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Jurnal Perikanan Universitas Gadjah Mada

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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.

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Articles 10 Documents

Search results for , issue "Vol 21, No 2 (2019)" : 10 Documents clear

Isolation of Cellulolytic Bacterium Staphylococcus sp. JC20 from the Intestine of Octopus (Octopus sp.) for Fish Probiotic Candidate Indah Istiqomah; Alim Isnansetyo; Imelda Novita Atitus; Ahmad Fauzi Rohman
Jurnal Perikanan Universitas Gadjah Mada Vol 21, No 2 (2019)
Publisher : Universitas Gadjah Mada

Aim of this study was to isolate, characterize, and identify cellulolytic bacteria from the digestive tract of marine vertebrates and invertebrates as a candidate of fish probiotics. The bacteria were isolated from the digestive tract and grown on a cellulose agar plate. The bacteria were screened based on the cellulolytic activity, acid resistance, antagonist activity against fish pathogens, antibiotics sensitivity, ability to live in fish digestive tract and non-pathogenic test. Selected bacterium was identified molecularly, based on the 16S rDNA gene sequences, and phenotipically. A total of 14 bacteria demonstrated celulolitic index of 1.1-1.8. The bacteria with cellulolytic index of > 1.6 were screened by the selection criteria, resulted a selected strain, JC20 isolate which was isolated from the digestive tract of octopus (Octopus sp.). The selected bacterium was sensitive to antibiotics, resists to acidic environment, able to live in the fish digestive tract, and non-pathogen. Thus, the bacterium was potential for further characterization as fish probiotics candidate. Molecular and phenotypic identification revealed that JC20 isolate was Staphylococcus sp.

Shelf Life of Tilapia (Oreochromis niloticus) Dumplings with addition of Bagasse Liquid Smoke during Storage at Chilling Temperature (±5°C) Eka Handayani; Fronthea Swastawati; Laras Rianingsih
Jurnal Perikanan Universitas Gadjah Mada Vol 21, No 2 (2019)
Publisher : Universitas Gadjah Mada

Tilapia (Oreochromis niloticus) can be used to process fish dumplings. Tilapia dumplings are susceptible to microbiological quality deterioration so that the shelf life is low. The liquid smoke of bagasse contains phenol, acid, and carbonyl that can be used as natural preservatives to extend the shelf life of fish dumplings. The aim of this study was to determine the effect of adding bagasse liquid smoke to the quality and shelf life of tilapia dumplings by treating the concentration of liquid smoke stored in chilling temperatures (±5°C). The material used tilapia and bagasse liquid smoke. The experimental method used split-plot in time 2 factors, differences concentration of liquid smoke (0% and 2.5%) and storage time (0, 5, 10, 15, 20 days) with 3 repetitions. The testing parameters of fish dumplings are a sensory test, total phenol, TPC, TVBN, and pH. Non-parametric data were analyzed using Kruskal-Wallis and Mann-Whitney for further test. Parametric data were analyzed using ANOVA and BNJ for further test. The result shows that tilapia dumplings without the addition of liquid smoke rejected on the 10th day with a sensory value 5.63±0.47; total phenol 102.04±0.00; TPC 5.2×104±0.01CFU/g; and pH 7.42±0.08 while according TVBN value rejected on the 5th day with 15.13±0.64 mg/100g. Tilapia dumplings with addition of 2,5% liquid smoke rejected on the 15th day with an sensory value 5.87±0.45; total phenol 116.85±0.01; TPC 5.4×104±0.01CFU/g; TVBN 18.82±0.84 mg/100g and pH 7.33±0.10. Bagasse liquid smoke can increase the shelf life of tilapia dumplings up to 10 days during chilling storage.

