Ichthyological Research最新文献

{"title":"Occurrence of the white-spotted charr Salvelinus leucomaenis in Lake Biwa, central Japan","authors":"Daisuke Ishizaki, Takeshi Kikko","doi":"10.1007/s10228-024-00983-z","DOIUrl":"https://doi.org/10.1007/s10228-024-00983-z","url":null,"abstract":"<p>Near the southern limit of its Japanese distribution range, the white-spotted charr <i>Salvelinus leucomaenis</i> inhabits headwater tributaries of inlet rivers to Lake Biwa, Shiga Prefecture, although failing to migrate to the lake from those tributaries. Even though lower depths (&gt;30 m) of the north basin of the lake are cold throughout the year, the only salmonid inhabiting the lake is the Biwa salmon <i>Oncorhynchus</i> sp. However, between 2018 and 2021, five white-spotted charr were caught in Lake Biwa, their phenotype being characterized by large whitish spots, reminiscent of the anadromous form off northern Japan. Mitochondrial DNA Cyt <i>b</i> haplotype analysis data supported their origin as hatchery-reared specimens from Samegai Trout Farm (Shiga Prefecture), the latter having sourced white-spotted charr from several Japanese populations, including northern Japan (descending anadromous exists). Such white-spotted charr, upon release from the hatchery, may have migrated to the lake during winter, due to a retained migration instinct.</p>","PeriodicalId":13237,"journal":{"name":"Ichthyological Research","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2024-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141259674","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}

{"title":"Spawning behaviour of lake charr, Salvelinus umbla, in an Alpine Austrian stream: evolutionary insights","authors":"Kurt Pinter, Manu Esteve","doi":"10.1007/s10228-024-00977-x","DOIUrl":"https://doi.org/10.1007/s10228-024-00977-x","url":null,"abstract":"<p>Underwater cameras were used to record and describe, for the first time, the spawning behaviour of the lake charr (<i>Salvelinus umbla</i>) in an Alpine stream (Oberer Lunzer Seebach, Austria). The results were then compared with other <i>Salvelinus</i> species reported in the literature. Unlike other <i>Salvelinus</i> species, lake charr females do not perform the typical undulating behaviour intended to ventilate and distribute eggs over gravel crevices after the spawning act. This behavioural distinction reveals a different evolutionary history and supports the lake charr being conferred a species status. The <i>Salvelinus</i> species’ unique mode of spawning is discussed within an evolutionary framework.</p>","PeriodicalId":13237,"journal":{"name":"Ichthyological Research","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2024-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141259521","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}

{"title":"Obituary: Tetsuo Kuwamura (1950–2024)","authors":"Tomoki Sunobe, Yoichi Sakai","doi":"10.1007/s10228-024-00979-9","DOIUrl":"https://doi.org/10.1007/s10228-024-00979-9","url":null,"abstract":"","PeriodicalId":13237,"journal":{"name":"Ichthyological Research","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2024-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141191786","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}

{"title":"Ecomorphological diversification of the Cyprinodon species complex from Lake Chichankanab, Yucatan, Mexico","authors":"Rosalía Aguilar-Medrano, María Eugenia Vega-Cendejas","doi":"10.1007/s10228-024-00980-2","DOIUrl":"https://doi.org/10.1007/s10228-024-00980-2","url":null,"abstract":"<p>Chichankanab is a small, shallow, ⁓8,000-year-old, tropical lake where the adaptive radiation of seven sympatric <i>Cyprinodon</i> species have been described. Since the variation in size, morphology, and diet play a key role in facilitating niche partitioning, this study aims to determine if the sympatric species can be independently identified by their variation in size, morphology, and diet and to understand the role of those variables in the ongoing diversification. To fulfill our aim we gathered, from fish collections, an updated sample of the seven sympatric species and the sister species <i>Cyprinodon artifrons</i> from whom we took their size and photographs to develop geometric morphometric analyses, and collected information on their diet. According to our results, size range allows the separation of <i>Cyprinodon beltrani</i> as the largest species, geometric morphometric allows the segregation <i>C. beltrani</i>,<i> Cyprinodon simus</i>, <i>Cyprinodon suavium</i>, and <i>Cyprinodon labiosus</i>, and a morphotype of three species, <i>Cyprinodon esconditus</i>,<i> Cyprinodon verecundus</i>, and <i>Cyprinodon maya</i>, which can be segregated by body measurements and the size of the species. The diet can help to segregate <i>C. beltrani</i> herbivore, <i>C. maya</i> piscivore/omnivore, <i>C. simus</i> zooplanktivore/detritivore, <i>C. suavium</i> and <i>C. verecundus</i> carnivore/molluscivore, and <i>C. esconditus</i> and <i>C. labiosus</i> carnivores. The ongoing hybridization and the changes in the lake are driving the diversification and decrease of these species. According to our results, there is not one character that differentiated all the species, differentiation was only possible through their specific variation in one character or by a specific combination of characters. It is important to monitor and keep updating information on these evolving species since all seven are listed in the IUCN as vulnerable and near threatened, and according to official Mexican categories as in danger of extinction.</p>","PeriodicalId":13237,"journal":{"name":"Ichthyological Research","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2024-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141191802","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}

