662 
Fishery Bulletin 96(4), 1998 
4.0 
3.3 
«g 2.6 
1.9 
1.2 
^ O o° 
• rfPi ®o- 
• -'oTv.-v 
=»• . « 
(9 • □ 
e o«B * ° ^ D 
D .-s> 
4.4 4.6 4.8 5.0 5.2 5.4 
P 
3.6 
3.3-1 
3.0 
2.7 
2.4 
A 
8°° 
* -O . ^ n O 
D O O _ 
°* 
* . 
° ^ 
4.4 4.6 4.8 5.0 5.2 54 
P 
8.55 
8.45 
™ 8.35 
8.25 
8.15 
W 
• A o^ c 
a ,, 5a!« 
. % e 
^ hO oOO 
■qf» 
4.4 
4.6 4.8 5.0 5.2 5.4 
P 
600 
540 
c/5 480 
420 
360 
AA * A 8 
* 
* qfc *., 
□ B * 
o □ □ □ 
4.4 4.6 4.8 5.0 5.2 5.4 
P 
Figure 7 
Scatterplots of significant elemental ratios showing grouping patterns of area and age spotted 
mackerel samples. Open circle = Bowen 3-year-old fish; open square = Hervey Bay 1-year-old fish; 
solid square = Hervey Bay 3-year-o!d fish; solid triangle = Innisfail 3-year-old fish; and solid circle 
= Moreton Bay 1-year-old fish. K, Mg, Na, and P are log f transformed concentrations. 
Table 5 
Jack-knifed cross-validation classification matrix of the frequency of assigned cases in each area (and age) used to differentiate 
spotted mackerel samples. 
Classification of individual spotted mackerel by area 
Area 
Correct (%) 
Bowen (3) 
Hervey (1) 
Hervey (3) 
Innisfail (3) 
Moreton ( 1 ) 
Bowen (3) 
58 
18 
0 
9 
4 
0 
Hervey (1) 
63 
0 
17 
0 
0 
10 
Hervey (3) 
34 
9 
0 
10 
10 
0 
Innisfail (3) 
68 
2 
0 
7 
19 
0 
Moreton (1) 
63 
0 
11 
0 
0 
19 
Total 
57 
29 
28 
26 
33 
29 
