The Medieval Practices That Reshaped Europe’s Fish

The Atlantic – In the year 1289, King Philip IV of France was worried about fish. “Each and every watershed of our realm,” he proclaimed, “large and small, yields nothing due to the evil of fishers.” Environmental change, expanding cities, and overfishing had sent aquatic populations into a tailspin. Because they were scarce, the fish, King Philip noted, “are much more costly than Read More…

Lampreys: How This Fish Can Help Fight Brain Cancer And Stroke

Medical Daily – Coming from an ancient lineage of jawless fish, lampreys are one of the oldest surviving fish species that are usually known for their funnel-like sucking mouth. Feeding on the blood of other fish, these parasitic jawless fish can usually be found in both coastal waters and rivers in temperate regions. Usually, lampreys are treated as pests because of their invasive nature Read More…

Bolivian fish ponds supported ancient human settlement

Earth.Com – According to a new study, led by Gabriela Prestes-Carneiro of Federal University of Western Para, Brazil, a network of fish ponds in the seasonal drylands of Bolivia supported a permanent human settlement about 1,000 years ago. This research shows how exactly humans modified their environment to support themselves through the months-long Amazon Basin droughts. Previous Read More…

It’s What’s Inside that Counts, Unless You’re a Robotic Fish

USC Viterbi – When humans first conceived of robots, they were clunky, made of sheets of aluminum and steel that prevented them from moving fluidly. Even from a distance, there was no chance of mistaking a robot for a human—or any other type of living creature. Using computer-aided design (CAD) modeling, a team of student engineers, working with Dr. Satyandra K. Gupta, Smith Read More…

Satellite tags reveal what’s eating older Chinook salmon

University of Alaska Fairbanks – Sometimes being a scientist requires a bit of detective work. Andy Seitz, a researcher at the University of Alaska Fairbanks College of Fisheries and Ocean Sciences, had to put on his detective hat when an alarming number of his fish tags started popping up to the surface of the ocean early. “At first we speculated an equipment malfunction,” Seitz Read More…

Sea lampreys could help pave the way for new brain cancer treatments

Earth.Com – Sea lampreys are a parasitic fish that could help scientists develop new treatments targeting brain tumors, brain trauma, and even dementia, according to a new study. Researchers from the University of Wisconsin-Madison and the University of Texas at Austin found a way to turn sea lamprey molecules into drug delivery mechanisms that directly reach brain tumors, succeeding Read More…

How is climate change affecting fishes? There are clues inside their…

The Conversation – Climate change affects all life on Earth, but it poses unique challenges for aquatic species. For example, as water warms it holds less dissolved oxygen than cooler water. As a result, the world’s oceans, coastal seas, estuaries, rivers and lakes are undergoing a process known as “deoxygenation.” When dissolved oxygen levels fall to about 2 milligrams per liter Read More…

VHCC students dissect non-native fish to study habitat changes

Herald Courier – Students at Virginia Highlands Community College are learning that fish bones can be good storytellers. Nearly 40 students — not all of them biology majors — dissected fish recently in search of a special type of ear bone called an otolith, which can reveal the age of fish. The purpose of the research project is to learn more about the population growth of the Read More…

Loud EDM at Ultra Music Fest Significantly Stressed Out Nearby Fish,…

Pitchfork – A new study from the University of Miami has found that high sound levels from Ultra Music Festival 2019 caused “a significant stress response” in fish swimming in waters near the EDM festival's site, similar to the stress levels that they would experience if they were being chased by a predator. Following the study’s release, Ultra announced that it is seeking a new South Read More…

Most large rivers don’t flow freely anymore

Popular Science – Dammed up, drained, and dredged of sediment, the Earth’s rivers aren’t doing so well. And a new study shows that the number of free-flowing rivers, which move unimpeded on their route toward the ocean, is even lower than we previously thought. Of the 246 rivers longer than 621 miles, only about a third flow freely across their entire length, according to the study, Read More…