a male pike is a Jack.

the only reason we call all small pike jacks is because the male don't grow
as large as the females so we tend to call smaller pike jacks, so you cant
call an average weight for a jack as it depends on the average size of the
males in the water.
hope this answers the question.

all the best.
Phil.
"SS" wrote in message
...
what defines a pike as being a Jack pike?

SS