Invasive salmon, clams and seaweed are next threats to biodiversity in Britain
Reports and Proceedings
Updates every hour. Last Updated: 12-Sep-2025 21:11 ET (13-Sep-2025 01:11 GMT/UTC)
Pink salmon, Purple Asian clams, marine invertebrates that form spaghetti-like colonies and a nematode worm that causes extensive deaths of trees are among the new entries in experts’ watchlist of invasive non-native species that could threaten Great Britain in the next 10 years.
The latest version of the watchlist, which again includes known problem species such as the yellow-legged (Asian) hornet, raccoon and twoleaf watermilfoil, has been produced by experts led by the UK Centre for Ecology & Hydrology (UKCEH) and commissioned by Defra.
Boys born to mothers who have polycystic ovary syndrome (PCOS) or who have higher levels of testosterone during the third trimester are more likely to be less physically active at age 7, according to research presented at the first Joint Congress between the European Society of Paediatric Endocrinology (ESPE) and the European Society of Endocrinology (ESE). Testosterone levels or PCOS in the mothers were not associated with physical activity in girls, but 7-year-old girls whose mothers had higher testosterone levels during pregnancy had lower muscle strength. The findings highlight the important role that maternal testosterone and PCOS may play in future development in boys and girls independently.