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  • Journal of the Marine Biological Association of the United Kingdom, Volume 92, Issue 1
  • February 2012, pp. 143-150

In situ observations of trophic behaviour and locomotion of Princaxelia amphipods (Crustacea: Pardaliscidae) at hadal depths in four West Pacific Trenches

  • Alan J. Jamieson (a1), Anne-Nina Lörz (a2), Toyonobu Fujii (a1) and Imants G. Priede (a1)
  • DOI: http://dx.doi.org/10.1017/S0025315411000452
  • Published online: 19 April 2011
Abstract

The genus Princaxelia, Pardaliscidae, is a rarely recorded, infrequently collected and hitherto observed benthic amphipod, typically found at hadal depths (>6000 m) in the Pacific Ocean trenches. Little is known about the behaviour or physiology of this genus. Using a baited camera lander, observations of Princaxelia jamiesoni were made in the Japan Trench (7703 m) and Izu–Ogasawara Trench (9316 m) and of Princaxelia aff. abyssalis in the Kermadec Trench (7966 m) and Tonga Trench (8798 m). These amphipods rapidly intercepted the bait and preyed upon smaller lysianassoid amphipods. Mean absolute swimming speeds for P. jamiesoni and P. aff. abyssalis were 4.16 cm.s−1 ± 1.8 SD and 4.02 cm.s−1 ± 0.87 SD respectively. These amphipods have the capacity for long range swimming, high manoeuvrability in close range, and efficient predatory behaviour. Burst swimming speeds for P. aff. abyssalis were 9 and 10 cm.s−1 with accelerations up to 22–25 cm.s−2.

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Corresponding author
Correspondence should be addressed to: A.J. Jamieson, Oceanlab, Institute of Biological and Environmental Science, University of Aberdeen, Main Street, Newburgh, Aberdeenshire, UKAB41 6AA email: a.jamieson@abdn.ac.uk
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T. Fujii , A.J. Jamieson , M. Solan , P.M. Bagley and I.G. Priede (2010) A large aggregation of liparids at 7703 m depth and a reappraisal of the abundance and diversity of hadal fish. BioScience 60, 506515.

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I. Takeuchi and K. Watanabe (1998) Respiration rate and swimming speed of the necrophagous amphipod Eurythenes gryllus from Antarctic deep waters. Marine Ecology Progress Series 163, 285288.

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Journal of the Marine Biological Association of the United Kingdom
  • ISSN: 0025-3154
  • EISSN: 1469-7769
  • URL: /core/journals/journal-of-the-marine-biological-association-of-the-united-kingdom
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