Although aggregation of macroparasites characterized by unequal distribution of parasites on the host is a known axiom in marine fishes, aggregation of nematode, Hysterothylacium aduncum was not previously studied in whiting, Merlangius merlangus. Here, we investigated the host-related (fish condition factor) and parasite-related factors (parasite load) as well as the distribution pattern of H. aduncum in whiting to determine whether aggregation existed or not. The distribution of H. aduncum (third larval stage) in whiting has been shown to be aggregated. Aggregation of H. aduncum was assessed by Weibull distribution. The aggregation degree of nematode, H. aduncum in whiting was changed by the individual fish. The observed pattern of parasite distribution by the individual fish enabled the recognition of aggregation for the first time in whiting. The prediction of the intensity of H. aduncum in whiting improved the understanding of the host-parasite system, particularly for the dynamics of the parasite.
{"title":"Aggregation of Nematode, Hysterothylacium aduncum in whiting, Merlangius merlangus","authors":"H. Yavuzcan, M. Demir, F. Seçer","doi":"10.3153/ar22026","DOIUrl":"https://doi.org/10.3153/ar22026","url":null,"abstract":"Although aggregation of macroparasites characterized by unequal distribution of parasites on the host is a known axiom in marine fishes, aggregation of nematode, Hysterothylacium aduncum was not previously studied in whiting, Merlangius merlangus. Here, we investigated the host-related (fish condition factor) and parasite-related factors (parasite load) as well as the distribution pattern of H. aduncum in whiting to determine whether aggregation existed or not. The distribution of H. aduncum (third larval stage) in whiting has been shown to be aggregated. Aggregation of H. aduncum was assessed by Weibull distribution. The aggregation degree of nematode, H. aduncum in whiting was changed by the individual fish. The observed pattern of parasite distribution by the individual fish enabled the recognition of aggregation for the first time in whiting. The prediction of the intensity of H. aduncum in whiting improved the understanding of the host-parasite system, particularly for the dynamics of the parasite.","PeriodicalId":13619,"journal":{"name":"International Aquatic Research","volume":"58 1","pages":""},"PeriodicalIF":1.3,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83390827","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
On 25 March 2022, two specimens of Bregmaceros nectabanus were captured by a commercial purse-seiner for targeting sardine and anchovy off Kırdeniz, Izmir Bay at a depth of 30 m. The total length of these specimens was between 53 and 63 mm. Thus, the record number has reached at least 37 specimens in the eastern Mediterranean Sea. This paper presents the third confirmed record of B. nectabanus from Izmir Bay (Northeastern Aegean Sea). Though the sporadic occurrences of this species in Izmir Bay do not indicate an established population for the time being, it signs that it's getting abundant.
{"title":"The recent capture of Bregmaceros nectabanus (Bregmacerotidae) from purse-seine fishery in Izmir Bay, NE Aegean Sea","authors":"O. Akyol","doi":"10.3153/ar22031","DOIUrl":"https://doi.org/10.3153/ar22031","url":null,"abstract":"On 25 March 2022, two specimens of Bregmaceros nectabanus were captured by a commercial purse-seiner for targeting sardine and anchovy off Kırdeniz, Izmir Bay at a depth of 30 m. The total length of these specimens was between 53 and 63 mm. Thus, the record number has reached at least 37 specimens in the eastern Mediterranean Sea. This paper presents the third confirmed record of B. nectabanus from Izmir Bay (Northeastern Aegean Sea). Though the sporadic occurrences of this species in Izmir Bay do not indicate an established population for the time being, it signs that it's getting abundant.","PeriodicalId":13619,"journal":{"name":"International Aquatic Research","volume":"40 1","pages":""},"PeriodicalIF":1.3,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77351481","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A. Kerfouf, P. R. De los Ríos-Escalante, Kamel Belhadj Tahar, F. Denis
A total of 46 samples were taken in the softbottom of the Gulf of Oran, in order to study the nature of the sediments and the spatial distribution of the mollusc communities. As a result of sampling in the study area, at depth range (30 m -106 m), a total of 29 species were identified, included in two classes: Gastropoda and Bivalvia. The use of multi-variate statistical analyzes, as well as particle size analysis, made it possible to identify the main mollusc communities. Six mollusc communities were defined from faunistic and sedimentologic affinities. The malacological fauna of the Gulf of Oran is dominated by Saccella commutata (33.33%), Limatula subauriculata (20.83%) and Nucula sulcata (20.83%). The main ecological stocks are mixicole and coastal detritus species. The malacofauna of the Gulf of Oran is scarce and less diversified due to the nature of the soft bottoms (sand and gravel) and the absence of terrigenous inputs.
