Abstract:The enibryQ cell strain (CP-8Q) grass carp (Cteraoa yregodon2deTus) has been cultured on a large scale by using microcarrier suspension cul-Lure. After being cultured with microcarriers for 6 days, the cell density can reachto about 8 .4 x 10², which is 41 times，as the initial inoculativecentration (2 x 10⁵scells/ml). Afterwards, the haemorrhagic virus of grass carp isinoculated into the bioreactor while the cells have just been full on xnacrocarriers.The titer of virus can be increased to 8 .0 LgTOID₅₀0.1mI in 5 days incubation,which is 4.25 logarithm values a.s high as the initial virulrnca.

Abstract:Selective technique of good breed er strain in Cypr carpio hoe-matoterus and C. carp was carried from 1986 to 1990. In heilongjlong commonearp,the interstrain selection was used. The parents were collected from lower Song-hua River，middle Nenjiang River and inghai Lake, and self-reproduction wasdone separately. Samples were observed randonly fromF，，the comparison of gro-wth of 1,2 and 3 year old was done in same pond or in different pond，instantane-otxs growth rate(IGRW )and relative growth rate(GW )were determined. The morpho-fogy and iso2ymes were studied too and ebvious differences of morphological andbiochemical genetics were found in three wild common carp strains,and the growthof Songhua River wild common carp is aver 10faster than the two others. So that anew strain was screened out. In mirror carp, the interstrain crossing and sequentselection were used. The crossing was done by the scattered mirror carp (selected30 years at Songpu Test Farm of our Institute) and the pure line mirror carp (in-troduced from West Germany in 1984).The comparison of growth hybrid Fl andits parents of 3 different ages was done in same pond or in different pond, andIGRw，GW,morphology,and isozymes were determined. The results are as follows:morphological character of Fl is in the middle of those of parents，mean heterozy-gosity of F₁, is zero, and growth of F₁, is over 20% faster than average of parents.

Abstract:In this paper the changes of Total Soluble Nitrogen (TSN) in 5%TCA extracts，Falin Phenol Positive Suhstnce，Free Amino Nitrogen (FAAN)，pH value and VolatilB Basic Nitrogen (VEN) ware studied for the quality ofoyster (Ostrea pZicateZa) stored under different temperatures. Moreover,the pepti-des in hot water extract were separated, and the molecular weights of them weremeasured The experimental results showed thet TSN values in 5%TCA solutionand Fnlin-Phenol positive substance increased initially，then decreased afterwards.The relative nontent of peptides with molecular weit ranging from 1000-3000MW increased as the storage period at 0℃ or 30℃ was prolonged. The pH value de-seended whereas the Y.BN content ascended with the prolongation of the storagetime. By using Arrhenius plat's principle, the change of VEN content was furtherstudied, showing that there was an inflection point an the plot at the temperatureof 22℃ .

Abstract:The amount of bacteria in fish pond was plenty and changeable.The sequence of the total amount of bacteria was summer,autumn,spring and win-tar. In water, the organo raphs were more ixi summer, while in bottom-mud theywere more in autumn. The amount of erganotrophs and the total amount of bacteria,were correlated positively to the chemical oxygen demand (CCD). The fatal amountof bacteria showed a positive correlation to water temperature, but the organotro-phs were not. The total amonut of bacteria and organotrophs were not correlated tothe plankton biomass, but the total amount of bacteria were correlated to the zoo-planlton biomass. The suitahle pH range for growth is 6.4-9.4. The power of thecommon fisheries medicines reducing the amount of bacteria wars in order of bleeding powder>CuSo,FeSo,mixture>dipteregx

Abstract:In this paper the effects of salinity on the rata for embryonic de-velopment of oyster OsErea tcad2enw3xaneasis Cxosse3 and on the growth of the veli-ger are reported At the temperature of 21.2and the salinity of 31，26,the time ofthe embryarxic development from fertilised egg to straight hinge larvae is nineteenhours and thirty minutes. The effective salinity range of the embryonic developmentof the oyster is 17-39% and the optixrum salinity range is 22--34%,x. Within thesalinitp range of 22-36%，the rate of the embryonic development is faster, andthe mean time of the embryonic development is no more than twenty hours. The developmen willb delayeden saliniy 900ztime of the embryonic development vQill be delayed when salinity goes beyond thebounds of the optimum range. Within the salinity range of 25.21-34.25%,the rateof growth of the veliger is faster，the daily growth of the larvae is 8.54-9.38 umand the veioeity of the survival of the veliger is higher (the mean percentage isabove 50%). When salinity goes beyond the hounds of the optimum range, therate of the growth and. the survival of the larvae will be lower.

