Fecundity with race.
different Stok Fecundity of [is] same species have been weared for the distinguishment of race by many researcher. Different race have the nature of large size unegual fecundity and so do its egg. Hence species coming from one arrest area can know from amount of its egg. Pursuant to this matter, population can know heterogeneous or homogeneous. Fishs from one species live in various habitat like different river or in territorial water which, differing latitude possible have difference of egg in its its.
source : M. Ichsan Effendie