13.5. Q uestions and Tasks
309
(NP_ mas s [18]) ELSE 0)+(IF( ( .3*Fi s hwt[8]» Fishwt[1 9])
THEN (NP_ma s s[ 19 ]) ELSE
0 ) + ( IF ( (. 3 *Fishwt[ 8] »F ishwt [ 2 0] ) THEN (NP_ma s s [2 0 ])
ELSE 0) {quantity o f biomass which i s sus ceptibl e t o
cannibalism}
s us_mass [ 9 ] = (I F((. 3 *Fi shwt[9]» Fishwt[10]) THEN
(NP_ma s s[lO]) ELSE 0)+(I F((.3* F i shwt[ 9 ] » Fi s hwt [11 ])
THEN (NP_mas s [l l ] ) ELSE
0 )+(IF (( . 3 *Fishwt [9] » F ishwt[1 2]) THEN (NP_ma s s [12 ])
ELSE 0 ) + (I F ( ( .3* Fi s hwt [9 ] » Fi s h wt [1 3 ]) THEN
(NP_mass[13]) ELSE 0 ) +( I F ( ( . 3* F i s h wt [ 9 ] » Fishwt [ 1 4 ] )
THEN (NP_ma s s[14 ]) ELSE
O)+(IF( (. 3 *Fishwt[9] »Fi shwt[15]) THEN (NP_ ma s s [15 ])
ELSE 0)+(IF((.3 *Fishwt[9]»Fishwt[16]) THEN
(NP_mass[16]) ELSE 0 ) +( I F ( ( . 3 *Fi s h wt [ 9 ] » Fi s h wt [1 7 ] )
THEN (NP_mass[1 7]) ELSE
0)+ (IF( ( .3*Fishwt[9]»Fishwt[1 8]) THEN (NP_mass[1 8])
ELSE 0 ) +( I F (( .3* Fish wt [ 9 ] » F i s hwt [1 9 ]) THEN
(NP_mass [19] ) ELSE 0) +( I F ( ( .3* F i s h wt [9]» F i s hwt [2 0 ])
THEN (NP_mas s[ 2 0] ) ELSE 0 ) {qua n t i ty o f b ioma s s wh i c h is
suscept ible t o c a n nibalism}
s u s _ma s s [lO ] = (IF( ( .3 *F ishwt [10 ]» F i s hwt [11 ]) THEN
(NP_ma s s[ll] ) ELSE 0 ) +( I F ( ( . 3 *F i s h wt [ 1 0] » Fi s h wt [1 2 ] )
THEN (NP_ma s s[12 ] ) ELSE
0)+( IF(( .3* Fishwt [10]»Fishwt[13]) THEN (NP_ma ss[13])
ELSE 0)+( I F(( .3*Fishwt [10]» Fishwt[ 14 ]) THEN
(NP_ mass[ 1 4]) ELSE 0)+ ( I F(( .3* Fi s hwt[10]» Fi s hwt[15])
THEN (NP_ma s s[15]) ELSE
0 )+ (IF(( . 3 *F ishwt [ 1 0 ] »F ishwt[16]) THEN (NP_ ma ss[ 1 6 ])
ELSE 0) +( I F ( ( .3 *Fi s hwt [10 ] » F i s h wt [1 7 ] ) THEN
(NP_mass [17] ) ELSE 0)+(I F((.3* Fi s hwt[10]» Fi s hwt [ 18 ] )
THEN (NP_mass[ 1 8]) ELSE
0)+ (IF(( . 3*Fishwt[ 1 0]»Fishwt[ 19]) THEN (NP_ ma s s [1 9 ] )
ELSE 0 ) + ( I F ( (.3* Fi s hwt [ 10 ]» Fi s h wt [2 0 ]) THEN
(NP_mass[20]) ELSE 0) {quantity of bioma ss which is
susceptible t o c a n n i b a l i s m}
sus_mass [11] = (I F (( .3 *Fi s hwt [1 1 ] » Fi s hwt [ 12 ]) THEN
(NP_mass [12]) ELSE O)+( IF ( ( .3* F i s h wt[ 11]» Fi s hwt [13 ])
THEN (NP_ma s s [13 ] ) ELSE
0)+ (IF( ( . 3*Fishwt[1 1]» Fishwt[ 14] ) THEN (NP_ ma s s [1 4 ] )
ELSE 0 )+( I F ((.3* F i s hwt [ 11 ]» F i s hwt [1 5 ]) THEN
(NP_ma s s [1 5]) ELSE 0)+( I F(( .3* Fi s hwt [1 1 ]»Fi s hwt [1 6] )
THEN (NP_ma s s[16]) ELSE