Pub Date : 2021-06-19DOI: 10.29329/actanatsci.2021.314.12
Mısra Bakan, B. Peksezer, N. S. Börekçi, M. Alp, D. Ayas, Mersin Univeristy
Total fat and fatty acid levels of Ulva linza (Linnaeus 1753), Enteromorpha flexuosa (Agardh, 1883), and Taonia atomaria (Agardh, 1848) collected from Viransehir, Taskiran, and Karaduvar coasts were determined. The total oil level of the samples was found to be 1.31-1.91%, 1.23%, 7.78% for U. linza, E. flexuosa and T. atomaria, respectively. The dominant saturated fatty acids are palmitic acid and stearic acid. The highest level of palmitic acid (32.27%) was found in E. flexuosa in Viransehir beach. The highest level of stearic acid was found on the coast of Viransehir (7.20%), U. linza. The highest level of ΣSFA was found in the U. linza species on Taskiran coast (37.89%), and the lowest level was determined in the T. atomaria species on the Taskiran coast (18.13%). It is oleic acid that has a high level of monounsaturated fatty acids. The highest level of this fatty acid (10.35%) was found in E. flexuosa species in Viransehir beach. The highest level of ΣMUFA was found in the Viransehir coast (16.67%) and the lowest level (11.39%) in the U. linza on the Viransehir beach. The highest level of linolelaidic acid in polyunsaturated fatty acids was found in E. flexuosa in Viransehir beach (3.34%). The highest level of linoleic acid (4.85%) was found in U. linza on the coast of Viransehir. The highest level of ΣPUFA was found in T. atomaria on the Taskiran coast (16.56%), and the lowest level (7.03%) was found in U. linza.
{"title":"Effect of Regional Differences on Fatty Acid Profiles of Ulva linza (Linnaeus 1753), Enteromorpha flexuosa (Agardh, 1883) and Taonia atomaria (Agardh, 1848)","authors":"Mısra Bakan, B. Peksezer, N. S. Börekçi, M. Alp, D. Ayas, Mersin Univeristy","doi":"10.29329/actanatsci.2021.314.12","DOIUrl":"https://doi.org/10.29329/actanatsci.2021.314.12","url":null,"abstract":"Total fat and fatty acid levels of Ulva linza (Linnaeus 1753), Enteromorpha flexuosa (Agardh, 1883), and Taonia atomaria (Agardh, 1848) collected from Viransehir, Taskiran, and Karaduvar coasts were determined. The total oil level of the samples was found to be 1.31-1.91%, 1.23%, 7.78% for U. linza, E. flexuosa and T. atomaria, respectively. The dominant saturated fatty acids are palmitic acid and stearic acid. The highest level of palmitic acid (32.27%) was found in E. flexuosa in Viransehir beach. The highest level of stearic acid was found on the coast of Viransehir (7.20%), U. linza. The highest level of ΣSFA was found in the U. linza species on Taskiran coast (37.89%), and the lowest level was determined in the T. atomaria species on the Taskiran coast (18.13%). It is oleic acid that has a high level of monounsaturated fatty acids. The highest level of this fatty acid (10.35%) was found in E. flexuosa species in Viransehir beach. The highest level of ΣMUFA was found in the Viransehir coast (16.67%) and the lowest level (11.39%) in the U. linza on the Viransehir beach. The highest level of linolelaidic acid in polyunsaturated fatty acids was found in E. flexuosa in Viransehir beach (3.34%). The highest level of linoleic acid (4.85%) was found in U. linza on the coast of Viransehir. The highest level of ΣPUFA was found in T. atomaria on the Taskiran coast (16.56%), and the lowest level (7.03%) was found in U. linza.","PeriodicalId":142687,"journal":{"name":"Acta Natura et Scientia","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127785883","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 : 2021-06-16DOI: 10.29329/actanatsci.2021.314.11
İsmail Karakaş, Çanakkale Onsekiz Mart Üniversitesi Lisansüstü Eğitim Enstitüsü, B. Izci, C. Z. Fakültesi
This research was carried out to determine the rooting performances of different rooting media (Soil, Peat and CoCopeat) on the cuttings of the plants of the Lavender (Lavandula angustifolia) Hemus, Sevtopolis and Drujba varieties and Super A variety plants (Lavandula intermedia). Cuttings were planted in three different environments in the greenhouse mediums. Rooting rate, root length, shoot number and shoot length were determined in the cuttings left for rooting for approximately 60 days. As a result of the research, the highest rooting rate was obtained from Lavandula intermedia Super A variety in cocopeat medium with 62%, and the lowest rooting rate was obtained from Lavandula angustifolia Sevtopolis and Drujba cultivars in soil environment. The highest root length was obtained from Lavandula angustifolia Sevtopolis variety in cocopeat medium with 3.32 cm, and the lowest root length was obtained from Lavandula angustifolia Hemus cultivar in soil environment with 2.34 cm. The highest number of shoots was obtained from Lavandula angustifolia Drujba variety with 7.93 in cocopeat environment, and the lowest shoot number was obtained from Lavandula intermedia Super A variety with 6.93 in soil environment. The highest shoot length was 5.90 cm in Lavandula angustifolia Sevtopolis variety in cocopeat environment and the lowest shoot length was 4.19 cm in soil environment from Lavandula angustifolia Hemus variety.