{"title":"A new species of the anchovy genus Stolephorus Lacepède 1803, and redescriptions of Stolephorus carpentariae (De Vis 1882) and Stolephorus holodon (Boulenger 1900) (Clupeiformes: Engraulidae)","authors":"Harutaka Hata, Hiroyuki Motomura","doi":"10.1007/s10228-024-00971-3","DOIUrl":"https://doi.org/10.1007/s10228-024-00971-3","url":null,"abstract":"<p><i>Stolephorus brevis</i> sp. nov., a new anchovy from New Guinea, is described, and two similar species [<i>Stolephorus carpentariae</i> (De Vis 1882) (distributed in Gulf of Papua and north coast of Australia) and <i>Stolephorus holodon</i> (Boulenger 1900) (in southeastern coast of Africa)], that have been overlooked taxonomically for more than 30 years, are redescribed. All three species can be distinguished from all other congeners by an indented preopercular margin, numerous gill rakers, and lack of predorsal scutes and distinct markings on the dorsum. The former differ from each other in several characters, including gill-raker counts, pelvic-fin length, and body depth.</p>","PeriodicalId":13237,"journal":{"name":"Ichthyological Research","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2024-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141191678","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}

{"title":"Indel variation in the mitochondrial ND5 region supports monophyly of the tribe Hippoglossoidini (sensu Vinnikov et al. 2018) within the family Pleuronectidae","authors":"Hiroaki Kurihara, Shigeru M. Shirai, Kunihiro Fujiwara, Minoru Ikeda","doi":"10.1007/s10228-024-00978-w","DOIUrl":"https://doi.org/10.1007/s10228-024-00978-w","url":null,"abstract":"<p>Indel (insertion–deletion) events observed in the genome represent irreversible mutational processes, making indel regions crucial characteristics for discussing phylogenetic relationships. The tribe Hippoglossoidini is a recently proposed taxonomic group based on the molecular phylogenetic analyses of both mitochondrial (mt) and nuclear DNA sequences. However, no synapomorphic characteristics have been identified within this tribe, either morphologically or molecularly. In the present study, we sequenced the ND5 region of mtDNA in the righteye flounder species and conducted interspecific comparisons. We found a 12 bp indel immediately upstream of the stop codon in the ND5 region. A comparative analysis of this region with outgroup species from the Paralichthyidae revealed that the indel was a unique insertion shared by the common ancestor of the Hippoglossoidini species, providing irreversible evidence to support the monophyly of this taxonomic group (synapomorphic characters).</p>","PeriodicalId":13237,"journal":{"name":"Ichthyological Research","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2024-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141147580","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}

{"title":"Chimaera stellata, a new species described from the northwestern Pacific Ocean, with the redescription of Chimaera owstoni Tanaka 1905 (Chondrichthyes: Chimaeridae)","authors":"A. Teramura, H. Senou, S. Hirase","doi":"10.1007/s10228-024-00973-1","DOIUrl":"https://doi.org/10.1007/s10228-024-00973-1","url":null,"abstract":"","PeriodicalId":13237,"journal":{"name":"Ichthyological Research","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2024-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141100739","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}

