Bañón Rafael, Almón Bruno, Rábade Sonia, Ríos María Berta, de Carlos Alejandro
Servizo de Planificación, Consellería do Mar, Xunta de Galicia, Rúa dos Irmandiños s/n, 15701 Santiago de Compostela, Spain.
Grupo de Estudo do Medio Mariño (GEMM), Edif. Club Naútico Bajo, 15960 Ribeira, Spain.
Biology (Basel). 2023 Feb 22;12(3):349. doi: 10.3390/biology12030349.
One specimen of the duckbill barracudina of 402 mm TL was caught in a shallow coastal area in Galician waters, northwest of Spain. Morphometric and meristic parameters along with DNA barcoding, based on cytochrome c oxidase subunit I, were used to confirm the specimen identity. Neighbor-joining analysis of nominal sequences of the genus obtained from the Barcode of Life Data System indicates the presence of six representative groupings of potential species, in contrast to the three that are currently recognized as valid. The stomach contents showed remains of digested crustaceans, tentatively identified as Euphausiids. Histological examination of the gonads revealed the specimen to be an immature female with oocytes at the primary growth stage, indicative of a lack of hermaphroditism. The results add new biological and taxonomic data that contribute to improved understanding of these poorly characterized, mainly deep-water species, demonstrating, once again, the effectiveness of DNA barcoding for identifying deep-sea fishes and characterizing their genetic differences.
在西班牙西北部加利西亚海域的一个浅海沿岸区域捕获了一条全长402毫米的鸭嘴狗母鱼标本。基于细胞色素c氧化酶亚基I的形态测量和可数性状参数以及DNA条形码技术被用于确认该标本的身份。从生命条形码数据系统获得的该属名义序列的邻接法分析表明存在六个潜在物种的代表性分组，这与目前被认可为有效的三个物种形成对比。胃内容物显示有已消化的甲壳类动物残骸，初步鉴定为磷虾类。性腺的组织学检查表明该标本是一个处于初级生长阶段卵母细胞的未成熟雌性，这表明不存在雌雄同体现象。这些结果增添了新的生物学和分类学数据，有助于更好地了解这些特征描述不足的主要为深水物种，再次证明了DNA条形码技术在识别深海鱼类及其遗传差异特征方面的有效性。
