Iranian Fisheries Research Organization IFRO

Tehrān, Iran

Iranian Fisheries Research Organization IFRO

Tehrān, Iran
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Ghaedi A.,Iranian Fisheries Research Organization Ifro | Kabir M.A.,Sylhet Agricultural University | Hashim R.,Universiti Sains Malaysia
Aquaculture Research | Year: 2016

Present study aimed to determine the optimum dietary lipid level in snakehead murrel channa striatus broodstocks. Triplicate groups of fish were fed for 240 days with isonitrogenous experimental diets with increasing lipid levels (100, 140, and 180 g kg-1), using fish oil and soybean oil as the lipid sources with the ratio of (1:1). Weight gain, GSI, fecundity, oocyte diameter and number of mature oocyte were found to be significantly higher in the group fed with diet containing 180 g kg-1 lipid level. Muscle fatty acid profile showed a significant increase in LA (18:2n-6), LNA (18:3n3), total PUFA, n-6 and ArA (20:4n-6) in fish fed with diet containing 180 g kg-1 lipid. Increasing lipid level up to 180 g kg-1 resulted in significant increase in PUFA (LA & LNA), lc-PUFA (EPA, DHA, ArA), total PUFA, n-3 and n-6 series in ovary and liver of female C. striatus. © 2016 John Wiley & Sons Ltd.

Abedi S.,Tarbiat Modares University | Sharifpour I.,Iranian Fisheries Research Organization IFRO | Mozanzadeh M.T.,Iran University of Science and Technology | Zorriehzahra J.,Iranian Fisheries Research Organization IFRO | Khodabandeh S.,Tarbiat Modares University
Journal of Photochemistry and Photobiology B: Biology | Year: 2015

The current study was conducted to evaluate the effects of UV-B radiation on survival rate and histopathological changes in the skin structure and ultrastructure in rainbow trout (Oncorhynchus mykiss) alevins. In laboratory dark conditions, newly hatched rainbow trout alevins were exposed to two different doses of UV-B radiation (high dose: HD: 94.83 μW cm-2) and (low dose: LD: 68.75 μW cm-2) for 9 days (time of exposure: 15 min per day), whereas specimens kept in darkness served as a control group. At the end of the experiment, alevins exposed to HD-UVB had the lowest survival rate (43.9 ± 0.9%), whereas fish exposed to LD-UVB showed intermediate values (73.6 ± 0.4%) with regard to the control group (91.2 ± 0.2%). Light microscopic and scanning electron microscopic studies revealed necrosis, sunburned cells, epidermis lifting of the epidermis, reduced number of mucous cells, degeneration of mucous cells and destruction of pavement cell microridges in both UV-B exposed groups. Hemorrhage and inflation in the meningeal layer of the brain were also observed in 17% and 42% of fish exposed to LD- and HD-UVB, respectively. ©2015 Elsevier B.V. All rights reserved.

Sadighzadeh Z.,Islamic Azad University at Tehran | Valinassab T.,Iranian Fisheries Research Organization IFRO | Vosugi G.,Islamic Azad University at Tehran | Motallebi A.A.,Iranian Fisheries Research Organization IFRO | And 3 more authors.
Fisheries Research | Year: 2014

The otoliths of John's snapper (Lutjanus johnii) from the Persian Gulf and the Oman Sea were studied to evaluate whether otolith shape can be used to differentiate populations. John's snapper is a relevant commercially exploited species in the Arabian Sea, and the identification of different stocks is a major issue for fishery management. Otolith weight was used to examine the growth rate of both populations and as an indicator of similar ambient water composition. Otolith contours were obtained using wavelet functions, from the finest (WLT 1) to coarsest (WLT 9) scales, and then compared by principal components (PCA) using a canonical discriminant analysis (CDA) for each scale. No significant differences were noted in the otolith weight between the two populations (ANCOVA, P>. 0.05). The variability of the finest scales (WLT 1-3) was very high and showed a low percentage of classification (61%). The intermediate scales (WLT 4-6), and WLT 8 provided the best results; whilst the highest classification percentage was found in WLT 4 and WLT 8 (76% and 77%, respectively). The results of this study enable us to conclude that both populations should be considered separate stocks. © 2014 .

