Pub Date : 2023-06-15DOI: 10.12714/egejfas.40.2.06
Merve Tınkır, A. Yılayaz, Devrim Memiş
The European catfish (Silurus glanis L., 1758) is an important species for the aquaculture sector and the production of quality broodstock in artificial fertilization methods as well. One of the crucial steps determining the success of the reproduction of catfish is to obtain sufficient and good-quality sperm. The aim of this study is to compare two different methods used to obtain sperm from European catfish. The first method is surgery extraction of testicular sperm from taking testicles (CS) and the second method collection of sperm by stripping (SS). The fertilization rate was calculated as a percent for CS and SS groups and the highest fertilization rate was found in the SS group (81.87 ± 17.38%). According to the findings in the present study, it was concluded that it is not necessary to kill male European catfish to get sperm for fertilization.
{"title":"Two different methods of sperm collection in European catfish (Silurus glanis Linnaeus, 1758)","authors":"Merve Tınkır, A. Yılayaz, Devrim Memiş","doi":"10.12714/egejfas.40.2.06","DOIUrl":"https://doi.org/10.12714/egejfas.40.2.06","url":null,"abstract":"The European catfish (Silurus glanis L., 1758) is an important species for the aquaculture sector and the production of quality broodstock in artificial fertilization methods as well. One of the crucial steps determining the success of the reproduction of catfish is to obtain sufficient and good-quality sperm. The aim of this study is to compare two different methods used to obtain sperm from European catfish. The first method is surgery extraction of testicular sperm from taking testicles (CS) and the second method collection of sperm by stripping (SS). The fertilization rate was calculated as a percent for CS and SS groups and the highest fertilization rate was found in the SS group (81.87 ± 17.38%). According to the findings in the present study, it was concluded that it is not necessary to kill male European catfish to get sperm for fertilization.","PeriodicalId":11439,"journal":{"name":"Ege Journal of Fisheries and Aquatic Sciences","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78737560","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}
Pub Date : 2023-06-15DOI: 10.12714/egejfas.40.2.08
Okan Ertosluk, O. Akyol, Tevfik Ceyhan, Aytaç Özgül
This study aims to reveal the by-catch rates for gillnet fishery, targeted Boops boops by small-scale fisheries around fish farms in Güllük Bay (Aegean Sea), and to determine the by-catch per unit effort (BPUE) rates. The study was carried out through deck sampling at Göltürkbükü, Gündoğan, Yalıkavak, and Torba fishing ports during two seasons between November and April (2017-2018 / 2018-2019). A total of 147 fishing operations from 13 boats were randomly monitored. In gillnet fishing for bogue, a total of 18163 kg of the catch was caught from 48 species belonging to 30 families, including invertebrates. The target Boops boops was the most common species with a rate of 91.9%, of which 8.1% was determined as a by-catch. The most caught by-catch species are Diplodus annularis (Linnaeus, 1758), Scomber colias (Gmelin, 1789), Trachurus trachurus (Linnaeus, 1758), Pagellus acarne (Risso, 1827), Scomber scombrus (Linnaeus, 1758). While the average BPUE was 4.77 ± 0.85 kg.1000 m-1 in 2018, it was 3.20 ± 0.58 kg.1000 m-1 in 2019. November gives the highest average in terms of BPUE values. The average BPUE ranged from 0 to 19.1 kg.1000 m-1 (mean: 7.97 ± 2.83 kg.1000 m-1). Statistically, there is a significant difference in BPUE values between the months (Kruskal-Wallis test, p < 0.05).
