The main causes of distributing situation , which might be partly because of the habit of this fish , are water pollution and overfishing 造成这种分布状况的原因除黑龙江鲂本身的生活习性外，主要由以下两方面的原因：水质污染，酷捕滥捞。
Crayfish , silverfish , catfish , octopus eel , anchovy , red shrimp , leather jacket , john dony , mahi mahi , monkfish , red gurnard , vannamei shrimp , todarades pacificus , loligo chinensis 淡水小龙虾、银鱼、鲴鱼、章鱼、欧鳗、鱼、红虾、马面鱼、鳅鱼、海鲂鱼、安康鱼、红娘鱼、南美对虾、日本真鱿、中国红鱿鱼。
The resources of megalobrama skolkovii dybowsky now , the fish lives in the part of hei he to xun ke , tong jiang to fu yuan of hei long jiang river , xiaomuhe of wusuli river , daxingkai lake 黑龙江鲂资源现状目前黑龙江鲂仅分布于黑龙江黑河至逊克江段；黑龙江同江至抚远江段和乌苏里江的小木河以下江段；大兴凯湖。
The wintering area of spawning population in the middle of wusuli river may be in the part from tongjiang to qindeli ; the wintering group in the part of wusuli river hulin county might be the premature group 在乌苏里江中游产卵的群体的越冬场可能在黑龙江的同江至勤得利江段，而在乌苏里江虎林境内越冬的黑龙江鲂可能是未成熟个体。
2 . the biological study of megalobrama skolkovii dybowsky the study on outer appearance has some differences with nikerlski ( 1960 ) , wuxianwen ( 1964 ) , zhangjuemin ( 1995 ) , which is total length / total width , total length / head length , head length / mouth length 黑龙江鲂生物学研究本研究黑龙江鲂的外部可量性状与尼科尔斯基( 1960 ) 、伍献文( 1964 ) 、张觉民( 1995 )等的研究结果存在一定的差异。
There might be many wintering habitats along heilongjiang river for the fish , which can spends winter period in the part of river and lake comfortable for it , but different groups in the different wintering habitats have their migration routes and areas 黑龙江鲂在黑龙江流域的越冬场分布可能有多处，只要是适合其越冬条件的江段或湖区都可作为其越冬场，而在不同越冬场越冬的群体，都有其固定的洄游区域和路线。
The first one has a brief introduction to birth and development of credit card , defines the concept of credit card , discusses legal characters and functions of credit card , and most importantly makes clear the legal relations between the parties of credit card transactions 诙?诖幽诤?屯庋臃治鲂庞每?概念,指出本文所称信用卡专指银行信用卡,认为信用卡在法律性质上属于一种消费信贷,具有转帐结算、存取现金和消费贷款等功能。
The reasons of small resource are 1st , the fish eggs is lack of sticky and most spawning ground is not comfortable for spawning ; 2nd , the fish matures about 5 years old and fecundity is in low level on absolute or relative eggs amount ; 3rd , the shape is easier for catching with tall width and thin body 黑龙江鲂资源量少的原因为：黑龙江鲂为产弱黏性卵的鱼类，对产卵场的要求较高。黑龙江鲂的性成熟年龄较大( 5龄) ，而且无论是绝对怀卵量还是相对怀卵量都较低，因此生殖力较低。黑龙江鲂由于体形高而侧扁，极易被捕捞。
The purpose of this subject deals with the biological characters of megalobrama skolkovii dybowsky according to the results of convey of nature resource in heilongjiang waters , capture and transportation of brood fish , outer appearance , study of countable and measurable characters and all inner system , analysis of muscle composition , study of chromosome , and discuss the classification status , and also carried out the artificial fertilization 本课题通过对黑龙江鲂进行资源调查、亲鱼采捕和运输、外部形态、外部可数及可量性状和内部各系统的研究、肌肉成分的分析、染色体的研究等实验，重点研究黑龙江鲂的生物学特性，并对黑龙江鲂的分类地位进行了探讨，同时对黑龙江鲂进行了人工繁殖。
Phylogenetic relationship of the sinibrama species was reconstructed using the cladistic method and morphological characters . c . monglicus monglicus , a . lini , p . pekinensis and m . terminalis were selected as out - group . and a total of 34 morphological characters were found variable among four valid species 用分支系统学方法，重建华鳊属鱼类的系统发育关系，运用外类群比较法，选择蒙古? 、大眼近红? 、鳊和三角鲂为外类群，对34个形态学性状进行了简约性分析。
