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Showing 7 results for Torfi Mozanzadeh
M. Zabayeh Najafabadi, M. Torfi Mozanzadeh, E. Pagheh, J. Ghafleh Maramazi, J. Hosseini, Sh. Mahrjooyan, R. Osooli, H. Saghavi, J. Monem, R. Nahavandi,
Volume 27, Issue 3 (8-2018)
Abstract
A 30-day research was conducted to evaluate the effects of different feeding rate (formulated diet) (2, 4, 6, 8 and 10% of wet body weight/day) and also fresh food (20% of wet body weight/day) on growth performance and feed utilization of Sparidentex hasta fry in nursery phase. Growth performance including final weight and specific growth rate (SGR) significantly increased with increasing feeding rate (p<0.05). The relationship between SGR (% per day) and ration level (% per day) was an asymptotic curve described as SGR = 0.2809X+1.4191. Feed efficiency ratio (FER) decreased significantly with increasing ration levels, and the relationship between FER and ration level (% per day) described as FER = -0.0586X+1.3184. Hepatosomatic index significantly increased with increasing feeding rate (p<0.05). Based on the above results, it may be concluded that a ration size of 8% of body weight per day is optimal for good growth and feed conversion efficiency of juvenile S. hasta in nursery phase.
E. Pagheh, J. G. Marammazi, N. Agh, F. Nouri, A. Sepahdari, M. Torfi Mozanzadeh,
Volume 28, Issue 1 (5-2019)
Abstract
The current study aimed to evaluate effects of four levels (0, 2, 4 and 6 % of diet) of soybean lecithin in the isoproteic and isoenergitic (50% protein and 18.5 kj/g) diets on growth performance, feed utilization and hematological parameters of juvenile sobaity seabream (Sparidentex hasta) with initial weight of 37.9±0.16 g. At the end of 56 days of feeding trial, results showed that growth performance increased with increasing dietary lecithin from 0 to 6%; however, growth decreased with increasing dietary lecithin from 6 to 9%. Fish fed the 6% lecithin diet had the highest final weight (86.19±2.99 g), weight gain (48.41±3.6 g) and specific growth rate (1.47±0.07) (p<0.05). Survival rate, feed conversion and protein efficiency ratios as well as hematological parameters were not changed in different groups (p>0.05). The results of this research showed that, inclusion of 6% of soybean lecithin in diet for sobaity seabream juvenile is optimum for improving growth performance parameters in this species.
Mansour Torfi Mozanzadeh, Takavar Mohammadian, Mina Ahangarzadeh, Hosein Houshmand, Abolfazl Sepahdari, Mojtaba Najafabadi, Rahim Oosooli, Hamid Saghavi, Javad Monem, Shapoor Mehrjooyan, Mahmoud Hafezieh, Maryam Mirbakhsh, Elham Osroush, Mosayeb Seyedi,
Volume 31, Issue 5 (12-2022)
Abstract
In the present study, the effects of different probiotics mixtures on growth performance, hematology and antioxidant capacity of Asian seabass (Lates calcarifer) juveniles (30 g). In this study, three bacterial mixtures were used that were isolated from the native aquatic species of Khuzestan and the South of the country, which include: the first group includes different strains of Lactobacillus plantarum, the second group includes L. plantarum with a mixture of L. bulgaricus, L. acidophilus and L. rahamnosus and the third group includes the mixture of bacteria of the first and second groups along with the mixture of Bacillus cereus and B. thuringiensis, which were identified through their quorum quenching features and isolated from Asian sea bass. Four treatments were designed by spraying various bacterial mixture on a basal diet, which included diet (1, control group) on which only sterile physiological serum was sprayed on the diet, diet (2) on which the bacterial mixture of the first group was sprayed on the diet, diet (3) on which the mixture of bacteria of the second group was sprayed and diet (4) which was the mixture of all bacteria was sprayed on it and fed to the fish. The fish was fed with the experimental diets four times a day up to satiation at 30.5 °C for 100 days. In this study, the fish that was fed with 2, 3 and 4 diets had a higher growth performance than the control (p < 0.05), which was associated with an improvement in the food conversion ratio. Blood and antioxidant indices were improved in the fish fed with diets containing probiotics mixture. Treatment 4 had more total plasma protein and albumin than other treatments. In conclusion, the use of a mixture of different probiotics increased growth in Asian seabass that associated with improved health indices in this species.
