56 
Fishery Bulletin 95(1), 1997 
Southeastern Cape 
Trawl 
n = 1,322 
0 10 20 30 40 50 60 70 80 90 100 110 120 
Length class (5cm) 
Figure 7 
Total length distributions of Argyrosomus inodorus landed by the 
inshore trawl fishery in the southeastern Cape and in the southern 
Cape, 1990-94. The proportions of immature fish were based on re- 
gional averages of the values for males (drumming muscle method) 
and females presented in Figure 8. 
Sex ratios of Argyrosomus 
P< 0.05. 
Table 3 
nodorus from three regions along the South African eastern seaboard. * = significant difference at 
Total length 
(mm) 
Southeastern Cape 
Southern Cape 
Southwestern Cape 
M : F 
n 
X 2 
M : F 
n 
X 2 
M : F 
n 
X 2 
100-199 
1.4 : 1 
188 
4.2* 
1.2 : 1 
114 
0.9 
200-299 
1 : 1.2 
562 
4.4* 
1.1 : 1 
320 
1.3 
300-399 
1 : 1.7 
1,194 
72.4* 
1.2 : 1 
289 
2.5 
1 : 1.3 
72 
0.9 
400-499 
1 : 2.0 
541 
61.9* 
1.3 : 1 
544 
10.6* 
1 : 3.1 
49 
12.8* 
500-599 
1 : 2.9 
212 
49.1* 
1.5 : 1 
212 
9.1* 
1 : 1.7 
57 
4.0* 
600-699 
1 : 2.0 
119 
7.1* 
1 : 1.2 
76 
0.8 
1 : 2.6 
36 
7.1* 
700-799 
1 : 1.8 
58 
4.4* 
1 : 1.2 
30 
0.1 
1 : 1.8 
61 
13.8* 
800-899 
1 : 1.5 
56 
2.6* 
1.1 : 1 
25 
0.0 
1 : 2.0 
77 
8.1* 
900-999 
1 : 3.2 
25 
6.8* 
1.9 : 1 
43 
3.9* 
1 : 2.8 
57 
12.8* 
1000-1099 
1 : 6.3 
21 
11.6* 
1.3 : 1 
80 
1.0 
1 : 2.6 
29 
5.8* 
1100-1199 
1 : 1.5 
5 
0.2 
1 : 1.1 
30 
0.1 
All sizes 
1 : 1.6 
2,982 
158.7* 
1.2 : 1 
1,764 
20.1* 
1 : 2.1 
446 
57.4* 
