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A global assessment of fishes at lower abyssal and upper hadal depths (5000 to 8000 m)

Lookup NU author(s): Dr Alan Jamieson, Dr Thom Linley

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Abstract

© 2021 Elsevier LtdThe diversity of bait-attending fishes at lower abyssal and upper hadal depths was assessed using baited cameras in 14 subduction trenches, three fracture zones and two holes, spanning all five oceans. A total of 184 lander deployments from depths >5000 m (plus some additional observation from a submersible) were analysed to resolve the bathymetric extent of fishes and variations between locations. The most common families were the Macrouridae (grenadiers), Ophidiidae (cusk eels) and the Liparidae (snailfishes). Other less common families such as the Zoarcidae (eel pouts), Synphobranchidae (cut-throat eels) are reported, and the Stephanoberycidae (pricklefishes), and Ateleopodidae (jellynoses) were observed for the first time at hadal depths. While acknowledging many cryptic species and difficulty in identifying some groups from video, this study more than doubles the number of species and records of fishes at hadal depths and serves as an updated and illustrated collation of deepest fish records. We also discuss putative influences of temperature and oxygen on the depth range within the liparidae family, of which we found nine new species at hadal depths.

Publication metadata

Author(s): Jamieson AJ, Linley TD, Eigler S, Macdonald T

Publication type: Article

Publication status: Published

Journal: Deep-Sea Research Part I: Oceanographic Research Papers

Year: 2021

Volume: 178

Print publication date: 01/12/2021

Online publication date: 18/10/2021

Acceptance date: 15/10/2021

ISSN (electronic): 0967-0637

Publisher: Elsevier Ltd

URL: https://doi.org/10.1016/j.dsr.2021.103642

DOI: 10.1016/j.dsr.2021.103642

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