Euphausiid Abundance, Based on life stage andsize 
      Kendra Daly, PI 
     The size_fraction value was converted from a fraction to 
       only the denominator of the given fraction (i.e. 1/2 to 2). 
     Parameter name samp_fraction was changed to samp_fraction_denom 
       samp_fraction_denom contains a decimal value of 6.6667 representing 
       the fraction 3/20.  11/09/04 GFH 
     Krill abundance andvolume filtered data temporarily removed while being 
        recalculated.  12/05/05 mda 
     Corrected volume filtered andabundance added. 7/31/08 njc