Pub Date : 2021-03-01DOI: 10.22092/IJFS.2021.351023.0
Gordon Amankwaa, Yi Lu, Tianshu Liu, Ningwei Wang, Yu Luan, Yunfei Cao, Weihong Huang, Xiaoni Ni, Eric Gyimah
Fish is a good source of protein; however, certain anthropogenic activities can contaminate their habitat with elevated heavy metals levels. In this study, copper, lead, mercury, cadmium, and arsenic in fish tissue, water and sediment were determined using PerkinElmer PINAAcle 900T Graphite AAS. Standard indices in human health risk assessment were used to estimate non-carcinogenic implications associated with consuming Clarias batrachus, Clarias gariepinus, Hemichromis fasciatus, Chrysichthys nigrodigitatus, and Macrobrachium rosenbergii from Densu River. Heavy metal concentration levels recorded in November 2017 were in the order of surface water 1), an indication of a non-cancer risk to consumers.
{"title":"Research Article: Heavy metals concentration profile of an aquatic environment and health implications of human exposure to fish and prawn species from an urban river (Densu)","authors":"Gordon Amankwaa, Yi Lu, Tianshu Liu, Ningwei Wang, Yu Luan, Yunfei Cao, Weihong Huang, Xiaoni Ni, Eric Gyimah","doi":"10.22092/IJFS.2021.351023.0","DOIUrl":"https://doi.org/10.22092/IJFS.2021.351023.0","url":null,"abstract":"Fish is a good source of protein; however, certain anthropogenic activities can contaminate their habitat with elevated heavy metals levels. In this study, copper, lead, mercury, cadmium, and arsenic in fish tissue, water and sediment were determined using PerkinElmer PINAAcle 900T Graphite AAS. Standard indices in human health risk assessment were used to estimate non-carcinogenic implications associated with consuming Clarias batrachus, Clarias gariepinus, Hemichromis fasciatus, Chrysichthys nigrodigitatus, and Macrobrachium rosenbergii from Densu River. Heavy metal concentration levels recorded in November 2017 were in the order of surface water 1), an indication of a non-cancer risk to consumers.","PeriodicalId":14569,"journal":{"name":"Iranian Journal of Fisheries Sciences","volume":"20 1","pages":"529-546"},"PeriodicalIF":0.9,"publicationDate":"2021-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41503410","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 : 2021-03-01DOI: 10.22092/IJFS.2021.123867
F. K. Khervi, M. Shojaei, S. Taghavimotlagh
Size-dependent variation in growth, mortality, and recruitment over time are potentially controlled by changes in length -frequency distribution that is dependent to capture probability. The changes in the length-frequency distribution of ribbonfish, Trichiurus lepturus were studied along northern coasts of the Persian Gulf during the period 2008-2017. The length-frequency distribution of ribbonfish indicated the exploitation of larger sizes over the past decade. The mean total length was significantly smaller than the mean length recorded a decade earlier in 2008 (p <0.05). The length-weight relationship (WT=0.00004LT3.44) was found to be significant at 1% level of significance and indicated positive allometric growth. The Von Bertalanffy growth parameters of all fish were =119.35 cm, K=0.3 year-1, and t0 = -0.38 year. Total, natural, and fishing mortality were estimated as 1.16 year-1, 0.53 year-1, and 0.63 year-1. The annual instantaneous rate of fishing mortality was higher than the target (Fopt= 0.26 year−1) and limit (Flim=0.35 year−1) reference points, indicating that the ribbonfish stock is at the risk of unsustainable exploitation.
