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A new and threatened species of internally inseminating seasonal killifish of Campellolebias (Cyprinodontiformes: Rivulidae) endemic to a continental island in the Atlantic Forest, Southern Brazil
IF 1.2 3区 生物学
Zoologischer Anzeiger Pub Date : 2025-03-26 DOI: 10.1016/j.jcz.2025.03.004
Matheus Vieira Volcan , Daiana Kaster Garcez , Lizandra Jaqueline Robe , Caio Roberto Magagnin Feltrin , Wilson José Eduardo Moreira Costa , Luis Esteban Krause Lanés
{"title":"A new and threatened species of internally inseminating seasonal killifish of Campellolebias (Cyprinodontiformes: Rivulidae) endemic to a continental island in the Atlantic Forest, Southern Brazil","authors":"Matheus Vieira Volcan ,&nbsp;Daiana Kaster Garcez ,&nbsp;Lizandra Jaqueline Robe ,&nbsp;Caio Roberto Magagnin Feltrin ,&nbsp;Wilson José Eduardo Moreira Costa ,&nbsp;Luis Esteban Krause Lanés","doi":"10.1016/j.jcz.2025.03.004","DOIUrl":"10.1016/j.jcz.2025.03.004","url":null,"abstract":"<div><div><em>Campellolebias</em> comprises small internally inseminating seasonal fishes that inhabit temporary pools in tropical and subtropical areas of the Atlantic Forest. It currently encompasses four species. Integrative taxonomy was used here to investigate a possible new species found in the island of Florianópolis, southern Brazil. The examined material confirm that it pertains to a new species. Furthermore, minimum genetic distances found between this and other species of <em>Campellolebias</em> regarding mitochondrial markers were higher than 3 %. This new species is distinguished from all other species of <em>Campellolebias</em> by the combination of a series of character states, including the color pattern in both sexes, pelvic-fin bases separated by an interspace, pelvic-fin tips reaching base of the 1st anal-fin ray in males and the urogenital papilla in females, by possessing 1–2+24-29 infraorbital neuromasts, 2–4 otic neuromasts, and by the anal-fin origin being positioned at a vertical between the base of the 4th and 6th dorsal-fin ray in females. <em>Campellolebias insularis,</em> new species, occurs exclusively in small temporary wetlands in areas under strong threat due to real estate development, in the island of Florianópolis. Due to the advanced stage of habitat loss and degradation, its restricted distribution area, and the reduced populations sizes, the species is considered Critically Endangered. Additionally, comments are provided on the putative relationships of the new species, its conservation status, and an identification key for the species of <em>Campellolebias</em>.</div></div>","PeriodicalId":49332,"journal":{"name":"Zoologischer Anzeiger","volume":"316 ","pages":"Pages 75-84"},"PeriodicalIF":1.2,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143725386","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Chimalfus and Liracoxa (Coleoptera: Staphylinidae: Staphylininae), two new genera from southern south America with a geometric morphometric evaluation of head and pronotal chaetotaxy
IF 1.2 3区 生物学
Zoologischer Anzeiger Pub Date : 2025-03-14 DOI: 10.1016/j.jcz.2025.03.002
Anna Reinhold Larsen , Alexey Solodovnikov , José L. Reyes-Hernández
{"title":"Chimalfus and Liracoxa (Coleoptera: Staphylinidae: Staphylininae), two new genera from southern south America with a geometric morphometric evaluation of head and pronotal chaetotaxy","authors":"Anna Reinhold Larsen ,&nbsp;Alexey Solodovnikov ,&nbsp;José L. Reyes-Hernández","doi":"10.1016/j.jcz.2025.03.002","DOIUrl":"10.1016/j.jcz.2025.03.002","url":null,"abstract":"<div><div>Based on the ongoing phylogenetic study of the subtribe Amblyopinina, two new genera are described, <em>Chimalfus</em> <strong>gen. nov.</strong> and <em>Liracoxa</em> <strong>gen. nov.</strong> to accommodate three species earlier misplaced in the genus <em>Sphingoquedius</em>. The resulting new combinations are <em>Chimalfus brevis</em> (Sáiz, 1971) <strong>comb. nov.</strong>, <em>Chimalfus discoideus</em> (Fairmaire and Germain, 1862) <strong>comb. nov.</strong>, and <em>Liracoxa nana</em> (Sáiz, 1971) <strong>comb. nov.