International Sturgeon Research Institute

Rasht, Iran

International Sturgeon Research Institute

Rasht, Iran

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Tabarsa M.,Tarbiat Modares University | Rezaei M.,Tarbiat Modares University | Ramezanpour Z.,International Sturgeon Research Institute | Robert Waaland J.,University of Washington
Journal of Phycology | Year: 2012

This study was conducted to create a nutritional database on brown seaweeds and to popularize their consumption and utilization in Iran. The fatty acid contents, amino acids profiles, and certain mineral elements composition of some brown seaweeds, Padina pavonica (L.) Thivy, Dictyota dichotoma (Huds.) J. V. Lamour., and Colpomenia sinuosa (Mert. ex Roth) Derbés et Solier were determined. Total lipid content ranged from 1.46±0.38 to 2.94±0.94g · 100g -1dry weight (dwt), and the most abundant fatty acids were C16:0, C18:1, C20:4 ω6, and C20:5 ω3. The unsaturated fatty acids predominated in all species and had balanced sources of ω3 and ω6 acids. Highest total polyunsaturated fatty acid (PUFA) levels occurred in C. sinuosa. The protein content of D. dichotoma was 17.73±0.29g · 100g -1dwt, significantly higher than the other seaweeds examined. Among amino acids essential to human nutrition, methionine (Met; in D. dichotoma and P. pavonica) and lysine (Lys; in C. sinuosa) were present in high concentrations. The crude fiber content varied by 9.5±11.6g · 100g -1dwt in all species. Chemical analysis indicated that ash content was between 27.02±0.6 and 39.28±0.7g · 100g -1dwt, and that these seaweeds contained higher amounts of both macrominerals (7,308-9,160mg · 100g -1dwt; Na, K, Ca) and trace elements (263-1,594mg · 100g -1dwt; Fe, Ni, Mn, Cu, Co) than have been reported for edible land plants. C. sinuosa had the highest amount of Ca, Fe, and a considerable content of Na was measured in P. pavonica. © 2012 Phycological Society of America.


Shariati F.,Islamic Azad University at Tehran | Esaili Sari A.,Tarbiat Modares University | Mashinchian A.,Islamic Azad University at Tehran | Pourkazemi M.,International Sturgeon Research Institute
Biological Trace Element Research | Year: 2011

Metallothionein (MT) concentration in gills, liver, and kidney tissues of Persian sturgeon (Acipenser persicus) were determined following exposure to sublethal levels of waterborne cadmium (Cd) (50, 400, and 1,000 μg∈l-1) after 1, 2, 4, and 14 days. The increases of MT from background levels were 4.6-, 3-, and 2.8-fold for kidney, liver, and gills, respectively. The results showed that MT level change in the kidney is time and concentration dependent. Also, cortisol measurement revealed elevation at the day 1 of exposure and followed by MT increase in the liver. Cd concentrations in the cytosol of experimental tissues were measured, and the results indicated that Cd levels in the cytosol of liver, kidney, and gills increased 240.71-, 32.05-, and 40.16-fold, respectively, 14 days after exposure to 1,000 μg∈l-1 Cd. The accumulation of Cd in cytosol of tissues is in the order of liver∈>∈gills∈>∈kidney. Pearson correlation coefficients showed that the MT content in kidney is correlated with Cd concentration, the value of which is more than in liver and gills. Thus, kidney can be considered as a tissue indicator in A. persicus for waterborne Cd contamination. © 2010 Springer Science+Business Media, LLC.


Mashroofeh A.,Tarbiat Modares University | Bakhtiari A.R.,Tarbiat Modares University | Pourkazemi M.,International Sturgeon Research Institute | Rasouli S.,Amirkabir University of Technology
Chemosphere | Year: 2013

The accumulations of Cd, Pb and Zn were determined in edible and inedible tissues of Persian sturgeon (Acipenser persicus; n= 27), stellate sturgeon (Acipenser stellatus; n= 5) and beluga (Huso huso; n= 4) collected from coastal waters of the South Caspian Sea from March to April 2011. Concentrations of metals evaluated in the caviar, muscle, liver, kidney, gills, ovary and heart of the three species of sturgeons have been assessed using the flame and graphite furnace atomic absorption spectrophotometer. Concentrations of Zn, Pb and Cd in the edible and inedible tissues were apparently different among the three species of sturgeons. Especially, beluga heart showed the highest concentrations of Zn and Pb and Cd in Persian sturgeon liver. The analyzed metals were found in the caviar and muscle samples of Persian sturgeon and likewise muscle samples two other sturgeon species at mean concentrations under the permissible limits proposed by MAFF (2000). © 2012 Elsevier Ltd.