{"title":"Research Article: The decline in the size of ribbonfish, Trichiurus lepturus (Linnaeus 1758), over the past decade in the Persian Gulf","authors":"F. K. Khervi, M. Shojaei, S. Taghavimotlagh","doi":"10.22092/IJFS.2021.123867","DOIUrl":"https://doi.org/10.22092/IJFS.2021.123867","url":null,"abstract":"Size-dependent variation in growth, mortality, and recruitment over time are potentially controlled by changes in length -frequency distribution that is dependent to capture probability. The changes in the length-frequency distribution of ribbonfish, Trichiurus lepturus were studied along northern coasts of the Persian Gulf during the period 2008-2017. The length-frequency distribution of ribbonfish indicated the exploitation of larger sizes over the past decade. The mean total length was significantly smaller than the mean length recorded a decade earlier in 2008 (p <0.05). The length-weight relationship (WT=0.00004LT3.44) was found to be significant at 1% level of significance and indicated positive allometric growth. The Von Bertalanffy growth parameters of all fish were =119.35 cm, K=0.3 year-1, and t0 = -0.38 year. Total, natural, and fishing mortality were estimated as 1.16 year-1, 0.53 year-1, and 0.63 year-1. The annual instantaneous rate of fishing mortality was higher than the target (Fopt= 0.26 year−1) and limit (Flim=0.35 year−1) reference points, indicating that the ribbonfish stock is at the risk of unsustainable exploitation.","PeriodicalId":14569,"journal":{"name":"Iranian Journal of Fisheries Sciences","volume":"20 1","pages":"463-474"},"PeriodicalIF":0.9,"publicationDate":"2021-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44167820","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 : 2021-03-01DOI: 10.22092/IJFS.2021.123783
M. Babazadeh, M. Soltani, A. Kamali, M. R. Saediasl
The production of single cell protein (SCP) is one of the cheap protein sources for use in aquaculture. In this study, Claveromycice frajilice and Fusarium oxysporum were used to produce SCP using Kilka stick water as the source of medium. Adaptation of C. frajilice and F. oxysporum to pure stick water was performed by increasing the concentration of stick water in distilled water. Treatments included 50% and 100% stick water, and a group without stick water as control. The pattern of the yeast and fungus growth was studied by spectrophotometry at 600 nm. The final product was analyzed for values of dry materials, amino acids profiles, total protein, moisture and ash. The results showed protein production by C. frajilice in 50% and 100% stick water was 55.35% and 57.47%, respectively, compared to 54.65% in control group (P>0.05). Protein production using F. oxysporum was 53.17% and 54.39±0.45%in 50% and 100% stick water, respectively compared to 49.71% in control group (P>0.05). The results showed that amino acids composition in produced SCP was comparable with the suggested profiles of requirement by FAO/WHO and NRC. Based on to the obtained results, application of pure Kilka stick water is suitable for production of C. frajilice as the source of SCP.
{"title":"Research Article: Single cell production by Claveromycice frajilice and Fusarium oxysporum in Kilka stick water","authors":"M. Babazadeh, M. Soltani, A. Kamali, M. R. Saediasl","doi":"10.22092/IJFS.2021.123783","DOIUrl":"https://doi.org/10.22092/IJFS.2021.123783","url":null,"abstract":"The production of single cell protein (SCP) is one of the cheap protein sources for use in aquaculture. In this study, Claveromycice frajilice and Fusarium oxysporum were used to produce SCP using Kilka stick water as the source of medium. Adaptation of C. frajilice and F. oxysporum to pure stick water was performed by increasing the concentration of stick water in distilled water. Treatments included 50% and 100% stick water, and a group without stick water as control. The pattern of the yeast and fungus growth was studied by spectrophotometry at 600 nm. The final product was analyzed for values of dry materials, amino acids profiles, total protein, moisture and ash. The results showed protein production by C. frajilice in 50% and 100% stick water was 55.35% and 57.47%, respectively, compared to 54.65% in control group (P>0.05). Protein production using F. oxysporum was 53.17% and 54.39±0.45%in 50% and 100% stick water, respectively compared to 49.71% in control group (P>0.05). The results showed that amino acids composition in produced SCP was comparable with the suggested profiles of requirement by FAO/WHO and NRC. Based on to the obtained results, application of pure Kilka stick water is suitable for production of C. frajilice as the source of SCP.","PeriodicalId":14569,"journal":{"name":"Iranian Journal of Fisheries Sciences","volume":"20 1","pages":"324-332"},"PeriodicalIF":0.9,"publicationDate":"2021-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47747134","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 : 2021-03-01DOI: 10.22092/IJFS.2021.123874
