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INDONESIA
Jurnal Perikanan Universitas Gadjah Mada
Published by Universitas Gadjah Mada
ISSN : 08536384     EISSN : 25025066     DOI : -
Core Subject : Science, Agriculture,
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Immunology & microbiology
Jurnal Perikanan Universitas Gadjah Mada are published to promote a critical review of the various investigative issues of interest in the field of fisheries between the researchers, academics, students and the general public, as a medium for communication, dissemination, and utilization of wider scientific activities.
Arjuna Subject : -
Articles 16 Documents
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Search results for , issue "Vol 10, No 1 (2008)" : 16 Documents clear
KARAKTERISTIK SURIMI DARI CAMPURAN DAGING MANYUNG DAN CUCUT Iwan Yusuf Bambang Lelana; Amir Husni
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.8934

Abstract

Manyung (Arius spp.) and shark (Carcharhinus sp.) are the most of low value fishes in Yogya. In order to increase the value, the fishes were processed into surimi. In this research, fishes were mixed in different ratio of manyung and shark, namely 90%:10%, 70%:30%, 50%:50%, 30%:70%, and 10%:90%. The water content, protein content, lipid content, sensory properties and gel strength were determined. The result showed that surimi from manyung and shark in ratio of 90%:10% produced the highest folding test value (AA) and the highest score of sensory properties.
UPAYA PENURUNAN TINGKAT KANIBALISME RAJUNGAN (Portunus pelagicus) DENGAN PEMBERIAN SUPLEMEN TRIPTOFAN Suharyanto Suharyanto; Yani Aryati; Suwardi Tahe
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.8944

Abstract

The aim of this experiment was to find out the suitable dosage of tryptophan mixed in diet of trash fish were fed and to decrease canibalism levels of swimming crabs (Portunus pelagicus) reared in fiber glass tanks. The research was conducted in research station of Research Institute for Brackishwater Aquaculture Maranak, Maros South Sulawesi on 8th May to 8th June 2006. Twelve fiber glass tanks were used of this research and the dimention of 1 x 1 x 0.5 m. Crablet of 17th from hatchery were used to this research and the dimention of 7.2 + 0.2 mm width and 0.05 + 0.02 g body weight. Hundred crablets were spreaded on the each tanks. The treatments were applied of dosage of tryptophan were mixed in the trash fish (Sardinella sp) as much as (A): 0% of biomass total, (B): 0.5%, (C): 1.0% and (D): 1.5% of biomass total with three replicates respectively. Variables monitored growth of charapace width and body weigth, canibalism levels, survival rate of swimming crab and water quality. Experimental design used complate randomized design. During of rearing were fed trash fish (Sardinella sp) with frequency of three times a days of dosage 15% of total body weight. The result showed that the crablet fed the diet with additional 1.5% tryptophan had significantly lower (P<0.05) cannibalisms compared to the crablet feed the control diet. The crablet fed the diet with additional 1.5% tryptophan had significantly higher (P<0.05) survival rate compared to the crablet fed the control diet. However, there were not significantly different specific growth rate among the treaments. Based on this result that additional 1.5% tryptophan could be decrease cannibalisms of swimming crabs crablet during experiment.
PENGARUH SALINITAS TERHADAP METABOLISME KEPITING BAKAU (Scylla olivacea) Muhammad Yusri Karim
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.8926

Abstract

The aim of this research was to know the effect salinity on metabolism of mud crab (Scylla olivacea). The research was carried out in circular plastic tanks consist of water at amount 16 l in closed system. The expriments were done using complete randomized design with 4 treatments and 3 replication. The salinity treatments were: (A) 5, (B) 15, (C) 25 and (D) 35‰. The Test animal used were female mud crab with average body weight was 20 ± 0,5 g that stocked by three individuals per tank. Analysis variance and Tukey test were used to reveal the effect of treatments. The result showed that salinity was significantly (p < 0,01) affect to basal, feeding, routine metabolism and SDA (Spesific Dynamic Action). The highest value of mud crab basal metabolism rate was 0.17 kJ/g body weight/day produced at salinity 5‰ and the lowest was 0.14 kJ/g body weight/day. The highest value for feeding, routine metabolism rate and SDA of mud crab produced at 25‰ with 0.49; 0.42 dan 0.35 kJ/g body weight/day, respectively, and the lowest were 0.47; 0.37 dan 0.30 kJ/g body weight/day that resulted by salinity of 5‰. For culture purpose of mud cab, it is recommended to use the salinity level of 25‰. 
PERKIRAAN PADAT TEBAR OPTIMUM BERDASARKAN KEBUTUHAN OKSIGEN TERLARUT PADA IKAN KERAPU TIKUS (Epinephelus cromileptes) DAN KERAPU MACAN (Epinephelus fuscogutattus) Arif Dwi Santoso; Wahyu Purwanta
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.8935