Mansour Torfi Mozanzadeh, Mojtaba Zabayeh Najafabadi, Hosein Houshmand, Mina Ahangarzadeh, Rahim Oosooli, Hamid Saghavi, Shapoor Mehrjooyan, Seyed Reza Seyed Mortezaei, Seyed Javad Hoseini Malayeri, Mahmoud Hafezieh, Homayoon Hoseinzadeh Sahafi,
Volume 32, Issue 5 (12-2023)
Abstract
The present research was started in 2016 at Bandar Imam Khomeini Marine Fish Research Station. The aim of this project was to produce fertile broodstock and achieve the biotechnique of larval propagation and fry production of the Asian sea bass. In this regard, the Thai fry strain were introduced in the station over three different years and their breeding was done until the pre-breeding stage. After four years, 3- and 4-year-old female pre-brooders and 1.5-year-old male pre-brooders were produced, and in the summer of 2022, these brooders were propagated by artificial reproduction method through injecting. In Khuzestan, the reproduction season begins from June to the end of September at a temperature between 28 and 34 ºC. The fish spawning occurs between 36 and 40 h after injection at midnight. The LHRH-α2 hormone was injected intramuscularly for the artificial reproduction of this species. The percentage of fertilization, hatching, and survival of 3-day-old larvae of Asian sea bass in different months varied between 78-92%, 82-93%, and 75-85%, respectively. From February 2022 to July 2023, 208 brooders were donated to 5 private hatchery sectors in Khuzestan and Hormozgan provinces for the mass seed production of this species. The results of the current project showed that the establishment of biosecurity is the most important principle in the implementation of breeding programs, domestication of new marine fish candidates, and selective breeding programs. Also, Asian sea bass has great potential for reproduction in captivity and mass fry production, and it can help short-term programs for the development of marine cage culture in the southern waters of Iran.
Shapour Mehrjooyan, Saeed Ziaei-Nejad, Mansour Torfi Mozanzadeh, Laleh Mousavi Dehmourdi,
Volume 33, Issue 1 (4-2024)
Abstract
An eight-week study was conducted to examine the effects of dietary butyric and propionic supplementation levels on growth and gut microflora in juveniles’ sobaity seabream (Sparidentex hasta). In this regard, a basal diet (44% crude protein and 15% lipid) was supplemented with various levels of butyric (BA) and propionic acids (PA) to design seven experimental feeds as follow: 1-control (diet without organic acid supplementation), 2- BA 0.5%, 3- BA 1%, 4- PA 0.5%, 5- PA 1%, 6- BA+PA 0.5% (0.25% BA+0.25% PA supplementation), 7- BA+PA 1% (0.5% BA+0.5% PA supplementation). Three hundred and fifteen fish with initial weight of 28.5±0.5 g were distributed among 21 polyethilene tanks (300 L). The fish were fed with the experimental diets three times a day up to visual satiation making sure that no feed remain at the bottom of the tanks. Water temperature and salinity were 31.3 °C and 46 g/L, respectively. The fish fed with 0.5 and 1% PA or 0.5% blends of BA and PA had higher growth rate than other groups. Also, the improvement of food conversion ratio was observed in the treatment fed with 0.5% PA and 1% BA treatments. Total bacterial count in the gut did not affect by the experimental feeds but lactic acid bacteria count increased with supplementing acidifiers in diet. Based on the findings of this study, 0.5% PA or blends of PA and BA at 0.5% level are recommended for improving growth and gut health condition in juveniles’ sobaity seabream.
