Importance Of Dolphins Protection - Free Essay Example

Eo, Yeo, and Kwon (2013) explain gastrointestinal foreign bodies are a serious problem in cetaceans and dolphins (p. 251). For example, Eo et al. (2013) helped a male bottlenose dolphin to remove foreign objects from its forestomach, and they found that The foreign bodies included a 10— 3.5 cm plastic tube, 4—2.0 cm stainless steel pipe, brush, and concrete debris (p. 251). Consequently, the species of dolphin are significant by man-made marine litters. Hence, marine debris as one of the chemical pollutions poses a real threat to dolphins lives because serious issues such as suffocation, intestinal blockage, and internal injury are caused by ingestion of plastic litters and entanglement by packaging. On the other hand, some individuals challenge that environmental pollutions actually do not have a significantly negative effect on dolphins because of two main reasons. First, lots of scientific studies about how environmental pollutions affect dolphins population are not optimal. For instance, some factors that would impact the results are not being quantified in the study of oil spills (Pitchford et al., 2018, p. 16). Additionally, the statistics are not sufficient because such data are rather difficult to collect. Durante et al. (2016) write that there is solely a low number of samples available (P. 358 ). Follett, Genschel, and Hofmann (2014) say that reliable conclusions cannot be drawn based on inadequate data and limited knowledge although oil discharge leads to huge destruction (p. 130). Scientists have to examine the death of many animals to confirm the cases that animals died due to environmental pollutions (Follett et al., 2014, p. 130). In other words, humans do not know indeed have no adequate information about how animals died is linked to environmental pollution since checking the actual cause of a large number of animals death is quite challenging. Hence, the limitation of some scientific researches and the lack of data are the two reason why some individuals reject that dolphins are significantly harmed by environmental pollutions. Nevertheless, there is compelling evidence showing that environmental pollutions have an adverse impact on food chain and ecosystems. Follett et al. (2014) write that oil spills can grow bacteria and kill smaller animals like shrimps that are the sources of food to dolphins although oil spills may not directly kill dolphin populations (p. 122). It means that oil and chemical spills obviously result in habitat destruction to dolphins and increase the risk that dolphins have diseases. More importantly, Holt et al. (2015) study a pair of bottlenose dolphins at the lab and conclude that the louder dolphins phonate, the more oxygen and energy they need. Then Holt and her colleagues apply the uniform method to calculate how many extra calories wild dolphins have to get to compensating the extra consumption of energy, and they estimate dolphins need to obtain two extra calories for every two minutes (p. 1650). Though this extra metabolic cost is not huge, the consumption of energy will be come quite large through accumulation over time. Meanwhile, not all dolphins enable find sufficient foods, especially for juveniles and pregnant females. Thus, environmental pollutions indeed have an obviously dramatic effect on dolphins populations. To conclude, environmental pollutions significantly harm the species of dolphins because of the three reasons. Chemical pollutions enable toxins and poisons enter dolphins bodies and destroy their reproductive and immune systems. Through injuring dolphins auditory system and disrupting the communication, dolphins health is impaired by noise pollution, and dolphins normal behaviors are changed by noise as well. Marine debris threat dolphins life by raising the risk that dolphins ingest litters or be entangled by plastic bags, which leads to severely consequent problems such as obstruction of the digestive system and asphyxia. Each person, every organization, and all countries ought to should the responsibility to tackle environmental pollution and protect dolphins. Humans should take actions immediately before environmental pollutions result in more seriously irreversible damage to dolphins.