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 共查询到20条相似文献,搜索用时 93 毫秒
1.
INGESTIONANDEXCRETIONOFSEVERALANTIBACTERIALDRUGSBYTHEBRINESHRIMP(ARTEMIAPARTHENOGENETICA)1.TOXICITYTOARTEMIA,INGESTIONANDEXCR...  相似文献   

2.
马面渔场与环流系统THERELATIONSHIPBETWEENNAVODONSEPTENTRIONALIS(GNTHER)FISHINGGROUNDSANDTHEWATERCIRCULATIONSYSTEM陈绵通孔兰香仝龄戴芳群(中国水产科学研究院...  相似文献   

3.
斑节对虾(Penaeus monodon)暴发性病害的病原超微结构观察   总被引:1,自引:0,他引:1  
斑节对虾(Penaeusmonodon)暴发性病害的病原超微结构观察SUPERMICROSTRUCTUREOBSERVATIONONPATHOGENOFEXPLOSIVEDISEASEOFBLACKTIGER(PEUAEUSMONODON)邓国成李焕...  相似文献   

4.
鱼用疫苗的现状及其发展趋势   总被引:27,自引:2,他引:27  
杨先乐 《水产学报》1996,20(2):159-167
鱼用疫苗的现状及其发展趋势杨先乐(长江水产研究所,荆沙市434000)陈远新(洪湖市水产技术推广站,433200)关键词鱼类,疫苗,现状,趋势THEEXISTINGSITUATIONANDTENDENCYINDEVELOPMENTOFFISHVACC...  相似文献   

5.
象山港移植放流中国对虾产卵场调查AINVESTIGATIONSONTHESPAWNINGGROUNDOFSTOCKEDPENAEUSCHINENSISINTHEXIANGSHANBAY沈新强顾新根李志诚中国水产科学研究院东海水产研究所,上海20009...  相似文献   

6.
近年来中国淡水渔具的研究成果及今后的研究方向   总被引:1,自引:0,他引:1  
近年来中国淡水渔具的研究成果及今后的研究方向ASURREYOFRESEARCHACHIEVEMENTSOFCHINAINFRESHWATERONFISHINGGEARSANDANEXPLORATIONONGUIDELINESFORFUTURERESE...  相似文献   

7.
硬骨鱼类卵母细胞最后成熟的调控   总被引:12,自引:0,他引:12       下载免费PDF全文
汪小东 《水产学报》1998,22(1):72-77
硬骨鱼类卵母细胞最后成熟的调控THEREGULATIONOFFINALOOCYTEMATURATIONINOSTEICHTHYES汪小东林浩然(中山大学生命科学学院,广州510275)WANGXiaoDong,LINHaoRan(ScholofL...  相似文献   

8.
养殖池塘溶氧平衡与日最低值预报的研究概况   总被引:12,自引:0,他引:12       下载免费PDF全文
养殖池塘溶氧平衡与日最低值预报的研究概况STUDYOUTLINGEONTHEDIELBALANCEOFDOANDTHEPREDICTIONOFTHELOWESTDIURNALDOINMARICULTUREPONDS徐宁李德尚(青岛海洋大学水产学院,2...  相似文献   

9.
养殖欧洲鳗鲡狂游病病理变化的电镜观察   总被引:3,自引:1,他引:3       下载免费PDF全文
养殖欧洲鳗鲡狂游病病理变化的电镜观察ELECTRONMICROSCOPICOBSERVATIONONPATHOLOGICCHANGESOFIRRITABLESWIMDISEASEASSOCIATEDWITHCULTUREDEUROPENEEL樊海平徐...  相似文献   

10.
丁军  蒋一珪 《水产学报》1994,18(1):69-71
银鲫卵母细胞体外诱导成熟的初步观察丁军,蒋一gui(中国科学院水生生物研究所,武汉430072)关键词银鲫,卵母细胞,成熟,体外诱导THEPRELIMINARYOBSERVATIONONINDUCINGCRUCIANCARP,CARASSIUSAUR...  相似文献   

11.
滇池非封闭围隔水体底栖动物的监测调查   总被引:1,自引:0,他引:1  
报道了昆明滇池蓝藻水华污染控制技术中,非封闭围隔水体试验区马村湾、海东湾底栖动物1年的定量、定性监测结果。调查中共采到底栖动物27科、68种;定量采样点底栖动物全年平均密度为7198.11条/m^2,生物量为60.16g/m^2;分析了本底调查与监测调查中种类的消长、分布;评价了底栖动物与其它生物及生境的关系。  相似文献   

12.
13.
分析了不同学者对河纯毒素起源的几种解释,从遗传学角度解释河纯毒素是河纯在长期进化过程中自然选择的结果的解释较为合理。本文对河豚毒素的检测方法进行了综述。河豚毒素是钠离子通道阻断剂,是一种强海洋神经毒剂,结合国内外研究现状介绍了河鲍毒素的控毒手段以及河纯毒素作为一种工具药在临床上的应用前景。  相似文献   

