New study finds overfishing has halved shark and ray populations since 1970. The analysis published in @ScienceMagazine reveals that overfishing has caused populations of sharks, rays, and chimaeras to decline by more than 50%. Learn more https://t.co/U3h5shHLbb via @IUCNShark https://t.co/LuZ6nyREek UN Biodiversity Climate Change Science on Telegram by @ClimateChangeScience A @grttme project - Other backups: @Hallotme