On the nutrition and metabolism of zooplankton XIII. Further studies of steroids in Calanus
The presence in Calanus finmarchicus of the sex hormone oestradiol-17β has been confirmed by gas chromatography-mass spectrometry (GC-MS) using the trimethylsilyl and heptafluorobutyrate derivatives. Levels of the sex hormone testosterone have been measured by radioimmunoassay in Calanus helgolandic...
Published in: | Journal of the Marine Biological Association of the United Kingdom |
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Language: | English |
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Cambridge University Press (CUP)
1979
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Online Access: | http://dx.doi.org/10.1017/s0025315400042636 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0025315400042636 |
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crcambridgeupr:10.1017/s0025315400042636 2024-03-03T08:43:24+00:00 On the nutrition and metabolism of zooplankton XIII. Further studies of steroids in Calanus O'Hara, S. C. M. Gaskellf, S. J. Corner, E. D. S. 1979 http://dx.doi.org/10.1017/s0025315400042636 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0025315400042636 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Journal of the Marine Biological Association of the United Kingdom volume 59, issue 2, page 331-340 ISSN 0025-3154 1469-7769 Aquatic Science journal-article 1979 crcambridgeupr https://doi.org/10.1017/s0025315400042636 2024-02-08T08:42:57Z The presence in Calanus finmarchicus of the sex hormone oestradiol-17β has been confirmed by gas chromatography-mass spectrometry (GC-MS) using the trimethylsilyl and heptafluorobutyrate derivatives. Levels of the sex hormone testosterone have been measured by radioimmunoassay in Calanus helgolandicus collected from Plymouth Sound, and in C. finmarchicus captured off the Norwegian coast. Concentrations in C. helgolandicus varied during the year from 150 to 626 fg/animal, accounting for 2.3 to 437 x 10 -7 % of the lipid content and 10.8 to 64.8 x 10 -6 %percnt; of the total sterol fraction. The mean level in Stage V C. finmarchicus, captured during spring, was 196 fg/animal. Testosterone was identified in C. finmarchicus by GC-MS of the tert -butyldimethylsilyl derivative. Article in Journal/Newspaper Calanus finmarchicus Cambridge University Press Journal of the Marine Biological Association of the United Kingdom 59 2 331 340 |
institution |
Open Polar |
collection |
Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
topic |
Aquatic Science |
spellingShingle |
Aquatic Science O'Hara, S. C. M. Gaskellf, S. J. Corner, E. D. S. On the nutrition and metabolism of zooplankton XIII. Further studies of steroids in Calanus |
topic_facet |
Aquatic Science |
description |
The presence in Calanus finmarchicus of the sex hormone oestradiol-17β has been confirmed by gas chromatography-mass spectrometry (GC-MS) using the trimethylsilyl and heptafluorobutyrate derivatives. Levels of the sex hormone testosterone have been measured by radioimmunoassay in Calanus helgolandicus collected from Plymouth Sound, and in C. finmarchicus captured off the Norwegian coast. Concentrations in C. helgolandicus varied during the year from 150 to 626 fg/animal, accounting for 2.3 to 437 x 10 -7 % of the lipid content and 10.8 to 64.8 x 10 -6 %percnt; of the total sterol fraction. The mean level in Stage V C. finmarchicus, captured during spring, was 196 fg/animal. Testosterone was identified in C. finmarchicus by GC-MS of the tert -butyldimethylsilyl derivative. |
format |
Article in Journal/Newspaper |
author |
O'Hara, S. C. M. Gaskellf, S. J. Corner, E. D. S. |
author_facet |
O'Hara, S. C. M. Gaskellf, S. J. Corner, E. D. S. |
author_sort |
O'Hara, S. C. M. |
title |
On the nutrition and metabolism of zooplankton XIII. Further studies of steroids in Calanus |
title_short |
On the nutrition and metabolism of zooplankton XIII. Further studies of steroids in Calanus |
title_full |
On the nutrition and metabolism of zooplankton XIII. Further studies of steroids in Calanus |
title_fullStr |
On the nutrition and metabolism of zooplankton XIII. Further studies of steroids in Calanus |
title_full_unstemmed |
On the nutrition and metabolism of zooplankton XIII. Further studies of steroids in Calanus |
title_sort |
on the nutrition and metabolism of zooplankton xiii. further studies of steroids in calanus |
publisher |
Cambridge University Press (CUP) |
publishDate |
1979 |
url |
http://dx.doi.org/10.1017/s0025315400042636 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0025315400042636 |
genre |
Calanus finmarchicus |
genre_facet |
Calanus finmarchicus |
op_source |
Journal of the Marine Biological Association of the United Kingdom volume 59, issue 2, page 331-340 ISSN 0025-3154 1469-7769 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1017/s0025315400042636 |
container_title |
Journal of the Marine Biological Association of the United Kingdom |
container_volume |
59 |
container_issue |
2 |
container_start_page |
331 |
op_container_end_page |
340 |
_version_ |
1792498820920115200 |