A five-year population study of great white sharks at Gansbaai, South Africa, reveals that the population hasn’t recovered since gaining formal protection in 1981. The authors of this study note that if the great whites are to survive, additional international conservation measures will be required.
Researchers from the Dyer Island Conservation Trust made 1,647 trips on a shark-cage diving vessel obtained 1,683 useable images of the great white sharks’ dorsal fins. The images were used to identify 532 individual sharks.
Using this data and computer models, the researchers found that this particular “super-population” is composed of only 908 individuals. This might seem like a big number, but it is less than half of what the researchers were expecting, which led them to conclude that sharks are not receiving adequate protection for healthy population growth.
Check out the following infographic to learn more:
Research Conducted by Marine Dynamics a Shark Cage Diving Operator in Gansbaai South Africa
For more information:
- Check out this article about the study: It’s a great white shock
- And this one: Fewer than 1,000 Great White sharks remain in South Africa
- Find out why fins were vital in the great white study
- See the full study: Gauging the Threat: The First Population Estimate for White Sharks in South Africa Using Photo Identification and Automated Software
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