International Aquatic Research最新文献

{"title":"Investigation of fatty acid profiles in some economically important fish species living in Atatürk Dam Lake, Adıyaman, Türkiye","authors":"Y. Yakar, A. Parmaksız, Y. Dörtbudak, N. Doğan","doi":"10.3153/ar23002","DOIUrl":"https://doi.org/10.3153/ar23002","url":null,"abstract":"This study aims to deter-mine the fatty acid profile of 10 fish species (Carassius gibelio (Bloch, 1782), Chondrostoma regi-um (Heckel, 1843), Cyprinus carpio (Linnaeus, 1758), Carassius auratus (Linnae-us, 1758), Alburnus sellal (Heckel, 1843), Planiliza abu (Heckel, 1843), Capoeta trutta (Heckel, 1843), Arabibarbus grypus (Heck-el, 1843), Mastacembelus mastacembelus (Banks & Solander 1794) ) caught from Atatürk Dam Lake, sold by fishermen and con-sumed by local people. Ac-cordingly, the fish species identification was made and the individuals belonging to the determined species were randomly selected and mus-cle tissue was taken from each sample for fatty acid analysis and put into tubes. Extraction of fats from muscle tissue was carried out using a chloroform-methanol solvent mixture. The methylation process of fatty acids was carried out using the TS EN ISO 12966:2 method. Analyzes were performed with Ther-mo brand Trace GC model GC with FID (Flame Ion De-tector) detector. A 60 m HP-88 column was used in the analysis. It has been deter-mined that 10 fish species contain a total of 26 differ-ent fatty acids. Palmitic acid is the major fatty acid among saturated fatty acids (SFA). Palmitic acid values vary between 18.31 % and 25.51 %. It was determined the most in C. carpio and the lowest in C. auratus. Among the mono unsaturat-ed fatty acids (MUFA), ole-ic acid is the major fatty ac-id and was found between 12.70 % and 29.77 %. It was detected at most in A. sellal with a rate of 29.77 % and in P. abu with a minimum rate of 12.70 %. Of the pol-yunsaturated fatty acids (PUFA), docosahexaenoic acid is seen as the major fat-ty acid. It was detected at most in C. trutta with a rate of 14.24 %, and at a mini-mum in C. carpio with a rate of 0.62 %.","PeriodicalId":13619,"journal":{"name":"International Aquatic Research","volume":"10 1","pages":""},"PeriodicalIF":1.3,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85448593","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}

{"title":"Demographic characteristics and exploitation rate of Dormitator lebretonis (Pisces: Eleotridae: Steindachner, 1870) from four coastal lagoons of Southern Benin, West Africa","authors":"P. Sonon, Rachad Sidi Imorou, Nambil Adjibade, Hamidou Arame, A. Adite","doi":"10.3153/ar23010","DOIUrl":"https://doi.org/10.3153/ar23010","url":null,"abstract":"Dormitator lebretonis (Pisces: Eleotridae) is the dominant eleotrid in the Benin coastal waters, where this species constitutes an important fisheries component. The current fisheries survey investigates demographic parameters and the exploitation of D. lebretonis from the Benin coastal waters to contribute to species conservation and sustainable use. Individuals of D. lebretonis have been sampled monthly for 18 months at four locations in the Benin coastal waters. Overall, D. lebretonis showed moderate asymptotic length (L∞) ranging between 11.55-12.08 cm. The growth rate (K) ranged between 0.74yr-1 and 3.1yr-1. The species exhibited moderate longevity ranging between 0.968 and 4.054 years. The growth performance index (φ’) varied between 1.994-2.617, indicating that D. lebretonis is a relatively slow-growing eleotrid. Annual mortalities dominate population growth (Z/K>1), and lengths at first capture (3.80≤L50≤5.05cm) indicated that D. lebretonis was exploited at immature stages. Nevertheless, the exploitation rate (E) was under 0.5, showing the stock was underexploited. The species showed two peaks of recruitment, except in Lake Ahémé. Sustainable exploitation of D. lebretonis in the coastal waters requires a holistic management scheme that should include fisheries regulation enforcement, spawning ground protection, ecosystem restoration, and follow-up.","PeriodicalId":13619,"journal":{"name":"International Aquatic Research","volume":"39 1","pages":""},"PeriodicalIF":1.3,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74833136","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}

