The University of Southampton
University of Southampton Institutional Repository

Gonad development and fatty acid composition of Patella depressa Pennant (Gastropoda: Prosobranchia) populations with different patterns of spatial distribution, in exposed and sheltered sites

Record type: Article

The present study examines the effect of shore exposure on the feeding performance (assessed by fatty acid analyses of the whole body) and gonad condition (stage of development and gonad somatic index, GSI) of Patella depressa populations. Male and female limpets were collected at exposed and sheltered sites, during winter and summer. The population at the exposed site was at a more advanced stage of gonad development, with a higher dispersion of gonad stages, both in winter and summer. Additionally, limpets from the exposed site, particularly the males, presented a higher GSI than the corresponding stage in the sheltered site. The quantitatively most important fatty acids were the saturated fatty acids (SFA) 16:0, 14:0, and 18:0, the monounsaturated fatty acids (MUFA) 18:1(n-7), 18:1(n-9), 16:1(n-7) and 20:1(n-9) and the polyunsaturated fatty acids (PUFA) 20:5(n-3) and 20:4(n-6). Females had a significantly higher fatty acid methyl esters (FAME) content (in summer and winter) and higher amounts of SFA and MUFA (in summer), which points to a higher degree of storage of neutral lipids in this sex. Male and female limpets at the exposed site had a significantly higher FAME, SFA, MUFA, PUFA and highly unsaturated fatty acids (HUFA) content than the corresponding sex in the sheltered site in summer. In addition, an inversion in the eicosapentaenoic acid (EPA)/arachidonic acid (ARA) and (n-3)/(n-6) ratios was observed in the sheltered site, as a result of the significantly higher levels of ARA and (n-6) fatty acids and lower amounts of EPA and (n-3) fatty acids found in the sheltered limpets. A high variability among patches in the fatty acid composition in the exposed site was found in winter, possibly related to the aggregation of limpets at this time. The differences found between limpets from the exposed and sheltered sites suggest qualitative and quantitative differences in their diets. Additionally, the results show that the spatial aggregation strategy adopted by limpets in sites of great wave and wind exposure does not affect their feeding and reproductive success, at least in the site examined here. In fact, more developed gonads, a higher GSI and an elevated FAME content was found in the exposed population. Possible factors are suggested and discussed to explain these observations.

Full text not available from this repository.

Citation

Morais, Sofia, Boaventura, Diana, Narciso, Luis, Re, Pedro and Hawkins, Stephen J. (2003) Gonad development and fatty acid composition of Patella depressa Pennant (Gastropoda: Prosobranchia) populations with different patterns of spatial distribution, in exposed and sheltered sites Journal of Experimental Marine Biology and Ecology, 294, (1), pp. 61-80. (doi:10.1016/S0022-0981(03)00258-2).

More information

Submitted date: 2 January 2003
Published date: 23 September 2003
Keywords: fatty acid composition, gastropods, gonad development, limpet, patella depressa, shore exposure, spatial distfibution

Identifiers

Local EPrints ID: 57728
URI: http://eprints.soton.ac.uk/id/eprint/57728
ISSN: 0022-0981
PURE UUID: 0d6027b0-87f0-49a8-ae6a-56070b9f6526

Catalogue record

Date deposited: 11 Aug 2008
Last modified: 17 Jul 2017 14:28

Export record

Altmetrics

Contributors

Author: Sofia Morais
Author: Diana Boaventura
Author: Luis Narciso
Author: Pedro Re

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.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.

×