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predation
相关语句
  捕食作用
    STUDIES ON PREDATION OF LEMNIA CIRCUMUSTA TO PSEUDOPHACOPTERON CANARIUM AND ITS SIMULATED MODEL
    红基盘瓢虫对橄榄星室木虱捕食作用及其模拟模型的研究
短句来源
    The relationship between predation ratio (E) and density of O. sauteri adults (P) was described by equation of E=0.5224 P-0.7148, and the relationship between intensity of scrambling competition (I) and the density of O. sauteri adults (P) was I =0.9689logP + 0.0763.
    在相同猎物密度条件下,随着东亚小花蝽成虫密度的增大,其平均捕食量逐渐减少,捕食作用率E也相应地降低,捕食作用率E与东亚小花蝽成虫密度P的关系为E=0.5224P-0.7148,分摊竞争强度I与东亚小花蝽成虫密度P的关系为I=0.9689logP+0.0763。
短句来源
    Studies on the Predation Functional Responses of Hylyphantes graminicola to Drosophila melanogaster
    草间钻头蛛(Hylyphantes graminicola)对果蝇(Drosophila melanogaster)捕食作用的研究
短句来源
    Studies on the Predation and Simulation Model of Pardosa Astrigera L.Koch to Vegetable Aphides
    星豹蛛(Pardosa astrigera L. Koch)对菜蚜的捕食作用及模拟模型的研究
短句来源
    Detection of Predation on Bemisia tabaci by Using SCAR Markers
    天敌对烟粉虱捕食作用的SCAR标记检测
短句来源
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  捕食
    At the range of 10~25℃, the relationship between predation ratio(y)and temperature(x)was y=3.4x-7.9375,and at 25~35℃, y=137.08-2.25x.
    在25~35℃间的捕食率y与温度x的关系为y=137.08-2.25x。
短句来源
    The predation ratio was the highest at 25℃reaching 79.4%.
    25℃下小十三星瓢虫捕食率最高,捕食率达79.4%。
短句来源
    The relationship between predation ratio (E) and density of O. sauteri adults (P) was described by equation of E=0.5224 P-0.7148, and the relationship between intensity of scrambling competition (I) and the density of O. sauteri adults (P) was I =0.9689logP + 0.0763.
    在相同猎物密度条件下,随着东亚小花蝽成虫密度的增大,其平均捕食量逐渐减少,捕食作用率E也相应地降低,捕食作用率E与东亚小花蝽成虫密度P的关系为E=0.5224P-0.7148,分摊竞争强度I与东亚小花蝽成虫密度P的关系为I=0.9689logP+0.0763。
短句来源
    Effects of Three Insecticides on Predation Function of (Stenus sp.)
    三种杀虫剂对大眼隐翅虫(Stenus sp.)捕食功能的影响
短句来源
    Bt cotton impacts on the growth and predation behavior of spiders
    转Bt棉花对蜘蛛生长发育及捕食行为的影响
短句来源
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  “predation”译为未确定词的双语例句
    The average amount of predation for an adult is 9 pupae or 276.6 eggs per day.
    1头成虫日平均取食松干蚧茧蛹约9只,或卵276.6拉;
短句来源
    The predation of Hippodamia variegata and Leucopis annulipes on the aphid could be well described by Holling II type, with the models as 1/ N a = 1 2550/ N +0 0046 and 1/ N a = 1 3280/ N +0 0071 respectively.
    多异瓢虫Hippodamia variegata Goeze成虫和斑腹蝇Leucopisannulipes Zett.3 龄幼虫对麦双尾蚜的功能反应均为II型, 关系式分别为1/ Na = 1-2550/ N+ 0-0046 和1/ Na = 1-3280/ N+ 0-0071。
短句来源
    EIPC of natural death were 1.3607 and 1.3554. EIPC of parasitism and disease in growing and harvested banana trunks were 1.1988 and 1.1668. The factor of predation and others was important.
    自然死亡作用次之 ,成长蕉株为 1.36 0 7,留头蕉茎上为 1.35 5 4 ; 寄生或疾病因子作用最小 ,成长蕉株为 1.198 8,留头蕉茎上为 1.16 6 8。
短句来源
    the fitted Holling disc equation was Na=1.1576Nt/(1+0.00348Nt), χ 2 test showed that the theoretical expectation calculated by the fitted Holling disc equation fitted well with the observed value. The predation selectivity experiment revealed that adult C.
    七星瓢虫成虫对烟蚜的功能反应属HollingⅡ型反应 ,拟合的圆盘方程为Na =1 .1 5 76Nt ( 1 +0 .0 0 3 48Nt) ,χ2 检验表明圆盘方程理论值与实测值相符。
短句来源
    A STUDY ON PREDATION OF NATURAL ENEMIES TO THREE RICE PEST IN SECTS BY SEROLOGICAL METHOD
    血清法探讨天敌对三种稻田昆虫的抑制作用
短句来源
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  predation
Effects of exotic species on endangered species through predation
      
