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Overfishing in the Mekong

In the just published report ‘From Sea to Source 2.0’, on the migration of fish, we come across this graph. It shows the consequences of overfishing of the giant catfish in the Mekong, based on a study in BioScience by J.D. Allan. It shows fish catches (yield) as a function of effort for the Mekong giant catfish fishery in Chiang Khong, Thailand. The initial increase in boats employed results in higher yields, but is then followed by a crash of the fish stocks. According to ‘From Sea to Source 2.0’, not only overfishing, but also industrialisation, climate change, water quality deterioration, and other threats have seriously hampered fish migration, that is needed for many fish to to fulfil their entire lifecycle. (source)

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