In the present study the effects of dietary Saccharina japonica on growth performance, flesh quality traits, and serum thyroid hormones (tetraiodothyronine (T4) and triiodothyronine (T3)) of juvenile black sea bream, Acanthopagrus schlegelii, were investigated. Seven diets containing graded levels of S. japonica (0, 0.1, 0.2, 1.2, 2.5, 5, and 10%) were formulated. Each diet was randomly assigned to sex replicate groups of 40 fish. After a 90-day feeding trial, the best growth performance was achieved in fish fed with the 2.5% S. japonica diet, with significantly higher weight gain rate (WGR) and lower feed coefficient (FC) than those fed with the other diets (P < 0.05). Meanwhile, S. japonica supplementation had no significant effects (P > 0.05) on proximate composition of the whole body and the muscle. However, the content of n-6PUFA, n-3PUFA, and LC-PUFA in the muscle was significantly increased with the increasing level of dietary S. japonica. No differences in the flesh texture, cooked meat rate and water holding capacity were found among fish fed with different diets. It was further demonstrated that dietary S. japonica significantly fortify fillets with iodine (from 0.11 to 1.05 mg kg⁻¹DM) and increased serum T4 and T3 levels. These results showed that the inclusion of up to 2.5% of S. japonica meal in diets could be beneficial to aquaculture of juvenile black sea bream, while higher inclusion levels resulted in significantly smaller fish. Moreover, the content of flesh iodine content quintupled in fish fed 2.5% up to 2.5%, confirming S. japonica as a natural and effective tool to increase the nutritional value of juvenile black sea bream.

在本研究中，研究了日粮糖精对少年黑鲷Acanthopagrus schlegelii的生长性能，肉质性状和血清甲状腺激素（四碘甲状腺素（T4）和三碘甲状腺素（T3））的影响。配制了七种日粮等级含量分别为（0、0.1、0.2、1.2、2.5、5和10％）的日粮。每种饮食被随机分为40条鱼的性别重复组。经过90天的饲喂试验后，饲喂2.5％粳稻日粮的鱼比其他日粮饲喂的鱼，其增重率（WGR）和饲喂系数（FC）显着提高（P  <0.05）。同时，日本粳补充剂对 全身和肌肉的近邻成分无显着影响（P > 0.05）。然而，正6PUFA，正3PUFA，和LC-PUFA的肌肉中的含量与饮食的增加水平显著上升国槐。在饲喂不同日粮的鱼中，肉的质地，熟肉率和持水量没有差异。进一步证明，日本血吸虫可以显着强化鱼片中的碘（从0.11到1.05 mg kg ^-1 DM），并增加血清T4和T3水平。这些结果表明，最多含有2.5％的日本粳稻。饮食中添加一顿膳食可能有利于少年黑鲷的水产养殖，而较高的夹杂物含量则导致鱼的数量明显减少。此外，饲料中鱼肉中碘含量的含量增加了五倍，从2.5％增至2.5％，这证明日本刺槐是增加少年黑鲷营养价值的天然有效工具。