304
v. R. NAIR and T. s. s. RAo:
by patches along the western part of the Arabian Sea in the equatorial area, off the
Somalian and Arabian coasts and in the SE part. Higher values are restricted to the
western part of the Arabian Sea, particularly off the Somali coast (192 per std. haul).
The average number per haul is 1.4 times greater during the SE monsoon.
10. Sagitta minima (GRASSI, 1881)
(Figs. 9a and 9b)
This species is only occasionally encountered in the samples, its range of abundance
varied from 0-10.5%. Maximum density is seen along the southern part of the Arabian
300 30·
N
20·
10·
o·
S
10·
50"
70·
E 80"30.
N
...
. ' s
• ~ 80" 10"
Fig. 9 a. Geographical distribution of S. minima during the SW monsoon
300 30·
N
20'
10·
0°
S
10·
60·
70°
E 80"30.
N
20"
70·
Fig. 9 b. Geographical distribution of S. minima during the NE monsoon