Dolphins die in the Black Sea, it may be related to the war in Ukraine – Earth – Science and technology

The war in Ukraine may be linked to the recent increase in dolphin deaths in the Black Sea.

Scientists from the Turkish Marine Research Foundation (TUDAV) reported on Tuesday.

Since the beginning of the Russian invasion of Ukraine, Turkey has seen a decline in dolphins off the Black Sea coast. The scientists believe that the cause is pollution in its northern waters, which they attribute to the increased military activity and the presence of 20 Russian warships in the area. This forces dolphins to move to the coasts of Bulgaria and Turkey, where they become entangled or caught in fishing nets.

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TUDAV has discovered more than 80 dead dolphins, half of whom have lost their lives in fishing nets. The other animals showed no signs of entanglement or gunshot wounds. Researchers therefore estimate that the cause of death may be so-called acoustic trauma.

“We know nothing about what causes the use of low-frequency sonar in the Black Sea, because we have no experience with so many ships and the associated noise,” said TUDAV chief Bayram Öztürk.

Naval forces commonly use sonar to be able to identify enemy submarines from a great distance. Because many marine mammals also use sound waves to communicate, excessive submarine noise can have fatal consequences for them. Although such noise may not kill the animals immediately, it may force them to migrate into unknown waters, which could explain the massive dolphin exodus to the south.

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A similar situation is reported by Bulgaria, which has seen an increased incidence of blunt-nosed porpoise, a dolphin-like marine mammal, in its coastal waters.

According to scientists, the investigation of the causes of animal death is hindered by the fact that there are no regulations governing the protection of marine animals during the war. They are also unable to monitor which species are endangered as a result of the conflict. However, they assume that in addition to pigs and dolphins, it could also be a migratory bird that commonly inhabits wetlands in the northern Black Sea.


Source: Pravda – Veda a technika by vat.pravda.sk.

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