助手标题  
全文文献 工具书 数字 学术定义 翻译助手 学术趋势 更多
查询帮助
意见反馈
   鲇类 的翻译结果: 查询用时:0.217秒
图标索引 在分类学科中查询
所有学科
更多类别查询

图标索引 历史查询
 

鲇类
相关语句
  相似匹配句对
     C.
     C
短句来源
     an imidazoline (B);
     B,咪唑啉
短句来源
     Karyotype analyses of Northern sheatfish(Silurus soldatovi)
     怀头的核型分析
短句来源
查询“鲇类”译词为用户自定义的双语例句

    我想查看译文中含有:的双语例句
例句
没有找到相关例句


Clarias fuscus (Lacepedae) is a fresh water catfish and has been reared in SouthChina and South Asian countries. In present paper, we deal with its morphology, re-production capacity and the change of maturity coofficient in annual cycle by analysingthe result of our experiment in 1978--1982.The content may be summarized as follows:1. According to the data from 529 fish, the relationship between body weight (W)and body length (L) may be expressed as W = 0.1922 L~(2.1365). The regression coefficientof these two...

Clarias fuscus (Lacepedae) is a fresh water catfish and has been reared in SouthChina and South Asian countries. In present paper, we deal with its morphology, re-production capacity and the change of maturity coofficient in annual cycle by analysingthe result of our experiment in 1978--1982.The content may be summarized as follows:1. According to the data from 529 fish, the relationship between body weight (W)and body length (L) may be expressed as W = 0.1922 L~(2.1365). The regression coefficientof these two varieties of Clarias fuscus from 13.5--35 cm in body length 19 different be-tween female and male. The former is 1.025 (W = 10.8696L -115.2174) and the latter,0.834(W = 9.375L-95.625). In normal conditions, the female is found to be of relativeplumpness 1 .43--1 .78, the male, 1 .23--1.41. Differences of both figures are significant.External characteristics, by comparing the diameter of eyes, interorbital space, theshape of snout, the shape of head, etc. are suffciently reliable for the identification ofboth sexes.2. The data of reproduction capacity from 86 fish, the formulas of relation be-tween body lengh (L) or body weigh (W) and average absolute breed amount (R)may be expressed as R = 0.09586L-7.3756364 and R=0.047741W-0.676548.From 179 fish, the relation between body weight (W) and average absolute spaw-ning amount (R) may be expressed as R = 39.12195W--1840.02439. The largest averagerelative breed amount of the female has a body length of about 14.5--20.5 cm, bodyweight, 53--115g. The average relative breed amount is 61.321--78.62 eggs per gramin body weight. The largest average amount has a body weight of about 108--216g. Theaverage spawning amount is 20--35 eggs per gram in body weight.3. The annual cycle of the change of maturity coefficient is 13--15% (female) or2--3% (male) in the breeding season and less than 5% (female) or 1%(male) inother seasons.

本文根据我们 1975—1982年所进行的试验,对广泛分布和养殖于我国南方各地及东南亚各国的淡水鲇类——胡子鲇的形态、生殖力和成熟系数的年周期变化作了分析研究,为进行胡子鲇的人工繁殖提供了理论依据。

The full length cDNA that encodes Siulurus meridionalis growth hormone (SmGH) was cloned from pituritary RNA with RT-PCR、3' and 5' RACE (rapid amplification of cDNA ends). The cDNA, about 1087nt long, had a coding sequence, 5'-and 3'-untranslated regions and a poly (A) chain. The cDNA could encode a prehormone of 200 amino acid (aa) including a putative signal peptide of 24aa. The primary structure of SmGH was compared with those of other 15 species growth hormones.

采用RT-PCR法和3'、5'RACE(Rapid amplification of cDNA ends)法从南方鲇脑垂体RNA克隆出生长激素(Growth hormone,GH)cDNA。此cDNA全长1087nt(含 Poly(A)》,其5'端非编码区长52nt、阅读框(Open reading frame,ORF)长603nt、3'端非编码区长415nt。其推导的GH由200个氨基酸组成,其中前24个氨基酸为信号肽部分。氨基酸序列比较表明,南方鲇GH与Pangasianodongigas、Ictaluruspunctatus和Heteropneustes fossilis三种鲇类的同源性分别为97.5%和95.0%,与鲢、鳙、草、鲤和鲫鱼的GH同源性达76.0%以上,而与人的GH(Ⅰ、Ⅱ)同源性最低为31.0%和29.5%.

In the present paper, we describe a new species Silurus duanensis sp. nov. of the genus Silurus based on 16 specimens collected from Guangxi,China. The new species differs from its congeners by having following combination characters: D. i 3, A. 55 63, maxillary barbels much surpassing backwards the base of pectoral fin, vomerine teeth patches separated into two elliptical parts, the pectoral spine wi thout clear serration on its fore margin, the posterior nostril round and open. We also revise...

