In this study, the possible effects of overfishing pressure on local Salmonid populations and the critical environmental changes that have occurred in the wild habitats that have been deteriorating since the beginning of the 21st century were investigated in Northeast Anatolia. In the research, methods including quantitative and qualitative impact assessments were used to determine environmental changes and anthropogenic effects. In addition to numerical data, observations of the stream and its surroundings were recorded. As a result, it has been determined that the natural trout populations, distributed in the limited habitats in the middle and upper parts of the studied rivers, have decreased considerably, especially since the number of individuals who have reached breeding age has reduced to a high level. It has been determined that the habitats in localities where the research was conducted have been under great pressure, since the end of the 20th century, due to infrastructure works, urbanization, and illegal fishing. It has been determined that the local trout populations, distributed in the limited habitats in the middle and upper basins of the studied rivers, are quite damaged. The number of individuals that have reached the breeding age has decreased significantly.
{"title":"Effects of environmental deterioration on Northeast Anatolia Trout (Salmo spp.) Populations","authors":"","doi":"10.3153/ar23015","DOIUrl":"https://doi.org/10.3153/ar23015","url":null,"abstract":"In this study, the possible effects of overfishing pressure on local Salmonid populations and the critical environmental changes that have occurred in the wild habitats that have been deteriorating since the beginning of the 21st century were investigated in Northeast Anatolia. In the research, methods including quantitative and qualitative impact assessments were used to determine environmental changes and anthropogenic effects. In addition to numerical data, observations of the stream and its surroundings were recorded. As a result, it has been determined that the natural trout populations, distributed in the limited habitats in the middle and upper parts of the studied rivers, have decreased considerably, especially since the number of individuals who have reached breeding age has reduced to a high level. It has been determined that the habitats in localities where the research was conducted have been under great pressure, since the end of the 20th century, due to infrastructure works, urbanization, and illegal fishing. It has been determined that the local trout populations, distributed in the limited habitats in the middle and upper basins of the studied rivers, are quite damaged. The number of individuals that have reached the breeding age has decreased significantly.","PeriodicalId":13619,"journal":{"name":"International Aquatic Research","volume":"83 1","pages":""},"PeriodicalIF":1.3,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79163912","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 this study, a male specimen of John dory (Zeus faber) with 31.4 cm in total length and 365.43 g in body weight was caught with a trammel net at a depth of 15 m from Fener Island in the province of Fatsa (Ordu, Black Sea). This record is the first verified report suggesting that John dory expanded its distribution in the Mediterranean towards the Geographical Sub-Area 29 (Black Sea).
{"title":"First record of the benthopelagic fish John dory Zeus faber (Linnaeus, 1758) in the Black Sea coasts of Türkiye","authors":"M. Aydın, U. Karadurmuş","doi":"10.3153/ar23016","DOIUrl":"https://doi.org/10.3153/ar23016","url":null,"abstract":"In this study, a male specimen of John dory (Zeus faber) with 31.4 cm in total length and 365.43 g in body weight was caught with a trammel net at a depth of 15 m from Fener Island in the province of Fatsa (Ordu, Black Sea). This record is the first verified report suggesting that John dory expanded its distribution in the Mediterranean towards the Geographical Sub-Area 29 (Black Sea).","PeriodicalId":13619,"journal":{"name":"International Aquatic Research","volume":"3 1","pages":""},"PeriodicalIF":1.3,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74812479","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}
H. Kabasakal, S. Sakınan, L. Lipej, Danijel Ivajnšič
Life history traits of 17 species of sharks occurring in the Sea of Marmara were analysed based on Gower’s distances, Principal Coordinate Analyses, and hierarchical clustering. The analysis shows that the sharks of the Sea of Marmara can ecologically be divided into several clusters. The increasing occurrence of sharks on the Marmara continental shelf, especially in the last few years, suggests that the expected habitat compression due to deoxygenation has begun to take place. This situation, which can be considered as a “habitat trap” for sharks, should be considered as a threat that may lead to shark mortalities due to the intensification of bycatches or even the intentional killing of sharks. Available results are sufficient to predict a disturbing future for sharks of the Sea of Marmara if the factors (deoxygenation, habitat loss, bycatch, etc.) threatening the overall ecosystem do not improve.
