Marine Biology

, Volume 147, Issue 6, pp 1367–1375 | Cite as

Comparison of five methods for estimating growth of Calanus helgolandicus later developmental stages (CV–CVI)

  • L. YebraEmail author
  • R. P. Harris
  • T. Smith
Research Article


The activity of the enzymes aminoacyl-tRNA synthetases (AARS) in adult females and males and copepodites stage V of Calanus helgolandicus was studied at the L4 time-series station in the English Channel from June 2002 to December 2003. AARS activity was explored as an index of somatic growth in the laboratory as well as in the field by comparison with other methods of measuring growth: (1) the direct method (Heinle in Chesapeake Sci 7:59–74, 1966), (2) the weight increment (WI) method, (3) the Hirst and Bunker (HB) equation (Limnol Oceanogr 48(5):1988–2010, 2003) and (4) the egg production (EPR) method. AARS activity showed a significant correlation with the direct measurement of growth in the laboratory (R 2=0.55). However, the correlation was lower for growth assessed either with the WI or the HB approaches in the field (R 2=0.05–0.17). Female AARS activity showed a positive correlation with specific EPR during the reproductive season (R 2=0.40) but no relationship was found during the non-reproductive period.


Reproductive Season Somatic Growth Individual Biomass Copepod Production Copepodites Stage Versus 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.



We would like to thank the crew of the Sepia and Squilla for their help with sample collection. We also thank Dr D. Bonnet and Dr A. G. Hirst for their comments on the manuscript. This work was supported by a grant from the Spanish Ministry of Education, Culture and Sport to L. Yebra. Completion was funded by the NERC Marine Productivity Thematic Programme (grant NE/C508418/1). This work is a contribution to the Plymouth Marine Laboratory Core Strategic Research Programme.


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Copyright information

© Springer-Verlag 2005

Authors and Affiliations

  1. 1.Plymouth Marine Laboratory, Prospect PlacePlymouthUK

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