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Marine Biology

, Volume 132, Issue 1, pp 67–77 | Cite as

Zooplankton growth rates: the influence of size and resources in tropical marine copepodites

  • R. R. Hopcroft
  • J. C. Roff
  • M. K. Webber
  • J. D. S. Witt
Article

Abstract

Growth rates were determined for copepodites of the genera: Acartia, Centropages, Corycaeus, Oithona, Paracalanus, Parvocalanus and Temora in nearshore waters of Jamaica from in situ microcosm incubations. At these high local temperatures (∼28 °C), total copepodite development time was as short as 4 to 5 d. Mean instantaneous growth rates (g) ranged from as high as 1.2 d−1 to as low as 0.1 d−1. In general, cyclopoid copepods appeared to grow more slowly than calanoids of the same size. Enhancement of resources by nutrient addition caused a 32% increase in growth rates in experiments from a mesotrophic site, but only a 17% increase at a more eutrophic site. Additionally, copepodites at both sites showed faster development and generally larger size at stage in response to nutrient addition. Growth rates were positively related to chlorophyll concentration in the >2 μm size-fraction. A significant relationship of growth rate to body size (r 2 = 0.45) emerged across a wide range of trophic status, but it was confounded with resource availability. It appears that growth in tropical copepod copepodites may be frequently limited by resources in a size-dependent manner.

Keywords

Growth Rate Chlorophyll Nutrient Addition Trophic Status Chlorophyll Concentration 
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.

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Copyright information

© Springer-Verlag Berlin Heidelberg 1998

Authors and Affiliations

  • R. R. Hopcroft
    • 1
  • J. C. Roff
    • 1
  • M. K. Webber
    • 2
  • J. D. S. Witt
    • 1
  1. 1.Department of Zoology, University of Guelph, Guelph, Ontario, N1G 2W1, CanadaCA
  2. 2.Zoology Department, University of the West Indies, Kingston 7, Jamaica, West IndiesJM

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