Characteristics of Dry Noodles with the Addition of Different Fish Scales Evi Nur Fadilla; Yudhomenggolo Sastro Darmanto; Lukita Purnamayanti
Jurnal Perikanan Universitas Gadjah Mada Vol 21, No 2 (2019)
Publisher : Universitas Gadjah Mada

Noodles is an easy-to-serve food product and widely consumed. The weakness of the noodle is in its hard texture, less elastic and easily broken, so it requires the addition of gelling agent for texture improvement. Gelatin is a gelling agent that can be extracted from fish scales. The addition of gelatin from scales of fish that were caught from different habitat (fresh, brackish, and sea) might affects the characteristics of the dried noodles. This study aimed to determine the effect of gelatin prepared from the scales of tilapia, milkfish and sulphur goatfish on the characteristics of dry noodles.The research method was experimental laboratories using a Completely Randomized Design (RAL) with one factor which was gelatin from the difference fish scales (tilapia, milkfish, and sulphur goatfish). The parameters that were observed include protein content, tensile strength, water content, and hedonic analysis (appearance, smell, taste, and texture). The results show that the addition of tilapia, milkfish and sulphur goatfish scales gelatin significantly affected protein levels, tensile strength, moisture content and hedonic analysis of dried noodles. Dry noodles with the addition of gelatin scales of sulphur goatfish were not significantly different from milkfish gelatin, meanwhile dry noodles with the addition of tilapia scales gelatin shows a significant different from the control. Hedonic scores on a scale of 1 to 5 for dry noodles with fish scales gelatin and controls resulted to the appearance, aroma, taste, and texture values which were favored by panelists. These results indicate that the addition of fish scales gelatin produces characteristics of dry noodles that are suitable for consumption according to SNI 8217.2015.

An Integrated Supply Chain Management Based Nila Nirwarna (Oreochromis niloticus) Seed Market Institution Atikah Nurhayati; Ayi Yustiati; Titin Herawati
Jurnal Perikanan Universitas Gadjah Mada Vol 21, No 2 (2019)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jfs.44210

West Java Province is one of the potential areas of freshwater fisheries resources development in Purwakarta District. The utilization of development resources is directed to achieve comparative advantage and competitive advantage as an effort to encourage the growth of regional economy. Purwakarta is one area that has the potential of the aquaculture potential to be developed. One type of aquaculture that has a high economic potential such as tilapia nirwarna fish (Oreochromis niloticus), but in the institutional aspects of marketing there are still constraints from producers to consumers. This research aims to analyze marketing institutional of Nila seed (Oreochromis niloticus) through Integrated Supply Chain Management approach. The type of data used in this research is primary and secondary data. The analytical tool used marketing channels and supply chain risk by testing the validity and reliability of data. The technique of taking respondents using snowball sampling with the number of respondents 30 consisting of suppliers of nirwarna tilapia fish breeders to nirwarna tilapia seed cultivators. Based on the results of the research concluded that the analysis of tilapia supply chain risk has a value of 1.0 means it has a high risk. Based on the research results of the aquaculture business in Purwakarta is divided into two types of business, namely the enlargement effort and fish hatchery business. The marketing institutional of tilapia nirwarna seeds through Integrated Supply Chain Management approach in Purwakarta district through hilirization of tilapia fishery through the stage of input production supply and downstream of tilapia fishery fishery through fish farm institution through production and distribution output stage.

Effects of Twin-Screw Extruders Condition to Physical Properties of Floating Fish Feed Arif Rahman Hakim; Wahyu Tri Handoyo; Toni Dwi Novianto; Andrianto Widi Prasetyo
Jurnal Perikanan Universitas Gadjah Mada Vol 21, No 2 (2019)
Publisher : Universitas Gadjah Mada

Process production of floating fish feed in a society constrained by processing technology. The objective of this study was to observe effect of condition process of twin screw extruders to the physical and chemical properties of produced of floating fish feed. Ingredients used involve fish meal, soybean meal, corn meal, and tapioca flour. The ingredients are mixed with 15, 20 and 25% water added to the total weight. Extrusion process condition conducted by several treatments i.e screw speed (540, 540, 600, 660 rpm) and barrel temperatures (80, 90, 100, 110, 120℃). In order to study, expansion ratio, unit density, floatability and hardness of feed were observed as physical parameters while chemical properties include moisture and protein content. Experimental result showed that addition 25 % water to the formula gives a good performance of expansion ratio, unit density and floatability than 15% and 20% moisture content. Higher of screw speed produces feed with higher ratio expansion, lower unit density, and higher floatability. The optimum of screw speed is 600 rpm. Meanwhile increasing of barrel temperature caused reduction of unit density, and escalation floatability of feed. Best barrel temperature to meet the physical properties is 120℃. The produced feed contain protein 32.38-41.95% and moisture content 4.37-5.70%.

