Pub Date : 2024-05-14DOI: 10.1134/s0032945224020103
Yu. N. Poltev, A. V. Luchenkov
Abstract—
A case of bulk harvesting the shortraker rockfish Sebastes borealis in the water masses off the northeastern tip of the Sakhalind Island as incedental bycatch in the Greenland halibut Reinhardtius hippoglossoides fishery at the depths of between 612–670 m has been reported. The Smith’s fish-body fork length varied in the range of 34–87 cm (69.6 ± 0.3 cm, on average). The catch composition was based on the specimens of 66.1–74.0 cm in length (69.7%). The spawning site of larva occurrence is probably located northward from the Sakhalin Island.
{"title":"On Case of Bulk Harvesting the Shortraker Rockfish Sebastes borealis (Sebastidae) in Sea of Okhotsk off Northeastern Tip of Sakhalin Island","authors":"Yu. N. Poltev, A. V. Luchenkov","doi":"10.1134/s0032945224020103","DOIUrl":"https://doi.org/10.1134/s0032945224020103","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">\u0000<b>Abstract</b>—</h3><p>A case of bulk harvesting the shortraker rockfish <i>Sebastes borealis</i> in the water masses off the northeastern tip of the Sakhalind Island as incedental bycatch in the Greenland halibut <i>Reinhardtius hippoglossoides</i> fishery at the depths of between 612–670 m has been reported. The Smith’s fish-body fork length varied in the range of 34–87 cm (69.6 ± 0.3 cm, on average). The catch composition was based on the specimens of 66.1–74.0 cm in length (69.7%). The spawning site of larva occurrence is probably located northward from the Sakhalin Island.</p>","PeriodicalId":48537,"journal":{"name":"Journal of Ichthyology","volume":"16 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2024-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140941215","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 : 2024-03-27DOI: 10.1134/s0032945224700061
W. Hmila, W. Khoufi, A. Abdaoui, K. Mahé, C. Jabeur
Abstract
Growth parameters of any species are fundamental for eco-biological and dynamic studies. Since the quality of these parameters’ estimations affect species stock assessment directly, growth analysis should be improved. Many functions are used for growth modeling, but the most commonly used model in marine stock assessment is the von Bertalanffy growth function. In order to enhance the estimation of growth parameters of Pomatomus saltatrix (Linnaeus, 1766), the von Bertalanffy growth function was determined via the Markov Chain Monte Carlo. In total, 288 individuals (158 females, 103 males, and 27 with undetermined sex) were collected during 12 months, from July 2020 to June 2021, along the eastern coast of Tunisia in the Mediterranean Sea (Monastir, Sousse and Mahdia). The individual ageing data was obtained from the examination of whole sagittal otoliths with binoculars under reflected light. The length–weight relationships (total weight (TW) ± 0.01 g; total length (TL) ± 0.1 cm) were TW = 0.011 × TL2.974 (r2 = 0.952, p < 0.05) for females, TW = 0.014 × TL2.897(r2 = 0.926, p < 0.05) for males and TW = 0.093 × TL2.205 (r2 = 0.819, p < 0.05) for undetermined sex. The adjusted with the Markov Chain Monte Carlo von Bertalanffy growth parameters were TL∞ = 31.63 ± 1.32 cm, K = 0.46 ± 0.04 year–1 for females and TL∞ = 30.33 ± 1.31 cm, K = 0.49 ± 0.05 year–1 for males. The gathered biological information will be useful for an ulterior stock assessment and fishery management of P. saltatrix in Tunisian waters.