{"title":"A preliminary life history traits analysis of sharks in the Sea of Marmara (Türkiye), where deoxygenation and habitat deterioration are raising concerns","authors":"H. Kabasakal, S. Sakınan, L. Lipej, Danijel Ivajnšič","doi":"10.3153/ar23008","DOIUrl":"https://doi.org/10.3153/ar23008","url":null,"abstract":"Life history traits of 17 species of sharks occurring in the Sea of Marmara were analysed based on Gower’s distances, Principal Coordinate Analyses, and hierarchical clustering. The analysis shows that the sharks of the Sea of Marmara can ecologically be divided into several clusters. The increasing occurrence of sharks on the Marmara continental shelf, especially in the last few years, suggests that the expected habitat compression due to deoxygenation has begun to take place. This situation, which can be considered as a “habitat trap” for sharks, should be considered as a threat that may lead to shark mortalities due to the intensification of bycatches or even the intentional killing of sharks. Available results are sufficient to predict a disturbing future for sharks of the Sea of Marmara if the factors (deoxygenation, habitat loss, bycatch, etc.) threatening the overall ecosystem do not improve.","PeriodicalId":13619,"journal":{"name":"International Aquatic Research","volume":"27 1","pages":""},"PeriodicalIF":1.3,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76167494","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 examines the length-weight relationships (LWR) and condition factors (CF) of three farmed fish species: rainbow trout (Oncorhynchus mykiss), brook trout (Salvelinus fontinalis), and brown trout (Salmo trutta). It then compares these findings with existing literature data for their wild counterparts to gain insights into the influence of aquaculture on their growth patterns. Using a simple power function, W=α〖L_T〗^β where W represents the fish's weight, and LT represents the fish's total length, the LWR is determined. The estimated β values indicate positive allometric growth for rainbow and brook trout, whereas brown trout exhibit an isometric growth pattern. The estimated condition factors ranged from 0.992 to 1.442 for rainbow trout, 0.665 to 1.731 for brook trout, and 0.841 to 1.321 for brown trout, with significant differences observed among them (Kruskal-Wallis test, p < 0.05). Compared with literature data from their wild counterparts, notable variations in growth patterns emerge, particularly evident in rainbow and brook trout, possibly illustrating the contrasting effects of aquaculture.
{"title":"Do the length-weight relationships and condition factors of farmed rainbow trout, brook, and brown trout differ from their wild counterparts?","authors":"Ömerhan Dürrani","doi":"10.3153/ar23024","DOIUrl":"https://doi.org/10.3153/ar23024","url":null,"abstract":"This study examines the length-weight relationships (LWR) and condition factors (CF) of three farmed fish species: rainbow trout (Oncorhynchus mykiss), brook trout (Salvelinus fontinalis), and brown trout (Salmo trutta). It then compares these findings with existing literature data for their wild counterparts to gain insights into the influence of aquaculture on their growth patterns. Using a simple power function, W=α〖L_T〗^β where W represents the fish's weight, and LT represents the fish's total length, the LWR is determined. The estimated β values indicate positive allometric growth for rainbow and brook trout, whereas brown trout exhibit an isometric growth pattern. The estimated condition factors ranged from 0.992 to 1.442 for rainbow trout, 0.665 to 1.731 for brook trout, and 0.841 to 1.321 for brown trout, with significant differences observed among them (Kruskal-Wallis test, p < 0.05). Compared with literature data from their wild counterparts, notable variations in growth patterns emerge, particularly evident in rainbow and brook trout, possibly illustrating the contrasting effects of aquaculture.","PeriodicalId":13619,"journal":{"name":"International Aquatic Research","volume":"126 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":"136259496","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}
Rootless duckweed (Wolffia spp.) has the potential high-protein food source for humans. Wolffia is a member of the Lemnaceae family and is the world's smallest spermatophyte, with reduced roots, stems, and leaves. Scientific research on Wolffia species is relatively new, and this species is believed to be rare in Turkey. The phytochemicals and nutritional composition of plants are significantly affected by environmental factors in the natural or cultivated medium. In this study, Wolffia arrhiza was collected and cultured from a local area in Yeşilırmak Delta (Samsun) grown under controlled conditions using different LED lights. The Dumas method was used to determine the amount of crude protein. The protein content, calculated by multiplying the nitrogen (%) content by the standard conversion factor 6.25, was also evaluated by using different conversion factors in the literature. The results showed that rootless duckweed can be successfully grown under artificial lighting conditions with different light spectrums. The protein content of rootless duckweed, which was around 10% in the natural environment, increased considerably under red LED light (41.6% protein). The effect of different lights on protein content of W. arrhiza was observed as red LED > blue LED > purple LED > fluorescent. With its high protein content, environmentally friendly and sustainable production, Wolffia has the potential to quickly take place in the plant-based protein and functional food market as an alternative to traditional crops in the near future.
