N. Bouriga, W. Bahri, S. Bejaoui, M. F. A. Houeto, A. A. Shahin, J. Quiganrd, M. Trabelsi, A. B. Faleh
: Fatty acid composition and otolith shape variation of six commercially important fishes, which differ ecologically in their living and feeding habits across the Gulf of Tunis, Tunisia, were analyzed. The aims were to investigate the discrimination and relationship between the six species using both fatty acid composition and otolith shape to examine whether variability in fatty acid composition is consistent with variation in otolith shape and check whether otoliths shape and fatty acids composition have combined characteristic signals for these species. Tukey’s test with one-way ANOVA indicated significant differences in total percentages of saturated (SFAs), polyunsaturated (PUFAs), and monounsaturated (MUFAs) fatty acids between individuals of the six species, and only between males and females of Gobius niger , and Trachinus draco . Discriminant function analysis (DFA) separated the six species into two main distinct clusters or groups. The first group comprised Mullus barbatus , G . niger , and T . draco , which assume a benthic life, while the second included Sardina pilchardus , Trachurus mediterraneus, and Chelon auratus , which are benthopelagic to pelagic species. Wilk’s λ test and Fisher’s distance ( D ) matrix showed a significant bilateral asymmetry in the left and right otoliths shape between individuals of the six species, as well as only between males and females of C . auratus , T . mediterraneus , and G . niger . However, a significant bilateral asymmetry was found only between females of G . niger and males of T . draco . DFA and hierarchical ascending classification (HAC) based on otolith shape variance revealed two main groups of otoliths congruent to those obtained from fatty acid composition analysis. The results indicated that fatty acid composition analysis was compatible with otolith shape analysis, and both have combined characteristic signals for these species and validated the use of fatty acid composition and otolith shape analyses as an effective approach to discriminate between and within these species.
对突尼斯突尼斯湾6种重要商业鱼类的脂肪酸组成和耳石形状变化进行了分析，这些鱼类在生态上的生活和摄食习性不同。目的是利用脂肪酸组成和耳石形状来研究6种物种之间的区别和关系，以检验脂肪酸组成的变化是否与耳石形状的变化一致，并检查耳石形状和脂肪酸组成是否结合了这些物种的特征信号。Tukey的单因素方差分析表明，6种鱼的饱和脂肪酸(sfa)、多不饱和脂肪酸(PUFAs)和单不饱和脂肪酸(MUFAs)的总百分比在个体之间存在显著差异，并且仅在黑Gobius和Trachinus draco的雄性和雌性之间存在显著差异。判别函数分析(Discriminant function analysis, DFA)将6种植物划分为两个不同的主要聚类或类群。第一组包括马刺，G。和T。第二种包括沙丁鱼、地中海沙鱼和auratus，它们是底栖到远洋的物种。Wilk’s λ检验和Fisher’s distance (D)矩阵显示，6种个体的左右耳石形状存在显著的双边不对称，且仅存在于C的雌雄之间。奥拉图，T。地中海和G。尼日尔。然而，显著的双侧不对称仅在G。黑曲霉和雄性黑曲霉。德拉科。DFA和基于耳石形状方差的分层上升分类(HAC)显示，两组耳石与脂肪酸组成分析结果一致。结果表明，脂肪酸组成分析与耳石形状分析是兼容的，两者都结合了这些物种的特征信号，并验证了脂肪酸组成和耳石形状分析是区分这些物种和物种内部的有效方法。
{"title":"Discrimination between six commercially relevant and ecologically diverse fish species across the Gulf of Tunis using fatty acid composition and otolith shape analyses","authors":"N. Bouriga, W. Bahri, S. Bejaoui, M. F. A. Houeto, A. A. Shahin, J. Quiganrd, M. Trabelsi, A. B. Faleh","doi":"10.55730/1300-0179.3136","DOIUrl":"https://doi.org/10.55730/1300-0179.3136","url":null,"abstract":": Fatty acid composition and otolith shape variation of six commercially important fishes, which differ ecologically in their living and feeding habits across the Gulf of Tunis, Tunisia, were analyzed. The aims were to investigate the discrimination and relationship between the six species using both fatty acid composition and otolith shape to examine whether variability in fatty acid composition is consistent with variation in otolith shape and check whether otoliths shape and fatty acids composition have combined characteristic signals for these species. Tukey’s test with one-way ANOVA indicated significant differences in total percentages of saturated (SFAs), polyunsaturated (PUFAs), and monounsaturated (MUFAs) fatty acids between individuals of the six species, and only between males and females of Gobius niger , and Trachinus draco . Discriminant function analysis (DFA) separated the six species into two main distinct clusters or groups. The first group comprised Mullus barbatus , G . niger , and T . draco , which assume a benthic life, while the second included Sardina pilchardus , Trachurus mediterraneus, and Chelon auratus , which are benthopelagic to pelagic species. Wilk’s λ test and Fisher’s distance ( D ) matrix showed a significant bilateral asymmetry in the left and right otoliths shape between individuals of the six species, as well as only between males and females of C . auratus , T . mediterraneus , and G . niger . However, a significant bilateral asymmetry was found only between females of G . niger and males of T . draco . DFA and hierarchical ascending classification (HAC) based on otolith shape variance revealed two main groups of otoliths congruent to those obtained from fatty acid composition analysis. The results indicated that fatty acid composition analysis was compatible with otolith shape analysis, and both have combined characteristic signals for these species and validated the use of fatty acid composition and otolith shape analyses as an effective approach to discriminate between and within these species.","PeriodicalId":49407,"journal":{"name":"Turkish Journal of Zoology","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41747461","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
E. Y. Lafooraki, J. Hajizadeh, M. Shayanmehr, R. Hosseini, P. P. Fanciulli
: Present work deals with providing an identification key to 60 Iranian species of the family Isotomidae. The photographic support provided here, both light micrographs and scanning electron microscopy (SEM) pictures, can be used as a practical tool for researchers who are not well acquainted with the morphology of Isotomidae.
{"title":"Key to Isotomidae (Collembola) of Iran and a photographic guide of key characters of species","authors":"E. Y. Lafooraki, J. Hajizadeh, M. Shayanmehr, R. Hosseini, P. P. Fanciulli","doi":"10.55730/1300-0179.3116","DOIUrl":"https://doi.org/10.55730/1300-0179.3116","url":null,"abstract":": Present work deals with providing an identification key to 60 Iranian species of the family Isotomidae. The photographic support provided here, both light micrographs and scanning electron microscopy (SEM) pictures, can be used as a practical tool for researchers who are not well acquainted with the morphology of Isotomidae.","PeriodicalId":49407,"journal":{"name":"Turkish Journal of Zoology","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45943628","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
: The aim of the study was to trace the influence of several abiotic factors on the distribution of the mesozooplankton community from the Black Sea. Sampling was performed in cold and warm seasons of 2013–2020, from stations located on the three sectors of the Romanian Black Sea coast (northern-N, central-C, and southern-S). After determining the species composition, abundance, and biomass, the results were subjected to statistical analysis. A total of 25 taxa were identified, Copepoda representing the bulk of the community. The analysis of the main components explains, through the first two identified factors—temperature and salinity, the variation of environmental factors. The mesozooplanktonic community responded differently to the analysed environmental factors, recording positive and negative correlations, depending on the water column’s depth; a positive correlation was observed between mesozooplank-ton and temperature while negative correlations were observed between nutrients (silicon) and mesozooplankton.
