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幼鱼生长
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  juvenile growth
     The results showed: the juvenile growth was slow and survival rate was only 65%, when EPA and DHA were insufficient in diets.
     结果表明,饵料中缺乏EPA、DHA 时,真鲷幼鱼生长缓慢,成活率仅达65 % ;
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  “幼鱼生长”译为未确定词的双语例句
     The optimum requirement for dietary protein,energy,fat,mineral and energy-protein ratio(E/P)was 40.06%, 13.09 kJ/g,6.02%,4% and 32.68 kJ/g in the diets of Schizothorax prenanti, respectively.
     适合幼鱼生长所需的蛋白质、脂肪、无机盐的质量分数分别为40.06%、6.02%、4%,总能为13.09 kJ/g,最适能量蛋白比(E/P)为32.68 kJ/g;
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     Combined the growth data with the analysis of fatty acid composition of muscle and liver, it was indicated that the optimum requirement of EPA and DHA are 0.5 % and 1.0~1.5 %.
     在饲料中不含EPA和DHA时,牙鲆幼鱼生长缓慢,肝体指数升高,当EPA和DHA在饲料中含0.5%和1.0%时,牙鲆生长最好;
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     We investigated the effects of copper on the growth and survival of juvenile loach (Misqurnus mizolepis) in flow-through or renewal test with a hardness of 115 mg/L(as CaCO_3).
     本文用流水和换水式试验,在水硬度为115mg/L(以CaCO_3计)条件下研究了铜对大鳞泥鳅幼鱼生长和存活的影响。
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     A 60-day rearing experiment was conducted in this study. The initial weight of juvenile Acipenser schrenckii was 43.90 ± 1.75 g, and the initial rearing density was 0.525 (LSD), 1.171 (MSD), and 2.138 (HSD) kg·m~ -2 , respectively.
     以体重(43·90±1·75)g史氏鲟为研究对象,研究了0·525、1·171和2·138kg·m-23种养殖密度对史氏鲟幼鱼生长、摄食率和消化率的影响,实验时间为60d.
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     Five experimental puffed diets in different protein level (45% ,48% ,50% ,52% ,54%) were fed to triplicatea groups (A-E) of the juvenile turbot for 88 days (n= 225;average body weight 34. 5 g±5. 5 g ).
     幼鱼225尾,平均分为5组(A~E),每组3重复。 分别喂以蛋白质水平为450,48%,50%,52%和54%的5种膨化颗粒饲料,探寻饲料蛋白质水平对大菱鲆幼鱼生长性能和水生态因子的影响,试验期88d。
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     Growth of juvenile Chinese sturgeon, Acipenser sinensis, captured from the Yangtze River estuary
     长江口中华鲟幼鱼生长特性
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     THE DEVELOPMENT AND GROWTH OF THE DIGESTIVE ORGANS OF THE YOUNG FRY(?)OF HYPOPHTHALMICHTHYS MOLITRIX(Guv.et Val.).
     白鲢幼鱼消化器官的发育生长
短句来源
     growth of diameter ,height and volume;
     材积生长
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     Growth of Order
     秩序的生长
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  juvenile growth
Larval and juvenile growth rates are within the range of growth rates of other populations.
      
Radial variation of earlywood vessel lumen diameter as an indicator of the juvenile growth period in ash (Fraxinus excelsior L.)
      
These characters are: juvenile growth, leaf morphology, production of secondary rosettes, flowering time, seed production, seed size and adult leaf production.
      
The Laird form of the Gompertz equation was used to determine growth curve parameters, and was suited to the juvenile growth data frequently collected from meat-type chickens.
      
Detection of quantitative trait loci for juvenile growth, flower bearing and rooting ability based on a linkage map of sugi (Cry
      
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Phototactic reaction appeared when elvers (the mean total length ranging-from 55.4mm. to 250.0mm.)were placed under the horizontal photogradicnt of 10-2-103 lux illumination. With the development of elvers the "amplitude of preferred light" intensity would change gradually from 101-l02lux to 10-2-10-1 lux. The phototactic reaction increased while it is under a weak illumination (10-2-10-1lux)and decreased while under a strong illumination(102-103lux).Photopia occured in the phototactic reaction of elvers within...

Phototactic reaction appeared when elvers (the mean total length ranging-from 55.4mm. to 250.0mm.)were placed under the horizontal photogradicnt of 10-2-103 lux illumination. With the development of elvers the "amplitude of preferred light" intensity would change gradually from 101-l02lux to 10-2-10-1 lux. The phototactic reaction increased while it is under a weak illumination (10-2-10-1lux)and decreased while under a strong illumination(102-103lux).Photopia occured in the phototactic reaction of elvers within 12 minutes, but varied with the different stages of development.The rules of this reaction were essentially the same whether the elvers were on background light or not, except that the reaction in the former case was weaker than that in the latter one. When the proper phototacric reaction was stronger, the influence of background light on elvers would become less.On the contrary, the influence would be greater if the reaction was weaker.