{"title":"Determination of crude protein content using the Dumas method of rootless duckweed (Wolffia arrhiza) grown under different LED lights","authors":"B. Taş, Faruk Tolga Şengülendi","doi":"10.3153/ar23019","DOIUrl":"https://doi.org/10.3153/ar23019","url":null,"abstract":"Rootless duckweed (Wolffia spp.) has the potential high-protein food source for humans. Wolffia is a member of the Lemnaceae family and is the world's smallest spermatophyte, with reduced roots, stems, and leaves. Scientific research on Wolffia species is relatively new, and this species is believed to be rare in Turkey. The phytochemicals and nutritional composition of plants are significantly affected by environmental factors in the natural or cultivated medium. In this study, Wolffia arrhiza was collected and cultured from a local area in Yeşilırmak Delta (Samsun) grown under controlled conditions using different LED lights. The Dumas method was used to determine the amount of crude protein. The protein content, calculated by multiplying the nitrogen (%) content by the standard conversion factor 6.25, was also evaluated by using different conversion factors in the literature. The results showed that rootless duckweed can be successfully grown under artificial lighting conditions with different light spectrums. The protein content of rootless duckweed, which was around 10% in the natural environment, increased considerably under red LED light (41.6% protein). The effect of different lights on protein content of W. arrhiza was observed as red LED > blue LED > purple LED > fluorescent. With its high protein content, environmentally friendly and sustainable production, Wolffia has the potential to quickly take place in the plant-based protein and functional food market as an alternative to traditional crops in the near future.","PeriodicalId":13619,"journal":{"name":"International Aquatic Research","volume":"53 1","pages":""},"PeriodicalIF":1.3,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83277133","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}
Wastes left over from human food production is commonly used to produce feed for animals, which is an important issue for a rational utilization of food sources globally, and a topic that attracts researcher for the establishment of best food production management. Whey as a side product from cheese production has great potentials in terms of nutritional value for both human food and animal feed production. This study aimed to investigate the possible use of whey (1, 10 and 30%, v/v) as an external carbon source for mixotrophic and heterotrophic cultivation of the cyanobacterium Arthrospira platensis. The highest specific growth rate (µ = 0.2 day-1), protein (3.76 ±0.14 mg/ g cell) and lipid (4.67 ±0.18 mg/g cell) contents were detected in heterotrophic culture while the highest chlorophyll-a (292.39 ±1.31 mg/ g cell) and total carbohydrate (1.42 ±0.07 mg/ g cell) contents were found in mixotrophic culture. In heterotrophic cultivation, it can be noted that the absorbed organic carbon source increased cell counts and triggered especially lipid production. In the mixotrophic cultivation, carbon absorbed from the culture medium or CO2 captured with chlorophyll was utilized in the production of total carbohydrate. This study provides evidence that a cyanobacterium can adapt to heterotrophic conditions without light, creating an example for an economic and ecological production model for biochemical components.