{"title":"The Growth of Pomatomus saltatrix (Pomatomidae) from the Southeastern Coast of the Mediterranean Sea","authors":"W. Hmila, W. Khoufi, A. Abdaoui, K. Mahé, C. Jabeur","doi":"10.1134/s0032945224700061","DOIUrl":"https://doi.org/10.1134/s0032945224700061","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>Growth parameters of any species are fundamental for eco-biological and dynamic studies. Since the quality of these parameters’ estimations affect species stock assessment directly, growth analysis should be improved. Many functions are used for growth modeling, but the most commonly used model in marine stock assessment is the von Bertalanffy growth function. In order to enhance the estimation of growth parameters of <i>Pomatomus saltatrix</i> (Linnaeus, 1766), the von Bertalanffy growth function was determined via the Markov Chain Monte Carlo. In total, 288 individuals (158 females, 103 males, and 27 with undetermined sex) were collected during 12 months, from July 2020 to June 2021, along the eastern coast of Tunisia in the Mediterranean Sea (Monastir, Sousse and Mahdia). The individual ageing data was obtained from the examination of whole sagittal otoliths with binoculars under reflected light. The length–weight relationships (total weight (<i>TW</i>) ± 0.01 g; total length (<i>TL</i>) ± 0.1 cm) were <i>TW</i> = 0.011 × <i>TL</i><sup>2.974</sup> (<i>r</i><sup>2</sup> = 0.952, <i>p</i> < 0.05) for females, <i>TW</i> = 0.014 × <i>TL</i><sup>2.897</sup>(<i>r</i><sup>2</sup> = 0.926, <i>p</i> < 0.05) for males and <i>TW</i> = 0.093 × <i>TL</i><sup>2.205</sup> (<i>r</i><sup>2</sup> = 0.819, <i>p</i> < 0.05) for undetermined sex. The adjusted with the Markov Chain Monte Carlo von Bertalanffy growth parameters were <i>TL</i><sub>∞</sub> = 31.63 ± 1.32 cm, <i>K</i> = 0.46 ± 0.04 year<sup>–1</sup> for females and <i>TL</i><sub>∞</sub> = 30.33 ± 1.31 cm, <i>K</i> = 0.49 ± 0.05 year<sup>–1</sup> for males. The gathered biological information will be useful for an ulterior stock assessment and fishery management of <i>P. saltatrix</i> in Tunisian waters.</p>","PeriodicalId":48537,"journal":{"name":"Journal of Ichthyology","volume":"30 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2024-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140316187","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 : 2024-03-27DOI: 10.1134/s0032945224700073
B. T. Villarins, L. G. Fischer, J. R. Martins, M. M. Mincarone
Abstract—
This paper reports on the first record of the bristlemouth Margrethia valentinae Parin, 1982 (Stomiiformes: Gonostomatidae) in the western South Atlantic, based on a single specimen (NPM 6856, standard length 52 mm) bottom trawled off Santa Catarina, Brazil, at 26°23′25′′ S, 46°01′50′′ W, 400 m depth, on December 13, 2000. Morphometric and meristic data for M. valentinae and its congener, M. obtusirostra, are given and compared to those reported in the literature. Remarks on the taxonomy of the genus Margrethia and an overview on its distribution are also provided.
{"title":"First Record of Margrethia valentinae (Gonostomatidae) in the Western South Atlantic, with Remarks on the Taxonomy and Distribution of the Genus Margrethia","authors":"B. T. Villarins, L. G. Fischer, J. R. Martins, M. M. Mincarone","doi":"10.1134/s0032945224700073","DOIUrl":"https://doi.org/10.1134/s0032945224700073","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract—</h3><p>This paper reports on the first record of the bristlemouth <i>Margrethia valentinae</i> Parin, 1982 (Stomiiformes: Gonostomatidae) in the western South Atlantic, based on a single specimen (NPM 6856, standard length 52 mm) bottom trawled off Santa Catarina, Brazil, at 26°23′25′′ S, 46°01′50′′ W, 400 m depth, on December 13, 2000. Morphometric and meristic data for <i>M. valentinae</i> and its congener, <i>M. obtusirostra</i>, are given and compared to those reported in the literature. Remarks on the taxonomy of the genus <i>Margrethia</i> and an overview on its distribution are also provided.</p>","PeriodicalId":48537,"journal":{"name":"Journal of Ichthyology","volume":"1 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2024-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140316505","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 : 2024-03-27DOI: 10.1134/s003294522470005x
M. Giusti, M. Angiolillo, I. Consalvo, B. di Lorenzo, F. Enrichetti, M. Toma, A. Pazzini, A. Caro, L. Tunesi
Abstract
An remotely operated vehicle survey conducted in three Canyon heads of the Ligurian Sea (northwestern Mediterranean Sea) in 2022 documented the presence of the boa dragonfish, Stomias boa (Risso, 1810), belonging to the family Stomiidae. Overall, 112 specimens of this meso- and bathypelagic species were primarily observed at depths ranging from 350 to 400 m, with the highest number recorded in Bergeggi (n = 59, in a single dive). This study significantly contributes to our understanding of the behaviour of S. boa by providing novel insights, including the description of a yawn-like action. Furthermore, by utilizing data from public geodatabases and incorporating new records, an updated distribution map of S. boa in the Mediterranean Sea was generated, encompassing a total of 2266 specimens and 1443 occurrence points, indicating a widespread presence of this species throughout the Mediterranean Sea. These findings contribute to the understanding of the species abundance and behaviour to environmental stimuli in deep-sea Canyon ecosystems.
