UK Biodiversity Indicator B2, Sustainable fisheries

This spreadsheet is the underlying data for the biodiversity indicator B2, Sustainable fisheries.

Fish are an integral component of marine biodiversity. They are an important element of the food chain for seabirds, seals and cetaceans and are a source of food and employment for people. Sustainable fisheries will help to ensure marine ecosystems remain diverse and resilient and provide a long-term and viable fishing industry.

The indicator shows the percentage of fish stocks in seas around the UK that are both harvested sustainably and are at full reproductive capacity. It is based on a group of seven species in 13 stocks for which there are reliable estimates of fishing mortality and spawning biomass, together with precautionary reference points for fishing mortality and biomass that allow the sustainability of the stocks to be evaluated. The indicator stocks include a range of local and widely distributed finfish species of major importance to the UK fishing industry.

This is one of a suite of 24 UK biodiversity indicators published by JNCC on behalf of Defra; the latest publication date was 19 January 2016 - for indicator B2 the latest data are for 2013. The supporting technical spread sheet lists the stocks used to create the indicator.

本电子表格是生物多样性指标B2，即可持续渔业的基础数据。
鱼类是海洋生物多样性的一个不可或缺的组成部分。它们是海鸟、海豹和鲸类食物链中的重要元素，同时也是人类食物和就业的来源。可持续渔业有助于确保海洋生态系统保持多样性和韧性，并为长期且可行的渔业产业提供保障。
该指标展示了英国周边海域中，鱼类种群既得到可持续收获又处于完全繁殖能力的百分比。该指标基于13个种群中的7种鱼类，对于这些鱼类，我们有可靠的捕捞死亡率和产卵生物量估计，以及捕捞死亡率和生物量的预防性参考点，这些参考点允许评估鱼群的可持续性。指标中所包含的鱼群包括对英国渔业产业具有重要意义的多种地方性和广泛分布的经济鱼类。
这是由JNCC代表英国环境、食品和乡村事务部（Defra）发布的24个英国生物多样性指标之一；最新的发布日期为2016年1月19日——对于指标B2，最新的数据是2013年的数据。支持性技术电子表格列出了创建指标所使用的种群。