Meroplanktonic Stages of Anthozoa in the Indian Ocean
291
Table. 1. Occurrence of anthozoan larvae according to category of sample
Category of samples
Number of
% of total
Larvae present
samples
No. of samples
No. of samples
%
Total
1927
100.00
1065
55
Standard
1548
81.00
943
61
Nonstandard
379
19.00
122
33
Day
1028
53.50
621
61
Night
892
46.50
444
50
SWmonsoon
987
51.00
563
57
NEmonsoon
939
49.00
502
54.5
Table 2. Time and area of zooplankton sampling of 11 cruises in the Indian Ocean
Stn Ship
No. of Average % of
Time
Period
Area
No. and
hauls
catch
hauls
hour
Cruise
per
without
haul
larvae
1. "Diamantina" 19
47
19.0018.4.65 to
7° N -32° S,
1/65
24.00
12.5.65
76°E-1100E
2. "Kagoshima
31
2
35
19.3026.11.63 to 5°N-24°S,
Maru"3
21.00
9.1.64
69° E-80° E
3. "Diamantina" 11
64
20.001. 2. 64 to
21 ° S-33° S,
1/64
23.00
17.2.64
113°E-114°E
4. "Anton
38
2
22
06.1223.5.63 to
lrN-3rS,
Bruun" 2
14.10
17.7.63
69°E-800E
5. "Anton
45
3
44
08.0029.1. 64 to
16°N-42°S,
Bruun" 5
12.45
30.4.64
50° E-75° E
6. "Anton
23
60
08.1017.5.64to
18°N-37°S,
Bruun" 6
19.00
12.7.64
64° E-65° S
7. "Umitaka
28
80
Day
21. 11. 63 to 4° s- 25° S,
Maru" 23, 24
22.1.64
99° E-112° E
8. "Diamantina" 23
4
30
Day
5.5.64to
9°S-32°S,
3/64 and 5/64
15.5.64
105°E-112°E
11. 8.64 to
8.9.64
9. "KoyoMaru" 47
2
40
Night
23.11. 62 to 5° N-32° S,
14 and 16
15.1.63
94° E-110° E
23.11.63 to 8° N -22° S,
25.1. 64
94° E-100° E
10. "Patanela"
25
0
100
Night
6.12.64 to
33° S-46° S,
Surface
21. 2. 65
59° E-114° E
hauls
11. "Pioneer"
40
9
31
Night
16.4.64 to
20 0 N-6°S,
21. 4. 64
81 ° E-102° E.
of catch and season and probably other factors that interfere with vertical migration,
such as stratification of the water.
Hauls during "Diamantina" cruises 1/64 and 1/65 and "Kagoshima Maru" cruise 3,
"Anton Bruun" cruises 2 and 5 indicate that the hour of collection is less important
than the area of collection (Table 2).