208 
Fishery Bulletin 99(1) 
B Tampa Bay 
50 
40 
30 
20 
10 b 
0 
Aug. 92 
_2uL22_ 
Jan 1993 
n = 2659 
Apr. 92 
Apr. 93 
Feb^Mir 93 
10 
0 
50 
« 40 
c 30 
<u 
g 20 - 
u 
Sep. 92 
Feb 1993 
n = 597 
— 
1 
- 
■ 
Au*. 92 
_J 
J 
L 
Apr. 93 
Jul 1993 
n = 2005 
Dec. 92 
■--» I I I I ' | 
Aug 1993 
n = 1787 
Nov. 92 
10 
S 8 
Sep. 92 
Mar 1993 
n = 1762 
Jul 92 
-1 1— 1 l 
Sep 1993 
n = 5968 
Jen. 93 
Nov. 92 
30 
% 10 
S o 
eu so 
Apr 1993 
Oct 92 n = 3782 
Jun. 93 
- Apr. 93 
Sep . 92 
~ Feb. 93 
L Jul 92 
! : Dec . 92 
1 1 1 -U-J - i i i 
40 
30 b 
20 
10 
0 
50 r- 
40 
30 
20 — ^ 
i i i i-i 
Nov. 92 Ma y 1993 
i n = 661 
Oct. 92 
Sept 92 
■LJ—LJ. 
I I 1 I 
Jul 93 
Jun. 93 
Nov 1993 
n = 1745 
1— 1 4... I .1111 
Jun 1993 
n = 1226 
Nov. 92 
°ct 92 
40 60 80 100 120 140 160 
Fork length (mm) 
Figure 4 (continued) 
tory-reared juveniles) or our measured growth rates (0.5 
mm FL/day) to Hubold and Mazzetti’s (1982) length for 
age-1 fish (40 mm) suggests that the fish were not one year 
old, but probably only 30 to 40 days old. Using scales from 
H. jaguana collected in Biscayne Bay, Florida, Martinez 
and Houde (1975) cited fish lengths of age class one (106 
mm SL), age class two (136.6 mm SL), and age class three 
(142 mm SL). The majority of the fish growth occurred in 
the first year; there was little increase in size between the 
second and third years. 
Length-frequency modes (Fig. 4) corroborate the growth 
rates for H. jaguana derived from sagittal microstructure 
and are consistent with estimates of 11-13 mm TL per 
month reported by Christmas and Waller (1973) for Missis- 
sippi waters, and 12.5 mm TL per month by Gunter (1945) 
for Texas. Low (1973) reported growth rates from 9 tolO 
mm TL per month for young-of-the-year fish in Biscayne 
Bay, Florida, which are close to those reported in our study. 
Identifying individual age cohorts is subjective, especially 
for older fish where modal groups tend to overlap. 
Multiple recruitment periods are consistent with the se- 
rial spawning behavior of H. jaguana reported by Martinez 
and Houde (1975), who found fish maturing at 78-85 mm 
SL and continuous ripening of oocytes during a protracted 
