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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.

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Whales in the News

Dolphins and Whales News -- ScienceDaily

Shhhh, the whales are resting - Researchers recommend new guidelines for noise levels from whale-watching boats after having carried out experiments with humpback whales. They exposed the whales to different levels of boat-engine noises while observing the current guidelines for whale-watching -- keeping 100 meters distance, for instance -- while monitoring the whales' behavior closely with a drone camera. The researchers concluded that the noise level from a boat's engine should stay below 150 decibels.
Good night? Satellite data uncovers dolphins on the move at nighttime - More than 1,000 bottlenose dolphins live in Florida's Indian River Lagoon year-round. Although extensively studied, what they do at nighttime is still a mystery. Using satellite telemetry, scientists provide the first documentation that these dolphins have a larger range that encompasses more habitats than previously thought. They regularly leave the brackish waters of the estuarine system and, not only travel into the ocean, but swim substantial distances -- up to 20 kilometers -- up freshwater rivers, creeks, and canals.
New Zealand blue whale distribution patterns tied to ocean conditions, prey availability - The researchers who recently discovered a population of blue whales in New Zealand are learning more about the links between the whales, their prey and ocean conditions that are changing as the planet warms.