Hoseinifar S.H.,Gorgan University of Agricultural Sciences and Natural Resources | Khalili M.,Islamic Azad University | Khoshbavar Rostami H.,Iranian Fisheries Research Organization IFRO | Esteban M.T.,University of Murcia
Fish and Shellfish Immunology | Year: 2013

The aim of this study was to assess the effects of galactooligosaccharide (GOS), on the growth performance, stress resistance and intestinal microbiota of Caspian roach ( Rutilus rutilus) fry. Specimens (1.36±0.03g) were fed either a basal control diet (0% GOS, non-supplemented) or the basal diet supplemented with 1% and 2% of GOS. After 7 weeks of the feeding trials, growth factors (final weight, weight gain, specific growth rate, condition factor and food conversion ratio) as well as body composition, resistance to salinity stress and autochthonous intestinal microbiota were assessed. Results demonstrated that at the end of the trial growth factors (final weight, weight gain, SGR, FCR) were significantly higher in 2% GOS fed fish ( P<0.05). In addition, supplementation of GOS significantly increased both survival rate ( P<0.05), and resistance to a salinity stress challenge of prebiotic fed groups ( P<0.05). However, body composition and the total autochthonous intestinal heterotrophic bacteria counts remained unaffected in different treatments ( P>0.05). Nevertheless, autochthonous lactic acid bacteria levels were significantly elevated in fish fed 2% dietary GOS ( P<0.05). These results confirm that GOS improves growth performance, stress resistance and modulates intestinal microbiota by increasing lactic acid bacteria of Caspian roach fry, a very important fish species in the Caspian Sea. © 2013 Elsevier Ltd.

Sadighzadeh Z.,Islamic Azad University at Tehran | Tuset V.M.,CSIC - Institute of Marine Sciences | Valinassab T.,Iranian Fisheries Research Organization IFRO | Dadpour M.R.,University of Tabriz | Lombarte A.,CSIC - Institute of Marine Sciences
Marine Biology Research | Year: 2012

The anatomical and morphometric (shape indices, contour descriptors and otolith weight) characterizations of sagittal otoliths were investigated in 11 species of Lutjanus spp. inhabiting the Persian Gulf. This is the first study that compares the efficiency of three different image analysis techniques for discriminating species based on the shape of the outer otolith contour, including elliptical Fourier descriptors (EFD), fast Fourier transform (FFT) and wavelet transform (WT). Sagittal otoliths of snappers are morphologically similar with some small specific variations. The use of otolith contour based on wavelets (WT) provided the best results in comparison with the two other methods based on Fourier descriptors, but only the combination of the all three methods (EFD, FFT and WT) was useful to obtain a robust classification of species. The species prediction improved when otolith weight was included. In relation to the shape indices, only the aspect ratio provided a clear grouping of species. © 2012 Copyright Taylor and Francis Group, LLC.

Hoseinifar S.H.,University of Tehran | Mirvaghefi A.,University of Tehran | Mojazi Amiri B.,University of Tehran | Rostami H.K.,Iranian fisheries research organization IFRO | Merrifield D.L.,University of Plymouth
Aquaculture Nutrition | Year: 2011

Preliminary experiments were undertaken to investigate the effects of oligofructose on beluga sturgeon (Huso huso) growth performance, survival and culturable autochthonous intestinal microbiota. Juveniles (20g) were fed diets containing varying levels of oligofructose (10, 20 and 30gkg-1) at 2-3% body weight per day for 7weeks. Compared to the control group, no significant (P>0.05) effect on growth performance was observed in fish fed diets supplemented with oligofructose at 10 and 20gkg-1. However, compared to the 20gkg-1 group, feeding oligofructose at 30gkg-1 resulted in adverse effects on growth performance. Dietary supplementation of oligofructose at 20gkg-1 significantly increased survival rate. Microbiological assessment indicated that the viable culturable autochthonous levels were not affected by dietary oligofructose. Although lactic acid bacteria (LAB) were not a dominant component of the endogenous autochthonous microbiota, LAB levels were significantly elevated in fish fed 20gkg-1 dietary oligofructose. This elevated LAB population was able to persist for at least 1week after reverting the prebiotic group back to a control diet. This study encourages further research on different aspects of oligofructose in sturgeon culture with clear emphasis on optimizing dosage levels. © 2011 Blackwell Publishing Ltd.

Hoseinifar S.H.,University of Tehran | Mirvaghefi A.,University of Tehran | Merrifield D.L.,University of Plymouth | Amiri B.M.,University of Tehran | And 2 more authors.
Fish Physiology and Biochemistry | Year: 2011

A study was conducted to investigate the effects of dietary oligofructose (1, 2 and 3%) on the blood profiles of beluga (Huso huso) juveniles (18.77 ± 0.76 g) compared to fish fed an un-supplemented diet. After 7 weeks of feeding on the experimental diets, haematological parameters, metabolic products (cholesterol, glucose and total protein) and serum enzymes (lactate dehydrogenase, alkaline phosphatase, alanine aminotransferase and aspartate aminotransferase) were measured. Compared to the control group (0% oligofructose), dietary oligofructose had no effect on red blood cell counts (RBC), mean corpuscular volume (MCV), mean cellular haemoglobin (MCH) or mean cell haemoglobin concentration (MCHC) (P>0.05). However, haemoglobin (Hb) concentration, leucocyte (WBC) levels and the proportion of lymphocytes were significantly higher (P>0.05) in the 2% oligofructose fed fish than in the 3% oligofructose fed fish. Additionally, haematocrit (Hct) values (P = 0.049) and the proportion of lymphocytes (P ≤ 0.01) were significantly higher in the 2% oligofructose group than in the control group. Although serum glucose and total protein remained unaffected, serum cholesterol was significantly lower in the 2% oligofructose group than in the control and 3% oligofructose group (P<0.05). The results of the present study showed that oligofructose had no significant effects on serum lactate dehydrogenase, alkaline phosphatase, alanine aminotransferase and aspartate aminotransferase. These results indicate that fish blood profiles could be affected by prebiotics, which should be taken into account in future studies. © 2010 Springer Science+Business Media B.V.

