A Giant fish is declared extinct
Posted on : 18 Feb 2020Views: 230
- 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 (Psephurusgladius) 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.
- Chinese researchers made this conclusion based on the Red List criteria of the International Union for Conservation of Nature (IUCN).
- Declaring a species extinct is an elaborate process. It involves a series of exhaustive surveys, which need to be taken at appropriate times, throughout the species’ historic range and over a time-frame that is appropriate to the species’ life cycle and form.
- Once declared extinct, a species is not eligible for protective measures and conservation funding; therefore, the declaration has significant consequences.
- In the case of the Chinese paddlefish, the researchers made the conclusion over long-term surveys. It was once common in the Yangtze, before overfishing and habitat fragmentation — including dam building — caused its population to dwindle from the 1970s onwards.
- 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
Article Related Questions
“Chinese paddlefish” was recently in news; consider the following statements regarding it
1.It has been declared extinct recently
2.Its ancestral home was the Yangtze River.
Which of the following statement is/are correct?
3.Both 1 and 2
4.Neither 1 nor 2
Right Ans : Both 1 and 2