Pub Date : 2021-01-10DOI: 10.22092/IJFS.2021.123477
Sachinandan Dutta, A. Orlov, S. Hazra
In the present paper population structure of four commercially important fishes were studied, namely Tenualosa ilisha, Pampus argenteus, Scomberomorus guttatus and Osteogeneiosus militaris, in the Sundarban Estuary of the northern Bay of Bengal from June 2011 to March 2012. However, a thorough understanding of life history based on length and weight data of these four fishes (617 T. ilisha, 485 P. argenteus, 351 S. guttatus and 416 O. militaris) would be immensely important. Results of such studies would be important for sustainable management of these highly economic biological resources. The analysis of life history parameters of these four species, such as growth, exploitation, mortality, etc. showed that their stocks in coastal waters off West Bengal were overexploited during the study period as exploitation rate of T. ilisha, P. argenteus, S. guttatus and O. militaris were 0.78, 0.62, 0.75 and 0.54 respectively. Widespread fishing of juvenile and growing fish declined the population considerably losing the economic advantage. Good governance, strong law enforcement and effective management system should be sure for actual benefit from the fish resources and improving livelihoods of dependent communities.
{"title":"Research Article: Population biology and exploitation status of four commercially important marine fishes of the northern Bay of Bengal, India","authors":"Sachinandan Dutta, A. Orlov, S. Hazra","doi":"10.22092/IJFS.2021.123477","DOIUrl":"https://doi.org/10.22092/IJFS.2021.123477","url":null,"abstract":"In the present paper population structure of four commercially important fishes were studied, namely Tenualosa ilisha, Pampus argenteus, Scomberomorus guttatus and Osteogeneiosus militaris, in the Sundarban Estuary of the northern Bay of Bengal from June 2011 to March 2012. However, a thorough understanding of life history based on length and weight data of these four fishes (617 T. ilisha, 485 P. argenteus, 351 S. guttatus and 416 O. militaris) would be immensely important. Results of such studies would be important for sustainable management of these highly economic biological resources. The analysis of life history parameters of these four species, such as growth, exploitation, mortality, etc. showed that their stocks in coastal waters off West Bengal were overexploited during the study period as exploitation rate of T. ilisha, P. argenteus, S. guttatus and O. militaris were 0.78, 0.62, 0.75 and 0.54 respectively. Widespread fishing of juvenile and growing fish declined the population considerably losing the economic advantage. Good governance, strong law enforcement and effective management system should be sure for actual benefit from the fish resources and improving livelihoods of dependent communities.","PeriodicalId":14569,"journal":{"name":"Iranian Journal of Fisheries Sciences","volume":"20 1","pages":"62-83"},"PeriodicalIF":0.9,"publicationDate":"2021-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44943022","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-01-10DOI: 10.22092/IJFS.2021.123565
Mazaher Zamani-Faradonbe, Y. Keivany
The genus Garra, a cyprinid fish with eleven confirmed species, is distributed in many Iranian rivers, from western to eastern and southern Iran. Materials for this study were from available published data, data bank provided by Isfahan University of Technology Ichthyological Museum (IUT-IM), and sampling during 2017-2018. Three species, G. lorestanensis, G. typhlops and G. tashanensis live in subterranean waters but other species, such as G. amirhosseini, G. gymnothorax, G. mondica, G. nudiventris, G. persica, G. rossica, G. roseae and G. rufa live in surface waters.
