Otolith structural and chemical analyses: the key to resolving age and growth of the Antarctic silverfish, Pleuragramma antarcticum
The various life history stages of the Weddell Sea population of Pleuragramma antarcticum were sampled to investigate life-history patterns of this ecologically important polar fish. Otoliths were examined for size, morphology and microstructure. Age determination of Antarctic fishes has proved to b...
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Cambridge University Press (CUP)
1993
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Online Access: | http://dx.doi.org/10.1017/s0954102093000082 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102093000082 |
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crcambridgeupr:10.1017/s0954102093000082 2024-03-03T08:38:22+00:00 Otolith structural and chemical analyses: the key to resolving age and growth of the Antarctic silverfish, Pleuragramma antarcticum Radtke, Richard L. Hubold, Gerd Folsom, Scott D. Lenz, Petra H. 1993 http://dx.doi.org/10.1017/s0954102093000082 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102093000082 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Antarctic Science volume 5, issue 1, page 51-62 ISSN 0954-1020 1365-2079 Geology Ecology, Evolution, Behavior and Systematics Oceanography journal-article 1993 crcambridgeupr https://doi.org/10.1017/s0954102093000082 2024-02-08T08:34:59Z The various life history stages of the Weddell Sea population of Pleuragramma antarcticum were sampled to investigate life-history patterns of this ecologically important polar fish. Otoliths were examined for size, morphology and microstructure. Age determination of Antarctic fishes has proved to be difficult because of small ambient temperature fluctuations. External and internal examination of otoliths by scanning electron microscopy revealed internal increments (assumed to be daily) and hatching marks. Back calculation of hatching dates from otolith increments, suggested a hatching season from September-November, with recruitment to the adult population at three to five years of age. Growth data conformed well to the von Bertalanffy equation. Fish grew slowly, with the largest fish attaining ages of more than 30 years. A multivariate mathematical model relating age to otolith morphometrics and fish size proved reliable, making it possible to age large sample sizes of fish. Limited elemental microprobe data obtained from two otoliths demonstrated patterns which may be useful in indicating the environmental life history of individual fish. These collective data suggest that the ecological importance of populations of Pleuragramma antarcticum is most likely due to a long life span and high lifetime reproduction rate. Article in Journal/Newspaper Antarc* Antarctic Antarctic Science Antarctic silverfish Weddell Sea Cambridge University Press Antarctic The Antarctic Weddell Sea Weddell Antarctic Science 5 1 51 62 |
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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 |
spellingShingle |
Geology Ecology, Evolution, Behavior and Systematics Oceanography Radtke, Richard L. Hubold, Gerd Folsom, Scott D. Lenz, Petra H. Otolith structural and chemical analyses: the key to resolving age and growth of the Antarctic silverfish, Pleuragramma antarcticum |
topic_facet |
Geology Ecology, Evolution, Behavior and Systematics Oceanography |
description |
The various life history stages of the Weddell Sea population of Pleuragramma antarcticum were sampled to investigate life-history patterns of this ecologically important polar fish. Otoliths were examined for size, morphology and microstructure. Age determination of Antarctic fishes has proved to be difficult because of small ambient temperature fluctuations. External and internal examination of otoliths by scanning electron microscopy revealed internal increments (assumed to be daily) and hatching marks. Back calculation of hatching dates from otolith increments, suggested a hatching season from September-November, with recruitment to the adult population at three to five years of age. Growth data conformed well to the von Bertalanffy equation. Fish grew slowly, with the largest fish attaining ages of more than 30 years. A multivariate mathematical model relating age to otolith morphometrics and fish size proved reliable, making it possible to age large sample sizes of fish. Limited elemental microprobe data obtained from two otoliths demonstrated patterns which may be useful in indicating the environmental life history of individual fish. These collective data suggest that the ecological importance of populations of Pleuragramma antarcticum is most likely due to a long life span and high lifetime reproduction rate. |
format |
Article in Journal/Newspaper |
author |
Radtke, Richard L. Hubold, Gerd Folsom, Scott D. Lenz, Petra H. |
author_facet |
Radtke, Richard L. Hubold, Gerd Folsom, Scott D. Lenz, Petra H. |
author_sort |
Radtke, Richard L. |
title |
Otolith structural and chemical analyses: the key to resolving age and growth of the Antarctic silverfish, Pleuragramma antarcticum |
title_short |
Otolith structural and chemical analyses: the key to resolving age and growth of the Antarctic silverfish, Pleuragramma antarcticum |
title_full |
Otolith structural and chemical analyses: the key to resolving age and growth of the Antarctic silverfish, Pleuragramma antarcticum |
title_fullStr |
Otolith structural and chemical analyses: the key to resolving age and growth of the Antarctic silverfish, Pleuragramma antarcticum |
title_full_unstemmed |
Otolith structural and chemical analyses: the key to resolving age and growth of the Antarctic silverfish, Pleuragramma antarcticum |
title_sort |
otolith structural and chemical analyses: the key to resolving age and growth of the antarctic silverfish, pleuragramma antarcticum |
publisher |
Cambridge University Press (CUP) |
publishDate |
1993 |
url |
http://dx.doi.org/10.1017/s0954102093000082 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102093000082 |
geographic |
Antarctic The Antarctic Weddell Sea Weddell |
geographic_facet |
Antarctic The Antarctic Weddell Sea Weddell |
genre |
Antarc* Antarctic Antarctic Science Antarctic silverfish Weddell Sea |
genre_facet |
Antarc* Antarctic Antarctic Science Antarctic silverfish Weddell Sea |
op_source |
Antarctic Science volume 5, issue 1, page 51-62 ISSN 0954-1020 1365-2079 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1017/s0954102093000082 |
container_title |
Antarctic Science |
container_volume |
5 |
container_issue |
1 |
container_start_page |
51 |
op_container_end_page |
62 |
_version_ |
1792506754330787840 |