Molecular Markers Reveal a New and Possibly Threatened Species of Cnesterodon (Poeciliidae, Cnesterodontini) from the Upper Paraná River Basin, Brazil.

IF 1.4 4区生物学 Q4 DEVELOPMENTAL BIOLOGY Zebrafish Pub Date : 2023-02-01 Epub Date: 2023-01-25 DOI:10.1089/zeb.2022.0052

João Paulo Morais-Silva, Bárbara Scorsim, Geovana Gonçalves, Augusto Frota, Weferson Júnio da Graça, Alessandra Valéria de Oliveira

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Abstract

Cnesterodon comprises 10 valid species occurring in the major river basins of South America. Recent ichthyofaunistic studies in the Ivaí River basin, upper Paraná River system, suggested the existence of a possible new species, which was identified as Cnesterodon sp. based on morphological characters. Currently, the use of molecular tools has proved to be fundamental in aiding phylogenetics and cataloging biodiversity; therefore, in this study, we molecularly characterize a possible new species of Cnesterodon from the Ivaí River basin encoding the mitochondrial genes Cytochrome c Oxidase, subunit I (COI), and NADH dehydrogenase subunit 2 (ND2). The genetic differences found showed that this species really differs from the other Cnesterodon species, indicating that it is a distinct species, which is possibly already in serious danger of extinction since its habitat often suffers from human exploitation and its distribution is restricted to only two sites in the upper Ivaí River basin, but it has disappeared in one of them.

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分子标记揭示了巴西巴拉那河上游流域一种可能濒临灭绝的 Cnesterodon（Poeciliidae，Cnesterodontini）新物种。

Cnesterodon包括10个有效物种，分布于南美洲的主要河流流域。最近在巴拉那河上游伊瓦伊河流域进行的鱼类学研究表明可能存在一个新物种，根据形态特征将其鉴定为 Cnesterodon sp.。目前，分子工具的使用已被证明是辅助系统发生学和生物多样性编目的基础；因此，在本研究中，我们通过编码线粒体基因细胞色素 c 氧化酶亚基 I（COI）和 NADH 脱氢酶亚基 2（ND2），对伊瓦伊河流域可能存在的 Cnesterodon 新物种进行了分子鉴定。发现的遗传差异表明，该物种确实不同于其他 Cnesterodon 物种，表明它是一个独特的物种，可能已经面临灭绝的严重危险，因为其栖息地经常遭受人类开发，其分布仅限于伊瓦伊河流域上游的两个地点，但在其中一个地点已经消失。

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来源期刊

Zebrafish DEVELOPMENTAL BIOLOGY-ZOOLOGY

CiteScore

3.60

自引率

5.00%

发文量

审稿时长

3 months

期刊介绍： Zebrafish is the only peer-reviewed journal dedicated to the central role of zebrafish and other aquarium species as models for the study of vertebrate development, evolution, toxicology, and human disease. Due to its prolific reproduction and the external development of the transparent embryo, the zebrafish is a prime model for genetic and developmental studies. While genetically more distant from humans, the vertebrate zebrafish nevertheless has comparable organs and tissues, such as heart, kidney, pancreas, bones, and cartilage. Zebrafish introduced the new section TechnoFish, which highlights these innovations for the general zebrafish community. TechnoFish features two types of articles: TechnoFish Previews: Important, generally useful technical advances or valuable transgenic lines TechnoFish Methods: Brief descriptions of new methods, reagents, or transgenic lines that will be of widespread use in the zebrafish community Zebrafish coverage includes: Comparative genomics and evolution Molecular/cellular mechanisms of cell growth Genetic analysis of embryogenesis and disease Toxicological and infectious disease models Models for neurological disorders and aging New methods, tools, and experimental approaches Zebrafish also includes research with other aquarium species such as medaka, Fugu, and Xiphophorus.