{"title":"Research Article: Biodiversity and distribution of Garra species (Teleostei: Cyprinidae) in Iran","authors":"Mazaher Zamani-Faradonbe, Y. Keivany","doi":"10.22092/IJFS.2021.123565","DOIUrl":"https://doi.org/10.22092/IJFS.2021.123565","url":null,"abstract":"The genus Garra, a cyprinid fish with eleven confirmed species, is distributed in many Iranian rivers, from western to eastern and southern Iran. Materials for this study were from available published data, data bank provided by Isfahan University of Technology Ichthyological Museum (IUT-IM), and sampling during 2017-2018. Three species, G. lorestanensis, G. typhlops and G. tashanensis live in subterranean waters but other species, such as G. amirhosseini, G. gymnothorax, G. mondica, G. nudiventris, G. persica, G. rossica, G. roseae and G. rufa live in surface waters.","PeriodicalId":14569,"journal":{"name":"Iranian Journal of Fisheries Sciences","volume":"20 1","pages":"276-291"},"PeriodicalIF":0.9,"publicationDate":"2021-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47050323","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-01-10DOI: 10.22092/IJFS.2021.351016.0
M. Erfani
Pristinella jenkinae(Stephenson, 1931) is a freshwater cosmopolitan oligochaete. This species was found during limnological investigation in two rivers alongside Iranian coasts and has not been previously reported from Iran’s freshwater fauna and Southern Caspian Sea basin. The specimens of P. jenkinaewere collected bimonthly from Cheshmehkileh and Sardabrood rivers and estuaries (river mouth) using a Van Veen grab (0.03 m2) and Surber (0.1 m2, 0.2 mm-mesh size) samplers at three stations in each estuary (S1: riverine, S2: estuary and S3: marine ecosystem) with three replicates from November 2014 through September 2015. Results of temporal distribution showed that the highest and lowest density and biomass of this species were in January (102.3±68.3 ind m-2 and 0.075±0.034g m-2) and in September (24.4±12.3 ind m-2 and 0.020±0.005g m-2), respectively which were significantly different (N=57, t=0.99, p<0.05). Spatial distribution of P. jenkinae among sampling stations (S1, S2 and S3) showed significant differences (N=57, t=0.99, p<0.05). Freshwater stations (S1) within the river showed higher density and biomass (112.1±64.8 ind m-2 and 0.082±0.035g m-2) than semi-brackish stations (S2) within the estuary (18.8±10.3 ind m-2 and 0.013±0.005g m-2). Semi-brackish stations (S2) showed higher density and biomass than brackish stations (S3) within the sea (0±0 ind m-2 and 0±0g m-2). Density and biomass of this species in Cheshmehkileh River and estuary was more than Sardabrood. A significant correlation (N=57, r=Pearson, p<0.05) between density and biomass of P. jenkinaewith environmental variables was found.
詹基纳普里斯蒂内拉（Pristinella jenkinae，Stephenson，1931）是一种世界性的淡水寡毛动物。该物种是在伊朗海岸附近的两条河流中进行的湖沼学调查中发现的，此前在伊朗淡水动物群和里海南部盆地尚未报告。从2014年11月至2015年9月，使用Van Veen抓斗（0.03 m2）和Surber（0.1 m2，0.2 mm网目大小）采样器，在每个河口的三个站点（S1：河流，S2：河口和S3：海洋生态系统），每两个月从Cheshmehkileh和Sardabrood河和河口（河口）采集一次江豚标本，共三次重复。时间分布结果表明，该物种的密度和生物量最高和最低分别为1月（102.3±68.3 ind m-2和0.075±0.034g m-2）和9月（24.4±12.3 ind m-2和0.020±0.005g m-2，不同采样站（S1、S2和S3）间的江豚种群空间分布存在显著差异（N=57，t=0.99，p<0.05）。河内淡水站（S1）的密度和生物量（112.1±64.8 ind m-2和0.082±0.035g m-2）高于河口半咸水站（S2）（18.8±10.3 ind m-2和0.013±0.005g m-2）。半咸水站（S2）的密度和生物量高于海水中的咸水站（S3）（0±0 ind m-2和0±0 g m-2）。Cheshmehkille河和河口的密度和生物量均大于Sardabrood。詹金纳的密度和生物量与环境变量之间存在显著相关性（N=57，r=Pearson，p<0.05）。
