Evaluation of Pangasius Djambal Bleeker 1846 and Pangasianodon Hypophthalmus (Sauvage 1878) Hybrids: Biometric, Growth, and Ovarian Maturation

Hybridization program has been used to increase fish production for more than three decades. Concern to this program is due to the problem of potential impact on wild population. Hence, it is urgently needed to provide quick identification tools in the field and as well as commercial aspect in term of growth rate. This study investigated biometric characters, growth performance, and ovarian development of Pangasius djambal and Pangasianodon hypophthalmus and their reciprocal hybrids. A detailed morphological analysis was done on the hybrids of P. djambal and P. hypophthalmus. Earthen pond on the growth comparison as well as the ovarian development was also observed. The results of morphometric and meristic showed that the reciprocal hybrids have intermediate characters except for gill rakers numbers in which lower than that of parental species. Growth analysis showed that hybrids has better performance compare to the parental one, while ovarian development of hybrids was developed abnormal. No oocytes reached vitellogenesis and showed major atresia and fatty. It can be concluded that hybrids of P. djambal and P. hypophthalmus is true hybrids. The hybrids can be used as final seed for aquaculture production due to clearly identify from parents, superior growth performance and steril

Efektivitas Pemberian Zeolit, Arang Aktif, Dan Minyak Cengkeh Terhadap Hormon Kortisol Dan Gambaran Darah Benih Ikan Patin Pangasionodon Hyppophthalmus Pada Pengangkutan Dengan Kepadatan Tinggi [Effectivity of Utilization of Zeolite, Activated Charcoal, and Clove Oil to Cortisol Hormone on the High Density Transportation System of Juvenile of Pangasionodon Hyppophthalmus]

Penelitian ini bertujuan untuk menentukan pengaruh pemberian zeolit, arang aktif dan minyak cengkeh dalam memper-tahankan kualitas air media pada pengangkutan ikan berkepadatan tinggi , sehingga dapat meminimalisasi tingkat stres yang dapat diketahui dari tingkat konsentrasi hormon kortisol dan gambaran darah ikan dan dapat meminimalisasi ting-kat kematian ikan. Penelitian dilakukan pada skala laboratorium dengan Rancangan Acak Lengkap. Ikan yang diguna-kan yaitu ikan patin dengan bobot rata-rata 2 g/ekor. Dosis zeolit, arang aktif dan garam yang digunakan yaitu B (20 g zeolit + 10 g arang aktif), C (20 g zeolit + 10 g arang aktif + 3 ppm minyak cengkeh), D (20 g zeolit + 10 g arang aktif + 6 ppm minyak cengkeh), E (20 g zeolit + 10 g arang aktif + 9 ppm minyak cengkeh), F (20 g zeolit + 10 g arang aktif + 12 ppm minyak cengkeh), dan A (tanpa zeolit, arang aktif dan minyak cengkeh). Hasil penelitian menunjukkan pem-berian 20 g zeolit + 10 g arang aktif + 9 ppm minyak cengkeh dalam pengepakan sistem tertutup selama 72 jam mem-berikan hasil terbaik, yaitu, kadar NH3 terendah mencapai 0,0389±0,004 mgl-1, CO2 50,42 mgl-1, SR tertinggi sebesar 83,11% dan memiliki tingkat stres yang lebih rendah baik dilihat dari konsentrasi hormon kortisol terendah dan gambaran darah mendekati ikan normal