</strong> Furthermore, a new species, <em>Chimalfus brunneus</em> <strong>sp. nov.</strong>, is described. For each species, taxonomic descriptions, illustrations, distributions, and bionomics are provided. Geometric morphometric analysis identified morphologically significant traits for the delimitation of all revised and new species. Principal Component Analysis (PCA) and procrustes ANOVA offered an effective overview of all traits, highlighting key morphological characters for species delimitation. The analyses revealed that the chaetotaxy of the head and pronotum was significant for species delimitation. This knowledge, as well as the methodical workflow employed in this study, may be applied in future taxonomic work in the more species-rich genera of Amblyopinina.</div></div>","PeriodicalId":49332,"journal":{"name":"Zoologischer Anzeiger","volume":"316 ","pages":"Pages 85-96"},"PeriodicalIF":1.2,"publicationDate":"2025-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143734683","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Clam fishing along 1300 km Chilean coastline: A morphometric and genetic survey of Mulinia edulis King, 1832
IF 1.2 3区 生物学
Zoologischer Anzeiger Pub Date : 2025-03-04 DOI: 10.1016/j.jcz.2025.03.001
Doris Oliva , Valentina Salgado , Hugo A. Benítez , Alejandro Abarca , L. René Durán , Anahi Canto , Camila Barría , Marcela P. Astorga
{"title":"Clam fishing along 1300 km Chilean coastline: A morphometric and genetic survey of Mulinia edulis King, 1832","authors":"Doris Oliva ,&nbsp;Valentina Salgado ,&nbsp;Hugo A. Benítez ,&nbsp;Alejandro Abarca ,&nbsp;L. René Durán ,&nbsp;Anahi Canto ,&nbsp;Camila Barría ,&nbsp;Marcela P. Astorga","doi":"10.1016/j.jcz.2025.03.001","DOIUrl":"10.1016/j.jcz.2025.03.001","url":null,"abstract":"<div><div><em>Mulinia edulis</em>, also known as Taquilla clam, is a fishery resource, and one of the 6 species of clams commercially exploited in Chile. Valuable advances have been made for its culture, but there is still uncertainty regarding the species associated with the main commercial banks. The hypothesis was that, if the different harvested banks of <em>M. edulis</em> correspond to a single species along the Chilean coast, when comparing individuals from the north, central and south, they should not present significant morphological differences in their valves. The aim of this paper is to analyze and compare the morphology of <em>M. edulis</em> valves using geometric morphology and genetic comparison by sequencing the mitochondrial gene Cytochrome oxidase I and 16S RNA gene. Samples were obtained in three main fishery grounds, Tongoy Bay (northern), Arauco Gulf (central) and Ancud Bay (southern). In the inner side of the right valve 28 morphological landmarks were set, using TPS Util and R package geomorph, landmarks settings were overlaid through the generalized Procrustes analysis. Principal Components Analysis (PCA), using residuals were conducted among locations and sex. The results show no in-fluence of size or sex on shape of the valves. Through PCA analysis banks were differentiated by their shape. Abductor muscle and pallial sinus show the most relevant differences, especially when comparing northern and southern clams, where Arauco Gulf shows an intermediate morph. The three localities show low genetic diversity and little differentiation between them. This finding suggests that the fishery of taquilla clam is sustained only by <em>M. edulis</em>.</div></div>","PeriodicalId":49332,"journal":{"name":"Zoologischer Anzeiger","volume":"316 ","pages":"Pages 27-34"},"PeriodicalIF":1.2,"publicationDate":"2025-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143594080","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Larval chaetotaxy and morphometry of Coelostomatini and Sphaeridiini (Coleoptera: Hydrophilidae): Insights into terrestrial adaptations of Dactylosternum Wollaston, Hydroglobus Knisch, and Sphaeridium Fabricius
IF 1.2 3区 生物学
Zoologischer Anzeiger Pub Date : 2025-03-01 DOI: 10.1016/j.jcz.2025.02.005
Georgina Rodriguez , Miguel Archangelsky , Patricia Laura María Torres
