Early life history of the ocellated icefish, Chionodraco rastrospinosus, off the Antarctic Peninsula
Abstract Age, growth and feeding habits of early life stages of Chionodraco rastrospinosus Dewitt & Hureau, the most abundant channichthyid in the larval fish assemblages of the Bransfield Strait, were studied by otolith microincrement counts and stomach content analyses. Individuals measuring 3...
Published in: | Antarctic Science |
---|---|
Main Authors: | , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Cambridge University Press (CUP)
2013
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1017/s0954102012001095 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102012001095 |
id |
crcambridgeupr:10.1017/s0954102012001095 |
---|---|
record_format |
openpolar |
spelling |
crcambridgeupr:10.1017/s0954102012001095 2024-06-23T07:46:51+00:00 Early life history of the ocellated icefish, Chionodraco rastrospinosus, off the Antarctic Peninsula La Mesa, Mario Catalano, Barbara Jones, Christopher D. 2013 http://dx.doi.org/10.1017/s0954102012001095 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102012001095 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Antarctic Science volume 25, issue 3, page 373-380 ISSN 0954-1020 1365-2079 journal-article 2013 crcambridgeupr https://doi.org/10.1017/s0954102012001095 2024-05-29T08:09:23Z Abstract Age, growth and feeding habits of early life stages of Chionodraco rastrospinosus Dewitt & Hureau, the most abundant channichthyid in the larval fish assemblages of the Bransfield Strait, were studied by otolith microincrement counts and stomach content analyses. Individuals measuring 39–69 mm standard length were caught in the uppermost depth strata down to 300 m from Brabant to Joinville islands along the northern Antarctic Peninsula. The sample consisted of post-larvae and juveniles aged 105–211 days, with a mean growth rate of 0.25 mm day -1 . Larval size at hatching was estimated to be c. 17.2 mm. Hatching was spread over a relatively long period from August–November. Sagittal otoliths were characterized by a strong check located at 23–52 microincrements of distance from the core, tentatively associated with the onset of first exogenous feeding. The relatively long period during which larvae can rely on yolk reserves and the large size at hatching enable them to utilize a wide size range of prey, as well as cope with occasional food shortages. The stomach contents consisted exclusively of euphausiids (furcilia and adults) and larvae of Pleuragramma antarcticum Boulenger. Based on growth rate, the residence time in pelagic waters of juvenile C. rastrospinosus was estimated to be about a year and a half. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Antarctic Science Bransfield Strait Icefish Cambridge University Press Antarctic Antarctic Peninsula Brabant ENVELOPE(-62.333,-62.333,-64.250,-64.250) Bransfield Strait DeWitt ENVELOPE(159.833,159.833,-77.200,-77.200) Joinville ENVELOPE(-55.867,-55.867,-63.250,-63.250) The Antarctic Antarctic Science 25 3 373 380 |
institution |
Open Polar |
collection |
Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
description |
Abstract Age, growth and feeding habits of early life stages of Chionodraco rastrospinosus Dewitt & Hureau, the most abundant channichthyid in the larval fish assemblages of the Bransfield Strait, were studied by otolith microincrement counts and stomach content analyses. Individuals measuring 39–69 mm standard length were caught in the uppermost depth strata down to 300 m from Brabant to Joinville islands along the northern Antarctic Peninsula. The sample consisted of post-larvae and juveniles aged 105–211 days, with a mean growth rate of 0.25 mm day -1 . Larval size at hatching was estimated to be c. 17.2 mm. Hatching was spread over a relatively long period from August–November. Sagittal otoliths were characterized by a strong check located at 23–52 microincrements of distance from the core, tentatively associated with the onset of first exogenous feeding. The relatively long period during which larvae can rely on yolk reserves and the large size at hatching enable them to utilize a wide size range of prey, as well as cope with occasional food shortages. The stomach contents consisted exclusively of euphausiids (furcilia and adults) and larvae of Pleuragramma antarcticum Boulenger. Based on growth rate, the residence time in pelagic waters of juvenile C. rastrospinosus was estimated to be about a year and a half. |
format |
Article in Journal/Newspaper |
author |
La Mesa, Mario Catalano, Barbara Jones, Christopher D. |
spellingShingle |
La Mesa, Mario Catalano, Barbara Jones, Christopher D. Early life history of the ocellated icefish, Chionodraco rastrospinosus, off the Antarctic Peninsula |
author_facet |
La Mesa, Mario Catalano, Barbara Jones, Christopher D. |
author_sort |
La Mesa, Mario |
title |
Early life history of the ocellated icefish, Chionodraco rastrospinosus, off the Antarctic Peninsula |
title_short |
Early life history of the ocellated icefish, Chionodraco rastrospinosus, off the Antarctic Peninsula |
title_full |
Early life history of the ocellated icefish, Chionodraco rastrospinosus, off the Antarctic Peninsula |
title_fullStr |
Early life history of the ocellated icefish, Chionodraco rastrospinosus, off the Antarctic Peninsula |
title_full_unstemmed |
Early life history of the ocellated icefish, Chionodraco rastrospinosus, off the Antarctic Peninsula |
title_sort |
early life history of the ocellated icefish, chionodraco rastrospinosus, off the antarctic peninsula |
publisher |
Cambridge University Press (CUP) |
publishDate |
2013 |
url |
http://dx.doi.org/10.1017/s0954102012001095 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102012001095 |
long_lat |
ENVELOPE(-62.333,-62.333,-64.250,-64.250) ENVELOPE(159.833,159.833,-77.200,-77.200) ENVELOPE(-55.867,-55.867,-63.250,-63.250) |
geographic |
Antarctic Antarctic Peninsula Brabant Bransfield Strait DeWitt Joinville The Antarctic |
geographic_facet |
Antarctic Antarctic Peninsula Brabant Bransfield Strait DeWitt Joinville The Antarctic |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctic Science Bransfield Strait Icefish |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctic Science Bransfield Strait Icefish |
op_source |
Antarctic Science volume 25, issue 3, page 373-380 ISSN 0954-1020 1365-2079 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1017/s0954102012001095 |
container_title |
Antarctic Science |
container_volume |
25 |
container_issue |
3 |
container_start_page |
373 |
op_container_end_page |
380 |
_version_ |
1802648774022004736 |