Effect of starvation on the reproductive potential of Calanus finmarchicus
The effect of starvation on gonad morphology and egg production of Calanus finmarchicus was studied during the winter spring transition in a North Norwegian fjord. Single females were exposed either to surplus food or to filtered seawater for 4–9 d in short-term experiments and for 3 weeks in long-t...
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Oxford University Press
2000
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fthighwire:oai:open-archive.highwire.org:icesjms:57/6/1764 2023-05-15T15:47:56+02:00 Effect of starvation on the reproductive potential of Calanus finmarchicus Niehoff, B. 2000-12-01 00:00:00.0 text/html http://icesjms.oxfordjournals.org/cgi/content/short/57/6/1764 https://doi.org/10.1006/jmsc.2000.0971 en eng Oxford University Press http://icesjms.oxfordjournals.org/cgi/content/short/57/6/1764 http://dx.doi.org/10.1006/jmsc.2000.0971 Copyright (C) 2000, International Council for the Exploration of the Sea/Conseil International pour l'Exploration de la Mer Articles TEXT 2000 fthighwire https://doi.org/10.1006/jmsc.2000.0971 2013-05-27T04:57:18Z The effect of starvation on gonad morphology and egg production of Calanus finmarchicus was studied during the winter spring transition in a North Norwegian fjord. Single females were exposed either to surplus food or to filtered seawater for 4–9 d in short-term experiments and for 3 weeks in long-term experiments. Additional laboratory experiments were performed with female C. finmarchicus from the Norwegian Sea, studying the resumption of egg production after short (1–3 d) or long (15 d) intervals of starvation. In fed females, gonads were mature and rates of egg production were relatively high. During starvation, gonads remained immature or returned to an immature stage; no eggs were produced. Histological analysis of starving females showed that oocytes in the diverticula disintegrated, while cells in the ovary were intact. After two weeks of starvation, reproductive activity resumed within a week of surplus feeding. However, egg production remained significantly lower than in females fed continuously. When female C. finmarchicus were exposed to short starvation intervals, reproduction decreased significantly owing to both higher percentages of non-spawning females and decreasing clutch sizes. The experiments have shown that starvation periods have a strong influence on reproduction of C. finmarchicus , which was dependent on the duration of starvation and the timing within the maturation cycle. Lifetime fecundity is probably considerably reduced, obviously during starvation but also as a result of long-term effects. Text Calanus finmarchicus Norwegian Sea HighWire Press (Stanford University) Norwegian Sea ICES Journal of Marine Science 57 6 1764 1772 |
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HighWire Press (Stanford University) |
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English |
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Articles Niehoff, B. Effect of starvation on the reproductive potential of Calanus finmarchicus |
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description |
The effect of starvation on gonad morphology and egg production of Calanus finmarchicus was studied during the winter spring transition in a North Norwegian fjord. Single females were exposed either to surplus food or to filtered seawater for 4–9 d in short-term experiments and for 3 weeks in long-term experiments. Additional laboratory experiments were performed with female C. finmarchicus from the Norwegian Sea, studying the resumption of egg production after short (1–3 d) or long (15 d) intervals of starvation. In fed females, gonads were mature and rates of egg production were relatively high. During starvation, gonads remained immature or returned to an immature stage; no eggs were produced. Histological analysis of starving females showed that oocytes in the diverticula disintegrated, while cells in the ovary were intact. After two weeks of starvation, reproductive activity resumed within a week of surplus feeding. However, egg production remained significantly lower than in females fed continuously. When female C. finmarchicus were exposed to short starvation intervals, reproduction decreased significantly owing to both higher percentages of non-spawning females and decreasing clutch sizes. The experiments have shown that starvation periods have a strong influence on reproduction of C. finmarchicus , which was dependent on the duration of starvation and the timing within the maturation cycle. Lifetime fecundity is probably considerably reduced, obviously during starvation but also as a result of long-term effects. |
format |
Text |
author |
Niehoff, B. |
author_facet |
Niehoff, B. |
author_sort |
Niehoff, B. |
title |
Effect of starvation on the reproductive potential of Calanus finmarchicus |
title_short |
Effect of starvation on the reproductive potential of Calanus finmarchicus |
title_full |
Effect of starvation on the reproductive potential of Calanus finmarchicus |
title_fullStr |
Effect of starvation on the reproductive potential of Calanus finmarchicus |
title_full_unstemmed |
Effect of starvation on the reproductive potential of Calanus finmarchicus |
title_sort |
effect of starvation on the reproductive potential of calanus finmarchicus |
publisher |
Oxford University Press |
publishDate |
2000 |
url |
http://icesjms.oxfordjournals.org/cgi/content/short/57/6/1764 https://doi.org/10.1006/jmsc.2000.0971 |
geographic |
Norwegian Sea |
geographic_facet |
Norwegian Sea |
genre |
Calanus finmarchicus Norwegian Sea |
genre_facet |
Calanus finmarchicus Norwegian Sea |
op_relation |
http://icesjms.oxfordjournals.org/cgi/content/short/57/6/1764 http://dx.doi.org/10.1006/jmsc.2000.0971 |
op_rights |
Copyright (C) 2000, International Council for the Exploration of the Sea/Conseil International pour l'Exploration de la Mer |
op_doi |
https://doi.org/10.1006/jmsc.2000.0971 |
container_title |
ICES Journal of Marine Science |
container_volume |
57 |
container_issue |
6 |
container_start_page |
1764 |
op_container_end_page |
1772 |
_version_ |
1766382905575079936 |