Pub Date : 2024-02-11DOI: 10.1134/s0032945224020164
M. Wang, J. Huang, Y. Chen, D. He
Abstract
A new species, Triplophysa shannanensis sp. nov., is described from the Yarlung Tsangpo-Brahmaputra River based on morphological and genetic analyses. The new species is distinguished from its congeners by the following combination of characters: posterior chamber of swim bladder developed, ovoid, directly connects to the anterior chamber; intestine short, zigzag-shaped and with two loops; lower jaw spoon-like, blunt, and covered by lips; snout length shorter than postorbital length; dorsal fin origin anterior to the ventral fin origin, and it closer to caudal fin base than tip of snout; the pelvic origin is just below vertical from the second branched dorsal fin ray, and tips of ventral fin reaching to anus or close to anal fin origin; vertebrae 4 + 36–38; gill rakers 10–11. Molecular phylogenetic analysis indicated that the new species is situated in the most basal of the genus Triplophysa species distributed in the Himalayan region of China. The Kimura’s 2-parameter interspecific genetic distance of the cytochrome b gene sequences of the new species differed from 5.6 to 20.3% with other Triplophysa species. Two non-native species, T. dalaica and T. scleroptera, were first found in the the Yarlung Tsangpo River, which would bring the number of Triplophysa in the Tibetan Himalaya of China to eleven species. A checklist of genus Triplophysa in Chinese Himalaya was further provided.
{"title":"Triplophysa shannanensis, a New Species of Tibetan Stone Loach (Nemacheilidae) from the Yarlung Tsangpo-Brahmaputra River, Tibet","authors":"M. Wang, J. Huang, Y. Chen, D. He","doi":"10.1134/s0032945224020164","DOIUrl":"https://doi.org/10.1134/s0032945224020164","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>A new species, <i>Triplophysa shannanensis</i> sp. nov., is described from the Yarlung Tsangpo-Brahmaputra River based on morphological and genetic analyses. The new species is distinguished from its congeners by the following combination of characters: posterior chamber of swim bladder developed, ovoid, directly connects to the anterior chamber; intestine short, zigzag-shaped and with two loops; lower jaw spoon-like, blunt, and covered by lips; snout length shorter than postorbital length; dorsal fin origin anterior to the ventral fin origin, and it closer to caudal fin base than tip of snout; the pelvic origin is just below vertical from the second branched dorsal fin ray, and tips of ventral fin reaching to anus or close to anal fin origin; vertebrae 4 + 36–38; gill rakers 10–11. Molecular phylogenetic analysis indicated that the new species is situated in the most basal of the genus <i>Triplophysa</i> species distributed in the Himalayan region of China. The Kimura’s 2-parameter interspecific genetic distance of the cytochrome <i>b</i> gene sequences of the new species differed from 5.6 to 20.3% with other <i>Triplophysa</i> species. Two non-native species, <i>T. dalaica</i> and <i>T</i>. <i>scleroptera,</i> were first found in the the Yarlung Tsangpo River, which would bring the number of <i>Triplophysa</i> in the Tibetan Himalaya of China to eleven species. A checklist of genus <i>Triplophysa</i> in Chinese Himalaya was further provided.</p>","PeriodicalId":48537,"journal":{"name":"Journal of Ichthyology","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2024-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139772992","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}
Pub Date : 2024-02-11DOI: 10.1134/s0032945224020115
Abstract
Present study reports black-edged fin sandlance, Bleekeria nigrilinea Psomadakis, Yoshinaga, Wah et Ida, 2021, for the first time from the Bay of Bengal, Indian waters, on the basis of three specimens. Specimens were collected from the Shankarpur fishing harbour and identified as Bleekeria nigrilinea through molecular analysis and were subjected to full morphological analysis. This species has previously been reported from the Andaman Sea (Myanmar and Thailand).
