Breeding season and early developmental stage of a urchin, Sterechinus neumayeri (Meissner), at Syowa Station, Antarctica
The breeding season and early developmental stage of a sea urchin, Sterechinus neumayeri, which is widely distributed in Antarctic coastal waters, were studied. A year-round sampling of the urchin was carried out at Syowa Station during the 40th Japanese Antarctic Research Expedition (JARE-40) over-...
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National Institute of Polar Research
2001
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Online Access: | https://doi.org/10.15094/00009164 https://doaj.org/article/8b6d4f9a218e45058b2d48cf1da93f3b |
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fttriple:oai:gotriple.eu:oai:doaj.org/article:8b6d4f9a218e45058b2d48cf1da93f3b 2023-05-15T13:42:17+02:00 Breeding season and early developmental stage of a urchin, Sterechinus neumayeri (Meissner), at Syowa Station, Antarctica Yasutaka Tsuchiya Sakae Kudoh Katsufumi Sato Mitsuo Fukuchi 2001-07-01 https://doi.org/10.15094/00009164 https://doaj.org/article/8b6d4f9a218e45058b2d48cf1da93f3b en other eng National Institute of Polar Research doi:10.15094/00009164 0085-7289 2432-079X https://doaj.org/article/8b6d4f9a218e45058b2d48cf1da93f3b undefined Antarctic Record, Vol 45, Iss 2, Pp 157-170 (2001) geo Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2001 fttriple https://doi.org/10.15094/00009164 2023-01-22T19:11:10Z The breeding season and early developmental stage of a sea urchin, Sterechinus neumayeri, which is widely distributed in Antarctic coastal waters, were studied. A year-round sampling of the urchin was carried out at Syowa Station during the 40th Japanese Antarctic Research Expedition (JARE-40) over-wintering period (February 1999-February 2000) using bait traps. The urchin entered into traps in both the autumn to mid-winter and late spring to summer periods, but not from late winter to early spring. According to the observed facts, that all individuals caught before mid-winter had mature sexual organs and that more than half of the collected urchins during late spring were post-spawning individuals, natural spawning seemed to occur from late winter to spring at the study site. In nearly freezing seawater, spawning and fertilization were experimentally induced using samples collected both in late autumn and late spring. The early development of the embryo was successfully observed for a month using the latter samples. The first cleavage occurred within 20 hours after insemination, and the successive development of the embryo reached the morula and blastula stages for 2 and 3 days, respectively. The embryo grew slowly and finally developed to a prism larva via the gastrula stage within 18 days after fertilization. Article in Journal/Newspaper Antarc* Antarctic Antarctica Unknown Antarctic Syowa Station |
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English |
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geo Yasutaka Tsuchiya Sakae Kudoh Katsufumi Sato Mitsuo Fukuchi Breeding season and early developmental stage of a urchin, Sterechinus neumayeri (Meissner), at Syowa Station, Antarctica |
topic_facet |
geo |
description |
The breeding season and early developmental stage of a sea urchin, Sterechinus neumayeri, which is widely distributed in Antarctic coastal waters, were studied. A year-round sampling of the urchin was carried out at Syowa Station during the 40th Japanese Antarctic Research Expedition (JARE-40) over-wintering period (February 1999-February 2000) using bait traps. The urchin entered into traps in both the autumn to mid-winter and late spring to summer periods, but not from late winter to early spring. According to the observed facts, that all individuals caught before mid-winter had mature sexual organs and that more than half of the collected urchins during late spring were post-spawning individuals, natural spawning seemed to occur from late winter to spring at the study site. In nearly freezing seawater, spawning and fertilization were experimentally induced using samples collected both in late autumn and late spring. The early development of the embryo was successfully observed for a month using the latter samples. The first cleavage occurred within 20 hours after insemination, and the successive development of the embryo reached the morula and blastula stages for 2 and 3 days, respectively. The embryo grew slowly and finally developed to a prism larva via the gastrula stage within 18 days after fertilization. |
format |
Article in Journal/Newspaper |
author |
Yasutaka Tsuchiya Sakae Kudoh Katsufumi Sato Mitsuo Fukuchi |
author_facet |
Yasutaka Tsuchiya Sakae Kudoh Katsufumi Sato Mitsuo Fukuchi |
author_sort |
Yasutaka Tsuchiya |
title |
Breeding season and early developmental stage of a urchin, Sterechinus neumayeri (Meissner), at Syowa Station, Antarctica |
title_short |
Breeding season and early developmental stage of a urchin, Sterechinus neumayeri (Meissner), at Syowa Station, Antarctica |
title_full |
Breeding season and early developmental stage of a urchin, Sterechinus neumayeri (Meissner), at Syowa Station, Antarctica |
title_fullStr |
Breeding season and early developmental stage of a urchin, Sterechinus neumayeri (Meissner), at Syowa Station, Antarctica |
title_full_unstemmed |
Breeding season and early developmental stage of a urchin, Sterechinus neumayeri (Meissner), at Syowa Station, Antarctica |
title_sort |
breeding season and early developmental stage of a urchin, sterechinus neumayeri (meissner), at syowa station, antarctica |
publisher |
National Institute of Polar Research |
publishDate |
2001 |
url |
https://doi.org/10.15094/00009164 https://doaj.org/article/8b6d4f9a218e45058b2d48cf1da93f3b |
geographic |
Antarctic Syowa Station |
geographic_facet |
Antarctic Syowa Station |
genre |
Antarc* Antarctic Antarctica |
genre_facet |
Antarc* Antarctic Antarctica |
op_source |
Antarctic Record, Vol 45, Iss 2, Pp 157-170 (2001) |
op_relation |
doi:10.15094/00009164 0085-7289 2432-079X https://doaj.org/article/8b6d4f9a218e45058b2d48cf1da93f3b |
op_rights |
undefined |
op_doi |
https://doi.org/10.15094/00009164 |
_version_ |
1766166072126341120 |