Turkish Journal of Fisheries and Aquatic Sciences最新文献

{"title":"Only Survivors Grow – Effects of Predation on Stocked Juvenile Common Carp (Cyprinus carpio Linnaeus, 1758) in a Stagnant Waterbody","authors":"Valentin Sturmberger, G. Unfer, T. Friedrich","doi":"10.4194/trjfas23538","DOIUrl":"https://doi.org/10.4194/trjfas23538","url":null,"abstract":"This study aims to investigate the suitability of an entirely stocking-based fisheries management strategy to establish a self-sustaining carp population in two water bodies within the Danube catchment east of Vienna. The assessment was generally based on two factors: the effect of predation on juvenile carp`s mortality and potential differences in the growing performance of different age classes. The investigation on predation effects showed, that after one year ~541 of initially 1000 stocked K1 survived in the water body with decreased pressure of predation, while there was no evidence of surviving stocked juveniles in the water body with increased pressure. Regarding the growth-rate, the stocked K1 showed the overall steepest growth curve compared both to the stocked K2 cohort and selected wild populations. After five years the younger stocked cohorts ML was even higher than the older cohorts one at the same age, although the stocked K2 had by far a larger initial TL.\u0000Our results showed that predation can massively impact the mortality rate of stocked K1 juveniles and thus the success of fisheries management strategies. Moreover, it demonstrated the benefits of stocking fish in early life stages regarding a best possible adaptation to the given environmental conditions.","PeriodicalId":23978,"journal":{"name":"Turkish Journal of Fisheries and Aquatic Sciences","volume":" ","pages":""},"PeriodicalIF":1.3,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45883455","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}

{"title":"Can Dietary Hazelnut Oil Inclusion Alleviate the Negative Effects of Oxidized Fish Oil in Rainbow Trout (Oncorhynchus mykiss) Juveniles?","authors":"Şeyda Tacer‐Tanas, M. Arslan","doi":"10.4194/trjfas23350","DOIUrl":"https://doi.org/10.4194/trjfas23350","url":null,"abstract":"Rainbow trout juveniles were fed different levels of fresh fish oil, oxidized fish oil and fresh hazelnut oil for 9 weeks. Growth performance and feed efficiency was significantly influenced by oxidized fish oil (P<0.05), but not by hazelnut oil supplementation and their interaction. Fish fed diets containing fresh fish oil had better growth and feed efficiency than those fed diets containing oxidized fish oil. Digestibility decreased with the increase in both dietary oxidized fish oil and hazelnut oil. Fatty acid profile in whole body lipids was significantly influenced by the experimental diets (P<0.05). Polyunsaturated fatty acids (PUFA) showed significant decrease with both dietary hazelnut oil inclusion and dietary oxidized fish oil. Dietary hazelnut oil resulted in a significant increase in hepatic vitamin E and a significant decrease in lipid peroxidation level (P<0.05). Our overall results suggested that dietary oxidized lipids caused growth depletion, lowered nutrient digestibility, lipid peroxidation, and decreased eicosapentaenoic acid (EPA; 20:5n-3) and docosahexaenoic (DHA; 22:6n-3) levels in rainbow trout. However, dietary hazelnut oil inclusion alleviated the negative effects of oxidized oil, sparing n-3 long-chain PUFAs such as EPA and DHA, and increasing hepatic α-tocopherol level which lowered lipid peroxidation despite no significant impact on growth.","PeriodicalId":23978,"journal":{"name":"Turkish Journal of Fisheries and Aquatic Sciences","volume":" ","pages":""},"PeriodicalIF":1.3,"publicationDate":"2023-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42703223","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}

{"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}

{"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}

{"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}

{"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}

{"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}

{"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}

{"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}

{"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}