Sanaz Kosari, R. M. Nadushan, Reza Faremi, Keyvan Ejlali Khanghah, A. Mashinchian
The present study was conducted with the aim of identification of macrobenthos in the Yekshabe estuary in Persian Gulf. Sampling of macrobenthos was performed from spring 2015 for one year. It was carried out seasonally by the Van Veen Grab (0.04 m2) at four stations, with three replications. The identified macrobenthos belonged to 51 families, 70 genera, 80 species, 4 classes (including Polychaeta, Malacostraca, Bivalvia, Gastropoda) and 5 Phyla. The average total density of macrobenthos was 760±614 per square meter. The most frequently observed classes of macrobenthos belonged to Polychaeta (67.8%), Malacostraca (18.5%), Bivalvia (11.6%) and Gastropoda (1.2%), respectively. According to the results of the Kruskal–Wallis test, there was no significant difference between the macrobenthos classes among the different sampling stations. The highest values of the Shannon-Wiener index of diversity (3.07) and the Margalef's richness index (4.66) were observed in spring, whereas the highest value of the Pielou's evenness index (0.95) was observed in autumn. The values of all indices at station 4 were the highest as compared to those of the others. The results of ANOVA test showed that the mean values of the indices were significantly different (p <0.05) in different seasons, whereas the mean values were not significantly different at stations
{"title":"Macrobenthos as bioindicator of ecological status in the Yekshabe creek-estuary, Persian Gulf","authors":"Sanaz Kosari, R. M. Nadushan, Reza Faremi, Keyvan Ejlali Khanghah, A. Mashinchian","doi":"10.22092/IJFS.2021.123874","DOIUrl":"https://doi.org/10.22092/IJFS.2021.123874","url":null,"abstract":"The present study was conducted with the aim of identification of macrobenthos in the Yekshabe estuary in Persian Gulf. Sampling of macrobenthos was performed from spring 2015 for one year. It was carried out seasonally by the Van Veen Grab (0.04 m2) at four stations, with three replications. The identified macrobenthos belonged to 51 families, 70 genera, 80 species, 4 classes (including Polychaeta, Malacostraca, Bivalvia, Gastropoda) and 5 Phyla. The average total density of macrobenthos was 760±614 per square meter. The most frequently observed classes of macrobenthos belonged to Polychaeta (67.8%), Malacostraca (18.5%), Bivalvia (11.6%) and Gastropoda (1.2%), respectively. According to the results of the Kruskal–Wallis test, there was no significant difference between the macrobenthos classes among the different sampling stations. The highest values of the Shannon-Wiener index of diversity (3.07) and the Margalef's richness index (4.66) were observed in spring, whereas the highest value of the Pielou's evenness index (0.95) was observed in autumn. The values of all indices at station 4 were the highest as compared to those of the others. The results of ANOVA test showed that the mean values of the indices were significantly different (p <0.05) in different seasons, whereas the mean values were not significantly different at stations","PeriodicalId":14569,"journal":{"name":"Iranian Journal of Fisheries Sciences","volume":"20 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2021-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45666684","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 : 2021-03-01DOI: 10.22092/IJFS.2021.123786
M. Jaski, K. R. Ghadikolaei, M. Yahyavei, A. Salarzadeh
The blue-green algae Spirulina platensis was cultured with different nitrogen regimes (NH4Cl, NH4NO3 and KNO3) with concentrations of 0.010, 0.025 and 0.050 M and then fed to Litopenaeus vannamei at 19 days post hatch (PLI) to evaluate the nutritional quality. At the end of the experiment, growth and survival rate were determined, and the larval development was calculated. The maximum protein content was obtained in culture media containing NH4NO3 followed by NH4Cl and KNO3 (p >0.05). Moreover, in all S. platensis cultures, increases in nitrogen concentrations led to increases in protein content. The present study showed that, with the exception of shrimp larvae at 5 days post hatch, L. vannamei shrimp larvae fed on S. platensis cultured in NH4NO3, as a nitrogen regime, generally developed significantly (p 0.05) when the nitrogen was varied in terms of regimes. Overall, the study points to the potential effectiveness of using NH4NO3 as a nitrogen regime in S. platensis culture media in producing live food for the hatchery production of L. vannamei shrimp larvae.
