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状幼体
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  zoeal
     The tolerant ability of the zoeal larvae in lacking of oxygen is cmparatively muchlower than that of fishes, when the dissolved oxygen is at 2 mg/L, it would cause a largequantity of zoeal larvae to die, and if further reduced to 1. 4 mg/L, Then death occursinstantly.
     中华绒螯蟹溞状幼体对缺氧的忍受度远较鱼类低,当溶氧量在2mg/L时引起溞状幼体大量死亡,下降至1.4mg/L可引起立即死亡。
短句来源
     Effect of delayed feeding on survival, metamorphosis and growth of zoeal of Penaeus vannamei
     延迟投饵对南美白对虾状幼体存活、变态和生长的影响
短句来源
     Higher rate of "extra instar" (zoea--6)appeared at 25℃ which is suboptimalfor later zoeal instars.
     在对后期溞状幼体相对不适的 25℃下,溞状幼体发育期数变异的出现率较高。
短句来源
     The present species passes through four zoeal stages before metamorphosis to the megalopal stage. The megalopa was attained about 12 days after hatching. The culture was carried out at 25 -26℃, saltinity of 15 and photo intensity 200 - 300Lx.
     在水温25~26℃、盐度15、光照度200~300Lx的条件下,从第一期■状幼体出膜到大眼幼体出现历时12d;
短句来源
     The ontogenetic polymorphism of isozyme and the isozyme activity at the 1st zoeal stage newly after hatching were also discussed in the present paper.
     讨论了三疣梭子蟹同工酶的个体发生多态性和刚孵化的第一期状幼体的同工酶活性。
短句来源
  “状幼体”译为未确定词的双语例句
     Different kinds of medicines were used to treat filth disease of Zoea of Litopenaeus vannamei . The results indicate that protozoacide 3.0×10 -6 in concentratoin mixed either with effectual chlorine 0.15×10 -6 in concentration NaClO +1.5mg/L or with of 0.01×10 -6 in concentrations oxytetracycline and concentrations +1.5mg/L of oxytetracycline can cure this disease.
     用不同药物治疗凡纳对虾状幼体黏脏病 ,结果表明 :用浓度为 3× 10 - 6 养虾丹、混合施用 0 .15× 10 - 6 次氯酸钠 + 1.5mg/L土霉素或 0 .0 1× 10 - 6 的亚甲基蓝 + 1.5mg/L土霉素可治疗凡纳对虾幼体黏脏病
短句来源
     Significantly higher survival rate was observed in zoea-stage larvae treated with 0.1, 0.3 and 0.5mg/ml glucan, in mysis-stage larvae treated with 0.3 and 0.5mg/ml glucan than that of larvae treated with 0 or 1 mg/ml glucan.
     结果显示,攻毒后0.1、0.3和0.5mg/ml处理组的溞状幼体的存活率显著高于对照组(P<0.05),0.3和0.5mg/ml处理组的糠虾幼体的存活率显著高于对照组(P<0.05)。
短句来源
     Oxygen consumption and ammonia excretion of zoea(Z1~Z5) of Scylla serrata were examined by using bottle water method and flowthrough system at six temperature(22,24,26,28,30 and 32 ℃).
     用水瓶法和径流装置测定了锯缘青蟹各期状幼体(Z1~Z5)在不同温度(22、24、26、28、30和32℃)下的耗氧率和氨氮排泄率.
短句来源
     Ultrastructure of compound eyes in early zoaea stages of Macrobrachium rosenbergii
     罗氏沼虾(Macrobrachium rosenbergii)溞状幼体早期的复眼超微结构
     The result showed that the PNR of Zoea-Ⅰ was about 110h.
     结果证实中华绒螯蟹溞状幼体Ⅰ期的PNR在110h左右。
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  相似匹配句对
     Study on Disease Prevention and Treatment of Mitten Crab Zoea in Early Stage
     河蟹早期溞幼体病害防治研究
短句来源
     The effects of different diet on metamorphosis and development of Eriocheir si nensis zoeae larvae
     饵料对河蟹溞幼体变态发育的影响
短句来源
     Verruciform xanthoma of skin
     皮肤疣黄瘤
短句来源
     Halo Coronal Mass Ejection
     晕日冕物质抛射
短句来源
     Regulation of molting in crustacean larvae
     甲壳动物幼体蜕皮的调控
短句来源
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  zoeal
Five zoeal stages and one megalopa are identified, and detailed descriptions and illustrations are provided for each stage.
      
