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  • 1
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    Annual cycle of ovarian development and sex hormones of grey mullet (Mugil cephalus) in captivity (2018)
    Details
    Publication Date: 2021-05-19
    Description: The grey mullet fingerling were imported to Iran in 1997 from Hong Kong and in coastal fish pond of north part of Iran were successfully cultured in order to obtain broodstocks and induce artificial reproduction. Seasonal changes in serum concentrations of Testosterone, 17-β Estradiole (E2), 17-α Hydroxy Progesterone and also the level of calcium, Triglyceride and cholesterol in females grey mullet in captivity were measured by Radioimmunoassay or colorimetry, respectively. Investigating of sex steroids in different sexual maturity indicated that increasing of oocyte diameter and sexual maturity development serum testosterone was increased significantly (P〈0.05). Although Biochemical parameters concentrations in blood serum of grey mullet diminished significantly until third stage of sexual maturity (P〈 0.05), their level showed a rising trend at the fourth stage. A significant increase was observed in the serum protein and cholesterol concentrations (P〈0.05), while, in contrast, serum Calcium ion and triglyceride levels didn’t have significant differences in third and fourth stages of sexual development (P〉 0.05). These results suggest that the seasonal changes in serum lipids and gonadal steroids were associated with reproductive development. The data also support the hypothesis that the shortening photoperiod is a major factor in stimulating reproductive activity in striped mullet.
    Description: Published
    Keywords: Mugil cephalus ; Ovarian development ; Sexual steroid hormones ; Captivity ; Biology ; Physiology
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.693-703
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  • 2
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    Reproductive biology of Cobitis keyvani (Cobitidae) from the Talar River in the southern Caspian Sea basin (2018)
    Details
    Publication Date: 2021-05-19
    Description: Some aspects of the reproductive biology of Cobitis keyvani (Mousavi-Sabet, Yerli, Vatandoust, Ozeren and Moradkhani, 2012), an endemic Loach fish species from the Talar River in the southern Caspian Sea basin, in north of Iran was studied by regular monthly collections throughout a year. Fecundity, condition factor, gonado-somatic, modified gonado-somatic and Dobriyal indices were estimated. Regression analyses tested the dependence of fecundity on fish length, weight, gonad weight and age. Significant differences were observed between the total number of females and males, females being more abundant. The mature females and males were longer than 49 and 45 mm in total length, and +2 and +1 in age, respectively. The average egg’s diameter was 0.56 mm. The spawning of Cobitis keyvani from Talar River took place from May to late July, when the water temperature is between 18.7 to 24.0°C. At the beginning of the reproduction period, the average GSI values were 10.09%, ranging from 6 to 25% in ripe mature females. The absolute and relative fecundity were 2211 and 586 respectively. The absolute fecundity was significantly related to body weight and gonads weight. Based on the gonado-somatic and Dobriyal indices, it was concluded that the fish has a prolonged active reproductive period. Their long reproductive activity and high range of fecundity are types of adaptation by short-lived small fishes to environmental conditions.
    Description: Published
    Keywords: Cobitis keyvani ; Cobitidae ; Gonado-somatic index ; Dobriyal index ; Spawning ; Condition factor ; Fecundity ; Biology ; Fecundity
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.383-393
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  • 3
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    The study of pollution in the Gorgan bay (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: From an environmental standpoint bays around the world are very important ecosystems Including the Gulf of Gorgan Bay and thus are important. Which has a relatively low depth, a little flow, temperature appropriate, biogenic materials and abundant food in the sea suitable for children sometimes place (Nursery ground) and also the perfect place for power (Fattening ground) is an early sea fish. In this research effort will be the initial studies on the impact of environmental pollutants on the ecosystem of the Gulf of Gorgan and the quality and quantity of pollution, especially pollution, agricultural pesticides and entering the Gulf of Gorgan and the impact on the ecosystem's the initial assessment and the monitoring of changes in them over the years. The user in the Gulf of Gorgan, agriculture. Pollution from agricultural fields related to pesticides and fertilizers are used in the fields. According to consumer research, and the remaining amount of pesticides in water and sediments of the Gulf of measured, indicated that most of the remains of chlorinated pesticides in sediments of the pesticides used in the agricultural sector In addition, all the toxins in the summer and spring peak. In addition, the DDE concentration compared to other poisons. In the case of other contaminants in the area is now threatened by the Gulf of Gorgan, although not serious, but it seems that the increase in organic matter and reduce the amount of oxygenof the water . the near future to Eutrofication risks in the ecosystem.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Pollution ; Ecosystem ; Temperature
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 50pp.
