Pub Date : 2022-06-15DOI: 10.12714/egejfas.39.2.05
A. Şahin, M. Karatepe
In this study, we aimed to determine the effect of domestic and agricultural discharge on the level of antioxidant vitamins A, E, C, β-carotene and malondialdehyde (MDA, an indicator of oxidative stress) in the muscle tissue of freshwater mussel as known bioindicator (Unio elongatulus eucirrus). The freshwater mussels were collected from Arguvan (uncontaminated reference site) and Battalgazi (exposed to discharge site) in the Karakaya Dam Lake. In order to examine the effect of this discharge on freshwater mussel collected from these two different regions, antioxidant vitamins A, E, C, β carotene and Malondialdehyde (MDA) levels were analyzed using High Performance Liquid Chromatography (HPLC). The comparison between groups from the different localities showed that concentrations of the vitamins A, E, C, β-carotene and MDA were found statistically significant according to between the localities (p<0.05) The results showed that vitamins levels were higher and MDA levels were lower in the reference site.
{"title":"Vitamins A, E, C, β -carotene contents and MDA level of freshwater mussel, (Unio elongatulus eucirrus Bourguignat 1860) in the Karakaya Dam Lake","authors":"A. Şahin, M. Karatepe","doi":"10.12714/egejfas.39.2.05","DOIUrl":"https://doi.org/10.12714/egejfas.39.2.05","url":null,"abstract":"In this study, we aimed to determine the effect of domestic and agricultural discharge on the level of antioxidant vitamins A, E, C, β-carotene and malondialdehyde (MDA, an indicator of oxidative stress) in the muscle tissue of freshwater mussel as known bioindicator (Unio elongatulus eucirrus). The freshwater mussels were collected from Arguvan (uncontaminated reference site) and Battalgazi (exposed to discharge site) in the Karakaya Dam Lake. In order to examine the effect of this discharge on freshwater mussel collected from these two different regions, antioxidant vitamins A, E, C, β carotene and Malondialdehyde (MDA) levels were analyzed using High Performance Liquid Chromatography (HPLC). The comparison between groups from the different localities showed that concentrations of the vitamins A, E, C, β-carotene and MDA were found statistically significant according to between the localities (p<0.05) The results showed that vitamins levels were higher and MDA levels were lower in the reference site.","PeriodicalId":11439,"journal":{"name":"Ege Journal of Fisheries and Aquatic Sciences","volume":"32 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86281816","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 : 2022-06-15DOI: 10.12714/egejfas.39.2.09
Çağlayan Kaplan, M. Erdoğan, F. Erdoğan, Ö. Aktaş, F. Pak
This study was carried out to investigate the effects of increasing levels of propolis addition as a feed additive in seabream (Sparus aurata) diets on the hematological parameters and the fish fatty acids profile. Seabream with an average weight of 12.04 ± 0.01 g were fed 0 (control), by 1.25, 2.5, 5, 10, 20 g/kg (abbreviated with P1.25; P2.5; P5; P10 and P20 respectively) propolis supplemented diets for 10 weeks. The experiment was conducted in three replications by adding 50 fish to 18 polyester tanks of 400 L. The trial groups were fed twice daily (09:00 and 17:00) by hand to satiation with feed containing 45% protein and 17% lipid. Although the propolis supplementation had no effect on seabream saturated fatty acids (SFA) and monounsaturated fatty acids (MUFA), the polyunsaturated fatty acid (PUFA) contents increased significantly after the addition of 10 g/kg propolis. Therefore, the addition of the propolis to feeds significantly affected the total fatty acid composition of fish (p <0.05). As a result, the propolis supplement improved the quality of seabream fatty acid composition. At the end of the experiment, hematological parameters such as RBC (erythrocyte count in red blood cells), HGB (hemoglobin count in blood) and HCT (erythrocyte and hemoglobin count in blood) in blood samples taken from fish were found to be higher in P20 group than the other groups. There was no significant difference between the experimental groups (p > 0.05). The addition of the propolis to their feed did not have any effect on the hematological parameters of seabream. The results obtained showed that the propolis has the potential to use in seabream feeds.