Abstract

The objective of this research was to find out the optimum stocking density of Grace Kelly grouper (Epinephelus cromileptes) and Tiger grouper (Epinephelus fuscogutattus) based on the dissolved oxygen budged.The experiment of fish respiration and general oceanographic surveys were conducted in aquaculture area of Hurun Bay, Lampung, in June 2003. The main equipment, namely transparant fish chamber that equipped with dissolved oxygen (DO), temperature sensor and a pump were constructed to measure the DO consumption of groupers. Environmental parameters of Hurun Bay estuary, such as DO, temperature, water-river supply, turbidity, salinity and water current were monitored at the site of 13.5 m3 floating net cage. The range and average of DO inside the cage was 3.68 – 6.76 (5.35) mg/L with water temperature 28.64 – 29.72 (29.09)0C, salinity 32.69 – 33.0 (32.94)o/oo and turbidity 0.27 – 13.62 (1,15) NTU, respectively. Inflow water rate of cage was 72 m3/hr and current velocity 2.3 - 5.1 cm/s. The respiration rate of juvenile and smaller were higher than adult fish. The exponential functions of optimum stocking density was found for E. cromileptes and E. fuscogutattus Y = 2806 X -0.8924 and Y = 1505.6 X -0.632 , respectively. There are two ways in order to increase stocking density, namely extention in area and increasing in volume of cage. On the base of DO budged, an estimation optimum stocking density for E. cromileptes was 134 ind/m3 for fish 50 g in average, 32 ind/m3 for fish 200 g and 8 ind/m3 for fish more than 1200 g. Meanwhile the optimum stocking density for E. fuscogutattus was 176 ind/m3 for fish 50 g in average, 63 ind/m3 for fish 200 g and 17 ind/m3 for fish more than 1200 g.
ISOLASI DAN KARAKTERISASI BAKTERI PENDENITRIFIKASI YANG DIISOLASI DARI LUMPUR KAWASAN MANGROVE Triyanto Triyanto; Alim Isnansetyo; Irfan D. Prijambada; Jaka Widada; Duranta D. Kembaren
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.8912

Abstract

The aim of this research is to isolate denitrifying bacteria which have the highest activity to reduce nitrate. The sources of the denitrifying bacteria were mangrove sediment collected from Cilacap Regency, Central Java and Indramayu Regency, West Java. Basalt medium containing KNO3 as a source of nitrogen was used for isolating the denitrifying bacteria. Double layer agar was used for making anaerob condition. Fourty-one isolates were obtained at the first step of the isolation, 29 of them have nitrate reduction activity at a range of 0.77-95.62%. Three isolates, i.e. D19.2, DR2.1 and D27.3 having the highest activity were selected for further examination. The selected isolates were characterized and identified. Characterization includes colony and cell morphology, Gram staining, motility, spore staining and biochemical tests as catalase and oxidase. Identification was done by using profile matching to Bergey’s Manual of Determinative Bacteriology. The results indicate that isolate D19.2 and D27.3 have similarities to the characters of genus Listeria, whereas isolate DR2.1 has similarities to the characters of genus Propionibacterium. All of the selected isolates were able to grow in a medium having NaCl concentration at a range of 0.5-3.5% and pH range of 5-8. Observation of nitrate reduction ability of the isolates during five days incubation shows that isolate DR2.1 has the highest denitrifying activity. The selected isolates can be used as bioremediation agents for controlling nitrate pollution in brackish water pond.
PENGARUH PERBEDAAN AWAL PEMBERIAN ARTEMIA TERHADAP PERTUMBUHAN DAN SINTASAN PADA PEMELIHARAAN LARVA IKAN KLON (Amphiprion ocellaris) Ketut Maha Setiawati
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.8946

Abstract

The objective of this research was to find out the best time for nauplii artemia delivered in larva rearing of clown fish (A. ocellaris). Fiberglas tanks of 200 L were used as larva rearing container, and filled with 100 l filtered seawater. Eggs of clown fish were stocked at 100 individual in each tank. The treatment of different initial feeding time of nauplii artemia were set up as A) at Day 6, B) Day 10 and C) Day 15. The results showed that there were no significant differences among treatments to the growth rate but the survival rate at treatment A was the highest. Total length of the larvae were similar among treatment, namely A) 10.2±0.9 mm, B) 10.3±0.5 mm, and C) 9.9±0.8 mm. Survival rate was A) 81±11.3%, B) 62±0% and C) 67±5.7%, respectively.

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