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Freshwater Fish

All articles tagged with #freshwater fish

Transmissible Melanoma Found in Memphremagog's Freshwater Fish
science1 day ago

Transmissible Melanoma Found in Memphremagog's Freshwater Fish

UVM researchers report that brown bullhead catfish in Lake Memphremagog carry a transmissible melanoma, with cancer cells moving between fish like parasites. DNA from cancers is more similar across individuals than to the fish, marking the first documented case of a transmissible cancer in freshwater fish. The disease is widespread in the lake, shows no proven link to local pollution, and poses no known risk to humans; the study, published in Nature, could illuminate how cancers evolve and spread.

via Seven Days Vermont|
#cancer-evolution#freshwater-fish#lake-memphremagog
Many U.S. Freshwater Fish Harbor Parasites That Can Infect Humans
health1 year ago

Many U.S. Freshwater Fish Harbor Parasites That Can Infect Humans

A study finds that over 90% of popular freshwater game fish in Southern California carry invasive trematode parasites capable of infecting humans, posing a potential health risk. Proper cooking or freezing can mitigate this risk, but many people may be unaware of the danger, highlighting the need for increased public education and reporting of fishborne parasitic infections.

via Phys.org|
#california#freshwater-fish#health
Rapidly Rising Extinction Threat for Freshwater Fish Species Due to Climate Change
environment2 years ago

Rapidly Rising Extinction Threat for Freshwater Fish Species Due to Climate Change

A report released by the International Union for Conservation of Nature (IUCN) warns that 25% of the world's freshwater fish species, amounting to thousands of species, are at risk of extinction. Climate change, pollution, overfishing, invasive species, disease, dams, and water extraction are all contributing factors. The IUCN emphasizes the importance of well-managed freshwater ecosystems to maintain food security, livelihoods, and economies. Around 200 million people rely on freshwater fish as their primary source of protein. The IUCN's Red List of Threatened Species now includes 157,190 species, with 44,016 facing extinction.

via CBS News|
#climate-change#environment#extinction-risk
Global Assessment Reveals Alarming Extinction Risk for Freshwater Fish
environment2 years ago

Global Assessment Reveals Alarming Extinction Risk for Freshwater Fish

A new assessment by the International Union for Conservation of Nature (IUCN) reveals that nearly a quarter of the world's freshwater fish species are at risk of extinction due to global heating, overfishing, and pollution. Climate change is impacting nearly a fifth of all threatened freshwater species, causing falling water levels, shifting seasons, and seawater intrusion. Out of the assessed species, 3,086 out of 14,898 are at risk of disappearing. The assessment also highlights the increasing threats to mahogany, Atlantic salmon, and green turtles, but there is good news about the saiga antelope population in Kazakhstan, which has increased by 1,100% in just seven years. The reintroduction of the scimitar-horned oryx in Chad is another success story, while the Atlantic salmon and green turtles are also at risk of vanishing due to habitat loss and climate change.

via The Guardian|
#climate-change#environment#extinction-risk
Toxic "Forever Chemicals" Found in Freshwater Fish Across US
health3 years ago

Toxic "Forever Chemicals" Found in Freshwater Fish Across US

Freshwater fish in almost every state in the US have been found to be contaminated with PFAS, toxic "forever chemicals" that have been linked to cancer and other illnesses. PFAS have been widely used for decades to make nonstick cookware, waterproof fabrics, firefighting foam, and even cosmetics. The federal government is proposing strict regulations limiting PFAS in drinking water, but for the time being, states essentially make their own rules. Many companies are phasing out certain kinds of PFAS, but many more remain in use.

via CBS News|
#contamination#environmental-pollution#freshwater-fish