{"title":"Assessing eutrophication vulnerability in Köyceğiz Lake: Climate change and basin developments impact trophic status","authors":"Elif Atasoy Aytış, E. Soyer, A. Ertürk","doi":"10.3153/ar23020","DOIUrl":"https://doi.org/10.3153/ar23020","url":null,"abstract":"This study investigated the potential for eutrophication in Köyceğiz Lake, one of Türkiye's most important and sensitive ecosystems. We developed a simple steady-state eutrophication model system using a phosphorus mass balance model for the lake, utilising open-access data from the literature as input. The model was calibrated and validated, with a specific focus on the eutrophic state of Köyceğiz Lake, and it demonstrated good responsiveness to future predictions. Our findings revealed that both the epilimnion (TSI (TP) 56) and hypolimnion (TSI (TP) 70) of Köyceğiz Lake are eutrophic. Considering climate change impacts and developments in the basin, we conducted projections to determine the lake's trophic status between 2035 and 2095. By 2035, a 65% decrease in freshwater inflow and a 4% increase in total TP load will lead to a hypertrophic status, which will persist and gradually worsen to a severe trophic situation by 2095.","PeriodicalId":13619,"journal":{"name":"International Aquatic Research","volume":"135 1","pages":""},"PeriodicalIF":1.3,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88091093","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}

{"title":"Occurrence of Aulopus filamentosus (Bloch, 1792) (Aulopidae) in the Turkish Aegean Sea (Sığacık Bay, E. Mediterranean)","authors":"O. Akyol","doi":"10.3153/ar23021","DOIUrl":"https://doi.org/10.3153/ar23021","url":null,"abstract":"Three specimens of A. filamentosus were captured by recreational anglers off Sığacık Bay, Izmir, at a depth of 220 m on 22 March 2023. The total length of these specimens was between 255 and 310 mm. Thus, the certain record number has reached at least twenty specimens in the Turkish seas. This paper presents the fifth confirmed record of A. filamentosus from the southeastern Aegean Sea. Though the sporadic occurrences of this species in the Aegean Sea do not indicate an established population for the time being, it signs that it is becoming abundant.","PeriodicalId":13619,"journal":{"name":"International Aquatic Research","volume":"1 1","pages":""},"PeriodicalIF":1.3,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91091028","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}

{"title":"Anatomy and histological evaluation of the reproductive system of marine calanoid copepod Centropages furcatus from a mass culture perspective","authors":"M. Asrar Sheriff, Vijayaraj Radha, Kareem Altaff","doi":"10.3153/ar23022","DOIUrl":"https://doi.org/10.3153/ar23022","url":null,"abstract":"Marine finfish culture is a priority area for future human food security. Although many marine finfish species have been domesticated and successful breeding and spawning in captive conditions are achieved, the larval rearing from hatchling to fingerling stage to the desired level is yet to be achieved. One of the essential impediment factors in this process is the availability of suitable live feed for the finfish larvae. The traditional live feeds (Artemia nauplii and rotifers) must be more adequate in size spectrum and nutritive value to many marine finfish larvae. In nature, copepod nauplii, copepodite stages, and adults constitute the preferred food of marine finfish larvae. Copepod size spectrum, nutritive value and swimming movements make them ideal live prey items for fish larvae. Nevertheless, the high-density culture of copepods is challenging due to their sexual reproduction and high species-specific variability. Further, adequate knowledge of the candidate species' food and feeding habits, reproductive biology, and life cycle strategies should exist. With this objective present study describes the female and male reproductive system, oogenesis and spermatogenesis, egg production, and reproductive potential of a candidate calanoid copepod species, Centropages furcatus. This basic information will help develop mass culture protocol for this species.","PeriodicalId":13619,"journal":{"name":"International Aquatic Research","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136259886","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}