{"title":"Research Article: New report for Pristinella jenkinae Stephenson, 1931 (Annelida: Oligochaeta: Naididae) geographical distribution from Southern Caspian Sea basin, Mazandaran province -Iran","authors":"M. Erfani","doi":"10.22092/IJFS.2021.351016.0","DOIUrl":"https://doi.org/10.22092/IJFS.2021.351016.0","url":null,"abstract":"Pristinella jenkinae(Stephenson, 1931) is a freshwater cosmopolitan oligochaete. This species was found during limnological investigation in two rivers alongside Iranian coasts and has not been previously reported from Iran’s freshwater fauna and Southern Caspian Sea basin. The specimens of P. jenkinaewere collected bimonthly from Cheshmehkileh and Sardabrood rivers and estuaries (river mouth) using a Van Veen grab (0.03 m2) and Surber (0.1 m2, 0.2 mm-mesh size) samplers at three stations in each estuary (S1: riverine, S2: estuary and S3: marine ecosystem) with three replicates from November 2014 through September 2015. Results of temporal distribution showed that the highest and lowest density and biomass of this species were in January (102.3±68.3 ind m-2 and 0.075±0.034g m-2) and in September (24.4±12.3 ind m-2 and 0.020±0.005g m-2), respectively which were significantly different (N=57, t=0.99, p<0.05). Spatial distribution of P. jenkinae among sampling stations (S1, S2 and S3) showed significant differences (N=57, t=0.99, p<0.05). Freshwater stations (S1) within the river showed higher density and biomass (112.1±64.8 ind m-2 and 0.082±0.035g m-2) than semi-brackish stations (S2) within the estuary (18.8±10.3 ind m-2 and 0.013±0.005g m-2). Semi-brackish stations (S2) showed higher density and biomass than brackish stations (S3) within the sea (0±0 ind m-2 and 0±0g m-2). Density and biomass of this species in Cheshmehkileh River and estuary was more than Sardabrood. A significant correlation (N=57, r=Pearson, p<0.05) between density and biomass of P. jenkinaewith environmental variables was found.","PeriodicalId":14569,"journal":{"name":"Iranian Journal of Fisheries Sciences","volume":"20 1","pages":"109-128"},"PeriodicalIF":0.9,"publicationDate":"2021-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43467673","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-01-10DOI: 10.22092/IJFS.2021.351036.0
M. Hafezieh, A. M. Abkenar, S. Jadgal, Ashkan Azhdari
More than 3000 MT of Sargassum illicifolium ,annually washed-up from the Oman Sea (Sistan and Baluchestan province). , According to the estimates of the Iranian Fisheries Sciences Researchinstitiute.The brown seaweed biomass has been considered as one of the best free sources for production of sodium alginate. A key objective of this study was to determine the biochemical composition of Sargassum illicifolium collected from Chabahar Bay in November 2018and to understand the economic potential and cost drivers of sodium alginate on basis of the present macroalgae. Alginates were purified by re-precipitation with ethanol and characterized by infrared spectroscopy. The results showed that the Chabahar Sargassum was characterized by total protein (TP), total lipid (TL) and carbohydrate as 9.8±0.8%, 4.4±0.2% and 33.2±4.1% dry weight, respectively. The ash content contained 41.6±2.3% DW. Moreover, the n-6/n-3 ratio was 2.62 and total essential amino acids and total minerals were 29.1±0.2 mg g-1 DW and 102. 2±0.6 mg g-1 DW, respectively. sodium alginate of Sargassum illicifolium was found to be high as 28.2% purification with molecular weight of 8.06×105 g mol-1. Its total production price was evaluated 7.66 $ per kg sodium alginate, which is much cheaper than existing ones on the Iranian market.
