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ID:36630397
大小:1.55 MB
页数:54页
时间:2019-05-13
《摄食水平及投喂频率对瓦氏黄颡鱼幼鱼生长的影响》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、上海水产大学硕士论文摄食水平及投喂频率对瓦氏黄颡鱼幼鱼生长的影响摘要瓦氏黄颡鱼是一种具有较高经济价值的能科鱼类。随着人工繁殖技术的突破,苗种已基本解决,并已开始进行大面积养殖。该鱼具有很强的抗逆性,适合集约化大规模养殖。但在集约化养殖中,不同温度条件下瓦氏黄颡鱼幼鱼最佳的投喂频率和摄食水平未有报道。为得出集约化养殖条件下瓦氏黄颡鱼幼鱼最佳的投喂模式,本研究在实验生态控温、过滤净化循环水养殖系统内模拟瓦氏黄颡鱼幼鱼集约化养殖,对不同投喂频率、三个温度下不同摄食水平与瓦氏黄颡鱼幼鱼生长、蛋白酶、生化成分及能量收支等的关系进行了研究。1.摄食水平与瓦氏黄颡鱼幼鱼生长和能量收支的关
2、系。实验在20℃、25℃和30*(2水温条件下分别设5个不同的摄食水平(食物占初始体重百分比):0.5%、1%、2%、3%和饱食。每天投喂2次,饲养实验21d。研究表明:在3个不同温度条件下,瓦氏黄颡鱼幼鱼的湿重特定生长率(SGRw)、干重特定生长率(SG磁)和能量特定生长率(SGRe)都随摄食水平的提高而显著升高(PO.05);在3个温度条件下,瓦氏黄颡鱼幼鱼的湿重转化效率(CEw)、干物质转化效率(CEd)及能量转化效率(凹H,)随摄食水平增加而显著提高(P3、在生长能占摄入能最高时,瓦氏黄颡鱼幼鱼的能量收支方程为:l上海水产大学硕士论文EffectoffeedingfrequencyandrationlevelonthegrowthoffingerlingDarkbarbelcatfish(Pelteobagrusvacheii)AbstractDarkbarbelcatfish,Pelteobagrusvacheii,belongstoBagridaeofSilufformes,whichisfamousforitsdeliciousness,highvalueofnutrientandrapidgrowth.Afterthe4、breakthroughofbreeding,itisnothardtogetfingerlingPelteobagrusvachelli,what’smore,alargescaleofcultureisontheway.Thefishhasgoodresistanceandisfittointensiveculture.Butithasn’tbeenreportedabouttheeffectoffeedingfrequencyandrationlevelatdifferenttemperaturebythewayofintensiveculture.Sotherese5、archaimstofindasuitablefeedingpatternforintensivelyculture.Theresearchwerecarriedoutinaculturesystemwhichtemperaturecanbecontrolledandcirculatedwatercanbefdtrated,tofindouttherelationshipbetweenfeedingfrequency,rationlevelandgrowthoffingerlingPelteobagrusvacheii.Thefirstpartshowstheeffecto6、frationlevelongrowth,energybudgetoffingerlingPelteobagrusvachellLAt20"C,25℃and30"C,thefishwerefedcommercialdrypelletsatfiverationicvelsfromO.5%(theratiooffishweighttofoodweighOtosatiationwith2mealsdailyfor21days。弧eresultshowsthatwetweight,dryweight,energyspecialgrowthrateandconversioneffic7、ienciessignificantlyincreasewiththegrowingm上海水产大学硕士论文rationlevelatdifferenttemperature(P<0.05).At25。C,theabsorptionefficiencyindrymatterandenergyincreasedsignificantlywiththegrowingrationlevel,theratioofgrowthenergytofoodenergyoffishfedtobesatiatedishighesttha
3、在生长能占摄入能最高时,瓦氏黄颡鱼幼鱼的能量收支方程为:l上海水产大学硕士论文EffectoffeedingfrequencyandrationlevelonthegrowthoffingerlingDarkbarbelcatfish(Pelteobagrusvacheii)AbstractDarkbarbelcatfish,Pelteobagrusvacheii,belongstoBagridaeofSilufformes,whichisfamousforitsdeliciousness,highvalueofnutrientandrapidgrowth.Afterthe
4、breakthroughofbreeding,itisnothardtogetfingerlingPelteobagrusvachelli,what’smore,alargescaleofcultureisontheway.Thefishhasgoodresistanceandisfittointensiveculture.Butithasn’tbeenreportedabouttheeffectoffeedingfrequencyandrationlevelatdifferenttemperaturebythewayofintensiveculture.Sotherese
5、archaimstofindasuitablefeedingpatternforintensivelyculture.Theresearchwerecarriedoutinaculturesystemwhichtemperaturecanbecontrolledandcirculatedwatercanbefdtrated,tofindouttherelationshipbetweenfeedingfrequency,rationlevelandgrowthoffingerlingPelteobagrusvacheii.Thefirstpartshowstheeffecto
6、frationlevelongrowth,energybudgetoffingerlingPelteobagrusvachellLAt20"C,25℃and30"C,thefishwerefedcommercialdrypelletsatfiverationicvelsfromO.5%(theratiooffishweighttofoodweighOtosatiationwith2mealsdailyfor21days。弧eresultshowsthatwetweight,dryweight,energyspecialgrowthrateandconversioneffic
7、ienciessignificantlyincreasewiththegrowingm上海水产大学硕士论文rationlevelatdifferenttemperature(P<0.05).At25。C,theabsorptionefficiencyindrymatterandenergyincreasedsignificantlywiththegrowingrationlevel,theratioofgrowthenergytofoodenergyoffishfedtobesatiatedishighesttha
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