{"title":"The first report and a new host record of leech fish, Trachelobdella lubrica (Grube, 1840) infecting the gills of Sparus aurata (Linnaeus, 1758) from the Gulf of Bejaia, Algeria","authors":"Souhila Ramdani","doi":"10.3153/ar23026","DOIUrl":"https://doi.org/10.3153/ar23026","url":null,"abstract":"This study is to be the first report and new host record of segmented worms in the family Piscicolidae, Trachelobdella lubrica parasitizing Sparus aurata off the coasts of Algeria. Sparus aurata constitutes new host record for Trachelobdella lubrica. 05 specimens of Sparus aurata were examined for their leech parasites. A single specimen of leech species was recovered from the gills of Sparus aurata. Typical characters allowed us to classify the leech as Trachelobdella lubrica.","PeriodicalId":13619,"journal":{"name":"International Aquatic Research","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136260028","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}

{"title":"Phytoplankton communities of two floodplain lakes of the Dibru Saikhowa biosphere reserve, Tinsukia, Assam (Northeast India): Ecology, richness, and abundance","authors":"Nogen Noroh, Kensibo Pamai, Mrinal Hatimuria","doi":"10.3153/ar23025","DOIUrl":"https://doi.org/10.3153/ar23025","url":null,"abstract":"Phytoplankton communities of Dibru Saikhowa Biosphere Reserve (DSBR) beels were studied from October 2013 to September 2015 in two floodplain lakes (beels), namely Maghuri beel and No.11 beel in Tinsukia district, upper Assam, Northeast India. Phytoplankton reveal a richness of (61 species) belonging to five groups: Chlorophyta (35 species) > Bacillariophyta (13 species) > Euglenophyta (7 species) > Cyanophyta (5 species) > Dinophyta (1). The monthly phytoplankton richness indicated 13–32 (25 ±6) species) and 21–39 (30 ±5) and with distinct species importance of Chlorophyta (5-17) 12 ±4 and (10-24) 15 ±3 species in Maghuri beel and No.11 beel respectively. Phytoplankton abundance ranged between 162 ±157 n/L and 138 ±39 n/L and comprised a sub-dominant component of net plankton, i.e., between 39.7 ±15.8% and 41.0 ±9.9% in Maghuri beel and No.11 beel respectively. Seventeen abiotic factors recorded relatively limited influence on the phytoplankton richness and abundance of the sampled bells. The canonical correspondence analysis asserted higher cumulative influence along the first two axes of 17 abiotic factors on phytoplankton assemblages of Maghuri beel (76.46%) than in No.11 beel (61.73%) beels.","PeriodicalId":13619,"journal":{"name":"International Aquatic Research","volume":"84 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136260038","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}

{"title":"Mitochondrial DNA sequence analysis of Arabibarbus grypus (Heckel, 1843) living in Great Zab (Erbil, Iraq)","authors":"A. Parmaksız","doi":"10.3153/ar23003","DOIUrl":"https://doi.org/10.3153/ar23003","url":null,"abstract":"Arabibarbus grypus (Heckel, 1843), which naturally lives in the Euphrates and Tigris River systems and is endemic, is an economically important fish species consumed by humans. Since the population of this species, which is hunted by both fishermen and local peo-ple, is decreasing day by day, its genetic characteristics need to be determined. This study aims to determine the genetic characteristics of A. grypus samples living in Great Zab based on sequence analysis of mtDNA cyt b and mtDNA d loop gene regions. Total DNA isolation was performed from muscle tissue using the kit. Then, Polymerase Chain Reac-tion was applied through spe-cific primers to mtDNA cyt b and mtDNA d loop gene re-gions, and the target regions were amplified. The products with the target length were sent to the commercial firm and sequence analysis was per-formed. Regarding these spec-imens living in Great Zab, two haplotypes were determined for the mtDNA cyt b gene re-gion and five haplotypes for the mtDNA d loop gene re-gion. These haplotypes were compared with the haplotypes in the gene bank and the re-sults were evaluated. Some important data has been ob-tained regarding the conserva-tion and management of this fish species. Since three new haplotypes were detected for the d loop region in this stud-ied locality, it is important to include the samples in this lo-cality in conservation studies.","PeriodicalId":13619,"journal":{"name":"International Aquatic Research","volume":"19 1","pages":""},"PeriodicalIF":1.3,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81217915","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}

