期刊
AQUACULTURE
卷 568, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.aquaculture.2023.739319
关键词
Gilthead seabream ( Sparus aurata) larvae; Bone health; Copper requirement
This study investigated the effects of dietary copper (Cu) levels on the growth, oxidative stress, fatty acid profile, and bone health of gilthead seabream larvae. The results showed that larval growth and survival were not affected by different dietary Cu levels. However, Cu deficiency symptoms, such as increased lipid peroxidation and reduced bone mineralization, were observed in larvae fed a non-supplemented diet. On the other hand, dietary Cu supplementation improved fatty acid composition and reduced anomalies in seabream larvae.
The effect of dietary copper (Cu) levels on growth, oxidative stress, fatty acid profile and bone health of gilthead seabream larvae (Sparus aurata) was studied in 47 days-post-hatching fish fed 4 experimental diets containing 17, 18, 19 and 25 mg Cu/kg diet. After 21 days of feeding, larval growth and survival were not affected by the dietary Cu levels. However, larvae fed the non-supplemented diet (17 mg Cu/kg) showed clear symptoms of Cu deficiency, including increased lipid peroxidation and reduced bone mineralization. Increased peroxidation risk caused a reduction in essential fatty acids and n-3 PUFA (polyunsaturated fatty acids) contents in whole body lipids, whereas the poor vertebral body mineralization in seabream larvae was related to a marked increase in abdominal vertebrae anomalies. On the contrary, dietary Cu supplementation raised whole-body contents in DHA, EPA and n-3 PUFA and reduced MUFA, TBARS and the incidence of severe, cranial, branchiostegal rays and abdominal vertebral anomalies. Polynomial regression models applied to all these parameters suggested opti-mum dietary Cu levels to be 21.5-22.6 mg/kg in gilthead seabream larvae microdiets supplemented with CuSO4.5H2O. These levels (21.5-22.6 mg/kg) are in the range of the Cu contents in copepods (12-38 mg/kg) and on the verge of the dietary levels authorized by EU Commission in feeds for cultured fish species (25 mg Cu/kg diet).
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据