{"title":"Larval chaetotaxy and morphometry of Coelostomatini and Sphaeridiini (Coleoptera: Hydrophilidae): Insights into terrestrial adaptations of Dactylosternum Wollaston, Hydroglobus Knisch, and Sphaeridium Fabricius","authors":"Georgina Rodriguez ,&nbsp;Miguel Archangelsky ,&nbsp;Patricia Laura María Torres","doi":"10.1016/j.jcz.2025.02.005","DOIUrl":"10.1016/j.jcz.2025.02.005","url":null,"abstract":"<div><div>This study presents a comprehensive comparative analysis of larvae from the Coelostomatini and Sphaeridiini tribes of Sphaeridiinae. The chaetotaxy of the head capsule and head appendages of larvae of <em>Dactylosternum abdominale</em> (Fabricius), <em>Dactylosternum</em> cf. <em>subrotundum</em> (Fabricius), <em>Hydroglobus puncticollis</em> (Bruch) and <em>Sphaeridium scarabaeoides</em> (Linnaeus) is described and illustrated. Morphometric characters from the head capsule and mouthparts are included, along with detailed illustrations and scanning electron microscope photographs of all characters. Morphology and chaetotaxy of these larvae are compared with those of other Sphaeridiinae. Coelostomatini revealed two distinct ecomorphotypes, terrestrial and aquatic, with adaptations reflecting their respective environments. The somatic morphology of <em>Dactylosternum</em> larvae shows convergence with those inhabiting decaying organic matter, such as Sphaeridiini and Megasternini, indicating common adaptive strategies across tribes. However, <em>Dactylosternum</em> cf. <em>subrotundum</em> shows ambiguous characteristics between terrestrial and aquatic morphotypes, suggesting a distinct adaptive strategy in terrestrial environments. No putative shared larval apomorphies were observed to support a phylogenetic relationship between <em>Hydroglobus</em> and <em>Phaenonotum</em> as close as previously assumed. Detailed comparisons among <em>Sphaeridium</em> larval instars reveal variations in chaetotaxy and morphometry of head structures and appendages.</div></div>","PeriodicalId":49332,"journal":{"name":"Zoologischer Anzeiger","volume":"316 ","pages":"Pages 1-26"},"PeriodicalIF":1.2,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143594042","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Advancing the understanding of morphological and molecular diversity of the genus Labronema Thorne, 1939 (Nematoda: Dorylaimida) with new insights into its molecular phylogeny
IF 1.2 3区 生物学
Zoologischer Anzeiger Pub Date : 2025-03-01 DOI: 10.1016/j.jcz.2025.02.003
Sergio Álvarez-Ortega
{"title":"Advancing the understanding of morphological and molecular diversity of the genus Labronema Thorne, 1939 (Nematoda: Dorylaimida) with new insights into its molecular phylogeny","authors":"Sergio Álvarez-Ortega","doi":"10.1016/j.jcz.2025.02.003","DOIUrl":"10.1016/j.jcz.2025.02.003","url":null,"abstract":"<div><div>The genus <em>Labronema</em> comprises a diverse and widely distributed group of nematodes within the order Dorylaimida. However, its taxonomy remains challenging due to significant morphological variability among species and the limited availability of molecular data. This study provides comprehensive descriptions of four known <em>Labronema</em> species, including the type species of the genus, supported by both morphological and molecular analyses. It also presents a phylogenetic assessment aimed at clarifying evolutionary relationships within the genus. Furthermore, the study incorporates a scanning electron microscopy analysis for three species and reports two species not previously recorded in Spain. Results suggest that <em>Labronema</em> is not a monophyletic taxon, identifying at least three distinct species groups. The postembryonic development of <em>Labronema stechlinensis</em> reveals significant morphological changes, offering valuable insights into the developmental biology and evolutionary morphology of these nematodes. This contribution highlights the importance of integrating morphological and molecular data to address taxonomic and phylogenetic complexities within <em>Labronema</em>.</div></div>","PeriodicalId":49332,"journal":{"name":"Zoologischer Anzeiger","volume":"315 ","pages":"Pages 105-123"},"PeriodicalIF":1.2,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143520624","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Molecular phylogeny and cryptic species identification of the genus Triplophysa in the freshwater of Malakand division, Pakistan
