Life cycle plasticity and differential growth and development in marine and lacustrine populations of an Antarctic copepod
We examined life cycle plasticity in two populations of the copepod Paralabidocera antarctica, one of which inhabits the coastal sea ice belt of Antarctica and the other of which has been isolated in a nearby saline lake for several thousand generations. Similarities in the life cycles of the two po...
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American Socieity of Limnology and Oceanography, Inc
2004
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ftunivtasecite:oai:ecite.utas.edu.au:29375 2023-05-15T14:03:54+02:00 Life cycle plasticity and differential growth and development in marine and lacustrine populations of an Antarctic copepod Swadling, KM McKinnon, AD De'ath, G Gibson, JAE 2004 https://doi.org/10.4319/lo.2004.49.3.0644 http://ecite.utas.edu.au/29375 en eng American Socieity of Limnology and Oceanography, Inc http://dx.doi.org/10.4319/lo.2004.49.3.0644 Swadling, KM and McKinnon, AD and De'ath, G and Gibson, JAE, Life cycle plasticity and differential growth and development in marine and lacustrine populations of an Antarctic copepod, Limnology and Oceanography, 49, (3) pp. 644-655. ISSN 0024-3590 (2004) [Refereed Article] http://ecite.utas.edu.au/29375 Biological Sciences Ecology Marine and Estuarine Ecology (incl. Marine Ichthyology) Refereed Article PeerReviewed 2004 ftunivtasecite https://doi.org/10.4319/lo.2004.49.3.0644 2019-12-13T21:09:33Z We examined life cycle plasticity in two populations of the copepod Paralabidocera antarctica, one of which inhabits the coastal sea ice belt of Antarctica and the other of which has been isolated in a nearby saline lake for several thousand generations. Similarities in the life cycles of the two populations included long overwintering phases (>5 months) by late-stage nauplii, rapid development through the copepodid stages, and a short adult life span of 2-3 weeks. Adults appeared in late spring or early summer and spawned and died soon after. However, the life cycle of the lacustrine population was much less tightly regulated than at the marine site; animals were rarely found living within the lake ice, and synchrony in the developmental cycle was diminished. It is likely that a combination of factors, including ice hardness, a lack of predation threat, and a consistent food supply has freed the lacustrine population from the constraints imposed by living within the ice cover. Instantaneous growth rates calculated for the marine site showed a variable growth rate (0.04-0.14 d-1). The lacustrine population in general had faster growth rates than the marine population (0.10-0.26 d -1) and reached maturity at a smaller size. This is attributed, in part, to the higher environmental temperatures experienced by the lacustrine population. Article in Journal/Newspaper Antarc* Antarctic Antarctica Sea ice eCite UTAS (University of Tasmania) Antarctic Freed ENVELOPE(164.333,164.333,-71.483,-71.483) Saline Lake ENVELOPE(-111.528,-111.528,57.081,57.081) Limnology and Oceanography 49 3 644 655 |
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) Swadling, KM McKinnon, AD De'ath, G Gibson, JAE Life cycle plasticity and differential growth and development in marine and lacustrine populations of an Antarctic copepod |
topic_facet |
Biological Sciences Ecology Marine and Estuarine Ecology (incl. Marine Ichthyology) |
description |
We examined life cycle plasticity in two populations of the copepod Paralabidocera antarctica, one of which inhabits the coastal sea ice belt of Antarctica and the other of which has been isolated in a nearby saline lake for several thousand generations. Similarities in the life cycles of the two populations included long overwintering phases (>5 months) by late-stage nauplii, rapid development through the copepodid stages, and a short adult life span of 2-3 weeks. Adults appeared in late spring or early summer and spawned and died soon after. However, the life cycle of the lacustrine population was much less tightly regulated than at the marine site; animals were rarely found living within the lake ice, and synchrony in the developmental cycle was diminished. It is likely that a combination of factors, including ice hardness, a lack of predation threat, and a consistent food supply has freed the lacustrine population from the constraints imposed by living within the ice cover. Instantaneous growth rates calculated for the marine site showed a variable growth rate (0.04-0.14 d-1). The lacustrine population in general had faster growth rates than the marine population (0.10-0.26 d -1) and reached maturity at a smaller size. This is attributed, in part, to the higher environmental temperatures experienced by the lacustrine population. |
format |
Article in Journal/Newspaper |
author |
Swadling, KM McKinnon, AD De'ath, G Gibson, JAE |
author_facet |
Swadling, KM McKinnon, AD De'ath, G Gibson, JAE |
author_sort |
Swadling, KM |
title |
Life cycle plasticity and differential growth and development in marine and lacustrine populations of an Antarctic copepod |
title_short |
Life cycle plasticity and differential growth and development in marine and lacustrine populations of an Antarctic copepod |
title_full |
Life cycle plasticity and differential growth and development in marine and lacustrine populations of an Antarctic copepod |
title_fullStr |
Life cycle plasticity and differential growth and development in marine and lacustrine populations of an Antarctic copepod |
title_full_unstemmed |
Life cycle plasticity and differential growth and development in marine and lacustrine populations of an Antarctic copepod |
title_sort |
life cycle plasticity and differential growth and development in marine and lacustrine populations of an antarctic copepod |
publisher |
American Socieity of Limnology and Oceanography, Inc |
publishDate |
2004 |
url |
https://doi.org/10.4319/lo.2004.49.3.0644 http://ecite.utas.edu.au/29375 |
long_lat |
ENVELOPE(164.333,164.333,-71.483,-71.483) ENVELOPE(-111.528,-111.528,57.081,57.081) |
geographic |
Antarctic Freed Saline Lake |
geographic_facet |
Antarctic Freed Saline Lake |
genre |
Antarc* Antarctic Antarctica Sea ice |
genre_facet |
Antarc* Antarctic Antarctica Sea ice |
op_relation |
http://dx.doi.org/10.4319/lo.2004.49.3.0644 Swadling, KM and McKinnon, AD and De'ath, G and Gibson, JAE, Life cycle plasticity and differential growth and development in marine and lacustrine populations of an Antarctic copepod, Limnology and Oceanography, 49, (3) pp. 644-655. ISSN 0024-3590 (2004) [Refereed Article] http://ecite.utas.edu.au/29375 |
op_doi |
https://doi.org/10.4319/lo.2004.49.3.0644 |
container_title |
Limnology and Oceanography |
container_volume |
49 |
container_issue |
3 |
container_start_page |
644 |
op_container_end_page |
655 |
_version_ |
1766274773524938752 |