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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 Irrawaddy dolphin shares similar physical characteristics with the beluga whale, but its genetic makeup ties the Irrawaddy dolphin and the killer whale as close relatives of one another. [13] Irrawaddy dolphins have a slate blue to a slate gray color and their bodies can grow up to 180-275 centimeters in length. [14]
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 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 ]
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 ...
Irrawaddy dolphin. Based on a survey in 2001, fewer than 70 Irrawaddy dolphins (Orcaella brevirostris) remain in the upper region of the Malampaya Sound in the Philippines and only 69 individuals in the Mekong River. [13] They have been severely impacted by lift nets and crab gear, thus critically endangered.
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The Don Sahong Hydropower Project would pose a major threat to the Mekong River's critically endangered population of Irrawaddy dolphin. [28] The risk is considered very high for the small resident sub-population living in the Veun Nyang/Anlong Cheuteal pool that straddles the Lao/Cambodian border, and is the only remaining dolphin population ...