{"title":"Biochemical composition and investigation on the economic feasibility of sodium alginate production of brown seaweed Sargassum illicifolium (Turner) C. Agardh, 1820 from Chabahar Bay (Gulf of Oman, Iran)","authors":"M. Hafezieh, A. M. Abkenar, S. Jadgal, Ashkan Azhdari","doi":"10.22092/IJFS.2021.351036.0","DOIUrl":"https://doi.org/10.22092/IJFS.2021.351036.0","url":null,"abstract":"More than 3000 MT of Sargassum illicifolium ,annually washed-up from the Oman Sea (Sistan and Baluchestan province). , According to the estimates of the Iranian Fisheries Sciences Researchinstitiute.The brown seaweed biomass has been considered as one of the best free sources for production of sodium alginate. A key objective of this study was to determine the biochemical composition of Sargassum illicifolium collected from Chabahar Bay in November 2018and to understand the economic potential and cost drivers of sodium alginate on basis of the present macroalgae. Alginates were purified by re-precipitation with ethanol and characterized by infrared spectroscopy. The results showed that the Chabahar Sargassum was characterized by total protein (TP), total lipid (TL) and carbohydrate as 9.8±0.8%, 4.4±0.2% and 33.2±4.1% dry weight, respectively. The ash content contained 41.6±2.3% DW. Moreover, the n-6/n-3 ratio was 2.62 and total essential amino acids and total minerals were 29.1±0.2 mg g-1 DW and 102. 2±0.6 mg g-1 DW, respectively. sodium alginate of Sargassum illicifolium was found to be high as 28.2% purification with molecular weight of 8.06×105 g mol-1. Its total production price was evaluated 7.66 $ per kg sodium alginate, which is much cheaper than existing ones on the Iranian market.","PeriodicalId":14569,"journal":{"name":"Iranian Journal of Fisheries Sciences","volume":"20 1","pages":"1-12"},"PeriodicalIF":0.9,"publicationDate":"2021-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44058416","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-12-06DOI: 10.22092/IJFS.2020.122952
Saiwan Rezaee, E. R. Ghatrami, H. Farahmand, I. Zamani
Farming of the pacific white leg shrimp (Penaeus vannamei), consists the greatest percent of aquaculture production of crustaceans all over the world. Vibriosis caused by Vibrio species such as Vibrio alginolyticus, is a serious limiting agent for aquaculture. Phage therapy is an eco-friendly alternative to antibiotics as a prophylactic measure for the growth of pathogenic bacteria. The aim of this study was isolation and characterization of Vibriophages present in Litopenaeus vannamei breeding and culture facilities and estuarine resources in south west of Iran, Choebdeh shrimp farming site of Abadan city, Khuzestan Province, based on morphological structure, biological conditions and their potential applications in lysis of Vibrio bacteria. The bacterial and phage samples were analyzed using different physicochemical parameters, 16S rRNA gene sequencing and TEM. The results showed the V. alginolyticus isolates and identified the Podoviridae family of phages. These bacterial isolates were resistant to ampicillin and penicillin. The efficacy of the Podoviridae phage against V. alginolyticus bacterium indicated that this phage has a short period of 30 minutes latent phase, possessed a desirable stability and growth in keeping for 1 hour at 30-55oC, the salinity of 0.5-10 and pH of 5-8. Based on evaluation of phage therapy, mean absorbance values (OD600), in control and treatment groups, at 12 and 24 hours after phage inoculation, were significantly different (p <0.05). According to the results, phage therapy with single-phage suspensions did not prevent bacterial regrowth after treatment. However, delay in development of resistance is a desirable success.
{"title":"Characterization of Vibrio alginolyticus bacteriophage recovered from shrimp ponds in south west of Iran","authors":"Saiwan Rezaee, E. R. Ghatrami, H. Farahmand, I. Zamani","doi":"10.22092/IJFS.2020.122952","DOIUrl":"https://doi.org/10.22092/IJFS.2020.122952","url":null,"abstract":"Farming of the pacific white leg shrimp (Penaeus vannamei), consists the greatest percent of aquaculture production of crustaceans all over the world. Vibriosis caused by Vibrio species such as Vibrio alginolyticus, is a serious limiting agent for aquaculture. Phage therapy is an eco-friendly alternative to antibiotics as a prophylactic measure for the growth of pathogenic bacteria. The aim of this study was isolation and characterization of Vibriophages present in Litopenaeus vannamei breeding and culture facilities and estuarine resources in south west of Iran, Choebdeh shrimp farming site of Abadan city, Khuzestan Province, based on morphological structure, biological conditions and their potential applications in