THE EARLY ZOEAL STAGES OF ALPHEUS HEEIA BANNER >amp; BANNER, 1975 REARED IN THE LABORATORY (DECAPODA, CARIDEA, ALPHEIDAE)
      
Three zoeal stages of Alpheus heeia Banner >amp;amp; Banner, 1975 are described and illustrated in detail for the first time.
      
The presence or absence of the distal coxal endite of the maxilla of species in the Alpheidae and the zoeal differences between A.
      
Behaviours of shell entering, copulation, and zoeal release as seen in P.
      
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The present paper presents results of our studies on the larval development of Eriocheir sinensis reared in the laboratory.Eriocheir simnsis is widely distributed in. the coastal provinces of China. The crab lives and grows in freshwater and spawns in the estuaries. The larva hatches as a zoae-larva. It moults six times after breaking the egg-membrane to accomplish the larval phase in the .metamorphosis. Based on the morphological characteristics of the developing larva, the whole process of development may...

The present paper presents results of our studies on the larval development of Eriocheir sinensis reared in the laboratory.Eriocheir simnsis is widely distributed in. the coastal provinces of China. The crab lives and grows in freshwater and spawns in the estuaries. The larva hatches as a zoae-larva. It moults six times after breaking the egg-membrane to accomplish the larval phase in the .metamorphosis. Based on the morphological characteristics of the developing larva, the whole process of development may be divided into six stages, that is. five zoeal stages and one megalopa stage.First zoeal stageThe carapace bears eight to nine spines on each side of the postero-ventral margin. The compound eye is stalkless. Abdomen is six-segmented. Three pairs of setae are situated at the middle of the posterior margin of the caudal furca. There are four natatory setae on the distal portion of the exopodites of the first and second maxi-lliped.Second zoeal stageThe carapace bears eleven to twelve spines and five setae on each side of postero-ventral margin. The compound eye is stalked. There are six natatory setae on the distal portion of the exopodites of the first and second maxilliped.Third zoeal stageThe carapace bears ten to thirteen spines and nine setae. Abdomen is seven-segmented. The caudal furca becomes separated from the sixth abdomenal segment; four pairs of setae are arranged at the middle of the posterior margin of the caudal furca. The endopodite of the antenna appears as a bud. There are eight natatory setae on the distal portion of the exopodites of the first and second maxillipeds. The buds of the pereiopod and pleopod may be seen on the cephalothorax and abdomen.Fourth zoeal stageThe carapace bears seventeen to eighteen spines and twelve setae. The endopodite of the antenna becomes elongated. There are ten natatory setae on the distal portion of the exopodites of the first and second maxillipedg. The poreiopod and pleopod are elongated. Fifth zoeal stageThere are about eighteen spines and numerous setae on each side of postero-ventral margin of the carapace. At the middle of the posterior margin of the caudal furca there are five pairs of setae. The endopodite of the antennule appears as a bud, and the endopodite of the antenna is two-segmented and much elongated. Mandible has a palp. There are twelve natatory setae on the distal portion of the exopodites of the first and second maxilliped. The segmentation of the third maxilliped is nearly complete. The exopodite and endopodite of the pleopod begin to make appearance.Megalopa stageDorsal, rostral and lateral spines disappear on the carapace, the fore margin of the carapace is birostrumed. The stalk of the compound eye is lengthened. Abdomen is seven-segmented, and the caudal furca disappears. The palp of the mandible is three-jointed. The maxilliped differs much from that of the zoeal stages, it is formed by protopodite, endopodite, exopodite and epipodite. The pleopod is developed with natatory satae.

1.本文所报道毛蟹的幼体发育试验,全部是在实验室内进行的。 2.毛蟹的幼体发育共经五个(氵蚤)状幼体期和一个大眼幼体期。卵孵化出膜的幼体即为第一(氵蚤)状幼体,而不是早期(氵蚤)伏幼体或原(氵蚤)伏幼体。这两种幼体应该是在卵膜内度过的。 3.在水温11—22℃,盐度为9‰的实验室条件下,从幼体出膜到第一期幼蟹的出现,共经39—40天。每蜕一次皮,即进入另一发育时期,其所需的时间,随着温度的升高而缩短。其发育速度见下表: 幼体名称 水温(℃) 日数 第一(氵蚤)状幼体 11—17 7—9 第二(氵蚤)状幼体 17—18 5—6 第三(氵蚤)状幼体 18—20 6—7 第四(氵蚤)状幼体 16—19.5 5—6 第五(氵蚤)状幼体 16.5—19 7—8 大眼幼体 19—22 9—10 4.饵料、盐度、水温和水质等因子对幼体有着不同程度的影响。 5.(氵蚤)状幼体以两对颚足外肢末端的羽伏刚毛的数目,胸、腹肢的大小与形状和尾叉内面中部刚毛的数目为分期的主要依据。