{"title":"Effects of Three Different Rooting Media on Some Rooting Parameters of Cuttings Belonging to Lavandula angustifolia and Lavandula intermedia Species","authors":"İsmail Karakaş, Çanakkale Onsekiz Mart Üniversitesi Lisansüstü Eğitim Enstitüsü, B. Izci, C. Z. Fakültesi","doi":"10.29329/actanatsci.2021.314.11","DOIUrl":"https://doi.org/10.29329/actanatsci.2021.314.11","url":null,"abstract":"This research was carried out to determine the rooting performances of different rooting media (Soil, Peat and CoCopeat) on the cuttings of the plants of the Lavender (Lavandula angustifolia) Hemus, Sevtopolis and Drujba varieties and Super A variety plants (Lavandula intermedia). Cuttings were planted in three different environments in the greenhouse mediums. Rooting rate, root length, shoot number and shoot length were determined in the cuttings left for rooting for approximately 60 days. As a result of the research, the highest rooting rate was obtained from Lavandula intermedia Super A variety in cocopeat medium with 62%, and the lowest rooting rate was obtained from Lavandula angustifolia Sevtopolis and Drujba cultivars in soil environment. The highest root length was obtained from Lavandula angustifolia Sevtopolis variety in cocopeat medium with 3.32 cm, and the lowest root length was obtained from Lavandula angustifolia Hemus cultivar in soil environment with 2.34 cm. The highest number of shoots was obtained from Lavandula angustifolia Drujba variety with 7.93 in cocopeat environment, and the lowest shoot number was obtained from Lavandula intermedia Super A variety with 6.93 in soil environment. The highest shoot length was 5.90 cm in Lavandula angustifolia Sevtopolis variety in cocopeat environment and the lowest shoot length was 4.19 cm in soil environment from Lavandula angustifolia Hemus variety.","PeriodicalId":142687,"journal":{"name":"Acta Natura et Scientia","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117007764","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 : 2021-06-16DOI: 10.29329/actanatsci.2021.314.10
S. Akin, M. Bulut
In this study, a feeding experiment was conducted using different rations (25%, 50%, 75%, and 100%) of wheat flour protein instead of fishmeal in fry fish (Dicentrarchus labrax) feeds. In the experiment, an average weight of 2.33±0.2 g juvenile seabass was used. Seabass fries were fed with the experimental feeds for 60 days. The experiment was designed in triplicates. At the end of the experiment, the growth parameters and fatty acid composition of fish fries were examined. As a result, it was statistically determined that the use of wheat flour protein at a high rate had a negative effect on the growth parameters of the fish. Significant changes in fatty acid composition were also observed.
