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Koohilai S.,Islamic Azad University at Tehran | Oryan S.,Kharazmi University | Hosseinzadeh Sahafi H.,Iranian Fisheries Research Institute | Ghavam Mostafavi P.,Islamic Azad University at Tehran | Behzadi S.,Islamic Azad University at Roudehen
Aquaculture Research | Year: 2016

The acceleration of final oocyte maturation and ovulation is recognized as a principal process in Caspian kutum Rutilus frisii kutum, a commercial and valuable species in Caspian Sea. The aim of this study was to evaluate the effects of catecholaminergic pharmaceutics which include Salbutamol (β2-adrenergic receptor agonist), Metoprolol (β1-adrenergic receptor antagonist), Clozapine and Olanzapine (the third generation of D4 and D2 dopamine receptor antagonists) which can be more efficient than the first and second generations, in combination with Buserelin ([D-Ser(tBu)6,Pro9-NEt]-GnRHa) and Ovaprim (D-Ala6,Pro9-Net)-sGnRH+Domperidone on ovulation and spawning induction in Caspian kutum. One hundred eight adult females were injected once with Buserelin Acetate (BUS) 5 μg kg-1 BW, Ovaprim 0.5 mL kg-1 BW, Salbutamol Sulphate (SLB) 4 mg kg-1 BW, Olanzapine (OLZ) 5 mg kg-1 BW, Clozapine (CZ) 12 mg kg-1 BW and Metoprolol Tartrate (MTP) 5 mg kg-1 BW, being divided into 12 groups: group 1, intact (negative control); group 2, Ovaprim (positive control); group 3, OLZ+SLB; group 4, OLZ+MTP; group 5, OLZ+BUS; group 6, CZ+SLB; group 7, CZ+MTP; group 8, CZ+BUS; group 9, OLZ+BUS+SLB; group 10, OLZ+BUS+MTP; group 11, CZ+BUS+SLB and group 12, CZ+BUS+MTP (N = 9). The results showed that the highest mean value in ovulation success, ovulation index, fertilization success, relative fecundity and the number of eggs belonged to Ovaprim treatment. On the other hand, spawning was successful in OLZ+BUS+SLB and CZ+BUS treatments (P < 0.05), whereas it was lower in CZ+MTP, CZ+BUS+MTP and OLZ+BUS than the other treatments. Therefore, it could be concluded that Clozapine and Olanzapine potentiated the effect of Buserelin treatment in ovulation and spawning induction, while Metoprolol blocked the stimulatory effects of GnRHa, Clozapine and Olanzapine. Salbutamol also can amplify stimulatory effect of all mentioned pharmaceutics. © 2016 John Wiley & Sons Ltd.

Gharekhani A.,Islamic Azad University at Tehran | Azari Takami G.,Islamic Azad University at Tehran | Tukmechi A.,Urmia University | Afsharnasab M.,Iranian Fisheries Research Institute | Agh N.,Urmia University
Iranian Journal of Veterinary Research | Year: 2015

Zinc (Zn) is an essential trace element in all living organisms, and the first eukaryotic Zn uptake transporter was discovered in the yeast, Saccharomyces cerevisiae. Zinc-enriched yeast is a currently available Zn supplement. The purpose of the investigation was to compare and evaluate the effect of Zn enriched yeast in rainbow trout. The fish (mean body weight 10 ± 0.5 g) were fed a commercial diet supplemented with 0 (control), 1 × 106, 1 × 107 and 1 × 108 CFU/g of Zn-enriched yeast for 60-days. Results showed that significant increase in serum lysozyme activity, complement activity and total immunoglobulin were seen in all treatment groups during feeding trial when compared to the control group. On the basis of our findings, Zn-enriched improved rainbow trout growth, some immune parameters and disease resistance.

