The dominant predacity enemies are chilomenes quadriplaglata fswartz ) , stethorus spp . , chrysopa sinica tjeder and the spider . the ooencyrtus sp 捕食性天敌优势种为四斑月瓢虫、食螨瓢虫、中华草蛉及蜘蛛。
The raphidioptera and neuroptera are one of the most archaic groups of endopterygote neoptera . many of them have been presumed to be predators 蛇蛉目和脉翅目是一类原始的内生翅昆虫，它们绝大部分均是捕食性种类。
Pregnant women , women of child - bearing age , infants and children are advised not to consume excessive amount of predatory fish such as shark and swordfish 孕妇介乎生育年的女士婴儿及小孩应避免过量进食捕食性鱼类，如鲨鱼及剑鱼。
At present , the mainly studying of foraging behavioural ecology is about ladybird and lacewing , and less about aphidophagous hoverfly 目前，对捕食性昆虫捕食行为生态学的研究主要集中在瓢虫和草蛉，而有关捕食性食蚜蝇捕食行为生态学的报道几乎没有。
Marine ecosystem structure has also been changed and the fishery has shifted from catching large predatory fishes to small trash fishes and invertebrates , which are resistant to heavy fishing cheung 2001 另一方面，海洋生态系统结构亦已改变，渔获亦从大型的捕食性鱼类，转变为那些较能抵抗密集捕鱼体型细小无经济效益的杂鱼类及无脊椎生物cheung 2001
Recently , because of concern about the effects of insecticide on the environment , in - creased attention 15 being given to the use of biological agents for controlling the vectors of human disease 摘要由于化学杀虫剂可能引起之副作用，包括捕食性及寄生性天敌、费洛蒙、昆虫生长调节剂等，生物防治法浙受重视；至目前止，其中较有实用价值者，当推鱼类及细菌。
Natural enemies of hyphantria cunea ( drury ) were investigated in qinhuangdao , hebei province . two parasitoids in larva stage , 12 parasitoids in pupal stage and 2 predators ( coccinella septempunctata and tenodera sinensis ) were found 摘要通过对美国白蛾各个发育期的天敌进行调查与研究，发现除了捕食性天敌七星瓢虫、大刀螳螂等外，幼虫期有2种寄生性天敌、蛹期有12种寄生性天敌，这为保护和利用天敌、有效控制美国白蛾提供了依据。
In the whole insect community , the pests that have been defined include 63 species , which hold the 17 . 07 % of whole community . the natural enemies ( including predacity and parasitical enemy ) include 79 species , which hold the 21 . 41 % of the whole community 在整个昆虫群落中，己明确为害虫的有63种，占整个群落的17 . 07 ；天敌(包括捕食性天敌与寄生性天敌) 79种，占整个群落的21 . 41 ；中性昆虫227种，占整个群落的61 . 52 。
Based on a systematic investigation on the predatory natural enemy community in cotton fields to the north of the huaihe river of anhui province , the methods of polar ordination ( po ) and fuzzy cluster analysis ( fca ) were employed to study the dynamic classification of predatory natural enemy community in cotton fields and the method of principal component analysis ( pca ) was employed to study the major stages of change of predatory enemy community in cotton fields during the process of cotton growth and development 摘要在对安徽省淮北棉田捕食性天敌群落进行系统调查的基础上，采用极点排序和模糊聚类分析方法，研究了棉田捕食性天敌群落的动态分类；采用主成分分析方法，研究了棉田捕食性天敌群落在棉花生长发育过程中演变的主要阶段。
Both oxyopes sertatus and harpactor fuscipes are important predators of common cutworm ( spodoptera litura ) on tobacco . the effect of several interference factors on the predations of o . sertatus and h . fuscipes on the larvae of s . litura were examined in laboratory . the results indicated that there were significant mutual interferences on their predations with the existence of other individual in the same / different species . as the number of the predator increased , the predation rates decreased significantly . the interference coefficients ( m ) within h . fuscipes and within o . sertatus were 0 . 7278 and 0 . 6911 , respectively , while the interference coefficient ( m ) between o . sertatus and h . fuscipes was 0 . 9464 . these results showed that the effect of mutual interference on predation in interspecies was more obvious than that in intraspecies . the number of prey captured and the predation rate of predator dropped with increasing the number of tobacco stalks . this result suggested that spatial heterogeneity was also an important factor affecting the predation of predator on prey 斜纹猫蛛和红彩真猎蝽均是烟草上斜纹夜蛾的重要捕食性天敌.室内测定几种干扰因素对斜纹猫蛛和红彩真猎蝽捕食作用的影响,结果表明这些干扰因素对斜纹猫蛛种内、红彩真猎蝽种内和两种捕食者种间的捕食作用均有明显的干扰作用,随捕食者数量的增加,其对斜纹夜蛾捕食作用率显著降低.斜纹猫蛛种内的干扰系数和红彩真猎蝽种内的干扰系数分别为0 . 7278和0 . 6911 ,而两者种间的干扰系数为0 . 9464 ,说明两者种间的干扰作用要明显高于同一种捕食者种内的干扰作用.两种捕食性天敌对斜纹夜蛾的捕食量和捕食作用率随烟草茎杆数的增加而降低,表明空间异质性同样是影响两种捕食性天敌捕食作用的一个重要因素
