Reproductive biology of the Antarctic “sea pen” Malacobelemnon daytoni (Octocorallia, Pennatulacea, Kophobelemnidae)
The reproductive biology of the sea pen Malacobelemnon daytoni was studied at Potter Cove, South Shetland Islands, where it is one of the dominant species in shallow waters. Specimens collected at 15–22 m depth were examined by histological analysis. M. daytoni is gonochoristic and exhibited a sex r...
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Norwegian Polar Institute
2013
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Online Access: | https://doi.org/10.3402/polar.v32i0.20040 https://doaj.org/article/1e0d81b6dbb241fa85cba45a6470988d |
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fttriple:oai:gotriple.eu:oai:doaj.org/article:1e0d81b6dbb241fa85cba45a6470988d 2023-05-15T14:00:43+02:00 Reproductive biology of the Antarctic “sea pen” Malacobelemnon daytoni (Octocorallia, Pennatulacea, Kophobelemnidae) Ricardo Sahade Natalia Servetto Luciana Torre 2013-08-01 https://doi.org/10.3402/polar.v32i0.20040 https://doaj.org/article/1e0d81b6dbb241fa85cba45a6470988d en eng Norwegian Polar Institute doi:10.3402/polar.v32i0.20040 0800-0395 1751-8369 https://doaj.org/article/1e0d81b6dbb241fa85cba45a6470988d undefined Polar Research, Vol 32, Iss 0, Pp 1-11 (2013) Antarctica benthic communities Pennatulacea reproduction oogenesis geo envir Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2013 fttriple https://doi.org/10.3402/polar.v32i0.20040 2023-01-22T17:58:07Z The reproductive biology of the sea pen Malacobelemnon daytoni was studied at Potter Cove, South Shetland Islands, where it is one of the dominant species in shallow waters. Specimens collected at 15–22 m depth were examined by histological analysis. M. daytoni is gonochoristic and exhibited a sex ratio of 1:1. Oocyte sizes (>300 µm) and the absence of embryos or newly developed larvae in the colonies suggest that this species can have lecithotrophic larvae and experience external fertilization. This life strategy is in line with other members of the group and supports the hypothesis that this could be a phylogenetically fixed trait for pennatulids. It was observed that oocytes were generated by gastrodermic tissue and released to the longitudinal canal. Thereafter, they migrate along the canal until they reach maturity and are released by autozooids at the top of the colonies. This striking feature has not yet been reported for other pennatulaceans. Mature oocytes were observed from colonies of 15 mm in length, suggesting that sexual maturity can be reached rapidly. This is contrary to what is hypothesized for the vast majority of Antarctic benthic invertebrates, namely that rates of activities associated with development, reproduction and growth are almost universally very slow. This strategy may also explain the ecological success of M. daytoni in areas with high ice impact as in the shallow waters of Potter Cove. Article in Journal/Newspaper Antarc* Antarctic Antarctica Polar Research South Shetland Islands Unknown Antarctic Potter Cove South Shetland Islands The Antarctic Polar Research 32 1 20040 |
institution |
Open Polar |
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Unknown |
op_collection_id |
fttriple |
language |
English |
topic |
Antarctica benthic communities Pennatulacea reproduction oogenesis geo envir |
spellingShingle |
Antarctica benthic communities Pennatulacea reproduction oogenesis geo envir Ricardo Sahade Natalia Servetto Luciana Torre Reproductive biology of the Antarctic “sea pen” Malacobelemnon daytoni (Octocorallia, Pennatulacea, Kophobelemnidae) |
topic_facet |
Antarctica benthic communities Pennatulacea reproduction oogenesis geo envir |
description |
The reproductive biology of the sea pen Malacobelemnon daytoni was studied at Potter Cove, South Shetland Islands, where it is one of the dominant species in shallow waters. Specimens collected at 15–22 m depth were examined by histological analysis. M. daytoni is gonochoristic and exhibited a sex ratio of 1:1. Oocyte sizes (>300 µm) and the absence of embryos or newly developed larvae in the colonies suggest that this species can have lecithotrophic larvae and experience external fertilization. This life strategy is in line with other members of the group and supports the hypothesis that this could be a phylogenetically fixed trait for pennatulids. It was observed that oocytes were generated by gastrodermic tissue and released to the longitudinal canal. Thereafter, they migrate along the canal until they reach maturity and are released by autozooids at the top of the colonies. This striking feature has not yet been reported for other pennatulaceans. Mature oocytes were observed from colonies of 15 mm in length, suggesting that sexual maturity can be reached rapidly. This is contrary to what is hypothesized for the vast majority of Antarctic benthic invertebrates, namely that rates of activities associated with development, reproduction and growth are almost universally very slow. This strategy may also explain the ecological success of M. daytoni in areas with high ice impact as in the shallow waters of Potter Cove. |
format |
Article in Journal/Newspaper |
author |
Ricardo Sahade Natalia Servetto Luciana Torre |
author_facet |
Ricardo Sahade Natalia Servetto Luciana Torre |
author_sort |
Ricardo Sahade |
title |
Reproductive biology of the Antarctic “sea pen” Malacobelemnon daytoni (Octocorallia, Pennatulacea, Kophobelemnidae) |
title_short |
Reproductive biology of the Antarctic “sea pen” Malacobelemnon daytoni (Octocorallia, Pennatulacea, Kophobelemnidae) |
title_full |
Reproductive biology of the Antarctic “sea pen” Malacobelemnon daytoni (Octocorallia, Pennatulacea, Kophobelemnidae) |
title_fullStr |
Reproductive biology of the Antarctic “sea pen” Malacobelemnon daytoni (Octocorallia, Pennatulacea, Kophobelemnidae) |
title_full_unstemmed |
Reproductive biology of the Antarctic “sea pen” Malacobelemnon daytoni (Octocorallia, Pennatulacea, Kophobelemnidae) |
title_sort |
reproductive biology of the antarctic “sea pen” malacobelemnon daytoni (octocorallia, pennatulacea, kophobelemnidae) |
publisher |
Norwegian Polar Institute |
publishDate |
2013 |
url |
https://doi.org/10.3402/polar.v32i0.20040 https://doaj.org/article/1e0d81b6dbb241fa85cba45a6470988d |
geographic |
Antarctic Potter Cove South Shetland Islands The Antarctic |
geographic_facet |
Antarctic Potter Cove South Shetland Islands The Antarctic |
genre |
Antarc* Antarctic Antarctica Polar Research South Shetland Islands |
genre_facet |
Antarc* Antarctic Antarctica Polar Research South Shetland Islands |
op_source |
Polar Research, Vol 32, Iss 0, Pp 1-11 (2013) |
op_relation |
doi:10.3402/polar.v32i0.20040 0800-0395 1751-8369 https://doaj.org/article/1e0d81b6dbb241fa85cba45a6470988d |
op_rights |
undefined |
op_doi |
https://doi.org/10.3402/polar.v32i0.20040 |
container_title |
Polar Research |
container_volume |
32 |
container_issue |
1 |
container_start_page |
20040 |
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1766270059639996416 |