{"title":"By-catch ratios from the bogue (Boops boops) gillnet fishery around the sea-cage fish farms in Güllük Bay (Aegean Sea)","authors":"Okan Ertosluk, O. Akyol, Tevfik Ceyhan, Aytaç Özgül","doi":"10.12714/egejfas.40.2.08","DOIUrl":"https://doi.org/10.12714/egejfas.40.2.08","url":null,"abstract":"This study aims to reveal the by-catch rates for gillnet fishery, targeted Boops boops by small-scale fisheries around fish farms in Güllük Bay (Aegean Sea), and to determine the by-catch per unit effort (BPUE) rates. The study was carried out through deck sampling at Göltürkbükü, Gündoğan, Yalıkavak, and Torba fishing ports during two seasons between November and April (2017-2018 / 2018-2019). A total of 147 fishing operations from 13 boats were randomly monitored. In gillnet fishing for bogue, a total of 18163 kg of the catch was caught from 48 species belonging to 30 families, including invertebrates. The target Boops boops was the most common species with a rate of 91.9%, of which 8.1% was determined as a by-catch. The most caught by-catch species are Diplodus annularis (Linnaeus, 1758), Scomber colias (Gmelin, 1789), Trachurus trachurus (Linnaeus, 1758), Pagellus acarne (Risso, 1827), Scomber scombrus (Linnaeus, 1758). While the average BPUE was 4.77 ± 0.85 kg.1000 m-1 in 2018, it was 3.20 ± 0.58 kg.1000 m-1 in 2019. November gives the highest average in terms of BPUE values. The average BPUE ranged from 0 to 19.1 kg.1000 m-1 (mean: 7.97 ± 2.83 kg.1000 m-1). Statistically, there is a significant difference in BPUE values between the months (Kruskal-Wallis test, p < 0.05).","PeriodicalId":11439,"journal":{"name":"Ege Journal of Fisheries and Aquatic Sciences","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89593686","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}
Pub Date : 2023-06-15DOI: 10.12714/egejfas.40.2.07
K. Öksüz, H. Şereflişan
In this study, the shell structure of the freshwater mussel Anodonta anatina (Linnaeus, 1758) which has a widespread population in Gölbaşı Lake (Hatay) and is not economically exploited, was microscopically examined at a morphological level. It was determined that the shells of Anodonta anatina, which are not under significant fishing pressure, are mostly found discarded along the shores of the lake. This mussel species is important as a composite biological material with multifunctional roles in freshwater ecology. Considering the potential use of freshwater mussel shells as a biological material, an assessment of the shell structure, physical properties, mechanical strength, shell microstructure, and morphological characteristics of A. anatina was conducted. When cross-sections of the shell taken from the umbo, middle periostracum, and the region close to the pallial edge were examined in the dorsal-ventral direction, it was determined that the periostracum layer in the umbo region had a more prismatic and polygonal structure. The interior of the shell was found to consist of a shiny nacreous layer. In nacreous shell sections, it was observed that the nacreous layer contained more distinct layers near the pallial edge. Vickers microhardness tests were performed on individual shells, and it was found that the hardness value of the inner layer was the highest (625.5 ±172.7 HV), while the outer layer had a lower hardness value (531.5 ±110.7 HV). Based on XRF data, it was shown that the seashell powder is mainly composed of calcium oxide (98.8% wt., CaO) as a biological material.
