Pub Date : 2020-09-10DOI: 10.22092/IJFS.2020.122455
A. Arshadi, A. Gharaei, J. M. Harijani
Vitamin E (VE) is one of the most important micronutrients that influence the performance of shrimp reproduction. The effects of different dietary VE levels (0, 100, 300 and 500 mg kg-1) were investigated on the reproductive performance and vitellogenin (Vg) gene expression in Litopenaeus vannamei females which were co-fed with fresh food (two times daily) or experimental diets (two times daily) for 30 days. Sampling was carried out at the first day of the trial, prior to eyestalk ablation (ESA) (day 21) and after ESA (day 30). The reproductive parameters including hepatopancreatic index, absolute fecundity, egg diameter, latency period, and Vg gene expression were higher in the shrimp fed with VE supplemented diets than the control group (p <0.05). After ESA, the Vg gene expression significantly increased in all groups (p <0.05). As a measure of reproductive status of Pacific white shrimp, the present study evaluated correlations of Vg gene expression in hepatopancreas with the number and diameter of oocytes in gonads. Accordingly, Vg is a precursor of vitellin, which is the major yolk protein accumulated in ooplasm. These results provide evidence that dietary VE with 300 mg kg-1 may present a novel strategy and play a positive impact on reproductive performance and Vg gene expression of female shrimp.
{"title":"Effect of dietary vitamin E on reproductive performance and vitellogenin gene expression in broodstock of Litopenaeus vannamei","authors":"A. Arshadi, A. Gharaei, J. M. Harijani","doi":"10.22092/IJFS.2020.122455","DOIUrl":"https://doi.org/10.22092/IJFS.2020.122455","url":null,"abstract":"Vitamin E (VE) is one of the most important micronutrients that influence the performance of shrimp reproduction. The effects of different dietary VE levels (0, 100, 300 and 500 mg kg-1) were investigated on the reproductive performance and vitellogenin (Vg) gene expression in Litopenaeus vannamei females which were co-fed with fresh food (two times daily) or experimental diets (two times daily) for 30 days. Sampling was carried out at the first day of the trial, prior to eyestalk ablation (ESA) (day 21) and after ESA (day 30). The reproductive parameters including hepatopancreatic index, absolute fecundity, egg diameter, latency period, and Vg gene expression were higher in the shrimp fed with VE supplemented diets than the control group (p <0.05). After ESA, the Vg gene expression significantly increased in all groups (p <0.05). As a measure of reproductive status of Pacific white shrimp, the present study evaluated correlations of Vg gene expression in hepatopancreas with the number and diameter of oocytes in gonads. Accordingly, Vg is a precursor of vitellin, which is the major yolk protein accumulated in ooplasm. These results provide evidence that dietary VE with 300 mg kg-1 may present a novel strategy and play a positive impact on reproductive performance and Vg gene expression of female shrimp.","PeriodicalId":14569,"journal":{"name":"Iranian Journal of Fisheries Sciences","volume":"19 1","pages":"2475-2492"},"PeriodicalIF":0.9,"publicationDate":"2020-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49314137","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 : 2020-09-10DOI: 10.22092/IJFS.2020.122204
Y. Fatemi
This paper presents the first record of Metalia persica, (Mortensen, 1940) from the Gulf of Oman. The new record extends geographical distribution range of this spatangoid species to the eastward. Morphological and ecological notes as well as the distribution range of M. persica are also provided.
