Southern Bluefin Tuna (SBT) Thunnus maccoyii (Castelnau) comprises a single, highly migratory stock that is managed internationally by the Commission for the Conservation of Southern Bluefin Tuna (CCSBT). CCSBT members are expected to provide estimates of all sources of fishing mortality within their allocation, including commercial and recreational catch and any additional mortality associated with discarded or released catch. In the absence of a national registration system for the SBT recreational fishery, which would provide a comprehensive sampling frame, an ensemble of off-site and on-site survey methods was used across five state jurisdictions to provide the first species-specific national assessment of a recreational fishery in Australia. The national harvest of SBT for the 12 months from December 2018 to November 2019 by the recreational sector was 270 t (239–301 t: 95% CL). This survey has resulted in the first official recognition of a catch set aside to the recreational sector for an Australian Commonwealth managed fishery with 5% per cent of the CCSBT allocation to Australia now set aside for the sector.

中文翻译：

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估计澳大利亚休闲渔业部门的南方蓝鳍金枪鱼金枪鱼的全国捕捞死亡率

南方蓝鳍金枪鱼 (SBT) Thunnus maccoyii（Castelnau）由南蓝鳍金枪鱼保护委员会（CCSBT）在国际上管理的单一高度洄游种群。CCSBT 成员应提供其分配范围内所有捕捞死亡率来源的估计值，包括商业和休闲渔获物以及与丢弃或释放渔获物相关的任何额外死亡率。在没有提供全面抽样框架的 SBT 休闲渔业国家注册系统的情况下，在五个州管辖范围内使用了一套场外和现场调查方法，以提供第一个针对特定物种的国家评估澳大利亚的休闲渔业。2018 年 12 月至 2019 年 11 月的 12 个月，全国娱乐业的 SBT 产量为 270吨（239–301吨：95% CL）。这项调查首次正式承认为澳大利亚联邦管理的渔业留给娱乐部门的渔获量，现在拨给澳大利亚的 CCSBT 拨款的 5% 用于该部门。