They are generalist predators and thus may affect native species through predation.
      
Since fecundity is relatively low and parents do not take care of the egg masses, predation can strongly affect the abundance of this species.
      
Both mollusk species exhibit seasonal variations in number, which are due to predation by sturgeon and natural mortality.
      
How plankton copepods avoid fish predation: From individual responses to variations of the life cycle
      
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Weisong sympherobiid (Sympherobius weisong Yang) discovered in Hangzhou and Ning County in Zheiiang province in recent years is one of the important natural enemies, which preys both on Matsucoccus matsumurae (Kuwana)and Matsucoccus massonianae Y. & H. It has two generations a year, but no winter diapause. The first generation occurs from April to late November. The second generation occurs from late August to June the following year. The time of its occurrence is well synchronized with that of the scale. The...

Weisong sympherobiid (Sympherobius weisong Yang) discovered in Hangzhou and Ning County in Zheiiang province in recent years is one of the important natural enemies, which preys both on Matsucoccus matsumurae (Kuwana)and Matsucoccus massonianae Y. & H. It has two generations a year, but no winter diapause. The first generation occurs from April to late November. The second generation occurs from late August to June the following year. The time of its occurrence is well synchronized with that of the scale. The average amount of predation for an adult is 9 pupae or 276.6 eggs per day. A nymph might consume 2837.1 eggs for life time, and it can also prey on the nymph and adult of the scales. Observations indicated that it might exert an obvious suppression on the population of the scales. Experiments showed that its nymph and adult could be reared with eggs or pupae of the scales, eggs of rice moth, a variety of aphids or diet No. Ⅰ.

在浙江省杭州市郊和鄞县宝幢一带的马尾松林中,卫松益蛉1年发生2代,无冬眠现象。第1代发生于4月上旬至11月下旬,第2代发生于8月下旬至翌年6月下旬。其成虫和幼虫发生期正与日本松干蚧和马尾松干蚧的繁殖期相吻合;1头成虫日平均取食松干蚧茧蛹约9只,或卵276.6拉;1头幼虫全期取食松干蚧卵2837.1粒,也捕食松干蚧若虫和雌成虫等。这对松干蚧虫口的增殖起着明显的抑制作用。卫松益蛉成虫和幼虫可以用松干蚧卵,若虫、茧蛹和雌成虫;米蛾卵,以及多种蚜虫或代饲料1号饲养。

The functional response of lady bird(Coccinella septempunctata L.) to prey on cotton aphids(Aphis gosspii G.)was tested in cages.The number of aphids attacked(Na)was calculated as Na=Rn_3-n_4.where, R=aphid rate of population increase;n_3=total number of ahids bing counted on the 3rd day before predation;n_4=surviving after 24 hrs of predation on the 4th day.A functional response roughly fit- ting Holling—2 was obtained(a′=0.77;Th=0.00259).Hassell's mutual interference equation was confirmed(Q=0.487;m=0.6284).It...

The functional response of lady bird(Coccinella septempunctata L.) to prey on cotton aphids(Aphis gosspii G.)was tested in cages.The number of aphids attacked(Na)was calculated as Na=Rn_3-n_4.where, R=aphid rate of population increase;n_3=total number of ahids bing counted on the 3rd day before predation;n_4=surviving after 24 hrs of predation on the 4th day.A functional response roughly fit- ting Holling—2 was obtained(a′=0.77;Th=0.00259).Hassell's mutual interference equation was confirmed(Q=0.487;m=0.6284).It is reasoned that the population of aphids,together with lady birds within an enclosed system would be confirmed to an exponential increase or decrease.

