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幼鱼期
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  young stage
     Fifty to fifty-five days after hatching,the total body length is(15.62±1.65)mm; the scale covers the whole body of larvae which means the beginning of young stage.
     50~55天,体全长(15.62±1.65)mm,腹膜闭合,身体透明特点消失,进入幼鱼期
短句来源
     It enters into the young stage 73 days after hatchery, during which time its body grows to >164.0 mm, the length of its kiss accounts for >30% of the total and the proportion of various parts of the body is simmilar to that of the adult paddlefish.
     生长73日后为幼鱼期,全长>164.0mm,吻长大于全长的30%,身体各部分比例与成体相似。
短句来源
  “幼鱼期”译为未确定词的双语例句
     And in conditions of water temperature 19~28℃,salinity 20~27,pH 8.0~8.3,the larva opened its mouth at the 5th day.
     孵出仔鱼在水温19-28℃、盐度20-30、pH8.0-8.3条件下,孵化后5d开口、18d进入稚鱼期、40d进入幼鱼期.
短句来源
     The fertilizing eggs hatching took 15~16h,at the hatching condition of water salinity 28~30,temperture 18~22 ℃,pH8.2.It took 26~30days for larvae to metamorphose into youngfish.
     受精卵在盐度28~30.2,水温18~22℃,pH值8.2的环境中经15~16h孵化。 开口仔鱼在土池水温26.5~30.2℃,盐度18~24,pH值7.8~8.8的条件下,经26~30d培育,完成变态发育进入幼鱼期
短句来源
     The daily growth rate of larval fish at a temperture of 25℃ is about 0.2 mm during the first half month. The daily growth rate of the juvenile fish is about 1.0 mm, and that of the young fish about 1.5 mm.
     在25℃条件下,前半个月仔鱼日增长约0.2mm,稚鱼期日增长约1.0mm,幼鱼期日增长约1.5mm。
短句来源
     for young fish is 3.0. The other peak activitiesemerge in pH 2. 5, 5. 0~6. 0 in juvenile, and the other peak activities emerge in pH 2. 5, 5. 5and 7. 5 in young fish. It is suggested that the descend of the most suitable pH for α-amylaseas the growth of P. major is due to that development and the perfecting of the digestive sys-tem.
     稚鱼期α-淀粉酶的最适pH为4.0,在pH为25和5.0~60时出现小的活性峰值; 幼鱼期α-淀粉酶活性的最适pH为3.0,在pH为2.5、5.5、7.5时也出现小峰值。
短句来源
     The prolarval stage lasted 5 DAH, and postlarval stage appeared from 6 to 20 DAH, when water temperature, dissolved oxygen, pH and salinity were maintained at 24 ± 1℃, 10.1 ± 0.5 mg/1, 8.0 ± 0.2 and 29 ± 3%, respectively.
     在水温23~25℃、盐度26~32%、PH值为7.8~8.2时,孵化0至5天属于仔鱼期,从6到20天为稚鱼期,第21天起为幼鱼期
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  相似匹配句对
     (3) young fish stage: 33 d postfertilization.
     33日龄以后进入幼鱼
短句来源
     the complete period;
     定型;
短句来源
     The mortality of Yolk Fry stage reaches 80%, when the water temperature is 9℃.
     仔鱼幼鱼在 9℃死亡率达 80 %。
短句来源
     Stage Ⅲ.
     Ⅲ.
短句来源
     2. launching young fishes to man-made sea pasture.
     2.开展幼鱼放流;
短句来源
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  young stage
The dividing chloroplast was hardly detected in green leaves even at a young stage.
      
The result shows that gullied loessial hilly area is at the mature stage, and gullied loessial tableland area is at the young stage.
      
The Okinawa Trough is a very active tectonic zone at the margin of the Northwest Pacific and is typical of back-are-rifting at the young stage of tectonic evolution.
      
Pollinia of Cymbidium goeringii (Orchidaceae) were examined at a young stage (approx.
      
At the young stage, the generative cell (GC) has a spherically shaped main body with a large nucleus and 1 to 4 cytoplasmic extensions (up to 10 μm long) physically associated with a groove on one side of the vegetative nucleus (VN).
      
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The present paper deals with the embryonic and larval development of Clarias fuscus (Lacépède).