Bazari Moghaddam S.,International Sturgeon Research Institute
Life Science Journal | Year: 2013

This research was done on 60 Acipenser persicus spawners caught in the southwest coasts of the Caspian Sea (Guilan Province) from April through June 2009-2011 to identify the parasitical fauna and prevalence, intensity and dominance of these parasites. On capture biometry was performed on the spawners and all parameters were recorded. The spawners were examined for the presence of wounds and macroscopic parasites. The digestive tract, egg, liver, gall bladder of the fish were removed and transferred to the laboratory of Parasitology of the International Sturgeon Research Institute. Parasites found were removed and stored in 10% formalin solution for identification following methods used by Stoskope (1993). Standard statistical computations were carried out using SPSS and Excel. Four types of internal helminthes parasites were identified in A.persicus spawners caught in each year that include, Cucullanus sphaerocephalus Rudolphi 1809, Skrjabinopsolus semiarmatus Molin 1858, Eubothrium acipenserinum Cholodkovsky 1918 and Leptorhynchoides plagicephalus Westrumb 1821. It is evident from the results obtained that Cucullanus sphaerocephalus and Skrjabinopsolus semiaramtus showed the highest prevalence and highest mean infection intensity in the Persian sturgeon spawners under study. Sum of dominance of these two parasites in 2009, 2010 and 2011 was 98.5%, 97.7% and 97.16%, respectively. Statistical relationship between age of spawners with the number of parasites isolated from them was also determined.


Seyfabadi J.,Tarbiat Modares University | Ramezanpour Z.,International Sturgeon Research Institute | Khoeyi Z.A.,Tarbiat Modares University
Journal of Applied Phycology | Year: 2011

The effects of irradiance and photoperiod on growth rates, chlorophyll a, β-carotene, total protein, and fatty acid content of Chlorella vulgaris were determined. The maximum growth rate (1. 13 day-1) was at 100 μmol photons m-2 s-1 and 16:8-h light/dark photoperiod. Chlorophyll a and β-carotene contents significantly differed under different light regimes with chlorophyll a content lower at high irradiance and longer light duration, while β-carotene showed the inverse trend. The total protein and fatty acid content also significantly differed in different light regimes; the maximum percentage of protein (46%) was at 100 μmol photons m-2 s-1 and 16:8 h photoperiod, and minimum (33%) was at 37.5 μmol photons m-2 s-1 and 8:16 h photoperiod; the total saturated fatty acids increased, while monounsaturated and polyunsaturated fatty acids decreased with increasing irradiance and light duration. © 2010 Springer Science+Business Media B.V.


Mashroofeh A.,Environmental Forensic Laboratory | Bakhtiari A.R.,Environmental Forensic Laboratory | Pourkazemi M.,International Sturgeon Research Institute
Bulletin of Environmental Contamination and Toxicology | Year: 2012

Concentrations of Zn, Cu and Mn were examined in caviar and muscle of the Persian sturgeon (Acipenser persicus) collected from coastal waters of south Caspian Sea during March and April, 2011. Mean Zn, Cu and Mn concentrations in caviar samples were 21.48, 2.05 and 1.66 μg g-1 wet weight basis, respectively. The mean Zn, Cu and Mn concentrations in muscle tissues were 7.49, 1.00 and 0.34 μg g-1 wet weight basis, respectively. The mean concentrations of Zn and Cu in caviar and muscle samples were under the permissible limits proposed by the United Kingdom's Ministry of Agriculture, Fisheries and Food (2000). © Springer Science+Business Media New York 2012.


Dadras H.,Islamic Azad University at Lahijan | Khara H.,Islamic Azad University at Lahijan | Noveiri S.B.,International Sturgeon Research Institute
Comparative Clinical Pathology | Year: 2014

The objectives of the present study were to determine the relationships between sperm characteristics (density and pH) and fertilization capacity (hatching rate) for Persian sturgeon during their reproductive season. Eleven males were used in this study. The luteinizing hormone releasing hormone analog was used to induce spermiation following which semen samples were stripped. Statistical analysis revealed positive correlations between hatching rate and sperm pH (P < 0.05, r = 0.711) and between sperm pH and fertilization rate (P < 0.05, r = 0.633). Highly negative relationships were found between sperm density and hatching rate (P > 0.01, r = -0.745). We suggest that understanding these correlations is critical in the evaluation of sperm quality and for the composition of media (extender) to be used in the dilution of semen to improve sperm motility/fertility parameters of Persian sturgeon. © 2013 Springer-Verlag London.


Mashroofeh A.,Tarbiat Modares University | Bakhtiari A.R.,Tarbiat Modares University | Pourkazemi M.,International Sturgeon Research Institute
Journal of Mazandaran University of Medical Sciences | Year: 2013

