Devine Brynn, Van Guelpen Lou
Centre for Fisheries Ecosystems Research, Fisheries and Marine Institute of Memorial University of Newfoundland, St. John's, Newfoundland and Labrador, Canada.
Atlantic Reference Centre, Huntsman Marine Science Centre, St. Andrews, New Brunswick, Canada.
J Fish Biol. 2021 Jan;98(1):329-332. doi: 10.1111/jfb.14559. Epub 2020 Oct 7.
Two unusual adult specimens of the barracudina Arctozenus risso were caught in midwater trawls off the Flemish Cap in April 2016. These specimens displayed atypical traits including lack of teeth and gill rakers and fragile jaw bones; a combination of morphological examination and mtDNA sequencing confirmed species identification. Both specimens exhibited ripening ovaries and testes, confirming simultaneous hermaphroditism. These fish represent the first records of late-stage loss of features in the genus Arctozenus and may indicate a relationship to spawning in larger specimens.
2016年4月，在弗拉芒海角外海的中层拖网捕捞作业中捕获了两条不寻常的成年裸狗母鱼（Arctozenus risso）。这些标本呈现出非典型特征，包括无牙、无鳃耙以及脆弱的颌骨；形态学检查和线粒体DNA测序相结合确认了物种鉴定。两个标本都显示出卵巢和睾丸成熟，证实为雌雄同体。这些鱼代表了裸狗母鱼属后期特征丧失的首次记录，可能表明与较大标本的产卵有关。