Aseries of experments have been conducted in determining the influences of the totalsalinity, chemical ingredients, water temperature, dissolved oxygen, and food in theartificial sea water, to the copulation, breeding, hatching, and the development of thezoeal larvae of the woolly-handed crab. The result of the experiments manifests that when the optimum total salinify forspawnmg of the crab is 10‰ to 17‰. and the content of calcium is between 144 mg/L to335 mg/l, the zoeal larvae may develop to megalop stage...

Aseries of experments have been conducted in determining the influences of the totalsalinity, chemical ingredients, water temperature, dissolved oxygen, and food in theartificial sea water, to the copulation, breeding, hatching, and the development of thezoeal larvae of the woolly-handed crab. The result of the experiments manifests that when the optimum total salinify forspawnmg of the crab is 10‰ to 17‰. and the content of calcium is between 144 mg/L to335 mg/l, the zoeal larvae may develop to megalop stage and within this range there is alendency that the rate of survival is increased by the raise of the caleium content. Thepreferable conlents of Mg, K, and Fe are 461 mg/L--935 mg/L, 200 mg/L--400 mg/Land 0. 02 mg/L--0. 05 mg/L respectively. The content of Cu is very slight and negligi- ble. The changes of the water temperature influence greatly to the hatching of the eggs,and the development of the zoeal larvae. The optimum water temperature for the breedingof the crab is above 14℃, and the hatching of the eggs demands 13--27 days at thewater temperture of 21.1--26.9℃. The optimum temperature for the development ofzoeal larvae is slightly higher than that of the hatahing. The tolerant ability of the zoeal larvae in lacking of oxygen is cmparatively muchlower than that of fishes, when the dissolved oxygen is at 2 mg/L, it would cause a largequantity of zoeal larvae to die, and if further reduced to 1. 4 mg/L, Then death occursinstantly. The optimum content of the dissolved oxygen for normal development of thezoeal larvao is above 4 mg/L. The ideal food in cultivating the zoeal larvae of the woolly-handed crab is thenauplius larvae of the brine shrimps.

本文报道了用人工配制的海水繁殖中华绒螯蟹的试验。介绍了人工配制海水的总盐度、各种主要化学成分含量、水温、溶氧量、饵料等,对中华绒螯蟹交配、产卵、孵化、溞状幼体的发育的影响。 据试验,总盐度在10‰到17‰对中华绒螯蟹的促产是比较适宜的。其中钙的含量在144mg/L至335mg/L之间时,都有可能将溞状幼体育成大眼幼体,而且在此幅度内随着含量的提高育成率也有提高的趋势。镁的含量以461 mg/L到935 mg/L之间比较适宜。钾的适宜含量约在200 mg/L到400 mg/L之间。铁的适宜含量是0.02mg/L到0.05mg/L。铜的需要量似乎极微,即使缺无也无明显影响。 水温变化对蟹卵的孵化及溞状幼体的发育有影响。中华绒螯蟹产卵时的适宜温度在14℃以上,蟹卵在21.1~26.9℃条件下,约需13-27天孵化,溞状幼体的发育的适温似乎比孵化时的适温要稍稍高些。 中华绒螯蟹溞状幼体对缺氧的忍受度远较鱼类低,当溶氧量在2mg/L时引起溞状幼体大量死亡,下降至1.4mg/L可引起立即死亡。溞状幼体正常发育所需的溶氧量在4mg/L以上。...

