REPRODUCTIVE BIOLOGY AND INDUCED SPAWNING OF Solea solea( (L.) IN EGYPT.

REPRODUCTIVE BIOLOGY AND INDUCED SPAWNING OF

Solea solea( (L.) IN EGYPT.

M. I. ZAK! AND A. K. HAMZA
fIsheries Biology Department. Institute of Oceanography and
fisheries, Al-Anfoushy, Alexandria, Egypt.
ABSTRACT
Experiments conoucted during 1985-1986 at Hex station,
west of Alexandria to induce the flat fish Solea solea (L.)
to breed under the effect of CGTH ad1ministered
intramuscularly Ire described here. Hence sole 15 a
multi spawner fish. the spawning act takes place over a
prolonged season extends from November to March with a peak
on January – February and the emergence of eggs goes over
a number of times.
Particulars of eggs laid, percentage of fertilization
and hatching, the dose and number of injections are dealt
with in this paper.
Successful spawning is a first record for the species
in Egypt. It was achieved after the artificial propagation
and the hatching of eggs thenafter the offsprings were
reared.
The present work is also manlffsting the optimum
temperature of spawning which is 11° to 14°C. The incubation
period lasted for four days and the complete transfonnation
of larvae to fry stage took almost four weeks.
The success of induce breeding soles in laboratory is
proposing a future work on the same line for economical
purpose. in the field of aquaculture in Egypt.