{"title":"Research Article: Effeciency of Spirulina platensis cultured with different nitrogen regimes on larval development, growth and survival rate of white shrimp, Litopenaeus vannamei n.R.1","authors":"M. Jaski, K. R. Ghadikolaei, M. Yahyavei, A. Salarzadeh","doi":"10.22092/IJFS.2021.123786","DOIUrl":"https://doi.org/10.22092/IJFS.2021.123786","url":null,"abstract":"The blue-green algae Spirulina platensis was cultured with different nitrogen regimes (NH4Cl, NH4NO3 and KNO3) with concentrations of 0.010, 0.025 and 0.050 M and then fed to Litopenaeus vannamei at 19 days post hatch (PLI) to evaluate the nutritional quality. At the end of the experiment, growth and survival rate were determined, and the larval development was calculated. The maximum protein content was obtained in culture media containing NH4NO3 followed by NH4Cl and KNO3 (p >0.05). Moreover, in all S. platensis cultures, increases in nitrogen concentrations led to increases in protein content. The present study showed that, with the exception of shrimp larvae at 5 days post hatch, L. vannamei shrimp larvae fed on S. platensis cultured in NH4NO3, as a nitrogen regime, generally developed significantly (p 0.05) when the nitrogen was varied in terms of regimes. Overall, the study points to the potential effectiveness of using NH4NO3 as a nitrogen regime in S. platensis culture media in producing live food for the hatchery production of L. vannamei shrimp larvae.","PeriodicalId":14569,"journal":{"name":"Iranian Journal of Fisheries Sciences","volume":"20 1","pages":"358-369"},"PeriodicalIF":0.9,"publicationDate":"2021-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46147058","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 : 2021-03-01DOI: 10.22092/IJFS.2021.350848.0
Elnaz Elnaz Keshtkar Langerudi, S. Jamili, E. Ramezani-Fard, Z. Khoshnood
The present study was conducted to determine the appropriate weight to release the hatchery produced fingerling of stellate sturgeon, Acipenser stellatus, into its natural habitat. For this purpose, prolactin and cortisol hormones, plasma electrolytes and osmolality as well as histological changes in the gill and kidney of stellate sturgeon transferred from fresh to brackish water at different weight (0.5, 1, 2, and 3 g) were assessed during a one-week time course. A total of 2400 fingerlings with different weights (0.5, 1, 2, and 3 g) were equally assigned into 24 aquariums, each one containing 200 L of freshwater or brackish water. After 24 hours, prolactin showed the highest concentration in 0.5 and 3 g fish groups kept in both experimental waters. Cortisol exhibited a time-dependent increase in the 0.5 g group in both experimental waters as well as the 2 g larvae kept in the brackish water. Generally, lower levels of Mg2+, Ca+2; K+, Na+, and Cl- were measured in the fish kept in freshwater aquariums. The lowest levels of osmolarity were found in the 0.5 g fingerling, especially those kept in the freshwater aquariums, whereas the highest levels were observed in 3 g groups in both experimental waters. Histological assessments illustrated that the volume of chloride cells in freshwater increased with increasing fish weight, whereas the cell count decreased. The same held true for glomerular capillary network size. Taken together, the evidence from this study suggests that stellate sturgeon fingerling less than 2 g are almost incapable to be transferred to brackish and saline environment, due to lack of kidney and gill development.