{"title":"New record and range expansion of a rare spatangoid species, Metalia persica (Mortensen, 1940) (Echinoidea, Brissidae) from the Oman Sea","authors":"Y. Fatemi","doi":"10.22092/IJFS.2020.122204","DOIUrl":"https://doi.org/10.22092/IJFS.2020.122204","url":null,"abstract":"This paper presents the first record of Metalia persica, (Mortensen, 1940) from the Gulf of Oman. The new record extends geographical distribution range of this spatangoid species to the eastward. Morphological and ecological notes as well as the distribution range of M. persica are also provided.","PeriodicalId":14569,"journal":{"name":"Iranian Journal of Fisheries Sciences","volume":"19 1","pages":"2730-2734"},"PeriodicalIF":0.9,"publicationDate":"2020-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42107484","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 : 2020-09-10DOI: 10.22092/IJFS.2020.122632
Nazia Qamar, S. Panhwar, Ping Wang
An analysis of sexual pattern, spawning ecology, and size at sexual maturity in two queenfishes (Talang queenfish, Scomberoides commersonnianus and needlescaled queenfish, S. tol) was made. Fish samples were collected monthly by gillnet and trawls from the northern Arabian Sea coast of Pakistan from July 2013 to June 2014. The gonad maturity was categorized in six developmental stages based on visual analysis (colour, morphology) and histological screening of the gonads. The males of Talang queenfish dominated the population with a ratio of 1:0.4 (♂ to ♀) whereas females were higher (1:1.6) in needlescaled queenfish population. Talang queenfish was reproductively active during summer with a peak in June and winter spawning season, which appeared from November to February. Needlescaled queenfish is repeatedly spawner, appeared to be in spawning in the summer and fall. Estimated size-at-sexual-maturity for Talang and needlescaled queenfish suggests that the minimum legal length (MLL) should not be set lower than 35, 38 cm TL respectively. This conservative MLL, equal to or more than a length at functional maturity of both queenfish species would safeguard immature individuals until they reach a size at which they can contribute to the reproductive capacity of the populations in the northern Arabian Sea coast.
{"title":"Reproduction, sexual maturity, and spawning ecology of Talang, Scomberoides commersonnianus, and Needlescaled queenfish, Scomberoides tol in Pakistan","authors":"Nazia Qamar, S. Panhwar, Ping Wang","doi":"10.22092/IJFS.2020.122632","DOIUrl":"https://doi.org/10.22092/IJFS.2020.122632","url":null,"abstract":"An analysis of sexual pattern, spawning ecology, and size at sexual maturity in two queenfishes (Talang queenfish, Scomberoides commersonnianus and needlescaled queenfish, S. tol) was made. Fish samples were collected monthly by gillnet and trawls from the northern Arabian Sea coast of Pakistan from July 2013 to June 2014. The gonad maturity was categorized in six developmental stages based on visual analysis (colour, morphology) and histological screening of the gonads. The males of Talang queenfish dominated the population with a ratio of 1:0.4 (♂ to ♀) whereas females were higher (1:1.6) in needlescaled queenfish population. Talang queenfish was reproductively active during summer with a peak in June and winter spawning season, which appeared from November to February. Needlescaled queenfish is repeatedly spawner, appeared to be in spawning in the summer and fall. Estimated size-at-sexual-maturity for Talang and needlescaled queenfish suggests that the minimum legal length (MLL) should not be set lower than 35, 38 cm TL respectively. This conservative MLL, equal to or more than a length at functional maturity of both queenfish species would safeguard immature individuals until they reach a size at which they can contribute to the reproductive capacity of the populations in the northern Arabian Sea coast.","PeriodicalId":14569,"journal":{"name":"Iranian Journal of Fisheries Sciences","volume":"19 1","pages":"2705-2719"},"PeriodicalIF":0.9,"publicationDate":"2020-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42382686","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 : 2020-09-10DOI: 10.22092/IJFS.2020.122454
S. Sanaee, S. Omidzahir, A. S. Shirazi, M. Akhoundian
The Caspian seal (Pusa caspica) from Phocidae family is the only living mammal that exclusively inhabits the landlocked Caspian Sea. This study was first of its kind conducted on the Caspian seals in the southeastern region of the Caspian Sea from 2010 to 2016. Seasonal observations, gender, maturity, biometric parameters and condition index of each observed Caspian seal were studied. Totally 74 live Caspian seals including 42 males and 32 females were observed in this study. The Caspian seals observed in autumn were significantly greater in number than in the other seasons (p 0.05), however, the number of juvenile seals were significantly more than adults (p 0.05). A significant difference was observed between adult and juvenile seals in biometric parameters (p 0.05). Since Caspian seals are listed as endangered species in the IUCN Red List, further research is required to understand the status of this population and conserve the only mammals of the Caspian Sea.