{"title":"Investigation of the structure and hardness properties of Anodonta anatina mussel shells","authors":"K. Öksüz, H. Şereflişan","doi":"10.12714/egejfas.40.2.07","DOIUrl":"https://doi.org/10.12714/egejfas.40.2.07","url":null,"abstract":"In this study, the shell structure of the freshwater mussel Anodonta anatina (Linnaeus, 1758) which has a widespread population in Gölbaşı Lake (Hatay) and is not economically exploited, was microscopically examined at a morphological level. It was determined that the shells of Anodonta anatina, which are not under significant fishing pressure, are mostly found discarded along the shores of the lake. This mussel species is important as a composite biological material with multifunctional roles in freshwater ecology. Considering the potential use of freshwater mussel shells as a biological material, an assessment of the shell structure, physical properties, mechanical strength, shell microstructure, and morphological characteristics of A. anatina was conducted. When cross-sections of the shell taken from the umbo, middle periostracum, and the region close to the pallial edge were examined in the dorsal-ventral direction, it was determined that the periostracum layer in the umbo region had a more prismatic and polygonal structure. The interior of the shell was found to consist of a shiny nacreous layer. In nacreous shell sections, it was observed that the nacreous layer contained more distinct layers near the pallial edge. Vickers microhardness tests were performed on individual shells, and it was found that the hardness value of the inner layer was the highest (625.5 ±172.7 HV), while the outer layer had a lower hardness value (531.5 ±110.7 HV). Based on XRF data, it was shown that the seashell powder is mainly composed of calcium oxide (98.8% wt., CaO) as a biological material.","PeriodicalId":11439,"journal":{"name":"Ege Journal of Fisheries and Aquatic Sciences","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86007946","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}
Pub Date : 2023-06-15DOI: 10.12714/egejfas.40.2.09
Emine Aşık Canbaz, Bilgenur Üçgül, A. C. Seydim
One of the marketing options for European sardine (Sardina pilchardus), which consumers demand nutritional value and taste, is processing in brine that provides a longer shelf life. However, the slow rate of salt diffusion is the biggest obstacle to be overcome. In this context, the pulsed electric field method (PEF) is considered an innovative method that accelerates mass transfer. This study applied PEF to sardine before and while they were kept in brine. The salt concentration of the final product was found to be higher than the control group, which was not applied PEF (p<0.05). However, the difference between the PEF applied samples was insignificant while ash content increased, and water activity value decreased in all samples due to salt absorption. When pH values were compared, no significant difference was observed between samples and storage periods. According to the scanning electron microscope (SEM) images, the number and diameter of the pores increased due to the rise in application time. Therefore, it was concluded that PEF application could be considered a pretreatment to increase salt diffusion in European sardine.
{"title":"Effect of the pulsed electric field method on salt transfer in European sardine (Sardina pilchardus Walbaum, 1792)","authors":"Emine Aşık Canbaz, Bilgenur Üçgül, A. C. Seydim","doi":"10.12714/egejfas.40.2.09","DOIUrl":"https://doi.org/10.12714/egejfas.40.2.09","url":null,"abstract":"One of the marketing options for European sardine (Sardina pilchardus), which consumers demand nutritional value and taste, is processing in brine that provides a longer shelf life. However, the slow rate of salt diffusion is the biggest obstacle to be overcome. In this context, the pulsed electric field method (PEF) is considered an innovative method that accelerates mass transfer. This study applied PEF to sardine before and while they were kept in brine. The salt concentration of the final product was found to be higher than the control group, which was not applied PEF (p<0.05). However, the difference between the PEF applied samples was insignificant while ash content increased, and water activity value decreased in all samples due to salt absorption. When pH values were compared, no significant difference was observed between samples and storage periods. According to the scanning electron microscope (SEM) images, the number and diameter of the pores increased due to the rise in application time. Therefore, it was concluded that PEF application could be considered a pretreatment to increase salt diffusion in European sardine.","PeriodicalId":11439,"journal":{"name":"Ege Journal of Fisheries and Aquatic Sciences","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73950085","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}
Pub Date : 2023-06-15DOI: 10.12714/egejfas.40.2.10
Senem Önen Tarantini
In this study, the new record of the non-indigenous Rhodophyta Antithamnionella spirographidis (Schiffner) Wollaston (1968) has been reported from the Marmara Sea that the connection area between the Mediterranean Sea and the Black Sea. The species, originally described from Trieste (Northern Adriatic Sea), is currently known throughout the Central and Western Mediterranean Sea. Our finding is the easternmost record of this tiny filamentous alga in the Mediterranean Sea.