胡子鲶(Clarias fuscus)的胚胎和幼鱼的发育过程与蟾胡子鲶(C.batrachus)类似,器官分化时间和大小比例则有一定的差异。胡子鲶卵呈球形,富含卵黄,卵径1.7—1.9毫米;出膜仔鱼全长4.8—5.1毫米,比蟾胡子鲶约大1/3;幼鱼卵黄囊被吸收消失的时间比蟾胡子鲶迟1—2天。心脏的出现和搏动与开始出现血液循环的间隔时间只有3—5小时;耳石的出现几乎和心脏的出现处在同一时间内,与白鲢有较大的差异。在仔鱼前期居维氏管明显,但出现的时间比蟾胡子鲶稍迟些。仔鱼出膜形式与蟾胡子鲶不同,也与一般鱼类出膜形式不同。仔鱼是以腹部卵黄囊顶破卵膜,以卵黄囊先出膜,一般鱼类多数是以头部或尾部先出膜的。在水温28.5—31℃的条件下,从受精到孵化出膜的时间为28小时25分;幼鱼期共历时12—15天。

This paper reports the results of induced spawning and larval rearing of the mud skipper ( Boleophthalmus pectinirostris L.). The brood fish were injected either with HCG or with HCG and LHRH-A during the spawning season, from May to September of 1986. About 87 hours after insemination, the larvae began to hatch with the rates of 60% to 80% at water temperature of 26.5-29℃(<30℃)and salinity of 25-27‰. The newly hatched larvaewere reared in the imitated-ecosystem cement pools, fed with zooplankton and planktonic...

This paper reports the results of induced spawning and larval rearing of the mud skipper ( Boleophthalmus pectinirostris L.). The brood fish were injected either with HCG or with HCG and LHRH-A during the spawning season, from May to September of 1986. About 87 hours after insemination, the larvae began to hatch with the rates of 60% to 80% at water temperature of 26.5-29℃(<30℃)and salinity of 25-27‰. The newly hatched larvaewere reared in the imitated-ecosystem cement pools, fed with zooplankton and planktonic unicellular algae. 5 days after hatching the larvae began to feed on nanoplankton. The larvae reached the juvenile stage after 8 days of hatching and fed on rotifers, copepod nauplii and copepodities. 33 days after hatching the larvae developed into the young stage. The survival rates of 37.5-60% were obtained:

本文报道了大弹涂鱼诱导产卵和仔稚鱼培育的结果.亲鱼在生殖季节(5-9月)用HCG或HCG和LHRH-A混合激素催产.受精卵在水温26.5—29℃(不超过30℃),盐度25-27‰的条件下发育,经历87h孵出仔鱼,孵化率60-80%.仔鱼放养在模拟潮间带生态系的水泥池中,投喂动植物性饵料,第五天开始摄食微型浮游生物,第八天进入稚鱼期,开始摄食轮虫和桡足类幼体,第三十三天达到幼鱼期,成活率为37.5-60%.

With the morphology changing of the larve and fry of Epinephelus awoara, four stages were divided that were the pre-larva, the post-larva, fry and juvenile. A typical feature in the morphological development of E. awoara, was the remarkable lengthening of pectoral spine and abdominal spine. There were the obvious relations to the length of pectoral and abdominal spine with the total length of fry. The ratio of pectoral spine and abdominal spine was about 1:1 It was the power function relativity for the total...

With the morphology changing of the larve and fry of Epinephelus awoara, four stages were divided that were the pre-larva, the post-larva, fry and juvenile. A typical feature in the morphological development of E. awoara, was the remarkable lengthening of pectoral spine and abdominal spine. There were the obvious relations to the length of pectoral and abdominal spine with the total length of fry. The ratio of pectoral spine and abdominal spine was about 1:1 It was the power function relativity for the total length and the weight of larva and fry. It were divided three stages in whole daily agc growth of larva, fry and juvenile that the first stage was larva before 15-day age; the second stage was larva and fry before 40-day age; and the third stage was fry before 60-day age. There were a danger stage in the respective growth stages. The main reasons which lead to the each danger stage were (1) food, (2) metamorphosis, (3) massacre for each other. The countermeasure were (1) to be sure to supply suitable food in suitable time, (2)to prevent the water quality deteriorating and food nutrition lacking, (3) to separate fry frequently and to feed sufficiently. The individual size difference were both the congenital and the acquired factors.

本文根据青石斑鱼仔、稚鱼形态变化划分为前仔鱼期、后仔鱼期、稚鱼期、幼鱼期。背、腹棘的显著伸长是石斑鱼形态发育过程中的一个典型特征。背棘、腹棘长短与仔鱼全长有明显关系。背棘和腹棘比值近似1:1。仔稚鱼全长和体重两者呈幂函数相关。在整个仔、稚、幼鱼日龄生长中可分为三个阶段,第一阶段为15日龄前的仔鱼阶段,第二阶段为40日龄前的仔稚鱼阶段,第三阶段为60日龄前的稚幼鱼阶段。各生长阶段均伴随着一个危险期。导致各危险期的主要原因是(1)饵料,(2)变态,(3)自残。对策是(1)确保适时、适口饵料供应,(2)防止水质恶化和饵料营养缺乏,(3)勤分苗和充分投饵。在生长发育中,石斑鱼个体大小差异显著,导致此现象出现是因先天性和后天性二个方面造成。

 
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