Heart rate as a measure of stress in Antarctic krill, Euphausia superba
Antarctic krill, Euphausia superba, normally live in social aggregations (schools) but rarely aggregate in laboratory tanks. In order to study the effect of stress on solitary living we tethered krill to wooden skewers and measured heart rate both when they were held isolated from conspecifics and w...
Published in: | Journal of the Marine Biological Association of the United Kingdom |
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Online Access: | https://doi.org/10.1017/S002531540300715Xh http://ecite.utas.edu.au/25590 |
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ftunivtasecite:oai:ecite.utas.edu.au:25590 2023-05-15T13:59:07+02:00 Heart rate as a measure of stress in Antarctic krill, Euphausia superba Ritz, DA Newman, L Swadling, KM Nicol, S Osborn, JE 2003 https://doi.org/10.1017/S002531540300715Xh http://ecite.utas.edu.au/25590 en eng Cambridge University Press http://dx.doi.org/10.1017/S002531540300715Xh Ritz, DA and Newman, L and Swadling, KM and Nicol, S and Osborn, JE, Heart rate as a measure of stress in Antarctic krill, Euphausia superba , Journal of the Marine Biological Association of the United Kingdom, 83, (2) pp. 329-330 . ISSN 0025-3154 (2003) [Refereed Article] http://ecite.utas.edu.au/25590 Biological Sciences Ecology Marine and Estuarine Ecology (incl. Marine Ichthyology) Refereed Article PeerReviewed 2003 ftunivtasecite https://doi.org/10.1017/S002531540300715Xh 2019-12-13T21:06:40Z Antarctic krill, Euphausia superba, normally live in social aggregations (schools) but rarely aggregate in laboratory tanks. In order to study the effect of stress on solitary living we tethered krill to wooden skewers and measured heart rate both when they were held isolated from conspecifics and when they were held at normal schooling distances (1 body length). Heart rate did not differ significantly with sex or body size. However, intermoult krill had a significantly lower heart rate than postmoult animals. When two individuals were held at schooling distance, with one slightly higher in the water column than the other, the heart rate of the higher individual slowed significantly (106-98 beats min-1), while that of the lower individual remained the same. We interpret these results to mean that krill living solitarily are stressed but will respond to neighbouring individuals by decreasing their metabolic rate and saving energy. Article in Journal/Newspaper Antarc* Antarctic Antarctic Krill Euphausia superba eCite UTAS (University of Tasmania) Antarctic Journal of the Marine Biological Association of the United Kingdom 83 2 329 330 |
institution |
Open Polar |
collection |
eCite UTAS (University of Tasmania) |
op_collection_id |
ftunivtasecite |
language |
English |
topic |
Biological Sciences Ecology Marine and Estuarine Ecology (incl. Marine Ichthyology) |
spellingShingle |
Biological Sciences Ecology Marine and Estuarine Ecology (incl. Marine Ichthyology) Ritz, DA Newman, L Swadling, KM Nicol, S Osborn, JE Heart rate as a measure of stress in Antarctic krill, Euphausia superba |
topic_facet |
Biological Sciences Ecology Marine and Estuarine Ecology (incl. Marine Ichthyology) |
description |
Antarctic krill, Euphausia superba, normally live in social aggregations (schools) but rarely aggregate in laboratory tanks. In order to study the effect of stress on solitary living we tethered krill to wooden skewers and measured heart rate both when they were held isolated from conspecifics and when they were held at normal schooling distances (1 body length). Heart rate did not differ significantly with sex or body size. However, intermoult krill had a significantly lower heart rate than postmoult animals. When two individuals were held at schooling distance, with one slightly higher in the water column than the other, the heart rate of the higher individual slowed significantly (106-98 beats min-1), while that of the lower individual remained the same. We interpret these results to mean that krill living solitarily are stressed but will respond to neighbouring individuals by decreasing their metabolic rate and saving energy. |
format |
Article in Journal/Newspaper |
author |
Ritz, DA Newman, L Swadling, KM Nicol, S Osborn, JE |
author_facet |
Ritz, DA Newman, L Swadling, KM Nicol, S Osborn, JE |
author_sort |
Ritz, DA |
title |
Heart rate as a measure of stress in Antarctic krill, Euphausia superba |
title_short |
Heart rate as a measure of stress in Antarctic krill, Euphausia superba |
title_full |
Heart rate as a measure of stress in Antarctic krill, Euphausia superba |
title_fullStr |
Heart rate as a measure of stress in Antarctic krill, Euphausia superba |
title_full_unstemmed |
Heart rate as a measure of stress in Antarctic krill, Euphausia superba |
title_sort |
heart rate as a measure of stress in antarctic krill, euphausia superba |
publisher |
Cambridge University Press |
publishDate |
2003 |
url |
https://doi.org/10.1017/S002531540300715Xh http://ecite.utas.edu.au/25590 |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic Antarctic Krill Euphausia superba |
genre_facet |
Antarc* Antarctic Antarctic Krill Euphausia superba |
op_relation |
http://dx.doi.org/10.1017/S002531540300715Xh Ritz, DA and Newman, L and Swadling, KM and Nicol, S and Osborn, JE, Heart rate as a measure of stress in Antarctic krill, Euphausia superba , Journal of the Marine Biological Association of the United Kingdom, 83, (2) pp. 329-330 . ISSN 0025-3154 (2003) [Refereed Article] http://ecite.utas.edu.au/25590 |
op_doi |
https://doi.org/10.1017/S002531540300715Xh |
container_title |
Journal of the Marine Biological Association of the United Kingdom |
container_volume |
83 |
container_issue |
2 |
container_start_page |
329 |
op_container_end_page |
330 |
_version_ |
1766267525211881472 |