{"title":"Interactions between environmental factors and the mesozooplankton community from the Romanian Black Sea waters","authors":"E. Bișinicu, G. Harcotă, L. Lazăr","doi":"10.55730/1300-0179.3133","DOIUrl":"https://doi.org/10.55730/1300-0179.3133","url":null,"abstract":": The aim of the study was to trace the influence of several abiotic factors on the distribution of the mesozooplankton community from the Black Sea. Sampling was performed in cold and warm seasons of 2013–2020, from stations located on the three sectors of the Romanian Black Sea coast (northern-N, central-C, and southern-S). After determining the species composition, abundance, and biomass, the results were subjected to statistical analysis. A total of 25 taxa were identified, Copepoda representing the bulk of the community. The analysis of the main components explains, through the first two identified factors—temperature and salinity, the variation of environmental factors. The mesozooplanktonic community responded differently to the analysed environmental factors, recording positive and negative correlations, depending on the water column’s depth; a positive correlation was observed between mesozooplank-ton and temperature while negative correlations were observed between nutrients (silicon) and mesozooplankton.","PeriodicalId":49407,"journal":{"name":"Turkish Journal of Zoology","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48092573","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
: Oxyclozanide is a salicylanilide derivative anthelmintic drug with a well-known effect on parasites that cause infections in humans and animals. In this study, the effect of oxyclozanide on DNA damage in hemocytes of Galleria mellonella (L.) (Lepidoptera: Pyralidae) larvae, which has been used as a model organism in many fields, was investigated. Hemolymph was collected from the last instar larvae (7th instar) reared on artificial diets containing oxyclozanide at different concentrations (0.003%, 0.03%, 0.3%, and 1.5%) under laboratory conditions and then hemocytes suspension was prepared. Genotoxic damage in hemocytes was determined by the comet assay which enables microscopically detecting DNA damage and is a very sensitive assay in chemical genotoxicity. When compared to the control group, tail length, tail DNA percent, and tail moment values were significantly increased parallel with increasing oxyclozanide concentrations. While the tail length was determined as 5.11 ± 0.46 µm in the control group, it was significantly increased in all tested groups to 13.17 ± 0.53, 27.98 ± 1.08, 98.44 ± 0.77, and 137.67 ± 0.74 µm, respectively. Similarly to tail length, tail DNA percentage and tail moment levels were also significantly increased from 12.86 ± 0.74 to 91.96 ± 0.31 at the highest concentration of oxyclozanide. These results showed that oxyclozanide caused DNA damage in the hemocytes of G. mellonella . It is also known that hemocytes are an important bioindicator in determining the genotoxicity of anthelmintics to be used as insecticides within environmentally friendly limits. It is thought that our results will contribute to the studies in this field.
{"title":"Genotoxic effects of oxyclozanide on hemocytes of Galleria mellonella (Lepidoptera: Pyralidae) larvae","authors":"C. Çelik, D. Stanley, E. Büyükgüzel","doi":"10.55730/1300-0179.3126","DOIUrl":"https://doi.org/10.55730/1300-0179.3126","url":null,"abstract":": Oxyclozanide is a salicylanilide derivative anthelmintic drug with a well-known effect on parasites that cause infections in humans and animals. In this study, the effect of oxyclozanide on DNA damage in hemocytes of Galleria mellonella (L.) (Lepidoptera: Pyralidae) larvae, which has been used as a model organism in many fields, was investigated. Hemolymph was collected from the last instar larvae (7th instar) reared on artificial diets containing oxyclozanide at different concentrations (0.003%, 0.03%, 0.3%, and 1.5%) under laboratory conditions and then hemocytes suspension was prepared. Genotoxic damage in hemocytes was determined by the comet assay which enables microscopically detecting DNA damage and is a very sensitive assay in chemical genotoxicity. When compared to the control group, tail length, tail DNA percent, and tail moment values were significantly increased parallel with increasing oxyclozanide concentrations. While the tail length was determined as 5.11 ± 0.46 µm in the control group, it was significantly increased in all tested groups to 13.17 ± 0.53, 27.98 ± 1.08, 98.44 ± 0.77, and 137.67 ± 0.74 µm, respectively. Similarly to tail length, tail DNA percentage and tail moment levels were also significantly increased from 12.86 ± 0.74 to 91.96 ± 0.31 at the highest concentration of oxyclozanide. These results showed that oxyclozanide caused DNA damage in the hemocytes of G. mellonella . It is also known that hemocytes are an important bioindicator in determining the genotoxicity of anthelmintics to be used as insecticides within environmentally friendly limits. It is thought that our results will contribute to the studies in this field.","PeriodicalId":49407,"journal":{"name":"Turkish Journal of Zoology","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45350454","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
