DeVries and Grimes: Spatial and temporal variation in age and growth of Scomberomorus cavalla 
701 
king mackerel studies (all of which sampled size-se- 
lective fisheries and only one (Beaumariage, 1973) 
of which clearly used simple random sampling), we 
feel our growth estimates are the best available. Most 
important, there is no obvious reason to suspect that 
the bias would be greatly different among regions or 
among years; thus our conclusions about the tempo- 
ral and regional differences in growth should be valid. 
Our finding of similar maximum longevity for both 
sexes differs from all previous studies (except 
Age (yr) 
Figure 3 
Von Bertalanffy growth curves and 95% confidence limits by region and sex for king mackerel collected during 1977-78 and 1986- 
92. Growth curves were calculated by using individual quarterly observed sizes-at-age. The upper three curves in each panel 
represent females; the lower three represent males. 
Tabie 3 
Results of Hotelling’s T 2 tests comparing 1986-92 von Bertalanffy growth curves for king mackerel. The larger group in each 
comparison was randomly subsampled so that it’s sample size equaled that of the smaller group. Underlined Fs in right three 
columns indicate parameters that did not significantly affect growth differences. Values in bold = parameter which most affected 
growth differences. NS = not significant, n = sample size for each group in the comparison. AOF = Atlantic Ocean females; EGF = 
eastern Gulf females; WGF = western Gulf females; AOM = Atlantic Ocean males; EGM = eastern Gulf males; WGM = western 
gulf males. 
Groups 
compared 
Calculated 
F 7 
Denom. 
df 2 
Critical value of F 
needed for 95% Roy-Bose 
simultaneous confidence 
limits to bracket zero 
n 
K 
*0 
AOF-EGF 
363. 8 2 
2,753 
5,502 
28.4 
23 
17.7 
AOF-WGF 
51.2 
1,662 
3,320 
3.2 
01 
L2 
EGF-WGF 
37.6 
1,662 
3,320 
05 
23 
8.2 
AOM-EGM 
46.3 
1,285 
2,566 
16.5 
06 
01 
AOM-WGM 
10.1 
990 
1,976 
9.8 
7.9 
5.7 
EGM-WGM 
10.7 
990 
1,976 
OO 
03 
4.0 
AOF-AOM 
369.6 
2,083 
4,162 
211.8 
53.2 
11.4 
EGF-EGM 
259.5 
1,285 
2,566 
133.3 
13.1 
Ol 
WGF-WGM 
103.1 
990 
1,976 
46.2 
5.0 
oo 
1 Critical F = 3.12 (a = 0.05, 2-tailed test) for all tests. 
2 Numerator df = 3 for all comparisons (3 parameters). 
