摘要
在20±1℃条件下,研究了盐度(15、20、25、30、35和40)对宽壳全海笋(Barnea dilatata)稚贝存活与生长的影响。结果表明:盐度对宽壳全海笋稚贝存活、贝壳生长与软体部有机物积累影响显著;盐度15~40是稚贝的适宜生存盐度,28 d平均存活率为78.7%~91.3%;稚贝的最适生存盐度为20~30,平均存活率高于90.0%;稚贝湿重增长的最适盐度为20~35,平均特定生长率为2.963~3.028%·d^(-1);不同盐度下稚贝壳长和壳高的特定生长率变化相近,壳长和壳高生长的适宜盐度为25~35;其中盐度30条件下稚贝有机物与无机物比值最高,达4.396,盐度25次之,为3.375,均显著高于其他各组。研究结果可以为宽壳全海笋的资源保护与增养殖提供参考。
Hatchery-reared Barnea dilatata juveniles were maintained under different salinity lev- els of 15, 20, 25, 30, 35 and 40 psu at 20＋1 ℃to study the effects of salinity on the survival and growth. The results showed that the survival rate was over 90.0% under salinity of 20, 25, and 30 psu after 28 days, which was significantly higher than that observed under salinity of 15, 35, and 40 psu. The bivalves exhibited the highest increase of wet weight under the salinity of 20 and 35 psu, with the specific growth rate （SGR） at 2.963% · d^-1 and 3.028%· d^-1, respective- ly. The shell length and height showed similar changes in SGR between 25 and 35 psu. The highest ratio of organic and inorganic materials （OIR） was detected in the edible part of juveniles cultured under the salinity of 30 psu （ OIR 4.396）. The bivalves grown under 25 psu salinity had the second highest OIR at 3.375. Collectively, data from this study provide valuable information for the selection of suitable sites for B. dilatata aquaculture and for maintaining optimal rearing conditions at the B. dilatata hatcheries.
出处
《生态学杂志》
CAS
CSCD
北大核心
2017年第6期1622-1627,共6页
Chinese Journal of Ecology
基金
国家自然科学基金项目(31302186)
辽宁省农业领域青年科技创新人才培养计划(2014013)
辽宁省科学技术计划项目(2015103044)
辽宁省海洋与渔业科学技术计划项目(201209
201516)
现代农业体系建设专项(CARS-48)资助
关键词
海笋
盐度
特定生长率
稚贝
Barnea dilatata
salinity
survival
specific growth rate
juvenile.