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  • 4
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    Study of penculture of the common carp ( Cyprinus carpio L.) fingerlings at the Gorgan Bay to the maturity stage (broodstock management) (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: The aim of present project is study on the possibilities of brood stock production from fingerlings in the penculture condition and the effect of density on it .this project was done during three years with two different treatment and three repetitions in the Gorgan Bay. First treatment with two fingerlings per square meter and the 2nd with four fingerlings per square meter in each pen.To carry out the project at first fingerlings were brought from breeding and recruitment centre –Sijeval ( Kolmeh) and the stocked at the earthen pound with concentrated food .After that they were adaptated with brakish water between 7-10 days and transferred to Gorgan Bay for cultivation with average weight of 93.78±32.66 grams and 20.53±2.37 cm in length. It should be noted that 6 pens ( which surrounded by nets in the water ) were fixed using mast with 15-20 cm in diameter and 5.5 meter in length , Net mesh size was 16 mm with string number 33 of kapron.Feeding was done according to the program two times by giving concentrated food at the period of cultivation Physic -o -chemical factors were measured. biometery was done monthly at each pen and other fishes (unwanted) were observed at the same time. results indicate that in the 1st and 2nd treatments average survival rate was 52.3 and 41 percent respectively with average weight of 410±64.98 grams and 390±52.8 and 28.3±1.79 cm and 27.66±1.57in length.SPSS used to analysethe data such as average length and weight of fish in the treatments and in different months with ANOVA method (p≤ 0.05) . results show that there is no significant difference between treatments.Autopsy observation also showed that fishes ( female and male ) are mature and histological studies showed that most of observed eggs are entirely mature with 800-1200 micron diameter gonad ( male) were mature at the pen in the Gorgan Bay condition .The male and female hormones were evaluated. 17-B- Estradiol and 11-keto testosterone hormones for adult fish (female and male) parents respectively are similar in dense with those adult fish before injection to use at the artificial breeding. Maturation were verified by autopsy, histology and hormone studies.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Penculture ; Carp brood stock ; Common carp ; Cyprinus carpio ; Fingerlings ; Maturity ; Broodstock ; Breeding ; Earthen ponds ; Brakish water ; Survival rate ; Maturation
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 121pp.
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  • 5
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    Reproductive biology of Cobitis keyvani (Cobitidae) from the Talar River in the southern Caspian Sea basin (2021)
    In:  http://aquaticcommons.org/id/eprint/22521 | 18721 | 2018-04-17 20:02:21 | 22521 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-06
    Description: Some aspects of the reproductive biology of Cobitis keyvani (Mousavi-Sabet, Yerli, Vatandoust, Ozeren and Moradkhani, 2012), an endemic Loach fish species from the Talar River in the southern Caspian Sea basin, in north of Iran was studied by regular monthly collections throughout a year. Fecundity, condition factor, gonado-somatic, modified gonado-somatic and Dobriyal indices were estimated. Regression analyses tested the dependence of fecundity on fish length, weight, gonad weight and age. Significant differences were observed between the total number of females and males, females being more abundant. The mature females and males were longer than 49 and 45 mm in total length, and +2 and +1 in age, respectively. The average egg’s diameter was 0.56 mm. The spawning of Cobitis keyvani from Talar River took place from May to late July, when the water temperature is between 18.7 to 24.0°C. At the beginning of the reproduction period, the average GSI values were 10.09%, ranging from 6 to 25% in ripe mature females. The absolute and relative fecundity were 2211 and 586 respectively. The absolute fecundity was significantly related to body weight and gonads weight. Based on the gonado-somatic and Dobriyal indices, it was concluded that the fish has a prolonged active reproductive period. Their long reproductive activity and high range of fecundity are types of adaptation by short-lived small fishes to environmental conditions.
