Distribution, population structure, reproduction and diet of Ophiolimna antarctica (Lyman, 1879) from Kemp Caldera in the Southern Ocean


Boschen, Rachel E., Tyler, Paul A. and Copley, Jonathan T. (2013) Distribution, population structure, reproduction and diet of Ophiolimna antarctica (Lyman, 1879) from Kemp Caldera in the Southern Ocean Deep-Sea Research II, 92, pp. 27-35. (doi:10.1016/j.dsr2.2013.02.005).

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Description/Abstract

A new population of Ophiolimna antarctica (Lyman, 1879) was discovered at 1546 m in Kemp Caldera, a topographic feature with active hydrothermal venting at the southern end of the South Sandwich Islands, Southern Ocean. The distribution, population structure, reproduction, and diet of O. antarctica were investigated. O. antarctica were found predominantly on basalt with an over-dispersed distribution. The mean density was 17 individuals m?2 with a range of 9–24 individuals m?2. There was a bimodal population structure, with separate juvenile and adult peaks. Sexes were separate and the sex ratio was not significantly different from equality. The maximum oocyte diameter was 520 ?m, suggesting direct or lecithotrophic development, whilst individual females reproduced asynchronously. Stomach contents included crustacean fragments, flocculate material, diatoms, forams, fish scales, and ophiuroid tissues and spines, which was indicative of omnivory. There was no apparent influence of hydrothermal vents <500 m away on the diet of Ophiolimna antarctica. The ecology of Ophiolimna antarctica is consistent with what is known for other Antarctic and deep-sea ophiuroid species.

Item Type: Article
Digital Object Identifier (DOI): doi:10.1016/j.dsr2.2013.02.005
ISSNs: 0967-0645 (print)
Keywords: Deep sea, Ophiuroid, Antarctic, Reproduction, Diet, Distribution
Subjects: G Geography. Anthropology. Recreation > GC Oceanography
Q Science > QH Natural history > QH301 Biology
Organisations: Ocean Biochemistry & Ecosystems
ePrint ID: 354203
Date :
Date Event
August 2013Published
Date Deposited: 03 Jul 2013 15:40
Last Modified: 17 Apr 2017 15:19
Further Information:Google Scholar
URI: http://eprints.soton.ac.uk/id/eprint/354203

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