So could the disappearance of chinook salmon from the waters off California and Oregon last year; the population during the spawning season was 88% below its all-time high in 2003.

• 去年加利福尼亚和俄勒冈海域的大鳞大马哈鱼的绝迹也是如此，在产卵季节鱼群数量比2003年的峰值低88%25。