Kerala’s flood ‘fugitives’ Banner image: An alligator gar caught from a river in Kerala after the 2018 floods. Copyright © 2020. These post-flood field surveys revealed that fishers had caught arapaima and gar from four flood-affected rivers in Kerala: the Periyar, Muvattupuzha, Kurumali and Chalakkudy. “To be billed as an invasive, the species must proliferate to unnatural abundances in the habitats where they get naturalised, and also outcompete other species,” he wrote in an email. For instance, in the case of the African catfish, identifying “recruitment areas” from where invasive fish fingerlings could be dispersing to other connected habitats such as swamps and wetlands (habitats with standing vegetation and slush where the catfish thrives very well and breeds) could be important, added Basheer. Photos from Biju Kumar. Temperature: Arapaima live best from about 75 to 80-degrees F. with 78 being perhaps ideal. Featured Today 11-28-2020. The arapaima fish, native to the Amazon River basin, can weigh as much as 400 pounds (180 kilograms). The illegally-introduced species is fast becoming a major concern in the state, says Basheer, who is part of an NBFGR project to study the impacts of exotic fish species in Indian waters, “Populations of African catfish are rapidly increasing in some waterbodies in Kerala, such as the Mattupetty, Aanayirangal and Periyar reservoirs of Idukki district,” he says. And the team recorded only six arapaima and gar in total: a number that seems barely enough to ‘threaten’ river systems. Clear definitions of when a species is invasive in the real sense and causes ecosystem- and fisheries-level impacts are also crucial, he said. For instance, in the case of the African catfish, identifying “recruitment areas” from where invasive fish fingerlings could be dispersing to other connected habitats such as swamps and wetlands (habitats with standing vegetation and slush where the catfish thrives very well and breeds) could be important, added Basheer. But though neither of the fish seems to have established “sustaining populations” in any of these river systems, their presence here is still a cause for concern, claims Kumar, professor and head of the Department of Aquatic Biology and Fisheries at the University of Kerala. “However, there is no data on this, as most of the farms that were growing these fish are illegal and no one has background information on the number of fish stocked in these ponds along these flood plains.”. But this diversity is at risk due to ‘fugitive’ fish such as the arapaima and gar that escaped from aquaculture facilities and farms during the floods, claim the authors. Very rare to see this awesome monster fish in the hobby! Feeding: Premium Fish Food Pellets is best to feed to Arapaima. Also find here related product comparison | ID: 20067869648 “The customs handle violations that occur at the frontiers such as seaports and airports and there have been recent instances of seizing some prohibited fish species too,” he said. But unless we know the numbers of these aliens in our river systems or their reproductive status, it would be impossible to make predictions, he added. “This species could have a bigger chance to proliferate in Kerala’s freshwater habitats than the arapaima,” he says. London: Reports indicate that the arapaima, a giant species of fish that lurks in the Amazon river, may be threatened by overfishing. 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