The University of Southampton
University of Southampton Institutional Repository

Changes in biomass and elemental composition during early ontogeny of the Antarctic isopod crustacean Ceratoserolis trilobitoides

Changes in biomass and elemental composition during early ontogeny of the Antarctic isopod crustacean Ceratoserolis trilobitoides
Changes in biomass and elemental composition during early ontogeny of the Antarctic isopod crustacean Ceratoserolis trilobitoides
Changes in biomass and elemental composition (dry mass, DM; carbon, C; hydrogen, H; nitrogen, N) were studied throughout the early ontogeny in the serolid isopod Ceratoserolis trilobitoides from a population off the South Shetland Islands (62°24.35?S, 61°23.77?W). Specimens of C. trilobitoides were sampled using an Agassiz trawl during the expedition ANT XXIII-8 of RV Polarstern in January 2007. Classification of embryos into six developmental stages followed previous studies. No clear size-dependant fecundity relationship was found in ovigerous C. trilobitoides. Egg volume increased by about 160 and 400% from stage I to IV and stage IV to VI, respectively. DM, C, N, and H continuously decreased throughout the early ontogeny from stage I to VI, but DM showed significant increase on reaching the late-V stage and premanca stages. The C:N ratio remained relatively stable throughout stages I to V, followed by a significant drop from about 6.17 to 5.5 in subsequent stages, indicating depletion of lipid resources of maternal origin. The results coincide with previous studies and indicate a shift from a lipid-based metabolism throughout early embryo stages to a protein-based metabolism in the late-V and premanca stage, which requires external energy supply. Given the steep increase in DM in the final phase of embryo development (late-V stage to premanca) and the need for external food supply to exert growth, the possibility of external food supply or cannibalism in early offspring of C. trilobitoides is discussed.
Invertebrate reproduction, Cold adaptation, Serolidae, Peracarida
0722-4060
1325-1331
Heilmayer, Olaf
fbdf6076-4104-418a-bbe7-f344e046ff25
Thatje, Sven
f1011fe3-1048-40c0-97c1-e93b796e6533
McClelland, Christine
e25a1e3d-223a-4e66-bdf3-ca4108367035
Conlan, Kathleen
1c6fe7fd-6cc4-4c4b-bd82-40f782a97d3a
Brey, Thomas
a44d30a6-811a-47ae-8da0-63008e0437a3
Heilmayer, Olaf
fbdf6076-4104-418a-bbe7-f344e046ff25
Thatje, Sven
f1011fe3-1048-40c0-97c1-e93b796e6533
McClelland, Christine
e25a1e3d-223a-4e66-bdf3-ca4108367035
Conlan, Kathleen
1c6fe7fd-6cc4-4c4b-bd82-40f782a97d3a
Brey, Thomas
a44d30a6-811a-47ae-8da0-63008e0437a3

Heilmayer, Olaf, Thatje, Sven, McClelland, Christine, Conlan, Kathleen and Brey, Thomas (2008) Changes in biomass and elemental composition during early ontogeny of the Antarctic isopod crustacean Ceratoserolis trilobitoides. Polar Biology, 31 (11), 1325-1331. (doi:10.1007/s00300-008-0470-8).

Record type: Article

Abstract

Changes in biomass and elemental composition (dry mass, DM; carbon, C; hydrogen, H; nitrogen, N) were studied throughout the early ontogeny in the serolid isopod Ceratoserolis trilobitoides from a population off the South Shetland Islands (62°24.35?S, 61°23.77?W). Specimens of C. trilobitoides were sampled using an Agassiz trawl during the expedition ANT XXIII-8 of RV Polarstern in January 2007. Classification of embryos into six developmental stages followed previous studies. No clear size-dependant fecundity relationship was found in ovigerous C. trilobitoides. Egg volume increased by about 160 and 400% from stage I to IV and stage IV to VI, respectively. DM, C, N, and H continuously decreased throughout the early ontogeny from stage I to VI, but DM showed significant increase on reaching the late-V stage and premanca stages. The C:N ratio remained relatively stable throughout stages I to V, followed by a significant drop from about 6.17 to 5.5 in subsequent stages, indicating depletion of lipid resources of maternal origin. The results coincide with previous studies and indicate a shift from a lipid-based metabolism throughout early embryo stages to a protein-based metabolism in the late-V and premanca stage, which requires external energy supply. Given the steep increase in DM in the final phase of embryo development (late-V stage to premanca) and the need for external food supply to exert growth, the possibility of external food supply or cannibalism in early offspring of C. trilobitoides is discussed.

Text
Heilmayer_PolarBiol_08.pdf - Other
Download (315kB)

More information

Published date: October 2008
Keywords: Invertebrate reproduction, Cold adaptation, Serolidae, Peracarida

Identifiers

Local EPrints ID: 51151
URI: http://eprints.soton.ac.uk/id/eprint/51151
ISSN: 0722-4060
PURE UUID: e213d452-8270-4100-9030-8b80191f2210

Catalogue record

Date deposited: 07 May 2008
Last modified: 15 Mar 2024 10:15

Export record

Altmetrics

Contributors

Author: Olaf Heilmayer
Author: Sven Thatje
Author: Christine McClelland
Author: Kathleen Conlan
Author: Thomas Brey

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.

×