The ¢rst experiment was designed to determine
hatching success and the e¡ect of triploidization on
hybridization success. For these purposes, gametes
were divided into eight groups as follows: O,
O<C, O, O<T, O, S<C, O, S<T,
S, O<C, S, O<^T, S, S<C and S, S<^T,
where O indicates Oncorhynchus mykiss, S indicates
Salmo labrax, C indicates unshocked control and T is
shock-induced triploid. Triploids were produced by a
26.5 1C thermal shock lasting 20min and initiated
25min after the fertilization of the eggs in each
crossed groups (Blanc & Maunas 2005). Fertilized
eggs were incubated at 9^11 1C in springwater before
and after shock treatment. Incubation length, percentage
of eyed egg (%), alevin yield (%) and swim
up fry were determined.
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