MIGRATORY FRESHWATER FISHES

It tracks the average rate of change in abundance amongst monitored populations 6 of vertebrate species in much the same way that a stock market index tracks the value of a set of shares or a retail price index tracks the cost of a basket of consumer goods. [...] Number of populations and species of migratory freshwater fishes in the LPD, the number of currently known species (based on IUCN Red List and experts), and the percentage representation for each subset for which an index was calculated. [...] The temperate zone includes the Nearctic and Palearctic (this roughly equates to North America, Eurasia north of the Himalayas, and North Africa), and the tropical zone (the remaining areas of the world). [...] The recent European Parliament approval of the Nature Restoration Law (European Parliament 2024) – the key element of the Strategy – and its planned adoption by the Council represents a major step in addressing one of the main threats to migratory freshwater fishes in Europe. [...] For example, in the 2022 update of the global LPI, searches in Portuguese have rapidly expanded the data set for Brazil, trebling the number of species represented to over 1,000 in a few months (WWF 2022).