Determination of Optimal Fermentation Condition for N-acetylglucosamine Production Using Mucor circinelloides Extracellular Chitinase Yuniwaty Halim; Hardoko Hardoko; Reinald Febryanto Pengalila
Jurnal Perikanan Universitas Gadjah Mada Vol 21, No 2 (2019)
Publisher : Universitas Gadjah Mada

This research aimed to determine the best fermentation condition, consists of pH, temperature, fermentation time and substrate concentration, in N-acetylglucosamine production from shrimp shells using crude extracellular chitinase obtained from Mucor circinelloides mould. The method used was experimental method with fermentation treatment of different pH (5, 6, 7, 8 and 9) and temperature (30, 40, 50, 60, 70 and 80°C). The optimal pH and temperature of fermentation obtained was used to determine the maximum substrate concentration (0.5, 1, 1.5 and 2%) and fermentation time (2, 4, 6 and 24 hours) to produce the highest concentration of N-acetylglucosamine. The optimal pH for fermentation was 8, with chitinase activity of 4.38±0.06 U/ml, while the optimal temperature was 50°C with enzyme activity of 5.42±0.06 U/ml. Substrate concentration and fermentation time affected the N-acetylglucosamine production. The optimal fermentation condition was obtained with substrate concentration of 1.5% and fermentation time of 2 hours resulted to N-acetyl Glucosamine concentration of 2195.83±15.14 ppm.

Microplastic Abundances in the Sediment of Coastal Beaches in Badung, Bali Maghfira Shafazamilla Mauludy; Agung Yunanto; Defri Yona
Jurnal Perikanan Universitas Gadjah Mada Vol 21, No 2 (2019)
Publisher : Universitas Gadjah Mada

The use of plastic material has increased significantly because of its durability and resistance from degradation. Plastic wastes could degrade into smaller size known as microplastics. The purposes of this study are to analyze and to compare total abundance of microplastic among coastal beaches in Badung, Bali. This study was conducted at five different coastal beaches which are Doublesix Beach, Kuta Beach, Melasti Beach, Mengiat Beach, and Tanjung Benoa Beach. Microplastic abundance was found in the average of 90.7±59.1 particles kg-1. There are three types of microplastic found in this study; film, fiber, and fragment and the abundances were varied among beaches. Fiber dominated all the study areas in the average of 42.8±24.1 particle kg-1. Kuta Beach has the highest amount of microplastic compared to the other beaches with the average of 148.9±103.8 particles kg-1. It might be due to Kuta Beach is the very famous beach visited by many tourists in the Bali Island. Moreover, this study was conducted during monsoon season that has been know to bring plastic wastes to Kuta Beach.

Production of N-acetylglucosamine from Semi Purified Chitinase of Mucor circinelloides that Immobilized by using Agar Lucia Crysanthy Soedirga; Hardoko Hardoko; Natasha Vania Widianto
Jurnal Perikanan Universitas Gadjah Mada Vol 21, No 2 (2019)
Publisher : Universitas Gadjah Mada

Hydrolysis of chitin into N-acetylglucosamine (NAG) can be done enzymatically by using chitinase enzyme that obtained from the fermentation with chitinolytic molds. Mucor circinelloides is one example of chitinolytic mold that can produce semi purified chitinase enzyme during the fermentation of chitin from black tiger shrimp (Penaeus monodon) shell. The semi purified chitinase enzyme that obtained in this research will be immobilized into the agar polymer to the extent of its stability during NAG production. This research was aimed to investigated the best concentration of agar (3,4,5, and 6%) and the best amount of added enzyme (0.2; 0.4; 0.6; 0.8; and 1 mL) toward the production of NAG. The result showed 0.6 ml of semi purified chitinase that immobilized into 3% of agar can produced NAG within the concentration 1111.667 ppm. Moreover, this enzyme considerably stable before and after immobilization within the value of 4.78 U/mL.

