Determining the mutation rate of cetaceans is not an easy task, as it is difficult to locate and sample them. Photo: Julia Hager Before commercial whaling began, the number of humpback whales in the North Atlantic was apparently 86 percent lower than previously...
Orcas roam wider areas in the U.S. Pacific Arctic due to the lack of sea ice and encounter new prey. Photo: Holly Fearnbach, NOAA Fisheries Originally, orcas rarely visited arctic waters, as sea ice was too dangerous for them. However, with climate change and...