Caspian Sea Ecology Research Center

Sari, Iran

Caspian Sea Ecology Research Center

Sari, Iran

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Adel M.,Iranian Fisheries Research Center | Saravi H.N.,Caspian Sea Ecology Research Center | Dadar M.,Shahid Chamran University | Niyazi L.,University of Mazandaran | Ley-Quinonez C.P.,Servicios de Salud de Sinaloa
Environmental Science and Pollution Research | Year: 2017

Concentrations of cadmium, lead, and mercury were measured in different tissues (liver, muscle, and shell) of 60 Caspian Pond Turtles collected from Tajan and Shiroud Rivers, southern basin of the Caspian Sea. Based on the results, different tissues showed different capacities for accumulating trace elements. The general trend of metals accumulation was: liver > shell > muscle. Results also showed that accumulation of these elements was not significantly different between sex and river in turtles (p > 0.05). Based on the results, Hg and Pb concentrations recorded in the present study were higher than some of the maximum concentration permissible. To our knowledge, this is the first report into heavy metal accumulation in tissues and organs of Caspian Pond Turtle from the southern basin of Caspian Sea. Further studies are needed to measure different heavy metals and trace metals in this valuable species. © 2015, Springer-Verlag Berlin Heidelberg.


Zare P.,Kaliningrad State Technical University | Kasatkina S.M.,Research Institute of Marine Fisheries and Oceanography AtlantNIRO | Shibaev S.V.,Kaliningrad State Technical University | Fazli H.,Caspian Sea Ecology Research Center
Fisheries Research | Year: 2017

Understanding the factors that influence the target strength (TS) of fish is important for calculating accurate estimates of fish biomass and abundance using acoustic-based stock assessment techniques. The purpose of this study was to derive a robust TS model for anchovy kilka (Clupeonella engrauliformis), an important commercial-targeted fish species, based on its biological and morphological characteristics (length, weight, female maturity status, condition factor, depth of fish occupancy), and season. In situ measurements of TS were collected in the southern Caspian Sea during winter (February-March) and spring (May) 1997 using a Simrad EK500 echosounder operating a 38-kHz split-beam transducer. The results showed high variability in the mean TS estimates of anchovy kilka, despite a relatively small range in the sizes of fish encountered across the study site (range in mean fish lengths = 3.2 cm). A multiple linear regression analysis showed that the mean TS of anchovy kilka was significantly (P < 0.05) correlated with indices of female maturity status and depth of fish occupancy, but not size (P > 0.05), suggesting that biological characteristics other than size were important drivers of this variation. Our estimated TS model for anchovy kilka conformed to the equation: TS=20logL−0.096(%MF)−6.04log(+1)−65.9 when the percentage of maturing females (MF, %) and the depth of fish occupancy (Z, m) were included in the analysis. These results help to improve the accuracy of acoustically-derived estimates of anchovy kilka abundance and biomass during routine stock assessments, which is important for robust resource management strategies in the Caspian Sea region. © 2016 Elsevier B.V.


Karimzadeh G.,Mazandaran Province Fisheries Administration | Gabrielyan B.,Armenian National Academy of Sciences | Fazli H.,Caspian Sea Ecology Research Center
Iranian Journal of Fisheries Sciences | Year: 2010

The aim of the present study was to investigate the age structure, length-weight relationship, sex ratio, sexual maturity stages, growth parameters, natural and fishing mortality coefficients of three species of kilka, including common, anchovy and bigeye kilka. The fork length-weight relationship of common, anchovy and bigeye kilka were calculated as W=0.000153 FL 2.37, W=0.000349 FL 2.18 and W=0.00160 FL 2.97, respectively. The parameters of the von Bertalanffy growth curve for length were L ∞ = 143.5 mm, K = 0.30 yr -1 and t 0 = -1.02 yr for common kilka; L ∞ = 151.9 mm, K = 0.28 yr -1 and t 0 = -1.12 yr for anchovy kilka and L ∞ = 148.6 mm, K = 0.46 yr -1 and t 0 = -0.18 yr for bigeye kilka. The instantaneous coefficient of natural mortality of common, anchovy and bigeye kilka were estimated as 0.671, 0.633 and 0.881 yr -1, respectively. The current exploitation rates of three species were estimated as 0.55, 0.41 and 0.26 for common, anchovy and bigeye kilka, respectively. The results suggest that common kilka stock is under over-fishing now.


