摘要
仿刺参室外池塘网箱保苗是近年来兴起的一种半生态式的保苗方式。于2014年7—11月在仿刺参室外池塘网箱保苗期间,通过现场试验比较研究了不同投苗规格[大规格(0.093±0.004)g/头,小规格(0.024±0.001)g/头]和密度(低密度125g/m3、中密度250g/m3、高密度375g/m3)两因素对仿刺参苗生长、成活率和产量的影响。结果表明,对于同一规格的仿刺参苗,低密度组体质量与特定生长率高于中、高密度组;相同密度条件下,大规格苗种成活率显著高于小规格(P<0.05),小规格低密度组仿刺参苗的成活率显著高于高密度组(P<0.05),大规格低密度组仿刺参苗的成活率显著高于中、高密度组(P<0.05)。不同密度组收获仿刺参苗的总产量无显著差异(P>0.05),但低密度组收获仿刺参苗的净产量高于中、高密度组。通过两因素方差分析可知,规格的主效应及二者的交互作用对仿刺参苗成活率有显著的影响(P<0.05),密度的主效应对仿刺参苗成活率有极显著的影响(P<0.001);两因素的主效应及其交互作用对仿刺参苗总产量均无显著的影响(P>0.05)。规格主效应及二者的交互作用对仿刺参苗净产量的影响不显著(P>0.05),密度主效应对仿刺参苗净产量有显著的影响(P<0.05)。因此,仿刺参室外网箱保苗过程中投放大规格、低密度苗种能够保证较高的成活率和净产量,而且可以节省苗种资源和饵料投喂量,降低单位面积生产成本和管理成本,提高产出投入比和经济效益。
Seedling culture of sea cucumber （Apostichopus japonicus）, using net cages in earthen ponds, is a semi-ecological seedling protection pattern arising in recent years. Field experiment was conducted in net cages set in earthen pond to investigate the effects of size [large size （0. 093±0. 004） g/ind and small size （0. 024±0. 001） g/ind] and density （low density 125 g/m3 , middle density 250 g/m3 and high density 375 g/m3） on growth, yield and survival rate of sea cucumber during intermediate seedling culture period from July to October in 2014. The results showed that the body weight and the specific growth rate of seedling were in low density higher than that in middle density and high density in the same size, that the large size had significantly higher survival rate than the small size in the same density groups （P〈0.05）, that the survival rate of small size in low density was significantly higher than that in high density （P〈 0.05）, and that the survival rate of large size was significantly higher in low density than that in middle density and high density （P〈0.05）. There was no significant difference in total yield of seedling in different density cages （P〉0.05）, higher net production of seedling in low density than that in middle density and high density. The two-way ANOVA revealed that the main effect of size and the interaction of two factors had significant influence on the survival rate （P〈0.05）, the main effect of density had a highly significant influence on the survival rate （P〈0. 001）. The main effects as well as the interaction of the two factors were not found to be significant influence on the total yield （P〉0.05）. The main effect of size and the interaction of the two factors did not show significant influence on net production （P〉0.05）, while main effect of density had a significant influence on net production （P〈0.05）. Therefore, releasing of large size seedling with low density could not only ensure high survival rate and net production, but also save seedling resources and feed quantity, reduce the production and management cost per unit area, eleva- ting input-output ratio and economic benefit during intermediate seedling culture period of sea cucumber.
出处
《水产科学》
CAS
CSCD
北大核心
2016年第6期633-638,共6页
Fisheries Science
基金
山东省科技发展计划项目(2010GHY10505)
山东省科技厅资助项目(2014GSF117010)
东营市科技发展计划项目(2013GG22003)
关键词
仿刺参
保苗
密度
规格
成活率
特定生长率
产量
Apostichopus japoncius
seedling culture
density
size
survival rate
specific growth rate
yield
