不同饲料对刺参幼参的生长、耗氧和排氨的影响

Effect of Different Feeds on the Growth,Oxygen Consumption and Ammonium Excretion of Apostichopus japonicus

研究投喂底栖硅藻(琴氏菱形藻微小变种(Nitzschia panduriformis var.minor Grunow)、菱形藻(Nitzchia sp.)、筒柱藻(Cylindrotheca fusiformis))和商业饲料对刺参(Apostichopus japonicus)幼参的生长、耗氧率和排氨率的影响。实验表明:饵料种类对刺参幼参的特定生长率、耗氧率和排氨率具有显著性的影响。3种底栖硅藻组刺参的特定生长率高于商业饲料组,其中摄食琴氏菱形藻微小变种的刺参幼参的特定生长率最大,为1.742%/d,显著高于其他各组;菱形藻组、筒柱藻组和商业饲料组之间的特定生长率(SGR)无显著性差异。刺参摄食琴氏菱形藻微小变种后其耗氧率最低,为0.021 9mg·g-1·h-1,显著低于另外3组,菱形藻组、筒柱藻组和商业饲料组的耗氧率无显著性差异。琴氏菱形藻微小变种组刺参的排氨率最大,为3.82μg·g-1·h-1,显著高于另外3组。研究表明,与其他3种饵料相比,琴氏菱形藻微小变种更有利于刺参的生长。

The growth, oxygen consumption and ammonium excretion rate of Apostichopus japonicus were measured when it was fed with different benthic diatom, either Nitzschia panduriformis var. minor, or Nitzchia sp. , or Cylindrotheca fusiformis, and a commercial feed. The results showed that the specif ic growth rate （SGR）, oxygen consumption rate and ammonium excretion rate were all significantly differ ent among groups （P〈0. 05）. The SGR of A. japonicus when being fed with benthic diatoms was higher than that when being fed with commercial feed. The SGR of seacucumber feeding N. panduriformis var. minor was the highest （1.74%/d）, significantly different from that of seacumber feeding others. The SGR of seacucumber feeding with either Nitzchia sp. or C. fusiformis or the commercial feed is similar each other. The oxygen consumption rate of seacucumber feeding with N. panduriformis var. minor was the lowest （0. 021 9 mg/（g .h））, significantly lower than that of seacucumber feeding with other feeds, which was similar each other. The ammonium excretion rate of seacucmber feeding N. panduriformis var. mi nor was the highest （3.82 μg/（g. h））, significantly higher than that of sea cumber feeding with other feeds. It was concluded that N. panduriformis var. minor was the best.