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     According to the morphological feature and biochemical characteristics of the isolates,strain BH-001,BH-005,BH009 and BH-011Y62001 belong to Edwardsiella ictaluri,strain BH-002,BH-015,BH-017 and BH-019belong to Aeromonas hydrophila.
     根据对菌株的形态和生化特性的测定结果,11个菌株中的BH-001、BH-005、BH-009和BH-011等4个菌株属于叉尾鮰爱德华菌(Edwardsiella ictaluri),而BH-002、BH-015、BH-017和BH-019等4个菌株属于嗜水气单胞菌(Aeromonas hydrophila)。
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     Analysis showed that the minimum requirement of Na 2SeO 3, selenium methionine and selenium yeast in diet were 0.28, 0.09 and 0.11 mg/kg respectively; as for the activity of GSH-Px, the said requirement should be 0.17, 0.12 and 0.12 mg/kg respectively.
     拐点分析表明 :叉尾对日粮中Na2 SeO3 、蛋氨酸硒和酵母硒的最小需求量分别为 0 .2 8,0 .0 9和 0 .11mg/kg ,而对于谷胱甘肽过氧化物酶的活性则要求分别为 0 .17,0 .12和 0 .12mg/kg日粮。
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     The results showed that the numbers of the red blood cell is 2.16×106/mm3 and the white blood cell is 6 900/ mm3 in fresh blood; the crude protein is 15.76%,the crude fat is 8.66%,the moisture is 74.56%. The microelectronics:Fe is 1.76 mg/kg and the Zn is 0.366 mg/kg in muscle;
     结果表明,斑点叉尾鮰的红细胞数为2.16×106个/mm3,白细胞数为6 900个/mm3 ,鲜肉中粗蛋白含量为15.76%,粗脂肪含量为8.66%,水分含量为74.56%,微量元素中铁为1.76 mg/kg,锌为0.366 mg/kg,鲜样中赖氨酸、蛋氨酸、精氨酸比为1.89?
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     The total content of 4 kinds of fresh taste amino acids was 7.4 g/100 g,among which glutamate,aspartate,glycine,alanine was 3.2 g/100 g,1.9 g/100 g,0.9 g/100 g,1.4 g/100 g separately, higher than that of Ictalurus punctatus,Silurus asotus,Pelteobagrus fulvidraco and Clarias lazera.
     4种鲜味氨基酸的含量为 :谷氨酸 3.2 g/1 0 0g、天冬氨酸 1 .9g/1 0 0 g、甘氨酸0 .9g/1 0 0 g、丙氨酸 1 .4g/1 0 0 g ,合计 7.4g/1 0 0 g ,高于河鲶、斑点叉尾、革胡子鲶和黄颡鱼。
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     Non-Polluted Farming Technique of Ictalurus punctatus(Rafinesque)
     美国斑点叉尾鮰Ictalurus punctatus(Rafines-que)无公害(Non-polluted)养殖技术
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     Channel Catfish (Ictalurus Punctatus) Genome Research
     斑点鮰基因组的研究
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     Experiment on Culture of Ictalurus Punctatus
     斑点鮰养殖试验
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     KNIFE & FORK
     刀与
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     Wag the Dog
     《摇狗》
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     Jiang, sp. nov., C.
     ,日本锦带花孢C.
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  forktail
Lunar cycle in the reproductive activity in the forktail rabbitfish
      
Habitat degradation led to local extinction of the San Francisco forktail damselfly (Ischnura gemina) in Glen Canyon Park, San Francisco, California.
      


For some time the existence of Oncomelania-like snails in some localities of Yunnan Province has been a puzzle to epidemiologists because they haibour schistosome-like cercariae and yet human schistosomiasis is not always present, A careful study of the inner and outer morphology of the snails revealed that they are members of Tricula, a genus of 'Amnicolidae to which also belongs Oncomelania. The species discovered from Lunan county is identified as Tricula humida (Heude) Annandale, 1924 while the one from...

