Evidence for egg brooding and parental care in icefish and other notothenioids in the Southern Ocean
One of the least known Antarctic fish species is the icefish Chionobathyscus dewitti described first in 1978. Some of its reproductive characteristics appear to be similar to other channichthyids of similar size and shape. Females close to spawning have gonado–somatic indices (GSIs) of more than 20,...
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Online Access: | http://dx.doi.org/10.1017/s0954102006000265 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102006000265 |
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crcambridgeupr:10.1017/s0954102006000265 2024-03-03T08:38:23+00:00 Evidence for egg brooding and parental care in icefish and other notothenioids in the Southern Ocean Kock, K.-H. Pshenichnov, L.K. Devries, A.L. 2006 http://dx.doi.org/10.1017/s0954102006000265 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102006000265 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Antarctic Science volume 18, issue 2, page 223-227 ISSN 0954-1020 1365-2079 Geology Ecology, Evolution, Behavior and Systematics Oceanography journal-article 2006 crcambridgeupr https://doi.org/10.1017/s0954102006000265 2024-02-08T08:29:36Z One of the least known Antarctic fish species is the icefish Chionobathyscus dewitti described first in 1978. Some of its reproductive characteristics appear to be similar to other channichthyids of similar size and shape. Females close to spawning have gonado–somatic indices (GSIs) of more than 20, and absolute fecundity was 2967 to 15612 oocytes in females 33–62 cm long. Relative fecundity was 7.6 in one female. Spawning has been observed in the Ross Sea at 1300 to 1500 m depth from January to March. Chionobathyscus dewitti may exhibit a remarkable egg carrying behaviour: eggs stick together in batches around the pelvic fins of females. The comparatively large number of mature males observed with no indication of an egg batch attached to their ventral fins makes it unlikely that males are involved in egg carrying. The few larvae of C. dewitti caught so far occurred from October onwards. Their size indicates that they have hatched as early as September. This suggests an incubation period of at least six months. We compare this with parental care reported in other notothenioids. Article in Journal/Newspaper Antarc* Antarctic Antarctic Science Icefish Ross Sea Southern Ocean Cambridge University Press Antarctic Southern Ocean Ross Sea Antarctic Science 18 2 223 227 |
institution |
Open Polar |
collection |
Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
topic |
Geology Ecology, Evolution, Behavior and Systematics Oceanography |
spellingShingle |
Geology Ecology, Evolution, Behavior and Systematics Oceanography Kock, K.-H. Pshenichnov, L.K. Devries, A.L. Evidence for egg brooding and parental care in icefish and other notothenioids in the Southern Ocean |
topic_facet |
Geology Ecology, Evolution, Behavior and Systematics Oceanography |
description |
One of the least known Antarctic fish species is the icefish Chionobathyscus dewitti described first in 1978. Some of its reproductive characteristics appear to be similar to other channichthyids of similar size and shape. Females close to spawning have gonado–somatic indices (GSIs) of more than 20, and absolute fecundity was 2967 to 15612 oocytes in females 33–62 cm long. Relative fecundity was 7.6 in one female. Spawning has been observed in the Ross Sea at 1300 to 1500 m depth from January to March. Chionobathyscus dewitti may exhibit a remarkable egg carrying behaviour: eggs stick together in batches around the pelvic fins of females. The comparatively large number of mature males observed with no indication of an egg batch attached to their ventral fins makes it unlikely that males are involved in egg carrying. The few larvae of C. dewitti caught so far occurred from October onwards. Their size indicates that they have hatched as early as September. This suggests an incubation period of at least six months. We compare this with parental care reported in other notothenioids. |
format |
Article in Journal/Newspaper |
author |
Kock, K.-H. Pshenichnov, L.K. Devries, A.L. |
author_facet |
Kock, K.-H. Pshenichnov, L.K. Devries, A.L. |
author_sort |
Kock, K.-H. |
title |
Evidence for egg brooding and parental care in icefish and other notothenioids in the Southern Ocean |
title_short |
Evidence for egg brooding and parental care in icefish and other notothenioids in the Southern Ocean |
title_full |
Evidence for egg brooding and parental care in icefish and other notothenioids in the Southern Ocean |
title_fullStr |
Evidence for egg brooding and parental care in icefish and other notothenioids in the Southern Ocean |
title_full_unstemmed |
Evidence for egg brooding and parental care in icefish and other notothenioids in the Southern Ocean |
title_sort |
evidence for egg brooding and parental care in icefish and other notothenioids in the southern ocean |
publisher |
Cambridge University Press (CUP) |
publishDate |
2006 |
url |
http://dx.doi.org/10.1017/s0954102006000265 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102006000265 |
geographic |
Antarctic Southern Ocean Ross Sea |
geographic_facet |
Antarctic Southern Ocean Ross Sea |
genre |
Antarc* Antarctic Antarctic Science Icefish Ross Sea Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctic Science Icefish Ross Sea Southern Ocean |
op_source |
Antarctic Science volume 18, issue 2, page 223-227 ISSN 0954-1020 1365-2079 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1017/s0954102006000265 |
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Antarctic Science |
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18 |
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2 |
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223 |
op_container_end_page |
227 |
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1792506764987465728 |