European lobster, one of the most expensive seafood in the world, makes a loud noise to communicate with each other or chase predators.
The lobster rubs the stubble against each other to make a loud noise. (Photo: Pinterest).
The team led by Dr. Youenn Jézéquel of the European Marine Research Institute recorded more than 1,500 noises created by 24 lobsters (Palinurus elephas) in Saint Anne du Portzic Bay, France. They used a set of underwater headphones, set at a distance of 0.5 to 100 m from the lobster.
According to research published on May 21 in Scientific Reports, the sound created by the smallest group of lobsters can only be recorded at distances of 50 m or less. However, the larger shrimp in the study produced sounds that could be obtained from a distance of 100 m. By examining the sound intensity by distance and looking at the high noise level in the bay's water environment, the scientists estimated the sound produced by European lobster by rubbing the beard root against each other could resonate. further away, reach a distance of more than 3 km with 13 cm long individuals.
European lobster is one of the most expensive seafood in the world with 44 - 132 USD per kilogram. However, decades of overfishing have contributed to a significant reduction in the number of species since the 1970s. Lobsters are listed as vulnerable in the International Union for Conservation of Nature's Red List. They live off the coast of England, Ireland and the Mediterranean, at a depth of about 198 m.
The results of the study have many important implications for conservation efforts. Using non-invasive techniques such as using underwater sound can play an essential role in monitoring and surveying coastal lobster.