For some time the existence of Oncomelania-like snails in some localities of Yunnan Province has been a puzzle to epidemiologists because they haibour schistosome-like cercariae and yet human schistosomiasis is not always present, A careful study of the inner and outer morphology of the snails revealed that they are members of Tricula, a genus of 'Amnicolidae to which also belongs Oncomelania. The species discovered from Lunan county is identified as Tricula humida (Heude) Annandale, 1924 while the one from Tengchong as Tricula gregoriana Annandale, 1924. The third species found in Yi-liang offers some peculiarities not heretofore described, so fof the time being it is termed as Tricula sp. Besides the original descriptions of both T. humida (Heude, 1890) and T. gregoriana (Annandale, 1924), the features are noted as shown in the figures 2-7. In making comparisons of the morphological characteristics, it has been found that the above men: tioned Tricula snails differ from one another with respect to the shape or structure of such organs as verge, gill-lamella, operculum and radula, and that each species of Tricula in question can easily be distinguished from Oncomelania snails by the following characteristics: (1) the verge is more slender; (2) no narrowly-longitudinal fold presents beneath the neck when the animal is stretched out; (3) each eye is without projecting, being situated at the exterior base of the tentacle. But its "false eyebrow", formed by yellowish granules above each eye, resembles in appearance to that of Oncomelania snails, though this is not a dependable criterion for identifying the genus of either Tricula or Oncomelania.Key is given to distinguish between Tricula, Oncomelania and other genera. Three plates showing die shell characters of Tricula are presented.The furcocercariae found from these Tricula snails were identified by K. Wu (unpublished data) by animal experimentation to be cercariae of a new species of Schistosoma not related to human beings.

1.采自云南省曾被混淆为钉螺(Oncomelania)的三种拟钉螺(Tricula): (1)泥泞拟钉螺Tricula humida[Heude]Annandale,1924。标本采自路南团山。在云南省尚属初见,现已在8个县市找到,其中有一个市也找到钉螺。 (2)仅在腾冲县找到的标本为格氏拟钉螺Tricula gregoriana Annandale,1924。亦属初次发现。 (3)系新见的一种Tricula sp.,暂不定名。标本采自宜良县。已找到同样标本的计有9个县市;其中两个县市也找到钉螺,一个县找到泥泞拟钉螺,以及另一个市同时发现钉螺和泥泞拟钉螺。 2.三种拟钉螺的形态特征,区别最显著的是鳃的结构和雄螺阴茎的形状,均为以往文献所未纪载。拟钉螺异于钉螺的是眼不凸出,颈下无狭仄纵襞,阴茎细小和脐成沟裂状或闭合。而眼后黄色颗粒形成的“假眉”,乃是两者共有的特征,不足为识别的根据。 3.检索表包括钉螺和拟钉螺以及易与两者混淆的其他吸虫的螺类中间宿主。提供识别的参考。 4.三种拟钉螺均有双叉尾蚴寄生,经吴光氏鉴定和当地卫生机构调查研究,证明都不是日本血吸虫尾蚴。因此,拟钉螺不必列入灭螺措施范围以内。

Sanguinicolid trematodes are of economic importance since they cause wide spread havoc in fish farms. Epizootics of different species of this group of parasites have been recorded in different parts of the world(Leger 1930; Erickson and Wallace 1959; Wales 1958; Schell 1974). According to J. W. Smith up to 1972 there have been described about 50 species of sanguinicolids belonging to 12 genera and parasitising 91 species of fish-hosts of which 40 are fresh water forms and 51 are marine.The parasites are, however,...

