摘要
2004年10～11月和2005年的8～9月利用平面流水循环系统对硬壳蛤稚贝的中间培育进行了研究．研究结果表明：不同的流水量和放苗密度对硬壳蛤稚贝的生长、存活有较大影响，但影响程度各不相同．硬壳蛤稚贝的最佳培育规模2～6mm，不同流水量实验中当流水量达到58．6dm^3／min时，在第18天贝苗总重由6．125kg／m^2增加到7．5kg／m^2，壳长也由5．77mm增加到8．55mm，成活率达79％，水质检测发现，流水量越大的梯度组出水中叶绿素含量越高，氨氮含量越低，流水量越小出水叶绿素含量越低，氨氮含量越高；不同密度实验中当放苗量为0．625kg／m^2时，在第24天贝苗由0．625kg／m^2增加到4．125kg／m^2，壳长也由2．86mm增加到6．98mm，成活率达66％，水质检测发现，密度越高的梯度组出水中叶绿素含量越低，氨氮含量越高，密度越小出水叶绿素含量越高，氨氮含量越低．整个实验过程中对氨氮，pH，盐度等理化因子进行了检测，结果显示所有指标均在安全范围内，保证了稚贝正常快速的生长．
In this paper,juvenile hard clam cultivated in circulatory raceway system was studied from October to November in 2004 and from August to September in 2005. The results showed that 2 -6mm juvenile hard clam were optimal size for culture in this system. When juvenile hard clam were cultured with different flow or at different density,both survival rate and weight gain changed in 58.6dm^3/min flow greow from 5.77 mm to 8. significantly and differently. The juvenile hard clams cultured with 55 mm and weight increased from 12. 5 kg to 30 kg after 18 d with survival rate of 79%. The results of water quality detection found showed that chlorophyll content increased and ammonia concentration decreased with increasing flow. In experiments of density cultures the 2. 5kg group grew from 2.86mm to 6.98mm and weight increased from 2.5kg to 16. 5kg with survival rate of 66% after 24d. The water quality indicated that chlorophyll content decreased and ammonia concentration increased with an increase in culture density. During the experiment procedure, factors of ammonia content, pH, salinity and etc were secured, which promoted a fast growth of the juvenile hard clam.
出处
《台湾海峡》
CAS
CSCD
北大核心
2008年第2期197-203,共7页
Journal of Oceanography In Taiwan Strait
基金
浙江省重大科技攻关基金资助项目(021102540)
浙江省海洋开发与管理基金资助项目(01-03)
温州市科技发展计划基金资助项目(S2001A02)