{"title":"Distribution and in vivo Observations of the Boa Dragonfish Stomias boa (Stomiidae) in Deep-Sea Canyon Ecosystems of the Northwestern Mediterranean Sea","authors":"M. Giusti, M. Angiolillo, I. Consalvo, B. di Lorenzo, F. Enrichetti, M. Toma, A. Pazzini, A. Caro, L. Tunesi","doi":"10.1134/s003294522470005x","DOIUrl":"https://doi.org/10.1134/s003294522470005x","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>An remotely operated vehicle survey conducted in three Canyon heads of the Ligurian Sea (northwestern Mediterranean Sea) in 2022 documented the presence of the boa dragonfish, <i>Stomias boa</i> (Risso, 1810), belonging to the family Stomiidae. Overall, 112 specimens of this meso- and bathypelagic species were primarily observed at depths ranging from 350 to 400 m, with the highest number recorded in Bergeggi (<i>n</i> = 59, in a single dive). This study significantly contributes to our understanding of the behaviour of <i>S. boa</i> by providing novel insights, including the description of a yawn-like action. Furthermore, by utilizing data from public geodatabases and incorporating new records, an updated distribution map of <i>S. boa</i> in the Mediterranean Sea was generated, encompassing a total of 2266 specimens and 1443 occurrence points, indicating a widespread presence of this species throughout the Mediterranean Sea. These findings contribute to the understanding of the species abundance and behaviour to environmental stimuli in deep-sea Canyon ecosystems.</p>","PeriodicalId":48537,"journal":{"name":"Journal of Ichthyology","volume":"44 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2024-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140316186","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 : 2024-03-27DOI: 10.1134/s0032945224700036
F. Gallo-Cardozo, M. Maldonado, M. Careaga, F. M. Carvajal-Vallejos
Abstract
A new species of piranha, in the genus Serrasalmus (Characiformes, Serrasalmidae), is described from tributaries of the upper Madeira River drainage (Bolivian Amazon Basin). This new species exhibits a similar caudal-fin color like that observed in S. hollandi, and review of the literature suggested that former studies have misidentified these two species. The new species can be diagnosed morphologically from other congeners, but genetic variation of the COI sequence data showed little difference (~1%) from similar, morphologically recognized species. Since Serrasalmus species are widespread and morphologically difficult to identify, a key for identifying Bolivian species of this genus is presented.
摘要：本文描述了马德拉河上游支流（玻利维亚亚马逊河流域）中的一种食人鱼新种，该种食人鱼属于Serrasalmus属（鱼形目，Serrasalmidae）。该新物种的尾鳍颜色与 S. hollandi 的尾鳍颜色相似。从形态上看，该新种可与其他同系物种相鉴别，但 COI 序列数据的遗传变异显示，该新种与形态学上公认的相似物种差异很小（约 1%）。由于 Serrasalmus 物种分布广泛，且形态上难以识别，因此本文提出了一个识别该属玻利维亚种的关键方法。
{"title":"A New Species of Piranha (Serrasalmus, Serrasalmidae) from the Upper Madeira River System, Amazon Basin, Bolivia","authors":"F. Gallo-Cardozo, M. Maldonado, M. Careaga, F. M. Carvajal-Vallejos","doi":"10.1134/s0032945224700036","DOIUrl":"https://doi.org/10.1134/s0032945224700036","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>A new species of piranha, in the genus <i>Serrasalmus</i> (Characiformes, Serrasalmidae), is described from tributaries of the upper Madeira River drainage (Bolivian Amazon Basin). This new species exhibits a similar caudal-fin color like that observed in <i>S. hollandi</i>, and review of the literature suggested that former studies have misidentified these two species. The new species can be diagnosed morphologically from other congeners, but genetic variation of the <i>COI</i> sequence data showed little difference (~1%) from similar, morphologically recognized species. Since <i>Serrasalmus</i> species are widespread and morphologically difficult to identify, a key for identifying Bolivian species of this genus is presented.</p>","PeriodicalId":48537,"journal":{"name":"Journal of Ichthyology","volume":"1 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2024-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140316442","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 : 2024-03-27DOI: 10.1134/s0032945224700048
T. V. Gavruseva, T. B. Sigacheva
Abstract
The aim of the present study was to conduct the comparative analysis of the set of biochemical and histopathological parameters of the goby Neogobius melanostomus (Pallas, 1814) and the knout goby Mesogobius batrachocephalus (Pallas, 1814) collected from Apollonova Bay (the Black Sea, Sevastopol). The biochemical analyses performed in the tissues of two fish species revealed shifting in the prooxidant-antioxidant reactions towards the lipid peroxidation processes in liver, illustrated decreased activity of alanine aminotransferase and alkaline phosphatase in the organ and its increase in serum of the round goby, thus showing more pronounced oxidative damages of hepatocytes as compared to the knout goby and was confirmed histologically. Necrosis of single hepatocytes was detected in 44.44% of the round goby