On the nutrition and metabolism of zooplankton XIII. Further studies of steroids inCalanus
- 1 February 1979
- journal article
- research article
- Published by Cambridge University Press (CUP) in Journal of the Marine Biological Association of the United Kingdom
- Vol. 59 (2) , 331-340
- https://doi.org/10.1017/s0025315400042636
Abstract
The presence inCalanus finmarchicusof 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 inCalanus helgolandicuscollected from Plymouth Sound, and inC. finmarchicuscaptured off the Norwegian coast. Concentrations inC. helgolandicusvaried 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.finmarchicusby GC-MS of thetert-butyldimethylsilyl derivative.This publication has 10 references indexed in Scilit:
- On the nutrition and metabolism of zooplankton XII. Measurements by radioimmunoassay of the levels of a steroid in CalanusJournal of the Marine Biological Association of the United Kingdom, 1978
- Isotopic dilution mass spectrometry of oestriol and oestradiol-17β — an approach to definitive methodsAnalytical and Bioanalytical Chemistry, 1978
- The use of multivariable standard curves in the radioimmunoassay of testosterone and 5α-dihydrotestosteroneSteroids, 1976
- Studies on the mechanism of biosynthesis of wax esters in Euchaeta norvegicaMarine Biology, 1974
- Respiration and nitrogen excretion by some marine zooplankton in relation to their life cyclesJournal of the Marine Biological Association of the United Kingdom, 1968
- Early estrogen action: concomitant stimulations within two minutes of nuclear RNA synthesis and uptake of RNA precursor by the uterus.Proceedings of the National Academy of Sciences, 1966
- Stimulation of Ribonucleic Acid Synthesis by Steroid HormonesPublished by Elsevier ,1965
- STIMULATION OF RIBONUCLEIC ACID SYNTHESIS BY STEROID HORMONES .I. TRANSFER RIBONUCLEIC ACID1965
- A chemical method for the determination of oestriol, oestrone and oestradiol in human urineBiochemical Journal, 1955
- XX.—On the Feeding and Breeding of Calanus finmarchicus under Laboratory ConditionsProceedings of the Royal Society of Edinburgh. Section B. Biology, 1942