14.
鱼类胃肠道内分泌细胞的研究进展   总被引:6,自引:0,他引:6  
免疫组织化学技术是近年来迅速发展起来的一门新的边缘学科 ,它具有灵敏度高、特异性强、定位准确和应用广泛等优点 ,能够对胃肠道内分泌细胞进行准确地鉴别和定位[1] 。该技术的应用为鱼类胃肠道内分泌细胞的研究开辟了有效途径 ;同时对鱼类胃肠道内分泌细胞的不断研究也推动了免疫组织化学技术的进一步发展。迄今为止 ,国内外学者对鱼类胃肠道内分泌细胞的鉴别和定位已作了大量工作。1 鱼类胃肠道内分泌细胞的种类对鱼类胃肠道内分泌细胞进行鉴别和定位均使用哺乳动物的抗血清 ,迄今为止还未发现使用专门的鱼类抗血清对鱼类胃肠道内分泌…  相似文献   

15.
中华绒螯蟹颤抖病的一种病原特性初步研究   总被引:11,自引:2,他引:9  
病毒球状、无囊膜,大小为55nm左右,病毒核酸有12个基因组片段,为3/3/6型,总分子量20kb左右。推测病毒核酸为RNA,初步确定为呼肠孤病毒样病毒(Reovirus-like Virus)。实验提示该病毒对温度有较强的敏感性。  相似文献   

16.
海洋生物资源的可持续开发和利用已成为全球海洋生物资源管理的重心。预警原则作为一种新颖的环境资源管理手段,其对海洋生物资源养护的有效性已为一些国际协定和一些国家的国内立法所确认。目前我国海洋生物资源管理实践和相关法规并没有明确采用预警原则。因而,针对我国近海生物资源养护不利的现状,我国有必要增订相关立法,将预警原则规定为我国海洋生物资源管理的基本原则,并根据我国各海域的具体情况,有针对性的适用预警原则,以顺应全球海洋生物资源养护的大趋势。  相似文献   

17.
Histological observations of the gonads of Siganus argenteus showed that gametes developed toward the last quarter moon from May to July. Weekly changes in plasma steroid hormones were correlated closely with gonadal development. Human chorionic gonadotropin (hCG) stimulated in vitro production of steroid hormones at the specific lunar phase. These results suggest that the concomitant physiological events in the gonads strictly changes with the lunar cycle.  相似文献   

18.
Semen cryopreservation in the Salmonidae and in the Northern pike   总被引:1,自引:0,他引:1  
The present paper summarizes the data on a semen cryopreservation method for the Salmonidae (Oncorhynchus mykiss, Salmo trutta f. lacustris, Salvelinus fontinalis, Salvelinus alpinus, Salmo trutta f. fario, Hucho hucho, Coregonus lavaretus, Thymallus thymallus) and for the Northern pike (Esox lucius) published during recent years. It describes (1) methods used for the determination of sperm viability; (2) the protective efficiency of substances specifically for protection of internal and external parts of cells and the process of extender development; (3) the freezing, thawing and fertilization conditions; and (4) the tolerable deviations from the freezing protocol for more easy application. Finally, biomarkers are reported that predict the suitability of semen for cryopreservation and the quality of frozen–thawed semen.  相似文献   

19.
Marsupenaeus japonicus is one of the most important penaeid shrimp farmed in China. As a typical closed thelycum penaeid shrimp, the morphological changes in the spermatozoa during the journey from the testis to the female thelycum remain unclear in this species. Herein, an ultrastructural comparison of the spermatozoa in the testis (TE), vas deferens (VD), and the spermatophore in the male terminal ampoule (SA) and the female seminal receptacle (SR) of Mjaponicus was conducted. The spermatozoa in the VD, SA and SR shared typical morphological characteristics of the spermatozoa of decapod dendrobranchiates, including a spherical main body and a slender spike. However, no spike was observed in the spermatozoa collected from the TE. The spike of the spermatozoa in the SA and SR was longer than that in the VD, whereas no significant difference in spike length was observed between the spermatozoa from the SA and SR. The basic ultrastructure of the spermatozoa in the VD, SA and SR was similar, except for some differences in the nuclear region. The main body of the spermatozoa comprised the cytoplasmic band, nuclear region, several small and large vesicles, and the basal region of the acrosomal structure. The nuclear materials in the spermatozoa from the TE were more electron‐dense than those in the VD, SA and SR, while the nuclear region of the spermatozoa was more electron‐lucent in the SR than in the VD and SA. These findings preliminarily reveal the ultrastructural changes in Mjaponicus spermatozoa during the journey from the testis to the female thelycum and provided a theoretical foundation for developing effective artificial insemination methods in this species.  相似文献   

20.
大气中的有机胺具有潜在的气候效应,这是当今国际的研究热点之一。海洋是大气中有机胺的重要来源,但由于海水中有机胺检测难度较大,导致海洋环境中有机胺的产生机制尚不清楚。本文概述了海洋生物体内有机胺前体物的浓度特征及其对环境中有机胺的影响,阐述了沉积物、海水及大气中有机胺的浓度特征,分析了海洋大气气溶胶中有机胺的形成途径,并指出海水中有机胺检测的难点及现阶段亟待解决的科学问题。为深入认识海洋环境中有机胺的迁移转化规律及其潜在气候效应提供科学依据。  相似文献   

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