Zinc supplementation in practical diets for pond-raised hybrid snakehead (Channa maculate ♀ × Channa argus ♂) fingerlings: Effects on performance, mineral retention and health

Diet supplementation of organic zinc positively affects growth, antioxidant capacity, immune response and lipid metabolism in juvenile largemouth bass, Micropterus salmoides

“…Zinc is an important trace element required in several physiological and biochemical reactions which take place in various tissues in animals (27) . To date, several researches have verified the essential roles of zinc in aquatic animals like tilapia (28) , rainbow trout (29) and snakehead (30) , mainly focusing on its effects in enhancing growth performance, antioxidant capacity, innate immunity and metabolism. In the present study, we first compared the difference in growth parameters of M. salmoides fed Con diet or diets supplemented with zinc products, elucidating that zinc inclusion generally enhanced the growth rate, which was indicative of improved growth performance.…”

“…However, some researches revealed that Zn contents might also remain unaffected by the treatment of Zn. Hybrid snakehead showed no significant difference in Zn contents in whole body, vertebrae and liver when fed with different dietary level of Zn (30) , and Zn concentration of L. vannamei was also reported to be not sensitive to the variation of dietary Zn in whole body (10) , which showed inconsistency in response to different level of Zn exposure in multiple aquatic animals. It could be illustrated as well from our results that organic Zn exhibited higher bioavailability than inorganic Zn, as a supplement level of 90 mg/kg organic Zn in diets would be sufficient for the proper requirement of M. salmoides , while treatment of 120 mg/kg inorganic Zn retained less Zn than that of 60 and 90 mg/kg organic Zn, although no significant differences were recorded.…”

“…Some previous researches have elucidated that a high level of dietary intake of Zn inhibited the absorption and deposition of Cu, another vital trace element for animals (9,30,40) . In our research, such trend appeared to be less remarkable, even though the Cu content slightly declined in Zn-supplemented groups when compared with Con group.…”

“…Study on Ictalurus punctatus also elucidated that https://doi.org/10.1017/S0007114523000909 Published online by Cambridge University Press Accepted manuscript zinc methionine potently met the requirements of zinc with much lower supplement level than zinc sulfate (21) . Some previous researches have elucidated that a high level of dietary intake of zinc inhibited the absorption and deposition of copper, another vital trace element for animals (9,30,40) . In our research, such trend appeared to be less remarkable, even though the copper content slightly declined in zinc supplement groups when compared with Con group.…”

Effects of Different Dietary Selenium Sources on the Meat Quality and Antioxidant Capacity of Yellow Catfish (Pelteobagrus fulvidraco)

“…Duncan's multiple range test was used to detect significant differences between groups, and the significance level was set at P < 0.05. The correlation analysis followed the methods described by Fei et al [ 30 ].…”