In the present paper, we describe a new species Silurus duanensis sp. nov. of the genus Silurus based on 16 specimens collected from Guangxi,China. The new species differs from its congeners by having following combination characters: D. i 3, A. 55 63, maxillary barbels much surpassing backwards the base of pectoral fin, vomerine teeth patches separated into two elliptical parts, the pectoral spine wi thout clear serration on its fore margin, the posterior nostril round and open. We also revise the key to the Chinese species of the genus Silurus. Silurus duanensis sp. nov. (Figs 1 2) Holotype. No. ASIZB73176, total length 374?mm, standard length 341?mm, collected from underground rivers of Disu Town (23°34′N, 108°01′E), Du′an County, Guangxi, where belongs to the Hongshui River of the Pear River Basin, in May 1996. Paratypes. Nos. ASIZB73172 73, 73175, total length 215 361?mm, standard length 176 319?mm, the collection data is as the holotype; ASIZB73174, total length 302?mm, standard length 278?mm, collected in May 2001 in the same collection site as the holotype; ASIZB73317 18, total length 82 85?mm, standard length 72 76?mm, collected in May 2001 in the same collection site as the holotype; ASIZB73319 27,total length 100 123?mm, standard length 86 108?mm, collected in June 2001 in the same collection site as the holotype. All the type specimens are kept in the Fish Collection of the Institute of Zoology, Chinese Academy of Sciences, Beijing. D. i 3; P. i 11 14; V. i 8 12; A. ii 55 63. gill rakers 10 12, vertebrae 4+56 57. Depth of body 5 6 (5 3 6 0), length of head 4 5 (4 3 4 7), length of predorsal 3 1 (3 0 3 2) in standard length. Length of snout 2 6 (2 5 3 0), diameter of eye 10 5 (8 7 12 8), interorbital length 1 7 (1 5 2 0), width of head 1 2 (1 1 1 3) in head length. Depth of caudal peduncle 3 3 (2 9 3 6) in depth of body. The new species differs clear from S. gilberti and S. cochinchinensis but similar to the other species of the genus distributed in China by having longer lower jaw than upper jaw. And the new species can be separated from the other species by the following comparison. 1) The new species shares the common character in having 3 branched dorsal fin rays with S. microdorsalis, but later was only found in Yalu River basin in Northern China and the two species are also very different in appearance. 2) The mouth split of the new species only reaches backwards to the position under the fore margin of the eyes and the length of the two labels of the caudal fin is almost equal, which differs from S. meridionalis and S. soldatovi (mouth split reaching backwards to the position under the middle point of eyes or more back and length of upper label of caudal fin longer than lower label). 3) The new species differs from S. asotus but similar to S. mento, S. grahami and S. lanzhouensis in having the two separated elliptical patches of vomerine teeth (vs continuous vomerine teeth patches in S. asotus ) and without clear serration on fore margin of pectoral fins (vs clear serration in S. asotus). 4) The new species differs from S. lanzhouensis in having less branched anal fin rays and vertebrata (55 63 and 56 57 vs 77 86 and 63 66, respectively); differs from S. mento in having maxillary barbels much surpassing backwards base of pectoral fin (vs at most reaching base of pectoral fin in S. mento ); differs from S. grahami in having invisible teeth patch of the lower jaw when the mouth closed (vs visible teeth patch of the lower jaw when the mouth closed in S. grahami ) (Table 1).

根据采自广西都安县的 1 6尾鲇类标本鉴定描记了鲇属鱼类 1新种 ,即都安鲇Silurusduanensissp .nov .。新种具有下颌突出于上颌 ,背鳍条i 3,臀鳍条数较少 ;颌须长 ;犁骨齿带分成两片 ;胸鳍硬刺前缘有颗粒状突起 ,后缘有明显的锯齿 ;后鼻孔呈短管状 ,且呈圆形张开等综合特征。上述性状可区别于属内其他已知种类

 
图标索引 相关查询

 


 
CNKI小工具
在英文学术搜索中查有关鲇类的内容
在知识搜索中查有关鲇类的内容
在数字搜索中查有关鲇类的内容
在概念知识元中查有关鲇类的内容
在学术趋势中查有关鲇类的内容
 
 

CNKI主页设CNKI翻译助手为主页 | 收藏CNKI翻译助手 | 广告服务 | 英文学术搜索
版权图标  2008 CNKI-中国知网
京ICP证040431号 互联网出版许可证 新出网证(京)字008号
北京市公安局海淀分局 备案号:110 1081725
版权图标 2008中国知网(cnki) 中国学术期刊(光盘版)电子杂志社