Background and purpose: High concentrations of heavy metals have always been a major cause of contamination in aquatic ecosystem. Sturgeons are important sources of food and income throughout the world. In this study, concentrations of Cadmium, Vanadium, Nickel and Zink (Cd, Ni, V and Zn) were examined in edible and inedible tissues of stellate sturgeon (Acipenser stellatus) and beluga (Huso huso) collected from coastal waters of the South Caspian Sea in spring, 2011. Also, the human health risk due to consumption of muscle tissue of stellate sturgeon and beluga were evaluated. Materials and methods: Two species of sturgeons, beluga (n = 4), stellate sturgeon (n = 8), were collected from two of the most important sturgeon fishery zones in Guilan and Golestan provinces and stored at -20°C before chemical analysis. Concentrations of Zn were measured by atomic absorption spectrophotometer using an air/acetylene flame (Shimadzu, AA-670, Kyoto, Japan). Concentrations of Cd, Ni and V were determined by graphite furnace atomic absorption spectrometer (Shimadzu, AA-670G, Kyoto, Japan). Results: Stellate sturgeon liver showed the highest concentrations of Cd, Ni, V (1.70 ± 0.32, 0.87 ± 0.23 and 2.71 ± 1.44 μg/g dry weight, respectively) and highest concentrations of zinc (182.26 ± 51.87 μg/g dry weight) in beluga heart (P<0.05). The lowest concentrations of Zn and Cd (16.82 ± 4.90 and 0.006 ± 0.002 μg/g dry weight, respectively) in stellate sturgeon and lowest concentrations of Ni and V (0.08 ± 0.02 and 0.17 ± 0.03 μg/g dry weight) were observed in stellate sturgeon heart and beluga heart, respectively (P<0.05). Conclusion: The mean concentrations of Zn, Cd and V in caviar and muscle samples were lower than the permissible limits proposed by the United Kingdom's Ministry of Agriculture, Fisheries and Food (MAFF 2000) and World Health Organization (WHO). The guidelines for Cd, V and Zn are 0.2, 0.5 and 50 μg/g wet weight, respectively. The measured concentrations for these heavy metals are less than the published guidelines and do not constitute any threat to the human population that may consume these sturgeons obtained from the studied locations.


Tabarsa M.,Tarbiat Modares University | Rezaei M.,Tarbiat Modares University | Ramezanpour Z.,International Sturgeon Research Institute | Waaland J.R.,University of Washington
Journal of the Science of Food and Agriculture | Year: 2012

BACKGROUND: The nutritional compositions of two edible red (Gracilaria salicornia) and green (Ulva lactuca) seaweeds were determined to evaluate their possible uses as potential food ingredients. RESULTS: In general, these species contained limited amounts of lipids ranging between 0.99 and 2.00 g 100 g-1 dry weight) and considerably high amount of minerals, especially in G. salicornia (38.91 g 100 g-1 d.w.). The crude protein values varied between 9.58 and 10.69 g 100 g-1 d.w. Amounts for total amino acids were 889.78 ± 22.64 mg g-1 protein d.w. in G. salicornia and 543.3 ± 15.14 mg g-1 protein d.w. in U. lactuca. The most abundant fatty acids were C12:0, C16:0, C20:4 ω6 and C22:5 ω3, in addition to C18:1 in G. salicornia. Both seaweed species were balanced sources of ω3 and ω6 fatty acids with a ratio of ω6/ω3 that varied between 1.2 and 1.17. Between the seaweeds investigated, high levels of K (2414.02-11 380.06 mg 100 g-1 d.w.) were observed and the amounts of Ca, Na and Fe were higher than those reported for land plants. CONCLUSIONS: Thus, G. salicornia and U. lactuca may be utilised as value-added products for human nutrition purposes. © 2012 Society of Chemical Industry.


Mohseni M.,International Sturgeon Research Institute | Mohseni M.,University of Porto | Ozorio R.O.A.,University of Porto
Aquaculture Nutrition | Year: 2014

A 17-week feeding trial was carried out to evaluate the effects of dietary L-carnitine level in beluga, Huso huso. A total of fish averaging 1247 ± 15.6 g (mean ± SD) were randomly distributed into 18 fibreglass tanks, and each tank holding 10 fish was then randomly assigned to one of three replicates of six diets with 50, 150, 350, 650, 950 and 1250 mg L-carnitine kg-1 diet. At the end of 17 weeks of feeding trial, average weight gain (WG), feed efficiency (FE), protein efficiency ratio (PER) and condition factor (CF) of fish fed 350 mg kg-1 diet were significantly (P < 0.05) higher than those of fish fed 50, 150, 950 and 1250 mg kg-1 diets. WG, FE, PER and CF of beluga fed 650 mg kg-1 diet were also significantly higher than those of fish fed 50, 950 and 1250 mg kg-1 diets. Whole body and muscle protein were significantly improved by the elevation of dietary L-carnitine level up to 350 mg kg-1. Liver superoxide dismutase and glutathione peroxidase activities of fish fed 350 and 650 mg kg-1 diets were significantly higher than those of fish fed 50, 950 and 1250 mg kg-1 diets. The dietary L-carnitine level of 350-650 mg kg-1 diet could improve growth performance, feed utilization, protein-sparing effects of lipid, antioxidant defence system and reproductive success. Polynomial regression of WG suggested that the optimum dietary L-carnitine level was 480 mg kg-1 diet. Therefore, these results may indicate that the optimum dietary L-carnitine could be higher than 350 but <650 mg kg-1 diet in beluga reared in intensive culture conditions. © 2014 John Wiley & Sons Ltd.

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