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Endangered Dolphins: Threats and Conservation Efforts

Explore the endangered baiji dolphin species in the Yangtze River, Ganges River dolphins, sea dolphins, killer whales, and blue whales. Learn about the dangers they face from pollution, hunting, and habitat destruction, and discover conservation efforts being made to save them from extinction.

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Endangered Dolphins: Threats and Conservation Efforts

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  1. In the water Chapter 5 Animals in Danger

  2. River Dolphins

  3. baiji dolphin species • lives in the Yangtze (Chang Jiang) River in China • 1950´s = 6,000 baijis • they hear very well and talk to other dolphins • in past they heard small ships and swam under

  4. Dangers to the baiji • big ships on the river and other noisesare a danger • baiji´s hit head on big ships • towns and factories pollute the river making the water dirty and hard for the baiji to see • the construction of the Three Gorges Dam changed the habitat

  5. Trying to help the baiji • in 1983 the Chinese stopped hunting river dolphins • built a special habitat in the river • it was expensive to build the habitat so to earn money the govermnet sold the “baiji” name. Results= baiji drink, baiji hotel, baiji shoes • only some of the money helped the dolphins

  6. Did it help? • 1990 = 200 baiji found in 2,000 kilometres of the Yangtze River • 2004=2 found in the river by scientists • Succesful????? I think NO!!!!

  7. River dolphins in the Ganges Riverin India and Bangladesh

  8. Why are the river dolphins in the Ganges River in danger? • 10% of the world´s population live near this river so it is very polluted • dolphins can´t move up and down the river because of dams • now= 4,000 river dolphins remain in the Ganges River BUT THEY ARE IN DANGER OF EXTINCTION!!!!!

  9. Sea Dolphins

  10. Sea Dolphins • live in nearly every sea of the world • people eat their meat • hundreds of thousands die because they are caught in fishing nets • fishing takes away the sea dolphins food

  11. Killer Whales (speciesi n dolphin family) • live 50-80 years in sea but only 10 years in a zoo • they like cold water • their ONLY danger is humans!! • pollution goes to sea and kills the whales and whales eat polluted fish and get ill (sick) • hunting is a danger >> The Inuit of Alaska hunted killer whales in the past but only a small number • after, hunters from other countries with big ships came to hunt the killer whales

  12. Blue Whales of Antartica

  13. Blue whales • Biggest whale in the world • Live 90 years • 1900 = 250,000 • 1930-1931 hunters killed 30,000 • Today = 5,000 DANGER OF EXTINCTION

  14. OTHER SPECIES OF WHALES -other species of whales are disappearing -most countries stopped killing whales but some still do -it is hard to protect the whale far out in the big, big sea

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