鳗鲡幼鱼(平均体长55.4—250.0毫米)在水平光梯度下对10~(-2)—10~3lux的光刺激都能表现出趋光反应。随着鳗鲡幼鱼的生长发育,其适宜光照强度也由10~1—10~2lux逐渐移至10~(-2)—10~(-1)lux.在弱光区(10~(-2)—10~(-1)lux)的趋光反应随着鳗鲡幼鱼的生长发育而逐渐坛大,而在强光区(10~2—10~3lux)情况正好相反。 鳗鲡幼鱼对光的反应在12分钟内就出现了光适应,但是其发育阶段不同,光适应也不一样。 在背景光下鳗鲡幼鱼趋光反应的辐度比无背景光时低。但趋光反应的规律在有或无背景光下基本相似。原来趋光反应较强者,受背景光的影响较小,反之则较大。

Two-boat trawl is generally in use for fishing prawn (Penaeus orientalis) at Po Haiarea in autumn. Po Hai is not only the main fishing ground for prawns, but is also thespawning and nursery ground of many commercial fishes. Unfortunately, a considerablenumber of young fishes have been destroyed in the prawn trawing every autumn. It is avery serious problem for the fish stock, so that, a new two-boat long square prawn trawlwas designed in 1974--1977, in order to increase catching efficiency and to reduce thedamage...

Two-boat trawl is generally in use for fishing prawn (Penaeus orientalis) at Po Haiarea in autumn. Po Hai is not only the main fishing ground for prawns, but is also thespawning and nursery ground of many commercial fishes. Unfortunately, a considerablenumber of young fishes have been destroyed in the prawn trawing every autumn. It is avery serious problem for the fish stock, so that, a new two-boat long square prawn trawlwas designed in 1974--1977, in order to increase catching efficiency and to reduce thedamage on young fishes. The characterstics of this newly designed trawl are: its square was twice as largeas that of the original one, the side panels were added to increase the covered net moutharea and the height of trawl, in order to prevent prawn in jumping over the headline ofthe net when they touc on the ground rope, and its cod-end mesh size was increased to50 mm. Consequently it saves a large quantity of young fishes from escape. The experimental results are satisfactory. In comparing with the old trawl model inwater tank, the principal advanges of new trawl model are the lower resistance, the higherheadline and the larger area of the covered mouth. The fishing operations have provedthat the eatching efficiency is increased over 40% and the damage to young fishes redu-ced over 60%.

为合理利用我国北方海区对虾资源,每年秋季在渤海使用机动渔船双拖网捕捞生产。由于渤海既是主要的对虾渔场,又是多种经济鱼类产卵繁殖和幼鱼生长的良好场所。在拖网捕虾的同时,大量捕到当年的幼鱼,损害渔业资源。因此,在1974—1977年研究一种能够多捕对虾、大量释放幼鱼的新型双拖网。 新型网的主要特点如下:它的天井网比原型网长—倍左右,并增加侧网使网口的覆盖面积和网高相应扩大,防止对虾接触网具后弹跳逃逸;将囊网网目放大到50毫米,以释放网内的幼鱼。 试验效果较为满意。在模型网水槽试验中,新型网的主要优点是阻力较小、网口较高和网口前方覆盖面积较大。捕捞生产试验证明可以增产对虾40%以上,少捕幼鱼不少于60%。

1. The food organisms of young mackerel of the year were diverse in species and they included polychaeta, Chaetognatha (Sagitta crassa), Copepoda, Amphipoda (young Themisto gracilipes), Caprellidea, Cephalopoda (Idiosepius paradoxa), fishes (young anchovy, Engraulis japonicus, young mugil, etc.), but fishes, cephalopods and crustaceans were the major varieties. Young mackerel of the year also ate seaweeds and other kinds of plant seeds, sand and mud. 2. In the Yantai-Weihai coastal region, young mackerel of...

1. The food organisms of young mackerel of the year were diverse in species and they included polychaeta, Chaetognatha (Sagitta crassa), Copepoda, Amphipoda (young Themisto gracilipes), Caprellidea, Cephalopoda (Idiosepius paradoxa), fishes (young anchovy, Engraulis japonicus, young mugil, etc.), but fishes, cephalopods and crustaceans were the major varieties. Young mackerel of the year also ate seaweeds and other kinds of plant seeds, sand and mud. 2. In the Yantai-Weihai coastal region, young mackerel of the year, less than 89 mm FL in size, fed mainly on planktonic organisms. When they reached to the size larger than 80 mm, they could take various specieses of food organisms, showing their omnivorous feeding habits. There was a little change in food items taken by mackerel from year to year. In the Qingdao coastal region young mackerel of the year fed mainly on Idiosepius paradoxa, juveniles of Themisto gracilipes and juveniles of fish, but some groups fed among the dense clusters of seaweeds, consequently, in their stomach Caprellidea, seahorse, thread of hemp, etc. could be found. 3. As the FL of young mackerel of the year become longer, a slight change in their preference of food items could be observed, though it was not conspicuous. This was due to the feeding habits of the young fish of 35 mm FL was nearly similar to that of the adult and in the shallow coastal waters planktonic organisms were scarce but young anchovies (Engraulis japonicus) and mugils and Idiosepius paradoxa, etc. were in abundance. 4. Young mackerel of the year fed day and night. At night they followed the tide and came into the shallow coastal waters where they snatched juveniles of anchovy and Themisto gracilipes throughout the whole night and daring the daytime they fed on planktonic organisms, benthos, young fishes, seaweeds and other kinds of plant, seeds, etc.. 5. Since the adult mackerel fed mainly on adults of anchovy (Engraulis japonicus) and Themisto gracilipes, young mackerel of the year fed mainly on the juveniles of anchovy and Themisto gracilipes. There was a close relation in nutrition between mackerel and anchovy ane Themisto gracilipes. Adult mackerel lived in the coastal waters deeper than 20 meters, where they searched their food organisms, while young mackerel of the year lived in the coastal waters shallow than 20 meters, where they might grew up and took these areas as their nursery grounds.

