BANGKOK — The world’s largest recorded freshwater fish, a large stingray, has been caught within the Mekong River in Cambodia, in line with scientists from the Southeast Asian nation and the United States.
The earlier report for a freshwater fish was a 293-kilogram (646-pound) Mekong large catfish, found in Thailand in 2005, the group mentioned.
The stingray was snagged by an area fisherman south of Stung Treng in northeastern Cambodia. The fisherman alerted a close-by crew of scientists from the Wonders of the Mekong mission, which has publicized its conservation work in communities alongside the river.
The scientists arrived inside hours of getting a post-midnight name with the information, and have been amazed at what they noticed.
“Yeah, whenever you see a fish this dimension, particularly in freshwater, it’s exhausting to grasp, so I feel all of our crew was surprised,” Wonders of the Mekong chief Zeb Hogan mentioned in a web based interview from the University of Nevada in Reno. The college is partnering with the Cambodian Fisheries Administration and USAID, the U.S. authorities’s worldwide improvement company.
Freshwater fish are outlined as those who spend their whole lives in freshwater, versus large marine species reminiscent of bluefin tuna and marlin, or fish that migrate between contemporary and saltwater like the large beluga sturgeon.
The stingray’s catch was not nearly setting a brand new report, he mentioned.
“The indisputable fact that the fish can nonetheless get this large is a hopeful signal for the Mekong River, ” Hogan mentioned, noting that the waterway faces many environmental challenges.
The Mekong River runs via China, Myanmar, Laos, Thailand, Cambodia and Vietnam. It is residence to a number of species of large freshwater fish however environmental pressures are rising. In explicit, scientists concern a significant program of dam constructing lately could also be severely disrupting spawning grounds.
“Big fish globally are endangered. They’re high-value species. They take a very long time to mature. So in the event that they’re fished earlier than they mature, they don’t have an opportunity to breed,” Hogan mentioned. “A variety of these large fish are migratory, so that they want giant areas to outlive. They’re impacted by issues like habitat fragmentation from dams, clearly impacted by overfishing. So about 70% of large freshwater fish globally are threatened with extinction, and all the Mekong species.”
The crew that rushed to the positioning inserted a tagging system close to the tail of the mighty fish that may ship monitoring info for the following 12 months, offering unprecedented knowledge on large stingray conduct in Cambodia.
“The large stingray is a really poorly understood fish. Its identify, even its scientific identify, has modified a number of instances within the final 20 years,” Hogan mentioned. “It’s discovered all through Southeast Asia, however we’ve virtually no details about it. We don’t learn about its life historical past. We don’t learn about its ecology, about its migration patters.”
Researchers say it’s the fourth large stingray reported in the identical space prior to now two months, all of them females. They assume this can be a spawning hotspot for the species.
Local residents nicknamed the stingray “Boramy,” or “full moon,” due to its spherical form and since the moon was on the horizon when it was freed on June 14. In addition to the distinction of getting caught the record-breaker, the fortunate fisherman was compensated at market price, which means he acquired a cost of round $600.
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