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Whales

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Whales

Whales face many threats to their welfare, health, and their existence. The main cause is commercial hunting and pollution. Chemicals and pesticides can poison their internal systems, while discarded rubbish like nets, plastics or fishing lines can strangle the animals to death. Whales are, just like dolphins, highly acoustic mammals. Noise caused by coastal developments and industrial activities can disrupt whales. Tourism also effects whales. They can feel very harassed, especially when they are breeding and calving.
whales
When chemicals pollute the oceans, the food of whales also gets polluted. Female whales then pass these pollutants directly on to their young through their milk, which can result in death or disability. These pollutants also cause the lowering of the whale's resistance to disease. This means they are more likely to die from diseases.

Commercial as well as scientific whaling by countries as Japan and others remains a huge threat to the survival of certain whale species.

More about:

Entrapment in fishing nets and marine pollution are threats various dolphins have to deal with.
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Whales in the News

Dolphins and Whales News -- ScienceDaily

15-foot-long skeleton of extinct dolphin suggests parallel evolution among whales - A report offers a detailed description of the first nearly complete skeleton of an extinct large dolphin, discovered in what is now South Carolina. The 15-foot-long dolphin (Ankylorhiza tiedemani comb. n.) lived during the Oligocene -- about 25 million years ago -- and was previously known only from a partial rostrum (snout) fossil.
How to bring conservation messaging into wildlife-based tourism - A new study suggests that wildlife-based tourism operators should be key partners in educating and inspiring tourists to take informed conservation action. The study introduces a toolbox of ideas for improving wildlife-based tourism operations.
Dolphins learn foraging skills from peers - Dolphins can learn new skills from their fellow dolphins. New findings show that dolphins are not only capable of learning new ways to catch prey, but they are also motivated to learn from peers, not just from their mothers, the researchers say.