International (ICES) and national (UK) fish stock and shellfish stock data from 2020 assessment year

The dataset collected includes assessment output relating to the years from
1905 to 2020 inclusive for the following variables for each stock: the annual
recruitment estimate, the stock size (spawning stock biomass), landings
(tonnes of fish brought to shore), catches (tonnes of fish caught at sea),
fishing pressure (a fishing mortality rate), Fmsy (the target fishing
mortality that will achieve maximum sustainable yield in the long term), Upper
and lower range estimates for Fmsy consistent with multi-annual plans and
ICES advice, MSYB trigger (a threshold for spawning stock biomass, below which
fishing mortality should be reduced below Fmsy, following the ICES advice
rule, to avoid reduced reproductive capacity, Blim (a lower limit threshold
for spawning stock biomass below which there is a high risk of reduced
reproductive capacity). The stock assessment data for fish and shellfish
stocks of UK interest is used to assess indicators of reproductive capacity
(based on spawning stock biomass) and fishing pressure (based on fishing
mortality).

所收集的数据集包括1905年至2020年期间（含）针对以下变量的评估输出，针对每只股票：年度招募估计值、种群规模（产卵种群生物量）、捕捞量（上岸的鱼吨数）、捕获量（海上捕获的鱼吨数）、捕捞压力（捕捞死亡率）、Fmsy（长期实现最大可持续产量的目标捕捞死亡率）、与多年度计划和ICES建议一致的Fmsy上下限估计值、MSYB触发器（产卵种群生物量的一个阈值，低于该阈值时，应遵循ICES建议规则将捕捞死亡率降低至Fmsy以下，以避免繁殖能力下降）、Blim（产卵种群生物量下方的一个下限阈值，低于该阈值存在繁殖能力下降的高风险）。针对英国感兴趣的鱼类和贝类种群评估数据，用于评估繁殖能力指标（基于产卵种群生物量）和捕捞压力指标（基于捕捞死亡率）。