Rajaei Sturgeon Fish Farm

Sari, Iran

Rajaei Sturgeon Fish Farm

Sari, Iran

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Ghomi M.R.,Islamic Azad University at Tonekabon | Nazari R.M.,Rajaei Sturgeon Fish Farm | Poorbagher H.,University of Tehran | Sohrabnejad M.,Tarbiat Modares University | And 4 more authors.
Comparative Clinical Pathology | Year: 2011

This study investigated the effect of manipulated photoperiod on haematological parameter in beluga sturgeon (Huso huso). One hundred eight fish (24-month old) were randomly allocated into 18 tanks. Each tank received one of six photoperiod regimes for 73 days: natural photoperiod, 24Light (L):0Dark (D), 16L:8D, 12L:12D, 8L:16D and 0L:24D. Different photoperiods had no significant effects on hormonal and cytological features of blood in young beluga sturgeon. © 2010 Springer-Verlag London Limited.


Ghomi M.R.,Islamic Azad University at Tonekabon | Heshmatipour Z.,Islamic Azad University at Tonekabon | Nazari R.M.,Rajaei Sturgeon Fish Farm | Sohrabnejad M.,Tarbiat Modares University | And 5 more authors.
Bulgarian Journal of Agricultural Science | Year: 2010

The purpose of this study was to evaluate the effect of dietary probiotic and vitamin C on intestinal microflora of kutum Rutilus frisii kutum juveniles. The juveniles were fed to apparent satiation the diet supplemented with probiotic Primalac® (0, 0.1 and 0.3%), vitamin C (0, 200 and 400 mg kg-1) or their combination for 8 weeks. Result indicated that fish fed with the control diets without supplementation exhibited statistically (P<0.05) higher mortality than other treatments. On the basis of carbohydrate utilization profiles using API 50 CHL kits (fermentation pattern), the intestinal detected strains were divided into the three groups (Lactobacillus brevis, L. plantarum, and L. lactis). With increasing the culture period, number of total bacterial counts and lactic acid bacteria increased.


Nazari R.M.,Rajaei Sturgeon Fish Farm | Modanloo M.,University of Tehran | Ghomi M.R.,Islamic Azad University at Tonekabon | Ovissipor M.R.,Gorgan University of Agricultural Sciences and Natural Resources
Aquaculture International | Year: 2010

For studying the effect of LHRH-A2 hormone on the induction of final maturation and ovulation of Persian sturgeon, 71 matured females and 20 matured males were used. Five groups of breeders were injected with sturgeon pituitary gland hormone (50 mg per fish) and LHRH-A2 in dosages of 3.5, 7, 8 and 10 μg kg-1 for females and 3 and 5 μg kg-1 for males. Results showed that LHRH-A2 successfully induced final maturation and ovulation in females, and there was no significant difference between five groups of breeders in ovulation proportion, fertilization rate, survival rate of incubation, survival of yolk-sac absorption period and active feeding period of larvae. It can be concluded that the LHRH-A2 is a proper alternative for pituitary gland hormone in artificial propagation of Persian sturgeon. © 2009 Springer Science+Business Media B.V.


Ghomi M.R.,Islamic Azad University at Tonekabon | Nazari R.M.,Rajaei Sturgeon Fish Farm | Sohrabnejad M.,Tarbiat Modares University | Ovissipour M.,Gorgan University of Agricultural Sciences and Natural Resources | And 6 more authors.
African Journal of Biotechnology | Year: 2010

The beluga sturgeon is considered as the most important species for caviar production. This study aimed to evaluate effects of photoperiod manipulation on growth factors of beluga sturgeon. The six photoperiod regimes (light: dark cycle) including natural photoperiod (control), 24L: 0D, 16L: 8D, 12L: 12D, 8L: 16D and 0L: 24D with the three replicates. The treatment 5 (8L: 16D) gained the greatest final weight (2194.4 g) after 73 rearing days and besides, the treatments 4, 3 and 1 (12L: 12D, 16L: 8D, and Control) can be considered as the good photoperiod regimes for beluga sturgeon. The continuous light (24L: 0D) and continuous dark (0L: 24D) significantly (P < 0.05) reduced the final weight of fish to 1804.2 g and 1976.1 g, respectively. Regulated photoperiod significantly improve growth rate and food conversion ratio of beluga sturgeon. © 2010 Academic Journals.


