New population of rare Irrawaddy dolphins found in Palawan

May 02, 2013
Some Irrawaddy dolphin populations are classified by IUCN as critically endangered. Credit: Mavic Matillano

A new Philippine population of critically-endangered Irrawaddy dolphins was reported recently by WWF-Philippines.

Spotted by chance off Quezon, Palawan in Western Philippines, this pod of rare marine mammals, locally called Lampasut, was observed displaying typical behavior, foraging for prey around lift net fish traps sitting approximately one kilometer offshore.

WWF staff reported seeing at least 20 individuals in just one sighting. This is a relatively large sized pod for this uncommon , where groups of fewer than six individuals are most common.

Previous populations of these have been documented in Malampaya Sound, as well as off the island of Panay.

The Quezon pod represents the fourth known group of Irrawaddy dolphins reported in the Philippines.

The Irrawaddy dolphin (Orcaella brevirostris), is a euryhaline species of oceanic dolphin.

With the ability to adapt to a wide range of salinities, this dolphin is found in discontinuous subpopulations near coasts and in estuaries and rivers in areas stretching from the to and the Philippines.

Lightly colored all over, Irrawaddy dolphins are similar to the in appearance. They have a blunt, rounded head, and an indistinct beak. Their dorsal fin is short, blunt and triangular.

In the wild, they have been seen spitting out streams of water, a rather unique and peculiar behavior.

Contrary to what some people believe, this animal is not a true river dolphin, but an oceanic dolphin that lives in brackish water near coasts, river mouths and in estuaries. 

This species enjoys the highest level of international protection. All trade is forbidden, under international agreements. Some Irrawaddy are classified by the IUCN as critically endangered.

This includes the Malampaya Sound sub-population in the Philippines. Irrawaddy dolphins in general however, are IUCN listed as a , which applies throughout their whole range.

In 2004, CITES transferred the Irrawaddy dolphin from Appendix II to Appendix I, which forbids all commercial trade in species that are threatened with extinction. The Irrawaddy dolphin is listed on both Appendixes I and II of the Convention on the Conservation of Migratory Species of Wild Animals.

Photos of the Quezon pod were captured, positively confirming species identity. For Palawan, this is a very good sign. Though wholly unexpected, this surprise is a tremendous new discovery to celebrate Earth Day in the Coral Triangle.

Explore further: Research helps steer mites from bees

add to favorites email to friend print save as pdf

Related Stories

18 endangered dolphins spotted off Borneo: WWF

Feb 07, 2012

Conservation group WWF said it spotted 18 critically endangered Irrawaddy dolphins in Indonesian waters off Borneo island Tuesday and called for greater protection of the species' habitat.

WWF calls for action to save Mekong dolphins

Aug 17, 2011

Conservation group WWF on Wednesday called for urgent action to prevent the extinction of freshwater dolphins in the Mekong River, including the creation of special conservation zones.

Bangladesh to set up dolphin sanctuaries

Oct 31, 2011

Bangladesh will declare three river areas in its southwest as dolphin sanctuaries, wildlife officials said Monday, in a bid to protect the country's population of endangered freshwater cetaceans.

Recommended for you

Research helps steer mites from bees

Sep 19, 2014

A Simon Fraser University chemistry professor has found a way to sway mites from their damaging effects on bees that care and feed the all-important queen bee.

Bird brains more precise than humans'

Sep 19, 2014

(Phys.org) —Birds have been found to display superior judgement of their body width compared to humans, in research to help design autonomous aircraft navigation systems.

User comments : 0