Effectivity of Probiotic Bacteria in Feed on Growth and Survival Rate of Common Carp (Cyprinus carpio) Nurbety Tarigan; Firat Meiyasa
Jurnal Perikanan Universitas Gadjah Mada Vol 21, No 2 (2019)
Publisher : Universitas Gadjah Mada

The aim of this study was to examine the effectiveness of the commercial bacterial probiotic addition in feed on growth and survival rate of common carp. This research was conducted from July to September 2018. This study used a completely randomized design (CRD) with four treatments and three replications. The initial body length of juveniles was 5-6 cm with density 1 juvenile/litersfor 42 days. In this research, we used different dosages of commercial probiotics 0, 5, 10 and 15 ml/kg. The results showed that the administration of those probiotics in the feed had a significant effect on the relative growth rate, survival rate, efficiency of feed utilization, and protein efficiency ratio on carp juvenile. Administration of probiotics at 15 ml/kg is the best treatment for a relative growth rate 2.96%, survival rate 100%, efficiency of food utilization 72.07%, and protein efficiency ratio 12.19%. In conclusions, probiotics mixed in feed are able to increase the digestibility of feed so that it supports the growth and survival rate of common carp.

Perception-based Indicator for Sustainability of Shrimp Culture in the Less Favorable Areas at Southern Coast of Yogyakarta Suadi Suadi; Hery Saksono; Bambang Triyatmo
Jurnal Perikanan Universitas Gadjah Mada Vol 21, No 2 (2019)
Publisher : Universitas Gadjah Mada

Shrimp farming has been introduced since the mid-1980s at the southern coast of Daerah Istimewa Yogyakarta (DIY). However, the industry was not well growing in the initial stage. The new shrimp development project also promoted in the early of 2000s, particularly in Jangkaran Village, Subdistrict of Temon, Kulon Progo District and Poncosari Village, Subdistrict of Srandakan, Bantul District, but many of shrimp farms fail because of shrimp diseases, lack of capital to recover and shrimp farming experiences. Recently, the shrimp culture industry experienced rapid expansion along the coast of the two districts. This study aimed to determine the profile and growing of shrimp farming at the southern coast of DIY and to identify the technical aspects, social, and economic indicators of sustainable shrimp culture in the less favorable areas. To identify the sustainability of current shrimp culture, the study develop four indicators consist of technical indicators (6 sub-indicators), economic indicators (9 sub-indicators), social indicators (7 sub-indicators), and environmental indicators (8 sub-indicator). The study was conducted during March to October 2014 by using a combination of literature study and survey at two selected villages: Jangkaran and Poncosari Villages. The total 82 respondents were interviewed; consist of shrimp farmers, coastal communities, community leaders, and local government. The study showed that the rapid growing of shrimp farming were caused by several factors, among others: (1) the existence of technological innovation in shrimp farming in the sandy soil areas, particularly the lower cost in the pond investment and the more easier of seawater collecting; (2) high price and market opportunities of the commodity; and (3) changes in the physical environment due to the threat of coastal erosion which damage the fisher livelihood, thus demanding adaptation strategies. Shrimp farmer in average managed 2,138 m2 and implemented intensive to super intensive cultivation technology, with an average stocking density of 144 shrimp/m2. Production per year in average reaches 25.9 ton/ha and generating revenue of IDR286.544.232 per year. The total cost of production is estimated at IDR210.590.175 per year, and generated a net profit of IDR75.954.057 per year. The perception based indicator of sustainability showed the environmental related issues were in average have a low value. Thus, environmental regulation of aquaculture is an important aspect to be considered in promoting sustainable development of shrimp farming at the southern coast of the province.

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