Nasrollahzadeh Saravi H.,Caspian Sea Ecology Research Center | Pourgholam R.,Caspian Sea Ecology Research Center | Pourang N.,Institute of Fisheries Research Organization | Rezaei M.,Caspian Sea Ecology Research Center | And 2 more authors.
Journal of Mazandaran University of Medical Sciences | Year: 2013

Background and purpose: Heavy metals are non-degradable pollutants that could accumulate in marine animals including fish. The aim of this study was to determine the levels of six heavy metals (Zn, Cu, Ni, Pb, Cd and Hg) in edible tissue of Caspian carp (Cyprinus Carpio). We also studied the bioaccumulation factor (BFA) and target hazard quotients (THQ) of this fish in the southern Iranian Caspian Sea coast. Materials and methods: Twenty eight samples of fish were collected from seine and trawl during winter and spring 2010. Heavy metals were prepared (using Freeze dryer) by digestion and extraction process and then analyzed using atomic absorption equipped with flame, graphite and cold vapor system. Results: Results showed that Zinc (185±57) and Cu (3.68±0.30) μg/g.dw were seen more amongst the contaminants in the edible tissue of the Caspian carp. Concentration of Hg was 0.50±0.17 μg/g.dw and levels of Cd and Pb were below the limit of detection. BAF of metals were Zn> Cu> Hg. Conclusion: Ni, Cd and Pb in the Caspian carp muscle were lower that standard levels, but concentration of Hg was higher than the standard levels recommended by WHO, and ERL and ERM limits. Also, THQ revealed low levels of all metals and hazard index (HI) was found lower than critical level. It is believed that consumption of 142 gram of Caspian carp muscle per week does not have any prohibition for adults.


Safari R.,Caspian Sea Ecology Research Center | Yaghoubzadeh Z.,Caspian Sea Ecology Research Center
Journal of Mazandaran University of Medical Sciences | Year: 2013

Background and purpose: Bioindicators are microorganisms directly associated with environmental changes which their numbers are affected by chemical pollutants. Materials and methods: Sampling was done from four stations in Shirood River in depth of 20 cm of water surface and transferred to laboratory in less than 24 hr. KF medium, SPS, ECC Chrome agar, Plate count agar were used for isolation of fecal streptococci, sulfate-reducing bacteria, E. coli, coliform and heterotrophic bacteria, respectively. Results: The mean count of TVC, fecal streptococci, coliform, E. coli, sulfate-reducing bacteria, in four stations in shirood river were 6.78×105, 9.7×104, 1.07×106, 1.27×106 (cfu/1ml); 6×101, 3.65×102, 5.83×102, 1.6×102 (fecal streptococci); 3.58×103, 3.54×103, 2.11×103, 4.42×103 (coliform); 2.51×102, 6.81×102, 1.95×102, 3.62×102 (E. coli); 3.21×102, 2.62×102, 2.25×102, 2.04×101 (sulfate-reducing bacteria). Conclusion: The results of this study showed that the rate of pollution in the studied stations was higher than the standard limits. Other studies also indicate that distribution of some bacterial bioindicators such as coliform and fecal coli forms is very high in site of effluent of domestic and urban sewage.


Binaii M.,Caspian Sea Ecology Research Center | Ghiasi M.,Caspian Sea Ecology Research Center | Farabi S.M.V.,Caspian Sea Ecology Research Center | Pourgholam R.,Caspian Sea Ecology Research Center | And 5 more authors.
Fish and Shellfish Immunology | Year: 2014

The present study investigated the effects of different dietary nettle (Urtica dioica) levels on biochemical, hematological and immunological parameters in beluga (Huso huso). Fish were divided into 4 groups before being fed for 8 weeks with 0%, 3%, 6% and 12% of nettle. The blood samples were collected on week 4 and 8. The use of nettle did not significantly changethe mean cell volume, mean cell haemoglobin, lymphocytes, eosinophils, albumin, glucose, alanine aminotransferase, aspartate aminotransferase, alkaline phosphatase and lysozyme activity on week 4 and 8. After 4 weeks, the total red blood cell (RBC) and hematocrit (Ht) showed a significant increase in 12% nettle group compared to the 3% nettle and control groups but haemoglobin (Hb) had a significant change in 12% nettle compared to the control. At the same time was not found a significant change in the mean cell haemoglobin concentration (MCHC), total white blood cell (WBC), neutrophils, respiratory burst activity (RB), total immunoglobulin (Ig) and total protein (TP), triglyceride (Tri) and cholesterol (Chol). After 8 weeks, the fish treated with nettle exhibited significantly increase in neutrophil and Hb levels compared to the control and between treatment groups, 12% nettle group shown the highest Hb while RBC and Hct values significantly rose in fish fed by 12% compared to the control. Supplementing 6% and 12% nettle increased the WBC and MCHC compared to the other groups. The group fed 12% showed a highly significant difference in RB, TP and Ig after 8 weeks. However, Tri and Chol were significantly decreased in the juvenile beluga fed by the 6% and 12% nettle diet compared to the other groups. The results suggest that by using this herb there will be an improvement in hemato-biochemical parameters and immune function of juvenile beluga. © 2013 Elsevier Ltd.


