F3 PRIMARY PRODUCTION RATE [g O2 m-2 day-1]

Near the dam, April 1984-March 1985
Net production
  Jan     Feb     Mar     Apr     May     Jun    Jul*1    Aug     Sep     Oct     Nov     Dec
  .41     .54     3.22   53.2*2  1.37*2  2.47*2  .67*2    1.85    1.66    1.32    .50     .64
*1 Unusual value. *2 Estimated from chlorophyll concentration.

Dark respiration
  Jan     Feb     Mar     Apr     May     Jun     Jul     Aug     Sep     Oct     Nov     Dec
  .22     .24     2.00     -       -       -      1.66    .59     .67     .97     .35     .38

Gross production
  Jan     Feb     Mar     Apr     May     Jun     Jul     Aug     Sep     Oct     Nov     Dec
  .63     .78     5.21     -       -       -      2.33    2.44    2.34    2.29    .85     1.02