{"title":"The Effect of Using Wheat Protein at Different Ratios Instead of Fish Meal on Growth Parameters and Fatty Acid of Juvenile Sea Bass (Dicentrarchus labrax L. 1758)","authors":"S. Akin, M. Bulut","doi":"10.29329/actanatsci.2021.314.10","DOIUrl":"https://doi.org/10.29329/actanatsci.2021.314.10","url":null,"abstract":"In this study, a feeding experiment was conducted using different rations (25%, 50%, 75%, and 100%) of wheat flour protein instead of fishmeal in fry fish (Dicentrarchus labrax) feeds. In the experiment, an average weight of 2.33±0.2 g juvenile seabass was used. Seabass fries were fed with the experimental feeds for 60 days. The experiment was designed in triplicates. At the end of the experiment, the growth parameters and fatty acid composition of fish fries were examined. As a result, it was statistically determined that the use of wheat flour protein at a high rate had a negative effect on the growth parameters of the fish. Significant changes in fatty acid composition were also observed.","PeriodicalId":142687,"journal":{"name":"Acta Natura et Scientia","volume":"129 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120970855","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 : 2021-06-08DOI: 10.29329/actanatsci.2021.314.9
E. Taşkavak, Ş. Gürkan, B. Taylan
In this study, we discussed the size of devil firefish Pterois miles (Bennett, 1828) specimen obtained from commercial fishermen who trawl off the coast of Tasucu, Silifke (36°3’32.70”N; 34°3’51.33”E). The obtained specimen was 335 mm in total length, 258 cm in standard length, and 0.696 kg in weight. The dissected specimen was a mature male. The testicles were weighed as 20.77 g and are in the third maturity stage. Additionally, during scuba diving to the underwater cave of Mersin Silifke, Besparmak Island, a group of devil firefish was photographed at depths less than 15 meters. Contrary to many records on the hard rocky bottom at depths more than 20 meters, it has been observed by us that many anglers on the dock of Mersin Tasucu port were catching the devil firefish together with sympatric pufferfish (Lagocephalus sceleratus) in shallow waters of sandy bottom less than 3 meters at depth.
{"title":"Some Observations on the Depth Range and Size of Devil Firefish Pterois miles (Bennett, 1828) (Scorpaenidae) in Silifke Mersin (Turkey)","authors":"E. Taşkavak, Ş. Gürkan, B. Taylan","doi":"10.29329/actanatsci.2021.314.9","DOIUrl":"https://doi.org/10.29329/actanatsci.2021.314.9","url":null,"abstract":"In this study, we discussed the size of devil firefish Pterois miles (Bennett, 1828) specimen obtained from commercial fishermen who trawl off the coast of Tasucu, Silifke (36°3’32.70”N; 34°3’51.33”E). The obtained specimen was 335 mm in total length, 258 cm in standard length, and 0.696 kg in weight. The dissected specimen was a mature male. The testicles were weighed as 20.77 g and are in the third maturity stage. Additionally, during scuba diving to the underwater cave of Mersin Silifke, Besparmak Island, a group of devil firefish was photographed at depths less than 15 meters. Contrary to many records on the hard rocky bottom at depths more than 20 meters, it has been observed by us that many anglers on the dock of Mersin Tasucu port were catching the devil firefish together with sympatric pufferfish (Lagocephalus sceleratus) in shallow waters of sandy bottom less than 3 meters at depth.","PeriodicalId":142687,"journal":{"name":"Acta Natura et Scientia","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125913065","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 : 2021-05-30DOI: 10.29329/actanatsci.2021.314.7
Ö. Cengiz, Ş. Paruğ
In this study, growth parameters of 648 specimens of Spicara maena hunted by small-scale commercial fishermen around Saros Bay between January 2016 and December 2016 were studied. Of the 648 specimens analyzed, 509 were female and 139 were male. The length-weight relationship was calculated as for females and for males. The von Bertalanffy growth equations were computed as =22.1 cm, k=0.27 , =-1.42 year for the females; =20.6 cm, k=0.39, , = –1.11 year for the males. The growth performance index () was found as 2.12 and 2.22 for the females and males, respectively. This study includes preliminary information on the growth of the blotched picarel in Saros Bay (Northern Aegean Sea, Turkey).
