Growth, reproduction and possible recruitment variability in the abyssal brittle star Ophiocten hastatum (Ophiuroidea:Echinodermata) in the NE Atlantic.
Growth was studied from skeletal growth markers in the cosmopolitan abyssal brittle star Ophiocten hastatm. Samples for analysis were taken at five sites located in the southern (2900 in) and central (2000 m) Rockall Trough, at ca. 3000 and 4000m in the Porcupine Seabight, and at 4850m on the Porcup...
Published in: | Deep Sea Research Part I: Oceanographic Research Papers |
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Format: | Article in Journal/Newspaper |
Language: | English |
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2004
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Online Access: | https://pure.uhi.ac.uk/en/publications/41697623-50e1-4a31-9c34-f5eece3ff1e8 https://doi.org/10.1016/j.dsr.2004.01.007 |
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ftuhipublicatio:oai:pure.atira.dk:publications/41697623-50e1-4a31-9c34-f5eece3ff1e8 2024-02-04T10:03:13+01:00 Growth, reproduction and possible recruitment variability in the abyssal brittle star Ophiocten hastatum (Ophiuroidea:Echinodermata) in the NE Atlantic. Gage, John D Anderson, Roslyn M Tyler, Paul Chapman, Rachel Dolan, Emily 2004 https://pure.uhi.ac.uk/en/publications/41697623-50e1-4a31-9c34-f5eece3ff1e8 https://doi.org/10.1016/j.dsr.2004.01.007 eng eng info:eu-repo/semantics/restrictedAccess Gage , J D , Anderson , R M , Tyler , P , Chapman , R & Dolan , E 2004 , ' Growth, reproduction and possible recruitment variability in the abyssal brittle star Ophiocten hastatum (Ophiuroidea : Echinodermata) in the NE Atlantic. ' , DEEP-SEA RES PT I , no. 1 , pp. 849-864 . https://doi.org/10.1016/j.dsr.2004.01.007 ROCKALL TROUGH LJUNGMANI PACIFIC SEA-FLOOR ECHINUS-AFFINIS SIZE STRUCTURE TIME-SERIES OCEAN PHYTODETRITUS NORTHEAST ATLANTIC/ article 2004 ftuhipublicatio https://doi.org/10.1016/j.dsr.2004.01.007 2024-01-11T23:20:45Z Growth was studied from skeletal growth markers in the cosmopolitan abyssal brittle star Ophiocten hastatm. Samples for analysis were taken at five sites located in the southern (2900 in) and central (2000 m) Rockall Trough, at ca. 3000 and 4000m in the Porcupine Seabight, and at 4850m on the Porcupine Abyssal Plain. Growth bands were assumed to reflect an annual cycle in skeletal growth. Band measurements on arm vertebrae, standardised to disc diameter, were used to provide size-at-age data and size-increment data that took into account overgrowth of early bands in older individuals. The Richards growth function marginally provides best fit to pooled size-at-age data, although the asymptote-less Tanaka function and the Gompertz growth function also provided good fit to size-at-age data which showed a rather linear growth pattern with little indication of a growth asymptote. Log(e) transformed size- increment data were linearised by applying the Ford-Walford method to approximate Gompertz growth so that growth could be compared at the five sites. Grouped linear regression and analysis of covariance showed no significant differences between growth at the sites and a common fitted regression. However, pairwise comparisons suggest growth differences with increasing bathymetric separation. Oocyte size frequencies measured from histological preparations of the gonad of specimens from the Porcupine Abyssal Plain indicate marked reproductive periodicity, with spawn-out in late winter that is likely followed by planktotrophic early development in spring with benthic settlement in summer. Although usually rare in the trawl and epibenthic sled samples, several years of successful recruitment followed by a period when recruitment was low or absent might explain size structure observed in a single unusually large sample from the Rockall Trough. This is consistent with previous observations during the late 1990s, of a large population increase on the Porcupine Abyssal Plain. Analysis of growth bands of these specimens ... Article in Journal/Newspaper Northeast Atlantic University of the Highlands and Islands: Research Database of UHI Pacific Porcupine Seabight ENVELOPE(-13.000,-13.000,50.500,50.500) Rockall Trough ENVELOPE(-15.036,-15.036,53.825,53.825) Deep Sea Research Part I: Oceanographic Research Papers 51 6 849 864 |
institution |
Open Polar |
collection |
University of the Highlands and Islands: Research Database of UHI |
op_collection_id |
ftuhipublicatio |
language |
English |
topic |
ROCKALL TROUGH LJUNGMANI PACIFIC SEA-FLOOR ECHINUS-AFFINIS SIZE STRUCTURE TIME-SERIES OCEAN PHYTODETRITUS NORTHEAST ATLANTIC/ |
spellingShingle |
