300
13. Nile Perch Population Dynamics in Lake Victoria:
THEN(can[16]*(NP_mass[18] /s us_mass[16])) ELSE
0)+(IF(Fishwt[17]>( .3*Fishwt[18])) AND (sus_mass [17] >0)
THEN(can[17]*(NP_mass[18] /sus_mass[17])) ELSE 0)
Natural_Mortality_2[19] =
(IF(Fishwt[1]>( .3*Fishwt[19])) AND (sus_mass [1]>0)
THEN(can[1]*(NP_mass[19] /sus_mass[1])) ELSE
0)+(IF(Fishwt[2]>(.3*Fishwt[19])) AND (sus_mass [2]>0)
THEN(can[2]*(NP_mass[19] /sus_mass[2])) ELSE
0)+(IF(Fishwt[3]>( .3*Fishwt[19])) AND (sus_mass [3]>0)
THEN(can[3]*(NP_mass[19] /sus_mass[3])) ELSE
0)+(IF(Fishwt[4]>(.3*Fishwt[19])) AND (sus_mass [4]>0)
THEN(can[4]*(NP_mass[19] /sus_mass[4])) ELSE
0)+(IF(Fishwt[5]>( .3*Fishwt[19])) AND (sus_mass [5]>0)
THEN(can[5]*(NP_mass[19] /sus_mass[5])) ELSE
0)+(IF(Fishwt[6]>(.3*Fishwt[19])) AND (sus_mass [6]>0)
THEN(can[6]*(NP_mass[19] /sus_mass[6])) ELSE
0)+(IF(Fishwt[7]>(.3*Fishwt[19])) AND (sus_mass [7J>0)
THEN(can[7]*(NP_mass[19] /sus_mass[7])) ELSE
0)+(IF(Fishwt[8] >(.3*Fishwt[19])) AND (sus_mass [8]>0)
THEN(can[8]*(NP_mass[19] /sus_mass[8])) ELSE
0)+(IF(Fishwt[9]>(.3*Fishwt[19])) AND (sus_mass [9]>0)
THEN(can[9]*(NP_mass[19] /sus_mass[9])) ELSE
0)+(IF(Fishwt[10]>( .3*Fishwt[19])) AND (sus_mass [10]>0)
THEN(can[10]*(NP_mass[19] /sus_mass[lO])) ELSE
0)+(IF(Fishwt[11]>(.3*Fishwt[19])) AND (sus_mass [11]>0)
THEN(can[11]*(NP_mass[19] /sus_mass[11])) ELSE
0)+(IF(Fishwt[12]>(.3*Fishwt[19])) AND (sus_mass [12]>0)
THEN(can[12]*(NP_mass[19] /sus_mass[12])) ELSE
0)+(IF(Fishwt[13]>(.3*Fishwt[19])) AND (sus_mass [13]>0)
THEN(can[13]*(NP_mass[19] /sus_mass[13])) ELSE
0)+(IF(Fishwt[14]>(.3*Fishwt[19])) AND (sus_mass[14]>0)
THEN(can[14] * (NP_mass[19] /sus_mass[14])) ELSE
0)+(IF(Fishwt[15]>(.3*Fishwt[19])) AND (sus_mass[15]>0)
THEN(can[15] *(NP_mass[19] /sus_mass[15])) ELSE
0)+(IF(Fishwt[16]>( .3*Fishwt[19])) AND (sus_mass [16]>0)
THEN(can[16] * (NP_mass[19] /sus_mass[16])) ELSE
0)+(IF(Fishwt[17]>(.3*Fishwt[19])) AND (sus_mass [17]>0)
THEN(can[17]*(NP_mass[19] /sus_mass[17])) ELSE
0)+(IF(Fishwt[18]>(.3*Fishwt[19])) AND (sus_mass[18]>0)
THEN(can[18]*(NP_mass[19] /sus_mass[18])) ELSE 0)
Natural_Morta1ity_2[20] =
(IF(Fishwt[1]>( .3*Fishwt[20])) AND (sus_mass [1]>0)
THEN(can[1]*(NP_mass[20] /sus_mass[1])) ELSE