February 6, 2024 — The following was released by NOAA Fisheries:
On January 28, 2024, NOAA Fisheries was notified of a deceased female North Atlantic right whale near Joseph Sylvia State Beach on Martha’s Vineyard, Massachusetts. We worked closely with the International Fund for Animal Welfare, Stranding Network partners, and local responders to recover the carcass and conduct a necropsy.
Preliminary observations indicated the presence of rope entangled near the whale’s tail. State law enforcement officials collected some of the rope and turned it over to NOAA’s Office Law Enforcement. It is now being examined by gear experts.
Whale Identified as #5120
Last week, scientists at the New England Aquarium’s Anderson Cabot Center for Ocean Life reviewed several images of the dead North Atlantic right whale. They matched it to whale #5120 in the right whale catalog based on clear matching features, such as callosity patterns and markings. This right whale, the only known calf of Squilla (#3720), was born during the 2021 calving season.
Necropsy Confirms Chronic Entanglement
A stranding response team completed the necropsy of North Atlantic right whale #5120 on February 1, 2024. From the necropsy, experts confirmed a chronic entanglement, with rope deeply embedded in the tail, and thin body condition. The necropsy showed no evidence of blunt force trauma. Cause of death is pending further histological and diagnostic testing of collected samples, which can take weeks to complete. We will share more information as it is available.
Large whale experts at the International Fund for Animal Welfare led the necropsy, with the assistance of more than 20 biologists from:
- Wampanoag Tribe of Gay Head (Aquinnah)
- Atlantic Marine Conservation Society
- Whale Dolphin Conservation
- New England Aquarium
- Center for Coastal Studies
- Marine Mammals of Maine
- Virginia Aquarium
- Canadian Wildlife Health Cooperative
Previous Entanglements
Aerial survey teams had previously seen right whale #5120 several times with entanglements, including August 2022 and January 2023.
Whale #5120 was last seen in June 2023 by Northeast Fisheries Science Center aerial observers, 60 miles northeast of Shippagan, New Brunswick. She was feeding with other whales. Her overall condition had declined and the wounds from the wraps of rope at the peduncle appeared to be more severe. No trailing line or buoys were seen.
Studies suggest that more than 85 percent of North Atlantic right whales have been entangled at least once. About 60 percent have been entangled multiple times. Entangling rope can cut into a whale’s body, cause serious injuries, and result in infections and mortality. Even if gear is shed or removed through disentanglement efforts, the time spent entangled can severely stress a whale, weaken it, and prevent it from feeding. It can sap the energy it needs to swim, feed, and reproduce.