{"title":"Optimum weight of stellate sturgeon (Acipenser stellatus) fingerling to release into brackish water: plasma electrolytes, plasma hormones and histological observation","authors":"Elnaz Elnaz Keshtkar Langerudi, S. Jamili, E. Ramezani-Fard, Z. Khoshnood","doi":"10.22092/IJFS.2021.350848.0","DOIUrl":"https://doi.org/10.22092/IJFS.2021.350848.0","url":null,"abstract":"The present study was conducted to determine the appropriate weight to release the hatchery produced fingerling of stellate sturgeon, Acipenser stellatus, into its natural habitat. For this purpose, prolactin and cortisol hormones, plasma electrolytes and osmolality as well as histological changes in the gill and kidney of stellate sturgeon transferred from fresh to brackish water at different weight (0.5, 1, 2, and 3 g) were assessed during a one-week time course. A total of 2400 fingerlings with different weights (0.5, 1, 2, and 3 g) were equally assigned into 24 aquariums, each one containing 200 L of freshwater or brackish water. After 24 hours, prolactin showed the highest concentration in 0.5 and 3 g fish groups kept in both experimental waters. Cortisol exhibited a time-dependent increase in the 0.5 g group in both experimental waters as well as the 2 g larvae kept in the brackish water. Generally, lower levels of Mg2+, Ca+2; K+, Na+, and Cl- were measured in the fish kept in freshwater aquariums. The lowest levels of osmolarity were found in the 0.5 g fingerling, especially those kept in the freshwater aquariums, whereas the highest levels were observed in 3 g groups in both experimental waters. Histological assessments illustrated that the volume of chloride cells in freshwater increased with increasing fish weight, whereas the cell count decreased. The same held true for glomerular capillary network size. Taken together, the evidence from this study suggests that stellate sturgeon fingerling less than 2 g are almost incapable to be transferred to brackish and saline environment, due to lack of kidney and gill development.","PeriodicalId":14569,"journal":{"name":"Iranian Journal of Fisheries Sciences","volume":"20 1","pages":"449-462"},"PeriodicalIF":0.9,"publicationDate":"2021-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47479540","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 : 2021-03-01DOI: 10.22092/IJFS.2021.351071.0
N. Mirhosseini, E. Cano-Europa, R. Davarnejad, A. Hallajisani, M. Franco-Colín, O. Tavakoli, Vanessa Blas-Valdivia
Arthrospira (Spirulina)has been considered as an attractive microalgae in all aspects of human life including medicine, cosmetics, and food. Nitrogen source is an important cost-saving factor in large-scale cultivation. In the present study, the cultivation of S. maxima was studied by replacing the basic-nitrogen source of Zarrouk’s medium (2.5 gL-1) with concentration ranges of 0-10 gL-1 for sodium nitrate and 0-5 gL-1 for ammonium sulfate in terms of biomass and phycobiliproteins production. Biomass and phycobiliprotein growth of different nitrogen sources have shown different effects on growth. The changes in the amount of cell dry weight as a function of sodium nitrate did not show significant changes relating to its concentration. In case of ammonium sulfate, the cell dry weight of S. maxima without nitrogen source was 0.835 gL-1 during five days of cultivation. Moreover, phycocyanin and allophycocyanin contents were 0.053 and 0.072 mgL-1, respectively, while phycobiliproteins content and cell dry weight were decreased by increasing further concentration.There was a significant difference among the culture mediums containing ammonium sulfate and without nitrogen source in terms of concentration of biomass and phycobiliprotein. The highest and lowest results for cell dry weight and phycobiliprotein production were obtained from the treatment with nitrogen starvation and 5 gL-1 ammonium sulfate, respectively. Finally, nitrogen starvation was proved as a feasible way to grow and could be good candidate for biomass growth and phycobiliprotein.