1.当年生鲐鱼幼鱼摄食种类十分广泛,包括多毛类、毛颚类的强壮箭虫、桡足类、端足类的细长脚(虫戎)幼体、钩虾、麦杆虫,头足类的微鳍乌贼,鱼类的鳀鱼幼鱼、梭鱼幼鱼等,其中以鱼类、头足类、甲壳类为主;并吞食海藻碎片、植物碎屑、种子、砂泥等,有杂食性的表现。 2.烟威沿岸海区叉长35—194毫米当年生鲐鱼幼鱼以微鳍乌贼、细长脚(虫戎)幼体、鯷鱼幼体等为主要食物。叉长80毫米以下个体主要以浮游生物为食,80毫米以上个体摄食种类广泛,有杂食性表现。频年摄食种类变化不大。青岛沿岸当年生鲐鱼幼鱼也以微鳍乌贼、细长脚(虫戎)幼体、鱼类幼鱼等为主要食物,但有部分群体在海藻丛中摄食,所以在胃中出现麦杆虫、海马、麻绳丝等。 3.随着体长增长有食物转化现象,但不很显著。原因:一为当年生鲐鱼幼鱼叉长35毫米即近似成鱼的摄食习性,一为沿岸浅水浮游生物较贫乏,鲐鱼、梭鱼等幼鱼和微鳍乌贼等较多。 4.当年生鲐鱼幼鱼昼夜均进行摄食,夜间各个时间随着潮流游到沿岸浅水攫食鯷鱼幼鱼和细长脚(虫戎)幼体。白天摄食浮游生物、底栖生物、鱼类幼鱼以及海藻碎片、植物碎屑、种子等。 5.鲐鱼的成鱼以鯷鱼和细长脚(虫戎)为主要食物,当年生鲐鱼幼鱼也以鯷鱼幼鱼和细长...

1.当年生鲐鱼幼鱼摄食种类十分广泛,包括多毛类、毛颚类的强壮箭虫、桡足类、端足类的细长脚(虫戎)幼体、钩虾、麦杆虫,头足类的微鳍乌贼,鱼类的鳀鱼幼鱼、梭鱼幼鱼等,其中以鱼类、头足类、甲壳类为主;并吞食海藻碎片、植物碎屑、种子、砂泥等,有杂食性的表现。 2.烟威沿岸海区叉长35—194毫米当年生鲐鱼幼鱼以微鳍乌贼、细长脚(虫戎)幼体、鯷鱼幼体等为主要食物。叉长80毫米以下个体主要以浮游生物为食,80毫米以上个体摄食种类广泛,有杂食性表现。频年摄食种类变化不大。青岛沿岸当年生鲐鱼幼鱼也以微鳍乌贼、细长脚(虫戎)幼体、鱼类幼鱼等为主要食物,但有部分群体在海藻丛中摄食,所以在胃中出现麦杆虫、海马、麻绳丝等。 3.随着体长增长有食物转化现象,但不很显著。原因:一为当年生鲐鱼幼鱼叉长35毫米即近似成鱼的摄食习性,一为沿岸浅水浮游生物较贫乏,鲐鱼、梭鱼等幼鱼和微鳍乌贼等较多。 4.当年生鲐鱼幼鱼昼夜均进行摄食,夜间各个时间随着潮流游到沿岸浅水攫食鯷鱼幼鱼和细长脚(虫戎)幼体。白天摄食浮游生物、底栖生物、鱼类幼鱼以及海藻碎片、植物碎屑、种子等。 5.鲐鱼的成鱼以鯷鱼和细长脚(虫戎)为主要食物,当年生鲐鱼幼鱼也以鯷鱼幼鱼和细长脚(虫戎)幼体为主要食物。因此,鲐鱼成、幼鱼对鯷鱼、细长脚(虫戎)的营养关系十分密切。鲐鱼分布在水深20米以外的近海索饵,当年生鲐鱼幼鱼分布在沿岸育肥,这样,促使鲐鱼成、幼鱼各自充分利用分布范围内所能得到的食物,调节成、幼鱼的需要和加速当年生鲐鱼幼鱼的生长。

 
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