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为什么调查蓝鲸的种群密度仍然要用标志重捕法 知乎 Template






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种群密度是种群的最基本的数量特征，出生率与死亡率、迁入与迁出，直接影响种群密度；年龄组成预示着种群未来的展趋势。√——青夏教育精英家教—— sketch template
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题目利用标志重捕法调查某种动物的种群密度时下列哪项因素一定会导致调查结果小于实际值 A误将部分未标记个体统计为标记个体B两次捕获 sketch template
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下列有关调查种群密度的说法错误的是 A．五点取样和等距离取样是样方法取样的常用方式遵循了随机取样的原则 B．调查古木蝗虫的幼虫某 sketch template
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用标志重捕法来估计某个种群的个体数量例如在对某种鼠群的种群密度的调查中第一次捕获并标志39只第二次捕获34只其中有标志鼠15只则对该 sketch template
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“标志记重捕法 是动物种群密度调查中的一种常用取样调查法在被调查种群的生存环境中捕获一部分个体M全部进行标记后释放经过一段时间后 sketch template
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调查动物种群密度的正确方法是 A．草地中跳蝻的种群密度可以采用样方法进行调查B．对于活动能力强活动范围大的动物最好采用样方法调查种群 sketch template
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2．种群的特征 其中 对于预测种群数量的变化趋势具有重要的意义——青夏教育精英家教—— sketch template
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题目那边有关调查种群密度的说法错误的是A．五点取样法和等距取样法是样方法取样的常用方法B．调查作物植株上蚜虫的密度跳蝻的密度采用标志重 sketch template
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下列有关调查种群密度的说法错误的是A．五点取样和等距离取样是样方法取样的常用方式遵循了随机取样的原则B．调查古木蝗虫的幼虫某种蛇的种群 sketch template
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7．BC 动物种群密度的取样调查法一般采用标志重捕法而且种群密度反映的也是一定时间内单位空间内某种群的个体数量随着时间的推移同一物种的 sketch template
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利用标志重捕法调查某种动物的种群密度时下列哪项因素一定会导致调查结果小于实际值 A．已标记个体的标志物脱落B．重捕时误将部分未标记个体 sketch template
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图1为某温带稀草原食物的一部分示意图图2为某生物的种群密度与出生率死亡率的关系图请据图回答1在狼与兔的捕食与被捕食过程中反应 sketch template