In situ growth rate estimates of Southern Ocean krill, Thysanoessa macrura
Abstract Growth, which is intrinsically linked to environmental conditions including temperature and food availability are highly variable both temporally and spatially. Estimates of growth rates of the Southern Ocean euphausiid Thysanoessa macrura are currently restricted to limited studies which r...
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crcambridgeupr:10.1017/s0954102019000063 2024-03-03T08:38:29+00:00 In situ growth rate estimates of Southern Ocean krill, Thysanoessa macrura Wallis, Jake R. Melvin, Jessica E. King, Robert Kawaguchi, So 2019 http://dx.doi.org/10.1017/s0954102019000063 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102019000063 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms https://www.cambridge.org/core/terms Antarctic Science volume 31, issue 3, page 116-122 ISSN 0954-1020 1365-2079 Geology Ecology, Evolution, Behavior and Systematics Oceanography journal-article 2019 crcambridgeupr https://doi.org/10.1017/s0954102019000063 2024-02-08T08:26:33Z Abstract Growth, which is intrinsically linked to environmental conditions including temperature and food availability are highly variable both temporally and spatially. Estimates of growth rates of the Southern Ocean euphausiid Thysanoessa macrura are currently restricted to limited studies which rely upon repeated sampling and length-frequency analysis to quantify growth rates. The instantaneous growth method (IGR) was used to measure the growth rate of T. macrura successfully in the southern Kerulen Plateau region during summer, providing the first IGR parameters for the Southern Ocean euphausiid species. Results of the four-day IGR incubation indicate a period of low somatic growth for adult T. macrura . Males had a longer intermoult period (IMP) (62 days) than females (42 days), but the sexes exhibited similar daily growth rates of 0.011 mm day −1 and 0.012 mm day −1 respectively. Juveniles exhibited the fastest growth, with an IMP of 13 days and daily growth rate of 0.055 mm day −1 indicating a prolonged growth season, similar to the Antarctic krill E. superba . Consequently, we highlight the usability of the IGR method and strongly encourage its use in developing a comprehensive understanding of spatial and seasonal growth patterns of T. macrura . Article in Journal/Newspaper Antarc* Antarctic Antarctic Krill Antarctic Science Southern Ocean Thysanoessa macrura Cambridge University Press Antarctic Southern Ocean The Antarctic Antarctic Science 31 3 116 122 |
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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 Wallis, Jake R. Melvin, Jessica E. King, Robert Kawaguchi, So In situ growth rate estimates of Southern Ocean krill, Thysanoessa macrura |
topic_facet |
Geology Ecology, Evolution, Behavior and Systematics Oceanography |
description |
Abstract Growth, which is intrinsically linked to environmental conditions including temperature and food availability are highly variable both temporally and spatially. Estimates of growth rates of the Southern Ocean euphausiid Thysanoessa macrura are currently restricted to limited studies which rely upon repeated sampling and length-frequency analysis to quantify growth rates. The instantaneous growth method (IGR) was used to measure the growth rate of T. macrura successfully in the southern Kerulen Plateau region during summer, providing the first IGR parameters for the Southern Ocean euphausiid species. Results of the four-day IGR incubation indicate a period of low somatic growth for adult T. macrura . Males had a longer intermoult period (IMP) (62 days) than females (42 days), but the sexes exhibited similar daily growth rates of 0.011 mm day −1 and 0.012 mm day −1 respectively. Juveniles exhibited the fastest growth, with an IMP of 13 days and daily growth rate of 0.055 mm day −1 indicating a prolonged growth season, similar to the Antarctic krill E. superba . Consequently, we highlight the usability of the IGR method and strongly encourage its use in developing a comprehensive understanding of spatial and seasonal growth patterns of T. macrura . |
format |
Article in Journal/Newspaper |
author |
Wallis, Jake R. Melvin, Jessica E. King, Robert Kawaguchi, So |
author_facet |
Wallis, Jake R. Melvin, Jessica E. King, Robert Kawaguchi, So |
author_sort |
Wallis, Jake R. |
title |
In situ growth rate estimates of Southern Ocean krill, Thysanoessa macrura |
title_short |
In situ growth rate estimates of Southern Ocean krill, Thysanoessa macrura |
title_full |
In situ growth rate estimates of Southern Ocean krill, Thysanoessa macrura |
title_fullStr |
In situ growth rate estimates of Southern Ocean krill, Thysanoessa macrura |
title_full_unstemmed |
In situ growth rate estimates of Southern Ocean krill, Thysanoessa macrura |
title_sort |
in situ growth rate estimates of southern ocean krill, thysanoessa macrura |
publisher |
Cambridge University Press (CUP) |
publishDate |
2019 |
url |
http://dx.doi.org/10.1017/s0954102019000063 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102019000063 |
geographic |
Antarctic Southern Ocean The Antarctic |
geographic_facet |
Antarctic Southern Ocean The Antarctic |
genre |
Antarc* Antarctic Antarctic Krill Antarctic Science Southern Ocean Thysanoessa macrura |
genre_facet |
Antarc* Antarctic Antarctic Krill Antarctic Science Southern Ocean Thysanoessa macrura |
op_source |
Antarctic Science volume 31, issue 3, page 116-122 ISSN 0954-1020 1365-2079 |
op_rights |
https://www.cambridge.org/core/terms https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1017/s0954102019000063 |
container_title |
Antarctic Science |
container_volume |
31 |
container_issue |
3 |
container_start_page |
116 |
op_container_end_page |
122 |
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1792506872496914432 |