The start reading framae and stop codons , base composition in protein - coding genes and the codon usage of amino acids in scolopendra multilane were compared with the three other myriapods 本研究在蛋白质编码基因起始阅读框和终止密码子、蛋白质编码区的碱基组中文摘要成、氨基酸及密码子的利用等方面把少棘蜈蚣与另三种多足类进行了比较。
Together these advances have produced a highly detailed and revolutionary picture : feathers originated and diversified in carnivorous , bipedal theropod dinosaurs before the origin of birds or the origin of flight 综合这些证据，便能描绘出十分详尽的革命性图像：羽毛的起源与分化都发生于肉食性、两足步行的兽足类恐龙身上，比鸟类的起源、甚至飞行的起源都还要早。
From the late middle ordovician to the end of ordovician , the cephalopods , gastropods and corals in the erlangping trough , and the conodonts , coral , brachiopods , cephalopods as well as trilobites in the xichuan shelf were from the north china province 在中奥陶世晚期至奥陶纪末，二郎坪海槽的腹足类、头足类和珊瑚与浙川陆棚的牙形石、珊瑚、腕足类、头足类和三叶虫均属华北生物省。
The dvm behavior of the copepod is controlled by multi - factors . the diversified migrating patterns show that copepod is the active decision - maker , which can achieve the optimal food intake during its avoiding predation by performing the normal dvm ; 2 足类的昼夜垂直迁移行为是由多因子控制的，其迁移模式的多样性表明，桡足类是主动的决策者，通过识别环境因子的变化，桡足类借助于常规的昼夜垂直迁移在逃避捕食压力的同时能够实现最优的食物摄取量； 2
A model is developed to analyze the tradeoff between benefits and costs involved in the strategies for the normal dvm of copepod . the venturous revenue is used as the criterion for this optimal tradeoff . it is a function of the environmental factors and the age of copepod 本文提出一个桡足类常规的昼夜垂直迁移模型，以分析桡足类在垂直迁移的决策过程中对利益和风险的权衡机制，风险收益被用来作为这种权衡机制的优化目标，它是环境因子和桡足类年龄的函数。
But the gut evacuation rates did not vary with the experimental temperature and body size . copepods usually performed feeding rhythms with maximum level at midnight and their feeding activities changed with the tide rhythms at the estuary area . in the laizhou bay , the daily grazing rate of the copepod population on phytoplankton was 20 . 81 ? 98 . 35 % of the primary production and 2 . 53 ? 6 . 36 % of the phytoplankton standing stock in summer 现场测得的桡足类摄食率结果表明，在莱州湾，夏季桡足类群体的日摄食量占初级生产力的20 . 81 ? 98 . 35 % ，占浮游植物现存量的2 . 53 ? 6 . 36 % ，潍河口，河口外浮游动物优势种群体的日摄食量占初级生产力的32 . 28 % ，占浮游植物现存量的14 . 12 % ，河口内对初级生产力的摄食压力< 3 % ，日摄食量小于浮游植物现存量的1 % 。
This research reviewed the relationships of the myriapods to other arthropoda , based on morphological and molecular sequence data and the studies of developmental biology . the review was followed the major controversies in the higher - level phylogeny of myriapods . the complete 18s rrna sequences of four groups of myriapoda plus hexapoda ( protura , diplura , insecta ) and crustacea were used for phylogenetic study 本研究首先从形态学性状、分子性状( dna和蛋白质)以及结合形态和分子性状、发育生物学的研究等方面对多足类动物与其他节肢动物之间的亲缘关系进行了综述，同时对多足类的系统发生研究进行了综述。
Flabellifera is one of the most important suborders of isopoda , and the commonest isopods of predominant marine provenance . the materials examined were obtained mainly by national oceanic investigations such as " the comprehensive oceanographic survey ( 1958 - 1960 ) " , " china vietnam comprehensive survey to beibu gulf ( golf of tonkin ) ( 1959 - 1960 , 1962 ) " and " china germany marine biological expedition to hainan island " ( 1990 , 1992 ) 中国科学院海洋研究所从50年代以来进行了若干次海洋生物考察，如“全国海洋综合调查( 1958 ? 1960年) ” 、 “中越北部湾海洋综合调查( 1959 - 1960 ， 1962年) ”及“中德海南岛生物联合调查( 1960 ， 1962年) ”等，获得了大量的等足类标本。
There were significant correlation between md and abundance of nematode ( p < 0 . 05 ) and weak negative correlation among water depth and numbers of meiofauna , nematode and copepods ( p > 0 . 05 ) . biomass spectra , the biomass distribution over a sequence of the body size intervals , provide dynamic information about the relationships among components in ecosystem 小型底栖动物、海洋线虫和桡足类的丰度和生物量与环境因子进行pearson相关性分析，结果显示海洋线虫的丰度与沉积物的中值粒径相关性显著( p 0 . 05 ) 。
In the summer stratified water column , the deeper the maximum depth of food distribution is , the stronger the dvm is performed ; the increase of the gradient of temperature in the thermocline layer can decrease the magnitude of the dvm and form the thermal barricade to the copepod ; the effects of the predation pressure on dvm is complex . on the one hand , the variations in the distribution depth of the predation pressure vs . the thermocline layer or the depth of the maximum food can modify the dvm patterns of the copepod . on the other hand , different predation pressure induces different dvm patterns 在夏季分层水体中，食物的最大分布深度越大，动物向下迁移的幅度也越大；温跃层的温度梯度增大可以减小动物迁移的幅度，成为桡足类垂直迁移的温度屏障；捕食压力对垂直迁移的影响较复杂，一方面，捕食压力的分布深度与温跃层或食物峰值的相对位置的变化能够改变桡足类垂直迁移的模式，另一方面，捕食压力强度不同，桡足类垂直迁移的幅度也不同，捕食压力越大，迁移的幅度越大，当捕食压力增加到一定程度，桡足类停止向上的迁移，大部分时间呆在水体深层，可能进入捕食压力引起的“滞育”状态。