{"title":"Distribution of soft-bottom benthic molluscs in the Gulf of Oran (Western Algeria)","authors":"A. Kerfouf, P. R. De los Ríos-Escalante, Kamel Belhadj Tahar, F. Denis","doi":"10.3153/ar22020","DOIUrl":"https://doi.org/10.3153/ar22020","url":null,"abstract":"A total of 46 samples were taken in the softbottom of the Gulf of Oran, in order to study the nature of the sediments and the spatial distribution of the mollusc communities. As a result of sampling in the study area, at depth range (30 m -106 m), a total of 29 species were identified, included in two classes: Gastropoda and Bivalvia. The use of multi-variate statistical analyzes, as well as particle size analysis, made it possible to identify the main mollusc communities. Six mollusc communities were defined from faunistic and sedimentologic affinities. The malacological fauna of the Gulf of Oran is dominated by Saccella commutata (33.33%), Limatula subauriculata (20.83%) and Nucula sulcata (20.83%). The main ecological stocks are mixicole and coastal detritus species. The malacofauna of the Gulf of Oran is scarce and less diversified due to the nature of the soft bottoms (sand and gravel) and the absence of terrigenous inputs.","PeriodicalId":13619,"journal":{"name":"International Aquatic Research","volume":"55 1","pages":""},"PeriodicalIF":1.3,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85243527","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
This study, it was aimed to examine the clinical, hematological, and histopathological aspects of lactococcosis induced in European sea bass (Dicentrarchus labrax), which was experimentally infected with Lactococcus garvieae. For this purpose, the infection was induced intraperitoneally with L. garvieae strain (108 CFU/mL), and blood samples were collected from the infected fish on different days (6, 18, 26, 31, 36, 44, and 48th) of infection. The morphological structures, erythrocyte and leukocyte count, hematocrit value, sedimentation rate, and coagulation time of the blood cells in the collected samples were calculated. As a result of the infection, while there was a decrease in erythrocyte count, hematocrit value, and coagulation rate, in addition to changes in the morphological structure of blood cells, it was determined that there was a significant increase in the leukocyte count and sedimentation rate. Furthermore, histopathological examination was also performed in the organs of infected fish such as the brain, liver, spleen, kidney, heart, gill, and intestine. Histopathologically, in the infected sea bass, while hemorrhage, diffuse necrosis, and hyaline droplets were detected in the granular brain tissue, hyperemia and hemorrhage were noted in the liver and spleen, and widespread necrosis in the hematopoietic tissue of the kidney, in the gills intensive hyperplasia, an increase in the goblet cell were detected. Although there are studies on lactococcosis in various marine fish species around the world, the infection of L. garvieae in farmed sea bass and various parameters and pathological aspects were investigated in detail for the first time in this study. L. garvieae was determined to have clinical significance for European sea bass with a high economic value.
{"title":"Pathological aspects of experimental infection of Lactococcus garvieae in European Sea Bass (Dicentrarchus labrax L.): Clinical, hematological, and histopathological parameters","authors":"T. Akaylı, Ç. Ürkü, Sena Zeynep Göken","doi":"10.3153/ar22021","DOIUrl":"https://doi.org/10.3153/ar22021","url":null,"abstract":"This study, it was aimed to examine the clinical, hematological, and histopathological aspects of lactococcosis induced in European sea bass (Dicentrarchus labrax), which was experimentally infected with Lactococcus garvieae. For this purpose, the infection was induced intraperitoneally with L. garvieae strain (108 CFU/mL), and blood samples were collected from the infected fish on different days (6, 18, 26, 31, 36, 44, and 48th) of infection. The morphological structures, erythrocyte and leukocyte count, hematocrit value, sedimentation rate, and coagulation time of the blood cells in the collected samples were calculated. As a result of the infection, while there was a decrease in erythrocyte count, hematocrit value, and coagulation rate, in addition to changes in the morphological structure of blood cells, it was determined that there was a significant increase in the leukocyte count and sedimentation rate. Furthermore, histopathological examination was also performed in the organs of infected fish such as the brain, liver, spleen, kidney, heart, gill, and intestine. Histopathologically, in the infected sea bass, while hemorrhage, diffuse necrosis, and hyaline droplets were detected in the granular brain tissue, hyperemia and hemorrhage were noted in the liver and spleen, and widespread necrosis in the hematopoietic tissue of the kidney, in the gills intensive hyperplasia, an increase in the goblet cell were detected. Although there are studies on lactococcosis in various marine fish species around the world, the infection of L. garvieae in farmed sea bass and various parameters and pathological aspects were investigated in detail for the first time in this study. L. garvieae was determined to have clinical significance for European sea bass with a high economic value.","PeriodicalId":13619,"journal":{"name":"International Aquatic Research","volume":"16 1","pages":""},"PeriodicalIF":1.3,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78584219","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Jurmin H. Sarri, Yusop A. Abdulmutalib, Melapearl E. Mohammad Tilka, Ertuğrul Terzi̇, Albaris B. Tahiluddin
One of the problems in Kappaphycus farming is the slow growth in some farms due to nutrient insufficiency caused by overstocking. In the southern Philippines, most seaweed farmers practice inorganic nutrient enrichment of Kappaphycus to boost growth and decrease ice-ice disease occurrence using ammonium phosphate at an average concentration of 8.82 g L-1. In this study, experiments with Kappaphycus striatus enriched with inorganic nutrients were carried out at Pasiagan, Bongao, Tawi-Tawi, southern Philippines, using different inorganic nutrients (T1=8.82 g L-1 of urea, T2=8.82 g L-1 of phosphorus, and T3=control) within 45 days. Seaweeds were enriched in these three inorganic solutions for 30 seconds, placed into a large mat, covered with canvas, and left overnight. After 15 days, findings showed that the specific growth rates of T1 (6.99% day-1) and T3 (6.72% day-1) groups were significantly higher than the T2 (5.84% day-1) group (p<0.05). Inorganic nutrient enrichment did not significantly influence the occurrence of ice-ice disease. Moreover, inorganic nutrient enrichment did not affect the carrageenan yield after 45 days. K. striatus nutrient-enriched with urea could increase growth at day 15, but no effect on the occurrence of ice-ice disease and carrageenan yield. Hence, inorganic nutrient enrichment using urea provides a positive effect to farmed K. striatus by enhancing its growth without affecting its health and carrageenan yield.
在一些农场，由于过度放养导致营养不足，导致Kappaphycus生长缓慢是Kappaphycus养殖的一个问题。在菲律宾南部，大多数海藻养殖户使用平均浓度为8.82 g L-1的磷酸铵对Kappaphycus进行无机营养盐富集，以促进其生长并减少冰-冰病的发生。本研究在菲律宾南部Tawi-Tawi的Pasiagan、Bongao、Bongao等地进行了富无机营养物斑纹Kappaphycus striatus的试验，采用不同无机营养物(T1=8.82 g L-1尿素，T2=8.82 g L-1磷，T3=对照)，试验时间为45 d。海藻在这三种无机溶液中富集30秒，放在一个大垫子上，用帆布覆盖，过夜。15 d后，结果表明:T1组(6.99% d -1)和T3组(6.72% d -1)的特定生长率显著高于T2组(5.84% d -1) (p<0.05);无机营养物的富集对冰冻病的发生无显著影响。此外，无机营养物的富集对45 d后的卡拉胶产量没有影响。富尿素能促进15 d纹状体的生长，但对冰冰病的发生和卡拉胶产量没有影响。因此，利用尿素进行无机营养盐富集，在不影响毛蚶健康和卡拉胶产量的前提下，促进毛蚶生长，对养殖毛蚶具有积极作用。
{"title":"Effects of inorganic nutrient enrichment on the carrageenan yield, growth, and ice-ice disease occurrence of red alga Kappaphycus striatus","authors":"Jurmin H. Sarri, Yusop A. Abdulmutalib, Melapearl E. Mohammad Tilka, Ertuğrul Terzi̇, Albaris B. Tahiluddin","doi":"10.3153/ar22009","DOIUrl":"https://doi.org/10.3153/ar22009","url":null,"abstract":"One of the problems in Kappaphycus farming is the slow growth in some farms due to nutrient insufficiency caused by overstocking. In the southern Philippines, most seaweed farmers practice inorganic nutrient enrichment of Kappaphycus to boost growth and decrease ice-ice disease occurrence using ammonium phosphate at an average concentration of 8.82 g L-1. In this study, experiments with Kappaphycus striatus enriched with inorganic nutrients were carried out at Pasiagan, Bongao, Tawi-Tawi, southern Philippines, using different inorganic nutrients (T1=8.82 g L-1 of urea, T2=8.82 g L-1 of phosphorus, and T3=control) within 45 days. Seaweeds were enriched in these three inorganic solutions for 30 seconds, placed into a large mat, covered with canvas, and left overnight. After 15 days, findings showed that the specific growth rates of T1 (6.99% day-1) and T3 (6.72% day-1) groups were significantly higher than the T2 (5.84% day-1) group (p<0.05). Inorganic nutrient enrichment did not significantly influence the occurrence of ice-ice disease. Moreover, inorganic nutrient enrichment did not affect the carrageenan yield after 45 days. K. striatus nutrient-enriched with urea could increase growth at day 15, but no effect on the occurrence of ice-ice disease and carrageenan yield. Hence, inorganic nutrient enrichment using urea provides a positive effect to farmed K. striatus by enhancing its growth without affecting its health and carrageenan yield.","PeriodicalId":13619,"journal":{"name":"International Aquatic Research","volume":"117 1","pages":""},"PeriodicalIF":1.3,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79988407","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
In the present study, possible effects of using Potamon ibericum for the prevention of zebra mussel (Dreissena polymorpha) invasion in a freshwater ecosystem were investigated. In a recirculating aquaculture system (RAS) supplied with aerated freshwater, 3 individuals of P. ibericum were placed in each of 3 aquariums provided by 100 zebra mussels. Throughout the 90-day monitoring study, mussel consumption was visually counted and then new mussels were introduced daily to complete the number of mussels to hundred, repeatedly each day. Throughout the monitoring study, growth rates, number of mussels consumed, and the number of broken mussel shell pieces were determined. Daily consumption rate of mussels by each crab was recorded as 11.115, 11.104, and 11.107 mussel/crab in the 3 experimental groups, respectively. The consumption rate of mussels per crab was counted as 999.78 over the 90-days experiment. As a result, the findings of this study provide strong evidence that P. ibericum can be used for
{"title":"Biological control of invasive zebra mussel (Dreissen polymorpha) in a freshwater ecosystem through Potamon ibericum","authors":"Halit Kuşku","doi":"10.3153/ar22002","DOIUrl":"https://doi.org/10.3153/ar22002","url":null,"abstract":"In the present study, possible effects of using Potamon ibericum for the prevention of zebra mussel (Dreissena polymorpha) invasion in a freshwater ecosystem were investigated. In a recirculating aquaculture system (RAS) supplied with aerated freshwater, 3 individuals of P. ibericum were placed in each of 3 aquariums provided by 100 zebra mussels. Throughout the 90-day monitoring study, mussel consumption was visually counted and then new mussels were introduced daily to complete the number of mussels to hundred, repeatedly each day. Throughout the monitoring study, growth rates, number of mussels consumed, and the number of broken mussel shell pieces were determined. Daily consumption rate of mussels by each crab was recorded as 11.115, 11.104, and 11.107 mussel/crab in the 3 experimental groups, respectively. The consumption rate of mussels per crab was counted as 999.78 over the 90-days experiment. As a result, the findings of this study provide strong evidence that P. ibericum can be used for","PeriodicalId":13619,"journal":{"name":"International Aquatic Research","volume":"47 11 1","pages":""},"PeriodicalIF":1.3,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83396780","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The blue swimming crab, Portunus segnis, is a Lessepsian and the most abundant and economically significant crab species on the Mediterranean Sea coast of Türkiye. However, there are a few studies on the growth of P. segnis in Türkiye. Our objective is to determine the allometry, and growth parameters of P. segnis in Iskenderun Bay, the Northeastern Mediterranean. Blue swimming crabs were sampled using a bottom trawl net from July 2014 to June 2015. Totally 320 specimens were caught. The carapace width (CW) varied from 38.1 to 163.17 mm (mean: 109.88±27.56 mm) and the total weight (TW) was measured at a minimum of 3.46 and a maximum of 324.36 g. The width (CW)- weight (TW) relationships of the crabs were estimated as log(TW)=2.9028CW-9.0664 (R2=0.7452) for the females and log(TW)=2.9773CW-9.3842 (R2=0.8433) for the males. The carapace width-weight relationships of both sexes indicated that the growth pattern is allometric (p<0.05). The von Bertalanffy growth parameters were computed as CW∞=166.00 mm, K=1.2 year-1, t0=-1.62 years, C=0, WP=0.20, and Φ´=4.519 for all crabs. The von Bertalanffy growth parameters of P. segnis were determined on the coasts of Türkiye, for the first time.
{"title":"Growth parameters of the invasive blue swimming crab Portunus segnis (Forskål, 1775) (Crustacea) in the North-Eastern Mediterranean, Türkiye","authors":"İ. Yeşilyurt, C. Türeli, Sedat Gündoğdu","doi":"10.3153/ar22028","DOIUrl":"https://doi.org/10.3153/ar22028","url":null,"abstract":"The blue swimming crab, Portunus segnis, is a Lessepsian and the most abundant and economically significant crab species on the Mediterranean Sea coast of Türkiye. However, there are a few studies on the growth of P. segnis in Türkiye. Our objective is to determine the allometry, and growth parameters of P. segnis in Iskenderun Bay, the Northeastern Mediterranean. Blue swimming crabs were sampled using a bottom trawl net from July 2014 to June 2015. Totally 320 specimens were caught. The carapace width (CW) varied from 38.1 to 163.17 mm (mean: 109.88±27.56 mm) and the total weight (TW) was measured at a minimum of 3.46 and a maximum of 324.36 g. The width (CW)- weight (TW) relationships of the crabs were estimated as log(TW)=2.9028CW-9.0664 (R2=0.7452) for the females and log(TW)=2.9773CW-9.3842 (R2=0.8433) for the males. The carapace width-weight relationships of both sexes indicated that the growth pattern is allometric (p<0.05). The von Bertalanffy growth parameters were computed as CW∞=166.00 mm, K=1.2 year-1, t0=-1.62 years, C=0, WP=0.20, and Φ´=4.519 for all crabs. The von Bertalanffy growth parameters of P. segnis were determined on the coasts of Türkiye, for the first time.","PeriodicalId":13619,"journal":{"name":"International Aquatic Research","volume":"138 1","pages":""},"PeriodicalIF":1.3,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73750201","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
In order to leave a livable world to future generations, the elimination of environmental pollution, which is one of the important dimensions of sustainability, increases its importance every day. Undoubtedly, among the factors that cause environmental pollution, the role of ships is quite high. The seas are also polluted by the routine operation of ships as well as marine accidents. Pollution arising from the routine operations of ships is caused by the discharge of pollutants such as ballast water, bilge water, sludge or garbage into the sea. In addition, emissions from ships and oil and fuel pollution caused by the routine operation of ships also play an important role in environmental pollution. In this study, the phenomena resulting from the routine operations of ships and causing environmental pollution were examined using the Analytical Hierarchy Process (AHP) method, which is one of the multi-criteria decision-making methods, and the perceptions of ship operators towards environmental pollution were tried to be determined.
{"title":"Determination of the perception of ship management towards environmental pollion caused by routine operations of ships","authors":"Osman Arslan, M. S. Solmaz, H. B. Usluer","doi":"10.3153/ar22005","DOIUrl":"https://doi.org/10.3153/ar22005","url":null,"abstract":"In order to leave a livable world to future generations, the elimination of environmental pollution, which is one of the important dimensions of sustainability, increases its importance every day. Undoubtedly, among the factors that cause environmental pollution, the role of ships is quite high. The seas are also polluted by the routine operation of ships as well as marine accidents. Pollution arising from the routine operations of ships is caused by the discharge of pollutants such as ballast water, bilge water, sludge or garbage into the sea. In addition, emissions from ships and oil and fuel pollution caused by the routine operation of ships also play an important role in environmental pollution. In this study, the phenomena resulting from the routine operations of ships and causing environmental pollution were examined using the Analytical Hierarchy Process (AHP) method, which is one of the multi-criteria decision-making methods, and the perceptions of ship operators towards environmental pollution were tried to be determined.","PeriodicalId":13619,"journal":{"name":"International Aquatic Research","volume":"1 1","pages":""},"PeriodicalIF":1.3,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88119413","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Today, fungicide toxicity is quite common in aquatic ecosystems, and this situation adversely affects marine organisms. For this reason, it is essential to determine the effects of fungicides on aquatic organisms and to try to prevent organisms from being exposed to these toxic chemicals. In this study, changes in cholinergic system enzymes and (malondialdehyde) MDA levels as a result of exposure to acute fungicide toxicity in Van fish (Alburnus tarichi, Güldenstädt 1814) were investigated. Brain tissue was taken from Van fish exposed to 2.5 M Tebuconazole used in agriculture by sampling at 24, 48, 72, and 96 hours. Brain tissue acetylcholinesterase (AChE), butyrylcholinesterase (BChE) activities, and MDA levels were measured in this context. In the study, AChE (0.965 ±0.03, 0.575±0.01) and BChE (0.421 ±0.02, 0,291 ±0.01) activities decreased in Van fish brain tissue due to exposure to Tebuconazole, but MDA (0.099 ±0.01, 0.192 ±0.01) level increased (p < 0.05).
{"title":"The responses of cholinergic system in the brain tissue of Van Fish (Alburnus tarichi) exposed to antifungal tebuconazole compound toxicity","authors":"A. ÇİLİNGİR YELTEKİN","doi":"10.3153/ar22010","DOIUrl":"https://doi.org/10.3153/ar22010","url":null,"abstract":"Today, fungicide toxicity is quite common in aquatic ecosystems, and this situation adversely affects marine organisms. For this reason, it is essential to determine the effects of fungicides on aquatic organisms and to try to prevent organisms from being exposed to these toxic chemicals. In this study, changes in cholinergic system enzymes and (malondialdehyde) MDA levels as a result of exposure to acute fungicide toxicity in Van fish (Alburnus tarichi, Güldenstädt 1814) were investigated. Brain tissue was taken from Van fish exposed to 2.5 M Tebuconazole used in agriculture by sampling at 24, 48, 72, and 96 hours. Brain tissue acetylcholinesterase (AChE), butyrylcholinesterase (BChE) activities, and MDA levels were measured in this context. In the study, AChE (0.965 ±0.03, 0.575±0.01) and BChE (0.421 ±0.02, 0,291 ±0.01) activities decreased in Van fish brain tissue due to exposure to Tebuconazole, but MDA (0.099 ±0.01, 0.192 ±0.01) level increased (p < 0.05).","PeriodicalId":13619,"journal":{"name":"International Aquatic Research","volume":"236 1","pages":""},"PeriodicalIF":1.3,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73585937","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Seda Kuşoğlu Gültekin, Elif Mertoğlu Kamalı, K. Yılancıoğlu, N. Arda
Microcystis aeruginosa, which spreads in five continents in the world and reported in drinking water resources in 257 countries, is a dangerous microalgae for human and animal health due to its toxins. The aim of current study was to evaluate the effects of M. aeruginosa extract and its chromatographically separated fractions on human endothelial cells. In this context, crude extract was prepared from M. aeruginosa cultured in BG-11 medium, and it was fractionated by an optimized HPLC method. Algae extract and its six fractions were then analyzed for their cytotoxic effects on ECV304 using MTT assay. The results revealed that algae extract inhibited ECV304 cells by around 72%, a higher percentage than all fractions. The most toxic fraction was the first fraction, which inhibited the cells by 55%. Other fractions, except the third one, were also toxic with 35-40% inhibition percentages. Third fraction and certain doses of some fractions showed proliferative activity on ECV304 cells. These results showed that the activities of the total extract and its fractions in promoting or inhibiting cell proliferation varied depending on not only the content but also the treatment dose.
{"title":"Dose-dependent cytotoxic and proliferative effects of Microcystis aeruginosa extract and its fractions on human endothelial cells","authors":"Seda Kuşoğlu Gültekin, Elif Mertoğlu Kamalı, K. Yılancıoğlu, N. Arda","doi":"10.3153/ar22011","DOIUrl":"https://doi.org/10.3153/ar22011","url":null,"abstract":"Microcystis aeruginosa, which spreads in five continents in the world and reported in drinking water resources in 257 countries, is a dangerous microalgae for human and animal health due to its toxins. The aim of current study was to evaluate the effects of M. aeruginosa extract and its chromatographically separated fractions on human endothelial cells. In this context, crude extract was prepared from M. aeruginosa cultured in BG-11 medium, and it was fractionated by an optimized HPLC method. Algae extract and its six fractions were then analyzed for their cytotoxic effects on ECV304 using MTT assay. The results revealed that algae extract inhibited ECV304 cells by around 72%, a higher percentage than all fractions. The most toxic fraction was the first fraction, which inhibited the cells by 55%. Other fractions, except the third one, were also toxic with 35-40% inhibition percentages. Third fraction and certain doses of some fractions showed proliferative activity on ECV304 cells. These results showed that the activities of the total extract and its fractions in promoting or inhibiting cell proliferation varied depending on not only the content but also the treatment dose.","PeriodicalId":13619,"journal":{"name":"International Aquatic Research","volume":"69 1","pages":""},"PeriodicalIF":1.3,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90597948","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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