饥饿对二倍体和三倍体长牡蛎呼吸和排泄的影响  

Effects of starvation on respiration and excretion of diploid and triploid oysters Crassostrea gigas

作　　者：王芳[1] 王昭萍[1] 董少帅[1] 吕宝强[1] 

机构地区：[1]中国海洋大学水产学院,国家教委海水养殖重点实验室,山东青岛266003

出　　处：《海洋科学》2004年第10期52-55,共4页Marine Sciences

基　　金：国家自然科学基金项目(39900111)

摘　　要：采用室内实验的方法研究了饥饿对二倍体 (2n)和三倍体(3n)长牡蛎(Crassostreagigas)呼吸和排泄的影响。实验饥饿的时间为2,5,8,11,14,23,32d,实验牡蛎的软体部干质量为M2n=0.347g±0.071g;M3n =0.301g±0.099g。实验结果表明 :(1)二倍体长牡蛎在饥饿2～14d内 ,随着饥饿时间的延长 ,个体的耗氧率增大 ,当饥饿14d以后 ,随着饥饿时间的延长 ,个体的耗氧率下降 ;三倍体长牡蛎则表现出饥饿5d以后 ,随着饥饿时间的延长 ,个体的耗氧率下降。耗氧率与饥饿时间的关系为:Ro ,2n(mg/(个·h))= -0.08 +0.21T-0.01T2-0.01T3,Ro ,3n(mg/(个·h))= -1.97+0.45T-0.12T2+0.01T3;在饥饿2～5d内 ,二倍体和三倍体长牡蛎的耗氧率差异不显著(P>0.05) ,而饥饿5d以后 ,耗氧率的差异达到显著水平(P<0.05) ;(2)二倍体长牡蛎在饥饿2～8d内 ,随着饥饿时间的延长 ,其排氨率增加 ,当饥饿8d以后 ,排氨率则逐渐下降 ;三倍体长牡蛎则表现出饥饿5d以后 ,随着饥饿时间的延长 ,个体的排氨率下降。排氨率与饥饿时间的关系为 :RA ,2n(μg/(个·h))= -16.09 +32.65T-8.11T2 +0.57T3 ,RA ,3n(μg/(个·h))=4.57 +16.07T-5.42T2 +0.44T3 ;在实验的时间范围内 ,二倍体和三倍体长牡蛎排氨率的差异达到显著水平 (P<0.05)。Effects of starvation on respiration and excretion of diploid(2n)and triploid(3n)oysters Crassostrea gi-gas are studied.The sample initial dried weights of soft tissue were0.347g±0.071g(Mean±SE,2n)and0.301g±0.099g(Mean±SE,3n)and starvation was set for2,5,8,11,14,23and23d.Respiration and excretion rates of there oysters were affected by starvation obviously.In short period of starvation(from the2nd to the5th day),there was no significant difference in oxygen consumption between the diploid and triploid oysters(P>0.05).After the5th day,the difference was significant(P<0.05).R A of these oysters had significant difference(P<0.05).No significant difference of O:N ratios between the diploid and triploid oysters in the first2～5days of starvation(P>0.05).After the5th day,the difference was obviously.The mean O:N ratio of triploid was0.95times more than that of diploid.

关 键 词：长牡蛎(Crassostrea gigas) 二倍体 三倍体 饥饿 耗氧率 排氨率 

分 类 号：S968.3[农业科学—水产养殖]