Rahim Oosooli, Prita Kochanian, Mansour Torfi Mozanzadeh, Takavar Mohammadian, Vahid Yavari,
Volume 33, Issue 2 (6-2024)
Abstract
A 70-day study was conducted to examine the effects of dietary butyric and probiotic (Lactobacillus plantarum) supplementation on growth, digestive and antioxidant enzymes activities in Arabian yellowfin seabream (Acanthopagrus arabicus). In this regards, butyric (BA) and L. plantarum were used to design six experimental feeds as follow: 1-control (diet without supplements), 2- probiotic (1.6 × 108 CFU/g) 3-BA 0.5 (0.5% BA supplementation), 4- BA 1.0 (1% BA supplementation), 5- PRO+BA0.5 (probiotic+0.5% BA), 6- PRO-BA 1.0 (probiotic+1% BA). Five hundred and forty fish with initial weight of 2.7 ± 0.1 g were distributed among 18 polyethylene tanks (300 L). Fish were fed with the experimental diets three times a day up to visual satiation making sure no feed remain at the bottom of the tanks. Water temperature and salinity were 31.3 °C and 46 ppt, respectively. Fish fed control and probiotic diets had higher growth rate and feed efficiency than other groups. Fish in PRO-BA1% group had higher total length than other groups. Alkaline phosphatase and chymotrypsin activities in fish fed mixture of probiotic and BA was higher than the other treatments. Amylase activity in fish fed BA1%, PRO-BA0.5 and PRO-BA1% was higher than other groups (P < 0.05). Protease, trypsin and lipase activities did not affect by dietary treatments. Glutathione level in the liver of fish fed control and PRO-BA0.5% was higher than other treatments. Superoxide dismutase activity in fish fed BA1% diet was lower than the other treatments. Catalase activity in fish fed mixture of probiotic and BA was higher than other groups. The findings of the present study demonstrated that inclusion of dietary BA alone might marginally compromise growth in A. arabicus juveniles, but using a mixture of probiotic and BA in both 0.5 and 1% can improve digestive enzyme activity and antioxidant capacity in this species.
Mojtaba Zabayeh Najafabadi, Hamid Mohammadiazarm, Mansour Torfi Mozanzadeh, Ali Shahriari,
Volume 33, Issue 5 (12-2024)
Abstract
Introduction
During gonadal development and sexual maturation in fish, the metabolic rate in these tissues increases rapidly, generating a substantial number of free radicals (Fernandez-Palacios et al., 1998; Izquierdo et al., 2001). Research on various fish species has shown that incorporating high levels of vitamin E into fish diets reduces larval deformities, improves fecundity, enhances larval quality and development, and increases antioxidant resistance in eggs (Nascimento et al., 2014; Erdogan and Arslan, 2021). Conversely, a deficiency of vitamin E in the diet of female broodstock can lead to the development of immature gonads, reduced egg fertilization, lower hatching rates, and decreased larval survival (Miller et al., 2012). During vitellogenesis in various fish species, vitamin E is transported by lipoproteins from visceral tissues to the ovaries (Lie et al., 1993; Hemre et al., 1994; Tokuda et al., 2000; Huang et al., 2019). For instance, in Japanese flounder (Paralichthys olivaceus), dietary supplementation of vitamin E at 1000 mg/kg has been found to enhance vitellogenesis, as well as the transfer and storage of this vitamin in the ovaries (Tokuda et al., 2000). Similarly, in turbot (Scophthalmus maximus), the addition of vitamin E to the diet has been shown to stimulate the synthesis and secretion of reproductive hormones, specifically follicle-stimulating hormone (FSH) and luteinizing hormone (LH) (Huang et al., 2019). Acanthopagrus arabicus, commonly known as the yellowfin seabream, is a carnivorous species belonging to the family Sparidae. It has been recognized as a promising candidate for the development of cage aquaculture along the southern coasts of Iran (Torfi Mozanzadeh et al., 2021). However, there is limited information regarding the vitamin requirements of this species, particularly for broodstock. Therefore, the present study was conducted to investigate the effects of vitamin E supplementation on the reproductive and physiological performance of A. arabicus.
