Postembryonic development of Apseudes heroae and Allotanais hirsutus (Tanaidacea, Crustacea) in Magellanic and sub-Antarctic waters
Apseudes heroae Sieg, 1986 (Family Apseudidae) and Allotanais hirsutus (Beddard, 1886) (Family Tanaidae) are common Tanaidacea of the southern Magellanic region. The aim of the investigation is to elucidate the postmarsupial development of these tanaid species that differ in their biogeography. Popu...
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crcambridgeupr:10.1017/s0954102002000019 2024-03-03T08:38:37+00:00 Postembryonic development of Apseudes heroae and Allotanais hirsutus (Tanaidacea, Crustacea) in Magellanic and sub-Antarctic waters SCHMIDT, ANJA SIEGEL, VOLKER BRANDT, ANGELIKA 2002 http://dx.doi.org/10.1017/s0954102002000019 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102002000019 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Antarctic Science volume 14, issue 3, page 201-211 ISSN 0954-1020 1365-2079 Geology Ecology, Evolution, Behavior and Systematics Oceanography journal-article 2002 crcambridgeupr https://doi.org/10.1017/s0954102002000019 2024-02-08T08:43:48Z Apseudes heroae Sieg, 1986 (Family Apseudidae) and Allotanais hirsutus (Beddard, 1886) (Family Tanaidae) are common Tanaidacea of the southern Magellanic region. The aim of the investigation is to elucidate the postmarsupial development of these tanaid species that differ in their biogeography. Population structures are analysed from size frequency data and from different postembryonic stages of specimens collected in the Atlantic entrance of the Beagle Channel and from the Atlantic continental slope to the south-east. The population of Apseudes heroae shows three age groups, the one of Allotanais hirsutus probably at least three. Some large specimens indicate that the latter sub-Antarctic species might reach an age of several years. Both species are probably gonochoristic, and protandric hermaphroditism was not observed. The fecundity of Apseudes heroae and Allotanais hirsutus was analysed. No significant correlation could be found between cephalothorax width and egg number or number of larvae. For both species hypothetical life cycles are reconstructed. As sub-Antarctic temperatures are low and seasonality is strong in the Magellanic region, it is possible that these species are reasonably adapted in reproduction as shown in some polar species of Isopoda and Cumacea. Article in Journal/Newspaper Antarc* Antarctic Antarctic Science Cambridge University Press Antarctic Antarctic Science 14 3 201 211 |
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Open Polar |
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Cambridge University Press |
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crcambridgeupr |
language |
English |
topic |
Geology Ecology, Evolution, Behavior and Systematics Oceanography |
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Geology Ecology, Evolution, Behavior and Systematics Oceanography SCHMIDT, ANJA SIEGEL, VOLKER BRANDT, ANGELIKA Postembryonic development of Apseudes heroae and Allotanais hirsutus (Tanaidacea, Crustacea) in Magellanic and sub-Antarctic waters |
topic_facet |
Geology Ecology, Evolution, Behavior and Systematics Oceanography |
description |
Apseudes heroae Sieg, 1986 (Family Apseudidae) and Allotanais hirsutus (Beddard, 1886) (Family Tanaidae) are common Tanaidacea of the southern Magellanic region. The aim of the investigation is to elucidate the postmarsupial development of these tanaid species that differ in their biogeography. Population structures are analysed from size frequency data and from different postembryonic stages of specimens collected in the Atlantic entrance of the Beagle Channel and from the Atlantic continental slope to the south-east. The population of Apseudes heroae shows three age groups, the one of Allotanais hirsutus probably at least three. Some large specimens indicate that the latter sub-Antarctic species might reach an age of several years. Both species are probably gonochoristic, and protandric hermaphroditism was not observed. The fecundity of Apseudes heroae and Allotanais hirsutus was analysed. No significant correlation could be found between cephalothorax width and egg number or number of larvae. For both species hypothetical life cycles are reconstructed. As sub-Antarctic temperatures are low and seasonality is strong in the Magellanic region, it is possible that these species are reasonably adapted in reproduction as shown in some polar species of Isopoda and Cumacea. |
format |
Article in Journal/Newspaper |
author |
SCHMIDT, ANJA SIEGEL, VOLKER BRANDT, ANGELIKA |
author_facet |
SCHMIDT, ANJA SIEGEL, VOLKER BRANDT, ANGELIKA |
author_sort |
SCHMIDT, ANJA |
title |
Postembryonic development of Apseudes heroae and Allotanais hirsutus (Tanaidacea, Crustacea) in Magellanic and sub-Antarctic waters |
title_short |
Postembryonic development of Apseudes heroae and Allotanais hirsutus (Tanaidacea, Crustacea) in Magellanic and sub-Antarctic waters |
title_full |
Postembryonic development of Apseudes heroae and Allotanais hirsutus (Tanaidacea, Crustacea) in Magellanic and sub-Antarctic waters |
title_fullStr |
Postembryonic development of Apseudes heroae and Allotanais hirsutus (Tanaidacea, Crustacea) in Magellanic and sub-Antarctic waters |
title_full_unstemmed |
Postembryonic development of Apseudes heroae and Allotanais hirsutus (Tanaidacea, Crustacea) in Magellanic and sub-Antarctic waters |
title_sort |
postembryonic development of apseudes heroae and allotanais hirsutus (tanaidacea, crustacea) in magellanic and sub-antarctic waters |
publisher |
Cambridge University Press (CUP) |
publishDate |
2002 |
url |
http://dx.doi.org/10.1017/s0954102002000019 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102002000019 |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic Antarctic Science |
genre_facet |
Antarc* Antarctic Antarctic Science |
op_source |
Antarctic Science volume 14, issue 3, page 201-211 ISSN 0954-1020 1365-2079 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1017/s0954102002000019 |
container_title |
Antarctic Science |
container_volume |
14 |
container_issue |
3 |
container_start_page |
201 |
op_container_end_page |
211 |
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1792507031998955520 |