{"title":"New record for the algal flora of Türkiye: Antithamnionella spirographidis (Schiffner) E.M.Wollaston, 1968 (Ceramiales, Ceramiaceae)","authors":"Senem Önen Tarantini","doi":"10.12714/egejfas.40.2.10","DOIUrl":"https://doi.org/10.12714/egejfas.40.2.10","url":null,"abstract":"In this study, the new record of the non-indigenous Rhodophyta Antithamnionella spirographidis (Schiffner) Wollaston (1968) has been reported from the Marmara Sea that the connection area between the Mediterranean Sea and the Black Sea. The species, originally described from Trieste (Northern Adriatic Sea), is currently known throughout the Central and Western Mediterranean Sea. Our finding is the easternmost record of this tiny filamentous alga in the Mediterranean Sea.","PeriodicalId":11439,"journal":{"name":"Ege Journal of Fisheries and Aquatic Sciences","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75670704","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}
Pub Date : 2023-06-15DOI: 10.12714/egejfas.40.2.02
S. Benzer, R. Benzer
In this study, the growth parameters of big-scale sand smelt (Atherina boyeri Risso, 1810) in İznik Lake has been determined with traditional (length weight relationships (LWRs), von Bertalanffy (VB), condition factor (CF)) and modern approaches (Artificial Neural Networks - ANNs). A total of 635 specimens (44.84% female and 55.16% male) were collected from the local fisherman during the hunting season between April 2018 to April 2019. Mean fork length (FL) (mm, min-max), mean W (g, min-max) and mean CF (value, min-max) were estimated as 67.31 mm (40.10 - 97.77 mm), 2.57g (0.53 - 7.50 g), and 0.790 (0.170-1.520) for all individuals. The length-weight relationships were determined W=0.00001437L2.8602 for female, W=0.00001570L2.8266 for male and W=0.00001328L2.8717 for all individuals. The von Bertalanffy equations were determined Lt=136.218 [1-e(-0.240(t+0.51))] for female, Lt=155.042 [1-e(-0.185(t+0.73))] for male, and Lt=146.916 [1-e(-0.205(t+0.64))] for all individuals. The values in training (MSE (Mean Squared Error) 4.52559e-5, R (correlation coefficients) 9.09347e-1), verification (MSE 4.86111e-5, R 9.00931e-1) and test data (MSE 3.391999e-5, R 9.43465e-1) were found in calculations made with ANNs. It was determined that ANNs could be an alternative for evaluating growth estimation.
{"title":"Growth parameters with traditional and artificial neural networks methods of big-scale sand smelt (Atherina boyeri Risso, 1810)","authors":"S. Benzer, R. Benzer","doi":"10.12714/egejfas.40.2.02","DOIUrl":"https://doi.org/10.12714/egejfas.40.2.02","url":null,"abstract":"In this study, the growth parameters of big-scale sand smelt (Atherina boyeri Risso, 1810) in İznik Lake has been determined with traditional (length weight relationships (LWRs), von Bertalanffy (VB), condition factor (CF)) and modern approaches (Artificial Neural Networks - ANNs). A total of 635 specimens (44.84% female and 55.16% male) were collected from the local fisherman during the hunting season between April 2018 to April 2019. Mean fork length (FL) (mm, min-max), mean W (g, min-max) and mean CF (value, min-max) were estimated as 67.31 mm (40.10 - 97.77 mm), 2.57g (0.53 - 7.50 g), and 0.790 (0.170-1.520) for all individuals. The length-weight relationships were determined W=0.00001437L2.8602 for female, W=0.00001570L2.8266 for male and W=0.00001328L2.8717 for all individuals. The von Bertalanffy equations were determined Lt=136.218 [1-e(-0.240(t+0.51))] for female, Lt=155.042 [1-e(-0.185(t+0.73))] for male, and Lt=146.916 [1-e(-0.205(t+0.64))] for all individuals. The values in training (MSE (Mean Squared Error) 4.52559e-5, R (correlation coefficients) 9.09347e-1), verification (MSE 4.86111e-5, R 9.00931e-1) and test data (MSE 3.391999e-5, R 9.43465e-1) were found in calculations made with ANNs. It was determined that ANNs could be an alternative for evaluating growth estimation.","PeriodicalId":11439,"journal":{"name":"Ege Journal of Fisheries and Aquatic Sciences","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77678773","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}