in contrast to 28% in the knout goby. The histopathological studies of gills, kidneys and liver revealed 22 alterations in the round goby and 18 in the knout goby, that belonged to five types of patterns: circulatory disorders, inflammatory reactions, progressive and regressive changes, benign tumours. In liver (lipoid vacuolization of hepatocytes) and kidney (vacuolization and hyaline-droplet degeneration of nephrocytes, nephrocalcinosis, local necrosis of the renal tubules) regressive changes dominated and were registered as much more common for the round goby. The most histopathological lesions in gobies’ gills (hyperplasia of the respiratory epithelium and fusion of the gill lamellae) were found progressive and related to the compensatory-adaptive reactions. Thus, the obtained results indicate a moderate chronic toxic effects of contaminants on fish in Apollonova Bay, and testify greater sensitivity of the round goby to the level of mixed pollution /Cu content in this water body, and hence make it more preferable for biodiagnostics throughout the water regions. Based on our researches, we can recommend the joint application of biochemical and histopathological parameters of two goby species to ensure the correct interpretation in bioindication studies.
{"title":"Comparative Study of Biochemical and Histopathological Parameters of Two Black Sea Goby Species","authors":"T. V. Gavruseva, T. B. Sigacheva","doi":"10.1134/s0032945224700048","DOIUrl":"https://doi.org/10.1134/s0032945224700048","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The aim of the present study was to conduct the comparative analysis of the set of biochemical and histopathological parameters of the goby <i>Neogobius melanostomus</i> (Pallas, 1814) and the knout goby <i>Mesogobius batrachocephalus</i> (Pallas, 1814) collected from Apollonova Bay (the Black Sea, Sevastopol). The biochemical analyses performed in the tissues of two fish species revealed shifting in the prooxidant-antioxidant reactions towards the lipid peroxidation processes in liver, illustrated decreased activity of alanine aminotransferase and alkaline phosphatase in the organ and its increase in serum of the round goby, thus showing more pronounced oxidative damages of hepatocytes as compared to the knout goby and was confirmed histologically. Necrosis of single hepatocytes was detected in 44.44% of the round goby in contrast to 28% in the knout goby. The histopathological studies of gills, kidneys and liver revealed 22 alterations in the round goby and 18 in the knout goby, that belonged to five types of patterns: circulatory disorders, inflammatory reactions, progressive and regressive changes, benign tumours. In liver (lipoid vacuolization of hepatocytes) and kidney (vacuolization and hyaline-droplet degeneration of nephrocytes, nephrocalcinosis, local necrosis of the renal tubules) regressive changes dominated and were registered as much more common for the round goby. The most histopathological lesions in gobies’ gills (hyperplasia of the respiratory epithelium and fusion of the gill lamellae) were found progressive and related to the compensatory-adaptive reactions. Thus, the obtained results indicate a moderate chronic toxic effects of contaminants on fish in Apollonova Bay, and testify greater sensitivity of the round goby to the level of mixed pollution /Cu content in this water body, and hence make it more preferable for biodiagnostics throughout the water regions. Based on our researches, we can recommend the joint application of biochemical and histopathological parameters of two goby species to ensure the correct interpretation in bioindication studies.</p>","PeriodicalId":48537,"journal":{"name":"Journal of Ichthyology","volume":"136 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2024-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140316091","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 : 2024-03-27DOI: 10.1134/s0032945224700012
C. Assis, P. N. Coelho, T. de F. Ramos Guimarães, K. L. Souza, W. R. Ferreira, L. Marcon, J. A. Dergam
Abstract
Serrasalmus brandtii is native from the São Francisco River Basin. However, this species has been introduced in numerous other watersheds. Here we report the first occurrences of S. brandtii and its dispersal in the Doce River Basin, in southeastern Brazil. In addition, we discuss the possible impacts of the species on native fish assemblages of this region. The individuals were captured during four years of aquatic biodiversity monitoring (2018–2022) after the Fundão mining ore tailing collapse in 2015. Data from SpeciesLink and literature were used to complement the dispersal history in the Doce River Basin. Our results show that the species occurred in nine localities in the lower portion of the watershed. The first record occurred in 1987, in the Santa Maria do Doce River, in the State of Espírito Santo, Brazil. The establishment of S. brandtii in the watershed poses a real threat to native species, aggravating the effects of other anthropogenic impacts.
