Sharks were a tolerant bunch some 50 million years ago, cruising an Arctic Ocean that contained about the same percentage of freshwater as Louisiana’s Lake Ponchatrain does today, says a new study involving the University of Colorado Boulder and the University of Chicago. The study indicates the Eocene Arctic sand tiger shark, a member of […]
New species of prehistoric, plankton-eating shark discovered
An international team of scientists has discovered a new lineage of extinct plankton-feeding sharks, Pseudomegachasma, that lived in warm oceans during the age of the dinosaurs nearly 100 million years ago. The fossil sharks had tiny teeth very similar to a modern-day, plankton-eating megamouth shark. The study, “A new clade of putative plankton-feeding sharks from […]
Study finds sharks high in neurotoxins linked to Alzheimer’s
In a new study, University of Miami (UM) scientists found high concentrations of toxins linked to neurodegenerative diseases in the fins and muscles of 10 species of sharks. The research team suggests that restricting consumption of sharks can have positive health benefits for consumers and for shark conservation, since several of the sharks analyzed in […]
Monogamy could hinder long-term tiger shark populations
Tiger sharks appear to be genetically monogamous – and it could be putting the species at risk. University of Queensland research has found tiger sharks differ from many other sharks in that they don’t use multiple paternity as a reproductive strategy. UQ researcher Dr. Bonnie Holmes said multiple paternity occurred when a single litter of […]
Biologists, aerospace engineers team up to study oceanic whitetips
MIAMI– Oceanic whitetip sharks move with extreme efficiency, exploiting physics to maximize their energy surplus for both hunting and downtime. A team of scientists that included shark biologists, an aerospace engineer and statisticians spent several years developing precise calculations based on the oceanic whitetip’s average size, swimming location, water temperatures, location of prey in the […]
Research shows complex social network of sharks
Although historically seen as solitary animals, new research being presented here shows sharks may have a more complex social structure than previously thought. Using tracking devices to trace the movements of individual animals in the open ocean, researchers found that Sand Tiger sharks form complex social networks that are typically seen in mammals but rarely […]
New shark named after Alabama coaching legend Bear Bryant
A new species of ancient shark has been named in honor of Alabama football coaching legend Paul “Bear” Bryant. The species, Cretalamna bryanti, was discovered by scientists studying fossils housed in the collections of the McWane Science Center and the Alabama Museum of Natural History. The large-toothed shark lived during the Late Cretacious Period nearly 83 […]
Study shows shark species can be vegetarians
A new study presented at the Society of Integrative and Comparative Biology’s annual meeting showed that bonnethead sharks can survive on a vegetarian diet. The research by Samantha Leigh, a doctoral candidate at the University of California-Irvine, examined the stomach contents for the species and found that over 60 percent of the material in their stomachs of younger specimens was […]
Tagged tiger shark shows lengthy migration path
Not freezing temperatures or nor’easters or Hurricanes Harvey, Irma, Jose or Maria can stop “Andy,” a tiger shark tagged in Bermuda by scientists from Nova Southeastern University’s (NSU) Guy Harvey Research Institute (GHRI) in 2014. Travelling approximately 37,565 miles off the eastern coast of the United States and around Bermuda, the Bahamas and Turks and […]
Great whites popping up off the coast of Florida
With water temperatures plummeting throughout their usual habitats, great white sharks sightings off the coast of Florida have been plentiful recently. The behavior has become a regular occurrence for the species as they seek the warmer water and ample feeding grounds of the Sunshine State. Savannah, a 460-pound female shark that was tagged as part […]
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