Sanguinicolid trematodes are of economic importance since they cause wide spread havoc in fish farms. Epizootics of different species of this group of parasites have been recorded in different parts of the world(Leger 1930; Erickson and Wallace 1959; Wales 1958; Schell 1974). According to J. W. Smith up to 1972 there have been described about 50 species of sanguinicolids belonging to 12 genera and parasitising 91 species of fish-hosts of which 40 are fresh water forms and 51 are marine.The parasites are, however, very little known in China. There have been only two species reported. They are Sanguinicola magnus Hu, Long and Li, from the ide, Ctenopharyngodon idellus in Tai-Hu, Kiangsu and S. Shantsuensis Lung and Shen from Carassius auratus in Canton.During 1965 a species of Sanguinicola was found from the liver and gill blood-vessels of Carassius auratus collected from ponds in the southern outskirts of Foochow. Subsequently the biology of this parasite was studied and it was connected with epizooties occurring in fish-hatcheries in South Fukien. We were aware of the outbreak in Jou-Wei People's commune in Lung-Hai district, where 300,000 fingerlings of Lien-yue(Hypophthalmichthys molitrix and Aristichthys nobilis)were succumed to the disease. Nine years later in 1974 another outbreak again occurred in Hai-Cheng in another fish-hatchery where 400,000 fingarlings of pond fishes died from the massive invasion of the gills by the parasite. Several of the infected fish with swollen and protruded anus were sent to our laboratory. They were dissected with sanguinicolid worms recovered fromt heir branchial arteries. They were found to be identical with worms found formerly from Carassius auratus in Foochow. Our detailed morphological studies indicated that they belong to a species of Sanginicola not hitherto recorded in science. The name Sanguinicola lungensis sp. nov. is proposed. The type is described as follows:Body flate, spindle-shaped. Length 0.268-0.844 mm, width 0.142-0.244mm. Both lateral margins of body armed with spines, which bear curved eads Anterior proboscis without spines. Hind portion of body from genital pores posteriorward with spines gradually diminished, In addition to characteristic armature, cuticle of body inserted with fine setae, which can only be observed on high magnifcation. Mouth opening subterminal, ventral and median in position. Oesophagus slender, 0.178-0.265 mm in length, enlarges slightly anterior to nerve commissure. Caeca very short, four in number. Testis with 8-15 pairs of bilateral lobes. Entire testes 0.111-0.200mm in length, 0.089-0.142 mm in width. Testical lobes transversely elongated, extending to lateral nerve trunks. Vas deferens centrally situated, extending to behind ovary forming two deep curvatures to open in male genital pore. Male genital pore sinistral in position. Ovary butterfly-shaped, placed behind testis. Oviduct arising from posterior aspect of ovary, turning sirtistrally making double loops and then turning to the right, descending posteriorward to level of genital pore to meet with the vitelline duct, Ootype semi-circular in form containing only one egg. Female genital pore situated in front of male. Egg triangular type bearing a short and blunt spine. Length of egg 0.055-0.060 mm, width of egg 0.025-0.030 mm.Host: Hypophtalmichthys molitrix(Cuv. and Val.)Aristichthys nobilis(Richardson)Carassius auratus(Linn.)Habitat: Branchial artery, blood vessels in liver.Locality: Foochow and Lung-Hai district, Fukien.The discovery of Sanguinicola lungensis adds a new member to the group of sanguinicolids which parasitise cyprinid fishes. Ejrmont(1926)diffirentiated S. armara, S. inermis and S. intermedia by the presence or absence of spines and setae on the lateral margins of body. From these three species S. lungensis can be readily distinguished. From S. inermis it differs by the presence of spines. From S. armata it differs by the presence of setae and in the number of intestinal ceca. From S. intermedia it differs by the shape of its egg bearing very short and blunt spine

1.从福建省福州南台岛、龙海县角美和海澄采得一种血居属吸虫,寄生在鲢鱼、鳙鱼及鲫鱼的鳃弓血管、动脉球、肝脏血管。详细的形态考察并与已知种比较得知本种吸虫系未经科学报告的种类拟定名为龙江血居新种,Sanguinicola lungensis sp. nov。 2.血居吸虫是养殖业的大害,本省龙海县角美公社鱼苗养殖场于1965年曾因本种吸虫病暴发,致使300,000条鲢鱼苗死亡。1974年夏间在海澄县的养殖埸又有400,000条鲢鱼苗因本虫的侵袭而死亡。已在我国发现的血居吸虫有:无棘血居、有棘血居、大血居和山村血居等种均对淡水鱼有很大的危害性。 3.龙江血居的生活史。中间宿主为褶叠椎实螺(Lymnaea plicatula Benson)。详细观察了毛蚴,子胞蚴、尾蚴各期的构造。对本种叉尾有鳍尾蚴做感染金鱼的试验,35天后从其鳃弓血管及动脉球解剖出成熟虫体,其构造与自然感染的虫体一样。这样就确定了幼虫期和成虫的关系。 4.观察本血居吸虫的成虫和幼虫期,叙述了一些消化系统及排泄系统的原始特征,讨论了血居科、旋睪科及裂体科的系统发生。 5.本文提供了有关血居属(Sanguinicola Plchn 190...

