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咸淡水鱼类
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  “咸淡水鱼类”译为未确定词的双语例句
     the brackish water species 32 in number, about 30.19%;
     咸淡水鱼类32种,占30.19%;
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  相似匹配句对
     Study on Nutrients in Sea Water Fish and Fresh Water Fish
     鱼类淡水鱼类营养物质研究
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     the brackish water species 32 in number, about 30.19%;
     淡水鱼类32种,占30.19%;
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     AN INTRODUCTION TO 《THE FRESHWATER FISHES OF TAIWAN》
     《台湾的淡水鱼类》简介
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     Monopterus albus Zuiew is a important freshwater fish in our country.
     黄鳝是我国重要的淡水鱼类
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     Dynamic Interface between Fresh Water and Salt Water
     淡水界面动态变化的研究
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  brackish water fishes
The juvenile stages and the mature males and females ofPharodes banyulensis parasitize the gill cavity of small brackish water fishes namelyBlennius pavo.
      
Species of the genusAscarophis van Beneden (Nematoda: Cystidicolidae) are known as parasites of marine and brackish water fishes, whereas generally only larval forms have been reported from crustaceans.
      
Currently, within the FishBase Consortium, it is responsible for all data on African freshand brackish water fishes.
      


The Changjiang (Yangtze) River Estuary in Shanghai Region is covered an areaabout 2,750 thousand mu and lengthened a little over than 100 kilometers. It is famousfor abundance on fisheries resources and is the most important fishing ground of theestuarine fishery in China.As a result of the past few years' investigation, the fishes of the area, as knownat present, are represented by 106 species. According to the ecological features of thespecies, they may be referred to four types, viz. the freshwater, the brackish...

The Changjiang (Yangtze) River Estuary in Shanghai Region is covered an areaabout 2,750 thousand mu and lengthened a little over than 100 kilometers. It is famousfor abundance on fisheries resources and is the most important fishing ground of theestuarine fishery in China.As a result of the past few years' investigation, the fishes of the area, as knownat present, are represented by 106 species. According to the ecological features of thespecies, they may be referred to four types, viz. the freshwater, the brackish water,the marine and the diadromous. The freshwater species are 24 in number, about 22.64%of the total;the brackish water species 32 in number, about 30.19%;the marine species44 in number, about 41.51%;the diadromous species, including the anadro mousand the catadromous, 6 in number, about 5.66%. Acute-nosed anchovy Coilia mystus(Linnaeus ), long--tailed anchovy Coilia ectenes Jordan et Seale and ice fish Hemisalanxprognathus Regan are the major commercial species. Besides these, gray mulletMugil cephalus (Linnaeus), red--eyed mullet Liza haematochila (T. et S.), Japanesesea perch Lateolabrax japonicus (C. et V.), long-nosed catfish Leiocassis longirostrisGunther, Chinese paddle-fich Psephurus gladius (Martens), sturgeon Acipenserdabryanus (Dumeril), hilsa herring Macrura reevesii (Richardson ) head-spinedcroacker Colichthys lucidus (Richardson), Japanese eel Anguilla japonica T. et S.,striped puffer Fugu xanthopterus (T. et S.), dusky puffer Fugu obscurus (Abe) and sting ray Dasyatis navarrae (Steindachner), etc are with more commercial signifi-cance.There are a little more than 20 apecies of shrimps and crabs in the same area,among them, Palaemon (Exopalaemon) annandalei(Kremp) and Eriocheir sinensisH. Milne--Edwards are the major species and with most commercial value. As regard tofish fry and megalopa larva of commercial crab, it is noticed that elvers of Anguillajaponica T. et S. and the megalopses of Eriocheir sinensis H. Milne--Edwards areabundant and of commercial importance for inland water stocking.In recent 24 years since 1959 to 1982, the average annual catch of the aquaticanimals mentioned above is 4, 587.68 tons, 4,047.2 tons in 1960s, 5, 089. 9 in 1970s.The highest catch is 7,483 tons in 1971, the lowest catch is 2,921.5 tons in 1962. It isworried that the annual catch of both 1981 and 1982 is less than 4,000 tons. The annualcatch of commercial crustaceans is inereased, but that of all major fisheries fall down.It is obviously caused by the influence of water conservency works, water pollution,and the fish recources damaged by overfishing.The annual catch dynamics of the major commercial aquatic animals are introdu-uced and analysed in the present paper. In addition, some problems concerned to theprotection and propagation of the fisheries resources of the Changjiang Estuary areherewith discussed.