Methodology
Initially, broodstock aged 1 to 2 years were captured by fishermen using hook fishing methods in the Khormousi fishing area, beginning in mid-November. The broodstock of A. arabicus was maintained in two concrete tanks, each with a volume of 10 cubic meters, at a density of 10 fish per cubic meter. Vitamin E was prepared at seven concentrations: 0, 25, 50, 100, 250, 500, and 1000 mg per kg of diet. The broodstocks were fed the experimental diets for 60 days before the onset of the breeding season and 75 days during the breeding season (from early March to mid-May). The experimental diets were provided to the broodstock twice daily (at 9:00 AM and 3:00 PM) until satiety was achieved. Spawning occurred naturally at the water temperature of 19°C. To collect the released eggs, the water inflow was shut off at 6:00 PM, and floating eggs were collected the following morning at 8:00 AM using a funnel net (300 micrometers). The formulas referenced by Safari et al. (2021) were then used to calculate spawning rates, fertilization rates, and other reproductive performance indicators. The Kolmogorov-Smirnov and Levene tests were employed to assess the normality and homogeneity of variance in the data. A one-way analysis of variance (ANOVA) followed by Duncan's multiple range test was conducted to evaluate the effects of dietary vitamin E on reproductive responses. Additionally, orthogonal polynomial regression analysis was used to examine the relationship between reproductive factors and the dosage of vitamin E in the diet.
Results
The inclusion of varying vitamin E concentrations in the diet did not significantly affect the female broodstock's final weight, condition factor, hepatosomatic index, viscerosomatic index, or gonadosomatic index. Broodstock fed a diet containing 250 mg of vitamin E per kg exhibited the highest relative fecundity. The duration of spawning in broodstock fed diets containing 100 and 250 mg of vitamin E per kg was significantly longer compared to other treatments (P < 0.05). The highest fertilization rate was observed in fish fed the diet supplemented with 250 mg of vitamin E per kg, while the control group exhibited the lowest fertilization percentage. Furthermore, the highest hatching rate and survival rate of three-day-old larvae were recorded in the group receiving 250 mg of vitamin E per kg. The lowest incidence of abnormalities during embryonic development occurred in the group fed a diet containing 50 mg of vitamin E per kg. The relationship between fertilization percentage, hatching rate, and larval survival indices with dietary vitamin E concentration followed a quadratic pattern.
Discussion and conclusion
The findings indicate that vitamin E supplementation did not significantly affect the growth indices of the broodstock. This lack of impact may be attributed to the allocation of energy and nutrients toward gonadal development, maturation, and gamete production, which likely reduced the energy available for somatic growth during the breeding season (Safari et al., 2021). Vitamin E plays a critical role in the synthesis of sex hormones in animals and has been shown to promote the accumulation of yolk granules in the ovaries as well as gonadal development in fish (Zhang et al., 2007). In the present study, the inclusion of 250 mg of vitamin E in the diet of female A. arabicus resulted in enhanced fecundity, prolonged spawning duration, improved fertilization and hatching rates, reduced embryonic abnormalities, and increased larval survival. Similarly, the addition of 200 mg of vitamin E to the diet of the swamp eel (Monopterus albus) has been reported to promote gonadal development, increase spawning activity, and enhance hatching rates (Zhang et al., 2007). Furthermore, a study on a cichlid species (Pseudotropheus socolofi) demonstrated that incorporating vitamin E at a concentration of 219.3 mg per kg significantly increased egg diameter, fecundity, spawning frequency, fertilization rates, hatching success, and larval survival (Erdogan and Arslan, 2019). Studies indicate that vitamin E can regulate reproductive hormone levels and the expression of related genes during different developmental stages in fish (Zhang et al., 2021). Vitamin E is a fat-soluble compound essential for fish health and reproduction, acting as a structural element in cell membranes with antioxidant properties (Griesh et al., 2024). The results of the present study suggest that supplementing the diet with 250 mg of vitamin E improves reproductive efficiency and larval survival rate in the female Arabian yellowfin seabream (Acanthopagrus arabicus).
Conflicts of interest
I want to confirm that there are no known conflicts of interest for this manuscript.
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