EVALUATION OF HYBRIDIZATION BETWEEN PANGASIUS DJAMBAL BLEEKER 1846 AND PANGASIANODON HYPOPHTHALMUS (SAUVAGE 1878): BIOMETRIC CHARACTERIZATION AND GROWTH ANALYSIS
Abstract: Possible use of
pangasiid hybrids in aquaculture might generate potential impacts on wild
populations. Therefore, rapid identification tools in the field such as growth
rate are urgently needed. This study examines morphological characters and
growth performance of P. djambal and P. hypophthalmus and their reciprocal
hybrids. A detailed morphological study analysed 32 morphometric measurements
and 5 meristic counts on hybrids of Pangasius djambal and P. hypophthalmus.
Morphometric analysis and meristic counts showed that the reciprocal hybrids
have intermediate characters except for gill rakers number which were lower
than that of parental species. In general, the hybrids have tendency to be like
P. hypophthalmus rather than P. djambal. The only typical character P. djambal
appearing in hybrids is teeth shape, both vomerine and palatine. It was shown
that the true hybrids have seven pelvic fin rays. Eight months of growth
comparison in earthen ponds showed that the hybrids have a better performance
for specific growth rate than the parental stock.
Keywords: genetic;
hybridization; biometric; growth; Pangasiidae
Author: Rudhy Gustiano, Anang
Hari Kristanto
Journal Code: jpperikanangg070009