1.从福建省福州南台岛、龙海县角美和海澄采得一种血居属吸虫,寄生在鲢鱼、鳙鱼及鲫鱼的鳃弓血管、动脉球、肝脏血管。详细的形态考察并与已知种比较得知本种吸虫系未经科学报告的种类拟定名为龙江血居新种,Sanguinicola lungensis sp. nov。 2.血居吸虫是养殖业的大害,本省龙海县角美公社鱼苗养殖场于1965年曾因本种吸虫病暴发,致使300,000条鲢鱼苗死亡。1974年夏间在海澄县的养殖埸又有400,000条鲢鱼苗因本虫的侵袭而死亡。已在我国发现的血居吸虫有:无棘血居、有棘血居、大血居和山村血居等种均对淡水鱼有很大的危害性。 3.龙江血居的生活史。中间宿主为褶叠椎实螺(Lymnaea plicatula Benson)。详细观察了毛蚴,子胞蚴、尾蚴各期的构造。对本种叉尾有鳍尾蚴做感染金鱼的试验,35天后从其鳃弓血管及动脉球解剖出成熟虫体,其构造与自然感染的虫体一样。这样就确定了幼虫期和成虫的关系。 4.观察本血居吸虫的成虫和幼虫期,叙述了一些消化系统及排泄系统的原始特征,讨论了血居科、旋睪科及裂体科的系统发生。 5.本文提供了有关血居属(Sanguinicola Plchn 1905)的分类检索表,系依据Erickson和Wallace(1959)之表加以修订。以便国内科学工作者进一步探索此类吸虫。 6.考察了龙江血居在宿主体内的寄生位置及致?

Chinese fishes of the family siluridae,includes 12 species which can be grouped into 3 genera,namely,Silurus L.,Kryptopterus Blkr.and Wallago Blkr.Onespecies—Silurus lanzhouensis,sp.nov.and one subspecies S.soldatovi meridionalis subsp.nov.have 2 pair of barbels,the former inhabiting the Yellow River,and the latterlioing in the larger rivers of south China.By comparison of the cranialstructure,especially the shape of the supra-ethmoid of most species of the genusSilurus,3 groups can be distinguished,each group...

Chinese fishes of the family siluridae,includes 12 species which can be grouped into 3 genera,namely,Silurus L.,Kryptopterus Blkr.and Wallago Blkr.Onespecies—Silurus lanzhouensis,sp.nov.and one subspecies S.soldatovi meridionalis subsp.nov.have 2 pair of barbels,the former inhabiting the Yellow River,and the latterlioing in the larger rivers of south China.By comparison of the cranialstructure,especially the shape of the supra-ethmoid of most species of the genusSilurus,3 groups can be distinguished,each group includes both species with 2 pairsof barbels and species with 3 pairs.This fact indicates that though the number ofbarbels may serve as a specific criterion,it does not suffice to be a generic one.Theauthor thus shares the opinions of certain previous ichthyologist that the genus Par-asilurus should be regarded as a synonym of Silurus.In this country,the most commonsiluroid fish is Silurus asotus,but in some drainage systems there co-exists a closelyallied 4-barbeled species which is apt to b mistaken for the former.Recent investigation shows that the presence of rather strong serration on the anterior margin of the pectoral spine in both sexes is the essential feature of S.asotus.Trying to locate the type specimen of Linné for a checkup,the author has been informed by the curators of two Swedish museums that the type specimen of S.asotus seems to have been lost.Accordingly the author has assigned the ten specimens collected from the Heilung KiangRiver (designated as the Amur River by foreign authors) as neotype,preserved in themuseum of the Institute of Hydrobiology,Wu-Han,Hupei Province.The origin andgeographic distribution of the Siluridae is also discussed.

本总述包括3个属(鲶属、缺鳍鲶属和叉尾鲶属),共计12个种。其中1个种是新种,命名为兰州鲶(Silurus lanzhouensis,sp.nov.),采于黄河水系;另1个是南方大口鲶新亚种(Silurussoldatovi meridionalis,subsp.nov.),生活在长江及长江以南大的江河中。两种成体均具有2对口须。通过鲶属大多数种的头骨的比较,发现鲶属有3个类型,主要是以上筛骨的形状来区别。在这3个类型中各有2对和3对口须的种,因此作者认为以口须的多少作为属的特征是不够的,本文仍按以往有些学者的观点,将4须鲶属作为鲶属的异名。在我国各处最普通的种是鲶鱼,但时常在若干水系中也出现具4根口须的很相近似的种,互相混淆。鲶鱼必须依据什么特征来识别,是长期没有解决的问题。作者根据各方面的记述,提出无论雌雄其胸鳍刺外缘均具有显著的锯齿,才是鲶鱼的主要特征。我们曾函询瑞典的两个博物馆,据回信:“看来,保藏在瑞典的林奈的鲶鱼模式标本已经遗失了。”因而作者指定把我国黑龙江水系所产的10尾鲶鱼标本作为新的模式标本,存放于水生生物研究所鱼类标本室。本文还讨论了鲶科鱼类的起源与地理分布问题。

 
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