用罩笼方法测定了七星瓢虫成虫捕食棉蚜的功能反应。瓢虫一日捕蚜量(Na)用蚜虫日增长倍数(R)与初始蚜量之乘积减去剩余蚜量求得。瓢虫捕食蚜量的功能反应曲线符合 Holling—Ⅱ型,(a′=0.77;Th=0.00259)。测定了瓢虫干扰常数(m)和寻找常数(Q),(m=0.6284;Q=0.487)。根据功能反应曲线推论,当棉蚜与瓢虫共存于一个封闭系统内时,棉蚜的种群动态模型为N_((t+1))=RN_((t))exp((-0.77P)/(1+0.77×0.00259N_((t)))当 R 与 P 取定值时,N_((t))对 N_((t+1))的上升或下降起决定性作用。

The life history and the predation efficiency of Chrysopa boninensis was studied under laboratory condition. The mean duration of the eggs required 3.1 days to hatch, the 1st instar lasted 3.2 days, the 2nd 2.4 days, and the 3rd 3.3 days, giving a larval stage of 8.9 days. The pupal satge lasted 9.2 days. Males lived a mean of 61.8 days and females a mean of 101.7 days. The pre-oviposition period averaged 8.4 days. A mean of 400.3 eggs was laid by each female, the maximum being 746 eggs. Females laid the...

The life history and the predation efficiency of Chrysopa boninensis was studied under laboratory condition. The mean duration of the eggs required 3.1 days to hatch, the 1st instar lasted 3.2 days, the 2nd 2.4 days, and the 3rd 3.3 days, giving a larval stage of 8.9 days. The pupal satge lasted 9.2 days. Males lived a mean of 61.8 days and females a mean of 101.7 days. The pre-oviposition period averaged 8.4 days. A mean of 400.3 eggs was laid by each female, the maximum being 746 eggs. Females laid the greatest number of eggs during the period from 16 - 24 days after emergence. C. boninensis was well adapted to wide variety of relative humidity and only the percentage of cocooning was affected by humidity.An average of 149.1 larvae of the citrus leaf-miner, Phyllocnistis citrella, were consumed with each green lacewing larva, with the increase of age of larvae the predation capacity was gradually increased. The optimum temperature for the predation efficiency is 35℃, under 15℃ and over 40℃, it was very low. The result can be described by the following equation: Na = 0.0105775(r-35)2+8. 1907336The effect of humidity on the predation efficiency can be described by using Logistic curve:The funtional response of the green lacewing to citrus leaf-miner was the Holl-ing 's II type, which can be desribed by using Holling 's disc equation:Na =1.1756671N/(1+0.1689855N)Mutual interference affected the predation efficiency of C. boninensis. The funtional response to itself density can be described by using Watt's equation:A = l0.6905696p-0.1091787 and the predation rate was.E = 0.7622331p-0.4811209

在实验室条件下,亚非草蛉的平均发育历期为:卵期3.1天,幼虫8.9天,成虫寿命雌虫101.7天、雄虫61.8天,产卵前期8.4天。每雌虫平均产卵量400.3粒。最大产卵量746粒。产卵高峰期为羽化后的16—24天。亚非草蛉对湿度的适应范围较广,但幼虫的死亡率与湿度的关系大。 亚非草蛉幼虫一生捕食柑桔潜叶蛾幼虫数平均为149.1头,其日捕食量随龄期的增大而增加。温度对草蛉幼虫的捕食效应具有显著的影响,在35℃时达到最高的捕食效应,而在15℃以下和40℃以上,则受到明显的限制。湿度对草蛉捕食潜叶蛾幼虫的影响呈Iogistic曲线。草蛉对潜叶蛾幼虫密度的功能反应属HollingⅠ型反应。草蛉幼虫对其自身密度的功能反应可用Watt模型模拟。草蛉对潜叶蛾幼虫的捕食作用率随捕食者个体间的相互干扰作用的增加而下降,两者之间的关系随草蛉幼虫数的增加呈幂函数下降曲线。 田间观察及室内试验结果表明,亚非草蛉是柑桔潜叶蛾的一种重要的捕食性天敌。

 
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