On the timing of moulting processes in reproductively active Northern krill, Meganyctiphanes norvegica
The interactions between moult phasing, growth and environmental cues in Northern krill (Meganyctiphanes norvegica) were examined through analysing populations at seasonal, weekly and daily timescales. The analyses were carried out on resident populations of krill found in 3 different neritic locati...
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Online Access: | https://epic.awi.de/id/eprint/14498/ https://epic.awi.de/id/eprint/14498/1/Buc2006b.pdf https://doi.org/10.1007/s00227-006-0317-1 https://hdl.handle.net/10013/epic.24795 https://hdl.handle.net/10013/epic.24795.d001 |
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ftawi:oai:epic.awi.de:14498 2024-09-15T18:18:24+00:00 On the timing of moulting processes in reproductively active Northern krill, Meganyctiphanes norvegica Buchholz, Cornelia Buchholz, Friedrich Tarling, G. A. 2006 application/pdf https://epic.awi.de/id/eprint/14498/ https://epic.awi.de/id/eprint/14498/1/Buc2006b.pdf https://doi.org/10.1007/s00227-006-0317-1 https://hdl.handle.net/10013/epic.24795 https://hdl.handle.net/10013/epic.24795.d001 unknown https://epic.awi.de/id/eprint/14498/1/Buc2006b.pdf https://hdl.handle.net/10013/epic.24795.d001 Buchholz, C. orcid:0000-0002-5055-1586 , Buchholz, F. and Tarling, G. A. (2006) On the timing of moulting processes in reproductively active Northern krill, Meganyctiphanes norvegica , Marine Biology, 149 (6), pp. 1443-1452 . doi:10.1007/s00227-006-0317-1 <https://doi.org/10.1007/s00227-006-0317-1> , hdl:10013/epic.24795 EPIC3Marine Biology, 149(6), pp. 1443-1452 Article isiRev 2006 ftawi https://doi.org/10.1007/s00227-006-0317-1 2024-06-24T03:58:50Z The interactions between moult phasing, growth and environmental cues in Northern krill (Meganyctiphanes norvegica) were examined through analysing populations at seasonal, weekly and daily timescales. The analyses were carried out on resident populations of krill found in 3 different neritic locations that experience similar environmental signals (the Clyde Sea, Scotland; the Kattegat, Denmark; Gullmarsfjord, Sweden). Seasonal analyses were carried out on the Clyde Sea population and showed that moulting frequency increased significantly moving from winter to summer. The proportion of moulting females in summer samples was often more than double the proportion of moulting males, suggesting that females had a comparatively shorter intermoult period. Weekly samples taken from the Kattegat showed a similar pattern. However, although the difference between the proportion of female and male moulters was significant in one week, it was not in another, mainly because of the variability in the proportion of female moulters. Such variability in females was equally evident in the daily samples taken at Gullmarsfjord. It suggests that females have a shorter intermoult period (12.5 d) than males (18.4 d) and also are more likely to moult in synchrony. Nevertheless, the daily samples revealed that males are also capable of moult synchronisation, although less frequently than females. Shortened intermoult periods in females were not a result of the abbreviation of the specific moult stages. Accordingly, reproductive activity did not alter the course of the normal moult cycle. There was no significant difference between the total body lengths of males and females indicating that females achieve the same levels of growth despite moulting more frequently and having to provision the energy-rich ovaries. This is in contrast to most other crustaceans where the energy costs of reproduction reduce female growth. The fact that females were less abundant than males, probably by suffering a greater level of mortality, suggests that ... Article in Journal/Newspaper Meganyctiphanes norvegica Northern krill Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Marine Biology 149 6 1443 1452 |
institution |
Open Polar |
collection |
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
op_collection_id |
ftawi |
language |
unknown |
description |