{"title":"The influence of the dietary propolis on the fatty acid profile and the hematological parameters of seabream (Sparus aurata L. 1758)","authors":"Çağlayan Kaplan, M. Erdoğan, F. Erdoğan, Ö. Aktaş, F. Pak","doi":"10.12714/egejfas.39.2.09","DOIUrl":"https://doi.org/10.12714/egejfas.39.2.09","url":null,"abstract":"This study was carried out to investigate the effects of increasing levels of propolis addition as a feed additive in seabream (Sparus aurata) diets on the hematological parameters and the fish fatty acids profile. Seabream with an average weight of 12.04 ± 0.01 g were fed 0 (control), by 1.25, 2.5, 5, 10, 20 g/kg (abbreviated with P1.25; P2.5; P5; P10 and P20 respectively) propolis supplemented diets for 10 weeks. The experiment was conducted in three replications by adding 50 fish to 18 polyester tanks of 400 L. The trial groups were fed twice daily (09:00 and 17:00) by hand to satiation with feed containing 45% protein and 17% lipid. Although the propolis supplementation had no effect on seabream saturated fatty acids (SFA) and monounsaturated fatty acids (MUFA), the polyunsaturated fatty acid (PUFA) contents increased significantly after the addition of 10 g/kg propolis. Therefore, the addition of the propolis to feeds significantly affected the total fatty acid composition of fish (p <0.05). As a result, the propolis supplement improved the quality of seabream fatty acid composition. At the end of the experiment, hematological parameters such as RBC (erythrocyte count in red blood cells), HGB (hemoglobin count in blood) and HCT (erythrocyte and hemoglobin count in blood) in blood samples taken from fish were found to be higher in P20 group than the other groups. There was no significant difference between the experimental groups (p > 0.05). The addition of the propolis to their feed did not have any effect on the hematological parameters of seabream. The results obtained showed that the propolis has the potential to use in seabream feeds.","PeriodicalId":11439,"journal":{"name":"Ege Journal of Fisheries and Aquatic Sciences","volume":"172 2 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78008034","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 : 2022-06-15DOI: 10.12714/egejfas.39.2.11
Hasan Cerim, S. Yapıcı, Ö. Yılmaz
This study presents two anomalies that were found in two wild common sole (Solea solea Linnaeus, 1758) specimens. Specimens were captured with 80 mm stretched mesh size trammel net incidentally (in June 2014 and in December 2015) from Güllük Bay, southwest of Turkey where is one of the important common sole fishery areas. Female common sole specimen has lateral line anomaly. According to observations, the lateral line has unordinary shape – labyrinth like, furcate. Other sample, male specimen, has caudal fin anomaly. The specimen has large body size and hence, it was thought that having no caudal fin did not affect its swimming ability besides activities like feeding. The present study contributes to literature about rare anomalies in wild fish stocks.
{"title":"Lateral line and caudal fin anomalies in common sole (Solea solea Linnaeus, 1758) from southern Aegean Sea","authors":"Hasan Cerim, S. Yapıcı, Ö. Yılmaz","doi":"10.12714/egejfas.39.2.11","DOIUrl":"https://doi.org/10.12714/egejfas.39.2.11","url":null,"abstract":"This study presents two anomalies that were found in two wild common sole (Solea solea Linnaeus, 1758) specimens. Specimens were captured with 80 mm stretched mesh size trammel net incidentally (in June 2014 and in December 2015) from Güllük Bay, southwest of Turkey where is one of the important common sole fishery areas. Female common sole specimen has lateral line anomaly. According to observations, the lateral line has unordinary shape – labyrinth like, furcate. Other sample, male specimen, has caudal fin anomaly. The specimen has large body size and hence, it was thought that having no caudal fin did not affect its swimming ability besides activities like feeding. The present study contributes to literature about rare anomalies in wild fish stocks.","PeriodicalId":11439,"journal":{"name":"Ege Journal of Fisheries and Aquatic Sciences","volume":"29 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84275960","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 : 2022-06-15DOI: 10.12714/egejfas.39.2.07
Dilara Sarıbaş, Nehir Kaymak, Özgül Yahyaoğlu, B. Çıplak
Nonnative cichlids (Coptodon zillii) have established populations in the Köyceğiz and Koca Lakes, located on the west coasts of Mediterranean Turkey. Conflicting species names in these lakes have been reported for many years. We studied samples from current populations of Coptodon in these lakes and the Pecenek canal concerning existing GenBank data. We estimated the possible ancestral population using sequence data in the mitochondrial D-loop segment. Inter and intra-population morphological variations of Coptodon were examined using 25 morphological and six meristic characters. Haplotype analysis revealed three unique haplotypes in three populations of Coptodon, indicating poor genetic diversity. Both maximum likelihood and Bayesian trees showed that these three haplotypes constitute a distinct subclade within the Coptodon zillii clade. This phylogenetic pattern indicates that populations of both lakes were founded by a single invasion of C. zillii and belong to a single species. Consistent with phylogenetic data, the populations of both lakes do not exhibit significant phenotypic divergence, though the Pecenek population is slightly divergent. Intra-population morphological variability may be due to phenotypic plasticity in response to habitat heterogeneity within the lakes.