Pub Date : 2023-06-15DOI: 10.12714/egejfas.40.2.04
Koray Cabbar, C. C. Yığın
This study investigated the feeding habits of Raja miraletus Linnaeus, 1758 and Dipturus oxyrinchus (Linnaeus, 1758). For the purpose of this study, the specimens were obtained monthly from the commercial trawlers operating around the Gökçeada Island in the Northern Aegean Sea between February 2019 and February 2020. A total of 29 (24 female and 5 male) brown rays (Raja miraletus) and 36 (20 female and 16 male) longnosed skates (Dipturus oxyrinchus) were captured. The total lengths of the R. miraletus specimens ranged between 24.0 cm and 53.9 cm, while the D. oxyrinchus specimens measured between 17.1 cm and 85.0 cm. Total length-weight relationships of R. miraletus and D. oxyrinchus specimens, respectively; W=0.0002TL3.92 (R2=0.97) and W=0.0007TL3.43 (R2=0.97) were calculated. The analysis of the stomach content of the specimens showed that crustacea were the primary and the most important prey group for R. miraletus (IRI% = 67.09), followed by teleosts (IRI% = 1.00) and cephalopods (IRI% = 0.45). The D. oxyrinchus specimens were determined to primarily feed on crustacea (IRI% = 74.3), followed by teleosts (IRI% = 6.50) and nematoda (IRI% = 0.40).
{"title":"Feeding habits of two skate species, Raja miraletus Linnaeus, 1758 and Dipturus oxyrinchus (Linnaeus, 1758) (Chondrichthyes, Rajidae), around the Gökçeada Island (Northern Aegean Sea)","authors":"Koray Cabbar, C. C. Yığın","doi":"10.12714/egejfas.40.2.04","DOIUrl":"https://doi.org/10.12714/egejfas.40.2.04","url":null,"abstract":"This study investigated the feeding habits of Raja miraletus Linnaeus, 1758 and Dipturus oxyrinchus (Linnaeus, 1758). For the purpose of this study, the specimens were obtained monthly from the commercial trawlers operating around the Gökçeada Island in the Northern Aegean Sea between February 2019 and February 2020. A total of 29 (24 female and 5 male) brown rays (Raja miraletus) and 36 (20 female and 16 male) longnosed skates (Dipturus oxyrinchus) were captured. The total lengths of the R. miraletus specimens ranged between 24.0 cm and 53.9 cm, while the D. oxyrinchus specimens measured between 17.1 cm and 85.0 cm. Total length-weight relationships of R. miraletus and D. oxyrinchus specimens, respectively; W=0.0002TL3.92 (R2=0.97) and W=0.0007TL3.43 (R2=0.97) were calculated. The analysis of the stomach content of the specimens showed that crustacea were the primary and the most important prey group for R. miraletus (IRI% = 67.09), followed by teleosts (IRI% = 1.00) and cephalopods (IRI% = 0.45). The D. oxyrinchus specimens were determined to primarily feed on crustacea (IRI% = 74.3), followed by teleosts (IRI% = 6.50) and nematoda (IRI% = 0.40).","PeriodicalId":11439,"journal":{"name":"Ege Journal of Fisheries and Aquatic Sciences","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83516498","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}
Pub Date : 2023-06-15DOI: 10.12714/egejfas.40.2.05
E. Ulutürk, M. Kaya
The growth and feeding features of Lepidorhombus boscii (Risso, 1810) (four-spotted megrim) obtained from the Aegean Sea between May 2009 and April 2010 were determined. During the study, 1864 specimens were examined, and the female/male ratio was 1:0.41. The total length range and age distribution for all specimens were 6.3-34.8 cm and I-XIV, respectively. The Von-Bertalanffy growth equations were calculated by using the mean total lengths of each age group. The results were as follows: (L∞= 43.24 cm, K=0.088, t0= -2.897) for females, (L∞= 28.53 cm; K= 0,.25; t0= - 0.829) for males, and (L∞= 42.9 cm, K=0.097, t0= -2.070) for all specimens. The stomach contents of the L. boscii species were also examined; a total of 9 main groups (Amphipoda, Mysidacea, Natantia, Anomura, Brachyura, Stomatopoda, Cephalopoda, Teleostei, Decapod Crustacea) were determined.