摘要Serrasalmus brandtii原产于圣弗朗西斯科河流域。然而，该物种已被引入其他许多流域。在此，我们报告了 S. brandtii 在巴西东南部多塞河流域的首次出现及其扩散情况。此外，我们还讨论了该物种对该地区本地鱼类可能造成的影响。这些个体是在 2015 年 Fundão 采矿矿石尾矿坍塌后四年（2018-2022 年）的水生生物多样性监测期间捕获的。来自 SpeciesLink 和文献的数据被用来补充多塞河流域的扩散历史。我们的结果显示，该物种出现在流域下游的九个地方。第一个记录出现在1987年巴西圣埃斯皮里图州的圣玛丽亚多斯河（Santa Maria do Doce River）。S.brandtii在该流域的出现对本地物种构成了真正的威胁，加剧了其他人为影响的后果。
{"title":"The Dispersal of the White Piranha, Serrasalmus brandtii (Serrasalmidae), a Non-Native Predator in the Doce River Basin, Southeastern Brazil","authors":"C. Assis, P. N. Coelho, T. de F. Ramos Guimarães, K. L. Souza, W. R. Ferreira, L. Marcon, J. A. Dergam","doi":"10.1134/s0032945224700012","DOIUrl":"https://doi.org/10.1134/s0032945224700012","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p><i>Serrasalmus brandtii</i> is native from the São Francisco River Basin. However, this species has been introduced in numerous other watersheds. Here we report the first occurrences of <i>S. brandtii</i> and its dispersal in the Doce River Basin, in southeastern Brazil. In addition, we discuss the possible impacts of the species on native fish assemblages of this region. The individuals were captured during four years of aquatic biodiversity monitoring (2018–2022) after the Fundão mining ore tailing collapse in 2015. Data from SpeciesLink and literature were used to complement the dispersal history in the Doce River Basin. Our results show that the species occurred in nine localities in the lower portion of the watershed. The first record occurred in 1987, in the Santa Maria do Doce River, in the State of Espírito Santo, Brazil. The establishment of <i>S. brandtii</i> in the watershed poses a real threat to native species, aggravating the effects of other anthropogenic impacts.</p>","PeriodicalId":48537,"journal":{"name":"Journal of Ichthyology","volume":"217 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2024-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140316251","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 : 2024-03-27DOI: 10.1134/s0032945224700024
C. A. Fernandes, L. C. Balini, M. M. de Rossi Vieira
Abstract
Cytogenetic studies in Sturisoma are rare; this genus had 11 valid species distributed in basins in South America. In this article, we aimed to expand on the cytogenetic data available for Sturisoma, contributing to the record of the karyotype and other chromosomal characteristics of both minor and major ribosomal DNA of S. barbatum from the upper Paraguay River basin. This population had diploid chromosome number 66, a karyotype composed of 20 metacentric, 14 submetacentric, 14 subtelocentric, and 18 acrocentric chromosomes, and a fundamental number of 114 for both sexes. Heterochromatic regions were observed in the short arms of the nucleolus organizer regions (NOR)-bearing chromosome pair. Fluorescence in situ hybridization revealed a single 18S site and multiple 5S ribosomal DNA sites. Data from NORs confirmed the tendency of this family to present simple NORs sites, as well as multiple sites of 5S ribosomal DNA. Pericentric inversions (or other types of centromeric shift) and/or deletions appear essential in the karyotype evolution and differentiation among S. barbatum. The present data are valuable to help in understanding karyotypic evolution in Loricariidae.