本研究对2016年1月至2016年12月期间，沙罗斯湾附近小规模商业渔民捕获的648只斑背鱼的生长参数进行了研究。在分析的648只标本中，509只为雌性，139只为雄性。计算长度-权重关系为女性和男性。von Bertalanffy生长方程为:=22.1 cm, k=0.27， =-1.42 year;=20.6 cm, k=0.39，雄性= -1.11年。雌性和雄性的生长性能指数()分别为2.12和2.22。这项研究包括了沙罗斯湾(土耳其爱琴海北部)斑纹picarel生长的初步信息。
{"title":"Growth Parameters of Blotched Picarel (Spicara maena Linnaeus, 1758) From Saros Bay (Northern Aegean Sea, Turkey)","authors":"Ö. Cengiz, Ş. Paruğ","doi":"10.29329/actanatsci.2021.314.7","DOIUrl":"https://doi.org/10.29329/actanatsci.2021.314.7","url":null,"abstract":"In this study, growth parameters of 648 specimens of Spicara maena hunted by small-scale commercial fishermen around Saros Bay between January 2016 and December 2016 were studied. Of the 648 specimens analyzed, 509 were female and 139 were male. The length-weight relationship was calculated as for females and for males. The von Bertalanffy growth equations were computed as =22.1 cm, k=0.27 , =-1.42 year for the females; =20.6 cm, k=0.39, , = –1.11 year for the males. The growth performance index () was found as 2.12 and 2.22 for the females and males, respectively. This study includes preliminary information on the growth of the blotched picarel in Saros Bay (Northern Aegean Sea, Turkey).","PeriodicalId":142687,"journal":{"name":"Acta Natura et Scientia","volume":"1 9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133121967","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 : 2021-05-30DOI: 10.29329/actanatsci.2021.314.8
E. Tan, B. Kızılkaya
In this study, the adsorption change of products obtained by chemical modification of waste fish bones, which are a biogenic-induced apathetic source, has been examined. Histidine (MH) and tryptophan (MT) were used for chemical surface modification, and cationic paint was used as fuchsine adsorbent. Paint adsorption was performed in water. The adsorption of MH and MT products was determined as 0.48 and 0.69 in 6.76 dye solution. The amount that MH and MT modified materials removed from the solution was 35.46 and 50.71%, respectively. As a result, it has been determined that the apatite-induced bones have affected the adsorption capacities of dyers as a result of different chemical molecular modifications. Additionally, it has been determined that the molecules with different qualities and properties affect the balance of adsorption. It has been observed that unprofitable products were suitable for chemical modification and adsorption procedures thanks to surface modification. With the development of studies in this field, it can be said that waste-resourced products will contribute to environmental use with effective, qualified, and useful materials.
{"title":"Fuchsine Dye Adsorption of Surface Modified Biogenic Apatite With Tryptophan and Histidine","authors":"E. Tan, B. Kızılkaya","doi":"10.29329/actanatsci.2021.314.8","DOIUrl":"https://doi.org/10.29329/actanatsci.2021.314.8","url":null,"abstract":"In this study, the adsorption change of products obtained by chemical modification of waste fish bones, which are a biogenic-induced apathetic source, has been examined. Histidine (MH) and tryptophan (MT) were used for chemical surface modification, and cationic paint was used as fuchsine adsorbent. Paint adsorption was performed in water. The adsorption of MH and MT products was determined as 0.48 and 0.69 in 6.76 dye solution. The amount that MH and MT modified materials removed from the solution was 35.46 and 50.71%, respectively. As a result, it has been determined that the apatite-induced bones have affected the adsorption capacities of dyers as a result of different chemical molecular modifications. Additionally, it has been determined that the molecules with different qualities and properties affect the balance of adsorption. It has been observed that unprofitable products were suitable for chemical modification and adsorption procedures thanks to surface modification. With the development of studies in this field, it can be said that waste-resourced products will contribute to environmental use with effective, qualified, and useful materials.","PeriodicalId":142687,"journal":{"name":"Acta Natura et Scientia","volume":"112 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114387304","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 : 2021-05-17DOI: 10.29329/actanatsci.2021.314.6
B. Kızılkaya, H. Ayyıldız, Aytaç Altın, Ş. Y. Özdilek
In this study, surface morphology and chemical structure of Pagrus pagrus (Linnaeus 1758) sagittal otolith from the shores of Gizli liman to Kefalos Cape in the north of Gokceada Island, Turkey were investigated using scanning electron microscopy (SEM) and energy dispersion X-ray spectroscopy (EDS) analyses. According to the results of SEM analysis, the species was found to be over two years old. The age rings of P. pagrus were clearly identified on the otolith by SEM. According to the EDS results, it was examined that the element contents of age rings and regions between the sagittal otoliths obtained by EDS analysis. It was observed that calcium, carbon, and oxygen elements that form the calcium carbonate were the highest in EDS analysis. In addition, it has been found that the percentage of protein in ring structures, especially, in rings related to the age factor showed an increase. It can be said that this structural difference plays a major role in the clarification of age ring. Furthermore, the scandium (Sc) element was firstly discovered in the structure of the sagittal otoliths of P. pagrus from Gokceada, Turkey. Scandium is one of the indicator elements in thermal regions. This study describes the presence of scandium trace element for the first time in the structure of otolith.