{"title":"DNA Barcoding Confirms the First Record of Bleekeria nigrilinea (Ammodytidae) from the Bay of Bengal, Indian Coastal Water","authors":"","doi":"10.1134/s0032945224020115","DOIUrl":"https://doi.org/10.1134/s0032945224020115","url":null,"abstract":"<span> <h3>Abstract</h3> <p>Present study reports black-edged fin sandlance, <em>Bleekeria nigrilinea</em> Psomadakis, Yoshinaga, Wah et Ida, 2021, for the first time from the Bay of Bengal, Indian waters, on the basis of three specimens. Specimens were collected from the Shankarpur fishing harbour and identified as <em>Bleekeria nigrilinea</em> through molecular analysis and were subjected to full morphological analysis. This species has previously been reported from the Andaman Sea (Myanmar and Thailand).</p> </span>","PeriodicalId":48537,"journal":{"name":"Journal of Ichthyology","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2024-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139754899","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}
Pub Date : 2024-02-11DOI: 10.1134/s0032945224020085
D. A. Pavlov, A. G. Osinov
Abstract
Otolith abnormalities and bilateral asymmetry are analyzed in five reproductively isolated forms and natural F1 hybrids between the forms in Arctic charr Salvelinus alpinus complex from lakes Lama and Kapchuk (Norilo-Pyasinskaya water system, Taimyr). Otolith abnormalities are associated with the partial replacement of aragonite (the usual otolithic polymorph of CaCO3) by vaterite (another less stable crystalline modification of CaCO3) and their unusual shape. The abnormalities are observed in 11.9% of the specimens and may be induced by technogenic pollution from Nornickel, the world’s largest manufacturer of palladium, nickel, and platinum. The assessment of bilateral asymmetry based on otolith measurements and shape indices does not indicate notable differences in this parameter between the charr forms. However, the shapes of the left and right otoliths described by wavelet analysis are significantly different in two groups: a form of Lake Kapchuk designated as the main form and F1 hybrids. The differentiation of the forms is evaluated using wavelet and linear discriminant analyses of otolith shape. The difference in the topologies of two dendrograms constructed based on the shapes of the left and right otoliths obtained from the same specimens can be explained by the occurrence of bilateral asymmetry.
摘要 分析了拉马湖和卡普丘克湖（泰米尔诺里洛-皮亚辛斯卡亚水系）北极鲑Salvelinus alpinus复合体中五种生殖隔离形态和形态之间的天然F1杂交种的耳石异常和双侧不对称现象。耳石畸形与文石（耳石中常见的 CaCO3 多晶体）部分被瓦特石（CaCO3 的另一种不太稳定的结晶变体）取代及其异常形状有关。11.9%的标本都出现了这种异常，可能是世界上最大的钯、镍和铂金生产商诺镍尔公司的技术污染造成的。根据耳石测量和形状指数对双侧不对称的评估结果显示，不同形态的鲑鱼在这一参数上没有明显差异。不过，通过小波分析描述的左右耳石形状在两组中存在显著差异：一组是卡普丘克湖的主要形态，另一组是 F1 杂交种。利用耳石形状的小波分析和线性判别分析评估了这些形态的区别。根据从同一标本中获得的左右耳石形状构建的两个树枝图的拓扑结构差异可以用出现双侧不对称来解释。
{"title":"Abnormalities and Bilateral Asymmetry of Otoliths in Arctic Charr Salvelinus alpinus Complex (Salmonidae) from Lakes Lama and Kapchuk, Taimyr","authors":"D. A. Pavlov, A. G. Osinov","doi":"10.1134/s0032945224020085","DOIUrl":"https://doi.org/10.1134/s0032945224020085","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>Otolith abnormalities and bilateral asymmetry are analyzed in five reproductively isolated forms and natural F1 hybrids between the forms in Arctic charr <i>Salvelinus alpinus</i> complex from lakes Lama and Kapchuk (Norilo-Pyasinskaya water system, Taimyr). Otolith abnormalities are associated with the partial replacement of aragonite (the usual otolithic polymorph of CaCO<sub>3</sub>) by vaterite (another less stable crystalline modification of CaCO<sub>3</sub>) and their unusual shape. The abnormalities are observed in 11.9% of the specimens and may be induced by technogenic pollution from Nornickel, the world’s largest manufacturer of palladium, nickel, and platinum. The assessment of bilateral asymmetry based on otolith measurements and shape indices does not indicate notable differences in this parameter between the charr forms. However, the shapes of the left and right otoliths described by wavelet analysis are significantly different in two groups: a form of Lake Kapchuk designated as the main form and F1 hybrids. The differentiation of the forms is evaluated using wavelet and linear discriminant analyses of otolith shape. The difference in the topologies of two dendrograms constructed based on the shapes of the left and right otoliths obtained from the same specimens can be explained by the occurrence of bilateral asymmetry.</p>","PeriodicalId":48537,"journal":{"name":"Journal of Ichthyology","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2024-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139773230","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}
Pub Date : 2024-02-11DOI: 10.1134/s0032945224020036
K. Karuppiah, K. Rajendran, Y. Mariasingarayan, C. P. Kumarasamy, K. Ethiraj
Abstract
Lethrinidae is one of the commercially important fish in India. The present study provides detailed morphometric, meristic characters and colour patterns of Monotaxis heterodon (Bleeker, 1854). The unique key characters of M. heterodon are having 24 vertebrae, the teeth patterns of both the jaws having molar teeth present in both jaws 4+3 but 6 canines in upper jaw and 4 canine teeth in lower jaw. Specifically, this species has dark brownish lips, no black spots at base of soft dorsal fin and 13 scale rows below lateral line to anal-fin origin. The COI gene sequence and phylogenetic analysis confirmed that Monotaxis heterodon and Monotaxis grandoculis were genetically distinct species and conform the distribution of M. heterodon in Indian Exclusive Economic Zone. In addition, molecular analysis using partial mitochondrial COI gene suggests that genetic distance within M. heterodon group was 0.32% of group mean distance between M. heterodon and M. grandoculis was 8.37%. Further, the present study revealed the range of extension of its known geographical distribution in addition to the ichthyofaunal biodiversity of southeast coast of India.
