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The global assessment of freshwater animals on the International Union for Conservation of Nature’s (IUCN) Red List of Threatened Species evaluated the extinction risk of 23,496 freshwater ...
Researchers assessed the status of 23,496 species of freshwater animals in groups including fishes, crustaceans such as crabs, crayfish and shrimp and insects such as dragonflies and damselflies ...
“Most species don’t have just one threat putting them at risk of extinction, but many threats acting together,” said Sayer, a study-co-author. The tally, published in the journal Nature, is the first that time researchers have analyzed the global risk to freshwater species. Previous studies have focused on land animals including including ...
Of North American freshwater species, an estimated 48.5% of mussels, 22.8% of gastropods, 32.7% of crayfishes, 25.9% of amphibians, and 21.2% of fish are either endangered or threatened. [24] Extinction rates of many species may increase severely into the next century because of invasive species, loss of keystone species, and species which are ...
Freshwater species are beginning to decline at twice the rate of species that live on land or in the ocean. This rapid loss has already placed 27% of 29,500 species dependent on fresh water on the IUCN Red List. [100] Global populations of freshwater fish are collapsing due to water pollution and overfishing. Migratory fish populations have ...
Those species that are extant, yet are threatened with extinction, are referred to as threatened or endangered species. The dodo of Mauritius, shown here in a 1626 illustration by Roelant Savery, is an often-cited example of modern extinction. [25] Currently, an important aspect of extinction is human attempts to preserve critically endangered ...
A threatened species is any species (including animals, plants and fungi) which is vulnerable to extinction in the near future. Species that are threatened are sometimes characterised by the population dynamics measure of critical depensation , a mathematical measure of biomass related to population growth rate .
California's Fish and Game Commission voted to consider listing white sturgeon, the largest freshwater fish in North America, as a threatened species.