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《溫度、鹽度、pH和體質(zhì)量對(duì)尼羅羅非魚(yú)幼魚(yú)窒息點(diǎn)的影響.pdf》由會(huì)員上傳分享,免費(fèi)在線閱讀,更多相關(guān)內(nèi)容在行業(yè)資料-天天文庫(kù)。
1、第31卷第3期廣東海洋大學(xué)學(xué)報(bào)V01.31No.32011年6月JournalofGuangdongOceanUniversityJun.2011溫度、鹽度、pH和體質(zhì)量對(duì)尼羅羅非魚(yú)幼魚(yú)窒息點(diǎn)的影響王輝1,強(qiáng)俊1,李瑞偉2(1.廣東海洋大學(xué)水產(chǎn)學(xué)院,廣東湛江524025;2.廣東茂名茂南三高羅非魚(yú)良種基地,廣東茂名525024)摘要:利用實(shí)驗(yàn)生態(tài)學(xué)的方法研究不同溫度(15、20、25、30和35℃)、鹽度(0、5、10、15和20)、pH(5、6、7、8和9)和體質(zhì)量(1.93-I-0.08、3.43±o.12、7.95±0.34、11.
2、74±O.41和15.84±0.61g)對(duì)尼羅羅非魚(yú)幼魚(yú)窒息點(diǎn)的影響,并建立溫度、鹽度、pH、體質(zhì)量與羅非魚(yú)窒息點(diǎn)間的回歸方程。結(jié)果表明:溫度t、鹽度s、pH和體質(zhì)量m對(duì)尼羅羅非魚(yú)幼魚(yú)窒息點(diǎn)有顯著影響(P<0.05o當(dāng)溫度、鹽度、pH和體質(zhì)量分別為25.28℃、3.6、8.06、6.3g時(shí),窒息點(diǎn)(眈,)最低,回歸方程為協(xié),=0.0009r20.0455f+0.7266(詹=0.9521),眈,=一0.0001S3+0.0042S2—0.0239S+0.1119(幫=0.9228),Dnr=0.0093pH2—0.1499pH+0.717
3、4(露=0.9768);Dnr=一0.0003m3+0.01l1m2一o.1043m+0.3628(膏=0.9484o在溶氧不足情況下,溫度25.28℃、鹽度3.6、pH8.06的環(huán)境條件有助于提高幼魚(yú)耐低氧能力。關(guān)鍵詞:尼羅羅非魚(yú);幼魚(yú);窒息點(diǎn);溫度;鹽度;pH;體質(zhì)量中圖分類號(hào):$965.125文獻(xiàn)標(biāo)志碼:A文章編號(hào):1673—9159(2011)03—0037—06EffectsofTemperature,Salinity,pHandBodyWeightonAsphyxiationPointofJuvenileNileTilapia
4、(Oreochromisniloticus)WANGHuil,QIANGJunl,LIRui.wei2(1.FisheriesCollege,GuangdongOceanUniversity,Zhanjiang524025,China;2.GuangdongMaomingSangaoTilapiaBreedingFarm,Maoming525024,China)Abstract:Theeffectsoftemperature(15,20,25,30and35℃),salinity(0,5,10,15and20),pH(5,6,7,8and
5、9)andbodyweight(1.93±0.08,3.43±0.12,7.95±0.34,11.74±0.41and15.84±0.61g)onNiletilapiajuvenileexposedtohypoxicstresswerestudiedbymeansoftheexperimentalecologymethodinlaboratory.Regressionmodelsfortheeffectsoftemperature,salinity,pHandbodyweightonasphyxiationpoint(DxP)werede
6、rivedfromthedata.Theresultsshowedthatthesefactorshadsignificanteffectsonasphyxiationpoint(P<0.05).Theasphyxiationpointarrivedattheminimumwhentemperature(D,salinity($,pHandbodyweight(m)wererespectively25.28℃,3.6,8.06and6.3g.Theregressionequationbetweenasphyxiationpointandt
7、hefactorsabovementionedwasasfollows:DAP=0.0009t2—0.0455t+0.7266,∥=0.9521:DAr=一0.0001S’+0.0042S2—0.0239S+0.1119,群=0.9228:DAP=0.0093pH2—0.1499pH+0.7174。群=0.9768:DAP=一0.0003m’+0.01llm2—0.1043m+0.3628,∥=0.9484.TheseresultsindicatedthatiuvenileNiletilapiaculturedatdesirablecon
8、ditionsasderivedinthepresentstudyfortheincreaseoftheabilitytowithstandhypoxia.Itissuggestedthatw