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13. Nile Perch Population Dynamics in Lake Victoria :
one_hundred_to_125 [Cohorts] =
IF((Fishwt[Cohorts] /1000» = 100)
AND((Fishwt[Cohorts] /1000)<125) THEN NP_number[Cohorts]
ELSE 0
one_hundred_to_125_2 = ARRAYSUM(one_hundred_to_125[*])
one_seventy_five_to_200[Cohorts] =
IF((Fishwt[Cohorts] /1000» = 175)
AND((Fishwt[Cohorts] /1000)<200) THEN NP_number[Cohorts]
ELSE 0
one_seventy_five_to_200_2 =
ARRAYSUM(one_seventy_five_to_200[*])
one_to_five[Cohorts] = IF((Fishwt[Cohorts] /1000» = 1)
AND((Fishwt[Cohorts] /1000)<5) THEN NP_number[Cohorts]
ELSE 0
one_to_five_2 = ARRAYSUM(one_to_five[*])
one_twenty_five_to_15 0 [Cohorts] =
IF((Fishwt[Cohorts] /1000» = 125)
AND((Fishwt[Cohorts] /1000)<150) THEN NP_number[Cohorts]
ELSE 0
one_twenty_five_to_150_2 =
ARRAYSUM(one_twenty_five_to_150[*])
seventy_five_to_100[Cohorts] =
IF((Fishwt[Cohorts] /1000» = 75)
AND((Fishwt[Cohorts] /1000)<100) THEN NP_number[Cohorts]
ELSE 0
seventy_five_to_100_2 =
ARRAYSUM(seventy_five_to_100[*])
ten_to_twenty[Cohorts] = IF((Fishwt[Cohorts] /1000»
10) AND((Fishwt[Cohorts] /1000)<20) THEN
NP_number[Cohorts] ELSE 0
ten_to_twenty_2 = ARRAYSUM(ten_to_twenty[*])
thirty_to_forty[Cohorts] = IF((Fishwt[Cohorts] /1000» =
30) AND((Fishwt[Cohorts] /1000)<40) THEN
NP_number[Cohorts] ELSE 0
thirty_to_forty_2 = ARRAYSUM(thirty_to_forty[*])
twenty_to_thirty[Cohorts] = IF((Fishwt[Cohorts] /1000»
= 20) AND((Fishwt[Cohorts] /1000)<30) THEN
NP_number[Cohorts] ELSE 0
twenty_to_thirty_2 = ARRAYSUM(twenty_to_thirty[*])
two_hundred-p1us[Cohorts] = IF((Fishwt[Cohorts] /1000»
= 200) THEN NP_number[Cohorts] ELSE 0
two_hundred-p1us_2 = ARRAYSUM(two_hundred-p1us[*])