• 1. effective population size: 有效群体大小
• 2. genetically effective population size: 遗传有效种群大小
• 3. mean effective population size: 平均有效种群大小

更多释义

• 1.Effective population size and breeders selection manners affect the effect of breeds conservation.
  群体有效大小和留种方式影响保种的效果。
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• 2.That number is smaller than current figures for the effective population size (or number of breeding individuals) for endangered species such as chimpanzees (21, 000) and gorillas (25, 000).
  当时的人数甚至不及现在濒临灭绝的黑猩猩（21000头）和大猩猩（25000头）的有效种群大小（即能生育的个体数量）。
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• 3.Some technical measures were used in the breed control of Hequ horse, such matters as defining conservation region, determining effective population size and having a right foundation herd etc.
  河曲马品种的保种与选育，应采取划定保护区，建立育种核心群，确定群体有效含量，控制近交，调整马群结构和合适的公母比例等措施；
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