摘要对Sturisoma的细胞遗传学研究很少见；该属有11个有效种，分布在南美洲的盆地中。在本文中，我们旨在扩充现有的 Sturisoma 细胞遗传学数据，为记录巴拉圭河上游流域 S. barbatum 的核型及其他染色体特征、小核糖体 DNA 和大核糖体 DNA 做出贡献。该种群的二倍体染色体数为 66，核型由 20 条元中心染色体、14 条亚元中心染色体、14 条次中心染色体和 18 条尖中心染色体组成，雌雄个体的基数均为 114。在含核仁组织区（NOR）的染色体对的短臂上观察到异色区。荧光原位杂交显示了一个 18S 位点和多个 5S 核糖体 DNA 位点。来自 NORs 的数据证实，该家族倾向于出现简单的 NORs 位点以及多个 5S 核糖体 DNA 位点。核周倒位（或其他类型的向心性偏移）和/或缺失似乎是 S. barbatum 核型进化和分化的关键。本研究数据对了解蝙蝠科动物的核型进化很有价值。
{"title":"Cytogenetic Analysis of Sturisoma barbatum (Loricariidae): New Inferences about Karyotypic Diversification of Sturisoma","authors":"C. A. Fernandes, L. C. Balini, M. M. de Rossi Vieira","doi":"10.1134/s0032945224700024","DOIUrl":"https://doi.org/10.1134/s0032945224700024","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>Cytogenetic studies in <i>Sturisoma</i> are rare; this genus had 11 valid species distributed in basins in South America. In this article, we aimed to expand on the cytogenetic data available for <i>Sturisoma,</i> contributing to the record of the karyotype and other chromosomal characteristics of both minor and major ribosomal DNA of <i>S. barbatum</i> from the upper Paraguay River basin. This population had diploid chromosome number 66, a karyotype composed of 20 metacentric, 14 submetacentric, 14 subtelocentric, and 18 acrocentric chromosomes, and a fundamental number of 114 for both sexes. Heterochromatic regions were observed in the short arms of the nucleolus organizer regions (NOR)-bearing chromosome pair. Fluorescence <i>in situ</i> hybridization revealed a single 18S site and multiple 5S ribosomal DNA sites. Data from NORs confirmed the tendency of this family to present simple NORs sites, as well as multiple sites of 5S ribosomal DNA. Pericentric inversions (or other types of centromeric shift) and/or deletions appear essential in the karyotype evolution and differentiation among <i>S. barbatum</i>. The present data are valuable to help in understanding karyotypic evolution in Loricariidae.</p>","PeriodicalId":48537,"journal":{"name":"Journal of Ichthyology","volume":"40 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2024-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140316250","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 : 2024-03-25DOI: 10.1134/s0032945224010053
P. B. Mikheev
Abstract
The analysis results for morphological variability in the Lower Amur grayling Thymallus tugarinae, one of the five species of grayling fish (Thymallinae) inhabiting the Amur River basin has been reported. Overall, 16 samples of juvenile specimens of the same size class, collected in different parts of the habitat area, are analyzed. A discriminant analysis revealed high-level morphological speciation in grayling fish from different rivers, based on the classification accuracy comprising, on average, 96%. The hiatus in a range of morphological traits was revealed, when comparing certain samples. Clustering classified the grayling fish into groups considered morphologically different because of the variable habitat conditions. The fish from the rivers of the Amur River estuary area were well differed from each other by the morphotype, despite the similarity of the rivers conformed to the same comparatively small region. The graylings inhabiting different sections of a large river were more morphologically distinct, than the fish of small rivers isolated from each other. In addition, increases or shift in the limits of variations of the values of the morphological diagnostic traits of the species were revealed.
