在相同温度下，产卵雌虫的发育时间比非产卵雌虫的长。
The development time of ovigerous females was longer than that of non-ovigerous females at same temperature.
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%。
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.
当鲱鱼前往产卵地时，这种20厘米长的鱼会很快聚集，并形成一个规模堪比曼哈顿区的鱼群。
As they headed for their spawning grounds, the 20m fish quickly came together in a school the size of Manhattan.
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