AbstractLethrinidae 是印度重要的商业鱼类之一。本研究提供了Monotaxis heterodon（Bleeker，1854 年）的详细形态计量、分身特征和颜色模式。M.heterodon的独特关键特征是有24个椎骨，两颚的牙齿形态为臼齿4+3，但上颚有6颗犬齿，下颚有4颗犬齿。具体来说，该物种的嘴唇呈黑褐色，软背鳍基部无黑斑，侧线以下至臀鳍起源处有 13 个鳞片排。COI 基因序列和系统发育分析证实异齿单棘鲷和大鳞单棘鲷在遗传学上是不同的物种，符合异齿单棘鲷在印度专属经济区的分布情况。此外，利用部分线粒体 COI 基因进行的分子分析表明，M. heterodon 组内的遗传距离为 0.32%，M. heterodon 和 M. grandoculis 组间的平均距离为 8.37%。此外，本研究揭示了其已知地理分布的扩展范围，以及印度东南沿海的鱼类生物多样性。
{"title":"First Record of Redfin Emperor Monotaxis heterodon (Lethrinidae) from Indian Waters with Molecular Confirmation","authors":"K. Karuppiah, K. Rajendran, Y. Mariasingarayan, C. P. Kumarasamy, K. Ethiraj","doi":"10.1134/s0032945224020036","DOIUrl":"https://doi.org/10.1134/s0032945224020036","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>Lethrinidae is one of the commercially important fish in India. The present study provides detailed morphometric, meristic characters and colour patterns of <i>Monotaxis heterodon</i> (Bleeker, 1854). The unique key characters of <i>M. heterodon</i> are having 24 vertebrae, the teeth patterns of both the jaws having molar teeth present in both jaws 4+3 but 6 canines in upper jaw and 4 canine teeth in lower jaw. Specifically, this species has dark brownish lips, no black spots at base of soft dorsal fin and 13 scale rows below lateral line to anal-fin origin. The <i>COI</i> gene sequence and phylogenetic analysis confirmed that <i>Monotaxis heterodon</i> and <i>Monotaxis grandoculis</i> were genetically distinct species and conform the distribution of <i>M. heterodon</i> in Indian Exclusive Economic Zone. In addition, molecular analysis using partial mitochondrial <i>COI</i> gene suggests that genetic distance within <i>M. heterodon</i> group was 0.32% of group mean distance between <i>M. heterodon</i> and <i>M. grandoculis</i> was 8.37%. Further, the present study revealed the range of extension of its known geographical distribution in addition to the ichthyofaunal biodiversity of southeast coast of India.</p>","PeriodicalId":48537,"journal":{"name":"Journal of Ichthyology","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2024-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139754974","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}
Pub Date : 2024-02-11DOI: 10.1134/s0032945224020139
A. Sepil, F. Şen
Abstract
In this study, it was aimed to determine the larval ontogeny of Paraphanius mento (Heckel, 1843), which is distributed in Nemrut Crater Lake (Bitlis, Turkiye). Additionally, embryonic and larval development stages were evaluated microscopically and histologically. Filamentous and sticky fertilized eggs has a diameter of 1.251 ± 0.316 mm with the inclusion of 8−12 oil droplets have started to hatch approximately 11 days after spawning at 23.5°C. It was determined that newly hatched larvae have a total length of around 3.695 ± 0.225 mm (n = 20), have started exogenous feeding at 3 day after hatching and started to take particulate baits at the end of 10 day after hatching. Digestive tract differentiation, hepatopancreas, digestive tubes and gill arches formations were examined by taking histological sections in early life stages.
