Growth and size-structure of stegophiura sp (echinodermata: ophiuroidea) on the continental slope off central chile: a comparison between cold seep and non-seep sites
The growth and size-structure of the bathyal ophiuroid brittle star, Stegophiura sp., were analysed from skeletal growth bands and disc diameter frequencies. Specimens were collected in trawl samples taken on the continental slope off central Chile (similar to 36 degrees S) at two sites within the r...
Published in: | Journal of the Marine Biological Association of the United Kingdom |
---|---|
Main Authors: | , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
CAMBRIDGE UNIV PRESS
|
Subjects: | |
Online Access: | http://hdl.handle.net/10533/198015 https://doi.org/10.1017/S0025315408002786 |
id |
ftconicyt:oai:localhost:10533/198015 |
---|---|
record_format |
openpolar |
spelling |
ftconicyt:oai:localhost:10533/198015 2023-05-15T13:53:09+02:00 Growth and size-structure of stegophiura sp (echinodermata: ophiuroidea) on the continental slope off central chile: a comparison between cold seep and non-seep sites Quiroga-Jamett, Eduardo Sellanes-López, Rogelio GBR NEW YORK http://hdl.handle.net/10533/198015 https://doi.org/10.1017/S0025315408002786 ENG eng CAMBRIDGE UNIV PRESS instname: Conicyt reponame: Repositorio Digital RI2.0 info:eu-repo/grantAgreement/Fondef/D04I1111 info:eu-repo/semantics/dataset/hdl.handle.net/10533/93477 http://hdl.handle.net/10533/198015 doi:10.1017/S0025315408002786 wos: WOS:000265420100025 eissn: 0 issn: 0025-3154 info:eu-repo/semantics/openAccess JOURNAL OF THE MARINE BIOLOGICAL ASSOCIATION OF THE UNITED KINGDOM (PRINT) info:eu-repo/semantics/article ftconicyt https://doi.org/10.1017/S0025315408002786 2019-09-07T08:18:45Z The growth and size-structure of the bathyal ophiuroid brittle star, Stegophiura sp., were analysed from skeletal growth bands and disc diameter frequencies. Specimens were collected in trawl samples taken on the continental slope off central Chile (similar to 36 degrees S) at two sites within the recently discovered Concepcion Methane Seep Area (CMSA) and at two control non-seep sites. Growth bands were measured as radii of vertebral ossicles from scanning electron microscope (SEM) micrographs and used to provide size-at-age data. The von Bertalanffy and the Gompertz growth models provided good fit to size-at-age data. The size-structure distributions observed in the study area suggest that small-bodied (<10 mm disc diameter) individuals of Stegophiura. sp. are more abundant near seep sites, probably attracted there by the presence of methane-derived authigenic carbonates, which provide a preferred habitat for ophiuroids and benthic fauna in general. Furthermore, size-at-age data from measurements of the ossicle growth bands indicate relatively rapid growth of Stegophiura sp. populations at seep sites. Assuming that the growth rings are annual, the maximum Stegophiura sp. age was estimated to be 15 years. The growth performance of this species falls within the range of values reported for sub-Antarctic and bathyal species. Article in Journal/Newspaper Antarc* Antarctic Repositorio Digital Conicyt RI 2.0 (Comisión Nacional de Investigación Científica y Tecnológica) Antarctic Journal of the Marine Biological Association of the United Kingdom 89 2 421 428 |
institution |
Open Polar |
collection |
Repositorio Digital Conicyt RI 2.0 (Comisión Nacional de Investigación Científica y Tecnológica) |
op_collection_id |
ftconicyt |
language |
English |
description |
The growth and size-structure of the bathyal ophiuroid brittle star, Stegophiura sp., were analysed from skeletal growth bands and disc diameter frequencies. Specimens were collected in trawl samples taken on the continental slope off central Chile (similar to 36 degrees S) at two sites within the recently discovered Concepcion Methane Seep Area (CMSA) and at two control non-seep sites. Growth bands were measured as radii of vertebral ossicles from scanning electron microscope (SEM) micrographs and used to provide size-at-age data. The von Bertalanffy and the Gompertz growth models provided good fit to size-at-age data. The size-structure distributions observed in the study area suggest that small-bodied (<10 mm disc diameter) individuals of Stegophiura. sp. are more abundant near seep sites, probably attracted there by the presence of methane-derived authigenic carbonates, which provide a preferred habitat for ophiuroids and benthic fauna in general. Furthermore, size-at-age data from measurements of the ossicle growth bands indicate relatively rapid growth of Stegophiura sp. populations at seep sites. Assuming that the growth rings are annual, the maximum Stegophiura sp. age was estimated to be 15 years. The growth performance of this species falls within the range of values reported for sub-Antarctic and bathyal species. |
format |
Article in Journal/Newspaper |
author |
Quiroga-Jamett, Eduardo Sellanes-López, Rogelio |
spellingShingle |
Quiroga-Jamett, Eduardo Sellanes-López, Rogelio Growth and size-structure of stegophiura sp (echinodermata: ophiuroidea) on the continental slope off central chile: a comparison between cold seep and non-seep sites |
author_facet |
Quiroga-Jamett, Eduardo Sellanes-López, Rogelio |
author_sort |
Quiroga-Jamett, Eduardo |
title |
Growth and size-structure of stegophiura sp (echinodermata: ophiuroidea) on the continental slope off central chile: a comparison between cold seep and non-seep sites |
title_short |
Growth and size-structure of stegophiura sp (echinodermata: ophiuroidea) on the continental slope off central chile: a comparison between cold seep and non-seep sites |
title_full |
Growth and size-structure of stegophiura sp (echinodermata: ophiuroidea) on the continental slope off central chile: a comparison between cold seep and non-seep sites |
title_fullStr |
Growth and size-structure of stegophiura sp (echinodermata: ophiuroidea) on the continental slope off central chile: a comparison between cold seep and non-seep sites |
title_full_unstemmed |
Growth and size-structure of stegophiura sp (echinodermata: ophiuroidea) on the continental slope off central chile: a comparison between cold seep and non-seep sites |
title_sort |
growth and size-structure of stegophiura sp (echinodermata: ophiuroidea) on the continental slope off central chile: a comparison between cold seep and non-seep sites |
publisher |
CAMBRIDGE UNIV PRESS |
url |
http://hdl.handle.net/10533/198015 https://doi.org/10.1017/S0025315408002786 |
op_coverage |
GBR NEW YORK |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_source |
JOURNAL OF THE MARINE BIOLOGICAL ASSOCIATION OF THE UNITED KINGDOM (PRINT) |
op_relation |
instname: Conicyt reponame: Repositorio Digital RI2.0 info:eu-repo/grantAgreement/Fondef/D04I1111 info:eu-repo/semantics/dataset/hdl.handle.net/10533/93477 http://hdl.handle.net/10533/198015 doi:10.1017/S0025315408002786 wos: WOS:000265420100025 eissn: 0 issn: 0025-3154 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1017/S0025315408002786 |
container_title |
Journal of the Marine Biological Association of the United Kingdom |
container_volume |
89 |
container_issue |
2 |
container_start_page |
421 |
op_container_end_page |
428 |
_version_ |
1766258131805929472 |