Fish Spawning Season Analysis
Ovadiameter and seasonal cycle of maturation
* In the present study it was observed that the ova-diameter increased
(0.045 1.5 mm) alongwith the progression of the maturity stage
(Table.1).
-
* Measurement of ova-diameter and their frequency polygon
distribution at different time of the months of the year was a common
method for determination of maturity cycle of the fish (Macer, 1974).
* The progressive change observe in the intra-ovarian diameter for a
period not less than a year can give an idea of the spawning
periodicity of the fish studies (Biswas, 1993).
* From the percentage occurrence of mature ova in different months
(Fig.4) it is inferred that in O.mossambicus the mature ova showed 4
peaks suggesting 4 times of spawning in a year.
In other words, the fish was a batch spawner and only gravid
ova are released at one time during spawning season.View entire presentation