{"title":"Invasive Coptodon (Perciformes: Cichlidae) in southwest Turkey: Species identification using sequence data","authors":"Dilara Sarıbaş, Nehir Kaymak, Özgül Yahyaoğlu, B. Çıplak","doi":"10.12714/egejfas.39.2.07","DOIUrl":"https://doi.org/10.12714/egejfas.39.2.07","url":null,"abstract":"Nonnative cichlids (Coptodon zillii) have established populations in the Köyceğiz and Koca Lakes, located on the west coasts of Mediterranean Turkey. Conflicting species names in these lakes have been reported for many years. We studied samples from current populations of Coptodon in these lakes and the Pecenek canal concerning existing GenBank data. We estimated the possible ancestral population using sequence data in the mitochondrial D-loop segment. Inter and intra-population morphological variations of Coptodon were examined using 25 morphological and six meristic characters. Haplotype analysis revealed three unique haplotypes in three populations of Coptodon, indicating poor genetic diversity. Both maximum likelihood and Bayesian trees showed that these three haplotypes constitute a distinct subclade within the Coptodon zillii clade. This phylogenetic pattern indicates that populations of both lakes were founded by a single invasion of C. zillii and belong to a single species. Consistent with phylogenetic data, the populations of both lakes do not exhibit significant phenotypic divergence, though the Pecenek population is slightly divergent. Intra-population morphological variability may be due to phenotypic plasticity in response to habitat heterogeneity within the lakes.","PeriodicalId":11439,"journal":{"name":"Ege Journal of Fisheries and Aquatic Sciences","volume":"12 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77090103","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 : 2022-06-15DOI: 10.12714/egejfas.39.2.08
M. Gül
Ghost crabs are common bioindicator species for human disturbance on sandy shores. Ghost crabs often alter their population dynamics under human disturbance. Ghost crabs, further, alter their burrowing behavior under human influence, however, these changes are not well known on the Turkish coast of the Mediterranean Sea. Therefore, burrowing morphology of Ocypode cursor at two sites that differ in the degree of human disturbance was compared. Ghost crabs created smaller, steeper and simpler burrows at the site under higher human disturbance compared to the crabs living at the sites with lower human influence. Further, there was no difference in the ghost crab burrow depth and the frequency of existence of chambers between sites. Moreover, the results of this study revealed that larger crabs preferred higher parts of the beach at both sites, suggesting that this is a common behavior for the populations of O. cursor. Consequently, the results of this study emphasized that O. cursor alter their burrowing morphology and characteristics under human disturbance besides their population demographics; suggesting that studies that focus on the use of ghost crabs for human disturbance should include burrow morphology in their assessments.