: The importance of underground hibernacula for the conservation of bats and monitoring their populations is well-recognized. However, the lowland territory of Belarus, with absent natural caves and suitable for bats mines, was one of the least surveyed European regions in terms of underground bat sites, and especially hibernacula. To address this knowledge gap, in 2020, we conducted a broad-scale one winter bat survey, exploring 90 underground sites (basements, cellars, church crypts, fortifications, and facilities of abandoned Soviet missile bases) in various parts of Belarus. To our knowledge, none of these sites had been examined for bats before. In 56 of the 90 underground sites, we discovered hibernating bats (a total of 1054 ind.) of six species: Barbastella barbastellus (78.5% of all bats), Myotis daubentonii (7.4%), Plecotus auritus (5.1%), Eptesicus nilssonii (4.9%), Myotis brandtii and Eptesicus serotinus (in sum, 2%). The distribution of bats among the hibernacula was highly uneven (with N Me = 3; N av = 19 ind.). In 76% of the hibernacula, the number of bats was between 1 and 10 individuals per site, which accounted for approximately 10% of all bats recorded during the survey. Only in five sites we found over 50 bats. One to four species were present in each site, with one species found in 58% of the hibernacula. We suppose that the small number of species and relatively small number of bats per hibernaculum is characteristic of the study region. This supports the
{"title":"Discovering underground bat hibernacula in lowland eastern Europe","authors":"L. Godlevska, A. Shpak, M. Savchenko, P. Vorobei","doi":"10.55730/1300-0179.3137","DOIUrl":"https://doi.org/10.55730/1300-0179.3137","url":null,"abstract":": The importance of underground hibernacula for the conservation of bats and monitoring their populations is well-recognized. However, the lowland territory of Belarus, with absent natural caves and suitable for bats mines, was one of the least surveyed European regions in terms of underground bat sites, and especially hibernacula. To address this knowledge gap, in 2020, we conducted a broad-scale one winter bat survey, exploring 90 underground sites (basements, cellars, church crypts, fortifications, and facilities of abandoned Soviet missile bases) in various parts of Belarus. To our knowledge, none of these sites had been examined for bats before. In 56 of the 90 underground sites, we discovered hibernating bats (a total of 1054 ind.) of six species: Barbastella barbastellus (78.5% of all bats), Myotis daubentonii (7.4%), Plecotus auritus (5.1%), Eptesicus nilssonii (4.9%), Myotis brandtii and Eptesicus serotinus (in sum, 2%). The distribution of bats among the hibernacula was highly uneven (with N Me = 3; N av = 19 ind.). In 76% of the hibernacula, the number of bats was between 1 and 10 individuals per site, which accounted for approximately 10% of all bats recorded during the survey. Only in five sites we found over 50 bats. One to four species were present in each site, with one species found in 58% of the hibernacula. We suppose that the small number of species and relatively small number of bats per hibernaculum is characteristic of the study region. This supports the","PeriodicalId":49407,"journal":{"name":"Turkish Journal of Zoology","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47897735","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
