamentosus than in P. sieboldii. The results revealed differences in the biological traits among these four species; E. coruscans and P. caerulea with long lifespans and late maturation are particularly more vulnerable to fishing impact than the two Pristipomoides species. We therefore recommend that further approaches to decrease and control fishing intensity, such as networking of marine protected areas and regulation to control the numbers of boats and/or the total allowable catch, are necessary for management of the stock of these species, especially for E. coruscans and P. caerulea. This article is protected by copyright. All rights reserved.

中文翻译：

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四种具有重要商业价值的深水鲷鱼的特定年龄人口比较：对长寿 lutjanid 渔业管理的影响

属于亚科 Apsilinae 和 Etelinae 的 Lutjanid 鲷鱼是整个印度太平洋地区大部分热带深水渔业的商业价值组成部分。基于使用矢状耳石的年龄评估，研究了日本西南部冲绳群岛的四种深水鲷鱼（Eteis coruscans、Paracaesio caerulea、Pristipomoides filamentosus 和 Pristipomoides sieboldii）的特定年龄人口特征，并对结果进行了渔业讨论管理。使用边缘类型分析的年龄验证表明，所有物种的不透明区域每年形成一次，被认为是有效的年度增长增量。还确定了每个物种的 von Bertalanffy 生长方程。这些鲷鱼寿命很长（E. coruscans 和 P. caerulea > 50 年，> 30 年的 Pristipomoides）和相对缓慢的生长。E. coruscans、P. caerulea 和 P. filamentosus 的雌性获得性成熟年龄相对晚于 P. sieboldii。结果揭示了这四个物种之间的生物学特性的差异；E. coruscans 和 P. caerulea 寿命长、成熟晚，比这两种 Pristipomoides 物种更容易受到捕捞影响。因此，我们建议进一步降低和控制捕捞强度的方法，例如海洋保护区的联网和控制船只数量和/或总允许捕获量的法规，对于管理这些物种的种群是必要的，尤其是对于 E . coruscans 和 P. caerulea。本文受版权保护。版权所有。