资源描述：
《水产养殖英语论文》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。
1、carpincaptivity(A)fostermother（1）.SexualmaturityandsexualcycleoftheYangtzeriverbasin(femalegeneral2age,maleof1yearofabovethecarpreachsexualmaturity.Generally3~5monthforthegonadsmatureandspawningperiod.AfterthefirstphaseoftheeggsⅥovariantoabsorbdegradationinJulytothefirstⅡperiod,thengraduallydevelop
2、menttoenterthefirstⅣperiodinNovember,and,onthewinterperiod,thesecondyear3~4months,meetappropriateenvironmentalconditions,ovarianitquicklymaturesoonⅣphase,thefirsttothefirstVperiod.Themalesexualmaturity(afterthefirstJingChaodegradationtoreproduceⅢperiod,8to9monthsintothefirstⅣperiod,Decembertothefir
3、stVperiod,andthisperiodwinter.Layingeggsinthedifferentseasonalloversouthlayingeggsfor2~3monthstage;TheYangtzeriverbasinasa3~4month;TheYellowRiveris4~5month;Thenortheastregionfor5~6months.Spawningperiodsustainable2monthsorsocommonly.（2）.Thechoiceofmotherandraisingfemalecarpshouldchoose2yearsold,weig
4、htmorethan1kg,themalecarpslightlysmallweightforabout0.5kilograms.Thechoiceshouldbebodyheight,motherbackthick,healthybody,strong,thefigureisgood,strongactivitywithoutinjury.Sourceofgoodforbreedinginthepond.Kissfishpondareaisgeneral1to3mu,depthofwater1.5metersorso,everyyeartoclearapond.Motherstocking
5、densitygeneral100-150kg/mu,alsocanafewsilvercarps,itcollectionfish,tocontroltheexcessivebreedingofplankton.Afterlayingeggsinwintercarphavetokissbeforemaleandfemalefedseparately,inordertoavoidsuddenhightemperaturewhennaturalreproductionandsporadiccarpspawn,usuallycanbemaleandfemaleFenYangcollectiono
6、rapond.Carpforbearsare,appetiteisbig,raisingtheperiodshallbegivenenoughfood,alsocanbeappropriatelyfertilizationmakewaterqualityfertile,naturalfeedenough.Note10~15daysbeforelayingeggswithhighqualityfeedtostrengthenthecultivation,soastofacilitatethedevelopmentofthe.(B)naturalfertilizedeggs1.Layingegg
7、s,hatchpoolchoicespawningpoolto0.5~1muisbetter,waterdepth1~1.5meters.Rappel/abseilstationsshouldbeexposedtotheshelter,less,silt,notedrainageconvenient,theenvironmentisquietpond.Putthefishfromsevento10daysbe
