Production in the Indian Ocean and the Transfer from the Primary to the Secondary Level 479
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Fig. 4. Secondary production in the Indian Ocean in gC m- 2 180 day-t, a) in the SW monsoon;
b) in the NE monsoon
were calculated for each 5° square. MARSHALL and ORR (1955) give the duration of
copepodid stages at 10° C and at 15° C, together with the relative duration of all stages
during one generation. A relationship between the duration of a generation and
temperature was established: D = 71.72 t-1.22, where t is temperature in ° C and D is
duration of the copepodid generations in days. Then stock in gC m -2 is raised by