Overwintering strategies in calanus finmarchicus
The marine copepod Calanus finmarchicus is known to overwinter at depth in a state analogous to diapause in terrestrial insects, but the cues which cause individuals to enter and leave this state are the subject of speculation. In this paper we use a simple demographic model, driven by environmental...
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ftustrathclyde:oai:strathprints.strath.ac.uk:17499 2024-04-28T08:15:04+00:00 Overwintering strategies in calanus finmarchicus Hind, A.T. Gurney, W.S.C. Heath, M. Bryant, A.D. 2000-02-28 application/pdf https://strathprints.strath.ac.uk/17499/ https://strathprints.strath.ac.uk/17499/1/strathprint17499.pdf unknown https://strathprints.strath.ac.uk/17499/1/strathprint17499.pdf Hind, A.T. and Gurney, W.S.C. <https://strathprints.strath.ac.uk/view/author/21342.html> and Heath, M. <https://strathprints.strath.ac.uk/view/author/430104.html> and Bryant, A.D. (2000 <https://strathprints.strath.ac.uk/view/year/2000.html>) Overwintering strategies in calanus finmarchicus. Marine Ecology Progress Series <https://strathprints.strath.ac.uk/view/publications/Marine_Ecology_Progress_Series.html>, 193. pp. 95-107. ISSN 0171-8630 Aquaculture. Fisheries. Angling Statistics Article PeerReviewed 2000 ftustrathclyde 2024-04-10T00:38:17Z The marine copepod Calanus finmarchicus is known to overwinter at depth in a state analogous to diapause in terrestrial insects, but the cues which cause individuals to enter and leave this state are the subject of speculation. In this paper we use a simple demographic model, driven by environmental data from 4 distinct locations in the organism's eastern range, to test the plausibility of a number of candidate mechanisms. We start from Miller et al.'s (1991; Mar Ecol Prog Ser 72:79-91) hypothesis that diapause is controlled by photoperiod, and show that thls leads to unrealistic patterns of reproductive activity in northern waters. We extend the model to include the recently reported phenomenon (Hirche 1996a; Ophelia 44:lll-128) of delayed gonad maturation in females experiencing low food concentrations. This ylelds more plausible annual patterns, but falls to reproduce observed geographical variation in the timing of the yearly onset of reproductive activity. Our final model dispenses with photoperiodic control and assumes that diapause duration is controlled by the normal development processes operating at a reduced rate. This model reproduces all the qualitative features of the patterns of reproductive activity observed at our 4 test sites, thus demonstrating that photoperiod cueing is not a necessary prerequisite for the regular re-ascension of C. finmarchicus into surface waters Article in Journal/Newspaper Calanus finmarchicus University of Strathclyde Glasgow: Strathprints |
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Open Polar |
collection |
University of Strathclyde Glasgow: Strathprints |
op_collection_id |
ftustrathclyde |
language |
unknown |
topic |
Aquaculture. Fisheries. Angling Statistics |
spellingShingle |
Aquaculture. Fisheries. Angling Statistics Hind, A.T. Gurney, W.S.C. Heath, M. Bryant, A.D. Overwintering strategies in calanus finmarchicus |
topic_facet |
Aquaculture. Fisheries. Angling Statistics |
description |
The marine copepod Calanus finmarchicus is known to overwinter at depth in a state analogous to diapause in terrestrial insects, but the cues which cause individuals to enter and leave this state are the subject of speculation. In this paper we use a simple demographic model, driven by environmental data from 4 distinct locations in the organism's eastern range, to test the plausibility of a number of candidate mechanisms. We start from Miller et al.'s (1991; Mar Ecol Prog Ser 72:79-91) hypothesis that diapause is controlled by photoperiod, and show that thls leads to unrealistic patterns of reproductive activity in northern waters. We extend the model to include the recently reported phenomenon (Hirche 1996a; Ophelia 44:lll-128) of delayed gonad maturation in females experiencing low food concentrations. This ylelds more plausible annual patterns, but falls to reproduce observed geographical variation in the timing of the yearly onset of reproductive activity. Our final model dispenses with photoperiodic control and assumes that diapause duration is controlled by the normal development processes operating at a reduced rate. This model reproduces all the qualitative features of the patterns of reproductive activity observed at our 4 test sites, thus demonstrating that photoperiod cueing is not a necessary prerequisite for the regular re-ascension of C. finmarchicus into surface waters |
format |
Article in Journal/Newspaper |
author |
Hind, A.T. Gurney, W.S.C. Heath, M. Bryant, A.D. |
author_facet |
Hind, A.T. Gurney, W.S.C. Heath, M. Bryant, A.D. |
author_sort |
Hind, A.T. |
title |
Overwintering strategies in calanus finmarchicus |
title_short |
Overwintering strategies in calanus finmarchicus |
title_full |
Overwintering strategies in calanus finmarchicus |
title_fullStr |
Overwintering strategies in calanus finmarchicus |
title_full_unstemmed |
Overwintering strategies in calanus finmarchicus |
title_sort |
overwintering strategies in calanus finmarchicus |
publishDate |
2000 |
url |
https://strathprints.strath.ac.uk/17499/ https://strathprints.strath.ac.uk/17499/1/strathprint17499.pdf |
genre |
Calanus finmarchicus |
genre_facet |
Calanus finmarchicus |
op_relation |
https://strathprints.strath.ac.uk/17499/1/strathprint17499.pdf Hind, A.T. and Gurney, W.S.C. <https://strathprints.strath.ac.uk/view/author/21342.html> and Heath, M. <https://strathprints.strath.ac.uk/view/author/430104.html> and Bryant, A.D. (2000 <https://strathprints.strath.ac.uk/view/year/2000.html>) Overwintering strategies in calanus finmarchicus. Marine Ecology Progress Series <https://strathprints.strath.ac.uk/view/publications/Marine_Ecology_Progress_Series.html>, 193. pp. 95-107. ISSN 0171-8630 |
_version_ |
1797580848877273088 |