摘要
采用室内实验的方法研究了盐度对二倍体(2n)和三倍体(3n)长牡蛎(Crassostrea gi-gas)呼吸和排泄的影响。实验的盐度(S)梯度为15,20,25,30,35共5个梯度,实验牡蛎的规格为,2n:W(软体部干质量,单位为g)=0.347±0.071 g;3n:W=0.301±0.099g。实验结果表明:盐度对二倍体和三倍体长牡蛎的呼吸和排泄有显著影响。在实验的盐度范围内,随着盐度的升高,二倍体和三倍体长牡蛎的耗氧率逐渐增大,盐度与耗氧率的关系可表示为,2n:Ro[mg/(g·h)]=0.0142S^(1.219),3n:Ro[mg/(g·h)]=0.0085S^(1.391);随盐度的升高,排氨率逐渐增大,当S为35时,二倍体和三倍体长牡蛎的排氨率略有下降,在实验的盐度范围内,盐度与排氨率的关系可表示为,2n:RA[μg/(g·h)]=-12.25+2.902S-0.0573S^2;3n:RA[ug/(g·h )]=-39.39+3.882S-0.06S^2。在实验的盐度范围内,二倍体和三倍体长牡蛎耗氧率的差异未达到显著水平(P>0.05),而排氨率的差异则有所不同,当S为15～20时,二倍体和三倍体牡蛎的排氨率差异达到显著水平(P<0.05),而S为25～35时,其差异不显著(P>0.05)。
This paper deals with the effects of salinity on respiration and excretion of diploid and triploid oysters (Grassostrea gigas). The experimental results were as follows:(1) In the range of experimental salinity (15~35), the respiration and excretion of diploid and triploid oysters were affected by salinity. The oxygen consumption rates of diploid and triploid oysters increased with the increasing salinity, and the relationship between oxygen consumption rate and salinity was expressed by the following equations: 2n:Ro[mg/(g h)] = 0.0142S1.2l9, 3n:Ro[mg/(g h)] = 0.0085S1.391 (2)The ammonia excretion rates of diploid and triploid oysters also increased with the increasing salinity, while dropped slightly when the salinity increased by 35. The relationship between ammonia excretion rate and salinity was expressed by the following equations: 2n: RA[ug/(g h)] = - 12.25+2. 902S - 0.0573S2; 3n:RA[u(g h] = - 39. 39+ 3. 882S-0. 06S 2; (3) There was no significant difference of oxygen consumption rate between diploid and triploid oysters, while the ammonia excretion rate was different; there was no significant difference between diploid and triploid oysters when the salinity was in the range of 25 ~ 35; when the salinity was in the range of 15 ~ 20, there was significant difference between diploid and triploid oysters.
出处
《海洋科学》
CAS
CSCD
北大核心
2003年第6期73-76,共4页
Marine Sciences
基金
国家自然科学基金项目39900111号
关键词
盐度
二倍体
三倍体
长牡蛎
呼吸
排泄
Salinity,Triploid,Cmssostrea gigas,Respiration,Excretion