{"title":"Seasonal distribution and some biological parameters of the Caspian seal (Pusa caspica) in the southeastern region of the Caspian Sea","authors":"S. Sanaee, S. Omidzahir, A. S. Shirazi, M. Akhoundian","doi":"10.22092/IJFS.2020.122454","DOIUrl":"https://doi.org/10.22092/IJFS.2020.122454","url":null,"abstract":"The Caspian seal (Pusa caspica) from Phocidae family is the only living mammal that exclusively inhabits the landlocked Caspian Sea. This study was first of its kind conducted on the Caspian seals in the southeastern region of the Caspian Sea from 2010 to 2016. Seasonal observations, gender, maturity, biometric parameters and condition index of each observed Caspian seal were studied. Totally 74 live Caspian seals including 42 males and 32 females were observed in this study. The Caspian seals observed in autumn were significantly greater in number than in the other seasons (p 0.05), however, the number of juvenile seals were significantly more than adults (p 0.05). A significant difference was observed between adult and juvenile seals in biometric parameters (p 0.05). Since Caspian seals are listed as endangered species in the IUCN Red List, further research is required to understand the status of this population and conserve the only mammals of the Caspian Sea.","PeriodicalId":14569,"journal":{"name":"Iranian Journal of Fisheries Sciences","volume":"19 1","pages":"2464-2474"},"PeriodicalIF":0.9,"publicationDate":"2020-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43827858","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 : 2020-09-10DOI: 10.22092/IJFS.2019.118132
M. Gholizadeh, M. Heydarzadeh
Feeding strategies are typical traits reflecting the adaptation of species to environmental conditions. The aim of this paper was finding of proof that functional feeding groups the benthic macroinvertebrates can be unitized as surrogate for biological assessment. The composition and abundance of functional feeding groups of the benthic macroinvertebrate assemblages were surveyed along the Zarin-Gol River, Iran during winter and spring 2016. Benthic samples were collected using Surber sampler (900 cm2 area) with 3 replicates in 5 stations (agriculture, rural area, forest, fish culture and reference site). Ten environmental parameters including (temperature, Dissolved oxygen, pH, Electric conductivity, etc.) of each station were assessed. A total of abundance (901 individuals) belonging to 30 families and 9 orders were identified. In terms of relative abundance, Collector/Gatherer and Collector/ Filter were the predominant groups at most sampling stations. Shredders had low abundance in all stations and were absent in station two. Principal component analysis and cluster ordination showed that there are two distinct groups of benthic and stations. The implication of the observed pattern of variation in the abundance of functional feeding groups were discussed regarding to the ecosystem functions and water quality assessment.
{"title":"Functional feeding groups of macroinvertebrates and their relationship with environmental parameters, case study: in Zarin-Gol River","authors":"M. Gholizadeh, M. Heydarzadeh","doi":"10.22092/IJFS.2019.118132","DOIUrl":"https://doi.org/10.22092/IJFS.2019.118132","url":null,"abstract":"Feeding strategies are typical traits reflecting the adaptation of species to environmental conditions. The aim of this paper was finding of proof that functional feeding groups the benthic macroinvertebrates can be unitized as surrogate for biological assessment. The composition and abundance of functional feeding groups of the benthic macroinvertebrate assemblages were surveyed along the Zarin-Gol River, Iran during winter and spring 2016. Benthic samples were collected using Surber sampler (900 cm2 area) with 3 replicates in 5 stations (agriculture, rural area, forest, fish culture and reference site). Ten environmental parameters including (temperature, Dissolved oxygen, pH, Electric conductivity, etc.) of each station were assessed. A total of abundance (901 individuals) belonging to 30 families and 9 orders were identified. In terms of relative abundance, Collector/Gatherer and Collector/ Filter were the predominant groups at most sampling stations. Shredders had low abundance in all stations and were absent in station two. Principal component analysis and cluster ordination showed that there are two distinct groups of benthic and stations. The implication of the observed pattern of variation in the abundance of functional feeding groups were discussed regarding to the ecosystem functions and water quality assessment.","PeriodicalId":14569,"journal":{"name":"Iranian Journal of Fisheries Sciences","volume":"19 1","pages":"2532-2543"},"PeriodicalIF":0.9,"publicationDate":"2020-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42691293","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 : 2020-09-10DOI: 10.22092/IJFS.2019.119140
A. Laith, Ambak, A. Jabar, M. Najiah
