Nüsslein-Vollhard, 1994; Roosen-Runge,
1938; Sander and Baumann, 1983; Westerfield,
2000; Wixon, 2000).
Care should be taken to select a strain
with continuously high egg production
and high fertilisation rate. Under spawning
conditions, males can easily be distinguished
from females by their more slender
body shape and an orange to reddish
tint to the silvery bands along the body.
Due to the large number of eggs produced,
females can be recognised by their