The University of Southampton
University of Southampton Institutional Repository

Propagule size effects across multiple life-history stages in a marine invertebrate

Record type: Article


1.?Mothers must balance the fecundity costs of increasing propagule size with the fitness benefits of increased propagule performance, and the propagule size-performance relationship is crucial for determining this trade-off.

2.?While many studies have examined the propagule size-performance relationship in individual life-history stages, very few have examined the relationship between propagule size and performance across multiple life-history stages despite the ubiquity of complex life cycles.

3.?We examined the consistency of the propagule size-performance relationship across several life-history stages in the marine invertebrate Microcosmus squamiger (Ascidiacea).

4.?Propagule size had effects in some life-history stages and not others: larger propagules hatched sooner as larvae and grew more as juveniles in the field. On the other hand, propagule size had no effect on cell cleavage rates, larval swimming time or post-metamorphic survival in the field.

5.?The effects of propagule size on juvenile size were persistent – juveniles that came from larger propagules were still larger than juveniles that came from smaller propagules after 11 weeks in the field.

6.?We found no evidence of conflicting selection pressures on propagule size among life-history stages. Rather, in this species at least, the selection on propagule size at both the larval and juvenile stage appeared to favour the production of larger propagules. Nevertheless, the slope of the relationship between propagule size and performance was highly variable among life-history stages.

7.?The effects of propagule size across multiple life-history stages are determined by the strength of selection pressures, which can be highly variable in organisms with complex life-cycles.

Full text not available from this repository.


Rius, Marc, Turon, Xavier, Dias, Gustavo M. and Marshall, Dustin J. (2010) Propagule size effects across multiple life-history stages in a marine invertebrate Functional Ecology, 24, (3), pp. 685-693. (doi:10.1111/j.1365-2435.2009.01668.x).

More information

e-pub ahead of print date: 25 November 2009
Published date: June 2010
Keywords: fertilization, larval size, propagule performance, post-metamorphic, settlement
Organisations: Ocean Biochemistry & Ecosystems


Local EPrints ID: 354678
ISSN: 0269-8463
PURE UUID: 3eab14d7-8cee-4916-bbbd-ac3eb063653f

Catalogue record

Date deposited: 17 Jul 2013 11:23
Last modified: 18 Jul 2017 03:53

Export record



Author: Marc Rius
Author: Xavier Turon
Author: Gustavo M. Dias
Author: Dustin J. Marshall

University divisions

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 supports OAI 2.0 with a base URL of

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.