Endangered dolphins are on the verge of extinction, and appropriate measures will have to be taken quickly to conserve their already diminishing population on the rivers, seas and oceans. Apart from the natural dangers, the dolphins face in the seas and oceans; the greatest threat to their existence comes from man. Research has indicated that over 95% of dolphin deaths are caused by man triggered reasons. Some of the endangered dolphins include; the Pink dolphin, Irrawady dolphin, Baiji dolphin, Hector dolphin, Amazon River dolphin, Dusky dolphin, Striped dolphin among other species.
Some dolphin species are facing a high risk of being extinct than others. Most of these species are found in the rivers and estuaries, where they do not have enough space to replenish their populations due to mans destructive activities on the rivers. Pink dolphins, for instance are one of the dolphins that are on the verge of extinction. There are only about 100 Pink dolphin found in rivers in Hong Kong. This has come as a result of over-fishing and serious pollution of Pearl River. The ability of these dolphins to reproduce and replenish their population has been hindered by human activities carried out in the river.
Another species of endangered dolphins is the Irrawaddy dolphins. These dolphins too are also facing extinction as a result of harmful fishing methods such as the use of explosives to kill the dolphins. The explosives used by these fishermen have harmful consequences to the marine life, dolphins included. The explosives blocks the oxygen supply into the water causing the deaths of these dolphins and also affecting their breeding places.
Baiji dolphin is another endangered dolphin species, due to the pollution of their habitat and overfishing. Too much traffic in the rivers has led to many deaths of the dolphins as they get killed by the boat propellers. Dolphins are always agitated by the sounds from the motor boats hence would approach the boats and in the process get knocked down. This can cause many dolphin deaths, when the boat traffic is high in the river. The sounds made by the boats also confuse their echolocation, which they rely on to find food. This makes it hard for them to obtain food hence starve to death.
There are many reasons as to why some dolphins are endangered and are their way to extinction. Man and his destructive activities on the rivers, seas and oceans are the main causes of the diminishing dolphin population, apart from the natural causes. Dolphins have attracted a lot of attention of scientists and even ordinary people. Many dolphins have been captured and removed from their natural habitats for the purposes of research and aquariums facilities. The capture and transportation of captured dolphins causes them to be exposed to diseases which have contributed to their deaths. Dolphins close ties with the humans have also put them in danger. The popular activities, such as swimming with the dolphins have made tourists and the natives to disrupt the feeding and the breeding areas of the dolphins.
Chemical pollution has also posed a great danger to the survival of wild dolphins. Their natural habitat has been contaminated by oil leaks, chemicals and heavy metals pollution. Pollution makes the dolphins to be susceptible to various kinds of illnesses and also increases infant mortality rates. The pollution has a negative impact on their food chains. Dolphins feed on other fish and sea plants that may have been contaminated in different places causing them to bear high risk of pollution.
There are also natural causes that make dolphins be endangered. They have to compete with sharks and whales for food. Global warning has impacted negatively on their habitat causing loss of food sources, making it hard for them to survive. There is a need for laws to be enacted to help protect the dolphins in their natural habitat. Endangered dolphins, if not protected will soon face extinction.