1、華中農(nóng)業(yè)大學(xué)碩士學(xué)位論文牛山湖魚(yú)類年齡結(jié)構(gòu)及群落多樣性的研究姓名：馮廣朋申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：漁業(yè)資源指導(dǎo)教師：謝從新李鐘杰20030501馮廣朋：牛山湖魚(yú)類年齡結(jié)構(gòu)及群落多樣性的研究StudiesonAgeStructureandDiversityofFishCommunityintheNiushanLakeAbstractAgestructureanddiversityoffishcommunityintheNiushanLake

2、werestudiedAninvestigationwastakenonthestatusoffisheryresourceinordertooptimizefishcommunitystructureandprotectfisheryresourceScaleswereusedforagedeterminationandamodifiedseinewasusedforcollectingsamplestostudydiversityo

3、ffishcommunityMainresul峰wereasfollows1Atotalof35specieswerecollected，whichcouldbeclassifiedinto11families，23speciesbelongingtoCyprinidae，2speciestoSerranidaeand2speciestoEleotridae，andonlyonespeciestoeachoftheremaining8f

4、amiliesItisshowedthatFishspeciesdiversityhaddecreasedinrecentdecades2Thesmallfishes。includingCcrHrd|s，CerythropterusH1eucisculus，Pparva，rswinhonisandHswinhonis，wereabundantinthecatch，尸parvaandZswinhonishadonlyoneageclass

5、ThepopulationofArivularisandsni∥ipinnishadtwoageclassesandmostofthemwereoneyearoldTheagestructuresofCauralus，schuatsiCalburnusandCerythroptet‘1t5“weremainlyconsistedof1～3ageclasses。CauralusCalburnusandCerythropterusgrews

6、lowlyintheNiushanLake3ThegrowthofCalburnusandCetythropteruswerestudiedThegrowthequationswereasfollows：Calburnus：L嚴(yán)11144[1e0“”軸仲’]阱=129200[1e刈“53“枷5盯們]2的02Cerythropterus：厶=2960[1一e0““o“’]鵬=3936[1me_0扎““舶’]3㈣4Seinewasoneof

7、thebestsamplemethodsforstudyingfishcommunityAtotalof19species，including7877individuals，werecollectedintheNiushanLakeCerythropterus，＆nigripinnisArivularis，Pparva，111eucisculus，7=swinhonisandHswinhonisbwereabundantAgestruc

8、turesoffishesweremainly1ageclassintheseinePparva，ZswinhoniscerythropterusandAcheilognathmae，including兄ocellatusRlightiandPimberbiswerethenumericallydominantspecies5Fishcommunitycompositionwasdifferentamongthesamplingarea

9、sofNiushanLakeSmallfishes，mainlyAcheilognathinaewerethemostabundantinthecentreareaTheotherareasweremainlyCerythropterusandrswinhonis6MacrophyteplayedimportantroleinthedistributionoffishcommunityBiomassoffishesinthemacrop