{"title":"First Report of the Scandium Element in Pagrus pagrus Otoliths: A Potential Indicator of Thermal Activity From Gökçeada Island, Turkey","authors":"B. Kızılkaya, H. Ayyıldız, Aytaç Altın, Ş. Y. Özdilek","doi":"10.29329/actanatsci.2021.314.6","DOIUrl":"https://doi.org/10.29329/actanatsci.2021.314.6","url":null,"abstract":"In this study, surface morphology and chemical structure of Pagrus pagrus (Linnaeus 1758) sagittal otolith from the shores of Gizli liman to Kefalos Cape in the north of Gokceada Island, Turkey were investigated using scanning electron microscopy (SEM) and energy dispersion X-ray spectroscopy (EDS) analyses. According to the results of SEM analysis, the species was found to be over two years old. The age rings of P. pagrus were clearly identified on the otolith by SEM. According to the EDS results, it was examined that the element contents of age rings and regions between the sagittal otoliths obtained by EDS analysis. It was observed that calcium, carbon, and oxygen elements that form the calcium carbonate were the highest in EDS analysis. In addition, it has been found that the percentage of protein in ring structures, especially, in rings related to the age factor showed an increase. It can be said that this structural difference plays a major role in the clarification of age ring. Furthermore, the scandium (Sc) element was firstly discovered in the structure of the sagittal otoliths of P. pagrus from Gokceada, Turkey. Scandium is one of the indicator elements in thermal regions. This study describes the presence of scandium trace element for the first time in the structure of otolith.","PeriodicalId":142687,"journal":{"name":"Acta Natura et Scientia","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129430829","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 : 2021-05-10DOI: 10.29329/actanatsci.2021.314.5
L. C. Irkin, Şamil Öztürk
The sampling point of the research was determined as the shores of Canakkale Strait, where fishing is dense. Seasonal sampling of European pilchard (Sardina pilchardus, Walbaum 1792) was made that caught by commercial fishing boats in Canakkale Strait and rarely offered for consumption. Inductively Coupled Plasma-Optical Emission Spectrometer (ICP-OES) allows analysis of trace, minor and major concentration levels of the chemical element, was used to determine the amount of heavy metals in the samples. Analysis of Cadmium (Cd), Copper (Cu), Iron (Fe), Manganese (Mn), Lead (Pb) and Zinc (Zn) heavy metals in samples was performed by the United States Environmental Protection Agency (US EPA). Levels of Cd, Cu, Fe, Mn, Pb and Zn were determined in muscle tissues of European pilchard. In the samples, Cd values were detected only in autumn, Cu level was found highest in winter, Fe and Zn levels were highest in spring and the level of Mn was observed higher in winter. Pb has not been detected in fish muscle dough in any season. Mn level has been obtained above the limit values and Cd level was found under the offered limits. As a result, it has been determined that the heavy metal accumulation in the muscle tissues of European pilchard caught from Canakkale Strait increased seasonally in parallel with the increase of pollution.
