Geographic intraspecific variation in buoyancy within Antarctic notothenioid fishes
Abstract We investigated intraspecific geographic variation in buoyancy by obtaining percentage buoyancy (%B) measurements for the Antarctic notothenioid species Pleuragramma antarcticum , Trematomus hansoni , T. bernacchii and Gymnodraco acuticeps from both McMurdo Sound in East Antarctica and the...
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Cambridge University Press (CUP)
2008
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Online Access: | http://dx.doi.org/10.1017/s0954102008001661 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102008001661 |
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crcambridgeupr:10.1017/s0954102008001661 2024-03-03T08:38:28+00:00 Geographic intraspecific variation in buoyancy within Antarctic notothenioid fishes Near, Thomas J. Jones, Christopher D. Eastman, Joseph T. 2008 http://dx.doi.org/10.1017/s0954102008001661 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102008001661 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Antarctic Science volume 21, issue 2, page 123-129 ISSN 0954-1020 1365-2079 Geology Ecology, Evolution, Behavior and Systematics Oceanography journal-article 2008 crcambridgeupr https://doi.org/10.1017/s0954102008001661 2024-02-08T08:37:25Z Abstract We investigated intraspecific geographic variation in buoyancy by obtaining percentage buoyancy (%B) measurements for the Antarctic notothenioid species Pleuragramma antarcticum , Trematomus hansoni , T. bernacchii and Gymnodraco acuticeps from both McMurdo Sound in East Antarctica and the South Shetland Islands in West Antarctica. Mean percentage buoyancies in these species ranged from 0.22–0.52% in the neutrally buoyant P. antarcticum to 3.34–3.67% in the benthic T. bernacchii . Dispersion (1 standard deviation) of percentage buoyancy (%B) values around the mean was ± 0.2–0.5 %B units for the entire sample. Although intraspecific differences in mean percentage buoyancy were statistically significant ( P < 0.05) in P. antarcticum and T. hansoni , we consider these differences as normal variation without substantive biological significance. The dispersion in buoyancy measurements during adult life reflects the density of the fish and this may be influenced, in both the short- and long-term, by gut contents, nutritional condition, and reproductive state. Mitigation of the effects of these variables is not biologically realistic because they constitute normal aspects of the daily and yearly life cycles. The results of our measurements of buoyancy are consistent with what is known about the ecology of these four species and this is considered in the discussion. Article in Journal/Newspaper Antarc* Antarctic Antarctic Science Antarctica East Antarctica McMurdo Sound South Shetland Islands West Antarctica Cambridge University Press Antarctic The Antarctic East Antarctica West Antarctica South Shetland Islands McMurdo Sound Antarctic Science 21 2 123 129 |
institution |
Open Polar |
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Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
topic |
Geology Ecology, Evolution, Behavior and Systematics Oceanography |
spellingShingle |
Geology Ecology, Evolution, Behavior and Systematics Oceanography Near, Thomas J. Jones, Christopher D. Eastman, Joseph T. Geographic intraspecific variation in buoyancy within Antarctic notothenioid fishes |
topic_facet |
Geology Ecology, Evolution, Behavior and Systematics Oceanography |
description |
Abstract We investigated intraspecific geographic variation in buoyancy by obtaining percentage buoyancy (%B) measurements for the Antarctic notothenioid species Pleuragramma antarcticum , Trematomus hansoni , T. bernacchii and Gymnodraco acuticeps from both McMurdo Sound in East Antarctica and the South Shetland Islands in West Antarctica. Mean percentage buoyancies in these species ranged from 0.22–0.52% in the neutrally buoyant P. antarcticum to 3.34–3.67% in the benthic T. bernacchii . Dispersion (1 standard deviation) of percentage buoyancy (%B) values around the mean was ± 0.2–0.5 %B units for the entire sample. Although intraspecific differences in mean percentage buoyancy were statistically significant ( P < 0.05) in P. antarcticum and T. hansoni , we consider these differences as normal variation without substantive biological significance. The dispersion in buoyancy measurements during adult life reflects the density of the fish and this may be influenced, in both the short- and long-term, by gut contents, nutritional condition, and reproductive state. Mitigation of the effects of these variables is not biologically realistic because they constitute normal aspects of the daily and yearly life cycles. The results of our measurements of buoyancy are consistent with what is known about the ecology of these four species and this is considered in the discussion. |
format |
Article in Journal/Newspaper |
author |
Near, Thomas J. Jones, Christopher D. Eastman, Joseph T. |
author_facet |
Near, Thomas J. Jones, Christopher D. Eastman, Joseph T. |
author_sort |
Near, Thomas J. |
title |
Geographic intraspecific variation in buoyancy within Antarctic notothenioid fishes |
title_short |
Geographic intraspecific variation in buoyancy within Antarctic notothenioid fishes |
title_full |
Geographic intraspecific variation in buoyancy within Antarctic notothenioid fishes |
title_fullStr |
Geographic intraspecific variation in buoyancy within Antarctic notothenioid fishes |
title_full_unstemmed |
Geographic intraspecific variation in buoyancy within Antarctic notothenioid fishes |
title_sort |
geographic intraspecific variation in buoyancy within antarctic notothenioid fishes |
publisher |
Cambridge University Press (CUP) |
publishDate |
2008 |
url |
http://dx.doi.org/10.1017/s0954102008001661 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102008001661 |
geographic |
Antarctic The Antarctic East Antarctica West Antarctica South Shetland Islands McMurdo Sound |
geographic_facet |
Antarctic The Antarctic East Antarctica West Antarctica South Shetland Islands McMurdo Sound |
genre |
Antarc* Antarctic Antarctic Science Antarctica East Antarctica McMurdo Sound South Shetland Islands West Antarctica |
genre_facet |
Antarc* Antarctic Antarctic Science Antarctica East Antarctica McMurdo Sound South Shetland Islands West Antarctica |
op_source |
Antarctic Science volume 21, issue 2, page 123-129 ISSN 0954-1020 1365-2079 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1017/s0954102008001661 |
container_title |
Antarctic Science |
container_volume |
21 |
container_issue |
2 |
container_start_page |
123 |
op_container_end_page |
129 |
_version_ |
1792506862209335296 |