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Researchers Discover Contagious Cancer in North American Catfish, Raising Environmental Concerns

Researchers Discover Contagious Cancer in North American Catfish, Raising Environmental Concerns

An international team of researchers has identified a transmissible melanoma in the brown catfish (Ameiurus nebulosus), marking the first documented case of such a cancer in fish and in a freshwater ecosystem. This discovery was made after an unusually high number of catfish with black lesions were found in Lake Memphremagog, a body of water straddling Vermont and Quebec. Initial suspicions pointed to environmental pollutants as the cause, possibly linked to flooding from Tropical Storm Irene in 2011. However, genetic analyses revealed that the tumors were more closely related to each other than to the host fish, suggesting a single original cancer that spread among the fish. This finding was published in the journal Nature.

Researchers Discover Contagious Cancer in North American Catfish, Raising New Research Opportunities

Researchers Discover Contagious Cancer in North American Catfish, Raising New Research Opportunities

An international team of researchers has identified a transmissible melanoma in the brown catfish (Ameiurus nebulosus), marking the first documented case of such a cancer in fish and in a freshwater ecosystem. The discovery was made after an unusually high number of catfish with black lesions were found in Lake Memphremagog, a body of water between Vermont and Quebec. Initial suspicions pointed to environmental factors like pollution, but genetic analyses revealed that the tumors shared a genetic identity distinct from their hosts, indicating a transmissible clonal cancer. This finding suggests that the tumors may have originated from a single cancer that learned to spread among individual fish.

Scientists Identify First Transmissible Cancer in Wild Catfish, Raising New Questions

Scientists Identify First Transmissible Cancer in Wild Catfish, Raising New Questions

Researchers have discovered the first known transmissible cancer in wild catfish, specifically in the brown bullhead catfish population of Lake Memphremagog, which spans Vermont and Quebec. This finding was published in a study in Nature, revealing that 23% to 37% of sampled catfish had melanoma lesions. Initially, environmental factors were suspected due to regional flooding from Tropical Storm Irene in 2011, which could have introduced cancer-causing pollutants. However, further investigation using whole-genome sequencing showed that the tumors were genetically similar across different fish, suggesting a single line of cancer cells spreading among the fish. This marks the first instance of a transmissible cancer identified in a freshwater fish species.

Transmissible Cancer Detected in Catfish at Lake Memphremagog Raises Concerns

Transmissible Cancer Detected in Catfish at Lake Memphremagog Raises Concerns

Researchers have identified a transmissible cancer affecting brown bullhead catfish in Lake Memphremagog, which spans northern Vermont and Quebec. The discovery was made by the Vermont Fish & Wildlife Department during their annual fish census. The cancer manifests as dark streaks on the fish, resembling black tar, and is believed to spread from fish to fish. This type of cancer is rare, previously identified in only a few animal species. The study, published in Nature, suggests that the cancer cells can survive outside the host and infect new fish, potentially during spawning when fish are in close contact. The tumors' genetics are similar across affected fish, indicating a clonal origin. Researchers are investigating the transmission mechanisms and potential environmental or viral factors that may be affecting the fish's immune systems.

Quebec and U.S. Lakes See Rare Contagious Cancer in Catfish, Raising Environmental Concerns

Quebec and U.S. Lakes See Rare Contagious Cancer in Catfish, Raising Environmental Concerns

A genetic study has identified a rare transmissible cancer among catfish in Quebec and the northeastern U.S., marking the first known instance of such cancer in fish. The study, published in Nature, reveals that melanoma tumors are spreading among brown bullhead catfish in Lake Memphremagog, which spans the border between Quebec and Vermont. The tumors, first reported in 2012, have been linked to higher concentrations of metals like arsenic in the fish's skin. Researchers are investigating whether the disease is transmitted during spawning, as the tumors seem to shed cells easily. Despite the findings, some experts remain skeptical about labeling it a transmissible cancer without further evidence.