lysis of Vibrio bacteria. The bacterial and phage samples were analyzed using different physicochemical parameters, 16S rRNA gene sequencing and TEM. The results showed the V. alginolyticus isolates and identified the Podoviridae family of phages. These bacterial isolates were resistant to ampicillin and penicillin. The efficacy of the Podoviridae phage against V. alginolyticus bacterium indicated that this phage has a short period of 30 minutes latent phase, possessed a desirable stability and growth in keeping for 1 hour at 30-55oC, the salinity of 0.5-10 and pH of 5-8. Based on evaluation of phage therapy, mean absorbance values (OD600), in control and treatment groups, at 12 and 24 hours after phage inoculation, were significantly different (p <0.05). According to the results, phage therapy with single-phage suspensions did not prevent bacterial regrowth after treatment. However, delay in development of resistance is a desirable success.","PeriodicalId":14569,"journal":{"name":"Iranian Journal of Fisheries Sciences","volume":"19 1","pages":"3183-3200"},"PeriodicalIF":0.9,"publicationDate":"2020-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45354574","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-12-01DOI: 10.22092/IJFS.2020.122924
Đ. Đorđević, H. Buchtová
The aim of the study was to access the influence of nigiri sushi meal ingredients ratio on its weight, nutritional profile, physic-chemical characteristics (crude protein, lipid content, ash content, salt content, phosphorus content and thiobarbituric acid assay) and to estimate the usage of citrate synthase activity as freshness index of seafood used for sushi preparation. Nutrition composition of nigiri sushi is highly influence by rice/seafood ratio. Inclusion of processed seafood in sushi can influence significantly weight and consequently nutritional profile of nigiri sushi meal as well. Shrimp cooking resulted in 16.45±3.29% weight loss in whole non-deveined shrimp and 13.03±3.40% in non-deveined shrimp tail. Nigiri sushi meal prepared with salmon and tuna fish can be recognized as good sources of seafood. Nigiri sushi meal can be considered as a low-calorie meal (nigiri salmon: 716.13±24.18 kJ/100g; nigiri tuna: 638.12±10.64 kJ/100g; nigiri shrimp: 672.06 ± 8.72 kJ/100g) but on the contrary it cannot be considered as low salt content meal (nigiri salmon: 0.97±0.04%; nigiri tuna: 0.89±0.10%; nigiri shrimp: 1.06±0.13%). Citrate synthase activity (CSA) increases after each freezing/thawing cycle and at the end (4th cycle) were 5.29±0.67 μmol/mL/min and 6.67±0.63 μmol/mL/min in tuna and salmon samples, respectively. CSA can be recognized as reliable enzymatic kit indicator for fish freshness determination in nigiri sushi meal.
{"title":"Nutritional profile of nigiri sushi meal and the usage of citrate synthase activity as freshness parameter","authors":"Đ. Đorđević, H. Buchtová","doi":"10.22092/IJFS.2020.122924","DOIUrl":"https://doi.org/10.22092/IJFS.2020.122924","url":null,"abstract":"The aim of the study was to access the influence of nigiri sushi meal ingredients ratio on its weight, nutritional profile, physic-chemical characteristics (crude protein, lipid content, ash content, salt content, phosphorus content and thiobarbituric acid assay) and to estimate the usage of citrate synthase activity as freshness index of seafood used for sushi preparation. Nutrition composition of nigiri sushi is highly influence by rice/seafood ratio. Inclusion of processed seafood in sushi can influence significantly weight and consequently nutritional profile of nigiri sushi meal as well. Shrimp cooking resulted in 16.45±3.29% weight loss in whole non-deveined shrimp and 13.03±3.40% in non-deveined shrimp tail. Nigiri sushi meal prepared with salmon and tuna fish can be recognized as good sources of seafood. Nigiri sushi meal can be considered as a low-calorie meal (nigiri salmon: 716.13±24.18 kJ/100g; nigiri tuna: 638.12±10.64 kJ/100g; nigiri shrimp: 672.06 ± 8.72 kJ/100g) but on the contrary it cannot be considered as low salt content meal (nigiri salmon: 0.97±0.04%; nigiri tuna: 0.89±0.10%; nigiri shrimp: 1.06±0.13%). Citrate synthase activity (CSA) increases after each freezing/thawing cycle and at the end (4th cycle) were 5.29±0.67 μmol/mL/min and 6.67±0.63 μmol/mL/min in tuna and salmon samples, respectively. CSA can be recognized as reliable enzymatic kit indicator for fish freshness determination in nigiri sushi meal.","PeriodicalId":14569,"journal":{"name":"Iranian Journal of Fisheries Sciences","volume":" ","pages":""},"PeriodicalIF":0.9,"publicationDate":"2020-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45620250","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-12-01DOI: 10.22092/IJFS.2020.122925