对2009年5月至2010年4月在爱琴海捕获的boscii Lepidorhombus (Risso, 1810)(四斑megrim)的生长和摄食特征进行了测定。共检测标本1864只，雌雄比例为1:0.41。所有标本的总长度范围为6.3 ~ 34.8 cm，年龄分布为i ~ xiv。Von-Bertalanffy生长方程通过使用每个年龄组的平均总长度来计算。结果表明:雌性(L∞= 43.24 cm, K=0.088, t0= -2.897)， (L∞= 28.53 cm;或25 K = 0;t0= - 0.829)， L∞= 42.9 cm, K=0.097, t0= -2.070)。同时还检测了猪乳杆菌的胃内容物;共鉴定出9个主要类群(Amphipoda、mysidae、Natantia、Anomura、Brachyura、口足目、头足目、Teleostei、Decapod甲壳目)。
{"title":"Growth and feeding features of the four-spotted megrim Lepidorhombus boscii (Risso,1810) in the Aegean Sea, Türkiye","authors":"E. Ulutürk, M. Kaya","doi":"10.12714/egejfas.40.2.05","DOIUrl":"https://doi.org/10.12714/egejfas.40.2.05","url":null,"abstract":"The growth and feeding features of Lepidorhombus boscii (Risso, 1810) (four-spotted megrim) obtained from the Aegean Sea between May 2009 and April 2010 were determined. During the study, 1864 specimens were examined, and the female/male ratio was 1:0.41. The total length range and age distribution for all specimens were 6.3-34.8 cm and I-XIV, respectively. The Von-Bertalanffy growth equations were calculated by using the mean total lengths of each age group. The results were as follows: (L∞= 43.24 cm, K=0.088, t0= -2.897) for females, (L∞= 28.53 cm; K= 0,.25; t0= - 0.829) for males, and (L∞= 42.9 cm, K=0.097, t0= -2.070) for all specimens. The stomach contents of the L. boscii species were also examined; a total of 9 main groups (Amphipoda, Mysidacea, Natantia, Anomura, Brachyura, Stomatopoda, Cephalopoda, Teleostei, Decapod Crustacea) were determined.","PeriodicalId":11439,"journal":{"name":"Ege Journal of Fisheries and Aquatic Sciences","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73935779","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}
Pub Date : 2023-06-15DOI: 10.12714/egejfas.40.2.03
S. Acar, A. Ateş, E. Dağlı, A. Doğan
This study is on the relationships between the abundances, of cnidarians and echinoderms found in Çardak Lagoon and environmental variables. The benthos samples were collected in three replicates in October 2018, February, April, and June 2019, using a metal framed quadrat system of 100 x 100 cm and 393 cm3 sediment core by a SCUBA diver. Sediment material was collected at 7 sampling points of Çardak Lagoon in Çanakkale Strait. A total of 259 individuals belonging to phylum, Cnidaria and Echinodermata were found in the study area. Cnidarian, Actinia sp. and echinoderm, Asterina gibbosa were the most dominant species. The highest positive correlation value was between Cnidaria species number and organic matter (OM%) content in the sediment. The highest negative correlation value was between Echinodermata species number and NO2+NO3 in lagoon system.