The potential of milky mangrove Excoecaria agallocha leaf extracts has been utilized in traditional medicine in various parts of the world. Blood is an important indicator of health and is a pathological mirror of the entire body. Therefore, the effects of E. agallocha leaf extract on hematology indices of hybrid tilapia (Oreochromis niloticus) were investigated. Experimental fish were randomly divided into seven groups. Groups 1 to 5 were fed medicated feed at five different concentrations (10, 20, 30, 40 and 50 mg kg-1) of E. agallocha leaf extract. Group 6 was given Flumequine (25 mg kg-1) and group 7 was fed with untreated feed (control) for 28 days before they were intraperitoneally exposed to 4x105cfu CFU ml-1 S. agalactiae. The results revealed that the group fed medicated feed at 50 mg kg-1 was the most effective concentration and showed no significant difference (p >0.05) compared to control and antibiotic groups on blood parameters (red blood cell, globulin, total serum protein, mean cell hemoglobin, and mean cell hemoglobin concentration) with the highest survival rate 99.67% within experimental groups. Overall, our results indicated the potential of E. agallocha could prove to be a hematological profile enhancer which can help fish combat bacterial infections. It was concluded that increase in the white blood cell count observed in fish administered with E. agallocha leaf extract at 50 mg kg-1 suggests that E. agallocha extract contains agents that could stimulate the production of leucocytes and serve as an immune booster and prevent the risk of anemia.
{"title":"Efficacy of Excoecaria agallocha on hematological parameters in hybrid tilapia (Oreochromis niloticus) after experimental challenge with Streptococcus agalactiae","authors":"A. Laith, Ambak, A. Jabar, M. Najiah","doi":"10.22092/IJFS.2019.119140","DOIUrl":"https://doi.org/10.22092/IJFS.2019.119140","url":null,"abstract":"The potential of milky mangrove Excoecaria agallocha leaf extracts has been utilized in traditional medicine in various parts of the world. Blood is an important indicator of health and is a pathological mirror of the entire body. Therefore, the effects of E. agallocha leaf extract on hematology indices of hybrid tilapia (Oreochromis niloticus) were investigated. Experimental fish were randomly divided into seven groups. Groups 1 to 5 were fed medicated feed at five different concentrations (10, 20, 30, 40 and 50 mg kg-1) of E. agallocha leaf extract. Group 6 was given Flumequine (25 mg kg-1) and group 7 was fed with untreated feed (control) for 28 days before they were intraperitoneally exposed to 4x105cfu CFU ml-1 S. agalactiae. The results revealed that the group fed medicated feed at 50 mg kg-1 was the most effective concentration and showed no significant difference (p >0.05) compared to control and antibiotic groups on blood parameters (red blood cell, globulin, total serum protein, mean cell hemoglobin, and mean cell hemoglobin concentration) with the highest survival rate 99.67% within experimental groups. Overall, our results indicated the potential of E. agallocha could prove to be a hematological profile enhancer which can help fish combat bacterial infections. It was concluded that increase in the white blood cell count observed in fish administered with E. agallocha leaf extract at 50 mg kg-1 suggests that E. agallocha extract contains agents that could stimulate the production of leucocytes and serve as an immune booster and prevent the risk of anemia.","PeriodicalId":14569,"journal":{"name":"Iranian Journal of Fisheries Sciences","volume":"19 1","pages":"2512-2531"},"PeriodicalIF":0.9,"publicationDate":"2020-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46288512","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 : 2020-09-10DOI: 10.22092/IJFS.2020.122575
M. Zare, N. Bahador, M. Baserisalehi
Cyanobacteria (blue-green algae) are a unique group of photosynthetic bacteria amongst the oldest forms of life, which widespread in aquatic environments including freshwater lakes, rivers and reservoirs. Furthermore, they have ability to produce a wide range of secondary metabolites with toxic property for aquatic animals, as well as human beings. Considering the importance of cyanobacteria in public health, the introduction of sensitive and reliable methods for their detection is the main aim of this study. In the present study, 30 water samples were collected from six locations of the Kor River, Iran. The samples were analyzed for the prevalence of cyanobacterial species using conventional culture methods and morphological tests. Then, molecular identification of the isolates was performed by the comparative evaluation of three sets of primers (CYA106/CYA781; CYA781/CYA359; and PCα/PCβ). Furthermore, their abilities to produce cyanobacterial toxins including microcystin and nodularin synthetase enzyme complexes were investigated by using polymerase chain reaction method. The results obtained from this study indicated that two isolates were identified as Cyanobacterium aponinum and Phormidium sp. none of the isolates had ability to produce selected toxins. In addition, the results indicated that the selected pair primers were proper for detection of the isolates. Hence, due to importance of cyanobacterial isolation from water samples and their effect on human health, periodic studies in different water resources and regions seem necessary. Furthermore, among the selected primers, CYA106/CYA781 could be a proper primer pair for detection of cyanobacterial isolates.