上海市所辖长江口区,长约100余公里,面积约275万亩。1959年—1982年的年平均渔获量为 4587.68吨;1962年产量最低,仅2921.5吨,1971年最高,达7483吨。产鱼类106种,其中淡水鱼类有24种,占总种数22.64%;咸淡水鱼类32种,占30.19%;海水鱼类44种,占41.51%;海淡水洄游鱼类6种,占5.66%。经济鱼类以凤鲚、刀鲚和前颌间银鱼为主,此外还有鲻鱼、梭鱼、鲈鱼、鲥鱼、长吻鮠、白鲟、达氏鲟、棘头梅童鱼、鳗鲡、魟类和东方鲀等,共约20种。虾蟹类以安氏长臂虾和中华绒螯蟹最具经济价值。苗种资源开发以鳗苗和蟹苗为主。本文对主要经济水产品渔获量的年际变化作了分析和介绍,并就河口渔业的资源保护和增殖问题进行了讨论。

Distributions of Cu,Pb,Zn,Cd,Cr and Ni in tissues of the commercial fish taken from the northern part South China Sea were studieThe relations between heavy metal concentrations in fish and its living habits,living environment have been analyzed. Levels of heavy metals in fish have been evaluated as well. There were significant differences of heavy metal levels in different parts of tissues;levels of heavy metals in muscle tissue being lowest.The Cd concentration of carnivorous fish was much higher than that...

Distributions of Cu,Pb,Zn,Cd,Cr and Ni in tissues of the commercial fish taken from the northern part South China Sea were studieThe relations between heavy metal concentrations in fish and its living habits,living environment have been analyzed. Levels of heavy metals in fish have been evaluated as well. There were significant differences of heavy metal levels in different parts of tissues;levels of heavy metals in muscle tissue being lowest.The Cd concentration of carnivorous fish was much higher than that of the other taxa. Heavy metal levels of demersal fishes were higher than those of other fishes. There was no significant difference in heavy metal concentrations between fish living in estuary area and those fishes living in off shore area. Commercial fish in the northern part South China Sea have not been affected significantly by heavy metals and their eating value has not been affected yet.

研究了南海北部海域经济鱼类的重金属Cu、Pb、Zn、Cd、Cr和Ni等的含量与分布。结果表明,重金属在鱼体不同器官组织中的分布是不均衡的,肌肉中的重金属含量最低;底层鱼类的重金属含量相对较高;肉食性鱼类的Cd含量较高,但其余5种金属含量与鱼类食性的关系不明显;近海鱼类的重金属含量与河口咸淡水鱼类的重金属含量之间无显著差异;经济鱼类受重金属污染的影响不明显,其食用价值尚未受影响。

The concentrations of Cu,Pb,Zn,Cd,Cr and Ni in commercial fishes,shrimps,crabs,cephalopods and bivalve molluscs collected from the northern area of the South China Sea were determined.The results show that the contents of the heavy metals in various lives are quitedifferent.The distribution of the heavy metals in various organs of the fishes and shrimps are not proportionate,The contents of the heavy metals in the fishes have a relation with the habitat lay-er. The contents of the heavy metals in the fishes...

The concentrations of Cu,Pb,Zn,Cd,Cr and Ni in commercial fishes,shrimps,crabs,cephalopods and bivalve molluscs collected from the northern area of the South China Sea were determined.The results show that the contents of the heavy metals in various lives are quitedifferent.The distribution of the heavy metals in various organs of the fishes and shrimps are not proportionate,The contents of the heavy metals in the fishes have a relation with the habitat lay-er. The contents of the heavy metals in the fishes of various feeding habits are not markedly dif-ferent,except the higher content of Cd in the carnivorous fish.The contents of the heavy metalsin the fisheds between inshore and estuary are not obviously different.The seasonal changes ofthe content of the heavv metals in the fishes are not distinct.The economic swim-species have notbeen obviously polluted by the heavy metals,it is basically in good state. No significant effect hasbeen found on the edible value.

调查研究了南海北部海域鱼类、虾类、蟹类、头足类和双壳类等5大类经济水产品中的Cu、Pb、Zn、Cd、Cr和Ni。研究结果表明,各类生物的重金属含量差异显著,重金属在鱼虾不同器官组织中的分布是不均衡的。鱼类的重金属含量与其栖息水层有关;除肉食性鱼类的Cd含量较高外,不同食性鱼类重金属含量间的差异不显著;近海鱼类的重金属含量与河口咸淡水鱼类的重金属含量之间无显著差异;鱼类重金属含量的季节变化不明显。游泳性经济种类受重金属污染影响不显著,基本上处于良好状态,其食用价值尚未受到这些重金属的明显影响。

 
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