Katuli K.K.,University of Tehran | Amiri B.M.,University of Tehran | Massarsky A.,University of Ottawa | Yelghi S.,Iranian Fisheries Research Organization IFRO
Chemosphere | Year: 2014

The stocks of Caspian roach (Rutilus rutilus), an economically important species in the Caspian Sea, are depleting. Each year millions of artificially produced fingerlings of this species are restocked in the mouth of rivers of the Southern Caspian Sea (e.g. Qare Soo River), where they are exposed to pesticides originating from regional rice and orchard fields. This early exposure to pesticides could affect the hypo-osmoregulatory ability of juvenile fish. Thus, in this study, Caspian roach fingerlings were exposed to environmentally-relevant concentrations of the organophosphate insecticide diazinon for 96h in fresh water and then transferred to diazinon-free brackish water (BW) for another 96h. We report that cortisol and glucose levels were significantly increased in all diazinon treatments at all sampling time points in comparison to the control group. Moreover, the thyroid hormone levels of TSH, T4, and T3 significantly decreased in diazinon-exposed fish even after the transfer to BW. The electrolytes were differentially affected during the exposure to diazinon and after the transfer to BW. The number of chloride cells in the gill tissue was significantly increased during diazinon exposure at the higher concentrations and decreased to control levels after transfer to BW. Finally, gill and kidney tissues showed many histopathological changes in diazinon-exposed fish even after 240h in BW. These results suggest that the release of Caspian roach fingerlings into the diazinon-contaminated Caspian Sea regions may alter their physiology and jeopardize their survival, which could lead to a failure in rebuilding the Caspian roach stocks in the Caspian Sea. © 2014 Elsevier Ltd.

Aein Jamshid Kh.,Iranian Fisheries Research Organization IFRO | Mohsenizadeh F.,Iranian Fisheries Research Organization IFRO | Omidi S.,Iranian Fisheries Research Organization IFRO
Iranian Journal of Fisheries Sciences | Year: 2016

The aim of this work was to be informed and aware of the red tide conditions before the entering of algal blooms in seawater supply canals of the shrimp farm and hatchery complexes in Bushehr Province. Field investigations and monthly samplings have been carried out to determine environmental parameters, nutrients, chlorophyll-a and phytoplankton in the southern part of the input water channels of Mond, Delvar and Heleh farmed shrimp complexes from April to December 2011. The identified phytoplankton belonged to three classes of Bacillariophyceae, Dinophyceae and Cyanophyceae. 12 genera belonging to Dinophyceae, 25 genera to Bacillariophyceae and two genera to Cyanophyceae were observed during the study. The highest average density of total phytoplankton was recorded at Heleh station at 18374 cells/Lit. The maximum density of phytoplankton was at Delvar station in December. The highest density of Dinophyceae was observed in August. Alexandrium sp., Ornithocercus and Prorocentrum sp. were the predominant species of Dinophyceae class. Bacillariophyceaes are thermo-tolerant and halo-tolerant while Dinophyceaes and Cyanophyceaes are thermo-intolerant and halo-intolerant. Bacillariophyceaes are silica limited while Dinophyceaes are phosphorus limited phytoplankton.

Moradi Y.,Iranian Fisheries Research Organization IFRO | Bakar J.,University Putra Malaysia | Motalebi A.A.,Iranian Fisheries Research Organization IFRO | Syed Muhamad S.H.,University Putra Malaysia | Che Man Y.,University Putra Malaysia
Journal of Aquatic Food Product Technology | Year: 2011

Fish lipids are known to be beneficial for human health since they are rich in eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA). This benefit can be affected by some processing or cooking methods. The effects of different cooking methods on lipid content and fatty acid composition of different fish species have been previously studied. In this article, the fish lipid characteristics and their changes during different cooking methods were reviewed. The fat content and fatty acid composition of fish vary according to the species, season, and environmental conditions. The fish lipid characteristics also change during different cooking processes. Frying generally gives higher changes in the fish lipid composition than other cooking methods. For example, frying results in higher losses of DHA and EPA (compared to other cooking methods). Further, the lipid changes occurring during frying depend on the fat content of the fish, the frying oil composition, and the type of frying technology. Copyright © Taylor & Francis Group, LLC.

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