{"title":"Phylogenetic analysis of isolated Phormidium sp. and Cyanobacterium aponinum from Kor River","authors":"M. Zare, N. Bahador, M. Baserisalehi","doi":"10.22092/IJFS.2020.122575","DOIUrl":"https://doi.org/10.22092/IJFS.2020.122575","url":null,"abstract":"Cyanobacteria (blue-green algae) are a unique group of photosynthetic bacteria amongst the oldest forms of life, which widespread in aquatic environments including freshwater lakes, rivers and reservoirs. Furthermore, they have ability to produce a wide range of secondary metabolites with toxic property for aquatic animals, as well as human beings. Considering the importance of cyanobacteria in public health, the introduction of sensitive and reliable methods for their detection is the main aim of this study. In the present study, 30 water samples were collected from six locations of the Kor River, Iran. The samples were analyzed for the prevalence of cyanobacterial species using conventional culture methods and morphological tests. Then, molecular identification of the isolates was performed by the comparative evaluation of three sets of primers (CYA106/CYA781; CYA781/CYA359; and PCα/PCβ). Furthermore, their abilities to produce cyanobacterial toxins including microcystin and nodularin synthetase enzyme complexes were investigated by using polymerase chain reaction method. The results obtained from this study indicated that two isolates were identified as Cyanobacterium aponinum and Phormidium sp. none of the isolates had ability to produce selected toxins. In addition, the results indicated that the selected pair primers were proper for detection of the isolates. Hence, due to importance of cyanobacterial isolation from water samples and their effect on human health, periodic studies in different water resources and regions seem necessary. Furthermore, among the selected primers, CYA106/CYA781 could be a proper primer pair for detection of cyanobacterial isolates.","PeriodicalId":14569,"journal":{"name":"Iranian Journal of Fisheries Sciences","volume":"19 1","pages":"2649-2659"},"PeriodicalIF":0.9,"publicationDate":"2020-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46649059","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 : 2020-09-10DOI: 10.22092/IJFS.2020.122566
A. Azari, S. Anvar, H. Ahari, A. Sharifan, A. M. Moghanjoghi
Utilizing present-day advancements is a well-considered methodology. In such manner, the combination of nanotechnology and food science has prompted the development of numerous capacities in the nutrition section. This study was conducted to evaluate the antimicrobial effect of nano-silver packaging at two refrigerator temperatures (4 and 8oC) in Tilapia to evaluate the total viable count of microorganisms, Escherichia coli, Staphylococcal aureus, and psychrophilic bacteria. Ten grams of washed fish were divided into 5 groups treated with A: 1%: B 3%, C: 5%, D: 7% nano silver coating (E was the control group) and stored for 0, 3, 7, 14 and 30 days. The biochemical analysis of total volatile nitrogen and peroxide composition was investigated, and the best nano silver percentage was 7%. The result of this study demonstrates that the antimicrobial properties of nano silver for various bacterial species are exclusive and we believe that nano-silver packaging improved the quality and shelf life of Nile Tilapia.
