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Effects of preservation on wet weight, dry weight, nitrogen and carbon contents of Calanus helgolandicus (Crustacea: Copepoda)
Williams, R.; Robins, D.B. (1982). Effects of preservation on wet weight, dry weight, nitrogen and carbon contents of Calanus helgolandicus (Crustacea: Copepoda). Mar. Biol. (Berl.) 71(3): 271-281
In: Marine Biology. Springer: Heidelberg; Berlin. ISSN 0025-3162, more
Peer reviewed article  

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Keywords
    Biochemical composition; Biochemistry; Biophysics; Carbon; Dry weight; Nitrogen; Physiology; Wet weight; Calanus helgolandicus (Claus, 1863) [WoRMS]; Copepoda [WoRMS]; Crustacea [WoRMS]; Marine

Authors  Top 
  • Williams, R.
  • Robins, D.B.

Abstract
    The lengths, wet and dry weights, nitrogen and carbon contents of fresh, frozen and formaldehyde-fixed specimens of C. Helgolandicus (Claus) were determined. Samples were collected during May 1980 in the Celtic Sea. Individual Copepodite Stages 3, 4, 5, and Adult Male and Female Stage 6 were measured and analysed, and 36 linear regression equations derived for these variables together with mean values, standard deviations and 95% confidence limits. The range of nitrogen values in the fresh material, expressed as a percentage of dry weight, ranged from 8.08% plus or minus 0.80 (Copepodite Stage 3) to 10.89% plus or minus 0.27 (adult female); carbon values changed from 41.6% plus or minus 3.05 (mean plus or minus 95% confidence limits) for Copepodite Stage 3 to 50.97% plus or minus 2.63 in Copepodite Stage 5. The adult females had a high nitrogen and relatively low carbon content, while the converse was true for Stage 5 copepodites. There was aloss of dry weight from the frozen samples (57%) and the fixed samples (38%) compared with the mean of the fresh dry weight of all stages.

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