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PERKEMBANGAN OOSIT IKAN PATIN SIAM, Pangasianodon hypophthalmus Sauvage, 1878 (PANGASIIDAE; SILURIFORMES) Evi Tahapari; Bambang Iswanto
BERITA BIOLOGI Vol 10, No 3 (2010)
Publisher : Research Center for Biology-Indonesian Institute of Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/beritabiologi.v10i3.748

Abstract

Pangasianodon hypophthalmus is an introduced species of fish culture and fisheries resources in Indonesia. Reproductive biology aspects, e.g. maturity, plays an important role on the fisheries management. There was no detail information of oocytes development of P. hypophthalmus. The aim of this study is to find out the detail of its oocytes development through the observation of whole oocytes and ovarian histological slides microscopically. The results showed that the rhythm of oocyte development of P. hypophthalmus was grouped synchronism, assigned by the presence of two oocyte groups in the mature females, i.e. the large and maturing oocytes which would be spawned soon, and the small ones as the stock and still unyolked for the next spawning. The oocyte development could be devided into five stages, i.e. stage 1 (chromatin nucleolar and perinucleolar) with oocytes diameter less than 300 urn, stage 2 (yolk vesicles and cortical alveolar) with oocytes diameter of 230-660 urn, stage 3 (yolk granules) with oocytes diameter of 430-1,100 urn, stage 4 (migratory nucleus and hydrated) with oocytes diameter of 950-1,260 urn, and stage S (atretic) with oocytes diameter less than 800 m
OPTIMASI PADAT PENEBARAN LARVA IKAN PATIN SIAM (Pangasius hypophthalmus) PADA PEMELIHARAAN SISTEM INTENSIF Didik Ariyanto; Evi Tahapari; Bambang Gunadi
Jurnal Perikanan Universitas Gadjah Mada Vol 10, No 2 (2008)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jfs.8882

Abstract

The goal of this activity was to improve the productivity of Siamese catfish (Pangasius hypophthalmus) backyard hatchery. The research was conducted to identify the optimum density of larvae in the intensive rearing system. Two days post hatching larvae of P. hypophthalmus reared in 18 fiberglass containers size 40x30x30 cm3. The treatment used was 50, 100 and 150 fishes/litre in 6 replicates. A water recirculation system was used in this study and a hi-blower aeration system for oxigen supplay was added in it. The result showed that the density of larvae was not significant difference (P<0,05) for the survival rate at day-30, i.e. 21.34%; 19.78% and 19.71% for 50, 100 and 150 fishes/litre density of larvae, respectively. But the density of larvae was significant difference (P>0,05) for body weight at day-30, i.e. 0.47; 0.34 and 0.25 g/fishes for 50, 100 and 150 fishes/l, respectively.
PERKEMBANGAN OVARI DAN OOSIT IKAN PATIN HASIL PERSILANGAN ANTARA BETINA PATIN JAMBAL (Pangasius djambal Bleeker) DENGAN JANTAN PATIN SIAM (Pangasianodon hypophthalmus Sauvage) Evi Tahapari; Bambang Iswanto
Jurnal Perikanan Universitas Gadjah Mada Vol 10, No 2 (2008)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jfs.8884

Abstract

The aim of the study was to obtain the information of the gonadal development i.e ovary and oocyte of the hybrid between female patin jambal (Pangasius djambal) and male patin siam (Pangasianodon hypophthalmus). The gonadal development was investigated monthly by dissection of fish samples with 225.2-2,238.6 grams of body weight. Observations were carried out visual-macroscopically for shape, colour, and size of the ovaries. The visual-microscopically observations were carried out for both whole oocyte and ovarian histological slides. The results showed that the ovaries were very small, look alike short lobes. Its colour were grey-redish, very fatly, some of which were rudimentary, with gonadosomatic indices (GSI) ranged 0.05-0.92%. The most advanced stage of ovarian development was stage II (developing stage), later developed as regression ovary with major atresia, and never reached mature stage. The intraovarian oocytes developed as stage 1 (chromatin nucleolar and perinucleolar stages) with less than 225 μm in diameter and stage 2 (cortical alveolar and yolk vesicles stages) with 200- 875 µm in diameter, and the most advanced oocyte stage reached stage 2 only. There were no oocytes reached vitellogenesis stage (stage 3, yolk granules stage) neither mature oocyte stage (stage 4, migratory nucleus and hydrated oocyte stages), and showed major atresia, assigned by presence of the atretic oocyte stage (stage 5).
OPTIMASI PEMBERIAN PAKAN BUATAN PADA PENDEDERAN IKAN PATIN (Pangasionodon hypohpthalmus) DI KOLAM YANG DIPUPUK Evi Tahapari; Didik Ariyanto; Bambang Gunadi
Jurnal Perikanan Universitas Gadjah Mada Vol 10, No 1 (2008)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jfs.8927

Abstract

This research aimed to know the optimum formulated feeding patin (Pangasionodon hypohpthalmus) in the fingerling rearing in the fertilized pond. The fish seed were stocked in the fifteen cages of 3x2x1.25 m that were installed in the 50 m2 pond. Each cage was stocked with 600 fish with an average initial weight of 0.37 g and average body length of 2-3 cm. The treatments applied in this research were (A) without formulated feed, (B) 5% of biomass of formulated feed, (C) 10% of biomass of formulated feed, (D) 15% of biomass of formulated feed and (E) 20% of biomass of formulated feed. The protein level of the formulated feed was around 40%. The observations focused on the survival rates of fish, feed conversion ratios, body weight and length. The results showed that there were significant differences among fish treatments on the survival rates, feed conversion, weight and length growth (P<0,05). The survival rates of fish of the treatment A, B, C, D and E were 78.10%, 84.39%, 83.78%, 90.83% and 90.33%, respectively. The feed conversion of the feed given treatments i.e. B, C, D and E were 0.35, 0.62, 0.89 and 1.15, respectively. The weight growth during observation period (6 weeks) were 5.63 g, 15.29 g, 23.37 g, 39.17 g and 42.13 g for the treatments A, B, C, D and E, respectively, while the length increment for those treatments were 4.63 cm, 7.81 cm, 8.91 cm 1.5 cm and 11.05 cm, respectively. The water quality parameters were in the suitable range for fish growth.
Co-Authors Bambang Gunadi Bambang Iswanto Didik Ariyanto