{"title":"Ontogeny of Larval Pearl-Spotted Killifish Paraphanius mento (Aphaniidae) Distributed in the Nemrut Crater Lake (Eastern Turkiye): A Histological and Microscopic Perspective","authors":"A. Sepil, F. Şen","doi":"10.1134/s0032945224020139","DOIUrl":"https://doi.org/10.1134/s0032945224020139","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>In this study, it was aimed to determine the larval ontogeny of <i>Paraphanius mento</i> (Heckel, 1843), which is distributed in Nemrut Crater Lake (Bitlis, Turkiye). Additionally, embryonic and larval development stages were evaluated microscopically and histologically. Filamentous and sticky fertilized eggs has a diameter of 1.251 ± 0.316 mm with the inclusion of 8−12 oil droplets have started to hatch approximately 11 days after spawning at 23.5°C. It was determined that newly hatched larvae have a total length of around 3.695 ± 0.225 mm (<i>n</i> = 20), have started exogenous feeding at 3 day after hatching and started to take particulate baits at the end of 10 day after hatching. Digestive tract differentiation, hepatopancreas, digestive tubes and gill arches formations were examined by taking histological sections in early life stages.</p>","PeriodicalId":48537,"journal":{"name":"Journal of Ichthyology","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2024-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139754977","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}
Pub Date : 2024-02-01DOI: 10.1134/s0032945224010028
Abstract—
Tonlesapia tsukawakii Motomura et Mukai, 2006 is an endemic freshwater representative of the family Callionymidae (Teleostei: Perciformes: Callionymidei) living in the Mekong River. According to the materials of studies conducted in 2018–2022, the occurrence of the species in catches in the Mekong Delta averaged 20.7%, the proportion in terms of abundance was 2.6%, in terms of weight, 0.6%. The maximum values of the species parameters were 81.2 ind./effort and 176.2 g/effort, respectively. The abundance of fish significantly decreased in the conditions of low content of dissolved oxygen and on a substrate with plant residues. The sex ratio of T. tsukawakii was 1.0 : 3.1 with a stable prevalence of females, which distinguishes the species from other representatives of the family. Females have larger sizes compared to males and they gain weight faster. The fecundity of the species was determined for the first time; the average number of mature oocytes was 2950 psc. During a low-water period, callanoid copepods of the family Pseudodiaptomidae mainly represented by Pseudodiaptomus dauglishi Sewell, 1932 were the main food items of T. tsukawakii.
{"title":"Features of Biology of Tonlesapia tsukawakii (Actinopterygii, Callionymidae) in the Mekong Delta, Vietnam","authors":"","doi":"10.1134/s0032945224010028","DOIUrl":"https://doi.org/10.1134/s0032945224010028","url":null,"abstract":"<span> <h3>Abstract—</h3> <p><em>Tonlesapia tsukawakii</em> Motomura et Mukai, 2006 is an endemic freshwater representative of the family Callionymidae (Teleostei: Perciformes: Callionymidei) living in the Mekong River. According to the materials of studies conducted in 2018–2022, the occurrence of the species in catches in the Mekong Delta averaged 20.7%, the proportion in terms of abundance was 2.6%, in terms of weight, 0.6%. The maximum values of the species parameters were 81.2 ind./effort and 176.2 g/effort, respectively. The abundance of fish significantly decreased in the conditions of low content of dissolved oxygen and on a substrate with plant residues. The sex ratio of <em>T. tsukawakii</em> was 1.0 : 3.1 with a stable prevalence of females, which distinguishes the species from other representatives of the family. Females have larger sizes compared to males and they gain weight faster. The fecundity of the species was determined for the first time; the average number of mature oocytes was 2950 psc. During a low-water period, callanoid copepods of the family Pseudodiaptomidae mainly represented by <em>Pseudodiaptomus dauglishi</em> Sewell, 1932 were the main food items of <em>T. tsukawakii</em>.</p> </span>","PeriodicalId":48537,"journal":{"name":"Journal of Ichthyology","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140302210","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}
Pub Date : 2024-02-01DOI: 10.1134/s0032945224010107
Abstract—
Based on comparative morphological studies of weatherfishes (genus Misgurnus) collected in the Ili River basin (Kazakhstan) in 2022, specimens from the collection of the Zoological Museum of Lomonosov Moscow State University, and literature data, it is shown for the first time that the oriental weatherfish Misgurnus anguillicaudatus has naturalized in the Balkhash-Ili basin.