本研究是关于在Çardak泻湖发现的刺胞动物和棘皮动物的丰度与环境变量之间的关系。在2018年10月、2019年2月、4月和6月分三次重复收集底栖动物样本，由一名SCUBA潜水员使用100 x 100 cm和393 cm3沉积物岩心的金属框架样方系统。在Çanakkale海峡Çardak泻湖7个采样点采集沉积物。研究区共发现刺胞门、棘皮门259只。刺胞动物、Actinia sp.和棘皮动物、Asterina gibbosa为优势种。刺胞菌种类数与沉积物有机质(OM%)含量的正相关值最高。泻湖系统中棘皮动物种类数量与NO2+NO3负相关值最高。
{"title":"Relationships between environmental variables and abundance of Cnidaria and Echinodermata in Çardak Lagoon, Çanakkale Strait","authors":"S. Acar, A. Ateş, E. Dağlı, A. Doğan","doi":"10.12714/egejfas.40.2.03","DOIUrl":"https://doi.org/10.12714/egejfas.40.2.03","url":null,"abstract":"This study is on the relationships between the abundances, of cnidarians and echinoderms found in Çardak Lagoon and environmental variables. The benthos samples were collected in three replicates in October 2018, February, April, and June 2019, using a metal framed quadrat system of 100 x 100 cm and 393 cm3 sediment core by a SCUBA diver. Sediment material was collected at 7 sampling points of Çardak Lagoon in Çanakkale Strait. A total of 259 individuals belonging to phylum, Cnidaria and Echinodermata were found in the study area. Cnidarian, Actinia sp. and echinoderm, Asterina gibbosa were the most dominant species. The highest positive correlation value was between Cnidaria species number and organic matter (OM%) content in the sediment. The highest negative correlation value was between Echinodermata species number and NO2+NO3 in lagoon system.","PeriodicalId":11439,"journal":{"name":"Ege Journal of Fisheries and Aquatic Sciences","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91299702","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}
Pub Date : 2023-06-15DOI: 10.12714/egejfas.40.2.01
Ruhay Aldık, Fikret Çakır, Özlem Tonguç Yayıntaş
This study was based on the molecular identification of endoparasites sampled from three economically valuable fish species caught from the waters of the Canakkale (Türkiye). Subjected samples in the study were from chub mackerel (Scomber japonicus Houttuyn, 1782), anchovy (Engraulis encrasicolus Linnaeus, 1758), and bogue (Boops boops Linnaeus, 1758) without gender discrimination. The nematode parasites obtained from the samples were sent to molecular diagnostic laboratories in alcohol and the results were interpreted. As a result of the study, Anisakis typica (Diesing, 1860) Baylis, 1920 and Anisakis pegreffii Campana-Rouget and Biocca, 1955 were isolated from the chub mackerel fish and Anisakis pegreffii species were also isolated from anchovy and bogue. This parasite was the most isolated nematode parasite among all nematodes.
{"title":"Molecular investigation of nematodes isolated from three economical fish species taken from Çanakkale (Türkiye) fish market","authors":"Ruhay Aldık, Fikret Çakır, Özlem Tonguç Yayıntaş","doi":"10.12714/egejfas.40.2.01","DOIUrl":"https://doi.org/10.12714/egejfas.40.2.01","url":null,"abstract":"This study was based on the molecular identification of endoparasites sampled from three economically valuable fish species caught from the waters of the Canakkale (Türkiye). Subjected samples in the study were from chub mackerel (Scomber japonicus Houttuyn, 1782), anchovy (Engraulis encrasicolus Linnaeus, 1758), and bogue (Boops boops Linnaeus, 1758) without gender discrimination. The nematode parasites obtained from the samples were sent to molecular diagnostic laboratories in alcohol and the results were interpreted. As a result of the study, Anisakis typica (Diesing, 1860) Baylis, 1920 and Anisakis pegreffii Campana-Rouget and Biocca, 1955 were isolated from the chub mackerel fish and Anisakis pegreffii species were also isolated from anchovy and bogue. This parasite was the most isolated nematode parasite among all nematodes.","PeriodicalId":11439,"journal":{"name":"Ege Journal of Fisheries and Aquatic Sciences","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86157051","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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