ROCKALL TROUGH LJUNGMANI PACIFIC SEA-FLOOR ECHINUS-AFFINIS SIZE STRUCTURE TIME-SERIES OCEAN PHYTODETRITUS NORTHEAST ATLANTIC/ Gage, John D Anderson, Roslyn M Tyler, Paul Chapman, Rachel Dolan, Emily Growth, reproduction and possible recruitment variability in the abyssal brittle star Ophiocten hastatum (Ophiuroidea:Echinodermata) in the NE Atlantic. |
topic_facet |
ROCKALL TROUGH LJUNGMANI PACIFIC SEA-FLOOR ECHINUS-AFFINIS SIZE STRUCTURE TIME-SERIES OCEAN PHYTODETRITUS NORTHEAST ATLANTIC/ |
description |
Growth was studied from skeletal growth markers in the cosmopolitan abyssal brittle star Ophiocten hastatm. Samples for analysis were taken at five sites located in the southern (2900 in) and central (2000 m) Rockall Trough, at ca. 3000 and 4000m in the Porcupine Seabight, and at 4850m on the Porcupine Abyssal Plain. Growth bands were assumed to reflect an annual cycle in skeletal growth. Band measurements on arm vertebrae, standardised to disc diameter, were used to provide size-at-age data and size-increment data that took into account overgrowth of early bands in older individuals. The Richards growth function marginally provides best fit to pooled size-at-age data, although the asymptote-less Tanaka function and the Gompertz growth function also provided good fit to size-at-age data which showed a rather linear growth pattern with little indication of a growth asymptote. Log(e) transformed size- increment data were linearised by applying the Ford-Walford method to approximate Gompertz growth so that growth could be compared at the five sites. Grouped linear regression and analysis of covariance showed no significant differences between growth at the sites and a common fitted regression. However, pairwise comparisons suggest growth differences with increasing bathymetric separation. Oocyte size frequencies measured from histological preparations of the gonad of specimens from the Porcupine Abyssal Plain indicate marked reproductive periodicity, with spawn-out in late winter that is likely followed by planktotrophic early development in spring with benthic settlement in summer. Although usually rare in the trawl and epibenthic sled samples, several years of successful recruitment followed by a period when recruitment was low or absent might explain size structure observed in a single unusually large sample from the Rockall Trough. This is consistent with previous observations during the late 1990s, of a large population increase on the Porcupine Abyssal Plain. Analysis of growth bands of these specimens ... |
format |
Article in Journal/Newspaper |
author |
Gage, John D Anderson, Roslyn M Tyler, Paul Chapman, Rachel Dolan, Emily |
author_facet |
Gage, John D Anderson, Roslyn M Tyler, Paul Chapman, Rachel Dolan, Emily |
author_sort |
Gage, John D |
title |
Growth, reproduction and possible recruitment variability in the abyssal brittle star Ophiocten hastatum (Ophiuroidea:Echinodermata) in the NE Atlantic. |
title_short |
Growth, reproduction and possible recruitment variability in the abyssal brittle star Ophiocten hastatum (Ophiuroidea:Echinodermata) in the NE Atlantic. |
title_full |
Growth, reproduction and possible recruitment variability in the abyssal brittle star Ophiocten hastatum (Ophiuroidea:Echinodermata) in the NE Atlantic. |
title_fullStr |
Growth, reproduction and possible recruitment variability in the abyssal brittle star Ophiocten hastatum (Ophiuroidea:Echinodermata) in the NE Atlantic. |
title_full_unstemmed |
Growth, reproduction and possible recruitment variability in the abyssal brittle star Ophiocten hastatum (Ophiuroidea:Echinodermata) in the NE Atlantic. |
title_sort |
growth, reproduction and possible recruitment variability in the abyssal brittle star ophiocten hastatum (ophiuroidea:echinodermata) in the ne atlantic. |
publishDate |
2004 |
url |
https://pure.uhi.ac.uk/en/publications/41697623-50e1-4a31-9c34-f5eece3ff1e8 https://doi.org/10.1016/j.dsr.2004.01.007 |
long_lat |
ENVELOPE(-13.000,-13.000,50.500,50.500) ENVELOPE(-15.036,-15.036,53.825,53.825) |
geographic |
Pacific Porcupine Seabight Rockall Trough |
geographic_facet |
Pacific Porcupine Seabight Rockall Trough |
genre |
Northeast Atlantic |
genre_facet |
Northeast Atlantic |
op_source |
Gage , J D , Anderson , R M , Tyler , P , Chapman , R & Dolan , E 2004 , ' Growth, reproduction and possible recruitment variability in the abyssal brittle star Ophiocten hastatum (Ophiuroidea : Echinodermata) in the NE Atlantic. ' , DEEP-SEA RES PT I , no. 1 , pp. 849-864 . https://doi.org/10.1016/j.dsr.2004.01.007 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1016/j.dsr.2004.01.007 |
container_title |
Deep Sea Research Part I: Oceanographic Research Papers |
container_volume |
51 |
container_issue |
6 |
container_start_page |
849 |
op_container_end_page |
864 |
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1789970478992982016 |