{"title":"Variation in burrow morphology of ghost crab Ocypode cursor (Linnaeus, 1758) under human influence","authors":"M. Gül","doi":"10.12714/egejfas.39.2.08","DOIUrl":"https://doi.org/10.12714/egejfas.39.2.08","url":null,"abstract":"Ghost crabs are common bioindicator species for human disturbance on sandy shores. Ghost crabs often alter their population dynamics under human disturbance. Ghost crabs, further, alter their burrowing behavior under human influence, however, these changes are not well known on the Turkish coast of the Mediterranean Sea. Therefore, burrowing morphology of Ocypode cursor at two sites that differ in the degree of human disturbance was compared. Ghost crabs created smaller, steeper and simpler burrows at the site under higher human disturbance compared to the crabs living at the sites with lower human influence. Further, there was no difference in the ghost crab burrow depth and the frequency of existence of chambers between sites. Moreover, the results of this study revealed that larger crabs preferred higher parts of the beach at both sites, suggesting that this is a common behavior for the populations of O. cursor. Consequently, the results of this study emphasized that O. cursor alter their burrowing morphology and characteristics under human disturbance besides their population demographics; suggesting that studies that focus on the use of ghost crabs for human disturbance should include burrow morphology in their assessments.","PeriodicalId":11439,"journal":{"name":"Ege Journal of Fisheries and Aquatic Sciences","volume":"16 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90587617","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 : 2022-06-15DOI: 10.12714/egejfas.39.2.02
Kaan Kumaş, T. Tanrıkul
Bacterial fish pathogens cause significant losses in rainbow trout farms. In fish farms, bacterial pathogens cause threatening diseases which has made it necessary to develop rapid methods for disease diagnosis. Serological techniques which are applied with a small amount of antiserum and sample, are preferred for the rapid diagnosis of fish diseases. In this study, formalin-killed antigens prepared from reference strains of Lactococcus garvieae, Yersinia ruckeri, and Vibrio (Listonella) anguillarum were injected intravenously in consecutive doses to New Zealand rabbits. One week after the last injection, the sera separated to use in the slide agglutination tests. A total of 42 strains were studied, including Y. ruckeri (18 isolates), V. anguillarum (14 isolates), and L. garvieae (7 isolates) and 3 references (ATCC 43305, ATCC 29473, ATCC 49156) strains. Serotype O1 determined the predominant serotype (86%) in V. anguillarum and Y. ruckeri (84%) strains examined by the slide agglutination method. L. garvieae strains did not react against Japanese antisera but positively reacted against Turkish L. garvieae antisera.
{"title":"Diagnosis of bacterial fish diseases and classification of serotypes with slide agglutination method","authors":"Kaan Kumaş, T. Tanrıkul","doi":"10.12714/egejfas.39.2.02","DOIUrl":"https://doi.org/10.12714/egejfas.39.2.02","url":null,"abstract":"Bacterial fish pathogens cause significant losses in rainbow trout farms. In fish farms, bacterial pathogens cause threatening diseases which has made it necessary to develop rapid methods for disease diagnosis. Serological techniques which are applied with a small amount of antiserum and sample, are preferred for the rapid diagnosis of fish diseases. In this study, formalin-killed antigens prepared from reference strains of Lactococcus garvieae, Yersinia ruckeri, and Vibrio (Listonella) anguillarum were injected intravenously in consecutive doses to New Zealand rabbits. One week after the last injection, the sera separated to use in the slide agglutination tests. A total of 42 strains were studied, including Y. ruckeri (18 isolates), V. anguillarum (14 isolates), and L. garvieae (7 isolates) and 3 references (ATCC 43305, ATCC 29473, ATCC 49156) strains. Serotype O1 determined the predominant serotype (86%) in V. anguillarum and Y. ruckeri (84%) strains examined by the slide agglutination method. L. garvieae strains did not react against Japanese antisera but positively reacted against Turkish L. garvieae antisera.","PeriodicalId":11439,"journal":{"name":"Ege Journal of Fisheries and Aquatic Sciences","volume":"5 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73202832","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 : 2022-06-15DOI: 10.12714/egejfas.39.2.03
B. Altay, D. İlhan
This study investigates the age, growth and maturity of false scad (Caranx rhonchus Geoffroy Saint-Hilaire, 1817) in the İzmir Bay, the Central Aegean Sea. The total length of 392 fish varied between 12.8-36.0 cm and their weights were measured as 23.51-455.44 g. Sex ratio was 1:0.8 (F:M). Sagittal otoliths were used for age determination. Fish were between I-V age groups in the bay. The length-weight relationships were calculated as W= 0.0145*L2.8911 for females; W= 0.0168*L2.8425 for males, and W= 0.0132*L2.9259 for all fish. The von Bertalanffy growth parameters were found as L∞= 40.86 cm, K= 0.2181 years-1, to= -1.0584 years for females; L∞= 39.54 cm, K= 0.2156 years-1, to= -0.963 years for males; and L∞= 41.12 cm, K=0.2061 years-1, to= -1.0548 years for all fish, respectively. The growth performance index values (Φ) were 2.532 for females, 2.555 for males, and 2.542 for all fish. The length at first maturity was calculated as 18.53 cm for females, and 18.95 cm for males.