{"title":"Misgurnus anguillicaudatus (Cobitidae): a New Non-Native Species Naturalized in Water Bodies of the Balkhash-Ili Basin, Kazakhstan","authors":"","doi":"10.1134/s0032945224010107","DOIUrl":"https://doi.org/10.1134/s0032945224010107","url":null,"abstract":"<span> <h3>Abstract—</h3> <p>Based on comparative morphological studies of weatherfishes (genus <em>Misgurnus</em>) collected in the Ili River basin (Kazakhstan) in 2022, specimens from the collection of the Zoological Museum of Lomonosov Moscow State University, and literature data, it is shown for the first time that the oriental weatherfish <em>Misgurnus anguillicaudatus</em> has naturalized in the Balkhash-Ili basin.</p> </span>","PeriodicalId":48537,"journal":{"name":"Journal of Ichthyology","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140302250","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}
Pub Date : 2023-12-29DOI: 10.1134/s0032945224010168
E. D. Vasil’eva, V. P. Vasil’ev
Abstract
The conducted craniological analysis of Sabanejewia larvata and S. aurata did not reveal fundamental differences in the general morphology of the skull and skull bones between them. Comparison with previously studied Sabanejewia caspia, S. kubanica, S. caucasica, and S. aralensis showed that all investigated species have species-specific values for some craniological indices. Sabanejewia larvata and S. caspia are most similar and are characterized by the lowest skull in the ethmoid region, the widest praeoperculum, the ascending process of the dentary displaced anteriorly, and the narrowest cleithrum. The obtained results confirm the validity of the subgenus Andrzewia. At the same time, the observed craniological divergence of S. aurata and S. aralensis testifies in favor of an independent species status of the golden loach from the Aral Sea basin. However, further genetic and morphological studies are needed.
摘要 对Sabanejewia larvata和S. aurata进行的颅骨学分析没有发现它们之间在头骨和颅骨的总体形态上存在根本性差异。与之前研究过的 Sabanejewia caspia、S. kubanica、S. caucasica 和 S. aralensis 相比，所有被研究的物种在某些颅骨学指标上都具有物种特异性。Sabanejewia larvata 和 S. caspia 最为相似，其特点是头骨在乙状体区域最低，前胸最宽，齿状体的上升突向前移，蝶窦最窄。这些结果证实了 Andrzewia 亚属的有效性。同时，观察到的 S. aurata 和 S. aralensis 的颅骨分化也证明了咸海盆地金鳅的独立物种地位。不过，还需要进一步的遗传学和形态学研究。
{"title":"Craniological Features of Sabanejewia larvata (Cobitidae) and its Divergence from S. aurata and Other Congeneric Species","authors":"E. D. Vasil’eva, V. P. Vasil’ev","doi":"10.1134/s0032945224010168","DOIUrl":"https://doi.org/10.1134/s0032945224010168","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The conducted craniological analysis of <i>Sabanejewia larvata</i> and <i>S. aurata</i> did not reveal fundamental differences in the general morphology of the skull and skull bones between them. Comparison with previously studied <i>Sabanejewia caspia</i>, <i>S. kubanica</i>, <i>S. caucasica,</i> and <i>S. aralensis</i> showed that all investigated species have species-specific values for some craniological indices. <i>Sabanejewia larvata</i> and <i>S. caspia</i> are most similar and are characterized by the lowest skull in the ethmoid region, the widest praeoperculum, the ascending process of the dentary displaced anteriorly, and the narrowest cleithrum. The obtained results confirm the validity of the subgenus <i>Andrzewia</i>. At the same time, the observed craniological divergence of <i>S. aurata</i> and <i>S. aralensis</i> testifies in favor of an independent species status of the golden loach from the Aral Sea basin. However, further genetic and morphological studies are needed.</p>","PeriodicalId":48537,"journal":{"name":"Journal of Ichthyology","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2023-12-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139067345","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}
Pub Date : 2023-12-29DOI: 10.1134/s0032945224010156
N. K. Suyani, D. T. Vaghela, S. S. Rathore, B. Sureandiran
Abstract
The morphometric and meristic characteristics, length-length relationships (LLRs), length-weight relationships (LWRs) and relative condition factor of forty-one individuals of red cornetfish Fistularia petimba were studied for the first time from the North-West coast of India during February to September 2022. The maximum coefficient of variation was observed for inter-orbital length (25.85%) followed by lower jaw length (18.14%) and pectoral-fin length (16.96%). The morphometric index value was found <10% (genetically-controlled characters) for all the morphometric characters except total length with caudal filament length indicating restricted distribution. LLRs revealed isometric growth and high values of correlation coefficient (0.6109–0.9992). The b value of LWRs showed significant departure from 3 (p < 0.05) and hence negative allometric growth was recorded. The high R2 value of the LWRs indicates absolute fitness of the growth model and superior health status of the studied species. The mean condition factor value was calculated as 0.99 ± 0.04 indicating that the F. petimba population is in good health. Further, F. petimba is a reef-associated species forming a part of low-value bycatch which is mainly utilized for the preparation of fishmeal. Thus the provided morphometric and biometric information of the species will be useful for further biological, stock assessment and nutritional research in the region.
