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List of Articles
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Open Access Article
1 - Cadmium, copper and iron accumulation in tissues of belanger's croaker, Johnius belangerii (C.) from northern coasts of Persian Gulf (Case study: Deylam port)
Abstract This study was carried out from September 2006 to August 2007 in order to estimate heavy metals accumulation Cadmium, Copper and Iron in the muscle, gills and liver tissues of Johnius belangerii collected from Deylam in Bushehr Province. Sampli More Abstract This study was carried out from September 2006 to August 2007 in order to estimate heavy metals accumulation Cadmium, Copper and Iron in the muscle, gills and liver tissues of Johnius belangerii collected from Deylam in Bushehr Province. Sampling was performed seasonally and the study aimed to compare heavy metal concentrations in the fish with the safe limit standards. Fish samples were collected randomly from the catch of trawl fishing. After biometry of fish, they were divided into three length groups A, B and C; and tissue samples were taken form each length group and analyzed for heavy metals content using atomic absorption spectrophotometer. Heavy metal concentrations were significantly different in fish tissues, stations, and seasons. The highest concentration of cadmium, copper, and iron were recorded in the liver tissue and the lowest concentration was observed in the muscle tissue. The concentration of heavy metals showed a marked decrease from autumn to winter, and then increased from winter to summer. This trend was observed for all of the metals and could be related to the seasonal variations such as temperature and salinity changes. Cadmium concentration measured in fish samples was found to be above the safe limit proposed by MAFF, NHMRC, and WHO while the concentrations of copper and iron were below the standard safe limits. Manuscript profile -
Open Access Article
2 - Effect of different concentrations of waterborne sodium on excretion of ammonia in embryonic rainbow trout (oncorhynchus mykiss) in a water recirculating system
Abstract A completely randomized design was conducted to determine the effect of four concentrations of waterborne sodium (2, 14, 50, 100 mg L-1) on excretion of ammonia in embryonic rainbow trout in a water recirculating system. Twelve experimental units, with the cap MoreAbstract A completely randomized design was conducted to determine the effect of four concentrations of waterborne sodium (2, 14, 50, 100 mg L-1) on excretion of ammonia in embryonic rainbow trout in a water recirculating system. Twelve experimental units, with the capacity of holding 45 liter of water were used and 22.5 g egg introduced in each one. Different water media (treatments) was made using analytical salts (Merck) added into double-de-ionized distilled water. Water temperature variations during incubation period were 7.5-9 ºC. Ammonia in external water measured during the incubation period every week. Prior to allocating the newly fertilized eggs to trays as well as at the time of hatching, sodium ion and total nitrogen measured in the whole egg. Ammonia level was significantly (P<0.05) different in treatments, so that the highest ammonia level was observed in the [Na+] 2 mg L-1. In all treatments, total nitrogen of the whole egg did not significantly (P>0.05) change compared to newly fertilized one. In the variation of the whole egg Na+ was significant (P<0.05) among treatments and the newly fertilized egg. The whole egg sodium content in [Na+] 100 mg L-1 was higher than the other treatments. The results of this study indicated that excretion of ammonia by embryos of rainbow trout to external water does not increase along with increasing waterborne sodium concentration and higher sodium uptake by egg. Manuscript profile -
Open Access Article
3 - The comparative study of muscle chemical composition of Schizothorax zarudnyi and Schizocypris altidorsalis in different seasons and sex
Abstract[1] This study was conducted to determine the muscle chemical composition (protein, lipid, ash and moisture) of Schizothorax zarudnyi and Schizocypris altidorsalis and their changes related to sex and season during the year (autumn 2007- summer 2008) in Univers MoreAbstract[1] This study was conducted to determine the muscle chemical composition (protein, lipid, ash and moisture) of Schizothorax zarudnyi and Schizocypris altidorsalis and their changes related to sex and season during the year (autumn 2007- summer 2008) in University of Zabol. The results indicated that the chemical composition of both fish depends on season and sex. There were differences in annual changes between S. zarudnyi and S. altidorsalis, as the highest moisture content and lowest protein and lipid content was observed in autumn for S. zarudnyi, while it happened for S. altidorsalis in spring. The lipid content was more in S. zarudnyi muscle than S. altidorsalis muscle. The mean, minimum and maximum protein content of S. zarudnyi muscle were 14.47 ± 0.61, 12.77 and 16.50 percent in male and 14.18 ± 0.95, 13.22 and 15.32 percent in female, respectively. The mean, minimum and maximum protein content of S. altidorsalis muscle were 14.45 ± 0.87, 13.03 and 16.27 percent in male and 14.25 ± 1.00, 13.05 and 16.04 percent in female, respectively. The effects of sex and season on muscle moisture content in both fish were significant (P<0.05). *- Corresponding Author; E-mail: e_zakipour@yahoo.com Manuscript profile -
Open Access Article
4 - Determination the effects of replacing canola meal with soybeen meal on the growth of rainbow trout (oncorhynchus mykiss).
