Logo of Phnom Penh Post newspaper Phnom Penh Post - Big-name divers explore deepest Mekong pools in key fauna survey

Big-name divers explore deepest Mekong pools in key fauna survey

Content image - Phnom Penh Post
The group of underwater explorers dived about 75m below the surface of the Mekong River in Cambodia. WONDER OF MEKONG

Big-name divers explore deepest Mekong pools in key fauna survey

A group of well-known underwater explorers have dived to a depth of about 75m below the surface of the Mekong River in Cambodia, an important body of water that is the last habitat of the world’s largest freshwater fish.

The deepest exploration mission ever carried out in the Mekong is an international effort led by the US Agency for International Development (USAID) under the Wonders of the Mekong project, which began on April 23 and finished on April 27.

“We are exploring deep into the Mekong, another world – a realm within a hidden realm, a pitch-black space inhabited by rare and unusual fish like the Mekong giant stingray and giant catfish,” said Zeb Hogan, a fish biologist and leader of the USAID-funded project.

The area that the scientists will focus on is located just downstream of a Ramsar wetland of international importance. The region is dominated by flooded forests, rocky outcrops, sand bars, braided channels, deep pools and rapids and riffles. This area also is home to many of the Mekong’s more than 1,000 fish species, including the bizarre two-faced carp, giant goonch catfish, and the striped catfish, once a staple food in Cambodia.

Researchers believe that these areas are critically important as dry-season fish refuges and important spawning areas, and perhaps as the last habitat of several endangered giant fish. It is a region that is recognised as special and protected by local communities.

To study these important areas, Hogan – and project co-leader Sudeep Chandra – teamed up with biologists from the Fisheries Faculty of the Royal University of Agriculture; deep sea researcher Kakani Katija and her team from the Monterey Bay Aquarium Research Institute; and Kenny Broad, University of Miami professor, environmental scientist, cave diver, and the 2011 National Geographic Explorer of the Year. They are all specialists in the exploration and study of extreme underwater habitats.

In a press release seen by The Post on April 29, Hogan said: “The biggest challenge will be getting down to the bottom. Its deepest areas are below sea level. Besides being dark and silent, the waters could be obscured by particulates.”

For their exploration, the team used unmanned submersibles equipped with lights and cameras, drop cameras suspended on long cables, and use baited video cameras as their eyes and ears. To assess the foreign environment, equipment that measures depth and flow and maps the river bottom and currents were deployed.

The team’s basecamp are adjacent to one of the Cambodian Mekong’s deepest pools and a fish reserve designed to protect spawning fish. The area itself is dotted with islands occupied by small fishing camps, nomadic fishers that move from island to island, season to season. Upstream, across the border in Laos, is Khone Falls, the Mekong’s only main channel waterfall.

Hogan said that these deep pools may even have the potential of being used as introduction sites for endangered fish, similar to what the Wonders of the Mekong team did last month in the Tonle Sap Lake.

Chea Seila, programme manager for Wonders of the Mekong, said in the press release: “This is one of many Wonders of the Mekong projects that seeks to protect a healthy, connected river, and the people, fisheries, wildlife, and water quality that the river supports.”

Chhut Chheana, communications coordinator for USAID Wonders of the Mekong, told The Post on May 1: “The exploration was conducted in the Mekong Ramsar area, which is from Stung Treng provincial town to the Lao border.”

MOST VIEWED

  • ‘Education’ a priority traffic-law penalty

    A top National Police official on June 21 neither rejected nor confirmed the authenticity of a leaked audio message, which has gone viral on social media, on a waiver of fines for a number of road traffic-related offences. General Him Yan, deputy National Police chief in

  • Pursat Ford assembly plant opens

    The Kingdom’s first Ford assembly plant was inaugurated on June 16 in Pursat province amid rising demand for brand-new vehicles among Cambodians. The facility is seen as a game changer for the domestic automobile industry, which could bring a wave of investors seeking to cash

  • Volunteer scheme to foster ‘virtuous’ humanitarian spirit

    A senior education official said volunteer work contributes to solidarity and promotes a virtuous humanitarian spirit among the youth and communities. Serei Chumneas, undersecretary of state at the Ministry of Education, Youth and Sport, made the comment during the opening of a training programme called “

  • Siem Reap’s $18M zoo said to educate public, help wildlife

    Angkor Wildlife and Aquarium Co Ltd has invested $18 million in a zoo in Siem Reap province, which will be opened in October to educate and promote animal conservation as well as attract national and international tourists. Currently, the Angkor Wildlife and Aquarium is building the

  • $50B infrastructure plan en route

    The government’s upcoming $50 billion,10-year infrastructure master plan will provide tremendous investment opportunities for domestic and foreign entities, transport experts and economists say. Minister of Public Works and Transport Sun Chanthol revealed the plan to Japanese ambassador to Cambodia Masahiro Mikami on June 15. At

  • Chinese firms unveil preliminary results on metro, monorail for capital

    Minister of Public Works and Transport Sun Chanthol and representatives from China Road and Bridge Corp (CRBC) and its parent company, the state-owned China Communications Construction Co Ltd (CCCC), met on June 24 for talks on results of the firms’ preliminary study on a potential metro