: Nest site selection differs among species based on a characteristic crucial to the embryo’s survival. The identified nest-site characteristics of the Euphrates softshell turtle highlight that these turtles, like their other soft-shelled relatives, highly prefer the sandy substrate, even pure sand, to nest. However, alteration and loss of natural habitats for many decades limited the suitable oviposition sites along the Euphrates River. This study presents the uncharacteristic nest-site choice and the nesting time of Euphrates softshell turtle for the first time. I discovered four nests, as well as six unhatched eggs in a nest on 20 August 2017. This discovery extends the known nesting season-end from early June to at least mid-August for the Euphrates River. The eggs were spherical, and their size was 28.38 (±0.2, 28.1–28.6) mm on average. The nesting substrate, consisting of only 51.8% sand, was substantially dissimilar to what was previously reported. Apart from the soil texture, the nest and its site characteristics concerning nest dimension, clutch size, egg size, and distance to the shoreline concord with what was formerly reported. I conclude that many anthropogenic alterations, such as sand mining and damming and hence the scarcity of suitable oviposition sites, may have caused location and time shift of breeding and forced the turtles to nest in these uncommon soil textures
{"title":"Does Euphrates softshell turtle nest in unfavourable substratum? Description of nests from Euphrates River, Türkiye","authors":"Yusuf Bayrakcı","doi":"10.55730/1300-0179.3129","DOIUrl":"https://doi.org/10.55730/1300-0179.3129","url":null,"abstract":": Nest site selection differs among species based on a characteristic crucial to the embryo’s survival. The identified nest-site characteristics of the Euphrates softshell turtle highlight that these turtles, like their other soft-shelled relatives, highly prefer the sandy substrate, even pure sand, to nest. However, alteration and loss of natural habitats for many decades limited the suitable oviposition sites along the Euphrates River. This study presents the uncharacteristic nest-site choice and the nesting time of Euphrates softshell turtle for the first time. I discovered four nests, as well as six unhatched eggs in a nest on 20 August 2017. This discovery extends the known nesting season-end from early June to at least mid-August for the Euphrates River. The eggs were spherical, and their size was 28.38 (±0.2, 28.1–28.6) mm on average. The nesting substrate, consisting of only 51.8% sand, was substantially dissimilar to what was previously reported. Apart from the soil texture, the nest and its site characteristics concerning nest dimension, clutch size, egg size, and distance to the shoreline concord with what was formerly reported. I conclude that many anthropogenic alterations, such as sand mining and damming and hence the scarcity of suitable oviposition sites, may have caused location and time shift of breeding and forced the turtles to nest in these uncommon soil textures","PeriodicalId":49407,"journal":{"name":"Turkish Journal of Zoology","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43668292","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
M. Dağtekin, G. Dalgic, M. Erbay, İ. Akpınar, Mehmet Aydin, Süleyman Özdemi̇r, Ayşe Cebeci̇, S. Karayücel
: Blood cockle ( Anadara kagoshimensis ) is an Indo-Pacific species that later entered the Black Sea. The abundance of A. kagoshimensis , which is not subjected to commercial fishing, is important in terms of food competition with other bivalvia species. Baby clam ( Chamelea gallina ) together with the A. kagoshimensis are dominant bivalve species found in the sandy and muddy areas off the coastal waters of the Black Sea. In this study, specimens of A. kagoshimensis have been recognized by morphological analysis and also confirmed by molecular characterization. Furthermore, the abundance and growth parameters of A. kagoshimensis were investigated in the Southwestern Black Sea. Blood cockles were sampled between February 2011 and December 2012, seasonally. According to the Von Bertalanffy Growth Parameters (VBGP) the results were L ∞ = 81.96 mm, K = 0.32 year –1 , t 0 = –0.22 year, and nonseasonal L ∞ = 84.32 mm, K = 0.31 year –1 , t 0 = –0.21, WP = 0.65, t s = 0.15. The growth pattern showed the slope [b] = 2.96–3.01 in 2011 and 2012. The stock size was estimated according to two different years in 5 different subareas (Cide, İnebolu, Türkeli, Ayancık, and Sarıkum) and by 4 different strata (0–5 m, 5–10 m, 10–15 m, and 15–20 m). Considering subareas, the A. kagoshimensis population in all subareas increased significantly in a single year. Compared to other regions, İnebolu was the main highly distributed area of the A. kagoshimensis , and also the estimated stock size was the highest in the region. Due to food competition with other commercial species (mainly Chamelea gallina ) A. kagoshimensis is an ecology important species for the Southern Black Sea habitats. It is aimed to make contributions to Good Environmental Status (GES) and fisheries management in the region.