Vermont Lake Catfish Affected by First-Known Freshwater Contagious Cancer

Vermont Lake Catfish Affected by First-Known Freshwater Contagious Cancer

A transmissible cancer has been discovered among brown bullhead catfish in Lake Memphremagog, a glacial lake located in Vermont and Quebec, Canada. This marks the first instance of such a cancer spreading among fish in a freshwater environment. The discovery was made after researchers observed high rates of raised black lesions on the catfish, which were identified as malignant melanomas. These lesions were found in 23 to 37% of the sampled fish between 2014 and 2017. The lake serves as a drinking water source for 175,000 people, raising concerns about potential contamination. Researchers are investigating the cause, with one hypothesis linking it to pollution from Tropical Storm Irene in 2011.

Vermont Scientists Discover Transmissible Cancer in Catfish

Vermont Scientists Discover Transmissible Cancer in Catfish

Researchers from the University of Vermont have identified a transmissible cancer in brown bullhead catfish in Lake Memphremagog. The cancer, which behaves like a parasite, is the first of its kind found in a freshwater fish species. The discovery raises questions about the role of pollution, habitat stress, and climate change in disease evolution. The cancer cells spread between fish, particularly those of spawning age, and are not a threat to humans. The study highlights the need for further research into the environmental factors contributing to the spread of such diseases.

Transmissible Cancer Discovered in Freshwater Fish Raises New Questions

Transmissible Cancer Discovered in Freshwater Fish Raises New Questions

Researchers at the University of Vermont have identified a transmissible form of cancer in brown bullhead catfish in Lake Memphremagog, marking the first such discovery in a freshwater fish species. The cancer cells, which behave like parasites, can move from fish to fish, a phenomenon previously observed only in a few other animal species. The study, published in Nature, found that the cancer cells are more closely related to each other than to their host fish, indicating a clonally transmissible cancer. The disease poses no known risk to humans, as the cancer cells cannot infect or survive in other species.

Democratic Candidates for Vermont Governor Seek to Energize Voters Ahead of Primary

Democratic Candidates for Vermont Governor Seek to Energize Voters Ahead of Primary

In Vermont, Democratic candidates Aly Richards and Amanda Janoo are campaigning to unseat Republican Governor Phil Scott in the upcoming election. Richards, known for her work in childcare funding, emphasizes her experience and pragmatic approach. Janoo, an economist, advocates for structural change and universal healthcare. Both candidates face the challenge of low voter recognition, with a recent poll indicating that many voters are unfamiliar with them. The primary election will test their ability to connect with voters and present viable alternatives to the popular incumbent governor.

American Heart Association Honors Vermont Volunteer for Heart Health Advocacy

American Heart Association Honors Vermont Volunteer for Heart Health Advocacy

Jenny Boquet, a Vermont volunteer, has been awarded the American Heart Association's Heart of Gold Award. This recognition comes after more than two decades of her dedicated service and advocacy for heart health, inspired by the sudden cardiac arrest death of her younger brother, Jeremy, in 2015. Boquet's efforts include volunteer work, public advocacy, and fundraising aimed at improving heart health and emergency preparedness. Her personal connection to the cause was solidified when she performed CPR on her brother until emergency responders arrived. Boquet's work is also influenced by Jeremy's own volunteer efforts with the Heart Association. Annually, Boquet and her family participate in the Vermont Heart Walk in his memory, engaging in fundraising and community outreach. She also volunteers at the Go Red for Women Dinner, which raises awareness about heart disease and stroke.

Vermont Estate with Underground Tunnel and Secret Rooms Goes Up for Auction

Vermont Estate with Underground Tunnel and Secret Rooms Goes Up for Auction

Vermont Estate with Underground Tunnel and Secret Rooms Goes Up for Auction

Ordovician Seashells Became New Ecosystems 470 Million Years Ago

Ordovician Seashells Became New Ecosystems 470 Million Years Ago

A study led by scientists at the University of Tartu reveals that approximately 470 million years ago, empty mollusc shells began serving as habitats for small sea creatures, marking a significant ecological shift in ocean ecosystems. During the Middle Ordovician, animals started inhabiting the spacious shells of dead nautiloids, ancient cephalopods, and later spread to smaller shells of snails and clams. This development led to densely packed communities within shells, consisting of filter-feeders like bryozoans and sponges. The study highlights how shell shape influenced the size and diversity of resident communities, with nautiloid shells offering better living conditions due to their open chambers.