The Chinese paddlefish, one of the largest freshwater fish has been declared extinct in a study published in the journal Science of the Total Environment.
- The Chinese paddlefish (Psephurus gladius) was an iconic species, measuring up to 7 m in length, dating back from 200 million years ago, and therefore swimming the rivers when dinosaurs ruled the Earth.
- Its ancestral home was the Yangtze River.
- Recently, Chinese researchers declared it extinct based on the Red List criteria of the International Union for Conservation of Nature (IUCN).
- Between 1981 and 2003, there were just around 210 sightings of the fish. The researchers estimate that it became functionally extinct by 1993, and extinct sometime between 2005-2010.
Important Info :
Categories for Extinction:
- The Red List has several categories for extinction, or for how endangered a species is.
- Extinct in the wild means a species survives only in a captive environment.
- Locally Extinct means a species has ceased to exist in a particular area but may exist in other areas.
- Functionally extinct means the species continues to exist but it has too few members to enable to reproduce meaningfully enough to ensure survival.
- Globally extinct means a species has no surviving member anywhere. Such a conclusion is reached when there is no reasonable doubt left that its last member has died.
Source : Indian Express