JO. 30·
N
20·
10·
o·
S
10·
Chaetognaths of the Arabian Sea
60·
70·
E sO" 30.
N
Fig. 11 b. Geographical distribution of S. pacifica during the NE monsoon
307
haul). Central parts of the southern and eastern Arabian Sea also have high values. On
average the SW monsoon period has a population density 1. 7 times greater than in the
NE monsoon period. The maximum density of S. pacifica during the SW monsoon covers
large areas, while during the NE monsoon maximum density was noted as isolated
patches. In both periods the values were very low in the northern Arabian Sea.
13. Sagitta pulchra (DONCASTER, 1903)
(Figs. 12 a and 12 b)
This is not a very common species, the percentage range of abundance being 0 -1.2.
Isolated patches are observed near Somalia (280 per std. hau!), Gulf of Aden, near Arabia
JO. 30·
N
20·
10·
S
10·
' .
50·
70·
E BOO 30"
70·
. . .
. , .
N
20"
Fig. 12 a. Geographical distribution of S. pulchra during the SW monsoon