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300 whale calves dead: Scientists seek answers
31 Oct
Summary
- Over 300 whale calves died since June, nearly triple the 2012 record.
- A bacterial infection, Erysipelothrix rhusiopathiae, is suspected as the cause.
- Environmental changes and gull injuries are being investigated as contributing factors.
The sheltered waters of Argentina's Patagonian coastline, a vital nursery for southern right whales, are facing an unprecedented wildlife crisis. Since June, more than 300 whale calves have died, a stark increase compared to the 113 deaths recorded in 2012. This alarming mortality rate has prompted urgent scientific investigation into its causes.
Preliminary research indicates a bacterial infection, specifically Erysipelothrix rhusiopathiae, is a likely culprit. This bacterium was previously identified in the region but has not been associated with such a high number of fatalities before. Scientists are examining potential links to environmental changes in marine conditions, such as water temperature and pH shifts, and considering how injuries from kelp gulls might facilitate bacterial entry and transmission.
Southern right whales, once near extinction, have seen population recovery due to conservation efforts. However, they continue to face various threats. While this season's high calf mortality is concerning, experts caution that its long-term impact on the overall population remains to be seen, as these whales are long-lived.