{"title":"Study on Nanosilver-TiO2 photocatalytic nanocomposite coating with extrusion technique for increasing shelf life of Nile Tilapia (Oreochromis niloticus)","authors":"A. Azari, S. Anvar, H. Ahari, A. Sharifan, A. M. Moghanjoghi","doi":"10.22092/IJFS.2020.122566","DOIUrl":"https://doi.org/10.22092/IJFS.2020.122566","url":null,"abstract":"Utilizing present-day advancements is a well-considered methodology. In such manner, the combination of nanotechnology and food science has prompted the development of numerous capacities in the nutrition section. This study was conducted to evaluate the antimicrobial effect of nano-silver packaging at two refrigerator temperatures (4 and 8oC) in Tilapia to evaluate the total viable count of microorganisms, Escherichia coli, Staphylococcal aureus, and psychrophilic bacteria. Ten grams of washed fish were divided into 5 groups treated with A: 1%: B 3%, C: 5%, D: 7% nano silver coating (E was the control group) and stored for 0, 3, 7, 14 and 30 days. The biochemical analysis of total volatile nitrogen and peroxide composition was investigated, and the best nano silver percentage was 7%. The result of this study demonstrates that the antimicrobial properties of nano silver for various bacterial species are exclusive and we believe that nano-silver packaging improved the quality and shelf life of Nile Tilapia.","PeriodicalId":14569,"journal":{"name":"Iranian Journal of Fisheries Sciences","volume":"19 1","pages":"2618-2633"},"PeriodicalIF":0.9,"publicationDate":"2020-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46977511","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 : 2020-09-10DOI: 10.22092/IJFS.2020.122274
Mina Ziarati, M. Zorriehzahra, F. Kafilzadeh, M. Kargar, Farangis Ghasemei
The Persian Gulf and its shores are important and strategic areas with a large variety of fish species. Betanodavirus infection is known to be a serious threat to susceptible fish and causing economic damages to the fisheries and fishing industry. Concerning to isolation and confirmation of VNN virus in the Mullet fish (Chelon aurata and C. saliens) in the Caspian Sea and its damages on Mullet stock, probably transmission of VNN could be hazardous in marine fish industry such as cage culture. So, the aim of this article was to characterize the distribution of the Betanodavirus in Iranian southern waters and its transmission. Finally, the issues of the transmission of Betanodavirus infection between the wild and farmed fish of different regions of the Persian Gulf is discussed. The probability of the emergence of viral epidemics and even new and virus-resistant hosts has been investigated whereby the monitoring and surveillance program for tracing the disease and the detection of the Betanodavirus presence is required before clinical signs occur in the near future. Meanwhile, screening of various species of susceptible fish and the identification of the viral carriers as a strategic approach is recommended. In fact, Eco- epidemiological studies are needed and all efforts should be focused on control and prevention of probably virus contamination in the Persian Gulf and Oman Sea waters as one of the strategic points in the world.
