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Irrawaddy dolphins are more susceptible to human conflict than most other dolphins that live farther out in the ocean. Drowning in gillnets is the main threat to them throughout their range. Between 1995 and 2001, 38 deaths were reported and 74% died as a result of entanglement in gillnets with large mesh sizes. [ 34 ]
The skulls and fins of Australian snubfins also have slight variations from the Irrawaddy dolphins. Similar to the Irrawaddy, the Australian snubfins feed on fish and fish eggs, crustaceans, and cephalopods. [16] The bodies of the female Australian snubfin dolphins can grow up to 2.3m while the male bodies can grow up to 2.7m. Like the ...
Bycatch in crab gillnets can reach up to 45% of the catch, and much is thrown out. Of the crabs caught, around 3 of every 10 caught are immature, and 1 or 2 are egg-bearing females. Gillnets in the Malampaya Sound have entangled dolphins, including the Irrawaddy dolphin. Up to a quarter of gillnets are lost each year, becoming ghost nets.
It closely resembles the Irrawaddy dolphin (of the same genus, Orcaella) and was not described as a separate species until 2005. The closest relative to the genus Orcaella is the killer whale, Orcinus orca. [citation needed] The Australian snubfin has three colors on its skin, while the Irrawaddy dolphin only has two. The skull and the fins ...
The false killer whale has been known to interact non-aggressively with some dolphins: the common bottlenose dolphin, the Pacific white-sided dolphin (Lagenorhynchus obliquidens), the rough-toothed dolphin (Steno bredanensis), the pilot whales, the melon-headed whale, the pantropical spotted dolphin (Stenella attenuata), the pygmy killer whale ...
Chilika fishermen state that when Irrawaddy dolphins and bottlenose dolphins meet in the outer channel, the former get frightened and are forced to return toward the lake. [37] Some Irrawaddy dolphins used to be sighted only along the inlet channel and in a limited portion of the central sector of the lake.
The Irrawaddy dolphin was once placed in the same family, though recent genetic evidence suggests these dolphins belong to the family Delphinidae. [ 10 ] [ 11 ] The narwhal is the only other species within the Monodontidae. [ 12 ]
Among the most well-known species in the river is the Irrawaddy dolphin (Orcaella brevirostris), a euryhaline species of oceanic dolphin with a high and rounded forehead, lacking a beak. It is found in discontinuous sub-populations near sea coasts and in estuaries and rivers in parts of the Bay of Bengal and South-East Asia.