Marine Mammal Institute

A team of scientists from the United States and Russia has documented the longest migration of a mammal ever recorded – a round-trip trek of nearly 14,000 miles by a whale identified as a critically endangered species that raises questions about its status. The researchers used satellite-monitored tags to track three western North Pacific gray whales from their primary feeding ground off Russia’s Sakhalin Island across the Pacific Ocean and down the West Coast of the United States to Baja, Mexico. One of the tagged whales, dubbed Varvara, visited the three major breeding areas for eastern gray whales, which are found off North America and are not endangered. Results of their study are being published this week by the Royal Society in...

A decade ago, we set out to unravel deep ocean crime scenes we weren’t even sure existed. The crime? Endangered Steller sea lions were rapidly disappearing in parts of Alaska. Their numbers dropped by 80% in three decades, yet only rarely did anyone see or sample dead sea lions. Live sea lions studied in the summer when they haul out to breed seemed healthy and had healthy pups.

We wanted to know when, where, and why sea lions die. To unravel the mystery, we needed information from those animals that we don’t see, those that might not breed, those that might never come back ashore. So we ...

Scientists on a rugged mid-winter trip to the remote sub-Antarctic islands have confirmed a large contingent of endangered southern right whales are spending the colder months near Campbell Island. Previous work on this species had focused on the animals at Auckland Island, with some minimal work done at the more remote Campbell Island almost 20 years ago. Lead investigator Dr Leigh Torres, said the news was "exciting, exhilarating and a relief to hear."

A new paper by Ladd Irvine and other MMI researchers finds that the favored feeding areas of endangered blue whales along the US West Coast are crossed by heavily used shipping lanes. The paper, which was published today in PLoS ONE, notes that moving the shipping lanes off Los Angeles and San Francisco slightly could significantly decrease the probability of ships striking the whales. The analysis is the most comprehensive study of blue whales' movements ever conducted.

Scott Baker, associate director of Oregon State University's Marine Mammal Institute, agreed. "The often disreputable behavior of the whaling industry in the past, and some whaling nations today, does not inspire much confidence in a good faith return to commercial whaling," he said.

A new genetic study concludes that humpback whales in three different ocean basins are distinct from one another and should be considered separate subspecies. The new study builds on previous research led by MMI’s Dr. Scott Baker and published in December 2013, which identified five distinct populations of humpback whales in the North Pacific Ocean.

The GEMM Lab led a research expedition in January 2014 that collected observational, behavioral, and oceanographic data to prove the existence of a blue whale foraging ground in the South Taranaki Bight (STB) in New Zealand. Prior to this study, it was thought that blue whales only migrate through New Zealand waters, which is reflected in its listing by the New Zealand Threat Classification System as a Migrant, offering blue whales no distinct conservation protection. The GEMM Lab is currently planning a comprehensive research program to improve knowledge of this blue whale population by generating estimates of abundance, residency, and distribution in the STB. These are the data needed to ensure the...

Scott Baker, associate director of the Marine Mammal Institute at Oregon State University, said genetic identification showed that, in many cases, the mothers of calves were missing entirely from groups of whales that died in the stranding. This separation of mothers and calves suggests that strong kinship bonds are being disrupted prior to the actual stranding – potentially playing a role in causing the event.