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Liparid and macrourid fishes of the hadal zone: in situ observations of activity and feeding behaviour

Liparid and macrourid fishes of the hadal zone: in situ observations of activity and feeding behaviour
Liparid and macrourid fishes of the hadal zone: in situ observations of activity and feeding behaviour
Using baited camera landers, the first images of living fishes were recorded in the hadal zone (6000–11 000 m) in the Pacific Ocean. The widespread abyssal macrourid Coryphaenoides yaquinae was observed at a new depth record of approximately 7000 m in the Japan Trench. Two endemic species of liparid were observed at similar depths: Pseudoliparis amblystomopsis in the Japan Trench and Notoliparis kermadecensis in the Kermadec Trench. From these observations, we have documented swimming and feeding behaviour of these species and derived the first estimates of hadal fish abundance. The liparids intercepted bait within 100–200 min but were observed to preferentially feed on scavenging amphipods. Notoliparis kermadecensis act as top predators in the hadal food web, exhibiting up to nine suction-feeding events per minute. Both species showed distinctive swimming gaits: P. amblystomopsis (mean length 22.5 cm) displayed a mean tail-beat frequency of 0.47 Hz and mean caudal : pectoral frequency ratio of 0.76, whereas N. kermadecensis (mean length 31.5 cm) displayed respective values of 1.04 and 2.08 Hz. Despite living at extreme depths, these endemic liparids exhibit similar activity levels compared with shallow-water liparids.
0962-8452
1037-1045
Jamieson, A.J.
ab7c9067-fe1d-47f9-921f-c57108b6f23c
Fujii, T.
374eb2a9-9b73-49e4-9174-ac8390b7543a
Solan, M.
c28b294a-1db6-4677-8eab-bd8d6221fecf
Matsumoto, A.K.
fd3631ab-fc2d-48d8-bec4-ed6a7c705dcb
Bagley, P.M.
c4ef9bbf-69ea-46dc-9d64-d8b1d0f2751c
Priede, I.G.
2e513dae-a9dd-45ed-8359-cee7e56e3097
Jamieson, A.J.
ab7c9067-fe1d-47f9-921f-c57108b6f23c
Fujii, T.
374eb2a9-9b73-49e4-9174-ac8390b7543a
Solan, M.
c28b294a-1db6-4677-8eab-bd8d6221fecf
Matsumoto, A.K.
fd3631ab-fc2d-48d8-bec4-ed6a7c705dcb
Bagley, P.M.
c4ef9bbf-69ea-46dc-9d64-d8b1d0f2751c
Priede, I.G.
2e513dae-a9dd-45ed-8359-cee7e56e3097

Jamieson, A.J., Fujii, T., Solan, M., Matsumoto, A.K., Bagley, P.M. and Priede, I.G. (2009) Liparid and macrourid fishes of the hadal zone: in situ observations of activity and feeding behaviour. Proceedings of the Royal Society B, 276 (1659), 1037-1045. (doi:10.1098/rspb.2008.1670).

Record type: Article

Abstract

Using baited camera landers, the first images of living fishes were recorded in the hadal zone (6000–11 000 m) in the Pacific Ocean. The widespread abyssal macrourid Coryphaenoides yaquinae was observed at a new depth record of approximately 7000 m in the Japan Trench. Two endemic species of liparid were observed at similar depths: Pseudoliparis amblystomopsis in the Japan Trench and Notoliparis kermadecensis in the Kermadec Trench. From these observations, we have documented swimming and feeding behaviour of these species and derived the first estimates of hadal fish abundance. The liparids intercepted bait within 100–200 min but were observed to preferentially feed on scavenging amphipods. Notoliparis kermadecensis act as top predators in the hadal food web, exhibiting up to nine suction-feeding events per minute. Both species showed distinctive swimming gaits: P. amblystomopsis (mean length 22.5 cm) displayed a mean tail-beat frequency of 0.47 Hz and mean caudal : pectoral frequency ratio of 0.76, whereas N. kermadecensis (mean length 31.5 cm) displayed respective values of 1.04 and 2.08 Hz. Despite living at extreme depths, these endemic liparids exhibit similar activity levels compared with shallow-water liparids.

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Published date: 22 March 2009

Identifiers

Local EPrints ID: 417341
URI: http://eprints.soton.ac.uk/id/eprint/417341
ISSN: 0962-8452
PURE UUID: 46dbb789-0b0e-4cd1-b9c3-00332d8104fe
ORCID for M. Solan: ORCID iD orcid.org/0000-0001-9924-5574

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Date deposited: 30 Jan 2018 17:30
Last modified: 10 Dec 2019 01:41

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Contributors

Author: A.J. Jamieson
Author: T. Fujii
Author: M. Solan ORCID iD
Author: A.K. Matsumoto
Author: P.M. Bagley
Author: I.G. Priede

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