Abstract[1] In this study, 5 diets were formulated to examine the effect of replacing 0, 25, 50, 75, and 100 % of canola meal to soybean meal on the growth performance of rainbow trout (Onchorhynchus mykiss). All of the experimental diets were iso-caloric and iso-nitro MoreAbstract[1] In this study, 5 diets were formulated to examine the effect of replacing 0, 25, 50, 75, and 100 % of canola meal to soybean meal on the growth performance of rainbow trout (Onchorhynchus mykiss). All of the experimental diets were iso-caloric and iso-nitrogenous. The experimental period was 63 days and used a total of 450 rainbow trout weighting 10gr randomly assigned to 15 tanks (30 fish per tank). Three tanks used in each diet. At the end of the trial, the performance was determined by weight gain, total feed intake, feed conversion ratio, protein efficiency ratio, specific growth rate, and survival. There was no significant difference in any of the performance growth and feeding parameters. These studies show that canola meal has potential to replace substantial level of soybean meal in diets for rainbow trout with no significant decrease in growth or feed efficiency. *- Corresponding Author; Email: mahmodi.roghaye@yahoo.com Manuscript profile -
Open Access Article
5 - Identification and Abundance of fish fauna in Qezel owzan River (Zanjan Province)
Abstract The Qezel Owzan River is one of the most important rivers in Zanjan province. The main purpose of the study was determination of fish diversity and abundance. The samples were taken from 5 stations. The study started in 2008 and lasted in 2009. The instruments MoreAbstract The Qezel Owzan River is one of the most important rivers in Zanjan province. The main purpose of the study was determination of fish diversity and abundance. The samples were taken from 5 stations. The study started in 2008 and lasted in 2009. The instruments used for catching the samples were electroshock, cast net, and dip net. Results showed that 10 fish species belong to 2 families: minnows (Cyprinidae) and hillstream loaches (Balitoridae) which exist in the river, so Cyprinidae with 7 genus and 9 species and maximum abundance of (98.2%) is prevalent, while Balitoridae had only one species. Capoeta capoeta gracilis was prevalent in 3 seasons and in three stations namely satations 3, 4, and 5. On the other hand, Alburnoides bipunctatus were seen just in 1 season and in the 1st and 2nd stations. In addition, C. capoeta gracilis, A.bipunctatus, B.capito with the abundance of 33.6, 22.1 and 13.1 % of total number of caught fishes in the study were respectively abundant. In this study the least diversity (4 species) was observed in 3 stations and the most diversity (10 species) in downstream station(S 1). Manuscript profile -
Open Access Article
6 - Study of usage possibility of underground brackish water for broodfish rearing of Rainbow trout (Oncorhynchus mykiss) and evaluation of gametes quality
Abstract There is a high potential of aquaculture with the use of underground brackish water especially in central areas of Iran. On the other hand, environmental factors have so important effects on gonad quality of rainbow trout. According to these factors and the ea MoreAbstract There is a high potential of aquaculture with the use of underground brackish water especially in central areas of Iran. On the other hand, environmental factors have so important effects on gonad quality of rainbow trout. According to these factors and the earlier gonad maturation of rainbow trout in brackish water, usage possibility of underground brackish water for broodfish rearing of Rainbow trout (Oncorhynchus mykiss) and evaluation of their gametes quality have was studied. Broodfish have reared for 6 months in both underground brackish water (11.5 ppt) in Bafgh area and in fresh water in Yasouj region. Results showed that there was no significant difference in growth indexes of broodfish (weight, length and condition factors). They were also matured and spawned successfully in Bafgh area. Moreover gonad quality in brackish water was better than fresh water significantly. In result, broodfish rearing will be useful in underground brackish water, if suitable thermal condition is prepared. [1] * - Corresponding Author; Email: mohammaditabasy@gmail.com Manuscript profile -
Open Access Article
7 - Comparison of effects on hypophysis treatment with HCG and Metoclopramide in the efficiency of artificial propagation on bream reproduction fishes ( Abramis brama orientails Berg 1905)
Bream fishes (Abramis brama orientalis) are the valuable bony fishes of Caspian Sea. With respect to this point that there is not any report in application of HCG hormone in composition with Metocloparmide on bream fishes, the executive operation of this research More Bream fishes (Abramis brama orientalis) are the valuable bony fishes of Caspian Sea. With respect to this point that there is not any report in application of HCG hormone in composition with Metocloparmide on bream fishes, the executive operation of this research has been assessed on May 09, 2008 and it was coincident with the commencement of reproduction season. To execute this research, 7 groups of treatment have been considered which are included: hypophysis (4 mg/kg B.W.) as control group, treatment group of HCG with three injection doses (1000, 2000 and 3000 IU/kg B.W.) lonely, and in compound