Estimated spawning site for European eels Published by Japan Agency for Marine-Earth Science and Technology, etc. October 18, 6:24
International research teams such as the Japan Agency for Marine-Earth Science and Technology have announced research results that are presumed to be near the submarine mountains of the Atlantic Ocean as a spawning site for European eels, which has long been a mystery, and may be useful for resource management in the future. It is attracting attention as.
European eels inhabiting Europe have been designated as an endangered species by the International Conservation Union and were thought to spawn in the Sargasso Sea in the North Atlantic Ocean, but no eggs or mature eels were found in the survey. The spawning site could not be specified.
Japan Agency for Marine-Earth Science and Technology and French research institutes are looking for similar places in the Atlantic Ocean, noting that the spawning grounds of Japanese eels are around the seafloor mountains in the Pacific Ocean, where water temperature and salt content change rapidly. I did.
Then, I discovered that there is a sea area where the water temperature and salt content change rapidly near the Mid-Atlantic Ridge, a submarine mountain range.
The area is several hundred kilometers east of the Sargasso Sea, and simulations using ocean current data show that the destination of the ocean current from this area coincided with the area where European eels live.
From these facts, it is highly possible that the research team was able to estimate the spawning site of European eels.
Since overseas research teams are considering conducting surveys in this area, it is attracting attention as it may be useful for resource management in the future.
Yasumasa Miyazawa, Deputy Director of the Application Lab, Japan Agency for Marine-Earth Science and Technology, said, "The research on Japanese eels was very useful. I was talking.