The length-weight relationship in N. japonicus of the Kerala coast shows
no change in the form of the relationship when classified according to maturity
and sex. The t-test shows that the cubic law does not hold good for this
species. Instances of more than one value of weight for a given value of length
are found more frequently in females than in males. A comparison of the relationships
for the Andhra-Orissa coasts with those of the Kerala coast gives
some differences which probably signify that separate stocks may exist in the
Bay of Bengal and the Arabian Sea
