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描述采于云南省的金线属 鱼类一新种──犀角金线鲃(Sinocyclocheilusrhinocerous,sp.nov)以头上长有一长角、眼小、侧线完全、体表裸露无鳞等区别于该属所有已知种。 相似文献
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NUMERICAL SIMULATION AND DYNAMIC STUDY OF THE WINTERTIME CIRCULATION OF THE BOHAI SEA 总被引:10,自引:2,他引:8
INTRODUCTIONTheBohaiSea,analmost closedshallowsea,liesnorthwesttotheYellowSea.Fig.1ashowsthege ometryoftheshorelineandthewaterdepthdistributionoftheBohaiSea,whichissmallandshallowcom paredwiththeYellowSeaortheEastChinaSea.Themeandepthislessthan 2 0meters.Be… 相似文献
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INTRODUCTIONJiaozhouBayisashallowsemi closedbaywithtotalareaofabout 40 0km2 andaveragewaterdepthof7m .Themaximumwaterdepthisover 5 0matthecenterofthestraitconnectingtotheYellowSea.Thisstraitcenterwateriscalledbaymouthwater,thewaterinthenorthernpartofthestrai… 相似文献
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INTRODUCTIONTheJapaneseseabass (LateolabraxjaponicusC&V)distributeswidelyinthecoastalwatersalongtheBohaiSea ,YellowSea ,EastChinaSea,andSouthChinaSea .Asacarnivorousfish ,itoccupiesthehightrophiclevelinthemarineecosystemandhasadaptedtovariousenvironmentalr… 相似文献
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INTRODUCTIONTheBohaiSeawaschosenasthesiteofthefirstphaseoftheChina GLOBEC (GlobalOceanEcosystemDynamics)programfrom 1 997to2 0 0 0 ,inwhichthedynamicsofzooplanktonpopulationswasoneofthefourprincipalfoci.Smallcopepodscompriseanimportantcomponentofzooplanktonesp… 相似文献
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描记采于云南省玉溪地区的金线属二新种,以形态特征和采集地县名分别命名为长鳍金线SinocyclocheiluslongifinusLi,sp.nov和华宁金线SincyclocheilushuaningensisLi,sp.nov。前者头的后部不隆起,体表裸露,胸鳍长,后伸达腹鳍起点等特征区别云南省的其他金线;后者外形与大头金线相近,但侧线鳞较少(59~60),前躯裸露或被稀疏细鳞,口须较长等可区别,两者遗传距离为1.7%,也已达到种级差异。模式标本保存于云南省路南县黑龙潭水库和云南大学生物系。 相似文献
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INTRODUCTIONTheSouthChinaSea (SCS)isasemi enclosedoceanbasinlocatedataspecialgeographicpo sition ,oneoftheworld’spronouncedmonsoonregions,withnortheastwindsprevailinginwinterandsouthwestwindsinsummer,andisacrucialregionofintensiveair seainteractionofgreat… 相似文献
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CAPABILITIES OF MULTIMEDIA GIS 总被引:2,自引:0,他引:2
ThephraseMultimediaGIS(MMGIS)isacombinationoftwotermsmultimediaandGIS.Thetermmultimedia(MM)isdefinedas“Amultimediasystemisc... 相似文献
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TheBohaibaybasin ,locatedineastrenChina ,isconsideredasabigCenozoiccontinentalriftbasin .Thebasinpossessesdeeperfault -trouth ,goodconsistencyandhugeperspectiveforpetroleumandnaturalgasex ploitationinPalaeogeneandpre -Palaeogenesystems .Thestudyontectonicch… 相似文献
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INTRODUCTIONTheSouthChinaSea(SCS)isapartly enclosedoceanbasinoverlaidbyapronouncedmonsoonsurfacewind .Paststudies (Chenetal.,1 991 ;DingandMurakami,1 994 ;Yan ,1 997;LiangBiqi,1 991 ;LiangJianyin ,1 991 )indicatethatahugewarmwaterpooljointlycontributedbythewesternPacific ,ea… 相似文献