with Metocloparmide with the dose of (5 mg/kg B.W.).With calculating of 5 females as the repetition for every treatment, totally 35 pairs of male and female breams were considered for this research. The results of this research showed that to the operations of hormone trophy with the only usage of HCG were not successful in any of the bream female reproduction fish but a compound of HCG hormone with Metoclopramide had a favorite result, so that the highest percent of response with the amount of 80% is belonged to treatment fishes of HCG with the dose of 2000 IU/kg in compound with MET with the dose of 5 mg/kg and control group. Also, the most percentage of egg fecundation was related to the above-mentioned treatment group with 61% and control group with 69%. In the viewpoint of the percentage of hatching, the most amount was related to treatments of HCG in two doses of 3000 IU/kg and 2000 IU/kg in compound with MET with dose of 5 mg/kg for 70 and 75 percent respectively and the control group with 78 percent. Therefore, with respect to the acquired results, treatment group of HCG with the dose of 2000 IU/kg in compound with MET at dose of 5 mg/kg and the control group have the most suitable particulars as the fecundation in artificial propagation of bream reproductions. Also, on the basis of the performed analysis on 35 bream reproduction fish, these averages are obtained: Average of weight: 792.43± 59.38 g, average of the total length: 34.19±1.06 cm, average of the round of stomach: 26.31± 0.98 cm, average of age: 4.00± 0.14 year. In the statistical analysis on reproduction treatment groups of HCG in compound with MET and the control group which have given positive respond to the hormone injection operation, these measurements are determined: the degree- hour maturation of bream fishes: 308.92 ± 14.97 degree-hours, the average of the extracted ovum weight: 87.09 ±8.44 g, the percent of the ovum weight to the body weight: 8.78 ±0.30 percent. Manuscript profile -
Open Access Article
8 - The effects of different drying methods on quality and food factor of Gammarus (Pontogammarus maeoticus)
In this experiment, Gammaruses (Pontogammarus maeoticus) which were collected from southern coast of the Caspian Sea in Anzali area firstly, were dried through 4 different drying methods in 4 isolated groups which were consisted of: hot air current, indirect sun More In this experiment, Gammaruses (Pontogammarus maeoticus) which were collected from southern coast of the Caspian Sea in Anzali area firstly, were dried through 4 different drying methods in 4 isolated groups which were consisted of: hot air current, indirect sunshine, direct sunshine, and hot surface. Then, the average amount of total protein and lipid in dried Gammarus was measured in the laboratory. The results of the Analayz-Varians among the groups showed significant differences in the average amount of lipid (P<0.01) and protein (P<0.05). In addition, by comparing these factors by the Duncan test, the greatest amount of protein in hot surface method (47.57%) and the lowest amount of protein in hot current method (45.98%) were absorved. Also, the highest amount of lipid was observed in hot surface method (6.06%) and the lowest amount (3.39%) was found in sunshine indirect method. Manuscript profile -
Open Access Article
9 - Evaluation of hydrocare efficacy to reduce the skin bacterial load of beluga (Huso huso) fingerlings and rearing water
Abstract[1] Hydrocare is a compound of Hydrogen peroxide and sodium percarbonate which applied as a disinfectant. In this research 450 Beluga (Huso huso) fingerlings were kept in 9 veniros, in three replications of control group and treatments.   MoreAbstract[1] Hydrocare is a compound of Hydrogen peroxide and sodium percarbonate which applied as a disinfectant. In this research 450 Beluga (Huso huso) fingerlings were kept in 9 veniros, in three replications of control group and treatments. First treatment was disinfected with 30 g/m3 dosage, second treatment was disinfected with 40 g/m3 dosage for 6 days (30 min) with Hydrocare. Alive samples in rearing water were moved to laboratory .Samples were washed with sterile neutral salt solution to remove adherent bacteria. Skin was removed in sterile condition, and then was homogenized and appropriate dilutions were spread on the surface of TSA (tryptic soy agar) and finally the plates were incubated. For bacterial loading in rearing water, above process was done by the same method .After bacterial growth, CFU (Colony Forming Unit) by means of counting colonies was measured. The mean of skin bacterial flora in the first treatment was 5.08 ±0.39 log CFU/gr and in the second treatment was 4.35±0.35 log CFU/gr and they had a lower amount in comparing with control group with the mean of5.81±0.38 log CFU/gr. In order to One way ANOVA and Tukey HSD tests there is a significant statistical difference. In the study rearing water ,the mean of bacterial flora of rearing water in the first treatment was4.38± 1.47 log CFU/ml and in the second treatment was3.97±0.45 log CFU/ml and they had a lower amount in comparing with control group with the mean of4.87±1.54 log CFU/ml. In order to One way ANOVA and Tukey HSD tests there is a significant statistical difference. * Corresponding Author; Email: kadusa_moazzenzadeh@yahoo.com Manuscript profile
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