184 
Fishery Bulletin 1 12(2-3) 
Table 2 
Summary of equations and related statistics used in this study for analyses of Southern Kingfish ( Menticirrhus americanus ) 
collected in Mississippi Sound, Mississippi, between April 2008 and May 2009. W=somatic wet weight (in grams), TL=total 
length (in millimeters), SL=standard length (in millimeters), coefficient of multiple determination (R 2 ), coefficient of cor- 
relation (r), CI=confidence intervals, y=year, (3i=slope of simple linear regression, Po=y- intercept of simple linear regression, 
k-\s a growth rate constant (y -1 ), TL M = is the mean maximum TL (mm), TL t =TL at time t (mm), t=time, r=instantaneous 
rate of increase (mm -1 ), a= coefficient of the power function, b= exponent of the power function, TL 5 0 = total length at 50% 
maturity, pgs% and P 99 %= the age (y) taken to reach 95% and 99% of predicted TL 
Estimated mean para- 
Model name 
Para- 
meter value (minimum 
Analysis 
(model formulation) 
Sex 
n 
R 2 
P 
meter 
to maximum 95% Cl) 
SL vs. TL 
Linear 
Female 
434 
0.96 
<0.001 
Po 
-6.26 (-10.43 to -2.08) 
SL = p 0 + Pi x TL 
Pi 
0.85 (0.83 to 0.87) 
Male 
85 
0.98 
<0.001 
Po 
-8.26 (-13.45 to -3.08) 
Pi 
0.86 (0.84 to 0.89) 
Length-at-age 2-parameter von Bertalanffy 
Female 
89 
0.57 
— 
k 
0.95 y -1 (0.76 to 1.16 y -1 ) 
growth function 
TL t = TLJ1 - e~ kt ) 
TL„ 
303.2 mm (284.7 to 328.6 mm) 
Male 
43 
0.75 
- 
k 
1.12 y -1 (0.99 to 1.26 y -1 ) 
TL «, 
243.7 mm (235.6 to 252.7 mm) 
Weight at 
Power function 
Female 
80 
0.98 
_ 
a 
2.73 x 10- 6 (1.42 x lO- 6 to 4.78 x 10 -6 ) 
length 
W = aTL h 
b 
3.26 (3.16 to 3.37) 
Male 
43 
0.96 
- 
a 
2.16 x 10 -5 (7.14 x 10 -6 to 5.48 x 10 -5 ) 
b 
2.88 (2.71 to 3.09) 
Longevity 
95% and 99% of predicted L„ 
Female 
— 
— 
— 
p95% 
3.6 y 
P99% 
5.1 y 
Male 
- 
- 
- 
P95% 
3.1 y 
p99% 
4.3 y 
Maturity 
2-parameter logistic function 
Female 
396 
0.37 
— 
r 
0.71 y -1 (0.06 to 0.09 y -1 ) 
M TL = (1 + e-'- (TL - rL 5o ) )- 1 
tl 50 
170.6 mm (166.8 to 176.6 mm) 
Table 3 
Percentages of spawning female Southern Kingfish (Menticirrhus americanus ) by month and spawning phase on the basis of 
histological analysis. Samples were collected in Mississippi Sound, Mississippi, between April 2008 and May 2009. Actively 
spawning is a subphase of the spawning-capable phase. 
Spawning Month Feb. 
phases n 44 
Mar. 
49 
Apr. 
44 
May 
45 
Jun. 
40 
July 
41 
Aug. 
33 
Sep. 
49 
Oct. 
37 
Nov. 
13 
Dec. 
2 
Immature 
2 
6 
2 
13 
2 
5 
0 
0 
0 
0 
0 
Developing 
2 
31 
0 
0 
2 
0 
0 
0 
3 
0 
0 
Early developing 
64 
24 
5 
2 
8 
0 
0 
0 
0 
0 
0 
Spawning-capable 
0 
39 
86 
76 
63 
80 
76 
47 
13 
0 
0 
Actively spawning 
0 
0 
7 
9 
15 
15 
15 
12 
0 
0 
0 
Regressing 
0 
0 
0 
0 
10 
0 
0 
8 
35 
8 
0 
Regenerating 
32 
0 
0 
0 
0 
0 
9 
33 
49 
92 
100 