IF 1.2 3区 生物学
Zoologischer Anzeiger Pub Date : 2025-03-01 DOI: 10.1016/j.jcz.2025.02.006
Omer dad , Muhammad Fiaz Khan , Akhtar Rasool , Mohammad Attaullah , Muhammad Israr , Naveed Akhtar
{"title":"Molecular phylogeny and cryptic species identification of the genus Triplophysa in the freshwater of Malakand division, Pakistan","authors":"Omer dad ,&nbsp;Muhammad Fiaz Khan ,&nbsp;Akhtar Rasool ,&nbsp;Mohammad Attaullah ,&nbsp;Muhammad Israr ,&nbsp;Naveed Akhtar","doi":"10.1016/j.jcz.2025.02.006","DOIUrl":"10.1016/j.jcz.2025.02.006","url":null,"abstract":"<div><div><em>Triplophysa</em> is an ecologically and commercially important genus of freshwater fish consisting of cryptic species with uncertain taxonomic status. The current study was the first report on the molecular phylogeny of the genus <em>Triplophysa</em> in the freshwater of Malakand Division, Pakistan. The mitochondrial gene cytochrome <em>c</em> oxidase subunit I (<em>COI)</em> was used for the identification of cryptic species in the genus <em>Triplophysa</em> and for finding out the molecular phylogeny of the identified species. Fish specimens were collected, and DNA was extracted, then amplified using genes specific primers. The PCR results were sequenced, and consensus sequences were created using BioEdit software. The consensus nucleotide sequences of each <em>Triplophysa</em> species were BLAST, and each query sample showed similarities to gene bank sequences. The three species of <em>Triplophysa</em> (<em>Triplophysa microps, Triplophysa naziri,</em> and <em>Triplophysa choprai</em>) were identified, and their phylogenetic analysis was carried out using MEGA software. The mitochondrial gene sequences of the three recognized species (<em>T. naziri, T. microps,</em> and <em>T. choprai</em>) have been uploaded for the first time to the GenBank database. These findings will be an addition to the indigenous ichthyofauna of Pakistan and will act as a reference library for future studies.</div></div>","PeriodicalId":49332,"journal":{"name":"Zoologischer Anzeiger","volume":"315 ","pages":"Pages 97-104"},"PeriodicalIF":1.2,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143512466","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Four new species of the genus Pseudomesochra Scott T., 1902 (Copepoda: Harpacticoida: Pseudotachidiidae) from the deep sea of the Gulf of California and Gulf of Mexico, with proposal of a new genus and species of the subfamily Danielsseniinae Huys and Gee, 1996
IF 1.2 3区 生物学
Zoologischer Anzeiger Pub Date : 2025-02-25 DOI: 10.1016/j.jcz.2025.02.007
Samuel Gómez, Beatriz Yáñez-Rivera, Leonardo García-Vázquez
{"title":"Four new species of the genus Pseudomesochra Scott T., 1902 (Copepoda: Harpacticoida: Pseudotachidiidae) from the deep sea of the Gulf of California and Gulf of Mexico, with proposal of a new genus and species of the subfamily Danielsseniinae Huys and Gee, 1996","authors":"Samuel Gómez,&nbsp;Beatriz Yáñez-Rivera,&nbsp;Leonardo García-Vázquez","doi":"10.1016/j.jcz.2025.02.007","DOIUrl":"10.1016/j.jcz.2025.02.007","url":null,"abstract":"<div><div>The true diversity of deep-sea benthic harpacticoid copepods of the Mexican Exclusive Economic Zone (MEEZ) is far from being known. Only 27 species have been described for this region. Previous studies on the US Gulf of Mexico and in other world's ocean basins have revealed that the harpacticoid family Pseudotachidiidae Lang, 1936 is one of the most abundant and frequent harpacticoid taxa in meiofauna sediment samples. The taxonomy of the Pseudotachidiidae is still controversial and there is no consensus regarding its composition and taxonomic position, and phylogenetic relationships amongst its constituent taxa. Here we describe four new species of <em>Pseudomesochra</em> Scott T., 1902 (Pseudomesochrinae Willen, 1996), <em>P</em>. <em>bathyalis</em> sp. nov., <em>P</em>. <em>axa</em> sp. nov., <em>P</em>. <em>bathysicola</em>, and <em>P</em>. <em>bathyhabitatrix</em> sp. nov., and a new genus and new species, <em>Nuriaella mendezae</em> gen. et sp. nov. (Danielseniinae Huys and Gee, 1996) from the deep-sea of the Mexican Gulf of Mexico and Gulf of California, along with a proposal of several species groups of <em>Pseudomesochra</em>.