4. Discussion
The non-speci®c immune response of tilapia,
O. niloticus was compared between dierent isogenic
lines using an array of non-speci®c immunological
parameters. Up until now, there
have been few reports in the literature regarding
the innate immune response of tilapia [20±22], so
a preliminary study was carried out with a small
number of ®sh to standardise immunological parameters
for this species (data not shown).