Ultimately, scholars 'worst fears came to pass: After a series of summer typhoons, many of the salmon on whom the hopes of extending the species rested had disappeared. Add to this that there were few suitable spawning grounds and other reasons, and the number of brook masu salmon fell to 500-600, the level at which they remain today.
夏天連續幾個颱風一來，許多擔負延續族群使命的魚群，不知去向；加上缺乏產卵場等原因，逐漸的魚數減至五、六百條，原地踏步至今。