{"title":"Redigobius fotuno, a new limnetic goby from Muna Island, Indonesia (Teleostei: Gobiidae)","authors":"Hirozumi Kobayashi, Bayu K. A. Sumarto, Daniel F. Mokodongan, Sjamsu A. Lawelle, Kawilarang W. A. Masengi, Kazunori Yamahira","doi":"10.1007/s10228-024-00958-0","DOIUrl":"https://doi.org/10.1007/s10228-024-00958-0","url":null,"abstract":"<p><i>Redigobius fotuno</i> sp. nov., described from a limestone sinkhole on Muna Island, Southeastern Sulawesi, Indonesia, is most similar to <i>Redigobius penango</i> (Popta 1922), endemic to the Sulawesi mainland, both species having a robust body and rounded head, reticular body color pattern, and longitudinal suborbital papillae rows. However, the new species is distinguished from the latter in having greater head length (35.3–38.4% of standard length [SL]), upper jaw length (14.7–20.0% of SL) and predorsal length (43.4–46.0% of SL), and a slender pelvic disc with thin frenum (length: 21.7–26.2% of SL; base width: 4.2–6.3% of SL). These unique morphological characters of <i>R. fotuno</i> sp. nov. may be related to the limnetic habitat of the species.</p>","PeriodicalId":13237,"journal":{"name":"Ichthyological Research","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2024-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140927063","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}

{"title":"Habitat segregation by sympatric juvenile Arctic charr and brown trout in shallow lake areas: a consequence of interspecific differences in predator avoidance?","authors":"Martin-A. Svenning, Audun Stien, Reidar Borgstrøm","doi":"10.1007/s10228-024-00974-0","DOIUrl":"https://doi.org/10.1007/s10228-024-00974-0","url":null,"abstract":"<p>In sympatry, juvenile brown trout (<i>Salmo trutta</i>) usually occupy the shallow and most productive areas (littoral zone) of lakes, while juveniles of Arctic charr (<i>Salvelinus alpinus</i>) are found in deeper, less productive parts. In contrast, when Arctic charr juveniles occur in allopatry, they often occupy shallow littoral areas as well. Habitat segregation has traditionally been interpreted as a trade-off between predation risk and energy gain, while the segregation of these two species has been explained by brown trout being more aggressive and competitively superior to Arctic charr. We hypothesize, however, that the marked habitat segregation between the two species may also be due to differences in predator avoidance. Accordingly, we conducted several laboratory tests, using Arctic charr and brown trout as potential predators. Live fish of the same species were offered as prey, either as small charr only, small trout only, or both small charr and small trout together. Artificial shelters were then introduced to examine the avoidance ability of prey fish against predatory fish. Our results showed that under these circumstances, access to shelters strongly decreased mortality in juvenile brown trout, but had no effect on juvenile Arctic charr mortality. Thus, the habitat segregation shown by sympatric juvenile Arctic charr and brown trout in lakes may be a consequence of interspecific differences in predator avoidance.</p>","PeriodicalId":13237,"journal":{"name":"Ichthyological Research","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2024-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140888962","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}

{"title":"Rediscovery of Oryzias hubbsi with notes on its reproductive isolation with O. javanicus","authors":"Daniel F. Mokodongan, Ilham V. Utama, Atsushi J. Nagano, Sau Pinn Woo, Shau Hwai Tan, Satoshi Ansai, Yusuke Takehana, Kazunori Yamahira","doi":"10.1007/s10228-024-00976-y","DOIUrl":"https://doi.org/10.1007/s10228-024-00976-y","url":null,"abstract":"<p><i>Oryzias hubbsi</i> Roberts 1998 is a miniature species of adrianichthyid (medaka). It was described based on a laboratory stock bred from individuals collected in the field in 1983. No individuals of this species have been collected in the field since then. Mitochondrial haplotyping revealed that individuals collected from a fishing pond at Tangerang, west of Jakarta, were <i>Oryzias javanicus</i> (Bleeker 1854), a closely related common species widely distributed throughout the Sunda Islands, as well as <i>O. hubbsi</i>. Phylogenetic network and population genetic structure analyses on the basis of genome-wide single-nucleotide polymorphisms revealed that <i>O. hubbsi</i> and <i>O. javanicus</i> individuals are clearly separated from each other, indicating that they do not hybridize. Morphometric and meristic characters of the newly discovered <i>O. hubbsi</i> individuals were consistent with those of previous studies. We discussed the reasons for the lack of reports of <i>O. hubbsi</i> since the 1980s and the mechanisms of reproductive isolation between <i>O. hubbsi</i> and <i>O. javanicus</i>. </p>","PeriodicalId":13237,"journal":{"name":"Ichthyological Research","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2024-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140888884","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}