Ghaeni M.,Islamic Azad University at Tehran | Matinfar A.,Iranian Fisheries Research Institute | Soltani M.,University of Tehran | Rabbani M.,Islamic Azad University at Tehran | Vosoughi A.,Islamic Azad University at Tehran
Iranian Journal of Fisheries Sciences | Year: 2011

This experiment was carried out in Bandargah Station in Bushehr province. Peneaus semisulcatus larvae were fed on Spirulina platensis as supplementation microalgae. In order to use spirulina platensis in this study, we have to produce biomass and dry production of this microalga. Determination of length and survival rate of Peneaus semisulcatus larvae was carried out as the objective of the study. Treatments including Z plus (as a supplementation without spirulina), M.C.F (as an imported enriched spirulina), the powder combination of Spirulina platensis with Z plus and Spirulina platensis as live food were compared to Cheatocerus microalgae as a control. The experiment was carried out from nauplii stage to early post larvae. The results of the experiment indicated that the powder combination of Spirulina platensis with Z plus treatment has the most survival rate (76.5%). The maximum of length (4.3mm) observed in control (Cheatocerus spp.).The maximum mortality was observed in zoa stage in spirulina microalgae treatment, because the spiral filamentous of spirulina sp.was large.

Mousavi Sabet H.,Islamic Azad University at Tehran | Kamali A.,Islamic Azad University at Tehran | Soltani M.,University of Tehran | Bani A.,Guilan University | And 4 more authors.
Acta Ichthyologica et Piscatoria | Year: 2011

Background. Loach fishes, Cobitis sp., are found in the majority of streams in the southern Caspian Sea basin, but reproductive parameters of them are barely known. Reproductive conditions are key parameters of fish populations and their assessment is very important for several reasons. Therefore, the main aim of this study was to obtain reproductive characteristics of this fish which will be a first report for the basin. Materials and methods. Sampling was done at monthly intervals throughout the year and 226 individuals of Cobitis sp., were caught from the Babolrud River in the southern Caspian Sea basin, north of Iran. Age, sex ratio, fecundity, oocytes diameter, gonadosomatic- and modified gonadosomatic indices were estimated. Regression analyses were used to find relations between fecundity and fish size (length and weight), gonad weight, and age. Results. Sex ratio differed significantly from unity, and the percentage of females was greater than that of males. The mature females and males were longer than 45 and 35 mm in total length (+2 and +1 in age, respectively). The average egg diameter was 0.58 mm. The spawning took place from beginning of May to late July, when water temperature was between 19.1 and 24.6°C. Average GSI value at the beginning of the reproduction period was 8.93% and ranged between 4% and 26% in ripe, mature females. The average of absolute and relative fecundity was calculated 2172 and 590, respectively. The absolute fecundity was significantly related to body weight and gonad weight. Conclusion. Based on the pattern of gonadosomatic index, it was concluded that this fish has a prolonged active reproductive period. Their reproduction in this basin shows some differences from other reports, which might be related to different environmental conditions.

Hosseini M.,Islamic Azad University at Tehran | Porur S.R.,Iranian National Institute for Oceanography | Baniamam M.,Iranian Fisheries Research Institute | Amiri A.M.D.,Islamic Azad University at Ahvaz
Indian Journal of Geo-Marine Sciences | Year: 2015

Levels of mercury in tissues of Penaeus merguiensis from the Persian Gulf, was investigated. This study assessed the relationship between mercury levels in hepatopancreasn tissue, muscle and gonads with sex and season. Mercury content varied with type of size and sex. Results showed that hepatopancreas accumulate higher levels of the mercury in comparison to muscle and gonads. There was significant difference (p<0.05) in mercury levels between P. merguiensis sexes, higher mercury levels found in female than in males. There was significant difference (p<0.05) in mercury levels between different seasons, higher mercury levels found in July (summer season). The variation in mercury levels among the tissues is likely to have resulted from metal bioavailability, changes in tissue composition, organism size, sex and season. © 2015, National Institute of Science Communication and Information Resources (NISCAIR). All Rights reserved.

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