{"title":"First Report on Biometric Analysis of Red Cornetfish Fistularia petimba (Fistulariidae) from Indian Waters","authors":"N. K. Suyani, D. T. Vaghela, S. S. Rathore, B. Sureandiran","doi":"10.1134/s0032945224010156","DOIUrl":"https://doi.org/10.1134/s0032945224010156","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The morphometric and meristic characteristics, length-length relationships (LLRs), length-weight relationships (LWRs) and relative condition factor of forty-one individuals of red cornetfish <i>Fistularia petimba</i> were studied for the first time from the North-West coast of India during February to September 2022. The maximum coefficient of variation was observed for inter-orbital length (25.85%) followed by lower jaw length (18.14%) and pectoral-fin length (16.96%). The morphometric index value was found <10% (genetically-controlled characters) for all the morphometric characters except total length with caudal filament length indicating restricted distribution. LLRs revealed isometric growth and high values of correlation coefficient (0.6109–0.9992). The <i>b</i> value of LWRs showed significant departure from 3 (<i>p</i> < 0.05) and hence negative allometric growth was recorded. The high <i>R</i><sup>2</sup> value of the LWRs indicates absolute fitness of the growth model and superior health status of the studied species. The mean condition factor value was calculated as 0.99 ± 0.04 indicating that the <i>F. petimba</i> population is in good health. Further, <i>F. petimba</i> is a reef-associated species forming a part of low-value bycatch which is mainly utilized for the preparation of fishmeal. Thus the provided morphometric and biometric information of the species will be useful for further biological, stock assessment and nutritional research in the region.</p>","PeriodicalId":48537,"journal":{"name":"Journal of Ichthyology","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2023-12-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139066860","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}
Pub Date : 2023-12-29DOI: 10.1134/s0032945224010120
S. Gurkan, E. Taskavak, B. Taylan
Abstract
In this study, we aimed to state how we can contribute to an effective population management and protection by determining the morphometric characteristics of European yellow eels, Anguilla anguilla Linnaeus 1758, in the Aegean Sea population, Izmir Bay. It was found that the eye index and condition values of the female specimens are higher than those of the males. While it was determined that there was a significant difference between both sexes in 19 of 20 morphometric measurements of the head region, there was no statistical difference only in the height measurement at the nostril level of the head. In our study, the fact that specimens with ovaries were seen among the females longer than 34 cm (length group II) is remarkable in terms of early maturation in the region. The differences in head measurements between sexes indicate the existence of a dimorphic structure and these differences are in favor of female specimens.
{"title":"A Preliminary Study on the Morphometric Features of the European Eel, Anguilla anguilla (Anguillidae) in Gediz Lagoon (Izmir Bay, the Aegean Sea): Special Emphasis to Sexual Dimorphism","authors":"S. Gurkan, E. Taskavak, B. Taylan","doi":"10.1134/s0032945224010120","DOIUrl":"https://doi.org/10.1134/s0032945224010120","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>In this study, we aimed to state how we can contribute to an effective population management and protection by determining the morphometric characteristics of European yellow eels, <i>Anguilla anguilla</i> Linnaeus 1758, in the Aegean Sea population, Izmir Bay. It was found that the eye index and condition values of the female specimens are higher than those of the males. While it was determined that there was a significant difference between both sexes in 19 of 20 morphometric measurements of the head region, there was no statistical difference only in the height measurement at the nostril level of the head. In our study, the fact that specimens with ovaries were seen among the females longer than 34 cm (length group II) is remarkable in terms of early maturation in the region. The differences in head measurements between sexes indicate the existence of a dimorphic structure and these differences are in favor of female specimens.</p>","PeriodicalId":48537,"journal":{"name":"Journal of Ichthyology","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2023-12-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139066866","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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