• [pic]"Save the Whales" Crafts
• [pic]What Are the Causes of Endangered Whales?
o In the 1900s, whales meant huge profits to deep sea fishermen. From one whale, 120 barrels of oil could be produced. Fishermen improved the numbers of catches by perfecting whale catching techniques and they used harpoons for spearing the giant beast. Their population was cut down to 1 percent of its original size. The thick layer of blubber on a blue whale is to keep it warm, but humans have found multiple other uses for the tissue. It is used for the production of fuel, oil, soap and candles. Their baleen was used to make brushes and corsets rather than filter krill for the animal's food. Hunting has been the biggest downfall of the population of this species due to the financial gains humans can make from their bodies. It is no longer considered a problem due to the ongoing efforts of worldwide conservation efforts. Noise Pollution
o Rather than sight, blue whales use echolocation to determine their location and direction. This ultrasonic noise helps guide them along and avoid objects and swimming in shallow waters. When the navy tests equipment underwater, the sound and vibration can create interference that confuses the whale, sometimes causing them to beach themselves or get hit by ships. Being struck by ships is now the biggest threat to the blue whale population. In 2007, three blue whale fatalities were confirmed to be caused by collisions with ships. The problem has gotten so serious that the National Oceanic and Atmospheric Association (NOAA) is attempting to lower boat speed limits and consolidate shipping routes to reduce a ship's chance of encountering a whale. o Sponsored Links
▪ Monterey Area Whale Watch
Gray Whales, Dolphins and Orcas Adults $30/Child $15 (831) 917-1042 www.sanctuarycruises.com
Environmental Pollution and Degradation
o Chemicals such as pesticides and oil are a serious problem for blue whales. These toxins collect in the fat stores of adult whales and contaminate a nursing cow's milk. Environmental pollution leading to an increase of ocean water temperature has several negative effects on the well-being of blue whales. The warmer water harbors the growth of viruses, parasites, and toxic algae, and it also...