Dolphins

Maine lobster fishermen received a Christmas gift from Congress at the end of 2022: A six-year delay on new federal regulations designed to protect critically endangered North Atlantic right whales. The rules would have required lobstermen to create new seasonal nonfishing zones and further reduce their use of vertical ropes to retrieve lobster traps from the seafloor. Entanglement in fishing gear and collisions with many types of ships are the leading causes of right whale deaths. Maine’s congressional delegation amended a federal spending bill to delay the new regulations until 2028 and called for more research on whale entanglements and ropeless fishing gear. Conservationists argue that the delay could drive North Atlantic right whales, which number about 340 today, to extinction. This is the latest chapter in an ongoing and sometimes fraught debate over fishing gear and bycatch – unintentionally caught species that fishermen don’t want and can’t se...

Bottlenose dolphins in Sarasota Bay in Florida and Barataria Bay in Louisiana are exhaling microplastic fibers, according to our new research published in the journal PLOS One. Tiny plastic pieces have spread all over the planet – on land, in the air and even in clouds. An estimated 170 trillion bits of microplastic are estimated to be in the oceans alone. Across the globe, research has found people and wildlife are exposed to microplastics mainly through eating and drinking, but also through breathing. A plastic microfiber found in the exhaled breath of a bottlenose dolphin is nearly 14 times smaller than a strand of hair and can be seen only with a microscope. Miranda Dziobak/College of Charleston, CC BY-SA Our study found the microplastic particles exhaled by bottlenose dolphins (Tursiops truncatus) are similar in chemical composition to those identified in human lungs. Whether dolphins are...