2. INFORMATION:-
FORMS SCHOOL IN COSTAL WATERS.
STRONGLY MIGRATORY
FEED ON PHYTOPLANKTON AND
ESPECIALLY DIATOMS .
BREED ONCE A YEAR OFF WESTERN
COAST OF INDIA WHEN
TEMPERTURES AND SALINITY ARE
LOW
3.
4. FROM THE GULF OF ADEN TO
SOUTHEAST INDIA AND POSSIBLY THE
ANDAMAN ISLAND .
IT IS NOT FOUND IN THE RED SEA OR
PERSIAN GULF
MOSTLY FOUND IN INDIAN OCEAN.
8. OIL SARDINES ARE HTEROSEXEXUAL .
THE SEXUAL MATURITY ATTAINED IN 1
YEAR AND 150mm.
USUALLY FEMALE ARE BIGGER THAN
MALE
EGGS ARE PELAGIC WITH CLEAR OIL
GLOBULE .
ON EAST COAST SPAWNING OCCURS
BT FEB AND TILL JUNE ,PEAK SEASON
FEB AND APRIL.
9. IN WEST COAST FROM MARCH TO
JUNE
FECUNDITY:- GONADS ARE
ASYMMETRICAL LOBE IN SARDINES
AND LEFT LOBE IS LARGER THAN THE
RIGHT ONE.
OVERALL AVERAGE OF 37000 -38000.
10. SEX RATIO:- FEMALE ARE TWICE IN
NUMBER.
THE MATURE FEMALE MIGRATES
OFFSHORE WATER FOR THE
BREEDING.