Effects of dietary zinc level on performance, zinc status, tissue composition and enzyme activities of juvenile Siberian sturgeon, Acipenser baerii (Brandt 1869)

Abstract

This study conducted to evaluate the effect of dietary zinc (Zn) levels on feed utilization, tissue Zn composition and serum enzyme activities of juvenile Siberian sturgeon, Acipenser baerii. Five isoenergetic and isonitrogenous semi‐purified diets were formulated with increasing Zn sulphate (ZnSO4.5H2O) level to provide the actual Zn values of 14.7 (control), 20.8, 27.3, 37.7 and 46.4 mg/kg diet. Each diet was assigned to three groups of 20 experimental Siberian sturgeons with uniform size (initial weight of 26.52 ± 0.94 g) for a period of 8‐week feeding trial. Results showed that growth performance and muscle protein content were significantly increased with increasing dietary Zn level up to 27.3 mg/kg (p < .05), beyond which they remained significantly unchanged (p > .05). Muscle lipid content significantly declined with increasing dietary Zn level. While muscle and serum Zn contents were not significantly changed among treatments (p > .05), liver Zn content tended to rise with increasing dietary Zn supplementation. Alkaline phosphatase, superoxide dismutase and glutathione peroxidase activities were also raised with increasing dietary Zn level. The adequate amount of dietary Zn requirements for the Siberian sturgeon was estimated to be 28.24 mg/kg based on the relative growth rate and 34.60 mg/kg based on the liver Zn content.

Influence of dietary zinc on growth, zinc bioaccumulation and expression of genes involved in antioxidant and innate immune in juvenile mud crabs (Scylla paramamosain)

“…Thus, AKP can be used as an important indicator to evaluate Zn status in aquatic animals (27) . In the present study, AKP activity in haemolymph was higher in crabs fed the diets containing 68•5 and 97•3 mg/kg Zn compared with crabs fed the other diets, and similar results were found in blunt snout bream (Megalobrama amblycephala) (27) , grass carp (44) , Indian major carp (20) , Nile tilapia (60) and Siberian sturgeon (Acipenser baerii) (61) .…”

Folic Acid-Coated Nanochitosan Ameliorated the Growth Performance, Hematological Parameters, Antioxidant Status, and Immune Responses of Rainbow Trout (Oncorhynchus mykiss)

“…Therefore, activities of these antioxidant enzymes could serve as a biomarker of the antioxidant defense status of the organism. SOD is one of the antioxidant proteins that catalyze the rapid dismutation of superoxide radicals (O 2− ) into molecular oxygen (O 2 ) and hydrogen peroxide (H 2 O 2 ), while GPX and CAT promote the conversion of H 2 O 2 to water and oxygen, thereby providing cellular defense against oxidative damages (51)(52)(53). In the present study, SOD and CAT activities increased with increasing dietary FA-coated nanochitosan supplementation up to 0.50 mg kg −1 and thereafter tended to decline, which is in accordance with studies on murrel, Channa punctata (10), grouper (14), and Siberian sturgeon (16).…”

Effects of dietary Zn on growth, antioxidant capacity, immunity and tolerance to lipopolysaccharide challenge in juvenile Chinese mitten crab Eriocheir sinensis

“…A previous study showed that Zn concentration in the liver of tilapia increased as Zn supplementation in the diet exceeded the optimal requirement level (Huang et al, 2015). Similarly, the Zn content in the liver of juvenile Siberian sturgeon ( Acipenser baerii ) was enhanced by feeding the animal with a diet containing 37.7 mg/kg Zn (Moazenzadeh et al, 2018). In addition to the effect of dietary Zn on the Zn content in the tissue, Zn also participates in the metabolism of proteins, carbohydrates and other nutrients in animals (Vallee & Falchuk, 1993).…”

“…In intensive aquaculture, the precise need for dietary nutrition in economically important species needs to be determined to improve animal growth and health. The necessity of adding mineral nutrients in feed has recently attracted wide attention (Fisheries Bureau of Agriculture Ministry of China, 2020) because micronutrient intake is closely related to the health and immunity of aquatic animals (Moazenzadeh et al, 2018; Yuan et al, 2020).…”

“…Ministry of China, 2020) because micronutrient intake is closely related to the health and immunity of aquatic animals (Moazenzadeh et al, 2018;Yuan et al, 2020).…”