人类食品生产的剩余物通常被用来生产动物饲料，这是全球合理利用食物资源的重要问题，也是建立最佳食品生产管理吸引研究者的课题。乳清作为奶酪生产的副产品，在人类食品和动物饲料生产的营养价值方面具有巨大的潜力。本研究旨在探讨乳清(1、10和30%，v/v)作为混合营养和异养培养蓝藻platarthrospira的外部碳源的可能性。异养培养的特定生长率(µ= 0.2 d -1)、蛋白质(3.76±0.14 mg/g细胞)和脂肪(4.67±0.18 mg/g细胞)含量最高，混合营养培养的叶绿素-a(292.39±1.31 mg/g细胞)和总碳水化合物(1.42±0.07 mg/g细胞)含量最高。在异养培养中，可以注意到吸收的有机碳源增加了细胞计数，特别是引发了脂质产生。在混合营养栽培中，利用从培养基中吸收的碳或叶绿素捕获的二氧化碳生产总碳水化合物。这项研究提供了证据，证明蓝藻可以适应没有光的异养条件，为生化成分的经济和生态生产模式创造了一个例子。
{"title":"Cultivation of Arthrospira platensis in heterotrophic and mixotrophic conditions with different concentrations of whey","authors":"Zülfiye Velioğlu Tosuner, Raziye Öztürk Ürek","doi":"10.3153/ar22014","DOIUrl":"https://doi.org/10.3153/ar22014","url":null,"abstract":"Wastes left over from human food production is commonly used to produce feed for animals, which is an important issue for a rational utilization of food sources globally, and a topic that attracts researcher for the establishment of best food production management. Whey as a side product from cheese production has great potentials in terms of nutritional value for both human food and animal feed production. This study aimed to investigate the possible use of whey (1, 10 and 30%, v/v) as an external carbon source for mixotrophic and heterotrophic cultivation of the cyanobacterium Arthrospira platensis. The highest specific growth rate (µ = 0.2 day-1), protein (3.76 ±0.14 mg/ g cell) and lipid (4.67 ±0.18 mg/g cell) contents were detected in heterotrophic culture while the highest chlorophyll-a (292.39 ±1.31 mg/ g cell) and total carbohydrate (1.42 ±0.07 mg/ g cell) contents were found in mixotrophic culture. In heterotrophic cultivation, it can be noted that the absorbed organic carbon source increased cell counts and triggered especially lipid production. In the mixotrophic cultivation, carbon absorbed from the culture medium or CO2 captured with chlorophyll was utilized in the production of total carbohydrate. This study provides evidence that a cyanobacterium can adapt to heterotrophic conditions without light, creating an example for an economic and ecological production model for biochemical components.","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":"77074683","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}
Jorge I. Rosales-Vásquez, V. Anislado-Tolentino, Andrés Irigoyen-Solis, A. Wakida-Kusunoki, L. F. Del Moral-Flores
Sphyrna gilberti is a large hammerhead shark described off South Carolina and data distribution on other regions of the Western Atlantic are unknown. An adult male with a total length of 240 cm was collected in 2021 on Campeche, Southwestern Gulf of México. The precaudal vertebral count of the examined individual was 89, and a large head and a robust caudal peduncle were observed. This study documents the first record of S. gilberti in Mexican waters.
{"title":"First record of Sphyrna gilberti Quattro et al., 2013, on the coast of Campeche, México","authors":"Jorge I. Rosales-Vásquez, V. Anislado-Tolentino, Andrés Irigoyen-Solis, A. Wakida-Kusunoki, L. F. Del Moral-Flores","doi":"10.3153/ar22024","DOIUrl":"https://doi.org/10.3153/ar22024","url":null,"abstract":"Sphyrna gilberti is a large hammerhead shark described off South Carolina and data distribution on other regions of the Western Atlantic are unknown. An adult male with a total length of 240 cm was collected in 2021 on Campeche, Southwestern Gulf of México. The precaudal vertebral count of the examined individual was 89, and a large head and a robust caudal peduncle were observed. This study documents the first record of S. gilberti in Mexican waters.","PeriodicalId":13619,"journal":{"name":"International Aquatic Research","volume":"45 1","pages":""},"PeriodicalIF":1.3,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84653996","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}
Micropollution is a serious environmental problem caused by continuous entry of trace quantities of toxic chemical substances into the aquatic environment. In the present study, three trophic levels of the aquatic ecosystems were used to evaluate the acute toxicities of environmentally important micropollutants including heavy metals, pesticides and drugs. There is a scarcity of information on toxicity of the studied substances on marine water algae. Among studied micropollutants, the most toxic chemical to Daphnia magna and Danio rerio was found to be 1-Chloro-2,4 dinitrobenzene with EC50 of 0.002 and 4.2 mg/L, respectively. Although this compound was also toxic to marine algae, Phaeodactylum tricornutum, arsenic showed the highest toxicity to the algae with EC50 of 2.4 mg/L. As compared to other organisms, D. magna was found to have higher sensitivity to all of the tested micropollutants.
