Su Wei-cheng, director of the Kaohsiung branch of the TFRI, has estimated a "grey mullet continuous growth volume" based on the rate of maturation of the mullet, its annual catch, and so on.
水試所高雄分所所長蘇偉成曾根據烏魚的生長速度、歷年漁獲量等，推估一個大致的「烏魚持續生長量」，凡超過一百四十萬尾，都算過度捕撈。