{"title":"Population abundance and growth parameters of an exotic bivalve species, Anadara kagoshimensis, in the Southwestern Black Sea","authors":"M. Dağtekin, G. Dalgic, M. Erbay, İ. Akpınar, Mehmet Aydin, Süleyman Özdemi̇r, Ayşe Cebeci̇, S. Karayücel","doi":"10.55730/1300-0179.3109","DOIUrl":"https://doi.org/10.55730/1300-0179.3109","url":null,"abstract":": Blood cockle ( Anadara kagoshimensis ) is an Indo-Pacific species that later entered the Black Sea. The abundance of A. kagoshimensis , which is not subjected to commercial fishing, is important in terms of food competition with other bivalvia species. Baby clam ( Chamelea gallina ) together with the A. kagoshimensis are dominant bivalve species found in the sandy and muddy areas off the coastal waters of the Black Sea. In this study, specimens of A. kagoshimensis have been recognized by morphological analysis and also confirmed by molecular characterization. Furthermore, the abundance and growth parameters of A. kagoshimensis were investigated in the Southwestern Black Sea. Blood cockles were sampled between February 2011 and December 2012, seasonally. According to the Von Bertalanffy Growth Parameters (VBGP) the results were L ∞ = 81.96 mm, K = 0.32 year –1 , t 0 = –0.22 year, and nonseasonal L ∞ = 84.32 mm, K = 0.31 year –1 , t 0 = –0.21, WP = 0.65, t s = 0.15. The growth pattern showed the slope [b] = 2.96–3.01 in 2011 and 2012. The stock size was estimated according to two different years in 5 different subareas (Cide, İnebolu, Türkeli, Ayancık, and Sarıkum) and by 4 different strata (0–5 m, 5–10 m, 10–15 m, and 15–20 m). Considering subareas, the A. kagoshimensis population in all subareas increased significantly in a single year. Compared to other regions, İnebolu was the main highly distributed area of the A. kagoshimensis , and also the estimated stock size was the highest in the region. Due to food competition with other commercial species (mainly Chamelea gallina ) A. kagoshimensis is an ecology important species for the Southern Black Sea habitats. It is aimed to make contributions to Good Environmental Status (GES) and fisheries management in the region.","PeriodicalId":49407,"journal":{"name":"Turkish Journal of Zoology","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48594192","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Md. Moshiur Rahman, Nur Asma Ariffin, Y. G. Seah, T. N. A. M. Jaafar, A. Habib
: The present study offers the first report of length-weight relationships (LWRs) and relative condition factor (K n ) of coral-associated snapper fishes namely: Lutjanus johnii, L. quinquelineatus , and L. xanthopinnis collected from Pulau Kambing fish landing port, Terengganu waters of South China Sea, Malaysia. This study also offers a new maximum total length of 26.8 cm (standard length of 21.3 cm) for L. xanthopinnis . A total of 861 specimens were collected monthly from March 2022 to February 2023 that were caught by using different types of fishing gear such as gill nets (mesh size 45–48 mm), hooks (numbers 9–12), and trawl nets (cod end mesh size 38 mm). In LWRs the growth coefficient b value was calculated at 2.602, 2.962, and 3.051, and the coefficient of determination r 2 value 0.948, 0.906, and 0.961 for L. johnii , L. xanthopinnis , and L. quinquelineatus , respectively. The student’s t-test showed L. johnii had a negative allometric growth pattern. On the other hand, L. quinquelineatus and L. xanthopinnis showed an isometric growth pattern. The K n values for L. johnii , L. quinquelineatus , and L. xanthopinnis were 1.005, 1.030, and 1.024 which indicates they are in a state of healthy growth. LWRs data for three Lutjanus species from the Malaysian South China Sea can be used for fisheries research and management of stocks.