{"title":"Temporal and spatial variations of pelagic microbial water quality in a coastal river-wetland area in a temperate climate zone","authors":"B. Taş, Halim Topaldemir, F. Ustaoğlu, Z. Kolören","doi":"10.3153/ar23018","DOIUrl":"https://doi.org/10.3153/ar23018","url":null,"abstract":"The introduction of anthropogenic pollutant loads into wetlands rapidly deteriorates water quality. This study was conducted in the Miliç River, a region with intense agricultural activities and coastal wetland characteristics. The Miliç wetland (fluvial wetland) is a receiving environment where the Terme Plain's drainage waters and the scattered settlements' waters are collected before they are poured into the Black Sea. In the study, monthly surface water samples were taken from four different sampling points of the Miliç River in the temperate climate zone, and total coliform, Escherichia coli, and Clostridium perfringens contamination from fecal indicators were investigated. Microbiological analyses were performed using standard methods with membrane filtration. The average colony count of the water samples at different stations in the Miliç River was determined as 2022 CFU/100 mL, 455 CFU/100 mL, and 34 CFU/100 mL for total coliform, E. coli, and C. perfringens, respectively. The highest fecal pollution was recorded during the rainy seasons (winter>autumn>spring>summer). In the correlation between stations and seasons, the highest correlation was determined for E. coli in winter (r= 0.985, p<0.05) and for C. perfringens in autumn (r=0.958, p<0.05). Analysis results show that there is fecal pollution in Miliç coastal wetlands. According to the bacteriological parameters in the Surface Water Quality Regulation, wetland water ranks II in total coliform bacteria count. The class is of water quality (slightly contaminated water). Regarding this parameter, the ecological status of the river-wetland is in the “good” water class. In terms of microbiological water quality, the Miliç River has values that are not very polluted but under the pressure of pollution. In order not to increase the level of fecal contamination, direct mixing of domestic waste/ wastewater, animal manures, industrial wastewater/rainwater channels, and drainage channels from settlements and agricultural areas in the wetland basin should be prevented, and the public should be made aware of the necessary precautions to be taken.","PeriodicalId":13619,"journal":{"name":"International Aquatic Research","volume":"32 5 1","pages":""},"PeriodicalIF":1.3,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78038709","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}

{"title":"An investigation of the maritime accident in the Aegean Sea Turkish search and rescue region","authors":"","doi":"10.3153/ar23009","DOIUrl":"https://doi.org/10.3153/ar23009","url":null,"abstract":"The Aegean Sea is risky for marine accidents due to its geography and dense vessel traffic. Revealing the patterns of marine accidents in the region is essential for preventing such accidents in the future. With this motivation, this study analyzes the data on maritime accidents in the Aegean Sea Turkish Search and Rescue Region. For this purpose, the descriptive analysis of the 576 marine accidents in the region between 2001 and 2020 was accomplished. Moreover, by applying hypothesis tests, the relationships between the factors that affect the occurrence of marine accidents were investigated. As a result, the most common contributing factors to the event of accidents were revealed. The relationships between the variables of the data set were determined. Accordingly, the type of ship with the most accident are yacht/recreational boat. Hull/machinery failure is the most common type of accident, and summer is the most frequent season for maritime accidents. It was revealed that there are significant relationships between the variables such as the type of accident, the sub-region where the accident occurred, the time of the accident, and the ship type. Finally, deficiencies were evaluated, and suggestions were made for more effective investigation and prevention of accidents.","PeriodicalId":13619,"journal":{"name":"International Aquatic Research","volume":"31 1","pages":""},"PeriodicalIF":1.3,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80364540","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}