Breeding Tuna through Mackerel – サバがマグロを産む

In NHK’s program “Life Dramatic”was reported a successful experiment of surrogate birth across fish. A university study team transplanted trout’s spermatogonia to baby fish of yamame, and proved that the trout was born from them. Furthermore, the spermatogonia when transplanted to female yamame converted themselves to ova. This whole study is indeed an amazing discovery. The real goal of the study is to have mackerel breed tuna, an endangered species to extinct, and some outcome will be expected in a year. The commentator said it was the responsibility of Japanese that kept consuming tuna the most in the world.


NHKの「いのちドラマチック」という番組で、魚の代理出産の成功例を紹介していた。ヤマメの稚魚にニジマスの精原細胞を移植すると、ヤマメからニジマスが生まれることが実証され、しかも雌の稚魚に移植した精原細胞は卵細胞に自然転換したのだそうだ。これはちょっと画期的な発見だと思う。研究の最終目標はサバにマグロを産ませることで、絶滅の危機に瀕する本マグロの種を救うこと。これはマグロを一番食べ続けてきた日本人の義務だとコメンテーターは言っていた。