Six Irrawaddy dolphin calves recorded in Cambodia in 2026
The story at a glance
Cambodian authorities reported that six Irrawaddy dolphin calves had been recorded in 2026 by 27 April. The sixth was sighted at Kampi pool in Kratie province on 27 April, bringing the official Mekong population tally to 118.2
The births are encouraging, but the tally needs careful interpretation. A technical study estimated 89 dolphins in 2020 using mark-resight modelling, and the available reporting does not show that the older estimate and current tally were produced using comparable methods.123
The story in brief
What you need to know
- The Cambodian government announcement, dated 28 April, described the calf sighting the previous day as the sixth recorded in the country during 2026. Fisheries researchers and WWF verified the observation, according to the announcement.2
- The figure of 118 is an official current tally, not a new formal abundance estimate in the material reviewed. The 2020 technical report put the population at 89, with a 95% confidence interval of 78 to 102, using mark-resight modelling.23
- The two figures should not be read as evidence of a measured population increase: the sources do not establish that they were calculated using the same methods. Mongabay also reports that the remaining Cambodian population is far below estimates from the late 1990s.123
- Fishing-related deaths remain a serious concern. The IUCN SSC Cetacean Specialist Group identifies fisheries mortality, particularly entanglement in gillnets, as a primary threat to Mekong dolphins.4
- The river habitat faces pressures as well as fishing risks. Specialist material identifies habitat loss or degradation, including altered river flows, while Mongabay also describes risks from dams across the Mekong Basin.14
Conservation context
Why this matters
The calf records are a positive sign for a population facing substantial pressures, but births alone do not establish recovery. Clear interpretation also depends on distinguishing an official tally from a formal, comparable population estimate, while keeping attention on the fishing and habitat threats identified by specialists.1234
The developing story
What happens next
The reporting leaves open whether a comparable formal abundance survey has been completed since 2020. Further evidence on calf survival, deaths caused by fishing gear and enforcement within protected habitat zones would help clarify how the population is faring.34
Established evidence
What we know
- The sixth calf of 2026 was sighted at Kampi pool in Kratie province on 27 April, and the government announcement put the official Mekong tally at 118.2
- The latest formal estimate in the supplied sources is 89 dolphins in 2020, with a 95% confidence interval of 78 to 102, based on mark-resight modelling.3
- Gillnet entanglement and habitat loss or degradation, including altered river flows, are identified as primary threats by the IUCN SSC Cetacean Specialist Group.4
Open questions
What we don't know
- The available sources do not establish whether a formal abundance survey using a method comparable with the 2020 mark-resight estimate has since been completed.23
- The sources do not say how many of the calves recorded in 2026 will survive beyond their first year.12
- The supplied reporting does not provide the latest evidence on deaths from fishing gear or enforcement within protected habitat zones.14
Source coverage
