Observations on the ecology of Pleurobrachia pileus (Ctenophora) in the southern Benguela ecosystem
The vertical distribution, abundance and size composition of a population of Pleurobrachia pileus was studied during a six-day drogue study conducted off the west coast of South Africa in February 1995. The population was centred in deep water, possibly because of the presence of a potential predato...
Published in: | African Journal of Marine Science |
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Format: | Article in Journal/Newspaper |
Language: | English |
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2003
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Online Access: | http://hdl.handle.net/10566/370 |
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ftunivwesterncrr:oai:repository.uwc.ac.za:10566/370 2023-05-15T17:11:04+02:00 Observations on the ecology of Pleurobrachia pileus (Ctenophora) in the southern Benguela ecosystem Buecher, Emmanuelle Thibault-Botha, D. Gibbons, Mark J. 2003 application/pdf http://hdl.handle.net/10566/370 en eng NISC (Pty) Ltd and Taylor & Francis Gibbons, M.J. et al. (2003). Observations on the ecology of Pleurobrachia pileus (Ctenophora) in the southern Benguela ecosystem. African Journal of Marine Science, 25(1): 253-261 02577615 http://hdl.handle.net/10566/370 The South African Journal of Marine Science (now African Journal Marine Science) is published by NISC (Pty) Ltd and Taylor& Francis and available online at http://www.tandfonline.com/loi/tams20. Publisher authorised author to deposit this file. http://dx.doi.org/10.2989/18142320309504014 Pleurobrachia pileus Benguela upwelling ecosystem Size structure Vertical distribution Article 2003 ftunivwesterncrr https://doi.org/10.2989/18142320309504014 2022-04-26T18:55:46Z The vertical distribution, abundance and size composition of a population of Pleurobrachia pileus was studied during a six-day drogue study conducted off the west coast of South Africa in February 1995. The population was centred in deep water, possibly because of the presence of a potential predator, Beroe sp., at shallower depths. The population of P. pileus failed to display clear patterns of migration, although nocturnal recruitment from deeper water resulted in a deepening of the depth of occupation then. The population was dominated by individuals <4 mm polar diameter, and large animals were confined to the upper water layers. These results are discussed with reference to possible spawning activities. Using published equations relating size to clearance rates, it was estimated that the population could remove up to 27% of integrated mesozooplankton standing stocks, and in excess of 100% (293%) at some depths. Web of Science Article in Journal/Newspaper Mesozooplankton University of the Western Cap: UWC Research Repository African Journal of Marine Science 25 1 253 261 |
institution |
Open Polar |
collection |
University of the Western Cap: UWC Research Repository |
op_collection_id |
ftunivwesterncrr |
language |
English |
topic |
Pleurobrachia pileus Benguela upwelling ecosystem Size structure Vertical distribution |
spellingShingle |
Pleurobrachia pileus Benguela upwelling ecosystem Size structure Vertical distribution Buecher, Emmanuelle Thibault-Botha, D. Gibbons, Mark J. Observations on the ecology of Pleurobrachia pileus (Ctenophora) in the southern Benguela ecosystem |
topic_facet |
Pleurobrachia pileus Benguela upwelling ecosystem Size structure Vertical distribution |
description |
The vertical distribution, abundance and size composition of a population of Pleurobrachia pileus was studied during a six-day drogue study conducted off the west coast of South Africa in February 1995. The population was centred in deep water, possibly because of the presence of a potential predator, Beroe sp., at shallower depths. The population of P. pileus failed to display clear patterns of migration, although nocturnal recruitment from deeper water resulted in a deepening of the depth of occupation then. The population was dominated by individuals <4 mm polar diameter, and large animals were confined to the upper water layers. These results are discussed with reference to possible spawning activities. Using published equations relating size to clearance rates, it was estimated that the population could remove up to 27% of integrated mesozooplankton standing stocks, and in excess of 100% (293%) at some depths. Web of Science |
format |
Article in Journal/Newspaper |
author |
Buecher, Emmanuelle Thibault-Botha, D. Gibbons, Mark J. |
author_facet |
Buecher, Emmanuelle Thibault-Botha, D. Gibbons, Mark J. |
author_sort |
Buecher, Emmanuelle |
title |
Observations on the ecology of Pleurobrachia pileus (Ctenophora) in the southern Benguela ecosystem |
title_short |
Observations on the ecology of Pleurobrachia pileus (Ctenophora) in the southern Benguela ecosystem |
title_full |
Observations on the ecology of Pleurobrachia pileus (Ctenophora) in the southern Benguela ecosystem |
title_fullStr |
Observations on the ecology of Pleurobrachia pileus (Ctenophora) in the southern Benguela ecosystem |
title_full_unstemmed |
Observations on the ecology of Pleurobrachia pileus (Ctenophora) in the southern Benguela ecosystem |
title_sort |
observations on the ecology of pleurobrachia pileus (ctenophora) in the southern benguela ecosystem |
publisher |
NISC (Pty) Ltd and Taylor & Francis |
publishDate |
2003 |
url |
http://hdl.handle.net/10566/370 |
genre |
Mesozooplankton |
genre_facet |
Mesozooplankton |
op_source |
http://dx.doi.org/10.2989/18142320309504014 |
op_relation |
Gibbons, M.J. et al. (2003). Observations on the ecology of Pleurobrachia pileus (Ctenophora) in the southern Benguela ecosystem. African Journal of Marine Science, 25(1): 253-261 02577615 http://hdl.handle.net/10566/370 |
op_rights |
The South African Journal of Marine Science (now African Journal Marine Science) is published by NISC (Pty) Ltd and Taylor& Francis and available online at http://www.tandfonline.com/loi/tams20. Publisher authorised author to deposit this file. |
op_doi |
https://doi.org/10.2989/18142320309504014 |
container_title |
African Journal of Marine Science |
container_volume |
25 |
container_issue |
1 |
container_start_page |
253 |
op_container_end_page |
261 |
_version_ |
1766067919249211392 |