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JPR Advance Access published online on December 6, 2006
Journal of Plankton Research, doi:10.1093/plankt/fbl055
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© The Author 2006. Published by Oxford University Press. All rights reserved. For permissions, please email: journals.permissions@oxfordjournals.org

research-article

Development of micro-scale frequency distributions of plankton for inclusion in foraging models of larval fish, results from a Video Plankton Recorder

R. G. Lough* and E. A. Broughton

Northeast Fisheries Science Center, National Marine Fisheries Service, NOAA, Woods Hole, MA 02453-1097, USA

* glough{at}whsun1.wh.whoi.edu

Received on March 23, 2006; revised on August 25, 2006; accepted on September 25, 2006
  Abstract

A self-contained, analog Video Plankton Recorder (VPR) mounted on a 1-m2 MOCNESS sampling system was used to obtain data on micro-scale (<10 m) distributions of zooplankton as prey for larval cod and haddock during May 1997 and May 1999 on Georges Bank. The negative binomial frequency distribution was selected to best describe the more abundant plankton categories in 10-second bins for 10-m depth intervals. Most of the strata had asymmetrical frequency distributions with low means and low k values indicating a clumped distribution. Water-column stratification was especially important in structuring micro-scale high-density layers of phytoplankton and copepods. The most symmetrical Poisson-like distributions with high means and high k values occurred in the upper 30 m above the base of the thermocline.

Key Words: plankton • patchiness • video recorder • larval fish foraging


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