World Library  
Flag as Inappropriate
Email this Article

White-beaked dolphin

 

White-beaked dolphin

White-beaked dolphin
Size compared to an average human
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Subclass: Eutheria
Order: Cetacea
Suborder: Odontoceti
Family: Delphinidae
Genus: Lagenorhynchus
Species: L. albirostris
Binomial name
Lagenorhynchus albirostris
(Gray, 1846)
White-beaked dolphin range

The white-beaked dolphin (Lagenorhynchus albirostris) is a marine mammal belonging to the family Delphinidae (dolphins) in the suborder Odontoceti (toothed whales).

Contents

  • Taxonomy 1
  • Description 2
  • Distribution 3
  • Behavior 4
  • Conservation 5
  • See also 6
  • References 7
  • External links 8

Taxonomy

The species was first described by the British taxonomist John Edward Gray in 1846. Due to its relative abundance in European waters, it was among the first of the genus Lagenorhynchus (lagenos, Latin for "bottle" or "flask"; rhynchos, "beak" or "snout") to be known to science. Its specific name, albirostris, translates to "white beak", a reference to the color of the species' beak, a diagnostic (albeit variable) trait useful in identification.[2]

Description

Skeleton

The white-beaked dolphin is a robust species of dolphin with a short beak. Adults can reach 2.3 to 3.1 m (7 ft 7 in to 10 ft 2 in) long and weigh 180 to 354 kg (397 to 780 lb). Calves are 1.1 to 1.2 m (3 ft 7 in to 3 ft 11 in) long at birth and probably weigh about 40 kg (88 lb).[3] The dolphin is characterized by its short thick creamy-white beak and very falcate (curved) dorsal fin.

Distribution

The white-beaked dolphin is endemic to the North Atlantic Ocean and is found in a band stretching across the ocean from Cape Cod, the mouth of the St. Lawrence River and southern Greenland in the west, around Iceland in the centre, and across in the west from northern France to Svalbard; however, it is not well adapted to Arctic conditions[4] as are the beluga or narwhal. The dolphin may easily be misidentified as the Atlantic white-sided dolphin, although the white-beaked is commonly found further north. The white-beaked dolphin is also typically larger, and does not have yellow streaks on its side.

Behavior

A white-beaked dolphin off Iceland

The population, breeding pattern, and life expectancy of the dolphin are all unknown, although most sources estimate several hundred thousand individuals, more densely populated in the eastern North Atlantic than the west.

White-beaked dolphins are acrobatic and social animals. They will frequently ride on the bow wave of high-speed boats and jump clear of the sea's surface. The white-beaked dolphin is a social feeder and has frequently been observed feeding with killer, fin, and humpback whales, as well as other dolphin species.

Conservation

White-beaked dolphins off south east of Old Portlethen.

The North and Baltic Sea populations of the white-beaked dolphin are listed on Appendix II[5] of the Convention on the Conservation of Migratory Species of Wild Animals (

  • White-beaked dolphin research in Scotland White-beaked dolphins in Scottish waters, images
  • ARKive Photos, video, information.

External links

  • Whales Dolphins and Porpoises, Mark Carwardine, Dorling Kindersley Handbooks, ISBN 0-7513-2781-6
  • National Audubon Society Guide to Marine Mammals of the World, Reeves, Stewart, Clapham and Powell, ISBN 0-375-41141-0
  1. ^ Hammond, P.S., Bearzi, G., Bjørge, A., Forney, K., Karczmarski, L., Kasuya, T., Perrin, W.F., Scott, M.D., Wang, J.Y., Wells, R.S. & Wilson, B. (2008). Lagenorhynchus albirostris. In: IUCN 2008. IUCN Red List of Threatened Species. Retrieved 24 March 2009.
  2. ^ Reeves, Randall, Brent Stewart, Phillip Clapham and James Powell (2002). National Audubon Society Guide to Marine Mammals of the World. Knopf. pp. 395–397.  
  3. ^ Shirihai, H. and Jarrett, B. (2006). Whales, Dolphins and Other Marine Mammals of the World. Princeton Field Guides. pp. 199–200.  
  4. ^ Polar bears eating dolhins as waters warm Bloomberb News, retrieved June 12, 2015
  5. ^ "Appendix II" of the Convention on the Conservation of Migratory Species of Wild Animals (CMS). As amended by the Conference of the Parties in 1985, 1988, 1991, 1994, 1997, 1999, 2002, 2005 and 2008. Effective: 5 March 2009.
  6. ^ Convention on Migratory Species page on the White-beaked dolphin
  7. ^ Agreement on the Conservation of Small Cetaceans of the Baltic, North East Atlantic, Irish and North Seas

References

See also

In addition, the white-beaked dolphin is covered by the Agreement on the Conservation of Small Cetaceans of the Baltic, North East Atlantic, Irish and North Seas (ASCOBANS).[7]

[6]

This article was sourced from Creative Commons Attribution-ShareAlike License; additional terms may apply. World Heritage Encyclopedia content is assembled from numerous content providers, Open Access Publishing, and in compliance with The Fair Access to Science and Technology Research Act (FASTR), Wikimedia Foundation, Inc., Public Library of Science, The Encyclopedia of Life, Open Book Publishers (OBP), PubMed, U.S. National Library of Medicine, National Center for Biotechnology Information, U.S. National Library of Medicine, National Institutes of Health (NIH), U.S. Department of Health & Human Services, and USA.gov, which sources content from all federal, state, local, tribal, and territorial government publication portals (.gov, .mil, .edu). Funding for USA.gov and content contributors is made possible from the U.S. Congress, E-Government Act of 2002.
 
Crowd sourced content that is contributed to World Heritage Encyclopedia is peer reviewed and edited by our editorial staff to ensure quality scholarly research articles.
 
By using this site, you agree to the Terms of Use and Privacy Policy. World Heritage Encyclopedia™ is a registered trademark of the World Public Library Association, a non-profit organization.
 



Copyright © World Library Foundation. All rights reserved. eBooks from World eBook Library are sponsored by the World Library Foundation,
a 501c(4) Member's Support Non-Profit Organization, and is NOT affiliated with any governmental agency or department.