REPRODUCTIVE ASPECTS OF CULTURED HUMPBACK GROUPER (Cromileptes altivelis) FOR SUPPORTING SEED PRODUCTION
Abstract: Humpback grouper
(Cromileptes altivelis) has been successfully spawned in 2000 by IMRAD
(Institute of Mariculture Research and Development) and there are already the
third generation (F3) currently. The reproductive aspects need to be studied to
support the success of seed production. Humpback grouper reared in floating
cage (F1 and F3) had matured (gonad stage 4) while F2 fish reared in concrete
tanks has spawned. Gonadal maturity stage of 38 fishes from first generation
(F1) and 35 fishes from the third generation were observed in June 2013 and
compared to gonadal maturity stage of 18 fishes from the second generation
observed in June 2009. Samples were measured in total length and body weight
and gonads were taken for histology preparation to determine gonadal maturity
stage and the sex. From the histological observation of the gonads, it showed
that all female humpback grouper were in early maturity stage (stage I and II)
with gonadal maturity index between 0.12% and 5.45%. Further, it was observed
that the same gonad was found in different maturity stage and concluded that
humpback groupers were multiple spawners (asynchronous). By determining gonadal
maturity level, it was also known the minimum size for grouper ready to spawn.
Keywords: gonad; humpback
grouper; Cromileptes altivelis; F1; F2; and F3
Author: Sari Budi Moria
Sembiring, John Harianto Hutapea, Ahmad Muzaki, Ida Komang Wardana, Ni Wayan
Widya Astuti, Retno Andamari
Journal code: jpperikanangg140056
