Been demonstrated that cultured bluefin tuna can survive in nature.

13, he announced in October released into the sea completely cultured bluefin tuna fry was born and raised in cages, and were captured after 45 days at the longest (Shirahama, Wakayama Prefecture) Fisheries Laboratory of Kinki University. I am the world's first attempt, farmed bluefin tuna catch for food on their own in the natural world, and the university was able to prove that you can survive.
October 15 and 21, off the coast of Wakayama Prefecture Kushimoto, International Institute of Aquatic Resources, Fisheries Research Kinki and was discharged the tail of March 1862 bluefin tuna farming mo of 16-28 cm in length. Signs of wear mark on the dorsal fin, the belly of the tail 11 of whom were wearing a device that records temperature and depth, and movement path.
Before December 5 from discharge, eight tail was captured off the coast of Shizuoka Prefecture, Wakayama Prefecture. Bluefin tuna prospect starve to death and not take the bait on their own 30. Tail two of the tail 8 is captured after 45 days and after 35 days, respectively, from discharge, it will bluefin tuna raised in mixed feed will catch the bait on their own, surviving in the ocean of nature.

It may be a good way of returning to the sea farmed in cages from the meaning and protection of the species and we will establish.



近畿大学水産研究所（和歌山県白浜町）は13日、いけすで生まれ育った完全養殖のクロマグロの稚魚を10月に海に放流し、最長で45日後に捕獲したと発表した。世界初の試みで、同大は養殖クロマグロが自然界で自力で餌を捕まえ、生存できることが証明できたとしている。
　近畿大と水産総合研究センター国際水産資源研究所は10月15日と21日、和歌山県串本町沖で、体長16～28センチの生後3カ月の養殖クロマグロ1862尾を放流した。背びれに目印の標識を着け、うち11尾の腹には水温や水深、移動経路などを記録する装置を着けた。
　放流から12月5日までに、和歌山県から静岡県の沿岸で8尾が捕獲された。クロマグロが自力で餌を捕らないと餓死するめどは30日。8尾のうち2尾は放流からそれぞれ35日後と45日後に捕獲されており、配合飼料で育ったクロマグロが自力で餌を捕まえ、自然の海で生き残ったことになる。
　種の保護といった意味合いからもいけすで養殖し海に戻すという方法が確立していくといいのかもしれませんね。