{"title":"Toxicity of environmentally important micropollutants on three trophic levels","authors":"Hilal Yılmaz, G. Avaz, Ü. Yetiş, M. Özkan","doi":"10.3153/ar22003","DOIUrl":"https://doi.org/10.3153/ar22003","url":null,"abstract":"Micropollution is a serious environmental problem caused by continuous entry of trace quantities of toxic chemical substances into the aquatic environment. In the present study, three trophic levels of the aquatic ecosystems were used to evaluate the acute toxicities of environmentally important micropollutants including heavy metals, pesticides and drugs. There is a scarcity of information on toxicity of the studied substances on marine water algae. Among studied micropollutants, the most toxic chemical to Daphnia magna and Danio rerio was found to be 1-Chloro-2,4 dinitrobenzene with EC50 of 0.002 and 4.2 mg/L, respectively. Although this compound was also toxic to marine algae, Phaeodactylum tricornutum, arsenic showed the highest toxicity to the algae with EC50 of 2.4 mg/L. As compared to other organisms, D. magna was found to have higher sensitivity to all of the tested micropollutants.","PeriodicalId":13619,"journal":{"name":"International Aquatic Research","volume":"47 1","pages":""},"PeriodicalIF":1.3,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75726000","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}
Two specimens of the butterfly blenny, Blennius ocellaris, were caught off the coast of Ordu (Black Sea, Turkey) in April 2021 by trammel net. The aim of this paper is to further document occurrence and distribution of the butterfly blenny for the Black Sea and for Turkish marine ichthyofauna and to provide first morphometric, reproduction, and genetic data on this species to the Black Sea fauna species. Some morphometric and meristic characters were measured and presented as the percentage of total length (TL%). All morphometric measurements except eye diameter, pre-anal length, and maximum body depth were higher in the male individual. It was observed that the head makes up almost 1/4 of the body. It was determined that the ripe eggs were in their final stage of development (Stage IV). Gonad’s weight of a female individual was 2.85 g and the number of eggs was determined as 2993. The mean egg diameter was measured as 1070.7 ±15.63 μm (from 1050.2 to 1123.1 μm). The mitochondrial DNA gene regions of 16S rRNA and COI of the specimens were sequenced and analyzed. The generated partial sequences of COI and 16S rRNA were 621 bp and 551 bp, respectively. The maximum likelihood tree generated with the COI gene sequences retrieved from the GenBank database demonstrated geographic region-based distinction and sequences of the Black Sea specimens nested with the reference specimen sequences from the Western Mediterranean Sea and the Sea of Marmara.
{"title":"First morphometry, reproduction, and genetic data for Blennius ocellaris (Linnaeus, 1758) from the Black Sea","authors":"U. Karadurmuş, R. Öztürk, M. Aydın","doi":"10.3153/ar22006","DOIUrl":"https://doi.org/10.3153/ar22006","url":null,"abstract":"Two specimens of the butterfly blenny, Blennius ocellaris, were caught off the coast of Ordu (Black Sea, Turkey) in April 2021 by trammel net. The aim of this paper is to further document occurrence and distribution of the butterfly blenny for the Black Sea and for Turkish marine ichthyofauna and to provide first morphometric, reproduction, and genetic data on this species to the Black Sea fauna species. Some morphometric and meristic characters were measured and presented as the percentage of total length (TL%). All morphometric measurements except eye diameter, pre-anal length, and maximum body depth were higher in the male individual. It was observed that the head makes up almost 1/4 of the body. It was determined that the ripe eggs were in their final stage of development (Stage IV). Gonad’s weight of a female individual was 2.85 g and the number of eggs was determined as 2993. The mean egg diameter was measured as 1070.7 ±15.63 μm (from 1050.2 to 1123.1 μm). The mitochondrial DNA gene regions of 16S rRNA and COI of the specimens were sequenced and analyzed. The generated partial sequences of COI and 16S rRNA were 621 bp and 551 bp, respectively. The maximum likelihood tree generated with the COI gene sequences retrieved from the GenBank database demonstrated geographic region-based distinction and sequences of the Black Sea specimens nested with the reference specimen sequences from the Western Mediterranean Sea and the Sea of Marmara.","PeriodicalId":13619,"journal":{"name":"International Aquatic Research","volume":"17 1","pages":""},"PeriodicalIF":1.3,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81319393","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}
