Irrawaddy Dolphin Biology:
- Name - Irrawaddy Dolphin (Orcaella brevirostris) see image.
- Euryhaline species of oceanic dolphin.
- Found in discontinuous sub-populations near sea coasts, in estuaries & rivers in Bay of Bengal & SE Asia region (ie including Mekong River).
- It is one of two species in the genus Orcaella, the other is the Australian Snubfin Dolphin.
- Belongs to the Delphinidae family.
- Genetically related to the Orca.
- Thought to reach sexual maturity at 7 to 9 yrs.
- Lifespan is ~ 30 years.
- Communicate with clicks, creaks & buzzes - also used for echolocation.
- Swims, making only occasional low leaps, and does not bow-ride.
- Swimming speed - is a slow swimmer, but speeds of up to 20–25 km/hour have been reported when these dolphins are chased in a boat.
- First described by Sir Richard Owen in 1866.
- First specimen found in 1852 from harbour of Visakhapatnam, India.
- IUCN Red List Status -
- Similar to beluga in appearance.
- Colour - grey to dark slate blue, paler underneath.
- Colour patterns - None distinctive.
- Forehead - High & rounded.
- Beak - not present.
- Dorsal fin - Small & rounded behind middle of back.
- Burmese - Labai
- Chilika dialect - Baslnyya Magar / Bhuasuni Magar
- English - Irrawaddy dolphin
- Filipino - Lampasut
- French - Orcelle
- German - Irrawadi Delphin
- Indonesia - Pesut
- Khmer - Ph’sout
- Lao - Pha’ka
- Malay - Lumbalumba
- Oriya - Khem & Khera
- Spanish - Delfín del Irrawaddy
- Thai - pía loma hooa baht
Irrawaddy Dolphin Swimming in Mekong River:
Image Credits Encyclopedia of Life (cc)
Posted by ALCHEssMIST.
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