Borers and encrusters as indicators of the presence of hermit crabs in Antarctic Eocene gastropods shells
Abstract The community of encrusting and boring organisms developed on shells of the gastropod Antarctodarwinella ellioti from the lower section of the La Meseta Formation (Eocene) exposed on Seymour (Marambio) Island, Antarctic Peninsula, allows inference that the shells were inhabited by hermit cr...
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Language: | English |
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Online Access: | http://dx.doi.org/10.1017/s0954102007000533 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102007000533 |
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crcambridgeupr:10.1017/s0954102007000533 2024-09-15T17:41:26+00:00 Borers and encrusters as indicators of the presence of hermit crabs in Antarctic Eocene gastropods shells Casadio, Silvio Parras, Ana Griffin, Miguel Marenssi, Sergio 2007 http://dx.doi.org/10.1017/s0954102007000533 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102007000533 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Antarctic Science volume 19, issue 3, page 297-309 ISSN 0954-1020 1365-2079 journal-article 2007 crcambridgeupr https://doi.org/10.1017/s0954102007000533 2024-07-03T04:04:10Z Abstract The community of encrusting and boring organisms developed on shells of the gastropod Antarctodarwinella ellioti from the lower section of the La Meseta Formation (Eocene) exposed on Seymour (Marambio) Island, Antarctic Peninsula, allows inference that the shells were inhabited by hermit crabs. A Chi-square Independence Test revealed that the community - dominated by polychaetes and bryozoans - shows preference for the aperture interior area of the shell. A subsequent Cochran Q Test indicated that the differences in frequency of encrusting and boring organisms as counted on the different interior sectors of the aperture were statistically significant. Thus, polychaetes, boring bryozoans, and encrusting bryozoans, do not show the same frequency in each interior sector of the aperture; they are more frequent on the columella ( P < 0.0001, P < 0.01 and P < 0.001 respectively). Encrusting bryozoans also appear to show a preference - albeit not as high as on the columella - for the outer lip. This community of boring and encrusting organisms and their distribution on the shell confirms that the shells were inhabited by hermit crabs. The community is similar to that described in Recent hermitted shells from mid-latitude temperate water environments, suggesting that such communities were already established in the Eocene. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Antarctic Science Cambridge University Press Antarctic Science 19 3 297 309 |
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Open Polar |
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Cambridge University Press |
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crcambridgeupr |
language |
English |
description |
Abstract The community of encrusting and boring organisms developed on shells of the gastropod Antarctodarwinella ellioti from the lower section of the La Meseta Formation (Eocene) exposed on Seymour (Marambio) Island, Antarctic Peninsula, allows inference that the shells were inhabited by hermit crabs. A Chi-square Independence Test revealed that the community - dominated by polychaetes and bryozoans - shows preference for the aperture interior area of the shell. A subsequent Cochran Q Test indicated that the differences in frequency of encrusting and boring organisms as counted on the different interior sectors of the aperture were statistically significant. Thus, polychaetes, boring bryozoans, and encrusting bryozoans, do not show the same frequency in each interior sector of the aperture; they are more frequent on the columella ( P < 0.0001, P < 0.01 and P < 0.001 respectively). Encrusting bryozoans also appear to show a preference - albeit not as high as on the columella - for the outer lip. This community of boring and encrusting organisms and their distribution on the shell confirms that the shells were inhabited by hermit crabs. The community is similar to that described in Recent hermitted shells from mid-latitude temperate water environments, suggesting that such communities were already established in the Eocene. |
format |
Article in Journal/Newspaper |
author |
Casadio, Silvio Parras, Ana Griffin, Miguel Marenssi, Sergio |
spellingShingle |
Casadio, Silvio Parras, Ana Griffin, Miguel Marenssi, Sergio Borers and encrusters as indicators of the presence of hermit crabs in Antarctic Eocene gastropods shells |
author_facet |
Casadio, Silvio Parras, Ana Griffin, Miguel Marenssi, Sergio |
author_sort |
Casadio, Silvio |
title |
Borers and encrusters as indicators of the presence of hermit crabs in Antarctic Eocene gastropods shells |
title_short |
Borers and encrusters as indicators of the presence of hermit crabs in Antarctic Eocene gastropods shells |
title_full |
Borers and encrusters as indicators of the presence of hermit crabs in Antarctic Eocene gastropods shells |
title_fullStr |
Borers and encrusters as indicators of the presence of hermit crabs in Antarctic Eocene gastropods shells |
title_full_unstemmed |
Borers and encrusters as indicators of the presence of hermit crabs in Antarctic Eocene gastropods shells |
title_sort |
borers and encrusters as indicators of the presence of hermit crabs in antarctic eocene gastropods shells |
publisher |
Cambridge University Press (CUP) |
publishDate |
2007 |
url |
http://dx.doi.org/10.1017/s0954102007000533 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102007000533 |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctic Science |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctic Science |
op_source |
Antarctic Science volume 19, issue 3, page 297-309 ISSN 0954-1020 1365-2079 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1017/s0954102007000533 |
container_title |
Antarctic Science |
container_volume |
19 |
container_issue |
3 |
container_start_page |
297 |
op_container_end_page |
309 |
_version_ |
1810487605863645184 |