Moult in relation to some aspects of reproduction and growth in swarms of Antarctic krill,Euphausia superba
In a 14-d period 38 swarms of Antarctic krill,Euphausia superba Dana, were sampled in an area 55.5 x 55.5 km to the southwest of Elephant Island, at the north of the South Shetland Islands. Moult stage, maturity stage, and size of ca. 100 krill from each swarm were measured. Each of the characterist...
Published in: | Marine Biology |
---|---|
Main Authors: | , , , , |
Format: | Article in Journal/Newspaper |
Language: | unknown |
Published: |
Springer
1996
|
Subjects: | |
Online Access: | http://nora.nerc.ac.uk/id/eprint/514938/ https://doi.org/10.1007/BF00942104 |
id |
ftnerc:oai:nora.nerc.ac.uk:514938 |
---|---|
record_format |
openpolar |
spelling |
ftnerc:oai:nora.nerc.ac.uk:514938 2023-05-15T13:49:33+02:00 Moult in relation to some aspects of reproduction and growth in swarms of Antarctic krill,Euphausia superba Buchholz, F. Watkins, J.L. Priddle, J. Morris, D.J. Ricketts, C. 1996-12 http://nora.nerc.ac.uk/id/eprint/514938/ https://doi.org/10.1007/BF00942104 unknown Springer Buchholz, F.; Watkins, J.L.; Priddle, J.; Morris, D.J.; Ricketts, C. 1996 Moult in relation to some aspects of reproduction and growth in swarms of Antarctic krill,Euphausia superba. Marine Biology, 127 (2). 201-208. https://doi.org/10.1007/BF00942104 <https://doi.org/10.1007/BF00942104> Publication - Article PeerReviewed 1996 ftnerc https://doi.org/10.1007/BF00942104 2023-02-04T19:43:48Z In a 14-d period 38 swarms of Antarctic krill,Euphausia superba Dana, were sampled in an area 55.5 x 55.5 km to the southwest of Elephant Island, at the north of the South Shetland Islands. Moult stage, maturity stage, and size of ca. 100 krill from each swarm were measured. Each of the characteristics varied greatly between swarms. Moulting krill were found in most swarms, but in one swarm all of the krill were just about to moult. Ways in which moulting may act as a possible sorting mechanism are discussed. Data for all the analysed krill (ca. 3000 specimens) were used to investigate the interdependence of moult rate, sexual maturation and growth. While all immature krill moulted at approximately the saine rate in the study, there were significant differences in the moulting rates of mature male and female krill. Gravid female krill continued to moult, although less frequently than mature males. As a consequence males had to attach spermatophores to females after each moult. It is likely that variation in moult rate of females and males was related to the energy expenditure required for ovary development in females and spermatophore production and searching behaviour in males. Spawning and moulting were only partly coupled in gravid females. Spawning appeared to take place predominantly during Moult Stage D2. There was no evidence of intermoult growth by intersegmental dilation. Article in Journal/Newspaper Antarc* Antarctic Antarctic Krill Elephant Island Euphausia superba South Shetland Islands Natural Environment Research Council: NERC Open Research Archive Antarctic South Shetland Islands Elephant Island ENVELOPE(-55.184,-55.184,-61.085,-61.085) Marine Biology 127 2 201 208 |
institution |
Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
unknown |
description |
In a 14-d period 38 swarms of Antarctic krill,Euphausia superba Dana, were sampled in an area 55.5 x 55.5 km to the southwest of Elephant Island, at the north of the South Shetland Islands. Moult stage, maturity stage, and size of ca. 100 krill from each swarm were measured. Each of the characteristics varied greatly between swarms. Moulting krill were found in most swarms, but in one swarm all of the krill were just about to moult. Ways in which moulting may act as a possible sorting mechanism are discussed. Data for all the analysed krill (ca. 3000 specimens) were used to investigate the interdependence of moult rate, sexual maturation and growth. While all immature krill moulted at approximately the saine rate in the study, there were significant differences in the moulting rates of mature male and female krill. Gravid female krill continued to moult, although less frequently than mature males. As a consequence males had to attach spermatophores to females after each moult. It is likely that variation in moult rate of females and males was related to the energy expenditure required for ovary development in females and spermatophore production and searching behaviour in males. Spawning and moulting were only partly coupled in gravid females. Spawning appeared to take place predominantly during Moult Stage D2. There was no evidence of intermoult growth by intersegmental dilation. |
format |
Article in Journal/Newspaper |
author |
Buchholz, F. Watkins, J.L. Priddle, J. Morris, D.J. Ricketts, C. |
spellingShingle |
Buchholz, F. Watkins, J.L. Priddle, J. Morris, D.J. Ricketts, C. Moult in relation to some aspects of reproduction and growth in swarms of Antarctic krill,Euphausia superba |
author_facet |
Buchholz, F. Watkins, J.L. Priddle, J. Morris, D.J. Ricketts, C. |
author_sort |
Buchholz, F. |
title |
Moult in relation to some aspects of reproduction and growth in swarms of Antarctic krill,Euphausia superba |
title_short |
Moult in relation to some aspects of reproduction and growth in swarms of Antarctic krill,Euphausia superba |
title_full |
Moult in relation to some aspects of reproduction and growth in swarms of Antarctic krill,Euphausia superba |
title_fullStr |
Moult in relation to some aspects of reproduction and growth in swarms of Antarctic krill,Euphausia superba |
title_full_unstemmed |
Moult in relation to some aspects of reproduction and growth in swarms of Antarctic krill,Euphausia superba |
title_sort |
moult in relation to some aspects of reproduction and growth in swarms of antarctic krill,euphausia superba |
publisher |
Springer |
publishDate |
1996 |
url |
http://nora.nerc.ac.uk/id/eprint/514938/ https://doi.org/10.1007/BF00942104 |
long_lat |
ENVELOPE(-55.184,-55.184,-61.085,-61.085) |
geographic |
Antarctic South Shetland Islands Elephant Island |
geographic_facet |
Antarctic South Shetland Islands Elephant Island |
genre |
Antarc* Antarctic Antarctic Krill Elephant Island Euphausia superba South Shetland Islands |
genre_facet |
Antarc* Antarctic Antarctic Krill Elephant Island Euphausia superba South Shetland Islands |
op_relation |
Buchholz, F.; Watkins, J.L.; Priddle, J.; Morris, D.J.; Ricketts, C. 1996 Moult in relation to some aspects of reproduction and growth in swarms of Antarctic krill,Euphausia superba. Marine Biology, 127 (2). 201-208. https://doi.org/10.1007/BF00942104 <https://doi.org/10.1007/BF00942104> |
op_doi |
https://doi.org/10.1007/BF00942104 |
container_title |
Marine Biology |
container_volume |
127 |
container_issue |
2 |
container_start_page |
201 |
op_container_end_page |
208 |
_version_ |
1766251576873189376 |