The interactions between moult phasing, growth and environmental cues in Northern krill (Meganyctiphanes norvegica) were examined through analysing populations at seasonal, weekly and daily timescales. The analyses were carried out on resident populations of krill found in 3 different neritic locations that experience similar environmental signals (the Clyde Sea, Scotland; the Kattegat, Denmark; Gullmarsfjord, Sweden). Seasonal analyses were carried out on the Clyde Sea population and showed that moulting frequency increased significantly moving from winter to summer. The proportion of moulting females in summer samples was often more than double the proportion of moulting males, suggesting that females had a comparatively shorter intermoult period. Weekly samples taken from the Kattegat showed a similar pattern. However, although the difference between the proportion of female and male moulters was significant in one week, it was not in another, mainly because of the variability in the proportion of female moulters. Such variability in females was equally evident in the daily samples taken at Gullmarsfjord. It suggests that females have a shorter intermoult period (12.5 d) than males (18.4 d) and also are more likely to moult in synchrony. Nevertheless, the daily samples revealed that males are also capable of moult synchronisation, although less frequently than females. Shortened intermoult periods in females were not a result of the abbreviation of the specific moult stages. Accordingly, reproductive activity did not alter the course of the normal moult cycle. There was no significant difference between the total body lengths of males and females indicating that females achieve the same levels of growth despite moulting more frequently and having to provision the energy-rich ovaries. This is in contrast to most other crustaceans where the energy costs of reproduction reduce female growth. The fact that females were less abundant than males, probably by suffering a greater level of mortality, suggests that ... |
format |
Article in Journal/Newspaper |
author |
Buchholz, Cornelia Buchholz, Friedrich Tarling, G. A. |
spellingShingle |
Buchholz, Cornelia Buchholz, Friedrich Tarling, G. A. On the timing of moulting processes in reproductively active Northern krill, Meganyctiphanes norvegica |
author_facet |
Buchholz, Cornelia Buchholz, Friedrich Tarling, G. A. |
author_sort |
Buchholz, Cornelia |
title |
On the timing of moulting processes in reproductively active Northern krill, Meganyctiphanes norvegica |
title_short |
On the timing of moulting processes in reproductively active Northern krill, Meganyctiphanes norvegica |
title_full |
On the timing of moulting processes in reproductively active Northern krill, Meganyctiphanes norvegica |
title_fullStr |
On the timing of moulting processes in reproductively active Northern krill, Meganyctiphanes norvegica |
title_full_unstemmed |
On the timing of moulting processes in reproductively active Northern krill, Meganyctiphanes norvegica |
title_sort |
on the timing of moulting processes in reproductively active northern krill, meganyctiphanes norvegica |
publishDate |
2006 |
url |
https://epic.awi.de/id/eprint/14498/ https://epic.awi.de/id/eprint/14498/1/Buc2006b.pdf https://doi.org/10.1007/s00227-006-0317-1 https://hdl.handle.net/10013/epic.24795 https://hdl.handle.net/10013/epic.24795.d001 |
genre |
Meganyctiphanes norvegica Northern krill |
genre_facet |
Meganyctiphanes norvegica Northern krill |
op_source |
EPIC3Marine Biology, 149(6), pp. 1443-1452 |
op_relation |
https://epic.awi.de/id/eprint/14498/1/Buc2006b.pdf https://hdl.handle.net/10013/epic.24795.d001 Buchholz, C. orcid:0000-0002-5055-1586 , Buchholz, F. and Tarling, G. A. (2006) On the timing of moulting processes in reproductively active Northern krill, Meganyctiphanes norvegica , Marine Biology, 149 (6), pp. 1443-1452 . doi:10.1007/s00227-006-0317-1 <https://doi.org/10.1007/s00227-006-0317-1> , hdl:10013/epic.24795 |
op_doi |
https://doi.org/10.1007/s00227-006-0317-1 |
container_title |
Marine Biology |
container_volume |
149 |
container_issue |
6 |
container_start_page |
1443 |
op_container_end_page |
1452 |
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1810456530683691008 |