🔗 Share this article Alarming Decline in Migrating Fish Populations Triggers Global Battle for Conservation The Atlantic tarpon migrates long routes along shorelines but confronts population drops as its mangrove homes are damaged. Aquatic species that make massive journeys through inland waterways are facing a combined risk from human-made barriers, contaminants, and excessive harvesting hindering them from reaching their reproductive areas. Species like the golden mahseer and giant devil catfish are among thirty priority species which have now been recommended for global conservation by the United Nations in a new assessment. "Freshwater fish sustain countless numbers of communities globally, so for humans, they're incredibly vital," stated a lead scientist on the assessment. A team of international experts examined more than 15,000 types of freshwater migratory fish – which make up 50% of all known fish – and determined their populations had dropped by an estimated 81% in the last half century. The researchers said that for too long, this class of species has been ignored but "constitute an vital part of human livelihoods." The piraÃba – another migratory fish species – has been suggested for immediate conservation. Overfishing and Habitat Loss The shorter group is made up of fish that are both at risk and also important for traditions for global communities. "As an instance, the golden mahseer is an iconic fish of the Himalayan region. Many people in that area cherish that fish for traditional and sacred purposes that go far beyond economic worth," noted a freshwater specialist who contributed to the report. Similar to other fish on the roster, it is confronting two primary pressures: excessive fishing and loss of home. "Environmental degradation encompasses things like dams that divide a river system, and can change the normal water flow of a river, which causes fish not being able to access their breeding grounds," the scientist added. The jawless fish has undergone major number decline in certain areas due to pollution. Disruption to migratory routes is an issue that is especially common in Europe, where fish face a obstacle to their paths frequently. In many cases the obstructions are minor structures that are no longer needed and could be removed, explained an conservation science lead. But the cumulative impact on migrating fish is massive: "It can have a massive effect in terms of the strength fish are expending to navigate the [barriers]." That makes them more prone to disease. They're more likely to get eaten. They will breed in suboptimal locations." Back from the Brink The majority of fish will cross national borders on their extensive journeys. This demands coordinated actions between governments to address these issues and secure the rebounding of national stocks, explained a study contributor. The global treaty on migratory species is a worldwide UN agreement signed in 1979 which commits signatories to cooperate to protect migratory species of all kind. The UN is now recommending that the 30 fish species be listed to the treaty at its yearly meeting in the coming years. The saiga antelope is an example of species that have rebounded following coordinated recovery programs. The distinctive antelope is an case study of a species that has profited from being included under the treaty. Following a population crash, an global anti-poaching effort was created and since then numbers have recovered substantially. "Conservation efforts has traditionally been on some of the more well known species, such as whales," said a senior conservation representative. She added it was now the turn of river fish to gain from coordinated action.