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Digestive Enzyme System of Larvae of Different Freshwater Teleosts and Its Differentiation during the Initial Phase of Exogenous Feeding
digestive system larvae freshwater fish digestive enzymes histology
2018/3/5
Activities of digestive enzymes and main histological characteristics of the intestine were investigated in larvae
of three salmonid species (Coregonus maraena, C. atterensis, Thymallus thymallus), o...
魁蚶4个地理群体ITS序列变异及系统发生分析
魁蚶 地理群体 ITS-1 ITS-2 遗传变异
2015/6/2
为充分了解我国魁蚶种质资源状况,准确定位魁蚶的养殖育种模式,本研究采用聚合酶链式反应(PCR)对采自山东蓬莱(PL)、山东黄岛(HD)、江苏前三岛(QSD)及韩国统营(KTY)4个地理群体魁蚶样本的核糖体RNA两个内转录间隔区域(ITS-1和ITS-2)进行扩增,经测序比对后分别获得长度为468bp和541bp(包含引物、插入/缺失位点)的序列。序列比对结果表明, ITS区序列变异相对较高,但4个...
为了了解海南沼虾遗传方面的信息,本文利用ITS-1分子标记技术对珠江海南沼虾群体作了研究。研究结果表明:①其ITS-1片段在1700bp~1800bp之间,较日本沼虾短;②其碱基含量变化范围为:27%~30%(A)、27%~31%(G)、14~16%(C)、43%~46%( G+ C);③在海南沼虾ITS-1序列中,包含着非常丰富的SSR序列信息,具体为(AG)n、(GA)n、(AGT)n、(AG...
中华豆蟹与太平大眼蟹ITS区比较研究
中华豆蟹 太平大眼蟹 ITS序列
2009/6/10
[目的]为蟹类的分子进化研究积累资料。[方法]采用酚-氯仿抽提法从中华豆蟹和太平大眼蟹的肌肉组织中提取总基因组
DNA,对其ITS基因片段进行PCR 扩增和测序,同时对其序列同源性、碱基组成和变异情况进行初步研究。[结果]中华豆蟹与太平大
眼蟹ITS序列片段分别为739和769 bp,存在明显长度差异。中华豆蟹的AT 含量和GC 含量分别为49%和51%,而太平大眼蟹分别
为40.79%和...
对我国五大淡水湖: 鄱阳湖、洞庭湖、太湖、巢湖、洪泽湖, 鄱阳湖内包括进贤、余干、珠湖、都昌、湖口、永修, 合计10 个群体三角帆蚌78 个个体核糖体DNA 基因转录间隔子ITS-1 进行PCR 扩增、序列测定, 获得78 条长度为430 bp 的同源序列. 同源基因序列分析显示, 五大淡水湖10 个群体三角帆蚌78 条ITS-1 序列片段, G+C 的含量都明显高于A+T 的含量. 鄱阳湖三角帆...
Restoration of a river backwater and its influence on fish assemblage
rehabilitation monitoring colonisation floodplain Morava River assemblage development adult fish 0+ fish freshwater
2015/6/1
The development of fish assemblage in a restored river backwater (Kurfürst backwater, Morava River, Czech Republic) was monitored over a six-year period from its restoration. The structure of fish a...
Mercury content in the muscle of fish from the Elbe River and its tributaries
Vltava River Abramis brama L. Perca fluviatilis L. Leuciscus cephalus L
2015/6/1
The main aim of the present study was to assess the mercury contamination of the Elbe River and its tributary the Vltava River. Mercury concentrations in fresh fish muscles were used for the contamina...