{"title":"Research Article: Cultivations of Arthrospira maxima (Spirulina) using ammonium sulfate and sodium nitrate as an alternative nitrogen sources","authors":"N. Mirhosseini, E. Cano-Europa, R. Davarnejad, A. Hallajisani, M. Franco-Colín, O. Tavakoli, Vanessa Blas-Valdivia","doi":"10.22092/IJFS.2021.351071.0","DOIUrl":"https://doi.org/10.22092/IJFS.2021.351071.0","url":null,"abstract":"Arthrospira (Spirulina)has been considered as an attractive microalgae in all aspects of human life including medicine, cosmetics, and food. Nitrogen source is an important cost-saving factor in large-scale cultivation. In the present study, the cultivation of S. maxima was studied by replacing the basic-nitrogen source of Zarrouk’s medium (2.5 gL-1) with concentration ranges of 0-10 gL-1 for sodium nitrate and 0-5 gL-1 for ammonium sulfate in terms of biomass and phycobiliproteins production. Biomass and phycobiliprotein growth of different nitrogen sources have shown different effects on growth. The changes in the amount of cell dry weight as a function of sodium nitrate did not show significant changes relating to its concentration. In case of ammonium sulfate, the cell dry weight of S. maxima without nitrogen source was 0.835 gL-1 during five days of cultivation. Moreover, phycocyanin and allophycocyanin contents were 0.053 and 0.072 mgL-1, respectively, while phycobiliproteins content and cell dry weight were decreased by increasing further concentration.There was a significant difference among the culture mediums containing ammonium sulfate and without nitrogen source in terms of concentration of biomass and phycobiliprotein. The highest and lowest results for cell dry weight and phycobiliprotein production were obtained from the treatment with nitrogen starvation and 5 gL-1 ammonium sulfate, respectively. Finally, nitrogen starvation was proved as a feasible way to grow and could be good candidate for biomass growth and phycobiliprotein.","PeriodicalId":14569,"journal":{"name":"Iranian Journal of Fisheries Sciences","volume":"20 1","pages":"475-489"},"PeriodicalIF":0.9,"publicationDate":"2021-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46890231","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 : 2021-03-01DOI: 10.22092/IJFS.2021.350796.0
A. Maghsoudlou, Niloofar Azimi, P. G. Mostafavi, B. Moghaddasi, A. Moradi
Benthic foraminifera are important in sediment production of coral reef environments and are excellent indicators of water quality and reef health. There is a lack of precise information about the foraminifer’s fauna of the coral reefs in the Persian Gulf. In this study, sediment sampling was performed in June 2019 from two coral stations of Naz Island and Zeytoon Park. The surface sediment with three replicates for each location was collected using a mini corer and then were fixed in 70% ethanol. In this study, thirty species belong to 23 genera and 19 families of foraminifer's assemblages were identified based on morphological characters. Our results indicated that Foraminiferal assemblages were similar in both sampling localities. Quinqueloculina was the most abundant genera for both Naz Island and Zeytoon Park. Foraminifer's frequency of Zeytoon Park was higher than Naz Island. Symbiont-bearing foraminifera (e.g. Peneroplis) were observed just in Zeytoon Park. Higher frequency and the presence of symbiont-bearing foraminifera possibly indicate that Zeytoon Park has a more favorable condition for the coral reef growth in the future. Finally, we recommend that the structure of the foraminifer’s community could be used as an early warning system for water quality around coral reefs and in particular, would help resource managers make better decisions about protecting coral habitats.
