2021 State of the Environment Report Marine Chapter – Expert Assessment – State and Trend – Demersal and benthopelagic fish species, slope (>200 m)

《2021年环境状况报告》的海洋章节包含了从海洋数据流中开发的多个专家模板。这一元数据记录描述了专家评估“底栖和深海鱼类物种的状况和趋势，坡度（200米）"。<br /> * 专家评估报告全文的PDF格式，包括图表（如有提供），可在本记录的“在线资源”部分下载，名称为“2021年专家评估-底层和底层鱼类物种，坡度（&gt;200米）"*<br /> <br /> ----------------------------------------<br /> <br /> 供专家评估的物种/群落描述<br /> 这一评估将特别侧重于主要在澳大利亚东南地区2亿米处发现的商业种群，这些种群受捕捞影响最大，并对主要商业种群的种群状况进行最全面的研究。相比之下，西澳大利亚州西部深水拖网渔业的渔获量较小，自2003年以来每年约为100吨或更少。已尝试在范围上与2016年环境状况报告保持一致。关于底层鱼类和深海鱼类种群状况和趋势的现有资料大多来自对种群状况进行的具体鱼种评估，评估使用的资料包括渔业调查、渔获量、渔获量率以及年龄和长度等相关生物数据（注意，鲨鱼也包括在单独的评估中）。 <br /> <br /> 用于专家评估的数据流<br /> 用于本次评估的数据主要来自AFMA物种特定种群评估报告和最新的渔业状况报告（Patterson等人，2020年）。<br /> <br /> ----------------------------------------<br /> <br /> 2021年国有企业评估摘要[详细信息请参见随附的专家评估]<br /> <br /> · 2021 ·<br /> 评价等级：良好<br /> 评估趋势：稳定<br /> 置信度：充分<br /> 信心趋势：充足<br /> 可比性：与2016年评估结果可比<br /> · 2016 ·<br /> 评价等级：良好<br /> 评估趋势：改进<br /> 置信度：充分的高质量证据或高度共识<br /> 可信度趋势：充足的高质量证据或高度共识<br /> 可比性：等级和趋势与2011年评估有一定可比性<br /> · 2011 ·<br /> 评价等级：差<br /> 评估趋势：改进<br /> 置信度：证据有限或共识有限<br /> 可信度趋势：充足的高质量证据或高度共识<br /> <br /> ----------------------------------------<br /> <br /> 2016年以来的变化<br /> 2015年至2019年期间，SER的底栖海洋区域中过度捕捞的种群数量保持不变（Patterson等人，2020年），导致趋势分类为“稳定”（而不是2011年至2016年的“改善”）。在2011年至2016年期间，一些种群从不确定状态转变为未过度捕捞状态（粉红灵，ribaldo，海洋鲈鱼），导致状态改善（图8.3，Patterson等人，2020年）。虽然目前的状况稳定，但到2020年仍有一些种群的状况不确定或被过度捕捞（大致是刺鲨、深水鲨鱼、奥列奥、东部宝石鱼、西部和南部橙子）。管理层正积极与利益攸关方接触，以改善这些种群的状况。

The Marine chapter of the 2021 State of the Environment (SoE) report incorporates multiple expert templates developed from streams of marine data. This metadata record describes the Expert Assessment "State and Trend of demersal and benthopelagic fish species, slope (&gt;200 m)". <br /> ***A PDF of the full Expert Assessment, including figures and tables (where provided) is downloadable in the "On-line Resources" section of this record as "EXPERT ASSESSMENT 2021 - Demersal and benthopelagic fish species, slope (&gt;200 m)"***<br /> <br /> ----------------------------------------<br /> <br /> DESCRIPTION OF SPECIES/COMMUNITY FOR EXPERT ASSESSMENT<br /> This assessment will focus particularly on commercial stocks predominantly found &gt;200m in the South East Region (SER) of Australia that are the most impacted by fishing and with the most comprehensive studies of stock status of key commercial populations. For western Australia, the catch in the Western Deepwater Trawl Fishery is small in comparison, with approximately 100t or less taken annually since 2003. Attempts have been made to be consistent in scope with the 2016 State of the Environment report. Most information available on the state and trends of demersal and benthopelagic fish species is derived from species-specific assessments of stock status that use information such as fishery surveys, catches, catch rates and associated biological data such as ages and lengths (note that sharks are also included in a separate assessment). <br /> <br /> DATA STREAM(S) USED IN EXPERT ASSESSMENT<br /> The data used for this assessment were largely derived from AFMA species specific stock assessment reports and the latest Fishery Status Report (Patterson et al., 2020). <br /> <br /> ----------------------------------------<br /> <br /> 2021 SOE ASSESSMENT SUMMARY [see attached Expert Assessment for full details]<br /> <br /> • 2021 •<br /> Assessment grade: Good<br /> Assessment trend: Stable<br /> Confidence grade: Adequate<br /> Confidence trend: Adequate<br /> Comparability: Comparable to the 2016 assessment<br /> • 2016 •<br /> Assessment grade: Good<br /> Assessment trend: Improving<br /> Confidence grade: Adequate high-quality evidence or high level of consensus<br /> Confidence trend: Adequate high-quality evidence or high level of consensus<br /> Comparability: Grade and trend are somewhat comparable to the 2011 assessment<br /> • 2011 •<br /> Assessment grade: Poor<br /> Assessment trend: Improving<br /> Confidence grade: Limited evidence or limited consensus<br /> Confidence trend: Adequate high-quality evidence or high level of consensus<br /> <br /> ----------------------------------------<br /> <br /> CHANGES SINCE 2016 SOE ASSESSMENT<br /> The number of stocks in the benthopelagic region of the SER with over-fished status has remained the same between 2015 and 2019 (Patterson et al., 2020), leading to the ‘stable’ categorisation of trend (as opposed to ‘improving’ between 2011 and 2016). Between 2011 and 2016 some stocks moved from uncertain to not over-fished status (pink ling, ribaldo, ocean perch), leading to an improving status (Figure 8.3, Patterson et al., 2020). While the current status is stable, there remain a number of stocks with uncertain or over-fished stock-status in 2020 (gulper sharks, deepwater sharks, oreos, eastern gemfish, western and southern orange roughly). Management is actively engaging with stakeholders to improve the status of these stocks.