Cuvier's monsters whale, part of a mass stream in Greece in the Kyparissiakos Gulf in 1996.
Credit: Alexandros Frantzis / Splashdowndirect / Shutterstock
Naval sonar has been almost healthy for nearly two decades, but the specific mechanisms that affect whales are weakening by scientists. Now, the researchers explain the main details of this dense sign that triggers the behavior of some whales that end this death.
Previously, breast-like necropsies with multiple fluctuations found nitrogenous tissue bubbles of the body, decompression sickness or "bends." This dangerous situation also rains diving into deep underwater waters; It can cause pain, paralysis and even death.
The whale is adapted for sea diving, and jokes are whales to make the long and deep dives. New research shows the significance of certain frequencies, such as some bird-birds that are overwhelmingly fearful, the experience overcomes important diving deep-heartedness: heart beating slower. Frightening fear speeds up the heart rate of the whale, it can lead to decompression disease; The intense pain of this situation does not allow the whale, they sink into the beach and eventually die, scientists have recently investigated. [Whale Photos: Giants of the Deep]
Cuvier's massive boarfoot (Ziphius cavirostris) Since the 1960s, there have been no apparents, but this has changed the entry of the active semaphore (MFAS) into the ocean oceans. This type of signal, sub-marine detection developed in the 50s, is between 4.5 and 5.5 kHz, according to the study. When this sonar appeared, the jaws rushed to alternate whales, and according to 121 incidents that occurred between 1960 and 2004, researchers wrote.
Scientists first linked the Cuvier's clay and naval exercises to the end of the 80s, using sonar, the main researcher of Yara Bernaldo de Quirós, the Health and Food Safety Institute, in Las Palmas de Gran Canaria, Spain Live Science by email.
This connection was reinforced in similar events that occurred in 1996 in Bahamas in Greece and in 2000, added Quíros. In September 2002, 14 whaling vessels navigating in the Canary Islands, during a NATO fishing vessel, veterinary pathologists discovered "injuries to animals that are in line with the decompression disease," Quirós said.
Fight or flight
In 2017, biologists analyzed whales whales in their workshop to analyze discoveries about the whirlwinds of the last decades using seawater techniques.
Between 2002 and 2014, Greece, the Canary Islands and the Almeria six massive explosives occurred in the southeast, but bale employers did not appear malnourished or ill. However, "large gas bubbles" show their veins, multiple blood organs, and "myriad severities" with "microscopic hemorrhages" of the body tissues.
Clay bales overcame the cost of adaptation to the "fight or flight response": a fall in the heart rate, which reduces oxygen consumption and prevents the accumulation of nitrogen. The result was bleeding and "massive bubbles in the formation of tissues," explains Quirós.
These symptoms of decompression disease are obliged to recognize whales with sound blasts, according to the study.
"The spatial and spatial association related to naval exercise for Sonar is very clear," said Quíros by email. Also, since behavioral studies have shown that whales that have never been found (or only those who have suffered such cases) show a more solid response than animals outside the military.
In 2004, Spain canceled a sound in the Canary Islands, a massive sound. There has been no massive election since the ban was banned, "said Quíros.
Based on his discoveries, the authors of the investigation proposed a general false spread in military era, through the sound of the Mediterranean Sea, and the masses of the jaws are still not atypical. Further research will determine the long-term impact on massive populations, the authors wrote in the study.
The findings were published online today (January 30), in the Royal Society B. Proceedings magazine.
Originally posted Live Science.