Adel M.,Iranian Fisheries Research Organization | Pourgholam R.,Caspian Sea Ecology Research Center | Zorriehzahra J.,Iranian Fisheries Research Organization | Ghiasi M.,Caspian Sea Ecology Research Center
Fish and Shellfish Immunology | Year: 2016

This study was aimed to assess the potential effects of Mentha piperita on the hemato – immunological and biochemical parameters, skin antibacterial activity and protection against Yersinia ruckeri infection in rainbow trout Oncorhynchus mykiss. Fish were divided into 4 groups before being fed diets supplemented with 0, 1, 2 and 3% of Mentha piperita (MP) plant extract for 8 weeks. Dose-dependent increases immune (both in skin mucus and blood serum) and hematological parameters (number of red and white cells, hematocrit and hemoglobin contents), as well as in respiratory burst activity, total protein, albumin, and neutrophil levels in fish fed supplemented diets compared to the control fish. Furthermore, dietary MP plant extract supplements have no significant effect on blood biochemical parameters and enzymatic activities of liver determined in serum of rainbow trout. After 8 weeks the cessation of feeding with MP plant extract, survival rates of 54.4%, 63.6% and 75.2% were recorded in groups which received 1, 2 and 3% of MP plant extract of feed, respectively, compared to 34.6% survivals in the control. This study underlying several positive effects of dietary administration of MP plant extract to farmed fish. © 2016 Elsevier Ltd


PubMed | Shahrekord University and Caspian Sea Ecology Research Center
Type: Journal Article | Journal: Veterinary research forum : an international quarterly journal | Year: 2015

Parasitic diseases are harmful and limiting factors in breeding and rearing ornamental fish industry. In this study, 400 apparently healthy ornamental fishes from five species (each species 80 specimens) including: Goldfish (Carassius auratus), guppy (Poecilia reticulate), angelfish (Pterophyllum scalare), discus (Symphsodon discus) and sailfin mollies (Poecilia latipinna) was obtained from a local ornamental fish farm in the north of Iran during 2011 to 2012. The primary purpose of this study was to determine the parasitic infections of aquarium fish in Iran. For this purpose, fish were first examined for ectoparasites using wet mount under a light microscope. Then, the alimentary ducts of fish were observed under light and stereo microscope. In survey of different infection rates for different parasitic infections in examining fish: Dactylogyrus sp., Gyrodactylus sp., Ichthyophthirius multifiliis Trichodina reticulata, Capillaria sp. and Lernaea cyprinacea were collected from five species. All five fish species had Monogenea (Gyrodactylidae and Dactylogyridae) in their skins and gills, the highest prevalence was observed in C. auratus and the lowest was in P. scalare and S. discus. Also, Capillaria sp. was reported as a first record from the abdominal cavity of P. scalare in Iran. Our findings revealed that the protozoal infections are very common among aquarium fishes. Although, no gross pathology was observed among infected fishes, but it is likely that in case of any changes in the environment, then parasitic infections could be harmful.


PubMed | Universiti Sains Malaysia and Caspian Sea Ecology Research Center
Type: Journal Article | Journal: Marine pollution bulletin | Year: 2016

This study aimed to evaluate the spatial and temporal distribution of heavy metals (Cd, Cr, Cu, Co, Fe, Pb, Ni, V, and Zn) in the sediments of Bayan Lepas Free Industrial Zone of Penang, Malaysia. Ten sampling stations were selected and sediment samples were collected during low tide (2012-2013). Metals were analyzed and the spatial distribution of metals were evaluated based on GIS mapping. According to interim sediment quality guidelines (ISQG), metal contents ranged from below low level to above high level at different stations. Based on the geoaccumulation index (I


PubMed | Caspian Sea Ecology Research Center and Iranian Fisheries Research Organization
Type: | Journal: Fish & shellfish immunology | Year: 2016

This study was aimed to assess the potential effects of Mentha piperita on the hemato - immunological and biochemical parameters, skin antibacterial activity and protection against Yersinia ruckeri infection in rainbow trout Oncorhynchus mykiss. Fish were divided into 4 groups before being fed diets supplemented with 0, 1, 2 and 3% of Mentha piperita (MP) plant extract for 8 weeks. Dose-dependent increases immune (both in skin mucus and blood serum) and hematological parameters (number of red and white cells, hematocrit and hemoglobin contents), as well as in respiratory burst activity, total protein, albumin, and neutrophil levels in fish fed supplemented diets compared to the control fish. Furthermore, dietary MP plant extract supplements have no significant effect on blood biochemical parameters and enzymatic activities of liver determined in serum of rainbow trout. After 8 weeks the cessation of feeding with MP plant extract, survival rates of 54.4%, 63.6% and 75.2% were recorded in groups which received 1, 2 and 3% of MP plant extract of feed, respectively, compared to 34.6% survivals in the control. This study underlying several positive effects of dietary administration of MP plant extract to farmed fish.

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