</div></div>","PeriodicalId":49332,"journal":{"name":"Zoologischer Anzeiger","volume":"316 ","pages":"Pages 53-74"},"PeriodicalIF":1.2,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143684077","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Taxonomic revision of boreus species group of Dichotomius Hope, 1838 (Coleoptera: Scarabaeidae: Scarabaeinae: Dichotomiini), with a description of two new species from western Amazon
IF 1.2 3区 生物学
Zoologischer Anzeiger Pub Date : 2025-02-25 DOI: 10.1016/j.jcz.2025.02.008
Ana B.G. Moura , Everton E. Nazaré-Silva , Marcely C. Valois , Jorge A. Arias-Buriticá , Fernando Z. Vaz-de-Mello , Fernando A.B. Silva
{"title":"Taxonomic revision of boreus species group of Dichotomius Hope, 1838 (Coleoptera: Scarabaeidae: Scarabaeinae: Dichotomiini), with a description of two new species from western Amazon","authors":"Ana B.G. Moura ,&nbsp;Everton E. Nazaré-Silva ,&nbsp;Marcely C. Valois ,&nbsp;Jorge A. Arias-Buriticá ,&nbsp;Fernando Z. Vaz-de-Mello ,&nbsp;Fernando A.B. Silva","doi":"10.1016/j.jcz.2025.02.008","DOIUrl":"10.1016/j.jcz.2025.02.008","url":null,"abstract":"<div><div>Dung beetles play a crucial role in ecosystem functioning, particularly in the Neotropical regions. The <em>boreus</em> species group of the genus <em>Dichotomius</em> includes typical large tunneler species that often possess complex armatures on the head and pronotum. In this study, we recognize seven species within this group, mostly recorded in the Amazon region: <em>Dichotomius boreus</em> (Olivier, 1789), <em>Dichotomius pelamon</em> (Harold, 1869), <em>Dichotomius podalirius</em> (Felsche, 1901), <em>Dichotomius prietoi</em> (Martínez and Martínez, 1981), <em>Dichotomius quadrilobatus</em> (Chamorro, Lopera-Toro &amp; Rossini, 2021), <em>Dichotomius uacari</em> <strong>sp. n.</strong>, and <em>Dichotomius divisor</em> <strong>sp. n.</strong> Lectotypes are designated for <em>D. boreus</em>, <em>D. pelamon</em>, <em>D. podalirius</em>, and <em>Dichotomius carinatus</em>. A new subjective synonymy is established <em>D. carinatus</em> = <em>D. pelamon</em>. This work provides a detailed literature review, an updated identification key, descriptions, diagnoses, a list of examined material, and geographic data for each species.</div></div>","PeriodicalId":49332,"journal":{"name":"Zoologischer Anzeiger","volume":"316 ","pages":"Pages 35-52"},"PeriodicalIF":1.2,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143610006","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Molecular Discrimination of morphologically similar fishery species: The Case of Tridentiger bifasciatus and T. trigonocephalus
IF 1.2 3区 生物学
Zoologischer Anzeiger Pub Date : 2025-02-14 DOI: 10.1016/j.jcz.2025.02.004
Shaohua Chen , Yongshuang Xiao , Zhizhong Xiao , Jun Li , Angel Herrera-Ulloa
{"title":"Molecular Discrimination of morphologically similar fishery species: The Case of Tridentiger bifasciatus and T. trigonocephalus","authors":"Shaohua Chen ,&nbsp;Yongshuang Xiao ,&nbsp;Zhizhong Xiao ,&nbsp;Jun Li ,&nbsp;Angel Herrera-Ulloa","doi":"10.1016/j.jcz.2025.02.004","DOIUrl":"10.1016/j.jcz.2025.02.004","url":null,"abstract":"<div><div>Taxonomic studies demonstrated that <em>Tridentiger bifasciatus</em> and <em>Tridentiger trigonocephalus</em> were homologous species with highly analogous external morphology, which rendered them challenging to distinguish from one another. The results of species distribution modeling indicated that <em>T. bifasciatus</em> and <em>T. trigonocephalus</em> exhibited significant overlap in their distribution points and suitable habitats, primarily concentrated in areas where freshwater and saltwater converge at river mouths. This paper presented a <em>T. bifasciatus</em> and <em>T. trigonocephalus</em> species-specific marker, specific primers, applications, and a method