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Dead whale near Tenakee Springs likely killed by vessel strike
Vessel strikes with whales in Alaska appear to be increasing

 

August 30, 2010
Monday


A deceased humpback whale sighted near Tenakee Springs this month likely died as a result of injuries from a vessel strike, say NOAA Fisheries scientists who performed a necropsy on the carcass recently.


jpg NOAA Fisheries scientists conducting a necropsy of a humpback whale near Tenakee Springs, Alaska

NOAA Fisheries scientists conducting a necropsy of a humpback whale near Tenakee Springs, Alaska
Photo courtesy NOAA


The humpback whale was first reported floating near Tenakee Springs early the morning of August 19th. NOAA's National Marine Fisheries Service authorized volunteers in the Marine Mammal Stranding Network to tow the carcass away from town to a beach appropriate for a necropsy.

"This 30-foot long male had marked internal injuries, bruising and hemorrhage indicative of death by high impact, blunt force trauma" said Dr. Kate Savage, a veterinarian with NOAA who led the necropsy.

Researchers will try to identify the whale by comparing markings on its tail fluke to photos in Southeast Alaska humpback whale catalogues. They also collected one of the whale's eyes, which can be used to determine the whale's age.

Reported incidents of vessel strikes with whales in Alaska appear to be increasing in recent years. At this stage, it is difficult to determine whether this is due to a greater reporting effort or whether it truly reflects an increase in incidents. Regardless, the incidence of collisions is likely to increase in the future, as the North Pacific humpback whale population continues to recover at the same time numbers of vessels in Southeast Alaska are also increasing. Currently, more than 3,000 humpback whales swim in the waters of Southeast Alaska, where nearly 80-percent of Alaska's reported whale-vessel collisions occur.

To protect humpback whales and reduce the risk of strike, NOAA Fisheries asks mariners to slow their speeds when traveling through known whale waters, and/or when whales are sighted nearby. This is crucial for large and small vessel alike; about half of reported whale strikes in Southeast Alaska involve small private recreational vessels.

Sightings of whales or other marine mammals in distress can be reported to the NOAA Fisheries Marine Mammal Hotline at (877) 925-7773.

 

Source of News:

NOAA Fisheries in Alaska
alaskafisheries.noaa.gov
www.afsc.noaa.gov.

 

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