本文报道了用人工配制的海水繁殖中华绒螯蟹的试验。介绍了人工配制海水的总盐度、各种主要化学成分含量、水温、溶氧量、饵料等,对中华绒螯蟹交配、产卵、孵化、溞状幼体的发育的影响。 据试验,总盐度在10‰到17‰对中华绒螯蟹的促产是比较适宜的。其中钙的含量在144mg/L至335mg/L之间时,都有可能将溞状幼体育成大眼幼体,而且在此幅度内随着含量的提高育成率也有提高的趋势。镁的含量以461 mg/L到935 mg/L之间比较适宜。钾的适宜含量约在200 mg/L到400 mg/L之间。铁的适宜含量是0.02mg/L到0.05mg/L。铜的需要量似乎极微,即使缺无也无明显影响。 水温变化对蟹卵的孵化及溞状幼体的发育有影响。中华绒螯蟹产卵时的适宜温度在14℃以上,蟹卵在21.1~26.9℃条件下,约需13-27天孵化,溞状幼体的发育的适温似乎比孵化时的适温要稍稍高些。 中华绒螯蟹溞状幼体对缺氧的忍受度远较鱼类低,当溶氧量在2mg/L时引起溞状幼体大量死亡,下降至1.4mg/L可引起立即死亡。溞状幼体正常发育所需的溶氧量在4mg/L以上。 盐水丰年虫的无节幼体是培育中华绒螯蟹的溞状幼体理想的饵料。

1. In the spawning season of penaeid shrimp the bottom water temperature in the Bo-Hai Bay was found to range from 13 to 23℃ and in full swing of spawning season from 13 to 18℃. The lowest water temperature in the spawning ground for penaeid shrimp to spawn was 13℃.The salinities in the spawning ground varied widely in the range and from year to year and the range of fluctuation was 23.0 to 30.3‰. 2. The time of the beginning of the spawning period in each year varied with water temperature. In the spawning...

1. In the spawning season of penaeid shrimp the bottom water temperature in the Bo-Hai Bay was found to range from 13 to 23℃ and in full swing of spawning season from 13 to 18℃. The lowest water temperature in the spawning ground for penaeid shrimp to spawn was 13℃.The salinities in the spawning ground varied widely in the range and from year to year and the range of fluctuation was 23.0 to 30.3‰. 2. The time of the beginning of the spawning period in each year varied with water temperature. In the spawning ground in the Bo-Hai Bay, the earliest spawning date recorded was on 2 May in the years 1967, 1973 and 1978 and the latest date was on 18 May, 1969. The whole spawning season prolonged a rather long time, nearly one month. 3. Eggs and larvae of penaeid shrimp were not uniform in their distribution in sea water. Eggs tended to sink but they were suspended in the moving sea water. There were apparently more eggs in the bottom than in the surface layer, more nauplii and zoea in the surface layer than in the bottom, and more mysis, especially post larvae, in the bottom than in the surface layer. 4. Spawning of penaeid shrimp took place in the vicinity of estuaries, but only when the salinity of the sea water became higher could the eggs hatch and metamorphosis. The lowest salinity at which zoea and mysis have been found was 17.9‰. Post larvae displayed an anadromous behaviour and might migrate up rivers and reach the areas more than 50 km away from estuaries. The lowest salinity at which the post larvae have been found was 0.86‰. 5. The studies on the habits of post larvae and juvenile shrimp will provide a biological basis which is of considerable importance in establishing the fishery management regulations, including closed area and closed season for various fishing gears, in order to conserve penaeid shrimp resources.

1.对虾产卵期间底层水温为13—23℃,产卵盛期水温为13—18℃,13℃是渤海湾产卵场对虾产卵的最低水温;产卵场盐度的变动范围和年度之间的差异较大,波动范围为23—30.30‰。 2.对虾各年开始产卵的时间因水温不同而异,渤海湾产卵场开始产卵的时间最早为5月2日(1967、1973、1978年),最迟为5月18日(1969年)。整个产卵期持续时间较长约一个月左右。 3.对虾卵子幼体在水中并不是均匀地分布的。卵子为沉性,但却悬浮在运动的海水中,底层显著的多于表层;无节、溞状幼体的数量表层多于底层;糠虾幼体特别是仔虾的数量底层多于表层。 4.对虾选择河口附近海区产卵,但卵子一定要在盐度较高的海水中孵化变态,所见淹状、糠虾幼体分布的最低盐度为17.90‰;仔虾有溯河习性,可以上溯到离河口60余公里的地方,所见仔虾的最低盐度为0.86‰。 5.对仔虾和幼虾生活习性的研究,为制定保护对虾资源的各类网具的禁渔区和禁渔期提供了生物学依据。

 
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