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Showing 6 results for Yellowfin Seabream
B Sarvi , A Matinfar, H Mahmoudzadeh , G.r Eskandary , Y Abdollah Tabar ,
Volume 19, Issue 1 (4-2010)
Abstract
Feeding behavior of yellowfin seabream larvae during the first two weeks of larval life was studied by feeding larvae on different ratios of live food and microencapsulated diet (MED). Food consumption rate increased progressively with increasing larval weight. The results from visual observation of the larval guts under a light microscope indicated that yellowfin seabream larvae were able to ingest and digest MED from the onset of exogenous feeding.
Comparing the average number of rotifers and MED ingested by larvae in treatments including either only live food or MED did not show any significant differences (P>0.05). In addition, the gut contents examination from the larvae fed simultaneously on both rotifer and MED, revealed that the larvae's tendency towards live food and/or MED was a function of live food density in the rearing tanks. The larvae preferentially ingest live food even when these are present at a very low concentration in comparison to MED. The mouth diameter of larvae has a strong influence on the amount of ingested rotifers and MED.
There was a significant positive correlation between larvae growth and the average number of both live food and MED ingested by larvae in this trial (P<0.01). Although larvae survival rate had a positive correlation with the number of rotifers ingested, the amount of MEDin the larvae's gut did not show effect on larvae survival rate (P>0.05).
D. Alipoor, M. Javaheri Baboli, L. Roomiani,
Volume 26, Issue 2 (7-2017)
Abstract
The aim of this study was to evaluate the effect of cooking on the content of minerals and vitamins yellow fin seabream fillets on the baking process. In this study fillets of yellow fin seabream (Acanthopagrus latus) with three methods include steaming, frying and grilling the (grill a) the amount of vitamins (a and E) and minerals (iron, phosphorus, copper, zinc, calcium, magnesium, potassium, sodium) was conducted with a sample of crude compared Grdyd.bray measured amounts of vitamin and mineral content Vitamins high performance liquid chromatography (HPLC) method for measuring atomic absorption spectrophotometry was used minerals. The comparison of all the minerals in samples cooked with raw samples, showed no significant changes (p˂0 /05).The content of vitamin A in the cooked samples, compared to the raw samples decreased significantly (p˂0 /05).the lowest amount of vitamin A were observed in fried samples (66/0 ± 6/7 mg/100gr wet weight ) (p˂0 /05). The content of vitamin E in all cooked samples, compared to the raw samples decreased significantly (p˂0 /05)and the lowest levels of vitamin E was observed in grilled samples (02/0 ± 293/0 mg/100gr wet weight). The results showed that three cooking methods including steamin and grilling and frying caused a insignificant change in mineral content but effect of these three methods of cooking on the content of vitamin a and E in fish fillets yellowfin seabream (Acanthopagrus latus) was different.
S. Khoramian, P. Kochanian, V. Yavari, A.p. Salati,
Volume 28, Issue 5 (12-2019)
Abstract
Arabian yellowfin sea bream (Acanthopagrus arabicus) is a candidate for cage culture. In this study to improve spawning performance (in quality and quantity) the effects of using human chorionic gonadotropin (HCG), Luteinizing hormone-releasing hormone analogues (LHRH-A2), carp pituitary extract (CPE) and a combination of CPE plus LHRH-A2 in females were investigated. The hormone treatments and control were tested in triplicates. Each replicate was stocked with 30 fish with a sex ratio of 1:1 and the average weights were 675g and 310g for females and males, respectively. In each trial, females were injected twice with the same dose in 24 hours between of either. Spawning occurred in all tanks and the use of all hormones successfully induced spawning in a shorter time. Relative fecundity was found to be significantly elevated in the mix treatment (p<0.05). Fish in the control group and HCG treatment showed the lowest relative fecundity. Buoyant egg percentage was not significantly affected by different hormones. Results of survival rate percentage in 10 and 35 DPH did not show any significant different between treatments and control group (p>0.05). Starvation challenge was designed for 3 DPH larvae. Survival rate of larvae in 12, 24, 36, 48, 60, 72 hours after starting challenge did not differ significantly among treatments (p>0.05). The present study revealed the best spawning performance of A. arabicus was achieved at a combination of CPE plus LHRH-A2, This hormone combination increases the quantity of produced eggs without affecting their quality.
B. Sarvi, Gh.r. Rafiee, J. Ghofleh Marammazi, M. Zabayeh Najafabadi, S.h. Seyedalhosseini,
Volume 28, Issue 5 (12-2019)
Abstract
In this study reproductive biology of brood stock and larvae rearing technique of Acanthopagrus latus was investigated. Also, different development stages of the egg and larvae in a period of 42 days are described. The diameters of fertilized eggs were 0.77-0.85 mm. The eggs hatched in 32 h between 19-21◦C. The newly hatched out larvae had mean body weight of 84.6 µg and total length of 1.76-1.87 mm. At the end of this study period, yellowfin seabream larval reached to 5170 µg mean body weight and standard length of 12.1-12.6 mm. Gulping the air and swim bladder inflation occurred during first week of larval life, especially as from the sixth day after hatching. In the current study larvae were able to ingest and digest rotifer, Artemia nauplii and microparticulate diet successfully. High mortality of larvae was observed between days 20 and 30 after hatching. Average survival rate of larvae was around %43, when the study finished at day 42 after hatching. The techniques used in this research to deal with yellowfin seabream brood stock and larvae were found to be suitable and led to successful spawning and larval’s metamorphosis into fry in captive condition.
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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