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Bait-attending fauna of the Kermadec Trench, SW Pacific Ocean: Evidence for an ecotone across the abyssal–hadal transition zone

Jamieson, A.J., Kilgallen, N.M., Rowden, A.A., Fujii, T., Horton, T., Lörz, A.-N., Kitazawa, K. and Priede, I.G. (2011) Bait-attending fauna of the Kermadec Trench, SW Pacific Ocean: Evidence for an ecotone across the abyssal–hadal transition zone Deep Sea Research Part I: Oceanographic Research Papers, 58, (1), pp. 49-62. (doi:10.1016/j.dsr.2010.11.003).

Record type: Article

Abstract

The bait-attending fauna of the abyssal–hadal transition zone of the Kermadec Trench, SW Pacific Ocean (4329–7966 m), was investigated using a baited camera and a trap lander. The abyssal stations (4329–6007 m) revealed a typical scavenging fish community comprising macrourids and synaphobranchid eels, as well as natantian decapods. At the hadal depths of 7199 and 7561 m, the endemic liparid Notoliparis kermadecensis was observed aggregating at the bait reaching surprisingly high numbers of 5 and 13, respectively. A total of 3183 invertebrate samples were collected (mean deployment time=16 h) of which 97.8% were of the order Amphipoda (nine families, 16 species). Ten of the amphipod species represent new distributional records for the Kermadec Trench and the New Zealand Exclusive Economic Zone; this includes the shallowest known record of the endemic hadal amphipod Hirondellea dubia (6000, 6007 m). Using amphipods to statistically examine the compositional change across the abyssal–hadal boundary, an ecotone between depths <6007 and >6890 m was found, indicating that there is an ecologically distinct bait-attending fauna in this trench.

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Published date: 2011

Identifiers

Local EPrints ID: 179229
URI: http://eprints.soton.ac.uk/id/eprint/179229
ISSN: 0967-0637
PURE UUID: 62a0eda6-8bdf-4cbe-bf82-b81212cd75c3

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Date deposited: 31 Mar 2011 12:41
Last modified: 18 Jul 2017 12:03

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Contributors

Author: A.J. Jamieson
Author: N.M. Kilgallen
Author: A.A. Rowden
Author: T. Fujii
Author: T. Horton
Author: A.-N. Lörz
Author: K. Kitazawa
Author: I.G. Priede

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