Qiao Xinmei, Hai Zhou, X. Leng, Du Hao, Jinming Wu, Shan He, Xu-fang Liang, Q. Wei, Qingsong Tan
Low fertilization rate and hatchability of cultured Dabry’s sturgeon, Acipenser dabryanus,are bottlenecks to the fish species protection, while adequate nutrients in body of subadult fish are crucial to successful reproduction. The present study was conducted to preliminarily understand the nutritional status of male and female subadults by characterizing the proximate composition, fatty acid and amino acid profiles in muscle, liver and gonad of farmed Dabry’s sturgeon with gonads at stage II through chemical analysis, gas chromatograph and high pressure liquid chromatography. The results showed that lipid content (47.24%) in gonad of females was significantly higher than those in liver (29.26%) and muscle (7.72%), while lipid content (39.43%) in liver of males was significantly higher than those in gonad (18.40%) and muscle (6.68%) (p<0.05). The protein content (5.81%) in gonad of females was significantly lower than those in liver (10.77%) and muscle (22.82), while protein contents in gonad (9.23%) and liver (8.72%) of males were significantly lower than that in muscle (20.83%) (p<0.05). The contents of docosahexaenoic acid (DHA) and eicosapentaenoic acid (EPA) in gonad and muscle were the most abundant n-3 polyunsaturated fatty acids (n-3 PUFAs). The content of arachidonic acid (ARA, 0.65%) in gonad of females was significantly higher (0.33%) than that in gonad of males (p<0.05). The results suggest that lipid and highly unsaturated fatty acids, such as ARA, EPA and DHA are accumulated in the gonads at stage II, which may play pivotal roles in gonad development.
{"title":"Nutrient distribution in different tissues of subadult Dabry’s sturgeon, Acipenser dabryanus (Duméril, 1869)","authors":"Qiao Xinmei, Hai Zhou, X. Leng, Du Hao, Jinming Wu, Shan He, Xu-fang Liang, Q. Wei, Qingsong Tan","doi":"10.22092/IJFS.2020.122925","DOIUrl":"https://doi.org/10.22092/IJFS.2020.122925","url":null,"abstract":"Low fertilization rate and hatchability of cultured Dabry’s sturgeon, Acipenser dabryanus,are bottlenecks to the fish species protection, while adequate nutrients in body of subadult fish are crucial to successful reproduction. The present study was conducted to preliminarily understand the nutritional status of male and female subadults by characterizing the proximate composition, fatty acid and amino acid profiles in muscle, liver and gonad of farmed Dabry’s sturgeon with gonads at stage II through chemical analysis, gas chromatograph and high pressure liquid chromatography. The results showed that lipid content (47.24%) in gonad of females was significantly higher than those in liver (29.26%) and muscle (7.72%), while lipid content (39.43%) in liver of males was significantly higher than those in gonad (18.40%) and muscle (6.68%) (p<0.05). The protein content (5.81%) in gonad of females was significantly lower than those in liver (10.77%) and muscle (22.82), while protein contents in gonad (9.23%) and liver (8.72%) of males were significantly lower than that in muscle (20.83%) (p<0.05). The contents of docosahexaenoic acid (DHA) and eicosapentaenoic acid (EPA) in gonad and muscle were the most abundant n-3 polyunsaturated fatty acids (n-3 PUFAs). The content of arachidonic acid (ARA, 0.65%) in gonad of females was significantly higher (0.33%) than that in gonad of males (p<0.05). The results suggest that lipid and highly unsaturated fatty acids, such as ARA, EPA and DHA are accumulated in the gonads at stage II, which may play pivotal roles in gonad development.","PeriodicalId":14569,"journal":{"name":"Iranian Journal of Fisheries Sciences","volume":"95 6","pages":""},"PeriodicalIF":0.9,"publicationDate":"2020-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41271375","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-11-30DOI: 10.22092/IJFS.2020.122923
S. Eagderi, B. M. Amiri, H. Poorbagher, N. Mobin, N. Pourang
The present study investigated the effects of Cd, Cu and Zn on the sperm motility of Caspiomyzon wagneri. The sperm of the specimens were exposed to 0.01, 0.1, 1, 10, 100 and 1000 mg L-1 of the heavy metals, and the duration of sperm motility and percentage of motile sperms were measured using a compound microscope and digital camera. Based on the results, sperm motility parameters decreased with increasing the concentrations of heavy metals. A concentration of 1000 mg L-1 of heavy metals stopped completely the motile sperms. The present study indicated that heavy metals have detrimental effects on sperm motility and possibly decrease the fertilization and hatching rates of C. wagneri in the spawning ground, and thus a serious threat to the survival of this rare and native species.
