There has been a sharp rise in whales stranding in recent years, and this problem has been of great concern to all. Sometimes whales swim into shallow water and end up stranding themselves on beaches in many parts of the world. For example, Scientific American reported that fifty-five false killer whales that washed up on a beach in South Africa in 2009. Why do whales beach themselves? Did they feel so sad? This essay will discuss how this problem has emerged.
Scientists and marine biologist believed that Navy Sonar is responsible for whale stranding.(Melina). Whales use echolocation to navigate and find food in the dark because their vision is undeveloped. Military sonar always sends very loud sounds under the water and it’s power can remain far away, so whales’ navigation system might be disrupted which cause them to get lost. In particular, whales can send out sound waves (ultrasonic) from their mouth or nose. When the ultrasonic hit an object they produce echoes. Whales can use reflected waves to locate distant objects and sense their shape and movement. However, since …show more content…
In recent years, since the rapid development of human industry and increase in population, people need more products to sustain their life. However, many companies refuse to spend money on managing pollution, especially in those countries which paid no attention to environmental protection. Therefore, a large amount of sewage is poured directly into oceans , so the balance of Marine ecosystems will be broken. For instance, poisonous "red tides" in the sea may affects whales’ health. Red tide is a kind of toxic algae that can kill many small fish and salmons in a few minutes. The death of these marine animals may influence the structure of ecosystems in the ocean. If toxin accumulates in the food web, whales will get sick. In other words, human behavior is the main cause of whales
Scientists and marine biologist believed that Navy Sonar is responsible for whale stranding.(Melina). Whales use echolocation to navigate and find food in the dark because their vision is undeveloped. Military sonar always sends very loud sounds under the water and it’s power can remain far away, so whales’ navigation system might be disrupted which cause them to get lost. In particular, whales can send out sound waves (ultrasonic) from their mouth or nose. When the ultrasonic hit an object they produce echoes. Whales can use reflected waves to locate distant objects and sense their shape and movement. However, since …show more content…
In recent years, since the rapid development of human industry and increase in population, people need more products to sustain their life. However, many companies refuse to spend money on managing pollution, especially in those countries which paid no attention to environmental protection. Therefore, a large amount of sewage is poured directly into oceans , so the balance of Marine ecosystems will be broken. For instance, poisonous "red tides" in the sea may affects whales’ health. Red tide is a kind of toxic algae that can kill many small fish and salmons in a few minutes. The death of these marine animals may influence the structure of ecosystems in the ocean. If toxin accumulates in the food web, whales will get sick. In other words, human behavior is the main cause of whales