    Keywords: Biology ; Fisheries ; Gonado-somatic index ; Dobriyal index ; Spawning ; Condition factor ; Fecundity ; Caspian Sea ; Iran
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 383-393
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  • 6
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    Study of possibilities of aquaculture activities in the Gorgan Bay (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25660 | 18721 | 2018-10-08 08:56:34 | 25660 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: The Gorgan golf is one of unique ecosystem in Iran which has plenty of known and unknown ecological values. Different agents threaten this ecosystem such as severe exploitation of natural resource on human behalf. This must be restricted using an accepted programs otherwise the ecological situation of the Gorgan golf will be worsen and finally to be died. In these study biological circumstances of the golf has been investigated in order to evaluate its ecological capacity to develop a sustainable aquaculture activities. This study started from Sep, 2010 and lasted to Oct, 2011. On the basis of the results from this study, and with considerations of all environmental conditions some aquatic organisms recommended for aquaculture purposes such as common carp (Cyprinus carpio), Caspian sea salmon (Salmo truta caspius), sturgeons stellate (Acipenser stellatus), Persian sturgeon (Acipenser persicus) and the great sturgeon (Huso huso). The farming procedure recommended as pen culture. In this study, the suitable surface of each pen, required information over each cultured species, suitable density and the amount of catch for each species have been determined. The amount of Nitrogen and Phosphorous originated from feeding and also secreted from fish species as the pollution index entered into the farming sites. The authorized amount of pollution factors for production and aquaculture in the Gorgan golf has been determined. In addition the study over the structure type for farming and also the suitable site for pen culture with consider to the facilities and conditions have been done. With notice to the above, with developing the aquaculture in this ecosystem, local workers will be run and plenty of capital will be invested and finally this will tend to the great revenues by producing of favor protein. This industry is able to change the region to a most important sites to produce aquatic organisms.
    Keywords: Aquaculture ; Iran ; Gorgan Bay ; Cyprinus carpio ; Salmo truta caspius ; Acipenser stellatus ; Acipenser persicus ; Huso huso ; Ecosystem ; Aquaculture ; Possibilities
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 84
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  • 7
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    The study of pollution in the Gorgan bay (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25679 | 18721 | 2018-10-08 09:40:22 | 25679 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: From an environmental standpoint bays around the world are very important ecosystems including the Gulf of Gorgan Bay and thus are important. Which has a relatively low depth, a little flow, temperature appropriate, biogenic materials and abundant food in the sea suitable for children sometimes place (Nursery ground) and also the perfect place for power (Fattening ground) is an early sea fish. In this research effort will be the initial studies on the impact of environmental pollutants on the ecosystem of the Gulf of Gorgan and the quality and quantity of pollution, especially pollution, agricultural pesticides and entering the Gulf of Gorgan and the impact on the ecosystem's the initial assessment and the monitoring of changes in them over the years. The user in the Gulf of Gorgan, agriculture. Pollution from agricultural fields related to pesticides and fertilizers are used in the fields. According to consumer research, and the remaining amount of pesticides in water and sediments of the Gulf of measured, indicated that most of the remains of chlorinated pesticides in sediments of the pesticides used in the agricultural sector In addition, all the toxins in the summer and spring peak. In addition, the DDE concentration compared to other poisons. In the case of other contaminants in the area is now threatened by the Gulf of Gorgan, although not serious, but it seems that the increase in organic matter and reduce the amount of oxygen of the water. The near future to Eutrofication risks in the ecosystem.
    Keywords: Pollution ; Iran ; Gorgan Bay ; Pollution ; Ecosystem ; Temperature
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 50
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  • 8
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    Study of penculture of the common carp (Cyprinus carpio L.) fingerlings at the Gorgan Bay to the maturity stage (broodstock management) (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25548 | 18721 | 2018-10-05 16:03:37 | 25548 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: The aim of present project is study on the possibilities of brood stock production from fingerlings in the penculture condition and the effect of density on it .this project was done during three years with two different treatment and three repetitions in the Gorgan Bay. First treatment with two fingerlings per square meter and the 2nd with four fingerlings per square meter in each pen.To carry out the project at first fingerlings were brought from breeding and recruitment centre –Sijeval (Kolmeh) and the stocked at the earthen pound with concentrated food .After that they were adaptated with brakish water between 7-10 days and transferred to Gorgan Bay for cultivation with average weight of 93.78±32.66 grams and 20.53±2.37 cm in length. It should be noted that 6 pens (which surrounded by nets in the water) were fixed using mast with 15-20 cm in diameter and 5.5 meter in length , Net mesh size was 16 mm with string number 33 of kapron.Feeding was done according to the program two times by giving concentrated food at the period of cultivation Physic -o -chemical factors were measured. biometery was done monthly at each pen and other fishes (unwanted) were observed at the same time. results indicate that in the 1st and 2nd treatments average survival rate was 52.3 and 41 percent respectively with average weight of 410±64.98 grams and 390±52.8 and 28.3±1.79 cm and 27.66±1.57in length. SPSS used to analysethe data such as average length and weight of fish in the treatments and in different months with ANOVA method (p≤ 0.05) . results show that there is no significant difference between treatments. Autopsy observation also showed that fishes (female and male) are mature and histological studies showed that most of observed eggs are entirely mature with 800-1200 micron diameter gonad ( male) were mature at the pen in the Gorgan Bay condition .The male and female hormones were evaluated. 17-B- Estradiol and 11-keto testosterone hormones for adult fish (female and male) parents respectively are similar in dense with those adult fish before injection to use at the artificial breeding. Maturation were verified by autopsy, histology and hormone studies.