Abstract:This paper reports the results of an experiment on the nutritional requirements of five essential amino acids (EAAs) of blunt snout bream. Thaoptimal rnge(gkg feed) of the five EAAs are recommended as follows:Arginine20.9--20.8; Leucine 24.2-21.7;Histidine 6.4-6.2，hysine 18.60-19.80; Tso-lecine 14.6-14.7

Abstract:The results of some aspects of the reproductive biology of MystusnaacSa-oterus f Bleeker )，based on 928 specimens from the Jiz Ling River during theperiod of May I9$fi to December 1987，are aummaried in this paper. Results ofthis study provide strong evidence that the ovaries，based an both external and hi-stolagical features, are divided into sex maturation stages. The spawning season of.the fish starts from May to July. The female is confirmed to spawn once in spaw-ping seasVn. After spawning, the ovaries of the fish remain at the stage III andpass through the whole winter. Spermatids are commonly found in the testes of theoverwintering males. Accumulion and consumption of fat is greatly related to thedevlopnient of gonads. Sex ratio is. 0.93:1，a little in favor of male. Age-and-sizefirst, maturities of male anal femsle are 2 and 3 years old with.body length ofL4.5em and 1T .8cm respectively. .4-and 5-year old fish account For the 50% of thespawning population.

Abstract:本文报道了镜泊湖细鳞斜颌鲴的年龄生长特点。以鳞片上的年轮作为年龄鉴定依据。渔获物中1⁺龄和2⁺龄个体占52%以上,体长以14～26厘米为主。体长与鳞长之间呈直线相关L=0.1116+47.8754R。体重与体长呈指数函数相关 W=0.014L^3.0。3⁺ 龄以前生长较快,生长指标高,体长和体重的相对增长率大,以后转入成鱼生长阶段,其生长规律适合 von Bertalaffy 方程:L_t=38.5[1-e^{(-0.328（t+0.446）}];W_t=893.6[1-e^{(-0.328（t+0.446）}]³体重生长曲线的拐点位于 2.93龄的 W_t=0.32W_∞处,为成熟拐点。建议捕捞 3龄以上个体,并作为养殖对象加以发展。

Abstract:太湖新银鱼(Neosalanx taihuensis Chen)和寡齿新银鱼(N.oligodontis Chen)广泛分布于我国东部平原地区湖泊,为重要经济鱼类。目前,有关银鱼种群生态与生长特性、生物学特性、生殖发育及移植引种等方面的研究报道较多,但对银鱼鱼休营养成分及营养价值方面的研究尚未见报道。本文是对这两种银鱼肌肉及寡齿新银鱼整体的水解氨基酸和游离氨基酸进行测定,并初步比较分析的结果。

Abstract:真鲷(Pagrosomus major T and S)是广东及其他各省市沿海海水网箱养殖的主要鱼类之一。随着真鲷人工繁殖和苗种培育的成功,真鲷养殖业将会有一个更大的发展。夫于鱼类的窒息点与耗氧率的研究早有不少,但是对真鲷除个别学者提及其窒息点外,真正对其窒息点与耗氧率的系统研究尚未见到。为了绘其鲷的人工繁殖、苗种培育、运输和成鱼养殖提供呼吸生理方面的理论依据,笔者于1990年春对真鲷的窒息点和耗氧率进行了初步测定,就不同规格大小的苗种及备种外界条件与窒息点和耗氧率之间的关系进行了初步探讨。

Abstract:为了改良普通鲫鱼的经济性状,提高其生产性能,我们从1986年开始进行以鲫(Carassius auratuauratus)为母本,白鲫(Carassius auratus cuvieri)为父本的杂交试验,获得了具有明显生长优势的高邮杂交鲫。鱼种阶段比父本白鲫生长快30%以上,成鱼阶段快20%以上,且具有肉质好和抗逆性强等优点。试验期间,高邮杂交鲫已在扬州市的九个县(市)推广夏花鱼种,初步取得成效。本文对高邮杂交鲫及其亲本的消化道的外部形态和组织构造作详细叙述。关于硬骨鱼类消化道形态解剖和组织构造,国内外曾对之有过不少报导。对鲫鱼消化道构造的观察,目前只有一例,但它并未结合该鱼的食性进行分析研究。而对白鲫消化道的组织构造亦来见过报导。作者结合食性分析对高邮杂交鲫及其亲本消化道的形态和组织构造进行了观察,试图为高邮杂交鲫进一步推广养殖提供饲养管理的科学依据。

Abstract:近年来,中国对虾的人工放流已在东海区见到显著成效,各种形式的对虾养殖方式也在不断地探索与研究,对虾的养殖种类除中国对虾外,还有长毛对虾、斑节对虾、墨吉对虾、新对虾等。笔者近两年在浙江沿海的三门湾从事潜堤网拦养殖中国对虾试验期间发现,从三门湾湾口的张网渔业及一些河口的扳缯网渔业的渔获物看刀额新对虾(Metapenaeus ensis)在东海有一定数量。

Abstract:生长率和饵料转换效率是水产养殖中两个重要的经济指标。鱼类养殖研究的主要目的之一就是用尽可能低的成本获得尽可能多的鱼产品。通过促进鱼类生长(缩短养殖周期)和提高饵料转换效率(降低饵料成本)的途径可以达此目的。而在这两个方面,内分泌学起着重要的作用。现代研究表明,鱼类的生长发育是受体内各种内分泌激素调节控制,鱼类生长的快慢与体内激素水平的高低密切相关。