Cyclograpsus cinereus — Costlow and Fagetti 
167 
TABLE 1 
Comparison of Original Number of Larvae of Cyclograpsus cinereus, Maintained at Different 
Combinations of Salinity and Temperature, Survival to Megalops and Crab Stage, and 
Time Required for Developme nt Through All Larval Stages 
TIME OF 
DEVELOPMENT 
(days) 
SALINITY 
(ppt) 
TEMP. 
°C 
ORIGINAL 
NUMBER 
PERCENT 
TO 
MEGALOPS 
PERCENT 
TO 
CRAB 
HATCH 
TO 
megalops 
MEGALOPS 
DURATION 
HATCH 
TO 
CRAB 
30 
20 
100 
70.0 
45.0 
24-33 
25.7 
15-31 
20.3 
40-57 
45.7 
35 
20 
100 
61.0 
38.0 
25-29 
26.0 
15-29 
22.0 
40-56 
47.7 
30 
25 
50 
30.0 
2.0 
19-24 
20.7 
13 
30 
35 
25 
50 
44.0 
10.0 
18-21 
19.7 
14-16 
15.0 
33-35 
34.2 
35 
30 
50 
0.0 
0.0 
— 
— 
— 
* Average figures given in bold type. 
The eyes are not stalked. The ventrolateral 
edge of the carapace bears 8 small spines. The 
abdomen (Fig. 1, B) consists of 5 segments 
plus the telson. The second abdominal segment 
has a short lateral hook directed anteriorly. The 
telson formula is 3 plus 3 spines and the furcal 
rami are denticulate. 
The antennule (Fig. 1, C) bears 2 long 
aesthetes and 2 shorter, unequal setae. The 
antennal peduncle (Fig. 1, D) is unsegmented 
and terminates as a large, denticulate spine. The 
exopodite is shorter and terminates as 2 un- 
equal spines. The bisegmented endopodite of 
the maxillule (Fig. 1, F) bears 4 terminal 
setae, 1 subterminal seta on the second segment 
and a single seta on the first segment. The 
basipodite has 5 terminal plumose spines and 
the coxopodite bears 4 terminal and 1 sub- 
terminal setae. Four unequal soft, plumose setae 
fringe the distal border of the scaphognathite 
of the maxilla (Fig. 1, G), and the apical tip 
terminates as 1 plumose hair. The bilobate 
endopodite bears 2 plumose setae on each lobe 
and its margins are covered with numerous 
fine hairs. The bilobed coxopodite and basipo- 
dite bear 5-4 and 2-4 plumose setae respec- 
tively. The basopodites and exopodites of max- 
illipeds one and two are as shown in Figure 1, 
H and 1. The 5 -segmented endopodite of the 
first maxilliped has a setation of 2, 1,1, 2, 5 (Fig. 
1, H) . The 3-segmented endopodite of the 
second maxilliped (Fig. 1, I) has a setation of 
0,1,5. 
The pattern of chromatophores is consistent 
for all five zoeal stages. The location of melano- 
phores in the carapace is as follows: (a) 1, 
median and dorsal to eyes; (b) 1 pair, ventro- 
lateral border; (c) 1 pair, median-lateral, poster- 
ior margin. Melanophores of the zoeal append- 
ages are as follows: 1 at basis of the antenna; 
1 in mandible; 1 in labrum; and 1 in basipodite 
of first maxilliped. In the abdominal segments 
1 melanophore is found dorsal to the gut in 
segments one through four, 1 in the midventral 
region of segments two through five (in first 
and second zoea), and through six (in third to 
fifth zoea), and 1 pair in the posterior-lateral 
corner of segment five. 
SECOND ZOEA (Fig. 2, A-I) : The eyes are 
stalked, the dorsal spine is no longer gibbose, 
and the lateral spines are present (Fig. 2, A). 
The ventrolateral borders of the carapace bear 
6 small spines plus 6 setae and there are 2 
spines on the posterior, middorsal margin. 
Antennule now bears 4 aesthetes, approximately 
equal in length (Fig. 2, C). Changes in seta- 
tion of the appendages are limited to the fol- 
lowing: basipodite of maxillule has 5 spines 
