Some grounds are closed during the spawning season (eg, for cod); others—nursery areas—are permanently off limits.

有些渔场在产卵季节被封闭（例如，为了鳕鱼产卵）；另一些鱼类孵化的渔场是永久禁入的。

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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%。

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It shows that the main spawning season is in spring and summer.

这表明本海区的鱼类的主要产卵季节是春季和夏季。

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Another surprise was the discovery of drifting eggs as late as September, contrary to previous belief that the spawning season ends in July.

WSJ: Asian carp spawning areas wider than expected

Thames Water had initially looked at draining the lake to make the repair but this was ruled out as the fish are in spawning season.

BBC: Row over Maiden Erlegh Lake sewage leak

In the Winnebago system, the fish were helped by state laws and a period in the 1970s and 1980s when the polluted waters were so murky that they were hard to catch, except during the spawning season.

WSJ: Standing Guard for the Sturgeon