Comparison of the Respiratory Metabolism of Juvenile Litopenaeus vannamei Cultured in Seawater and Freshwater-中国Betway体育网页登陆

摘要 Litopenaeusvannamei,aeuryhalinespecies,canbeculturedatawiderangeofsalinities.Theemergenceoffreshwaterpond-cultureofL.vannameiisanimportantpreludetothecontinueddevelopmentofshrimpcultureinChina.Inthisstudy,wecomparedtherespiratorymetabolismofjuvenileL.vannameiculturedinfreshwaterandsaltwaterbymeasuringtheiroxygenconsumptionrate(OCR),ammonium-typenitrogenexcretionrate(AER)andpyruvatekinase(PK)andlactatedehydrogenase(LDH)activitiesatdifferentmoltingstagesinordertophysiecologicallycharacterizejuvenileL.vannameiunderfreshwaterconditions.TheresultsshowedthatOCRwassignificantlyhigherinsaltwaterthaninfreshwateratallstagesofmoltingcycle.However,variationofOCRamongmoltingstagesinsaltwaterwassimilarwiththatinfreshwater,andthehighestOCRwasobservedatpost-moltingstage.Atallstagesofmoltingcycle,AERwassignificantlyhigherinfreshwaterthaninsaltwater,andthehighestwasobservedatpost-moltingstage.TheactivityofPKwassignificantlyhigherinsaltwaterthaninfreshwater.Conversely,theactivityofLDHwashigherinfreshwaterthaninsaltwateringeneral.SignificantvariationofPKandLDHactivitiesinmoltingcyclewasobservedinsaltwaterandfreshwater.TheresultsindicatedthataerobicmetabolismofjuvenileL.vannameiwasmoreactiveinsaltwaterthaninfreshwater;whileitsproteinmetabolismwasmoreactiveinfreshwaterthaninsaltwater.

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Comparison of the Respiratory Metabolism of Juvenile Litopenaeus vannamei Cultured in Seawater and Freshwater

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