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| Main Authors: | , , , , |
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| Format: | Artículo científico |
| Language: | en |
| Published: |
Scientific reports
2025
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| Subjects: | |
| Online Access: | https://pubmed.ncbi.nlm.nih.gov/40348796/ |
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Table of Contents:
- Estimation of dietary copper requirements of Coho salmon Oncorhynchus kisutch (Walbaum, 1792), and effects on the growth performance, tissue Cu content, antioxidant capacity and hematological parameters. Yu, Hairui Li, Lingyao Yu, Leyong Yao, Yujing Zhang, Ling Animals Copper Oncorhynchus kisutch Antioxidants Animal Feed Dietary Supplements Diet Aquaculture Liver Copper (Cu) is an essential trace mineral for the growth of most farmed fish species. Since natural water typically contains low Cu levels, exogenous Cu supplementation may be required in intensive aquaculture systems to meet the nutritional requirements of certain fish species. A 10-week feeding experiment was conducted to evaluate the Cu requirement on growth performance, tissue Cu content, hematological parameters and anti-oxidant responses in coho salmon Oncorhynchus kisutch (Walbaum, 1792). In this experiment, six experimental diets supplemented with graded Cu (CuSO used as Cu source) contents (0.20, 2.10, 3.70, 5.80, 7.75, and 9.85 mg/kg) to feed the fish (180.22 ± 0.41 g). Total 180 fish were randomly distributed across 18 individuals tank (10 fish/cage, water volume 1,000-L) fed three times a day. The result showed that the mortality and morphological indices were completely unaffected by the increasing Cu supplementation in the diet (P > 0.05). Whereas, the non-supplemented diet (0.20 mg Cu/kg) had a poor growth performance of the fish (P 0.05) were observed in the proximate composition of muscle across graded dietary copper levels. However, increasing dietary Cu level induced Cu accumulation (P 5.8 mg/kg) did not further increase of muscle and liver in coho salmon. Compared with the 0.20 Cu mg/kg in diet, the supplemented diet enhanced the antioxidant capacity in liver and serum, and decrease the content of malondialdehyde in liver (P