Ocean sounds muffled by human acoustic pollution



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Ocean sounds muffled by human acoustic pollution

Sona, ships, hips, fishing, offshore platforms: everything that involves the action of man in the oceans is transforming marine life into a system of noises that upset the ocean spunds. Today, however, the Noise pollution created by humans is changing the sound dynamics of the oceans.

Anthropogenic noise is changing life in the oceans was recently told in a study published in Science by a team of 25 international scientists, experts in marine biology and acoustics, who are alerting us to the possible and damaging effects of noise pollution.

oceanic. Sound can travel several miles and help animals move in different conditions and depths of the ocean. The same marine species have adapted to detect sound waves and move through sounds, for example dolphins, whales and other large cetaceans communicate by singing.

From whales that divert their paths, for example around oil platforms, to sperm whales influenced by the sonar of military ships, to the modification of sounds in coral reefs. The analysis even highlights how underwater noise can affect zooplankton, the basis of the diet of many animals, or jellyfish.

Clownfish after the larval state and the first stages of growth, usually orientates itself thanks to the noises of the coral reef, sounds and pops that allow it to always find its way back inside the coral forest.

Pacific whales are starving due to global warming

Between 2019 and 2020 378 were found dead along the Pacific coasts of Mexico, the United States and Canada.

The gray whale suffers the consequences of climate change. The only surviving species of the Eschrichtiidae family, these are huge cetaceans that undertake annual migrations between the feeding areas in the Bering, Chukchi and Arctic seas and the typical breeding areas.

Researchers had noticed a reduction in the body conditions of young and adult gray whales: a decline found, unfortunately, also in 2019 and which also coincided with the reduction in sightings of mother and whale pairs and, therefore , with the reduction in the reproduction rate of whales.

The researchers fielded a coordinated study between the two universities with the use of drones and various photogrammetry techniques and between 2017 and 2019 they measured the body condition of gray whales in the San Ignacio lagoon, in Mexico through surveys of the length and width of the body During the summer feeding season between May and October, they accumulate important concentrations of fat, the energy reserves necessary for migration, reproduction and their very survival.

It is clear, once again, how important it is to take action to stop climate change. At this point you may be wondering why whales would be starving. The most accredited answer, according to scientists, lies in climate change.

Since the end of the 1980s, there has been a reduction in the biomass of amphipods, which are the main source of food for gray whales.