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23 lut 2021 · 51% of all fish species are found in fresh water—that’s more than 18,000 different species. And they make up ¼ of all the world’s vertebrate species. Of course, those are just the ones we know of – More than 100 new species were discovered in South America alone every year during the last decade.
26 lut 2021 · This week, 16 conservation organizations released a global assessment of the world’s freshwater fish species, finding nearly a third are at risk of extinction.
4 mar 2021 · The IUCN Red List of Threatened Species has declared 80 to be extinct, 16 of those in 2020 alone. The numbers of migratory freshwater fish such as salmon have declined 76 percent since 1970, while mega-fish such as beluga sturgeon have fallen by 94 percent in the same time period.
23 lut 2021 · Indeed, 80 species of freshwater fish have already been declared ‘Extinct’ by the IUCN Red List of Threatened Species, including 16 in 2020 alone. Meanwhile, populations of migratory freshwater fish have fallen by 76 per cent since 1970 and mega-fish by a catastrophic 94 per cent.
larger species – the so-called ‘megafish’ – have crashed by a staggering 94 per cent. Nearly a third of all freshwater fish species are threatened by extinction – and for 80 extinct species it’s already too late. There’s no mystery about why freshwater fish numbers are falling so precipitously: habitat degradation, poorly planned
15 mar 2021 · Water temperature is considered the most important physiological threshold for fish species, as mortality of ectothermic species occurs above and below lethal thresholds 8,46.
It’s an extraordinary fact: 51% of all known species of fish live in freshwater - 18,075 species. And more are being discovered all the time.
