Featured Research

from universities, journals, and other organizations

Researchers discover rare new species of deep-diving whale

Date:
February 5, 2014
Source:
University of New South Wales
Summary:
Researchers have identified a new species of mysterious beaked whale based on a study of seven animals stranded on remote tropical islands over the past 50 years. The first was found on a Sri Lankan beach in 1963. A combination of DNA analysis and physical characteristics was used to make the identification.

Male specimen of Mesoplodon hotaula that washed up on Desroches Island in the Seychelles in 2009, shown with men from the island. It was found by Wayne Thompson (far right in picture) and Lisa Thompson of the Island Conservation Society of the Seychelles.
Credit: Lisa Thompson

Researchers have identified a new species of mysterious beaked whale based on the study of seven animals stranded on remote tropical islands in the Indian and Pacific Oceans over the past 50 years.

Beaked whales, a widespread but little-known family of toothed whales distantly related to sperm whales, are found in deep ocean waters beyond the edge of the continental shelf throughout the world's oceans.

"They are rarely seen at sea due to their elusive habits, long dive capacity and apparent low abundance for some species. Understandably, most people have never heard of them," says international team leader, Dr Merel Dalebout, a visiting research fellow at UNSW.

The study of the new species, Mesoplodon hotaula, is published in the journal Marine Mammal Science.

The first specimen was a female found on a Sri Lankan beach more than 50 years ago.

On 26 January 1963, a 4.5 metre-long, blue-grey beaked whale washed up at Ratmalana near Colombo. The then director of the National Museums of Ceylon, P.E.P (Paulus) Deraniyagala, described it as a new species, and named it Mesoplodon hotaula, after the local Singhala words for 'pointed beak'.

However, two years later, other researchers reclassified this specimen as an existing species, Mesoplodon ginkgodens, named for the tusk-like teeth of the adult males that are shaped like the leaves of a ginkgo tree.

"Now it turns out that Deraniyagala was right regarding the uniqueness of the whale he identified. While it is closely related to the ginkgo-toothed beaked whale, it is definitely not the same species," says Dr Dalebout.

The researchers used a combination of DNA analysis and physical characteristics to identify the new species from seven specimens found stranded in Sri Lanka, the Gilbert Islands (now Kiribati), Palmyra Atoll in the Northern Line Islands near Hawai'i, the Maldives, and the Seychelles.

The new specimens are held by various institutions and groups, including the US Smithsonian National Museum in Washington DC, the Island Conservation Society in the Seychelles, and the University of Auckland, New Zealand. The genetic analyses were conducted as part of an international collaboration with the US NMFS Southwest Fisheries Science Center and Oregon State University.

The researchers were able to get good quality DNA from tissue samples from only one specimen. For the others, they drilled the bones of the whales in order to analyse short fragments of 'ancient DNA' relying on techniques commonly used with old sub-fossil material from extinct species.

The researchers also studied all other known beaked whale species to confirm the distinctiveness of Deraniyagala's whale, including six specimens of the closely related, gingko-toothed beaked whale.

"A number of species in this group are known from only a handful of animals, and we are still finding new ones, so the situation with Deraniyagala's whale is not that unusual," Dr Dalebout says.

"For example, the ginkgo-toothed beaked whale, first described in 1963, is only known from about 30 strandings and has never been seen alive at sea with any certainty. It's always incredible to me to realise how little we really do know about life in the oceans. There's so much out there to discover. "

Over the last 10 years or so, two other new beaked whales have come to light; both through research in which Dr Dalebout was involved. In 2002, Mesoplodon perrini or Perrin's beaked whale, was described from the eastern North Pacific, and in 2003, Mesoplodon traversii, the spade-toothed whale, was described from the Southern Ocean. Both species are known from only about five animals each.

With the re-discovery of Mesoplodon hotaula, there are now 22 recognised species of beaked whales.


Story Source:

The above story is based on materials provided by University of New South Wales. Note: Materials may be edited for content and length.


Journal Reference:

  1. Merel L. Dalebout, C. Scott Baker, Debbie Steel, Kirsten Thompson, Kelly M. Robertson, Susan J. Chivers, William F. Perrin, Manori Goonatilake, R. Charles Anderson, James G. Mead, Charles W. Potter, Lisa Thompson, Danielle Jupiter, Tadasu K. Yamada. Resurrection ofMesoplodon hotaulaDeraniyagala 1963: A new species of beaked whale in the tropical Indo-Pacific. Marine Mammal Science, 2014; DOI: 10.1111/mms.12113

Cite This Page:

University of New South Wales. "Researchers discover rare new species of deep-diving whale." ScienceDaily. ScienceDaily, 5 February 2014. <www.sciencedaily.com/releases/2014/02/140205103540.htm>.
University of New South Wales. (2014, February 5). Researchers discover rare new species of deep-diving whale. ScienceDaily. Retrieved October 22, 2014 from www.sciencedaily.com/releases/2014/02/140205103540.htm
University of New South Wales. "Researchers discover rare new species of deep-diving whale." ScienceDaily. www.sciencedaily.com/releases/2014/02/140205103540.htm (accessed October 22, 2014).

Share This



More Plants & Animals News

Wednesday, October 22, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Cadaver Dogs Aid Search for More Victims of Suspected Indiana Serial Killer

Cadaver Dogs Aid Search for More Victims of Suspected Indiana Serial Killer

Reuters - US Online Video (Oct. 21, 2014) Police in Gary, Indiana are using cadaver dogs to search for more victims after a suspected serial killer confessed to killing at least seven women. Linda So reports. Video provided by Reuters
Powered by NewsLook.com
White Lion Cubs Unveiled to the Public

White Lion Cubs Unveiled to the Public

Reuters - Light News Video Online (Oct. 21, 2014) Visitors to Belgrade zoo meet a pair of three-week-old lion cubs for the first time. Tara Cleary reports. Video provided by Reuters
Powered by NewsLook.com
'Cadaver Dog' Sniffs out Human Remains

'Cadaver Dog' Sniffs out Human Remains

AP (Oct. 21, 2014) Where's a body buried? Buster's nose can often tell you. He's a cadaver dog, specially trained to find human remains and increasingly being used by law enforcement and accepted in courts. These dogs are helping solve even decades-old mysteries. (Oct. 21) Video provided by AP
Powered by NewsLook.com
White Lion Cubs Born in Belgrade Zoo

White Lion Cubs Born in Belgrade Zoo

AFP (Oct. 20, 2014) Two white lion cubs, an extremely rare subspecies of the African lion, were recently born at Belgrade Zoo. They are being bottle fed by zoo keepers after they were rejected by their mother after birth. Duration: 00:42 Video provided by AFP
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:

Strange & Offbeat Stories


Plants & Animals

Earth & Climate

Fossils & Ruins

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins