Accurate identification of fish species during the planktonic stages is vital for detecting spawning, foraging, and growth sites of fish species to provide data for stock assessment, environmental impact assessment, and ecological monitoring. In this study, seasonal ichthyoplankton abundance, community composition, and main possible environmental drivers that influence their community composition were investigated in the Southeastern Black Sea. Ichthyoplankton samples were seasonally collected for a year from four stations, two coastal and two offshore sites. DNA barcoding method was applied to identify ichthyoplankton specimens. Of 33 ichthyoplankton taxa identified using DNA barcoding, 31 taxa were identified at species level and 2 taxa were identified at genus level due to unavailability of reference sequences from the Black Sea in public databases. Engraulis encrasicolus, Sprattus sprattus, Mullus barbatus, and Trachurus mediterraneus were identified as the most abundant species. Engraulis encrasicolus alone accounted for nearly 91.5% of the total catch. Seasonality had a strong influence on the ichthyoplankton assemblages. The highest ichthyoplankton abundance was found in summer, followed by winter, autumn, and spring. While 30 fish taxa were identified in summer, 10 taxa were identified in spring, 3 taxa were identified in both autumn and winter. Ichthyoplankton communities were dominated by E. encrasicolus, M. barbatus, and T. mediterraneus specimens in summer, S. sprattus, and M. merlangus specimens in winter, S. sprattus and G. mediterraneus specimens in autumn, Alosa immaculata and Merlangius merlangus in spring. The ichthyoplankton abundance and richness was generally higher in coastal stations in each season. Engraulis encrasicolus, S. sprattus, M. merlangus, P. incognitus were the only species that detected in more than 4 hauls. On the other hand, M. batrachocephalus, P. flesus, S. abester, T. draco, U. cirrosa, and C. lucerna were only detected in a single haul. Overall, the dominant environmental variable affecting abundance of ichthyoplankton was temperature. The relationship between community composition and environmental variable based on nMDS analysis indicated that ichthyoplankton assemblage structure is also influenced by salinity, dissolved oxygen, chlorophyll-a, NO2, and NO3.
{"title":"Genetic Identification of Ichthyoplankton in the Black Sea and Their Abundance and Community Assemblages","authors":"R. C. Ozturk","doi":"10.4194/trjfas23514","DOIUrl":"https://doi.org/10.4194/trjfas23514","url":null,"abstract":"Accurate identification of fish species during the planktonic stages is vital for detecting spawning, foraging, and growth sites of fish species to provide data for stock assessment, environmental impact assessment, and ecological monitoring. In this study, seasonal ichthyoplankton abundance, community composition, and main possible environmental drivers that influence their community composition were investigated in the Southeastern Black Sea. Ichthyoplankton samples were seasonally collected for a year from four stations, two coastal and two offshore sites. DNA barcoding method was applied to identify ichthyoplankton specimens. Of 33 ichthyoplankton taxa identified using DNA barcoding, 31 taxa were identified at species level and 2 taxa were identified at genus level due to unavailability of reference sequences from the Black Sea in public databases. Engraulis encrasicolus, Sprattus sprattus, Mullus barbatus, and Trachurus mediterraneus were identified as the most abundant species. Engraulis encrasicolus alone accounted for nearly 91.5% of the total catch. Seasonality had a strong influence on the ichthyoplankton assemblages. The highest ichthyoplankton abundance was found in summer, followed by winter, autumn, and spring. While 30 fish taxa were identified in summer, 10 taxa were identified in spring, 3 taxa were identified in both autumn and winter. Ichthyoplankton communities were dominated by E. encrasicolus, M. barbatus, and T. mediterraneus specimens in summer, S. sprattus, and M. merlangus specimens in winter, S. sprattus and G. mediterraneus specimens in autumn, Alosa immaculata and Merlangius merlangus in spring. The ichthyoplankton abundance and richness was generally higher in coastal stations in each season. Engraulis encrasicolus, S. sprattus, M. merlangus, P. incognitus were the only species that detected in more than 4 hauls. On the other hand, M. batrachocephalus, P. flesus, S. abester, T. draco, U. cirrosa, and C. lucerna were only detected in a single haul. Overall, the dominant environmental variable affecting abundance of ichthyoplankton was temperature. The relationship between community composition and environmental variable based on nMDS analysis indicated that ichthyoplankton assemblage structure is also influenced by salinity, dissolved oxygen, chlorophyll-a, NO2, and NO3.","PeriodicalId":23978,"journal":{"name":"Turkish Journal of Fisheries and Aquatic Sciences","volume":" ","pages":""},"PeriodicalIF":1.3,"publicationDate":"2023-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48991819","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}
Yasemen Senturk, Muhammet Emanet, Y. Ceylan, Ulgen Aytan
Microplastics (MPs) occurrence in greater pipefish Syngnathus acus was assessed in the Black Sea for the first time. MPs were found in 21 % of total pipefish examined. MPs were mainly fibres in shape (89 %), black in colour (52 %) and 0.2- 1 mm (52 %) in size. The mean MP concentration was 0.30 mp. fish-1 (considering all the fish analysed) and was 1.38 mp. fish-1 (considering the fish that ingested them). The frequency of MP occurrence in male pipefish was higher (23.5 %) compared to females (20.7%) and immatures (16.7 %). 91.7 % of the polymers found were synthetic with the polyethylene terephthalate (PET) (29%) being the most common polymers. FTIR spectroscopy also confirmed the presence of the plastic-related compounds, butyl stearate (BS) and glyceraldehyde unnatural form (GA) in the analysed samples. Our results show that S. acus, which is an ecologically important demersal fish, is contaminated by MPs in the Black Sea and that there is an urgent assessment to better understand the environmental fate of MPs in the Black Sea and taking necessity measures to reduce the amount of plastics entering this basin.
{"title":"The First Evidence of Microplastics Occurrence in Greater Pipefish (Syngnathus acus Linnaetabus, 1758) in the Black Sea","authors":"Yasemen Senturk, Muhammet Emanet, Y. Ceylan, Ulgen Aytan","doi":"10.4194/trjfas23764","DOIUrl":"https://doi.org/10.4194/trjfas23764","url":null,"abstract":"Microplastics (MPs) occurrence in greater pipefish Syngnathus acus was assessed in the Black Sea for the first time. MPs were found in 21 % of total pipefish examined. MPs were mainly fibres in shape (89 %), black in colour (52 %) and 0.2- 1 mm (52 %) in size. The mean MP concentration was 0.30 mp. fish-1 (considering all the fish analysed) and was 1.38 mp. fish-1 (considering the fish that ingested them). The frequency of MP occurrence in male pipefish was higher (23.5 %) compared to females (20.7%) and immatures (16.7 %). 91.7 % of the polymers found were synthetic with the polyethylene terephthalate (PET) (29%) being the most common polymers. FTIR spectroscopy also confirmed the presence of the plastic-related compounds, butyl stearate (BS) and glyceraldehyde unnatural form (GA) in the analysed samples. Our results show that S. acus, which is an ecologically important demersal fish, is contaminated by MPs in the Black Sea and that there is an urgent assessment to better understand the environmental fate of MPs in the Black Sea and taking necessity measures to reduce the amount of plastics entering this basin.","PeriodicalId":23978,"journal":{"name":"Turkish Journal of Fisheries and Aquatic Sciences","volume":" ","pages":""},"PeriodicalIF":1.3,"publicationDate":"2023-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46031646","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}
Raktim Sarmah, H. Pokhrel, Ruhul Ameen, Dipanka Nath, S. K. Bhagabati, R. Dutta
Fenpropathrin displays enduring effects on aquatic environment which can be highly toxic and accumulative to non-targeted aquatic organisms like fish. While most of the previous studies focused on the toxicity of analytical grade of Fenpropathrin, insufficient attention has been paid to compare toxicity of the active ingredient (a.i) with its commercial formulation. Therefore, the present study is an attempt to evaluate the lethal as well as sublethal toxicity along with cardiac, morphological, behavioral and neurotoxic biomarker responses induced by Fenpropathrin and its commercial formulation Meothrin and Danitol on zebrafish embryos. The study reveals 96-hour (h) LC50 values that are 0.156(0.121-0.202), 0.953(0.736-1.248) and 1.168(0.913- 1.503) mg a.i/L; 96 h EC50 values are 0.016, 0.152 and 0.369 mg a.i/L and Teratogenic Index (TI) ratio of 9.75, 6.26 and 3.16 for Fenpropathrin, Meothrin and Danitol respectively (Fenpropathrin>Meothrin>Danitol). The reduction in toxicity in commercial formulations may be attributed to Control Release Systems (CRS). The study also reveals that intensity of malformations, teratogenic potential, behavioral abnormality, cardiotoxicity and neurotoxicity are more prominent in Fenpropathrin when compared to its two formulations.
甲氰菊酯对水生环境具有持久的影响，对鱼类等非靶向水生生物具有剧毒和蓄积性。虽然以前的大多数研究都集中在分析级甲氰菊酯的毒性上，但对活性成分（a.i）与其商业制剂的毒性比较关注不足。因此，本研究试图评估甲氰菊酯及其商业制剂Meothrin和Danitol对斑马鱼胚胎的致死性和亚致死性毒性，以及心脏、形态、行为和神经毒性生物标志物反应。研究表明，96小时（h）LC50值分别为0.156（0.121-0.202）、0.953（0.736-1.248）和1.168（0.913-1.503）mg a.i/L；96 h EC50值分别为0.016、0.152和0.369 mg a.i/L，氟丙菊酯、甲氧麻黄酮和丹妮醇的致畸指数（TI）比分别为9.75、6.26和3.16（氟丙菊酯>甲氧麻酚>丹妮醇）。商业制剂毒性的降低可归因于控制释放系统（CRS）。研究还表明，与两种制剂相比，甲氰菊酯的畸形强度、致畸潜力、行为异常、心脏毒性和神经毒性更为突出。
{"title":"Comparative Toxicity Analysis of Fenpropathrin with Its Two Commercial Formulations on Developing Zebrafish Embryos","authors":"Raktim Sarmah, H. Pokhrel, Ruhul Ameen, Dipanka Nath, S. K. Bhagabati, R. Dutta","doi":"10.4194/trjfas23405","DOIUrl":"https://doi.org/10.4194/trjfas23405","url":null,"abstract":"Fenpropathrin displays enduring effects on aquatic environment which can be highly toxic and accumulative to non-targeted aquatic organisms like fish. While most of the previous studies focused on the toxicity of analytical grade of Fenpropathrin, insufficient attention has been paid to compare toxicity of the active ingredient (a.i) with its commercial formulation. Therefore, the present study is an attempt to evaluate the lethal as well as sublethal toxicity along with cardiac, morphological, behavioral and neurotoxic biomarker responses induced by Fenpropathrin and its commercial formulation Meothrin and Danitol on zebrafish embryos. The study reveals 96-hour (h) LC50 values that are 0.156(0.121-0.202), 0.953(0.736-1.248) and 1.168(0.913- 1.503) mg a.i/L; 96 h EC50 values are 0.016, 0.152 and 0.369 mg a.i/L and Teratogenic Index (TI) ratio of 9.75, 6.26 and 3.16 for Fenpropathrin, Meothrin and Danitol respectively (Fenpropathrin>Meothrin>Danitol). The reduction in toxicity in commercial formulations may be attributed to Control Release Systems (CRS). The study also reveals that intensity of malformations, teratogenic potential, behavioral abnormality, cardiotoxicity and neurotoxicity are more prominent in Fenpropathrin when compared to its two formulations.","PeriodicalId":23978,"journal":{"name":"Turkish Journal of Fisheries and Aquatic Sciences","volume":" ","pages":""},"PeriodicalIF":1.3,"publicationDate":"2023-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48571008","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}
Anthropogenic pressures on freshwater ecosystems are growing and pose serious threats to endemic fish species. This study aimed to identify the effects of anthropogenic pressures on an endangered species, Pseudophoxinus crassus (Ladiges, 1960), in the semi-arid Konya Closed Basin of Türkiye. The distribution area of the species was found to be reduced and the only population sampled exhibited a high incidence of external anomalies. It is hard to identify the origin of the anomalies; however, abrupt increases in salinity and reductions in dissolved oxygen values indicate that intensive agricultural activities might be responsible for the pressures on the population. Additionally, temporal changes in population growth parameters were identified and the effects of anomalies on fish condition factors were examined. Fulton`s condition factor was found to be reduced among specimens with external anomalies. This relationship between anomalies and fitness as reflected by the condition factor was also observed for two other endemic species. It is unclear whether these anomalies affect feeding behaviours, although specimens with lower condition factors are more likely to exhibit anomalies. However, it is clear that without the rehabilitation or restoration of natural habitats, fitness reduction will severely affect the statuses of populations, particularly in cases of isolated populations.
{"title":"Land-use and Fish Condition Changes for Over a Decade on Konya Closed Basin, are External Anomalies Affecting the Fish Condition?","authors":"Mustafa Korkmaz, F. Mangit, S. Yerli","doi":"10.4194/trjfas22597","DOIUrl":"https://doi.org/10.4194/trjfas22597","url":null,"abstract":"Anthropogenic pressures on freshwater ecosystems are growing and pose serious threats to endemic fish species. This study aimed to identify the effects of anthropogenic pressures on an endangered species, Pseudophoxinus crassus (Ladiges, 1960), in the semi-arid Konya Closed Basin of Türkiye. The distribution area of the species was found to be reduced and the only population sampled exhibited a high incidence of external anomalies. It is hard to identify the origin of the anomalies; however, abrupt increases in salinity and reductions in dissolved oxygen values indicate that intensive agricultural activities might be responsible for the pressures on the population. Additionally, temporal changes in population growth parameters were identified and the effects of anomalies on fish condition factors were examined. Fulton`s condition factor was found to be reduced among specimens with external anomalies. This relationship between anomalies and fitness as reflected by the condition factor was also observed for two other endemic species. It is unclear whether these anomalies affect feeding behaviours, although specimens with lower condition factors are more likely to exhibit anomalies. However, it is clear that without the rehabilitation or restoration of natural habitats, fitness reduction will severely affect the statuses of populations, particularly in cases of isolated populations.","PeriodicalId":23978,"journal":{"name":"Turkish Journal of Fisheries and Aquatic Sciences","volume":" ","pages":""},"PeriodicalIF":1.3,"publicationDate":"2023-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42546433","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}
L. R. Arreola, E. Quiroz‐Guzmán, J. L. Caballero, Esther I. Ponce García, Julio Humberto Córdova Murueta, F. Carreño
Enzyme-pretreated rice bran is commonly used in biofloc aquaculture. In this work, crude enzymes from discards of P. vannamei were used for enzymatic pre-treatment of rice bran. P. vannamei crude enzyme extract is rich in proteases and amylases that hydrolyze casein and rice bran starch, respectively, at a rate comparable to commercial enzymes. In seawater media, P. vannamei midgut gland amylase activity is significantly higher than to commercial enzymes. Data on the use of enzymatic extracts obtained from shrimp discards is presented, contributing to future sustainable use of agriculture, aquaculture, and fisheries resources by probing an application of such by-products.
{"title":"Shrimp Hepatopancreatic Crude Enzymes as Aids in Rice Bran Hydrolysis: Potential Contributors to Sustainable Aquaculture","authors":"L. R. Arreola, E. Quiroz‐Guzmán, J. L. Caballero, Esther I. Ponce García, Julio Humberto Córdova Murueta, F. Carreño","doi":"10.4194/trjfas22332","DOIUrl":"https://doi.org/10.4194/trjfas22332","url":null,"abstract":"Enzyme-pretreated rice bran is commonly used in biofloc aquaculture. In this work, crude enzymes from discards of P. vannamei were used for enzymatic pre-treatment of rice bran. P. vannamei crude enzyme extract is rich in proteases and amylases that hydrolyze casein and rice bran starch, respectively, at a rate comparable to commercial enzymes. In seawater media, P. vannamei midgut gland amylase activity is significantly higher than to commercial enzymes. Data on the use of enzymatic extracts obtained from shrimp discards is presented, contributing to future sustainable use of agriculture, aquaculture, and fisheries resources by probing an application of such by-products.","PeriodicalId":23978,"journal":{"name":"Turkish Journal of Fisheries and Aquatic Sciences","volume":" ","pages":""},"PeriodicalIF":1.3,"publicationDate":"2023-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41557370","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}
In pseudomeiobenthos, juveniles of 28 polychaetes species were recorded, of which Alitta succinea (Leuckart, 1847), Polydora cornuta Bosc, 1802, and Prionospio cirrifera Wiren, 1883 dominated in density. Based on the results of analysis of variance (ANOVA), a significant dependence of the variability of the α-diversity of juveniles of polychaetes on the type of substrate and the temperature of the bottom water layer was established. It is shown that the local diversity of polychaetes juveniles is the highest on the shell (here we refer to the type of substrate) and decreases with increasing degree of substrate silting. With an increase in the temperature of the near-bottom water layer, the α-diversity of juveniles of polychaetes increases, which is associated with the timing of reproduction of most polychaetes species. A close positive correlation was found between the densities of juveniles and adults of P. cornuta. This confirms the important role of the presence of P. cornuta settlements in the macrozoobenthos in the selectivity of their locations by pelagic larvae during transition to the bottom. It has been established that in the study area, the active transition of pelagic larvae of polychaetes to the bottom occurs at a depth of up to 40 m.
{"title":"Influence the North-western Part of the Black Sea Habitat Factors on the Meiobenthic Polychaetes","authors":"O. Bondarenko, Ludmyla Vorobyova","doi":"10.4194/trjfas22222","DOIUrl":"https://doi.org/10.4194/trjfas22222","url":null,"abstract":"In pseudomeiobenthos, juveniles of 28 polychaetes species were recorded, of which Alitta succinea (Leuckart, 1847), Polydora cornuta Bosc, 1802, and Prionospio cirrifera Wiren, 1883 dominated in density. Based on the results of analysis of variance (ANOVA), a significant dependence of the variability of the α-diversity of juveniles of polychaetes on the type of substrate and the temperature of the bottom water layer was established. It is shown that the local diversity of polychaetes juveniles is the highest on the shell (here we refer to the type of substrate) and decreases with increasing degree of substrate silting. With an increase in the temperature of the near-bottom water layer, the α-diversity of juveniles of polychaetes increases, which is associated with the timing of reproduction of most polychaetes species. A close positive correlation was found between the densities of juveniles and adults of P. cornuta. This confirms the important role of the presence of P. cornuta settlements in the macrozoobenthos in the selectivity of their locations by pelagic larvae during transition to the bottom. It has been established that in the study area, the active transition of pelagic larvae of polychaetes to the bottom occurs at a depth of up to 40 m.","PeriodicalId":23978,"journal":{"name":"Turkish Journal of Fisheries and Aquatic Sciences","volume":" ","pages":""},"PeriodicalIF":1.3,"publicationDate":"2023-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47084735","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}
The cetacean observation was made during the 56th Japanese Antarctic Research Expedition (JARE - 56) cruise on the icebreaker SHIRASE, from 30 November to 15 December 2014 and from 15 February to 9 March 2015, in the Indian Ocean Sector of the Southern Ocean. A total of 28 sightings with 64 individuals of four cetacean species, humpback whale, (Megaptera novaeangliae), fin whale (Balaenoptera physalus), Antarctic minke whale (Balaenoptera bonaerensis), and killer whale (Orcinus orca), are reported. The most sighted species was the humpback whale (13 sightings) and the maximum number of individuals in a group was six for the same species. All sightings were made higher than 60 degrees South, close to the Antarctica coast.
{"title":"Sightings of Cetaceans during JARE - 56 in the Indian Sector of the Southern Ocean","authors":"B. Öztürk, Kentaro Watanabe, A. Öztürk","doi":"10.4194/trjfas23271","DOIUrl":"https://doi.org/10.4194/trjfas23271","url":null,"abstract":"The cetacean observation was made during the 56th Japanese Antarctic Research Expedition (JARE - 56) cruise on the icebreaker SHIRASE, from 30 November to 15 December 2014 and from 15 February to 9 March 2015, in the Indian Ocean Sector of the Southern Ocean. A total of 28 sightings with 64 individuals of four cetacean species, humpback whale, (Megaptera novaeangliae), fin whale (Balaenoptera physalus), Antarctic minke whale (Balaenoptera bonaerensis), and killer whale (Orcinus orca), are reported. The most sighted species was the humpback whale (13 sightings) and the maximum number of individuals in a group was six for the same species. All sightings were made higher than 60 degrees South, close to the Antarctica coast.","PeriodicalId":23978,"journal":{"name":"Turkish Journal of Fisheries and Aquatic Sciences","volume":" ","pages":""},"PeriodicalIF":1.3,"publicationDate":"2023-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47832981","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}
Enes Vanli, A. Harlıoğlu, M. Harlıoğlu, Görkem Kirmizikaya, O. Yilmaz
The fatty acid composition, cholesterol and fat-soluble vitamin levels in the muscle tissue of economically important freshwater fish Luciobarbus esocinus, Capoeta trutta and Luciobarbus mystaceus were investigated. The analysis of fatty acid methyl esters was carried out by gas chromatography, and cholesterol and fat-soluble vitamin amounts were determined by high-performance liquid chromatography (HPLC). Among polyunsaturated fatty acids (PUFA), eicosapentaenoic acid (EPA, C20:5n-3) was found to be higher in C. trutta (14.84%) compared to the other fish species, while the highest amount of docosahexanoic acid (DHA, C22:6n-3) was determined in L. mystaceus (20.43%). While the maximum amount of total n-3/n-6 PUFA ratio was determined for C. trutta with 4.64%, it was determined that the sum of EPA and DHA from n-3 series fatty acids was higher in C. trutta with 31.74%. When the fat-soluble vitamin and cholesterol levels of the species were compared, it was found that the difference between the amounts of δ-tocopherol, α-tocopherol, D3, K1, K2 and cholesterol did not differ between the species. In conclusion, L. esocinus, C. trutta and L. mystaceus living in the Keban Dam Lake are valuable food source in terms of fatty acids, vitamin and cholesterol. It is thought that the findings of this study is beneficial for researchers and fish consumers.
{"title":"Determination of Fatty Acid Composition, Cholesterol and Fat-soluble Vitamin Levels of Capoeta trutta, Luciobarbus mystaceus and Luciobarbus esocinus Caught from the Keban Dam Lake, Elazig, Turkiye","authors":"Enes Vanli, A. Harlıoğlu, M. Harlıoğlu, Görkem Kirmizikaya, O. Yilmaz","doi":"10.4194/trjfas22526","DOIUrl":"https://doi.org/10.4194/trjfas22526","url":null,"abstract":"The fatty acid composition, cholesterol and fat-soluble vitamin levels in the muscle tissue of economically important freshwater fish Luciobarbus esocinus, Capoeta trutta and Luciobarbus mystaceus were investigated. The analysis of fatty acid methyl esters was carried out by gas chromatography, and cholesterol and fat-soluble vitamin amounts were determined by high-performance liquid chromatography (HPLC). Among polyunsaturated fatty acids (PUFA), eicosapentaenoic acid (EPA, C20:5n-3) was found to be higher in C. trutta (14.84%) compared to the other fish species, while the highest amount of docosahexanoic acid (DHA, C22:6n-3) was determined in L. mystaceus (20.43%). While the maximum amount of total n-3/n-6 PUFA ratio was determined for C. trutta with 4.64%, it was determined that the sum of EPA and DHA from n-3 series fatty acids was higher in C. trutta with 31.74%. When the fat-soluble vitamin and cholesterol levels of the species were compared, it was found that the difference between the amounts of δ-tocopherol, α-tocopherol, D3, K1, K2 and cholesterol did not differ between the species. In conclusion, L. esocinus, C. trutta and L. mystaceus living in the Keban Dam Lake are valuable food source in terms of fatty acids, vitamin and cholesterol. It is thought that the findings of this study is beneficial for researchers and fish consumers.","PeriodicalId":23978,"journal":{"name":"Turkish Journal of Fisheries and Aquatic Sciences","volume":" ","pages":""},"PeriodicalIF":1.3,"publicationDate":"2023-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42075246","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}
N. D. Hettige, Rohasliney Hashim, A. A. Kutty, Z. Ashaari
The main goal of this study was to develop a model for organic pollution assessment. Seven sampling sites in six rivers in the Rawang sub-basin, Selangor River, Malaysia, were selected with one reference site. The sampling sites near the fish farm were used to develop the model. SR2 was used for the validation of the developed model. Benthic macroinvertebrates and water sampling were conducted from April 2019 to March 2020. The Principal Components Analysis (PCA) and regression were conducted to select the most representing benthic macroinvertebrates family. Based on the score value (variance coefficient) of each benthic macroinvertebrates family, the cumulative score value of each sampling site was calculated (i.e., 18=6 sampling sites x 3 replicates). The nine benthic macroinvertebrate families (Baetidae, Libellulidae, Protoneuridae Chironomidae, Curbicullidae Hydropchysidae, Tubificidae, Lumbriculiade, and Naididae) were identified using PCA and regression. The cluster analysis and mean confidence intervals were used to classify water quality classes precisely. Finally, three different value scales were produced to represent the level of contamination (i.e., <0.69 as organically polluted, 0.69-0.87 as slightly organic polluted, and >0.87 as clean status). The newly developed model was validated. The results produced after validation were better than the water quality status from other studies based on the BMWP/BMWPThai score. This study concludes that the developed model can evaluate river organic contamination successfully. model can evaluate river organic contamination successfully.
{"title":"A New Model for Organic Contamination Assessments Using Benthic Macroinvertebrates as Biological Indicators","authors":"N. D. Hettige, Rohasliney Hashim, A. A. Kutty, Z. Ashaari","doi":"10.4194/trjfas22423","DOIUrl":"https://doi.org/10.4194/trjfas22423","url":null,"abstract":"The main goal of this study was to develop a model for organic pollution assessment. Seven sampling sites in six rivers in the Rawang sub-basin, Selangor River, Malaysia, were selected with one reference site. The sampling sites near the fish farm were used to develop the model. SR2 was used for the validation of the developed model. Benthic macroinvertebrates and water sampling were conducted from April 2019 to March 2020. The Principal Components Analysis (PCA) and regression were conducted to select the most representing benthic macroinvertebrates family. Based on the score value (variance coefficient) of each benthic macroinvertebrates family, the cumulative score value of each sampling site was calculated (i.e., 18=6 sampling sites x 3 replicates). The nine benthic macroinvertebrate families (Baetidae, Libellulidae, Protoneuridae Chironomidae, Curbicullidae Hydropchysidae, Tubificidae, Lumbriculiade, and Naididae) were identified using PCA and regression. The cluster analysis and mean confidence intervals were used to classify water quality classes precisely. Finally, three different value scales were produced to represent the level of contamination (i.e., <0.69 as organically polluted, 0.69-0.87 as slightly organic polluted, and >0.87 as clean status). The newly developed model was validated. The results produced after validation were better than the water quality status from other studies based on the BMWP/BMWPThai score. This study concludes that the developed model can evaluate river organic contamination successfully. model can evaluate river organic contamination successfully.","PeriodicalId":23978,"journal":{"name":"Turkish Journal of Fisheries and Aquatic Sciences","volume":" ","pages":""},"PeriodicalIF":1.3,"publicationDate":"2023-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47692569","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}
T. George, Grigoras Daniel, Năstase Aurel, Păunescu Cătălin, Galatchi Madalina
With the growth of the human population, the need for food resources increases, so the pressure on living marine resources also increases. In addition to this aspect, the Black Sea ecosystem during recent decades suffered changes that determined the deterioration of all components of the marine ecosystem, which had direct impact on decreasing the biological diversity and productivity, affecting the quality of life and ecological balance. The species Alosa immaculata (Bennet, 1835) - Pontic shad is of high commercial value and with an important role in the livelihoods of many local communities across the Black Sea coast. However, the status of Pontic shad fisheries is unknown, mainly because is a status of data-poor fish stocks. Thus, growth parameters were determined in a total of 783 individuals with a biomass of 194.5 kg from 9 fishing points of the Romanian Black Sea Coast. For the estimated parameters of length-weight relation the combined data and sexes have been used, coefficient of determination (r²) was 0.794 and b value 2.879. A negative allometric growth has been observed for the species where b<3. The virtual population analysis (VPA) by lengths was performed using the FISAT II software. Catch data previously determined were used to apply the model: length class frequency set, coefficients a=0.0134 (2021) and b=2.879 (2021) of the length-weight relationship, natural mortality M=1.12/year, L∞=37.8, k=0.87/year. The main aim of this paper is to provide an overview of the current status and trends of this valuable resource.
{"title":"Assessing of Pontic Shad (Alosa immaculata, Bennett 1835) Stock Status from Romanian Black Sea Coast","authors":"T. George, Grigoras Daniel, Năstase Aurel, Păunescu Cătălin, Galatchi Madalina","doi":"10.4194/trjfas23217","DOIUrl":"https://doi.org/10.4194/trjfas23217","url":null,"abstract":"With the growth of the human population, the need for food resources increases, so the pressure on living marine resources also increases. In addition to this aspect, the Black Sea ecosystem during recent decades suffered changes that determined the deterioration of all components of the marine ecosystem, which had direct impact on decreasing the biological diversity and productivity, affecting the quality of life and ecological balance.\u0000The species Alosa immaculata (Bennet, 1835) - Pontic shad is of high commercial value and with an important role in the livelihoods of many local communities across the Black Sea coast. However, the status of Pontic shad fisheries is unknown, mainly because is a status of data-poor fish stocks. Thus, growth parameters were determined in a total of 783 individuals with a biomass of 194.5 kg from 9 fishing points of the Romanian Black Sea Coast. For the estimated parameters of length-weight relation the combined data and sexes have been used, coefficient of determination (r²) was 0.794 and b value 2.879. A negative allometric growth has been observed for the species where b<3. The virtual population analysis (VPA) by lengths was performed using the FISAT II software. Catch data previously determined were used to apply the model: length class frequency set, coefficients a=0.0134 (2021) and b=2.879 (2021) of the length-weight relationship, natural mortality M=1.12/year, L∞=37.8, k=0.87/year. The main aim of this paper is to provide an overview of the current status and trends of this valuable resource.","PeriodicalId":23978,"journal":{"name":"Turkish Journal of Fisheries and Aquatic Sciences","volume":" ","pages":""},"PeriodicalIF":1.3,"publicationDate":"2023-02-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45340822","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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