Some good news this week about the Irrawaddy dolphins of the Mekong River. A joint report from the Cambodian government and the World Wildlife Foundation tells how, following decades of seemingly irreversible decline, the population is increasing. They report the number of dolphins in the region has risen from 80 to 92 in the past two years—the first increase since scientists began keeping records more than twenty years ago. The first official census in 1997 estimated that there were 200 Irrawaddy dolphins in the Mekong, a figure that fell steadily due to bycatch and habitat loss. By 2015, only 80 dolphins remained. The recent census showed that more dolphins are surviving into adulthood, and there’s been a significant drop in overall deaths. Nine calves were born this year, raising the number of dolphins born in the past three years to 32. Seng Teak, Country Director of WWF Cambodia, said the census had positive implications for the Greater Mekong region, wher...
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