投喂不同海藻饵料对海上网箱幼刺参生长及成活的影响

分别采用鲜孔石莼(Ulva pertusa)、鲜角叉菜(Chondrus ocellatus)、鲜裙带菜(Undaria pinnatifida)磨碎液及其混合液与25%海泥制成四种不同配合饵料,对2.25g±0.02g的幼刺参生长和成活进行了研究。结果表明:实验60d后,投喂鲜孔石莼的幼刺体重增长达到(4.86±0.54)g,特定生长率表现出最大值,为1.36%±0.13%/d,相比对照组(3.42g±0.62g,0.82%±0.34%/d)增长显著(P<0.05),鲜角叉菜次之,体重和特定生长率分别为4.37g±0.31g和1.22%±0.22%/d,两者差异不显著(P>0.05)。幼刺参摄食鲜孔石莼、鲜角叉菜、鲜裙带菜和混合藻液其存活率分别为62.2%±0.2%、58.7%±0.3%、55.3%±0.9%、56.3%±0.7%,与对照组(50.6%±1.3%)之间差异显著(P<0.05)。研究结果显示,投喂鲜孔石莼对海上网箱幼刺参的生长和成活效果最好。因此,在刺参海上网箱养殖阶段添加鲜孔石莼是经济可行的。

Effects of different algal diets on the growth and survival of juvenile sea cucumber Apostichopus Japonicus in marine net cage

The study was conducted using diets containing four different fresh seaweeds （Ulva pertusa , Chondrus ocellatus ,Undaria pinnatif ida ） and 25% sea mud powder to generate 4 compound feeds on thegrowthandsurvivalofjuvenileseacucumber Apostichopusjaponicus（2.25±0.02g）.Theresults showed that after 60 days experiment there was a highest level on wet weight（4 .86 ± 0 .54g）of sea cu‐cumbers fed with fresh U .pertusa ,and there was a highest level on specific growth rate（1 .36 ± 0 .13% /d）of sea cucumbers fed with fresh U .pertusa ,which was significantly different than the no treat‐ment （3 .42 ± 0 .62g ,0 .82 ± 0 .34% /d） （P〈 0 .05） ,the following of fresh C .ocellatuson ,the wet weight and specific growth rate of juvenile sea cucumber A .japonicus fed with it were 4 .37 ± 0 .31g and 1 .22 ± 0 .22% /d respectively ,and there was no significantly different between them （P〉0 .05） . The survival rates of juvenile sea cucumber A .j aponicus fed with freshU .pertusa ,fresh C .ocellatuson and fresh U .pinnatif ida were 62 .2 ± 0 .2% ,58 .7 ± 0 .3% ,55 .3 ± 0 .9% and 56 .3 ± 0 .7% respective‐ly ,between those treatments and the no treatment（50 .6 ± 1 .3% ） there were significantly different on survival rate of sea cucumber A .j aponicus （P〈0 .05 ） .Compared with different diet treatments ,the growth and survival of juvenile sea cucumber were improved greatly by feeding with fresh U .pertusa in a marine net cage .Therefore ,the fresh U .pertusa being added into food in the stage of juvenile sea cucumber A .j aponicus was economical and viable .