for rapid identification in species identification to overcome the inadequacy of existing detection techniques for species identification of <em>T. bifasciatus</em> and <em>T. trigonocephalus</em>. A pair of primers could be used to amplify two DNA fragments of 497 bp and 644 bp with a difference of 147 bp in <em>T. bifasciatus</em> and <em>T. trigonocephalus</em> individuals, only a single DNA fragment of 497 bp in <em>T. bifasciatus</em> individuals and 644 bp in a <em>T. trigonocephalus</em>. The DNA of individuals of <em>T. bifasciatus</em> and <em>T. trigonocephalus</em> could be amplified and resolved by agarose gel electrophoresis, reducing the time required for the identification of <em>T. bifasciatus</em> and <em>T. trigonocephalus. Tridentiger</em> species, reducing the time required for the accurate identification of <em>T. bifasciatus</em> and <em>T. trigonocephalus</em>, and improving the efficiency of species identification detection. This method provides an efficient, rapid, and accurate identification of <em>T. bifasciatus</em> and <em>T. trigonocephalus</em> species. It is significant and valuable for accurately assessing fishery resources and conserving biodiversity of <em>T. bifasciatus</em> and <em>T. trigonocephalus</em>. Additionally, it improves knowledge of sustainable replenishment of the resources of <em>T. bifasciatus</em> and <em>T. trigonocephalus</em>.</div></div>","PeriodicalId":49332,"journal":{"name":"Zoologischer Anzeiger","volume":"315 ","pages":"Pages 89-96"},"PeriodicalIF":1.2,"publicationDate":"2025-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143487339","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Quantitative evaluation of spatial biometric parameters affecting body shape variation among three freshwater fish species
IF 1.2 3区 生物学
Zoologischer Anzeiger Pub Date : 2025-02-13 DOI: 10.1016/j.jcz.2025.02.002
Mohd Sadiq, Lubna Yasmeen, Insha Hassan, Mohammad Afzal Khan
{"title":"Quantitative evaluation of spatial biometric parameters affecting body shape variation among three freshwater fish species","authors":"Mohd Sadiq,&nbsp;Lubna Yasmeen,&nbsp;Insha Hassan,&nbsp;Mohammad Afzal Khan","doi":"10.1016/j.jcz.2025.02.002","DOIUrl":"10.1016/j.jcz.2025.02.002","url":null,"abstract":"<div><div>The biometric assessment of three freshwater fish species, <em>Mystus vittatus, Cirrhinus reba</em>, and <em>Pethia ticto,</em> was conducted on four different sampling stations along the River Ganga to analyse the body shape and growth variation. A total of 679 fish specimens were sampled, and various biometric parameters were measured and analyzed. The Linear discriminant analysis (LDA) of truss landmark distances and some morphometric characters indicated that there were significant variations in the morphometric parameters of the selected fishes across different sampling locations. The study revealed that Length–Weight relationships (LWRs) and Length–Length relationships (LLRs) were statistically significant (p &lt; 0.001) with coefficient of determination (R<sup>2</sup>) values close to 1 for all LLRs of selected fish species. Significant variations were found in growth trends and condition factors among the fish species across different sampling sites. Condition factor values for <em>M. vittatus</em> and <em>C. reba</em> were below 1 from the Kanpur and Bhagalpur sites and the condition factor values for <em>P. ticto</em> were significantly high from all sampling locations. The findings of the study provide valuable insights into the growth patterns and condition of these fish populations, essential for fisheries management, conservation efforts, and ecosystem sustainability. The study highlights the significance of biometric assessments in comprehending fish population dynamics and informing effective conservation strategies.</div></div>","PeriodicalId":49332,"journal":{"name":"Zoologischer Anzeiger","volume":"315 ","pages":"Pages 75-88"},"PeriodicalIF":1.2,"publicationDate":"2025-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143437360","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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