Nazari R.M.,Rajaei Sturgeon Fish Farm | Ghomi M.R.,Islamic Azad University at Tonekabon
Italian Journal of Zoology | Year: 2010

The reproductive biology of fish has been a field of wide interest. The aim of this study was to determine the correlations between sex steroid hormones and maternal characteristics and larvae in the Persian sturgeon Acipenser persicus. The blood samples were derived from 22 female specimens in reproductive stage IV (migration of nucleus) for measuring testosterone (T), 17β-estradiol (E2), and progesterone (P4). As a result, T demonstrated a significant correlation with E2 (r = 0.44) and P4 showed a significant relationship (P < 0.05) only with the larval survival rate after the feeding stage (r = 0.52), but other variables did not demonstrate any significant correlation with one another. There was not a significant relationship in female Persian sturgeon between steroid hormones and size. © 2010 Unione Zoologica Italiana.


Ghomi M.,Islamic Azad University at Tonekabon | Zarei M.,Rajaei Sturgeon Fish Farm | Sohrabnejad M.,Tarbiat Modares University
Acta Biologica Hungarica | Year: 2011

Because of the effect of photoperiod on physiological and biochemical processes in fish, this study aimed to evaluate the effect of manipulated photoperiod on growth, feed conversion and survival of wild carp, Cyprinus carpio. Fish received six photoperiod regimes (light:dark cycle) including: natural photoperiod (control), 24L:0D, 16L:8D, 12L:12D, 8L:16D and 0L:24D by the three replications. Regulated photoperiods as a 16L:8D or 12L:12D light/dark cycle significantly improved growth rate and food conversion ratio of wild carp. © 2011 Akadé miai Kiadó, Budapest.


Aramli M.S.,Tarbiat Modares University | Kalbassi M.R.,Tarbiat Modares University | Nazari R.M.,Rajaei sturgeon Fish Farm
Journal of Aquaculture Research and Development | Year: 2013

Gonadotropin-releasing hormone agonists (GnRHa or LHRHa) have been used extensively in order to stimulate the release of pituitary luteinizing hormone (LH) required to induce sexual maturation (e.g., spermiation). In this research, blood serum testosterone (T), 11-ketotestosterone (11-K) and progesterone (P4) levels were measured in Persian sturgeon, Asipenser persicus (Borodin, 1897), males during propagation season. The type and dose of hormone administration for artificial propagation were LH-RH-A2 and 5 μg kg-1, respectively. In males which responded by spermiating, serum steroids levels (T, 11-K and P4) were higher than in non spermiating males. Following hormonal stimulation, levels of all three steroids increased signifcantly in spermiting males 14h after LHRH- A2 injection. T levels increased slightly in non spermiting males and other steroids did not change during the spermiation process. The rise of T levels in both males show that this steroid as a dominant and key androgen related with maturation in Persian sturgeon. © 2013 Aramli MS, et al.


Ebrahimi G.,Sari University of Agricultural Sciences and Natural Resources | Ouraji H.,Sari University of Agricultural Sciences and Natural Resources | Firouzbakhsh F.,Sari University of Agricultural Sciences and Natural Resources | Makhdomi C.,Rajaei Sturgeon Fish Farm
Aquaculture Research | Year: 2013

A 3 × 5 factorial design including three lipid levels (100, 130 and 180 g kg-1 diet, based on dry matter) and five dietary protein levels (370, 420, 470, 520 and 570 g kg-1 diet, based on dry matter) was conducted to investigate the optimum dietary lipid and protein requirements for Rutilus frisii kutum fingerlings. Triplicate groups of 80 kutum (500 ± 60 mg initial weight) were stocked in 250-l tanks and fed to apparent satiation thrice daily for 8 weeks. The results showed that the growth performance and feed utilization were significantly (P < 0.05) affected by dietary protein and lipid levels. Weight gain, specific growth rate and feed conversion ratio of kutum improved significantly with increasing protein level from 370 to 470 g protein kg-1 diet, but there was a significant decrease in growth parameters with increasing protein level from 470 to 570 g protein kg-1 diet. Also, the higher values of weight gain, specific growth rate and better feed conversion ratio were observed for fish fed diets containing 130 g kg-1 lipid diet. The results of this study showed that diet containing 420 g kg-1 protein and 130 g kg-1 lipid with a P:E ratio of 19.22 mg protein kJ-1 of gross energy is optimal for kutum fingerlings. © 2012 John Wiley & Sons Ltd.

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