{"title":"Seasonal Examination of Heavy Metal Levels in Muscle Tissues of European pilchard (Sardina pilchardus, Walbaum 1792)","authors":"L. C. Irkin, Şamil Öztürk","doi":"10.29329/actanatsci.2021.314.5","DOIUrl":"https://doi.org/10.29329/actanatsci.2021.314.5","url":null,"abstract":"The sampling point of the research was determined as the shores of Canakkale Strait, where fishing is dense. Seasonal sampling of European pilchard (Sardina pilchardus, Walbaum 1792) was made that caught by commercial fishing boats in Canakkale Strait and rarely offered for consumption. Inductively Coupled Plasma-Optical Emission Spectrometer (ICP-OES) allows analysis of trace, minor and major concentration levels of the chemical element, was used to determine the amount of heavy metals in the samples. Analysis of Cadmium (Cd), Copper (Cu), Iron (Fe), Manganese (Mn), Lead (Pb) and Zinc (Zn) heavy metals in samples was performed by the United States Environmental Protection Agency (US EPA). Levels of Cd, Cu, Fe, Mn, Pb and Zn were determined in muscle tissues of European pilchard. In the samples, Cd values were detected only in autumn, Cu level was found highest in winter, Fe and Zn levels were highest in spring and the level of Mn was observed higher in winter. Pb has not been detected in fish muscle dough in any season. Mn level has been obtained above the limit values and Cd level was found under the offered limits. As a result, it has been determined that the heavy metal accumulation in the muscle tissues of European pilchard caught from Canakkale Strait increased seasonally in parallel with the increase of pollution.","PeriodicalId":142687,"journal":{"name":"Acta Natura et Scientia","volume":"53 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132413165","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 : 2021-05-06DOI: 10.29329/actanatsci.2021.314.4
Sevim Hamzaçebi, E. Can
The aim of the present study is to investigate spawning and larval rearing of brown meagre (Sciaena umbra). This is an important species in the Mediterranean Sea because of its beauty, calm swimming, large otoliths, souvenir potential, aggregative behaviour, excellent flesh and accessibility. Although this species is regarded as Near Threatened (in IUCN Red List Status), the demand increases the fishing. Green water technique was used for rearing the brown meagre larvae. Diameter of eggs was recorded as 1457.31±47.29 µm. Yolk was homogenous with oil globules of 371.59±18.15 µm at the centre. Hatching process began after 39 hours. Hatching rate (HR) was observed as 92.17±0.24%, and larvae inflated swim bladder around 97.33±0.94%. The brown meagre juveniles reached to 40.08±1.98 mm of total length (TL) with 10.96±0.08 mm body height (BH) and 662.27±21.23 mg body weight (BW) after 55 days of post-hatching. Survival (SR) was recorded as 72.5±0.70% at the end of study. Since the brown meagre is a threatened species, with high economic interest, is a possible candidate for commercial aquaculture both food and restocking the depleted natural fisheries.
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Pub Date : 2021-05-04DOI: 10.29329/actanatsci.2021.314.2
H. Sayğı, A. Kop, Hatice Tekoğul, B. Taylan
Data envelopment analysis is used when it is difficult to measure the relative effectiveness of organizational decision-making units due to a large number of similar inputs and outputs. Firstly, data envelopment analysis was discussed in this study. In this context, relative activities of 10 companies have been operating in fisheries sector for last nine years (2009-2017) which entered the Fortune 500 in Turkey and have sufficient data were measured using financial inputs and outputs. Relative effectiveness scores were obtained by examining the financial inputs and outputs of the companies that are in the Fortune 500 and operating in fisheries sector. In the second part of study, to reveal the technical efficiency and the ineffective ones resulting from the scale, DEA models including the input-oriented CCR (Charnes, Cooper, and Rhodes) and BCC (Banker, Charnes, and Cooper) model were established and the above mentioned procedures were repeated. Finally, it was investigated whether an investment system based on DEA could be established or not. DEA Frontier and DEA Solver software, one of the special software of DEA, was used for the solution of models using in data envelopment analysis. As a result of the study, the average efficacy percentage was found to be 88% for CCR and 93% for BCC. For the data obtained during 2009-2017, six companies were found to be active according to the CCR model, while seven companies were found to be effective according to the BCC model. Also, the targets were determined to activate the inactive companies.
当组织决策单位的相对有效性由于大量相似的输入和输出而难以衡量时，使用数据包络分析。本文首先对数据包络分析进行了探讨。在此背景下，过去九年(2009-2017年)有10家公司在渔业部门开展相关活动，这些公司进入了土耳其的财富500强，并使用财务投入和产出来衡量足够的数据。相对有效性得分是通过检查财富500强中从事渔业业务的公司的财务投入和产出来获得的。在研究的第二部分，为了揭示技术效率和规模导致的无效效率，我们建立了DEA模型，包括投入导向的CCR (Charnes, Cooper, and Rhodes)和BCC (Banker, Charnes, and Cooper)模型，并重复上述步骤。最后，对基于DEA的投资体系能否建立进行了探讨。采用DEA Frontier和DEA Solver软件(DEA的专用软件之一)对数据包络分析中的模型进行求解。研究结果显示，CCR的平均有效率为88%，BCC的平均有效率为93%。对于2009-2017年获得的数据，根据CCR模型发现有6家公司活跃，而根据BCC模型发现有7家公司有效。此外，还确定了目标，以激活不活跃的公司。
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