The life history of the diving beetle, Lancetes angusticollis (Curtis) (Coleoptera: Dytiscidae), on sub-Antarctic South Georgia
Two populations of the world's most southerly diving beetle (Lancetes angusticollis) were studied on sub-Antarctic South Georgia between November 1995 and April 1996. Parallel observations were made on laboratory cultures of each life stage. All juvenile stages of L. angusticollis are voracious...
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SPRINGER VERLAG
1998
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ftnerc:oai:nora.nerc.ac.uk:10184 2023-05-15T13:45:10+02:00 The life history of the diving beetle, Lancetes angusticollis (Curtis) (Coleoptera: Dytiscidae), on sub-Antarctic South Georgia Arnold, R.J. Convey, P. 1998 http://nora.nerc.ac.uk/id/eprint/10184/ unknown SPRINGER VERLAG Arnold, R.J.; Convey, P. orcid:0000-0001-8497-9903 . 1998 The life history of the diving beetle, Lancetes angusticollis (Curtis) (Coleoptera: Dytiscidae), on sub-Antarctic South Georgia. Polar Biology, 20 (3). 153-160. https://doi.org/10.1007/s003000050291 <https://doi.org/10.1007/s003000050291> Biology and Microbiology Zoology Ecology and Environment Publication - Article PeerReviewed 1998 ftnerc https://doi.org/10.1007/s003000050291 2023-02-04T19:26:32Z Two populations of the world's most southerly diving beetle (Lancetes angusticollis) were studied on sub-Antarctic South Georgia between November 1995 and April 1996. Parallel observations were made on laboratory cultures of each life stage. All juvenile stages of L. angusticollis are voracious predators, preying mainly on the herbivorous copepod Boeckella poppei. Adult beetles additionally predate benthic ostracods. Laboratory predation rates and held population densities found in this study suggest that L. angusticollis has a more significant impact on its prey than recognised in recent studies of South Georgian lakes. Spring field samples contained only a few individuals of larval instar IV and adults. Young larvae were present from December onwards, with a rapid progression through juvenile instars during the summer months. Fourth instar larvae left the water for pupation between mid-December and at least mid-February. Combining these observations with known developmental threshold temperatures for each life stage implies that L. angusticollis has a complex biennial (minimum) life-cycle, with overwintering possible in three life stages [aquatic larvae, terrestrial pupae (not proven) and aquatic adults]. L. angusticollis may be a suitable indicator species in the context of climate warming studies: a small (1 degrees C) rise in mean environmental temperatures, comparable to that already observed at several sub-Antarctic and maritime Antarctic localities, would allow completion of an annual (univoltine) life-cycle, with concomitant rapid population increase, and serious implications for trophic interactions in these simple lake ecosystems. Article in Journal/Newspaper Antarc* Antarctic Polar Biology Natural Environment Research Council: NERC Open Research Archive Antarctic Boeckella ENVELOPE(-56.999,-56.999,-63.404,-63.404) Polar Biology 20 3 153 160 |
institution |
Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
unknown |
topic |
Biology and Microbiology Zoology Ecology and Environment |
spellingShingle |
Biology and Microbiology Zoology Ecology and Environment Arnold, R.J. Convey, P. The life history of the diving beetle, Lancetes angusticollis (Curtis) (Coleoptera: Dytiscidae), on sub-Antarctic South Georgia |
topic_facet |
Biology and Microbiology Zoology Ecology and Environment |
description |
Two populations of the world's most southerly diving beetle (Lancetes angusticollis) were studied on sub-Antarctic South Georgia between November 1995 and April 1996. Parallel observations were made on laboratory cultures of each life stage. All juvenile stages of L. angusticollis are voracious predators, preying mainly on the herbivorous copepod Boeckella poppei. Adult beetles additionally predate benthic ostracods. Laboratory predation rates and held population densities found in this study suggest that L. angusticollis has a more significant impact on its prey than recognised in recent studies of South Georgian lakes. Spring field samples contained only a few individuals of larval instar IV and adults. Young larvae were present from December onwards, with a rapid progression through juvenile instars during the summer months. Fourth instar larvae left the water for pupation between mid-December and at least mid-February. Combining these observations with known developmental threshold temperatures for each life stage implies that L. angusticollis has a complex biennial (minimum) life-cycle, with overwintering possible in three life stages [aquatic larvae, terrestrial pupae (not proven) and aquatic adults]. L. angusticollis may be a suitable indicator species in the context of climate warming studies: a small (1 degrees C) rise in mean environmental temperatures, comparable to that already observed at several sub-Antarctic and maritime Antarctic localities, would allow completion of an annual (univoltine) life-cycle, with concomitant rapid population increase, and serious implications for trophic interactions in these simple lake ecosystems. |
format |
Article in Journal/Newspaper |
author |
Arnold, R.J. Convey, P. |
author_facet |
Arnold, R.J. Convey, P. |
author_sort |
Arnold, R.J. |
title |
The life history of the diving beetle, Lancetes angusticollis (Curtis) (Coleoptera: Dytiscidae), on sub-Antarctic South Georgia |
title_short |
The life history of the diving beetle, Lancetes angusticollis (Curtis) (Coleoptera: Dytiscidae), on sub-Antarctic South Georgia |
title_full |
The life history of the diving beetle, Lancetes angusticollis (Curtis) (Coleoptera: Dytiscidae), on sub-Antarctic South Georgia |
title_fullStr |
The life history of the diving beetle, Lancetes angusticollis (Curtis) (Coleoptera: Dytiscidae), on sub-Antarctic South Georgia |
title_full_unstemmed |
The life history of the diving beetle, Lancetes angusticollis (Curtis) (Coleoptera: Dytiscidae), on sub-Antarctic South Georgia |
title_sort |
life history of the diving beetle, lancetes angusticollis (curtis) (coleoptera: dytiscidae), on sub-antarctic south georgia |
publisher |
SPRINGER VERLAG |
publishDate |
1998 |
url |
http://nora.nerc.ac.uk/id/eprint/10184/ |
long_lat |
ENVELOPE(-56.999,-56.999,-63.404,-63.404) |
geographic |
Antarctic Boeckella |
geographic_facet |
Antarctic Boeckella |
genre |
Antarc* Antarctic Polar Biology |
genre_facet |
Antarc* Antarctic Polar Biology |
op_relation |
Arnold, R.J.; Convey, P. orcid:0000-0001-8497-9903 . 1998 The life history of the diving beetle, Lancetes angusticollis (Curtis) (Coleoptera: Dytiscidae), on sub-Antarctic South Georgia. Polar Biology, 20 (3). 153-160. https://doi.org/10.1007/s003000050291 <https://doi.org/10.1007/s003000050291> |
op_doi |
https://doi.org/10.1007/s003000050291 |
container_title |
Polar Biology |
container_volume |
20 |
container_issue |
3 |
container_start_page |
153 |
op_container_end_page |
160 |
_version_ |
1766214028686786560 |