{"title":"An overview of Betanodavirus and perspective of Viral Nervous Necrosis (VNN) disease in Iranian southern waters","authors":"Mina Ziarati, M. Zorriehzahra, F. Kafilzadeh, M. Kargar, Farangis Ghasemei","doi":"10.22092/IJFS.2020.122274","DOIUrl":"https://doi.org/10.22092/IJFS.2020.122274","url":null,"abstract":"The Persian Gulf and its shores are important and strategic areas with a large variety of fish species. Betanodavirus infection is known to be a serious threat to susceptible fish and causing economic damages to the fisheries and fishing industry. Concerning to isolation and confirmation of VNN virus in the Mullet fish (Chelon aurata and C. saliens) in the Caspian Sea and its damages on Mullet stock, probably transmission of VNN could be hazardous in marine fish industry such as cage culture. So, the aim of this article was to characterize the distribution of the Betanodavirus in Iranian southern waters and its transmission. Finally, the issues of the transmission of Betanodavirus infection between the wild and farmed fish of different regions of the Persian Gulf is discussed. The probability of the emergence of viral epidemics and even new and virus-resistant hosts has been investigated whereby the monitoring and surveillance program for tracing the disease and the detection of the Betanodavirus presence is required before clinical signs occur in the near future. Meanwhile, screening of various species of susceptible fish and the identification of the viral carriers as a strategic approach is recommended. In fact, Eco- epidemiological studies are needed and all efforts should be focused on control and prevention of probably virus contamination in the Persian Gulf and Oman Sea waters as one of the strategic points in the world.","PeriodicalId":14569,"journal":{"name":"Iranian Journal of Fisheries Sciences","volume":"19 1","pages":"2214-2233"},"PeriodicalIF":0.9,"publicationDate":"2020-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47017885","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 : 2020-09-10DOI: 10.22092/IJFS.2020.122451
A. Rahdari, M. Khoshkholgh, M. Yarmohammadi, M. Ortiz-Zarragoitia, B. Falahatkar
Despite studies on the effect of androgens in female teleost fish, many aspects of androgen supplementation in female sturgeon gametogenesis remain elusive. The aim of the study was to investigate the immunological and physiological responses of 4-year-old previtellogenic great sturgeon (Huso huso) (body weight 5580±165 g) to 11-ketotestosterone (11-KT) implants. The fish were divided into two groups of 6 fish: 11-KT group, which received a single intraperitoneal implant of 2.5 mg 11-KT and a placebo group, which was implanted without 11-KT for 56 days. Just before implantation and on days 21 and 56 post-implantation, serum samples were taken to measure immune parameters (IgM, C3 and C4) and some related biochemical and hematological indices. Results showed a significant reduction in IgM concentrations after implantation in both the 11-KT and placebo groups (p 0.05). Serum testosterone (T) levels in the 11-KT implanted group increased significantly on days 21 and 56 post-implantation (p 0.05), but a significant difference was observed in the placebo group during the study period (p<0.05). In hematological parameters, the number of red blood cells significantly increased after 56 days compared with that after 21 days in both experimental groups (p<0.05), while white blood cells significantly increased in the 11-KT group after 56 days (p<0.05). The results indicated that implantation with or without 11-KT could suppress some immunity parameters of great sturgeon.
{"title":"Immune responses and hematological variables of cultured great sturgeon (Huso huso) subjected to 11-ketotestosterone implantation","authors":"A. Rahdari, M. Khoshkholgh, M. Yarmohammadi, M. Ortiz-Zarragoitia, B. Falahatkar","doi":"10.22092/IJFS.2020.122451","DOIUrl":"https://doi.org/10.22092/IJFS.2020.122451","url":null,"abstract":"Despite studies on the effect of androgens in female teleost fish, many aspects of androgen supplementation in female sturgeon gametogenesis remain elusive. The aim of the study was to investigate the immunological and physiological responses of 4-year-old previtellogenic great sturgeon (Huso huso) (body weight 5580±165 g) to 11-ketotestosterone (11-KT) implants. The fish were divided into two groups of 6 fish: 11-KT group, which received a single intraperitoneal implant of 2.5 mg 11-KT and a placebo group, which was implanted without 11-KT for 56 days. Just before implantation and on days 21 and 56 post-implantation, serum samples were taken to measure immune parameters (IgM, C3 and C4) and some related biochemical and hematological indices. Results showed a significant reduction in IgM concentrations after implantation in both the 11-KT and placebo groups (p 0.05). Serum testosterone (T) levels in the 11-KT implanted group increased significantly on days 21 and 56 post-implantation (p 0.05), but a significant difference was observed in the placebo group during the study period (p<0.05). In hematological parameters, the number of red blood cells significantly increased after 56 days compared with that after 21 days in both experimental groups (p<0.05), while white blood cells significantly increased in the 11-KT group after 56 days (p<0.05). The results indicated that implantation with or without 11-KT could suppress some immunity parameters of great sturgeon.","PeriodicalId":14569,"journal":{"name":"Iranian Journal of Fisheries Sciences","volume":"19 1","pages":"2437-2453"},"PeriodicalIF":0.9,"publicationDate":"2020-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44778547","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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