13.5. Q uestio ns and Tasks
307
(NP_mass[12] ) ELSE 0) +(IF((.3* F i s hwt [4] » Fi s hwt [13 ])
THEN (NP_ma s s [ 1 3 ]) ELSE
0)+ (IF ( (. 3 *Fishwt [ 4] »F ishwt [ 1 4 ] ) THEN (NP_ma s s[1 4])
ELSE 0) +( I F(( .3*F i shwt[4 ]» Fi s hwt[ 1 5 ]) THEN
(NP_ma s s[1 5]) ELSE 0)+(I F((. 3* Fi s hwt[4]» Fi shwt[16])
THEN (NP_ma s s [16]) ELSE
0 ) + (IF( (. 3 *Fish wt [4 ] »F ishwt[ 17] ) THEN (NP_ma s s[1 7])
ELSE 0) +(I F( ( .3*Fi shwt[4 ]» Fi s hwt[ lB]) THEN
(NP_ma s s [ lB ] ) ELSE 0) +(I F((.3* Fi s hwt [4 ]» F ishwt [1 9 ])
THEN (NP_mas s[19] ) ELSE
0 )+(IF(( .3*F ishwt [ 4] »F ishwt[ 2 0] ) THEN (NP_ma s s [2 0 ])
ELSE 0) {quantity o f bi omass which i s suscept ible t o
cannibalism}
sus_mass [5] = (IF(( . 3 *Fishwt[5]»Fishwt[6]) THEN
(NP_mass[6]) ELSE 0 )+(IF((. 3*Fishwt[5]»Fishwt[7]) THEN
(NP_mass[7]) ELSE 0 )+(IF((.3*Fishwt[5]»Fishwt[B]) THEN
(NP_mass[ B]) ELSE 0 )+ (IF ((.3 *Fishwt[5] »Fishwt[9]) THEN
(NP_mass [9]) ELSE 0) +(I F( ( .3 *F i s hwt [ 5 ]» Fi s hwt [1 0 ] )
THEN (NP_mass[ l O] ) ELSE
0)+( IF(( . 3 *Fi shwt[5] »Fishwt[11] ) THEN (NP_ma s s[ l l ])
ELSE 0) +( I F(( .3* Fi s hwt [ 5 ] » Fi s hwt[12 ] ) THEN
(NP_mass [1 2] ) ELSE 0)+( I F(( .3* Fi s hwt[5 ]» Fi s hwt [13] )
THEN (NP_ma s s[13]) ELSE
0 )+ (IF( (. 3 *Fi shwt [ 5 ] » Fishwt [ 1 4 ] ) THEN (NP_ma ss[14])
ELSE 0) +( I F(( .3*F ishwt[ 5]» Fi shwt[ 1 5 ]) THEN
(NP_ma s s[1 5 ]) ELSE 0)+(I F((. 3* Fi s hwt [5]» Fi shwt [1 6 ])
THEN (NP_ma ss[16]) ELSE
0)+(IF(( .3* Fi s hwt[ 5]»Fi s hwt[ 17) l THEN (NP_mas s [17 ])
ELSE 0) +( I F(( .3* Fishwt[ 5 ] » Fi s h wt[lB ]) THEN
(NP_ma ss [l B] ) ELSE 0) +(I F(( .3* Fi s h wt [5] » Fi s hwt [1 9 )
THEN (NP_mass [ 19 ]) ELSE
0)+(IF ( ( .3 *Fishwt[5 ) )>F ishwt[ 2 0] ) THEN (NP_ma s s [20 ) )
ELSE 0) {qua n t i ty of b ioma s s which is susceptible t o
cannibalism}
sus_mass [6] = (IF(( .3 *Fishwt[ 6]»Fishwt[7]) THEN
(NP_mass[7]) ELSE 0)+ (IF( ( . 3 *Fishwt[6] »Fishwt[ B]) THEN
(NP_mass[B] ) ELSE 0) + ( I F ( (. 3* Fi s h wt [ 6 ]» Fi s h wt [ 9 ] ) THEN
(NP_ma s s [ 9 ]) ELSE 0 ) +( I F( (.3* Fi s h wt[6 ]» Fi s h wt[ lO ])
THEN (NP_ma s s [ l O]) ELSE
0)+ (IF ( (.3 *Fishwt [ 6] »Fishwt [l l ]) THEN (NP_ma s s[ l l ] )
ELSE 0)+( I F(( .3* Fi s hwt [6] » Fi s hwt[12 ]) THEN
(NP_ ma ss[ 12]) ELSE 0)+(I F(( . 3* F i s hwt[6]» Fi s h wt[ 13 ])
THEN (NP_mas s[13]) ELSE