Secondary Production

  • William M. LewisJr.
Conference paper


For calanoid and cyclopoid copepods and for Chaoborus the production of each developmental stage was computed separately as follows (Edmondson, 1971; Winberg, 1971):
$$ {P_{i}} = \frac{{{N_{i}}\Delta {w_{i}}}}{{{D_{i}}}} $$
where P i is the production of stage i, N i is the numerical abundance of stage i, Δw i is the change in weight over stage i, and D i is the development time for stage i. The values of D i were obtained from the cohort analysis, which has already been discussed. The values of P i were summed as required to obtain the production of groups of developmental stages or of the entire population.


Biomass Phytoplankton Defend 


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Copyright information

© Springer-Verlag New York Inc. 1979

Authors and Affiliations

  • William M. LewisJr.
    • 1
  1. 1.Department of Environmental, Population and Organismic BiologyUniversity of ColoradoBoulderUSA

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