{"title":"Length-weight relationships and relative condition factors of three coral-associated Lutjanus species from Terengganu waters of the South China Sea, Malaysia","authors":"Md. Moshiur Rahman, Nur Asma Ariffin, Y. G. Seah, T. N. A. M. Jaafar, A. Habib","doi":"10.55730/1300-0179.3134","DOIUrl":"https://doi.org/10.55730/1300-0179.3134","url":null,"abstract":": The present study offers the first report of length-weight relationships (LWRs) and relative condition factor (K n ) of coral-associated snapper fishes namely: Lutjanus johnii, L. quinquelineatus , and L. xanthopinnis collected from Pulau Kambing fish landing port, Terengganu waters of South China Sea, Malaysia. This study also offers a new maximum total length of 26.8 cm (standard length of 21.3 cm) for L. xanthopinnis . A total of 861 specimens were collected monthly from March 2022 to February 2023 that were caught by using different types of fishing gear such as gill nets (mesh size 45–48 mm), hooks (numbers 9–12), and trawl nets (cod end mesh size 38 mm). In LWRs the growth coefficient b value was calculated at 2.602, 2.962, and 3.051, and the coefficient of determination r 2 value 0.948, 0.906, and 0.961 for L. johnii , L. xanthopinnis , and L. quinquelineatus , respectively. The student’s t-test showed L. johnii had a negative allometric growth pattern. On the other hand, L. quinquelineatus and L. xanthopinnis showed an isometric growth pattern. The K n values for L. johnii , L. quinquelineatus , and L. xanthopinnis were 1.005, 1.030, and 1.024 which indicates they are in a state of healthy growth. LWRs data for three Lutjanus species from the Malaysian South China Sea can be used for fisheries research and management of stocks.","PeriodicalId":49407,"journal":{"name":"Turkish Journal of Zoology","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42987122","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
I. B. Daban, Y. Şen, A. Ayaz, Uğur Altinağaç, Alkan Öztekin, Uğur Özekinci, A. İşmen, Fikret Çakır, A. Yüksek, Tekin Demirkiran, O. Ayaz, Gençtan Erman Uğur, Büminhan Burkay Selçuk
: A dense mucilage event occurred between November 2020 and August 2021 in the Marmara Sea, Turkey. In this study, the aim was to understand the effect of mucilage on coastal fish biodiversity. For this purpose, juvenile and small-sized adult fish species were sampled with an experimental beach seine at 12 equally-spaced stations around the Marmara Sea between November 2021 and April 2022. In total, 34 species belonging to 19 families were sampled. Approximately 70% of the total fish abundance were Atherina boyeri Risso, 1810 , Chelon auratus (Risso, 1810) and Chelon saliens (Risso, 1810). Highest abundance was detected from S5 (Marmara Ereğlisi) and S11 (Florya) comprising 17.3% and 14.2% of total abundance, respectively. Maximum species richness was found at S4 (Erdek) and S12 (Yalova Tigem), with 21 and 18 species, respectively. The highest biodiversity indexes were seen at S4, S8 (Karacabey floodplain area) and S12, whereas the lowest biodiversity index was found at S9 (Büyükçekmece). S4 and S8 should be monitored and protected by fisheries management authorities due to being nursery and protection areas for the Sea of Marmara. When the biomass and biodiversity of the coastal fish assemblages were compared with previous studies conducted before the mucilage event, it can be said that mucilage did not adversely affect recruitment success.
