Assessment of the South African anchovy resource using data up to 2024

The baseline assessment of the South African anchovy resource has been updated to include data from 2024. This model, which assumes time-invariant natural mortality, is compared with time-varying and density dependant natural mortality alternatives. Given the recent consecutive years of poor recruitment, one alternative to a time-invariant Beverton Holt stock recruitment relationship is also re-considered.南非鳀鱼资源的基线评估已完成更新，纳入了2024年的相关数据。本模型假设自然死亡率为时间不变常数，将其与自然死亡率随时间变化以及自然死亡率受密度依赖调控的两类备选模型进行了对比分析。鉴于近年连续出现种群补充量不足的状况，针对时间不变型贝弗顿-霍尔特（Beverton-Holt）种群补充量关系的一类备选方案也得到了重新考量。