{"title":"Study of coral reef benthic foraminiferal assemblages in Qeshm Island, Persian Gulf","authors":"A. Maghsoudlou, Niloofar Azimi, P. G. Mostafavi, B. Moghaddasi, A. Moradi","doi":"10.22092/IJFS.2021.350796.0","DOIUrl":"https://doi.org/10.22092/IJFS.2021.350796.0","url":null,"abstract":"Benthic foraminifera are important in sediment production of coral reef environments and are excellent indicators of water quality and reef health. There is a lack of precise information about the foraminifer’s fauna of the coral reefs in the Persian Gulf. In this study, sediment sampling was performed in June 2019 from two coral stations of Naz Island and Zeytoon Park. The surface sediment with three replicates for each location was collected using a mini corer and then were fixed in 70% ethanol. In this study, thirty species belong to 23 genera and 19 families of foraminifer's assemblages were identified based on morphological characters. Our results indicated that Foraminiferal assemblages were similar in both sampling localities. Quinqueloculina was the most abundant genera for both Naz Island and Zeytoon Park. Foraminifer's frequency of Zeytoon Park was higher than Naz Island. Symbiont-bearing foraminifera (e.g. Peneroplis) were observed just in Zeytoon Park. Higher frequency and the presence of symbiont-bearing foraminifera possibly indicate that Zeytoon Park has a more favorable condition for the coral reef growth in the future. Finally, we recommend that the structure of the foraminifer’s community could be used as an early warning system for water quality around coral reefs and in particular, would help resource managers make better decisions about protecting coral habitats.","PeriodicalId":14569,"journal":{"name":"Iranian Journal of Fisheries Sciences","volume":"20 1","pages":"558-571"},"PeriodicalIF":0.9,"publicationDate":"2021-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43599200","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 : 2021-03-01DOI: 10.22092/IJFS.2021.123905
A. Zaheri, N. Bahador, M. Yousefzadi, M. Arman
The increasing incidence of the harmful cyanobacterial blooms in mangrove ecosystem is a potential threat for aquatic organisms and their consumers. In the present study, we have evaluated the biodiversity of cyanobacteria and monitored their cyanotoxins. We isolated 120 bacterial isolates using BG11 medium from water and sediment samples collected from 10 stations throughout of the Khoor-e-Khooran mangrove forest at august 2018. Biodiversity and distribution pattern based on morphological characteristics showed that 10 cyanobacterial genera were spread over the studied area. Phormidium, Oscillatoria, Spirulina and Nostoc genera were dominated with frequency percentages of 25%, 20%, 10%, and 10% respectively. Analysis of 16S rRNA sequences showed that the strains have high similarity with type strains in NCBI GenBank ranged from 98% to 100%. Phylogenetic analysis proposed the non-indigenous origin of Microcystis strains because of their phylogenetic divergence. We detected microcystin gene in Microcystis sp. strain KH 3, Microcystis sp. strain KH 4 and Microcystis sp. strain KH 11, while nodularin and cylindrospermopsin gene were not detected in all isolated cyanobacteria. The extracted metabolites from KH 3 and KH 4 strains showed cytotoxicity with LC50 of 139.3 and 225.8 µg/mL against Artemia salina respectively. Their LC50 were 231.3 and 211.2 µg/mL against shrimp larvae respectively. They inhibited the proliferation of HUVEC cell lines with IC50 of 11.13 and 13.29 µg/mL and HEPG2 with IC50 of 15.49 and 12.51 µg/mL, respectively. Our results represented diversity and distribution pattern of cyanobacteria and demonstrated the incidence of microcystin in the Khoor-e-Khooran mangrove forest.
{"title":"Research Article: Molecular identification and toxicity effects of cyanobacteria species isolated from the Khoor-e-Khooran mangrove forest, Persian Gulf","authors":"A. Zaheri, N. Bahador, M. Yousefzadi, M. Arman","doi":"10.22092/IJFS.2021.123905","DOIUrl":"https://doi.org/10.22092/IJFS.2021.123905","url":null,"abstract":"The increasing incidence of the harmful cyanobacterial blooms in mangrove ecosystem is a potential threat for aquatic organisms and their consumers. In the present study, we have evaluated the biodiversity of cyanobacteria and monitored their cyanotoxins. We isolated 120 bacterial isolates using BG11 medium from water and sediment samples collected from 10 stations throughout of the Khoor-e-Khooran mangrove forest at august 2018. Biodiversity and distribution pattern based on morphological characteristics showed that 10 cyanobacterial genera were spread over the studied area. Phormidium, Oscillatoria, Spirulina and Nostoc genera were dominated with frequency percentages of 25%, 20%, 10%, and 10% respectively. Analysis of 16S rRNA sequences showed that the strains have high similarity with type strains in NCBI GenBank ranged from 98% to 100%. Phylogenetic analysis proposed the non-indigenous origin of Microcystis strains