February 20, 2020 — The following was released by NOAA Fisheries:
Today, there are only about 400 North Atlantic right whales left and it is estimated that only 85 are reproductively active females. The survival and reproductive success of these remaining females and their offspring is critical to right whale recovery.
Female North Atlantic right whales are not living as long as they once did and more females than males have been reported dead in recent years. Today, females make up approximately 40 percent of the population. It is thought that the energetic stress of reproduction makes female right whales more susceptible than males to dying from entanglement or ship strike injuries.
Biologists also believe that injuries and stress caused by long-term entanglements is one of the reasons that females are calving less often. Studies suggest that more than 85 percent of North Atlantic right whales have been entangled in fishing gear at least once. About 60 percent have been entangled multiple times.