{"title":"Effects of Cd, Cu and Zn on sperm motility indicators of the Caspian lamprey, Caspiomyzon wagneri","authors":"S. Eagderi, B. M. Amiri, H. Poorbagher, N. Mobin, N. Pourang","doi":"10.22092/IJFS.2020.122923","DOIUrl":"https://doi.org/10.22092/IJFS.2020.122923","url":null,"abstract":"The present study investigated the effects of Cd, Cu and Zn on the sperm motility of Caspiomyzon wagneri. The sperm of the specimens were exposed to 0.01, 0.1, 1, 10, 100 and 1000 mg L-1 of the heavy metals, and the duration of sperm motility and percentage of motile sperms were measured using a compound microscope and digital camera. Based on the results, sperm motility parameters decreased with increasing the concentrations of heavy metals. A concentration of 1000 mg L-1 of heavy metals stopped completely the motile sperms. The present study indicated that heavy metals have detrimental effects on sperm motility and possibly decrease the fertilization and hatching rates of C. wagneri in the spawning ground, and thus a serious threat to the survival of this rare and native species.","PeriodicalId":14569,"journal":{"name":"Iranian Journal of Fisheries Sciences","volume":" ","pages":""},"PeriodicalIF":0.9,"publicationDate":"2020-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43496301","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-11-10DOI: 10.22092/IJFS.2020.350834.0
E. Mahdipour, Alavi-Yeganeh, I. Sharifpour, H. Ahnelt
This study provides fundamental information on some key aspects of the reproductive biology of Neogobius caspius, a Caspian Sea endemic, poorly studied Gobiidae fish species. In total, 222 specimens were captured monthly from Noor coastal waters in southern part of the Caspian Sea from April to October 2016, while water parameters (temperature, salinity and pH) were monitored weekly. Gonadosomatic and hepatosomatic indices suggested that the reproductive period of this species was in April to May. Peak of Fulton and Clark’s condition factors appeared in April and May for female and male specimens, respectively, then a declining trend appeared until June that remained constant until the end of October. Absolute fecundity ranged from 418 to 1798 oocytes per individual (mean: 1013±357 (SD) oocytes, n=41), which was highly related to the length and weight of fish and weight of gonads. Oocyte mean diameter ranged 35.85±11.80 µm in immature stage to 1103.86±172.01 µm in mature stage. Five stages of maturity for female and four stages for male specimens were described based on macroscopic features and histological description. N. caspius appeared as an iteroparous and a batch spawner species, producing more than one oocyte clutch in a single reproductive season.