because of their phylogenetic divergence. We detected microcystin gene in Microcystis sp. strain KH 3, Microcystis sp. strain KH 4 and Microcystis sp. strain KH 11, while nodularin and cylindrospermopsin gene were not detected in all isolated cyanobacteria. The extracted metabolites from KH 3 and KH 4 strains showed cytotoxicity with LC50 of 139.3 and 225.8 µg/mL against Artemia salina respectively. Their LC50 were 231.3 and 211.2 µg/mL against shrimp larvae respectively. They inhibited the proliferation of HUVEC cell lines with IC50 of 11.13 and 13.29 µg/mL and HEPG2 with IC50 of 15.49 and 12.51 µg/mL, respectively. Our results represented diversity and distribution pattern of cyanobacteria and demonstrated the incidence of microcystin in the Khoor-e-Khooran mangrove forest.","PeriodicalId":14569,"journal":{"name":"Iranian Journal of Fisheries Sciences","volume":"20 1","pages":"572-589"},"PeriodicalIF":0.9,"publicationDate":"2021-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46002388","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 : 2021-03-01DOI: 10.22092/IJFS.2021.350934.0
Seyyedamin Taghavimotlagh, R. Daryanabard, Jennifer M Gee
Socio-economic data of Kilka fisheries in the south part of the Caspian Sea were collected using questionnaire form which consists of different variables related to the fishing activity to evaluate its socio-economic performance. The data collected were employed and assessed, social and economic indicators, cost structure, livelihoods, employment and profitability, level of investments, debts, subsidies, activity levels, demographics and ownership structures. The result of the analysis shows that in Mazandaran province 80% of the vessels owners were active in vessels fishing operation. This figure was 90% for the segment 12-18 LOA and 40% for the segment 18-24 LOA of Gilan province. The survey also showed lower revenue and higher costs for the vessels that owner present on the board of vessel during fishing operation. According to the analysis a total of 377.4 crew were engaged on the board of all the vessel segments in both provinces. Mean number of crew engaged on the board of each fishing vessel was 5.1. The numbers of different individuals engaged on Kilka fisheries in both provinces were calculated to be 480. The average working hours per crew for the Kilka fleets in the southern Caspian Sea calculated to be 1212.1 hours per year. This index for different vessel segments, 12-18 LOA Mazandaran, 12-18 Gilan and 18-24 LOA, were 1230.8, 1182.7 and 1221.0 per individual respectively. Comparing this index for the same vessel segments in Mazandaran and Gilan, showed 48 hours higher for Mazandarn fleet segment. The activity level (days at sea) for Mazandaran fleet was estimated to be 5485.8 days, which higher than Gilan fleets. In general, 63% of the effort (days at sea) was belonged to Mazandaran fleet. Daily duration of fishing trip for whole Kilka fisheries was calculated as 16.5 hours per day. Total yearly duration of fishing trip for whole fleets for the year under study (2017) was 144108 hours, from which 90351 hours were belonged to Mazandaran fleet (12-18 LOA) with higher fishing trip (63%). According to results more than 50% of the operational costs of Kilka fisheries were belonged to crew share (salary) and the lowest portion of the operational costs were belonged to energy costs. The results show that total of 2.6 Million liters of fuel and oil were consumed by whole Kilka fleet in the Caspian Sea in 2017, which 75% of this amount was belong to Mazandaran fleet segments. Each $US in 2017= 3885 Tomans (Iranian Currency).
使用调查表收集了里海南部基尔卡渔业的社会经济数据，调查表由与渔业活动相关的不同变量组成，以评估其社会经济表现。收集的数据包括就业和评估、社会和经济指标、成本结构、生计、就业和盈利能力、投资水平、债务、补贴、活动水平、人口统计和所有权结构。分析结果表明，在马赞德兰省，80%的船主积极参与船只捕捞活动。吉兰省12-18段LOA的这一数字为90%，18-24段LOA为40%。调查还显示，船主在捕鱼作业期间出现在船上的船只收入较低，成本较高。根据分析，这两个省的所有航段共有377.4名船员。每艘渔船的平均船员人数为5.1人。据计算，这两个省从事基尔卡渔业的不同个体数量为480人。据计算，基尔卡船队在里海南部的每个船员的平均工作时间为每年1212.1小时。不同血管段（12-18 LOA Mazandaran、12-18 Gilan和18-24 LOA）的这一指数分别为1230.8、1182.7和1221.0。比较马赞德兰和吉兰的相同船只段的这一指数，发现马赞德兰船队段高出48小时。马赞德兰舰队的活动水平（海上天数）估计为5485.8天，高于吉兰舰队。总的来说，63%的工作量（海上天数）属于马赞德兰舰队。整个基尔卡渔场的每日捕鱼时间计算为每天16.5小时。研究年度（2017年），整个船队的年总捕鱼时间为144108小时，其中90351小时属于马赞德兰船队（12-18 LOA），捕鱼时间较高（63%）。根据结果，基尔卡渔业50%以上的运营成本属于船员份额（工资），运营成本的最低部分属于能源成本。结果显示，2017年，整个基尔卡船队在里海共消耗了260万升燃料和石油，其中75%属于马赞德兰船队。2017年每美元=3885托马斯（伊朗货币）。
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