The University of Southampton
University of Southampton Institutional Repository

Reproductive biology of the abyssal holothurian Amperima rosea: an opportunistic response to variable flux of surface derived organic matter?

Wigham, B.D., Tyler, P.A. and Billett, D.S.M. (2003) Reproductive biology of the abyssal holothurian Amperima rosea: an opportunistic response to variable flux of surface derived organic matter? Journal of the Marine Biological Association of the United Kingdom, 83, (1), pp. 175-188.

Record type: Article

Abstract

A radical change in the abundance of invertebrate megafauna has occurred over a vast area of the Porcupine Abyssal Plain, north-east Atlantic, in recent years. In particular, the holothurian Amperima rosea has increased in abundance by three orders of magnitude. The sudden increase in abundance of A. rosea appears to be the result of environmental forcing rather than localized stochastic population variations. Amperima rosea produces small eggs ([less-than-or-eq, slant]200 [mu]m) indicating (1) planktotrophic larval development or (2) lecithotrophic larval development with an abbreviated larval stage. It also reaches maturity at a very small size. The reproductive biology of A. rosea indicates that it can increase rapidly in population size and can colonize large areas quickly. It has high fecundity, as predicted by gonad indices and observed in histological studies. Fecundity was greater in winter than in summer months, but there was no clear evidence of seasonal or episodic reproductive events. All males, irrespective of sample season or year, were mature with spermatozoa. Most oocytes were of an intermediate size (70 to 120 [mu]m), either at the late previtellogenic (70–90 [mu]m) or early vitellogenic (100–120 [mu]m) stage of development. It is postulated that development of full vitellogenesis, leading to episodic spawning, might be dependent on certain environmental stimuli. The most likely stimulus is food supply. Amperima rosea has been shown to feed preferentially on phytodetritus and to have a requirement for certain sterols in its diet. Qualitative changes in the flux of organic matter to the sea-floor may control vitellogenesis and fecundity, and hence have an effect on the population dynamics of the species.

PDF 2207.pdf - Version of Record
Restricted to Repository staff only
Download (3MB)

More information

Published date: February 2003
Keywords: mediterranean sea (w), biology

Identifiers

Local EPrints ID: 2207
URI: http://eprints.soton.ac.uk/id/eprint/2207
ISSN: 0025-3154
PURE UUID: d0ed054a-df4b-4ebc-99bd-9116e5bdc13f

Catalogue record

Date deposited: 20 May 2004
Last modified: 17 Jul 2017 17:15

Export record

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of http://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×