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本文研究了我国长江北岸湖北省武汉市新洲县阳逻镇北部晚第三纪的三种裸子植物化石木。它们是水松GlyptostrobuspensilisK.Koch,武汉柏本CupressuswuhanensisJ.JYangsp.nov.和武汉刺柏JuniperuswuhanensisJ.J.Yangsp.nov,这些化石本的发现,给研究我国裸子植物提供了良好的依据.此外,对1990年发表于《林业科学》(26卷4期)上的湖北柏木和河南松化石木也给了拉丁种名,它们分别是CupressushubeisnsisJ.J.Yangspnov.和pinushenanensisJ.J.Yangsp.nov. 相似文献
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Lydia Dümenil 《中国海洋湖沼学报》2000,18(2):117-125
INTRODUCTIONTheAsiansummermonsoonsystemincludestheIndian(orSouthAsian)andEastAsiansummermonsoons,bothofwhichformthemostdramaticmonsoonsystemsintheNorthernHemisphere.TheintensityofthelatterappearstoberelatedtotherainfallineasternChina.Therewillbeanempty… 相似文献
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INTRODUCTIONAccumulatedevidencessuggestedaclosecorrelationbetweenneoplasticdiseaseofaquaticor ganismsandtheincreasingreleaseofgenotoxinsbyanthropogenicactivitiesintoaquaticenvironment(Mix ,1 986;Gardneretal.,1 991 ;GESAMP ,1 991 ) .Ithas,therefore,becomenecessarytoe… 相似文献
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通过对新泰市汶南镇朝阳村至庄家庄一线北侧一套含煤地层的观察和化石采集,共采到植物化石20余件,经鉴定有Sphenophylumoblongifolium(Germ.etKaulf)Ung.,Neu-ropterisovataHufm.,N.plicataSternb.,N.cf.plicataSternb.,N.sp.,Pecopteriscf.candol-leanaBrongn.,CordaitesschenkiHale,SamaropsissinensisHale5属8种。该植物组合属我国早期华夏植物群〔1〕,时代为晚石炭世。含该植物组合的地层应为太原组,证明新泰蒙阴盆地无坊子组。 相似文献
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1 INTRODUCTIONTheterm“anastomosingriver”wasfirstappliedbySCHUMM ( 1968) ,referredtostable ,lowbed load ,multiplechannelsystemwithlow gradient,highsinuosityandseparatedvegetatedislands .Thisspecificmeaningon“anastomosis”whichwasfirstusedbyJacksonin 1834endedthesy… 相似文献
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1 INTRODUCTIONSincethe1980saseriesofresearchplanincludingIGBP(theInternationalGeosphere.BiosphereProgramme)havebeensetup,ofthem,PAGES(thePastGlobalchanges)isanimportantcoreproject.Thenaturerecordsofoceandeposit,terrestrial(loess,lakesandswamp)deposi… 相似文献
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INTRODUCTIONBillard ( 1 986)studiedthespermatozoonultrastructuresinteleostsandfounddistinctdifferencesa mongdifferentspecies.Studyonspermatozoonmorphologyandfunctionisachallengebecauseofthesperm’sspecialenvironment (Gageetal.,1 998;WangandZhang,1 999) .Sinceleft ey… 相似文献
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根据Olney及其同事[1]以及更早的Lucas、Newhouse和其他研究者的工作,Olney在70年代提出了兴奋性毒性(excitotoxin)的原始概念及兴奋性毒性这一专门术语。这些工作认为过量的兴奋性氨基酸(excitatoryaminoacid,EAA)─—谷氨酸(glutamicacid,GLU)、GLU的类似物门冬氨酸(asparticacid,ASP)等─—能过度兴奋中枢神经系统(centralnervoussystem,CNS)内的GLU敏感神经元而达到使它们致死的程度。在过去… 相似文献
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INTRODUCTIONThemajorspeciesofgrouper,Epinephelussp.beingmariculturedisveryhighlypricedandpopularinChinaandSoutheastAsia,butuptonow ,ascommercialfeedisstillnotavailableinthegroupermar icultureindustry,theyhavetobefedwithfrozentrashfishasmaindiet,soitishar… 相似文献