الطبيعة والحياة البرية

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duration: 2 Hour and 20 Minute

Great White Sharks' Diet Surprises Scientists

00:01:40

Scientists have discovered that young white sharks spend more time feeding close to the seabed than expected. This means the stereotype of a shark’s fin sticking out of the water as it hunts for food is inaccurate. The evidence of this study matches data collected from another study done on tagged white sharks. The tagging of the white sharks revealed they spend a lot of time many meters below the surface. Researchers from the University of Sydney examined the stomach contents of 40 young white sharks. They also compared it to data from elsewhere in the world to get more accurate results. They found that 32% of the white shark's diet is from mid-water swimming ocean fish like salmon. 17% is from bottom-dwelling fish like stargazers and nearly 15% is from stingrays including the bottom-dwelling variety. Understanding the nutritional goals of sharks gives insight into what causes conflict between humans and sharks. The hunting of bigger prey, including other sharks and marine mammals such as dolphin, is not likely to happen until the sharks reach about 2.2 meters in length, Richard Grainger, Lead Author of the Study.

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