Circumpolar occurrence of eugregarinid protozoan Cephaloidophora pacificaassociated with Antarctic krill, Euphausia superba
Abstract The geographical distribution of protozoan parasite Cephaloidophora pacifica Avdeev (Order Eugregarininda) associated with Antarctic krill, Euphausia superba , was examined in samples collected from the vicinity of the Antarctic Peninsula, near Syowa Station, and Pacific and Indian sectors...
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Language: | English |
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Cambridge University Press (CUP)
2008
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Online Access: | http://dx.doi.org/10.1017/s0954102008001016 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102008001016 |
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crcambridgeupr:10.1017/s0954102008001016 2024-09-15T17:47:41+00:00 Circumpolar occurrence of eugregarinid protozoan Cephaloidophora pacificaassociated with Antarctic krill, Euphausia superba Takahashi, Kunio T. Kobayashi, Masaki Kawaguchi, So Saigusa, Junko Tanimura, Atsushi Fukuchi, Mitsuo Naganobu, Mikio Toda, Tatsuki 2008 http://dx.doi.org/10.1017/s0954102008001016 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102008001016 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Antarctic Science volume 20, issue 5, page 437-440 ISSN 0954-1020 1365-2079 journal-article 2008 crcambridgeupr https://doi.org/10.1017/s0954102008001016 2024-08-28T04:03:16Z Abstract The geographical distribution of protozoan parasite Cephaloidophora pacifica Avdeev (Order Eugregarininda) associated with Antarctic krill, Euphausia superba , was examined in samples collected from the vicinity of the Antarctic Peninsula, near Syowa Station, and Pacific and Indian sectors of the Southern Ocean. Cephaloidophora pacifica was found at all stations around the Antarctic, with 96.4% of the euphausiids infected ( n = 195). The numbers of C. pacifica per krill ranged from 0 to 8089 krill -1 , and the average was 350.0 ± 787.8 (mean ± SD). The frequency distributions of C. pacifica showed an overdispersed parasite population (i.e. the variance was greater than the mean) at all locations. Statistical analysis showed that whilst the geographical location did not have a significant effect on intensity of C. pacifica the maturity stage of krill did, with an increasing intensity of infection as krill matures. The infestation of E. superba by eugregarinid protozoan is considered to be a circum-Antarctic phenomenon, and it occurs equally throughout the Southern Ocean. Article in Journal/Newspaper Antarc* Antarctic Antarctic Krill Antarctic Peninsula Antarctic Science Euphausia superba Southern Ocean Cambridge University Press Antarctic Science 20 5 437 440 |
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Open Polar |
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Cambridge University Press |
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crcambridgeupr |
language |
English |
description |
Abstract The geographical distribution of protozoan parasite Cephaloidophora pacifica Avdeev (Order Eugregarininda) associated with Antarctic krill, Euphausia superba , was examined in samples collected from the vicinity of the Antarctic Peninsula, near Syowa Station, and Pacific and Indian sectors of the Southern Ocean. Cephaloidophora pacifica was found at all stations around the Antarctic, with 96.4% of the euphausiids infected ( n = 195). The numbers of C. pacifica per krill ranged from 0 to 8089 krill -1 , and the average was 350.0 ± 787.8 (mean ± SD). The frequency distributions of C. pacifica showed an overdispersed parasite population (i.e. the variance was greater than the mean) at all locations. Statistical analysis showed that whilst the geographical location did not have a significant effect on intensity of C. pacifica the maturity stage of krill did, with an increasing intensity of infection as krill matures. The infestation of E. superba by eugregarinid protozoan is considered to be a circum-Antarctic phenomenon, and it occurs equally throughout the Southern Ocean. |
format |
Article in Journal/Newspaper |
author |
Takahashi, Kunio T. Kobayashi, Masaki Kawaguchi, So Saigusa, Junko Tanimura, Atsushi Fukuchi, Mitsuo Naganobu, Mikio Toda, Tatsuki |
spellingShingle |
Takahashi, Kunio T. Kobayashi, Masaki Kawaguchi, So Saigusa, Junko Tanimura, Atsushi Fukuchi, Mitsuo Naganobu, Mikio Toda, Tatsuki Circumpolar occurrence of eugregarinid protozoan Cephaloidophora pacificaassociated with Antarctic krill, Euphausia superba |
author_facet |
Takahashi, Kunio T. Kobayashi, Masaki Kawaguchi, So Saigusa, Junko Tanimura, Atsushi Fukuchi, Mitsuo Naganobu, Mikio Toda, Tatsuki |
author_sort |
Takahashi, Kunio T. |
title |
Circumpolar occurrence of eugregarinid protozoan Cephaloidophora pacificaassociated with Antarctic krill, Euphausia superba |
title_short |
Circumpolar occurrence of eugregarinid protozoan Cephaloidophora pacificaassociated with Antarctic krill, Euphausia superba |
title_full |
Circumpolar occurrence of eugregarinid protozoan Cephaloidophora pacificaassociated with Antarctic krill, Euphausia superba |
title_fullStr |
Circumpolar occurrence of eugregarinid protozoan Cephaloidophora pacificaassociated with Antarctic krill, Euphausia superba |
title_full_unstemmed |
Circumpolar occurrence of eugregarinid protozoan Cephaloidophora pacificaassociated with Antarctic krill, Euphausia superba |
title_sort |
circumpolar occurrence of eugregarinid protozoan cephaloidophora pacificaassociated with antarctic krill, euphausia superba |
publisher |
Cambridge University Press (CUP) |
publishDate |
2008 |
url |
http://dx.doi.org/10.1017/s0954102008001016 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102008001016 |
genre |
Antarc* Antarctic Antarctic Krill Antarctic Peninsula Antarctic Science Euphausia superba Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctic Krill Antarctic Peninsula Antarctic Science Euphausia superba Southern Ocean |
op_source |
Antarctic Science volume 20, issue 5, page 437-440 ISSN 0954-1020 1365-2079 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1017/s0954102008001016 |
container_title |
Antarctic Science |
container_volume |
20 |
container_issue |
5 |
container_start_page |
437 |
op_container_end_page |
440 |
_version_ |
1810497160666415104 |