{"title":"Geographic Variability in Morphological Traits of Lower Amur Grayling Thymallus tugarinae (Salmonidae: Thymallinae)","authors":"P. B. Mikheev","doi":"10.1134/s0032945224010053","DOIUrl":"https://doi.org/10.1134/s0032945224010053","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The analysis results for morphological variability in the Lower Amur grayling <i>Thymallus tugarinae</i>, one of the five species of grayling fish (Thymallinae) inhabiting the Amur River basin has been reported. Overall, 16 samples of juvenile specimens of the same size class, collected in different parts of the habitat area, are analyzed. A discriminant analysis revealed high-level morphological speciation in grayling fish from different rivers, based on the classification accuracy comprising, on average, 96%. The hiatus in a range of morphological traits was revealed, when comparing certain samples. Clustering classified the grayling fish into groups considered morphologically different because of the variable habitat conditions. The fish from the rivers of the Amur River estuary area were well differed from each other by the morphotype, despite the similarity of the rivers conformed to the same comparatively small region. The graylings inhabiting different sections of a large river were more morphologically distinct, than the fish of small rivers isolated from each other. In addition, increases or shift in the limits of variations of the values of the morphological diagnostic traits of the species were revealed.</p>","PeriodicalId":48537,"journal":{"name":"Journal of Ichthyology","volume":"77 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2024-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140302217","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 : 2024-03-25DOI: 10.1134/s0032945224010119
K. A. Zhukova, A. V. Sogrina, N. Yu. Terpugova
Abstract—
The results of a study of the ovaries and testes of the Pacific ocean perch Sebastesalutus are presented based on the materials collected in the spring of 2019 and 2021 in the Bering Sea. Histological methods were used to accurately determine the phases of maturity and to visually identify the scale of gonad maturity. The maturity scale includes IX maturity phases for ovaries, and VI phases for testes. Females are characterized by synchronous development of larvae and their hatching; males have multiple-batch spawning. After larvae hatching, the gonads of females are transformed to the developing phase IX–III. According to the physiological state of the gonads, three groups of individuals were identified which differ in size: immature, maturing and mature, taking part in the current year spawning. The maturation of the gonads in the Pacific ocean perch begins at a fork length of 25 cm (FL), 50% of individuals became mature at a fork length of ∼30 cm, and the maturation of all fish occurs at 35 cm or more.
摘要--根据2019年和2021年春季在白令海采集的材料，介绍了对太平洋鲈鱼Sebastes alutus的卵巢和睾丸的研究结果。采用组织学方法准确确定了成熟阶段，并直观地确定了性腺成熟度。成熟度包括卵巢的 IX 成熟期和睾丸的 VI 成熟期。雌性的特点是幼虫的同步发育和孵化；雄性则是多批产卵。幼虫孵化后，雌性性腺转变为发育期 IX-III。根据性腺的生理状态，确定了三组个体，它们的大小各不相同：未成熟个体、成熟个体和参加当年产卵的成熟个体。太平洋鲈鱼的性腺在叉长 25 厘米（FL）时开始成熟，50%的个体在叉长 30 厘米时成熟，所有鱼类在叉长 35 厘米或以上时成熟。
{"title":"Gonad Maturity Stages of the Pacific Ocean Perch Sebastes alutus (Sebastidae)","authors":"K. A. Zhukova, A. V. Sogrina, N. Yu. Terpugova","doi":"10.1134/s0032945224010119","DOIUrl":"https://doi.org/10.1134/s0032945224010119","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">\u0000<b>Abstract</b>—</h3><p>The results of a study of the ovaries and testes of the Pacific ocean perch <i>Sebastes</i> <i>alutus</i> are presented based on the materials collected in the spring of 2019 and 2021 in the Bering Sea. Histological methods were used to accurately determine the phases of maturity and to visually identify the scale of gonad maturity. The maturity scale includes IX maturity phases for ovaries, and VI phases for testes. Females are characterized by synchronous development of larvae and their hatching; males have multiple-batch spawning. After larvae hatching, the gonads of females are transformed to the developing phase IX–III. According to the physiological state of the gonads, three groups of individuals were identified which differ in size: immature, maturing and mature, taking part in the current year spawning. The maturation of the gonads in the Pacific ocean perch begins at a fork length of 25 cm (<i>FL</i>), 50% of individuals became mature at a fork length of ∼30 cm, and the maturation of all fish occurs at 35 cm or more.</p>","PeriodicalId":48537,"journal":{"name":"Journal of Ichthyology","volume":"27 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2024-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140302089","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}
扫码关注我们
求助内容：
应助结果提醒方式：
京公网安备 11010802042870号