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Hydraulic Fracturing Fluids Likely Harmed Threatened Kentucky Fish Species

By Guest PostAugust 29, 2013Environmentacorn fork, appalachian creek, aquatic species, blackside dace, colorful minnow, cumberland, cumberland river basin, diana papoulias, gas well, gill lesions, heavy metals, hydraulic fracturing fluids, kentucky, powell river basin, ray finned fish, toxic concentration, virginia, water quality samples, wildlife

Hydraulic fracturing fluids are believed to be the cause of the widespread death or distress of aquatic species in Kentucky’s Acorn Fork, after spilling from nearby natural gas well sites. These findings are the result of a joint study by the U.S. Geological Survey and the U.S. Fish and Wildlife Service.

The Acorn Fork, a small Appalachian creek, is habitat for the federally threatened Blackside dace, a small colorful minnow. The Acorn Fork is designated by Kentucky as an Outstanding State Resource Waters. (more…)

From obscurity to dominance: Tracking the rapid evolutionary rise of ray-finned fish

By Guest PostAugust 6, 2013Nature, Scienceadaptive radiation, age of fish, backboned animals, darwins comment, devonian era, end devonian extinction, evolutionary biologist, evolutionary rise, fossils from scotland, fouldenia, glaciers, hangenberg extinction, japanese amberjack, john megahan, lauren sallan, long extinct fish, mass extinctions, michael coates, misclassified fouldenia, oceans, post devonian tetrapods, predatory fish, ray finned fish, romers gap, sea levels, shell crushing, styracopterus, tropics, university of chicago, university of michigan, vertebrate species, yellowtail

ANN ARBOR — Mass extinctions, like lotteries, result in a multitude of losers and a few lucky winners. This is the story of one of the winners, a small, shell-crushing predatory fish called Fouldenia, which first appears in the fossil record a mere 11 million years after an extinction that wiped out more than 90 percent of the planet’s vertebrate species.

The extinction that ended the Devonian Era 359 million years ago created opportunities quickly exploited by a formerly rare and unremarkable group of fish that went on to become—in terms of the sheer number of species—the most successful vertebrates (backboned animals) on the planet today: the ray-finned fish. (more…)

Yale Study Reveals New Family Tree for Ray-Finned Fish

By Guest PostAugust 7, 2012Natureage of fishes, alex dornburg, bass, bonefishes, bonytongue fish, devonian period, dinosaurs, eels, evolutionary birthday, family tree, fishes, fossil record, freshwater, genetic analysis, kristen l kuhn, lineages of fish, mammals, ray finned fish, ron i eytan, salmon, second age, teleost fish, teleost lineages, teleosts, thomas near, tropical, tuna, yale university

The most common lineages of fish found today in oceans, lakes, and rivers evolved about the same time as mammals and birds, a new Yale University-led study shows.

The comparative genetic analysis of more than 200 fish species, reported the week of Aug. 6 in the Proceedings of the National Academy of Sciences, gave an earlier than expected evolutionary birthday to well-known teleost — or ray-finned — fish such as salmon, bass, or tuna.

The analysis also shows that the very earliest lineages of living teleost fish were eels and bonefishes, not tropical freshwater bonytongue fish as some scientists had proposed. (more…)

Tag Archives: ray finned fish

Hydraulic Fracturing Fluids Likely Harmed Threatened Kentucky Fish Species

From obscurity to dominance: Tracking the rapid evolutionary rise of ray-finned fish

Yale Study Reveals New Family Tree for Ray-Finned Fish