In situ growth rate estimates of Southern Ocean krill, Thysanoessa macrura
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...
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Cambridge Univ Press
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ftunivtasmania:oai:eprints.utas.edu.au:29715 2023-05-15T13:31:53+02:00 In situ growth rate estimates of Southern Ocean krill, Thysanoessa macrura Wallis, JR Melvin, JE King, R Kawaguchi, S 2019 https://eprints.utas.edu.au/29715/ unknown Cambridge Univ Press Wallis, JR orcid:0000-0003-2932-612X , Melvin, JE, King, R and Kawaguchi, S 2019 , 'In situ growth rate estimates of Southern Ocean krill, Thysanoessa macrura' , Antarctic Science , pp. 1-7 , doi:10.1017/S0954102019000063 <http://dx.doi.org/10.1017/S0954102019000063>. daily growth rate krill Southern Ocean instantaneous growth rate intermoult period Article PeerReviewed 2019 ftunivtasmania https://doi.org/10.1017/S0954102019000063 2021-09-13T22:19:23Z 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 University of Tasmania: UTas ePrints Antarctic Southern Ocean The Antarctic Antarctic Science 31 3 116 122 |
institution |
Open Polar |
collection |
University of Tasmania: UTas ePrints |
op_collection_id |
ftunivtasmania |
language |
unknown |
topic |
daily growth rate krill Southern Ocean instantaneous growth rate intermoult period |
spellingShingle |
daily growth rate krill Southern Ocean instantaneous growth rate intermoult period Wallis, JR Melvin, JE King, R Kawaguchi, S In situ growth rate estimates of Southern Ocean krill, Thysanoessa macrura |
topic_facet |
daily growth rate krill Southern Ocean instantaneous growth rate intermoult period |
description |
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, JR Melvin, JE King, R Kawaguchi, S |
author_facet |
Wallis, JR Melvin, JE King, R Kawaguchi, S |
author_sort |
Wallis, JR |
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 Univ Press |
publishDate |
2019 |
url |
https://eprints.utas.edu.au/29715/ |
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_relation |
Wallis, JR orcid:0000-0003-2932-612X , Melvin, JE, King, R and Kawaguchi, S 2019 , 'In situ growth rate estimates of Southern Ocean krill, Thysanoessa macrura' , Antarctic Science , pp. 1-7 , doi:10.1017/S0954102019000063 <http://dx.doi.org/10.1017/S0954102019000063>. |
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 |
_version_ |
1766021897235988480 |