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The hemisessile lifestyle and feeding strategies of Iosactis vagabunda (Actiniaria, Iosactiidae), a dominant megafaunal species of the Porcupine Abyssal Plain

The hemisessile lifestyle and feeding strategies of Iosactis vagabunda (Actiniaria, Iosactiidae), a dominant megafaunal species of the Porcupine Abyssal Plain
The hemisessile lifestyle and feeding strategies of Iosactis vagabunda (Actiniaria, Iosactiidae), a dominant megafaunal species of the Porcupine Abyssal Plain
Iosactis vagabunda Riemann-Zürneck, 1997 (Actiniaria, Iosactiidae) is a small endomyarian anemone, recently quantified as the greatest contributor to megafaunal density (48%; 2372 individuals ha?1) on the Porcupine Abyssal Plain (PAP). We used time-lapse photography to observe 18 individuals over a period of approximately 20 months at 8-h intervals, and one individual over 2 weeks at 20-mine intervals, and report observations on its burrowing activity, and both deposit and predatory feeding behaviours. We recorded the apparent subsurface movement of an individual from an abandoned burrow to a new location, and burrow creation there. Raptorial deposit feeding on settled phytodetritus particles was observed, as was predation on a polychaete 6-times the estimated biomass of the anemone. Though essentially unnoticed in prior studies of the PAP, I. vagabunda may be a key component of the benthic community, and may make a critical contribution to the carbon cycling at the PAP long-term time-series study site.
Deep-sea, Megafauna, Actiniaria, Behaviour, Burrowing, Predation
0967-0637
72-77
Durden, Jennifer M.
a65f5d1f-2009-476a-a8c6-3c32683d9eb9
Bett, Brian J.
61342990-13be-45ae-9f5c-9540114335d9
Ruhl, Henry A.
177608ef-7793-4911-86cf-cd9960ff22b6
Durden, Jennifer M.
a65f5d1f-2009-476a-a8c6-3c32683d9eb9
Bett, Brian J.
61342990-13be-45ae-9f5c-9540114335d9
Ruhl, Henry A.
177608ef-7793-4911-86cf-cd9960ff22b6

Durden, Jennifer M., Bett, Brian J. and Ruhl, Henry A. (2015) The hemisessile lifestyle and feeding strategies of Iosactis vagabunda (Actiniaria, Iosactiidae), a dominant megafaunal species of the Porcupine Abyssal Plain. Deep Sea Research Part I: Oceanographic Research Papers, 102, 72-77. (doi:10.1016/j.dsr.2015.04.010).

Record type: Article

Abstract

Iosactis vagabunda Riemann-Zürneck, 1997 (Actiniaria, Iosactiidae) is a small endomyarian anemone, recently quantified as the greatest contributor to megafaunal density (48%; 2372 individuals ha?1) on the Porcupine Abyssal Plain (PAP). We used time-lapse photography to observe 18 individuals over a period of approximately 20 months at 8-h intervals, and one individual over 2 weeks at 20-mine intervals, and report observations on its burrowing activity, and both deposit and predatory feeding behaviours. We recorded the apparent subsurface movement of an individual from an abandoned burrow to a new location, and burrow creation there. Raptorial deposit feeding on settled phytodetritus particles was observed, as was predation on a polychaete 6-times the estimated biomass of the anemone. Though essentially unnoticed in prior studies of the PAP, I. vagabunda may be a key component of the benthic community, and may make a critical contribution to the carbon cycling at the PAP long-term time-series study site.

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More information

Accepted/In Press date: March 2015
Published date: August 2015
Keywords: Deep-sea, Megafauna, Actiniaria, Behaviour, Burrowing, Predation
Organisations: Ocean and Earth Science, Marine Biogeochemistry

Identifiers

Local EPrints ID: 376897
URI: http://eprints.soton.ac.uk/id/eprint/376897
ISSN: 0967-0637
PURE UUID: 1ff0ea45-9b9e-4dea-9172-5207d771cc67

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Date deposited: 08 May 2015 08:37
Last modified: 08 Jan 2022 15:21

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Contributors

Author: Jennifer M. Durden
Author: Brian J. Bett
Author: Henry A. Ruhl

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