event  cast  cycle     date_local  lat       lon        depth  niskin  taxon               size_class  abundance  
416    33    Cycle_2   07062010    8.97098   -90.49760  20     16      diatoms             2_to_10     0          
416    33    Cycle_2   07062010    8.97098   -90.49760  20     16      diatoms             10_to_20    6          
416    33    Cycle_2   07062010    8.97098   -90.49760  20     16      diatoms             gt20        0          
416    33    Cycle_2   07062010    8.97098   -90.49760  20     16      diatoms             total       6