Use of Porphyra spheroplasts as feed additive for red sea bream
Use of Porphyra spheroplasts as feed additive for red sea bream
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DOI：
10.1111/j.1444-2906.2007.01501.x
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发表时间：
2008-02-01
影响因子：
1.9
通讯作者：
Sakamoto, Shuichi
中科院分区：
文献类型：
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作者：
Kalla, Alok;Yoshimatsu, Takao;Sakamoto, Shuichi
以白鱼粉为主要蛋白质来源，配制了添加和不添加5%紫菜球体(PS)的两种试验饲料。在实验室光照条件下(明暗12h：12h)，在温控海水(盐度32~34℃，25℃，8 L/m in)的渗流系统(100 L)中，普通曝气量(400~600 m L/m in)条件下，对平均体重15.4±/-0.1g的真斑罗非鱼进行养殖。分别于10：00、14：00、18：00以6%体重人工投喂，每天3次，共42天。研究表明，饲喂含有球形体的饲料(PS饲料)的组的生长性能、存活率和养分存留率显著高于对照组(P<；0.05)。此外，饲喂PS饲料的鱼显示出显著(P<；0.05)较低的饲料转化率。在不影响血清相关参数的情况下，PS组和对照组的两组饮食在接近成分和脂肪酸方面具有相似的身体营养状况水平。从这些实验结果可以看出，含有紫菜球体的饲料不仅可以最大限度地促进大紫菜的生长，而且还可以利用饲料成分。
Two test diets with and without 5% Porphyra spheroplasts (PS) were formulated using white fishmeal as the main protein source. Red sea bream Pagrus major (mean body weight 15.4 +/- 0.1 g) were maintained in a flow-through system (100 L) of thermo-controlled sea water (salinity 32-34, 25 degrees C, 8 L/min) with ordinary aeration (400-600 mL/min) under laboratory light conditions (light-dark 12 h:12 h). Fish were fed three times a day at 10:00, 14:00 and 18:00 hours by hand for 42 days at 6% body weight on each experimental diet. Studies revealed that growth performance, survival and nutrient retention were significantly (P < 0.05) higher in the groups fed a diet containing spheroplasts (PS diet). Further, the fish fed the PS diet showed significantly (P < 0.05) lower feed conversion rates. Both groups of the PS and control diets had similar levels of body nutritional profile in terms of proximate compositions and fatty acids without compromising blood serum related parameters. From these experimental results, thus, it is comprehensible that a supplementary diet containing Porphyra spheroplasts can be used for maximizing not only growth of P. major but also for utilization of the feed ingredients.