{"title":"Reproductive biology of Caspian goby, Neogobius caspius (Eichwald, 1831) in the southern Caspian Sea (Noor beach)","authors":"E. Mahdipour, Alavi-Yeganeh, I. Sharifpour, H. Ahnelt","doi":"10.22092/IJFS.2020.350834.0","DOIUrl":"https://doi.org/10.22092/IJFS.2020.350834.0","url":null,"abstract":"This study provides fundamental information on some key aspects of the reproductive biology of Neogobius caspius, a Caspian Sea endemic, poorly studied Gobiidae fish species. In total, 222 specimens were captured monthly from Noor coastal waters in southern part of the Caspian Sea from April to October 2016, while water parameters (temperature, salinity and pH) were monitored weekly. Gonadosomatic and hepatosomatic indices suggested that the reproductive period of this species was in April to May. Peak of Fulton and Clark’s condition factors appeared in April and May for female and male specimens, respectively, then a declining trend appeared until June that remained constant until the end of October. Absolute fecundity ranged from 418 to 1798 oocytes per individual (mean: 1013±357 (SD) oocytes, n=41), which was highly related to the length and weight of fish and weight of gonads. Oocyte mean diameter ranged 35.85±11.80 µm in immature stage to 1103.86±172.01 µm in mature stage. Five stages of maturity for female and four stages for male specimens were described based on macroscopic features and histological description. N. caspius appeared as an iteroparous and a batch spawner species, producing more than one oocyte clutch in a single reproductive season.","PeriodicalId":14569,"journal":{"name":"Iranian Journal of Fisheries Sciences","volume":"19 1","pages":"3345-3363"},"PeriodicalIF":0.9,"publicationDate":"2020-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44764405","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-11-10DOI: 10.22092/IJFS.2020.122660
A. Mirzajani, S. Abdolmalaki, J. D. Roohi, H. Babaei, A. Abedini, M. Borani
The Iran Water Resources Management Company constructs many dams to control surface water that provide a new potential for aquaculture activities. Trophic status index and natural potential for fish production were investigated in nine small dam reservoirs from northwest of Iran. Prediction of fish productivity was calculated based on phytoplankton biomass (using chlorophyll a concentration in water; p Chl-a) and benthic macro invertebrate biomass (p BMI). Average p Chl-a and p BMI of reservoirs were estimated as 233.9±479.4 kg ha-1yr-1 and 14.76±19.18 kg ha-1yr-1 respectively. Concentrations of total phosphorus and total nitrogen varied between 0.023-0.345 and 0.42-3.58 mgl-1, respectively. According to Carlson's transformed model (TSIPN) the mesotrophic status was dominant in reservoirs in which TSIPN varied between 38.7 and 51.2. The eutrophication trend seems to be very fast in these reservoirs because of high nutrient input by aquacultures activities. The usage of fertilizers and amounts of food for aquaculture proposes and expansions of exotic species decline the natural fisheries potential of these reservoirs. Maintenance of water quality and investigation of native species should be planned to preserve sustainable fisheries activities in these reservoirs.
{"title":"Trophic status index and natural fisheries potential of some Iranian reservoirs.","authors":"A. Mirzajani, S. Abdolmalaki, J. D. Roohi, H. Babaei, A. Abedini, M. Borani","doi":"10.22092/IJFS.2020.122660","DOIUrl":"https://doi.org/10.22092/IJFS.2020.122660","url":null,"abstract":"The Iran Water Resources Management Company constructs many dams to control surface water that provide a new potential for aquaculture activities. Trophic status index and natural potential for fish production were investigated in nine small dam reservoirs from northwest of Iran. Prediction of fish productivity was calculated based on phytoplankton biomass (using chlorophyll a concentration in water; p Chl-a) and benthic macro invertebrate biomass (p BMI). Average p Chl-a and p BMI of reservoirs were estimated as 233.9±479.4 kg ha-1yr-1 and 14.76±19.18 kg ha-1yr-1 respectively. Concentrations of total phosphorus and total nitrogen varied between 0.023-0.345 and 0.42-3.58 mgl-1, respectively. According to Carlson's transformed model (TSIPN) the mesotrophic status was dominant in reservoirs in which TSIPN varied between 38.7 and 51.2. The eutrophication trend seems to be very fast in these reservoirs because of high nutrient input by aquacultures activities. The usage of fertilizers and amounts of food for aquaculture proposes and expansions of exotic species decline the natural fisheries potential of these reservoirs. Maintenance of water quality and investigation of native species should be planned to preserve sustainable fisheries activities in these reservoirs.","PeriodicalId":14569,"journal":{"name":"Iranian Journal of Fisheries Sciences","volume":"19 1","pages":"2753-2769"},"PeriodicalIF":0.9,"publicationDate":"2020-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44879234","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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