An alternative explanation is defense from predation.
另一种解释是防御捕食。
Once rid of predation pressure, large body size is of little advantage to herbivores.
一旦摆脱了捕食压力，大体型对食草动物来说几乎没有优势。
Once free from predation pressure, large body size is of little advantage to herbivores.
一旦摆脱了捕食的压力，巨大的体型对食草动物没有什么好处。
Together with predation, it is the most important density-dependent factor in regulating population growth.
在调节种群增长方面，它与捕食一起是最重要的密度制约因子。
Of the two plausible explanations for the decline—increased predation by killer whales or disease—disease is the more likely.
对于鲸鱼数量的下降，有两种可能的解释——虎鲸捕食或疾病的增加——疾病的可能性更大。
It is difficult to understand how reduced predation would lead to sudden increases in Acanthaster numbers in several places at the same time in specific years.
很难理解捕食减少是如何导致在特定年份的同一时间内，几个地方的棘冠海星数量突然增加。
In particular, lobster larvae take less time to reach the size at which they are no longer vulnerable to predation by young cod, the chief threat to their survival.
特别是，龙虾幼虫需要更短的时间才能长到不再容易受到幼鳕鱼捕食的大小，幼鳕鱼是它们生存的主要威胁。
Establishing that a firm is guilty of predation is difficult.
裁定一家公司犯有掠夺之罪是困难的。
Predation relations link these agents to form the food chain.
这些动植物主体通过捕食关系构成食物链。
The three main motives for stalking are love, hate and predation.
缠扰行为的三个主要动机是爱、恨和捕猎心态。
Predation is even trickier to uncover when goods are sold together.
当商品一起销售时，掠夺行为将会更难发现。
Predation is one of the most difficult ecological interactions to study.
捕食行为是生态学相互作用研究中最困难的问题之一。
DNA marker technology could be an effective method for the identification of predation.
DNA标记技术是探索捕食行为的有效方法之一。
He also engages other nations cooperatively as opposed to Washington's global predation.
他还从事其他国家的合作，而不是华盛顿的全球捕食。
And Socrates' answer is, of course, the predation of poetry and the arts in Books II and III.
苏格拉底的回答是，当然，见第，II，与，III，册中，对诗学与艺术的描述。
Predation can affect the behavior, group structure, body size and other characteristics of a species.
捕食能够影响一个物种的行为、组织结构、体型大小和其他特征。
The importance of predation as an exploitation strategy may be summarized under four main categories.
捕食作用作为一种掠夺性的对策其重要意义可归纳为四个主要方面。
The importance of predation as an exploitation strategy may be summarized under four main categories.
作用作为一种掠夺性的对策其重要意义可归纳为四个主要方面。
The importance of predation as an exploitation strategy may be summarized under four main categories .
捕食作用作为一种掠夺性的对策其重要意义可归纳为四个主要方面。
The greatest predation was the deforestation of Haiti, so that only 2 percent of the country is forested today.
最严重的掠夺行为是采伐森林，导致如今海地的森林覆盖率只有2%。
Thanasimus dubius larvae preyed all young stages of the beetle inside logs, recorded predation rate of 8.3%.
疑山郭公虫幼虫可以捕食木段内纵坑切梢小蠹幼期各虫态，捕食率为8.3%。
Thus, in addition to the old and infirm by Wolf predation, other deer body growing, number is rapidly growing.
这样一来，除了那些老弱病残者被狼捕食外，其它鹿的体质日益增强，数量也迅速地增长着。
Well, ongoing investigations have revealed that predation is the most likely cause of sea otter decline after all.
目前的研究表明天敌捕食是最可能导致海獭数量减少的原因。
There are as well as density-dependent biological factors such as disease, predation, and intraspecific competition .
还有密度制约的生物因素，诸如病害、捕食和种内竞争等。
And third, the uneven pattern of otter decline is better explained by the orca predation theory than by the pollution theory.
第三，海獭数量变化的不均衡性恰好表明了逆戟鲸捕食理论比污染理论更合理。
The seabirds there have no defences against predation, so the mouse simply walks into their nests and starts eating the chicks alive.
那儿的海鸟对动物的掠食行为毫无防备，所以老鼠们轻而易举地就走进了海鸟的巢穴并开始进食它们的幼崽。
Though the panda is often assumed to be docile, it has been known to attack humans, presumably out of irritation rather than predation.
尽管大熊猫通常被人们认为性格温顺，但据说也攻击人类，不是为捕食而是被激怒了。
"Addiction" provides only a pallid and imprecise analogy for the human relationship to war; parasitism — or even predation — is more to the point.
如果用来比喻人类与战争的关系，“上瘾”显得那么的苍白无力，也有失准确，“寄生”要更加切中要害一些，甚至说成“掠夺”也不为过。
The effects of predation risk in small mammals are mainly include: changes of behavior, activation of the neural circuit and variation of the endocrine.
捕食风险对小型哺乳动物的影响主要包括行为的改变、神经环路的激活和内分泌的变化。
The effects of predation risk in small mammals are mainly include: changes of behavior, activation of the neural circuit and variation of the endocrine.
捕食风险对小型哺乳动物的影响主要包括行为的改变、神经环路的激活和内分泌的变化。
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