... 繁殖期 breeding season; breeding time 育种族群大小;繁殖个体数 breeding size 种畜 breeding stock ...
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effective breeding size 有效育种量
Lack, however, suggested that clutch size—the number of eggs a bird lays per breeding cycle—is far below the potential limit of egg production.
然而,缺乏情况表明卵的大小——每一个繁殖周期下的蛋的数量——远低于产蛋的潜在限制。
One particular transposon first appeared about a million years ago. And by seeing where these sequences now sit, scientists can get a sense of the size of the breeding population back then.
位置固定的转位子第一次出现是在一百万年前,通过观察现在这些序列的排列顺序,科学家们就可以了解到那个时代的人口数量。
Larviciding measures at mosquito breeding sites are the most effective form of vector control if breeding sites can be clearly identified and are limited in size and extent.
如果蚊子滋生地点可以明确确定并且范围和程度有限,就地采取杀幼虫措施就是十分有效的媒介控制形式。
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