本研究调查了爱琴海中部İzmir湾的假贝壳(Caranx rhonchus Geoffroy Saint-Hilaire, 1817)的年龄、生长和成熟度。392条鱼的总长度在12.8 ~ 36.0 cm之间，体重为23.51 ~ 455.44 g。性别比为1:0.8 (F:M)。矢状耳石用于年龄测定。海湾里的鱼年龄在1 - 5岁之间。雌性的长权关系为W= 0.0145*L2.8911;雄性W= 0.0168*L2.8425，所有鱼类W= 0.0132*L2.9259。von Bertalanffy生长参数为L∞= 40.86 cm, K= 0.2181 year -1，雌性为-1.0584 year;L∞= 39.54 cm, K= 0.2156岁-1，男性为-0.963岁;L∞= 41.12 cm, K=0.2061年-1，至-1.0548年。生长性能指数(Φ)为:雌鱼2.532，雄鱼2.555，全鱼2.542。初熟体长雌性为18.53 cm，雄性为18.95 cm。
{"title":"Age, growth and maturity of false scad Caranx rhonchus in the Central Aegean Sea (Teleostei: Carangidae)","authors":"B. Altay, D. İlhan","doi":"10.12714/egejfas.39.2.03","DOIUrl":"https://doi.org/10.12714/egejfas.39.2.03","url":null,"abstract":"This study investigates the age, growth and maturity of false scad (Caranx rhonchus Geoffroy Saint-Hilaire, 1817) in the İzmir Bay, the Central Aegean Sea. The total length of 392 fish varied between 12.8-36.0 cm and their weights were measured as 23.51-455.44 g. Sex ratio was 1:0.8 (F:M). Sagittal otoliths were used for age determination. Fish were between I-V age groups in the bay. The length-weight relationships were calculated as W= 0.0145*L2.8911 for females; W= 0.0168*L2.8425 for males, and W= 0.0132*L2.9259 for all fish. The von Bertalanffy growth parameters were found as L∞= 40.86 cm, K= 0.2181 years-1, to= -1.0584 years for females; L∞= 39.54 cm, K= 0.2156 years-1, to= -0.963 years for males; and L∞= 41.12 cm, K=0.2061 years-1, to= -1.0548 years for all fish, respectively. The growth performance index values (Φ) were 2.532 for females, 2.555 for males, and 2.542 for all fish. The length at first maturity was calculated as 18.53 cm for females, and 18.95 cm for males.","PeriodicalId":11439,"journal":{"name":"Ege Journal of Fisheries and Aquatic Sciences","volume":"7 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91529488","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 : 2022-06-15DOI: 10.12714/egejfas.39.2.04
M. Şirin, I. B. Daban, A. İşmen, Mukadder Arslan İhsanoğlu
This study presents the first data on benthic marine litter in the Marmara Sea, Turkey. To obtain the data, bottom trawl surveys were conducted at 34 sites between May 2017 and February 2018. The litter items were sampled and sorted following the MEDITS’ relevant instructions. 660 pieces of litter, weighing 434.9 kg, were sampled. The litter density was found to range between 27.5 n/km2 and 661.2 n/km2, averaging 73.9 n/km2, and the obtained items’ weights ranged between 0.03 kg/km2 and 1597.8 kg/km2, averaging 48.7 kg/km2. The plastic group L1 constituted 71.7% of the trawled litter. The highest mean litter density was detected in the Northeastern Marmara Sea in the spring and summer of 2018. The mean benthic litter density was found to be higher than the nearby areas. It was concluded that more effort should be invested in reducing marine pollution.
