Dietary zinc requirement of Siberian sturgeon (Acipenser baerii, Brandt 1869) juveniles, based on the growth performance and blood parameters

Abstract

This study investigated the effect of dietary Zn levels on growth performance, feed utilization, and hematological parameters of juvenile Siberian sturgeon (Acipenser baerii, Brandt 1869). The five semipurified diets were formulated by adding 0, 5, 10, 20, and 40 mg Zn kg -1 diet in the form of zinc sulfate (ZnSO 4 ) to provide the actual dietary value of 14.7, 20.8, 27.3, 37.7, and 46.4 Zn kg -1 diet, respectively. The results showed that dietary Zn elevating level significantly improved the growth and feed utilization of the fish (p \ 0.05), but not the hepatosomatic index (p [ 0.05). Erythrocyte number, hemoglobin concentration, and hematocrit were increased with raising dietary Zn level (p \ 0.05), whereas a regular trend was not observed in blood indices, including MCV, MCH, and MCHC. A significant increase was also found in the leucocyte number followed by their differential counts, except for eosinophil percentage. The broken line regression model indicated optimal dietary Zn level for growth maximization of fish was estimated to be 29.15 mg Zn kg -1 diet. In spite of well correlation with dietary Zn level, no break point was observed to estimate the juvenile Siberian sturgeon requirement based on the erythrocyte numbers.

Investigations on zinc bioavailability of different sources and dietary zinc requirement in juvenile grouperEpinephelus coioides

“…Nevertheless, no obvious mortality rate were found in present study, similar to Moazenzadeh et al. (), which indicated that basal diet (28.31 mg Zn per kg) met the minimum requirement of grouper. There was a descending tendency in the high‐dose group (80–160 mg Zn per kg) with whatever the source was, which may be explained by the fact that high level of zinc restrains the absorption of other minerals such as Mn, Cu, Fe, Ca, Mg (Clearwater, Farag, & Meyer, ; Gonzalez et al., ; Huang et al., ; NRC, ).…”

“…Dietary requirement of zinc varied from fish species: 17.0 mg Zn per kg (as ZnSO 4 ·7H 2 O) diets for the minimum zinc requirement of hybrid striped bass Morone chrysops × Morone saxatilis (Buentello et al., ), 55.1 mg/kg dietary zinc (as ZnSO 4 ·7H 2 O) for juvenile grass carp ( Ctenopharyngodon idella ) (Liang et al., ), 37.2 and 52.1 mg zinc per kg (as ZnSO 4 ·7H 2 O) diet for Nile tilapia ( Oreochromis niloticus ) (Huang et al., ) and 29.15 mg/kg dietary zinc (as ZnSO 4 ·5H 2 O) for Siberian sturgeon juveniles (Moazenzadeh et al., ). Interestingly, Chen et al.…”

“…It had been proved that zinc plays an important role in the development of immune cells and gene regulation in lymphocytes due to its innumerable roles in basic cellular functions such as DNA replication and RNA transcription (Barragán et al., ; Efeovbokhan et al., ; Shankar & Prasad, ). Zinc has been found as functional cofactor in over 300 metalloenzymes such as superoxide dismutase (SOD) and alkaline phosphatase (AKP) (Moazenzadeh et al., ; Mvdo, Pezzato, Mmbf, & Pdem, ; Prasad, ; Sahin, Tuzcu, & Cakmak, ). The Cu‐Zn SOD and catalase (CAT) are important parts of primary antioxidant defense system in mammalian cells, protecting against reactive oxygen (Betteger & Bray, ).…”

“…High doses of zinc can be poisonous for organism, therefore, what counts much is to find the appropriate zinc requirement of animals. Dietary requirement of zinc has been studied on channel catfish ( Ictalurus punctatus ) (Gatlin & Wilson, ), red drum ( Sciaenops ocellatus ) (Gatlin, O'Connell, & Scarpa, ), hybrid striped bass ( Morone chrysops ♀ × Morone saxatilis ♂) (Buentello, Goff, & Gatlin, ), grass carp ( Ctenopharyngodon idella ) (Liang, Yang, Liu, Tian, & Liang, ), juvenile grouper, Epinephelus malabaricus (Chen, Cheng, Hu, & Chen, ), Nile tilapia ( Oreochromis niloticus ) (Huang et al., ), and juvenile Siberian sturgeon ( Acipenser baerii , Brandt 1869) (Moazenzadeh, Islami, Zamini, & Soltani, ).…”

Factors Affecting Fish Blood Profile: A- Effect of Nutritional Treatments

“…He added that clove oil (extracted from the plant Eugeaia caryaphyllata) is a local product, safe, effective, and cheap narcotic agent well recommended for fish narcosis. Moazenzadeh et al (2017) investigated the effect of dietary Zn levels (0, 5, 10, 20, and 40 mg Zn /kg) on hematological parameters of juvenile Siberian sturgeon (Acipenser baerii, Brandt 1869). Erythrocyte number, Hb concentration, and Hct were increased with raising dietary Zn level (P≤0.05), whereas a regular trend was not observed in blood indices, including MCV, MCH, and MCHC.…”