查询词典 cyprinids

The RAPD results illustrate that the phylogenetic relationship betweenBothriocephalid tapeworm parasitic in Grass carpCtenopharyngodon idellus(C.et V.and Common carp(Cyprinus carpio L.)from different regions ofChina is infraspecific with noticeable variance bwtween them.Thephylogenetic trees based on the 3 sequences analyses above are constructed,which show the following relationships:Bothriocephalid tapeworms fromGrass carp,Common carp and Luciobrama are found to be monophyletic,and are very close to Bothriocephalus opsariichthydis,but are divergent toanother monophyletic group comprising Bothriocephalid tapeworms fromZacco,Hemiculter and Leuciscus.On the basis of phylogenetic reconstruction,autapomorphic species conceptis used in species delimitation suitablefor determining four species in the present study:B.acheilognathi,B.opsariichthydis,and two other bothriocephalids parasitic respectively inHemiculter and Leuciscus.It is also deduced that the differentiation time ofBothriocephalid tapeworms parasitic in cyprinids is earlier than that of theirhosts,and the most recent specification happened about one million yearsago.Key words Bothriocephalid tapeworm Molecular Systematics

具体成果有：通过RAPD分析探明了我国不同地理分布的草、鲤鱼头槽绦虫的亲缘关系属于种下水平，并存在较高变异；通过基因合并分析重建头槽绦虫的系统发育关系，表明草鱼、鲤鱼及鯮鱼头槽绦虫是单系群，它们与马口鱼头槽绦虫亲缘关系较近，而与〓条、宽鳍鱲及雅罗鱼头槽绦虫构成的另一单系群亲缘关系较远；在此基础上，提出符合头槽绦虫种的界定的独征物种概念，据此确定鲤科鱼类寄生头槽绦虫的四个种：鱊头槽绦虫，马口鱼头槽绦虫，以及另两种分别寄生于〓条和雅罗鱼的头槽绦虫：根据上述研究推断鲤科鱼类寄生头槽绦虫的分化年代早于其宿主，最近的一次物种形成距今约一百万年左右。

The result of this study shows that percentage of catching weight from the original dominant species of larger cyprinids, Sinibrama macrops, Carassius cuvieri six years ago, were lower than that prior to 2000 obviously and Culter erythropterus and Oreochromis sp. have replaced Carassius cuvieri to become the new dominant species in Feitsui Reservoir.

研究结果显示，六年前仍存在的中大型优势鱼种高身鲫及黑鲢的捕获重量百分已明显降低，而红鳍鮊与杂交吴郭鱼有取代高身鲫成为水库内优势鱼种的趋势。

Both of the two genes had high homology among the cyprinids.

三种鱼的两种基因与其他鲤科鱼类同源性较高。

It was indicated that Gnrh2 gene had high homology among the cyprinids.

三种鱼Gnrh2氨基酸序列与其他鲤科鱼类有较高的同源性。

In North America, the name is applied to various small cyprinids found in creeks and bog s, mostly in the central and southern U.S.

在北美，「dace」一词用于多种鲤科小鱼，主要产于美国中部和南部的溪流和沼泽。

In North America, the name is applied to various small cyprinids found in creeks and bogs, mostly in the central and southern U.S.

在北美，「dace」一词用于多种鲤科小鱼，主要产于美国中部和南部的溪流和沼泽。

The age and species of various Chinese freshwater Cyprinids, different types of water bodies, short ter...

水温与鱼血清谷草转氨酶活性有相关性。

For refrigerated carp Cyprinids carpio L.

对于冷藏的鲤鱼Cyprinids carpio L。

Both morphological and molecular systematics approaches are used toinfer phylogenetic relationships and species delimitation amongBothriocephalid tapeworms parasitic in cyprinids in China.

本论文对我国鲤科鱼类寄生假叶目头槽绦虫从形态学、分子系统学等不同方面进行了亲缘关系及种的界定等的研究。

The results indicate that the cyprinids form a monophyletic group while the non-cyprinid cypriniforms form another one,which is in accordance with the hypothesis proposed by Siebert.

鲤科鱼类包含3个主要的分支，即鱼丹系、鲤系和雅罗鱼系；但在非鲤科鲤形目鱼类中，其关系不能得到很好的解决，其中鳅科是复系，平鳍鳅科、条鳅亚科和花鳅亚科可能有较近的亲缘关系。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。