{"title":"Benthic marine litter in the Marmara Sea, Turkey","authors":"M. Şirin, I. B. Daban, A. İşmen, Mukadder Arslan İhsanoğlu","doi":"10.12714/egejfas.39.2.04","DOIUrl":"https://doi.org/10.12714/egejfas.39.2.04","url":null,"abstract":"This study presents the first data on benthic marine litter in the Marmara Sea, Turkey. To obtain the data, bottom trawl surveys were conducted at 34 sites between May 2017 and February 2018. The litter items were sampled and sorted following the MEDITS’ relevant instructions. 660 pieces of litter, weighing 434.9 kg, were sampled. The litter density was found to range between 27.5 n/km2 and 661.2 n/km2, averaging 73.9 n/km2, and the obtained items’ weights ranged between 0.03 kg/km2 and 1597.8 kg/km2, averaging 48.7 kg/km2. The plastic group L1 constituted 71.7% of the trawled litter. The highest mean litter density was detected in the Northeastern Marmara Sea in the spring and summer of 2018. The mean benthic litter density was found to be higher than the nearby areas. It was concluded that more effort should be invested in reducing marine pollution.","PeriodicalId":11439,"journal":{"name":"Ege Journal of Fisheries and Aquatic Sciences","volume":"13 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81176664","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 : 2022-03-15DOI: 10.12714/egejfas.39.1.03
Alihan Mermer, M. Türk, Z. Tosunoğlu
This study aimed to determine the occupational safety knowledge level of the fishers and the factors affecting it in large-scale (trawl-purse seine) fishing vessels registered in Aegean ports. In the survey study, conducted with the participation of 295 person from both types of fishing, 40% (118) of the participants consisted of fishers working in trawlers and 60% (177) in purse-seiners. The knowledge level of 51.5% of the fishers was insufficient under score 7, while 48.5% of them were found to be sufficient with score 8 or more. It was determined that 40% of the fishers had occupational accidents, and hastiness with 15.5%, carelessness with 14.9% and fatigue with 5.8% followed the first place among the causes of accidents. It has been determined that the accidents occurred not only during the operation, but also at the port operations and during the cruise. As a result, it is considered that awareness and training activities to increase the knowledge level of fishers on occupational health and safety will be the most effective method in reducing the possibility of accidents and getting occupational diseases.
{"title":"Occupational health and safety in large-scale fishing vessels registered in Aegean ports","authors":"Alihan Mermer, M. Türk, Z. Tosunoğlu","doi":"10.12714/egejfas.39.1.03","DOIUrl":"https://doi.org/10.12714/egejfas.39.1.03","url":null,"abstract":"This study aimed to determine the occupational safety knowledge level of the fishers and the factors affecting it in large-scale (trawl-purse seine) fishing vessels registered in Aegean ports. In the survey study, conducted with the participation of 295 person from both types of fishing, 40% (118) of the participants consisted of fishers working in trawlers and 60% (177) in purse-seiners. The knowledge level of 51.5% of the fishers was insufficient under score 7, while 48.5% of them were found to be sufficient with score 8 or more. It was determined that 40% of the fishers had occupational accidents, and hastiness with 15.5%, carelessness with 14.9% and fatigue with 5.8% followed the first place among the causes of accidents. It has been determined that the accidents occurred not only during the operation, but also at the port operations and during the cruise. As a result, it is considered that awareness and training activities to increase the knowledge level of fishers on occupational health and safety will be the most effective method in reducing the possibility of accidents and getting occupational diseases.","PeriodicalId":11439,"journal":{"name":"Ege Journal of Fisheries and Aquatic Sciences","volume":"61 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91290782","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 : 2022-03-15DOI: 10.12714/egejfas.39.1.11
D. Ergüden, H. Kabasakal, Hidayet Kambur
An immature male specimen of Carcharhinus falciformis (Bibron, 1839) was caught by a commercial long-liner off Samandağ coast (Iskenderun Bay, northeastern Levant Sea, Turkey), on 2nd of November, 2021. This record is the fourth observation of this species in Turkey. Monitoring the coastal occurrences of the silky shark throughout its distribution range is critical, where the species is considered as very rare.
{"title":"Occurrence of the silky shark, Carcharhinus falciformis (Bibron, 1839) (Carcharhiniformes: Carcharhinidae), from Iskenderun Bay, northeast Levant Sea","authors":"D. Ergüden, H. Kabasakal, Hidayet Kambur","doi":"10.12714/egejfas.39.1.11","DOIUrl":"https://doi.org/10.12714/egejfas.39.1.11","url":null,"abstract":"An immature male specimen of Carcharhinus falciformis (Bibron, 1839) was caught by a commercial long-liner off Samandağ coast (Iskenderun Bay, northeastern Levant Sea, Turkey), on 2nd of November, 2021. This record is the fourth observation of this species in Turkey. Monitoring the coastal occurrences of the silky shark throughout its distribution range is critical, where the species is considered as very rare.","PeriodicalId":11439,"journal":{"name":"Ege Journal of Fisheries and Aquatic Sciences","volume":"46 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75758098","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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