Deniz Mercan, N. Arslan, Belgin Çamur Elipek, N. Ertorun, D. Odabaşı
In order to evaluate the macrozoobenthic fauna of Çıldır, Aktaş and Aygır lakes, 47 taxa were identified as a result of the samplings carried out in different periods in 2013, 2017 and 2019. 41 of 43 taxa identified at species level were new records for the study area. The dominant species of Lake Çıldır were Gyraulus (Armiger) crista (4.49%), Paratanytarsus lauterborni (3.90%) and Virgotanytarsus arduensis (3.80%). It was seen that the gammarid population was determined dominant among zoobenthos of Aktaş Lake. Gammarus pseudosyriacus was the dominant species with 15.24% dominance rate in Aktaş Lake, followed by Cricotopus (Isocladius) reversus with 7.53% and Gyraulus albus with 7.29%. Gammarid population was also high in Aygır Lake, but unlike Aktaş Lake, Gammarus balcanicus from this group with a dominance rate of 6.28%; it took the fourth place after Gyraulus albus (8%), Virgotanytarsus arduensis (6.92%) and Cricotopus (Isocladius) tricinctus (6.64%). In terms of macrozoobenthic fauna diversity, the highest Shannon and Margalef Index values were found in Lake Çıldır (Shannon Index H': between 1.73-2.23 (average 2.0), Margalef Index: between 1.89-2.06 (average 2.03)) while diversity indices were lower in Aktaş and Aygır lakes. The taxa detected in all three lakes are α and β mesotrophic species, and the high population density can be considered as a sign of the transition from the oligotrophic level to the mesotrophic level, especially for Lake Çıldır.
{"title":"First evaluation of three lakes’ (Çıldır, Aktaş and Aygır) macrozoobentic community structure in Aras River basin (North Eastern Türkiye)","authors":"Deniz Mercan, N. Arslan, Belgin Çamur Elipek, N. Ertorun, D. Odabaşı","doi":"10.3153/ar22030","DOIUrl":"https://doi.org/10.3153/ar22030","url":null,"abstract":"In order to evaluate the macrozoobenthic fauna of Çıldır, Aktaş and Aygır lakes, 47 taxa were identified as a result of the samplings carried out in different periods in 2013, 2017 and 2019. 41 of 43 taxa identified at species level were new records for the study area. The dominant species of Lake Çıldır were Gyraulus (Armiger) crista (4.49%), Paratanytarsus lauterborni (3.90%) and Virgotanytarsus arduensis (3.80%). It was seen that the gammarid population was determined dominant among zoobenthos of Aktaş Lake. Gammarus pseudosyriacus was the dominant species with 15.24% dominance rate in Aktaş Lake, followed by Cricotopus (Isocladius) reversus with 7.53% and Gyraulus albus with 7.29%. Gammarid population was also high in Aygır Lake, but unlike Aktaş Lake, Gammarus balcanicus from this group with a dominance rate of 6.28%; it took the fourth place after Gyraulus albus (8%), Virgotanytarsus arduensis (6.92%) and Cricotopus (Isocladius) tricinctus (6.64%). In terms of macrozoobenthic fauna diversity, the highest Shannon and Margalef Index values were found in Lake Çıldır (Shannon Index H': between 1.73-2.23 (average 2.0), Margalef Index: between 1.89-2.06 (average 2.03)) while diversity indices were lower in Aktaş and Aygır lakes. The taxa detected in all three lakes are α and β mesotrophic species, and the high population density can be considered as a sign of the transition from the oligotrophic level to the mesotrophic level, especially for Lake Çıldır.","PeriodicalId":13619,"journal":{"name":"International Aquatic Research","volume":"246 1","pages":""},"PeriodicalIF":1.3,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74731630","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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