    Keywords: Aquaculture ; Iran ; Gorgan Bay ; Penculture ; Carp brood stock ; Common carp ; Cyprinus carpio ; Fingerlings ; Maturity ; Broodstock ; Breeding ; Earthen ponds ; Brakish water ; Survival rate ; Maturation
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 121
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  • 9
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    Effects of acute crude oil exposure on basic physiological functions of Persian sturgeon, Acipenser persicus (2021)
    In:  http://aquaticcommons.org/id/eprint/21773 | 18721 | 2017-11-30 07:39:01 | 21773 | University of Guilan, Faculty of Natural Resources, Iran
    Details
    Publication Date: 2021-07-01
    Description: Hematological parameters are suitable biomarkers for evaluating the potential risk of the chemicals. The aim of this study was to investigate of acute crude oil exposure on basic physiological functions of Persian sturgeon,Acipenser persicus. 210 juvenile Persian sturgeon (9.4 ± 1g) were supplied by the Rajaei fish farm in Mazandaran Province, Iran. Juveniles were exposed to the crude oil (15, 16, 17, 18 and 19 ppm). The 96h-LC50 were detected under static condition by SPSS software. Hematological and biochemical parameters were compared between control group and treatment exposed to 96h-LC50. The median lethal concentration was 16.5 ppm in 96 h toxicity test. WBC, RBC, Hb and MCHC decreased, while MCV, MCH and PCV were significantly higher in the treatment which exposed to LC50 concentration (P〈0.01). Results of differential leukocyte count showed that after treatment with LC50 concentration, neutrophils and monocytes increased, while lymphocytes and eosinophils decreased (P〈0.01). Biochemical parameters showed an increase in serum glucose (p〈001). Other parameters including total protein, ALT, AST, ALP and LDH enzymes decreased in treatment group significantly (p〈0.01). Our results provides evidences that crude oil may have disruptive action on the erythropoietic tissue which may be due to its influence on the viability of the cells. Crude oil also inhibited all of the enzymes activities leading to hyperglycemia due to stress inoculation.
    Keywords: Biology ; Chemistry ; Ecology ; Pollution ; acute exposure ; biochemical parameters ; crude oil ; hematology ; persian Sturgeon ; Acipenser persicus ; Caspian Sea ; Iran
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 43-53
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  • 10
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    Effects of acute crude oil exposure on basic physiological functions of Persian sturgeon, Acipenser persicus (2017)
    Details
    Publication Date: 2021-05-19
    Description: Hematological parameters are suitable biomarkers for evaluating the potential risk of the chemicals. The aim of this study was to investigate of acute crude oil exposure on basic physiological functions of Persian sturgeon, Acipenser persicus. 210 juvenile Persian sturgeon (9.4 ± 1g) were supplied by the Rajaei fish farm in Mazandaran Province, Iran. Juveniles were exposed to the crude oil (15, 16, 17, 18 and 19 ppm). The 96h-LC50 were detected under static condition by SPSS software. Hematological and biochemical parameters were compared between control group and treatment exposed to 96h-LC50. The median lethal concentration was 16.5 ppm in 96 h toxicity test. WBC, RBC, Hb and MCHC decreased, while MCV, MCH and PCV were significantly higher in the treatment which exposed to LC50 concentration (P〈0.01). Results of differential leukocyte count showed that after treatment with LC50 concentration, neutrophils and monocytes increased, while lymphocytes and eosinophils decreased (P〈0.01). Biochemical parameters showed an increase in serum glucose (p〈001). Other parameters including total protein, ALT, AST, ALP and LDH enzymes decreased in treatment group significantly (p〈0.01). Our results provides evidences that crude oil may have disruptive action on the erythropoietic tissue which may be due to its influence on the viability of the cells. Crude oil also inhibited all of the enzymes activities leading to hyperglycemia due to stress inoculation.
    Description: Published
    Keywords: Functions ; Acipenser persicus ; Acute exposure ; Crude oil ; Physiological ; Sturgeon ; Persian sturgeon ; Parameters ; Biomarkers ; Enzymes ; Hematology
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.43-53
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