{"title":"Postmucilage biodiversity of shallow water fish assemblages: A case study in the Marmara Sea, Turkey","authors":"I. B. Daban, Y. Şen, A. Ayaz, Uğur Altinağaç, Alkan Öztekin, Uğur Özekinci, A. İşmen, Fikret Çakır, A. Yüksek, Tekin Demirkiran, O. Ayaz, Gençtan Erman Uğur, Büminhan Burkay Selçuk","doi":"10.55730/1300-0179.3132","DOIUrl":"https://doi.org/10.55730/1300-0179.3132","url":null,"abstract":": A dense mucilage event occurred between November 2020 and August 2021 in the Marmara Sea, Turkey. In this study, the aim was to understand the effect of mucilage on coastal fish biodiversity. For this purpose, juvenile and small-sized adult fish species were sampled with an experimental beach seine at 12 equally-spaced stations around the Marmara Sea between November 2021 and April 2022. In total, 34 species belonging to 19 families were sampled. Approximately 70% of the total fish abundance were Atherina boyeri Risso, 1810 , Chelon auratus (Risso, 1810) and Chelon saliens (Risso, 1810). Highest abundance was detected from S5 (Marmara Ereğlisi) and S11 (Florya) comprising 17.3% and 14.2% of total abundance, respectively. Maximum species richness was found at S4 (Erdek) and S12 (Yalova Tigem), with 21 and 18 species, respectively. The highest biodiversity indexes were seen at S4, S8 (Karacabey floodplain area) and S12, whereas the lowest biodiversity index was found at S9 (Büyükçekmece). S4 and S8 should be monitored and protected by fisheries management authorities due to being nursery and protection areas for the Sea of Marmara. When the biomass and biodiversity of the coastal fish assemblages were compared with previous studies conducted before the mucilage event, it can be said that mucilage did not adversely affect recruitment success.","PeriodicalId":49407,"journal":{"name":"Turkish Journal of Zoology","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45705348","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
S. Yedier, Seda Yalçınkaya, D. Türker, D. Bostancı
: Pagellus acarne is found in coastal waters worldwide and it includes important species of commercial and recreational fisheries. In this study, 16 morphometric variables of the sagittal otolith, including six morphometric characters, six shape indices, and four ecomorphological indexes, were investigated for the first time among P. acarne stocks collected from the Aegean and Marmara Seas coasts of Turkey. Statistically significant differences were found between the right and left otolith variables of P. acarne individuals in both stocks (p < 0.05). Similarly, significant differences were observed on the same side between stocks (p < 0.05). The right otoliths exhibited higher discrimination power than the left within the two stocks. The PCA showed that only five (31.25%) (otolith area, otolith perimeter, form factor, roundness, and edge complexity index) out of the sixteen variables were quite important characters in the differentiation between stocks. These otolith characters demonstrated a very high rate of accurate discrimination (99.0%) between stocks. The results indicated otolith morphometric characters, shape indices, and ecomorphological indexes can be used as suitable tools to discriminate P. acarne stocks. This is the first study to include all otolith characters such as morphometrics, shape, and ecomorphological indices that discriminate between P. acarne stocks from these localities.
{"title":"Ecomorphological patterns and shape indices of otoliths in the Pagellus acarne (Actinopterygii, Sparidae) from the Aegean and Marmara Seas","authors":"S. Yedier, Seda Yalçınkaya, D. Türker, D. Bostancı","doi":"10.55730/1300-0179.3135","DOIUrl":"https://doi.org/10.55730/1300-0179.3135","url":null,"abstract":": Pagellus acarne is found in coastal waters worldwide and it includes important species of commercial and recreational fisheries. In this study, 16 morphometric variables of the sagittal otolith, including six morphometric characters, six shape indices, and four ecomorphological indexes, were investigated for the first time among P. acarne stocks collected from the Aegean and Marmara Seas coasts of Turkey. Statistically significant differences were found between the right and left otolith variables of P. acarne individuals in both stocks (p < 0.05). Similarly, significant differences were observed on the same side between stocks (p < 0.05). The right otoliths exhibited higher discrimination power than the left within the two stocks. The PCA showed that only five (31.25%) (otolith area, otolith perimeter, form factor, roundness, and edge complexity index) out of the sixteen variables were quite important characters in the differentiation between stocks. These otolith characters demonstrated a very high rate of accurate discrimination (99.0%) between stocks. The results indicated otolith morphometric characters, shape indices, and ecomorphological indexes can be used as suitable tools to discriminate P. acarne stocks. This is the first study to include all otolith characters such as morphometrics, shape, and ecomorphological indices that discriminate between P. acarne stocks from these localities.","PeriodicalId":49407,"journal":{"name":"Turkish Journal of Zoology","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48401860","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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