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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 8 Documents

Search results for , issue "Vol 20, No 2 (2018)" : 8 Documents clear

Rehabilitation of Mangrove Ecosystem Through Community-Based Project and the Current Economic Value: A Case Study of Rehabilitation Project in Lubuk Kertang Village, Langkat Regency, North Sumatera Natasha Dinda; Suadi Suadi; Latif Sahubawa
Jurnal Perikanan Universitas Gadjah Mada Vol 20, No 2 (2018)
Publisher : Universitas Gadjah Mada

Mangrove ecosystem plays an important role for socio-economic and environmental services. However, the rapid expansion of agricultural and industrial plantation activities challenged the sustainability of such ecosystem in Lubuk Kertang Village. This research aims to describe the potential of community-based to rehabilitate the degraded mangrove ecosystem and the economic benefit of such project for Lubuk Kertang villagers. The research was conducted using census methods for all respondents, including fishermen, handicraft makers, tourists, and the manager of the eco-tourism activity. The study showed that the successful of community on replanting the mangrove on mangrove ecosystem led by various factors, including the high willingness of community to participate on rehabilitation project, clear physical boundaries and rule enforcement, effective monitoring system and better conflict resolution mechanism. The total economic value in the mangrove area is Rp 1.057.343.654/year, comprising of Rp 601.077.437/year direct use value, Rp 395.786.267/year indirect value, Rp 22.279.950/year option use value, and Rp 38.200.000 existence value. The society based mangrove management has preserved the benefit potential value of not to endanger the change of mangrove ecosystem.

Preferences of Giant Gouramy (Osphronemus gouramy, Lac, 1801.), Walking Catfish (Clarias sp.) and Red Nile (Oreochromis sp.) on Natural Feed in Fish Culture Dea Nafila; Rustadi Rustadi; Djumanto Djumanto
Jurnal Perikanan Universitas Gadjah Mada Vol 20, No 2 (2018)
Publisher : Universitas Gadjah Mada

The aim of this study was to determine the preference for plankton as natural feed by giant gourami, walking catfish, and red nile on intensive aquaculture system. The study was designed using Completely Randomized Design (RAL), with two replications. Each fish was kept in six concrete tanks with dimension 2x2x1 m³ and 60 cm water level. Water source were from wells. Commercial pellet feed was given in three times daily ad libitum. Water samples were filtered and two individual fish were collected for plankton samples from pond water and alimentary canal, respectively, every two week, simultaneously with water quality measurements. Plankton samples were preserved using 5% formaldehyde and was observed under a compound light microscope with 100x magnification. The amount of plankton in the alimentary canal was converted to volume. Data were analyzed descriptively. The result showed that the volume contents proportion of plankton in the alimentary canal was less than 1%. The volume of plankton proportion in the alimentary canal of red nile were found the most than other fish. Each fish had the same preference of plankton of Lepocinclis and Scenedesmus, but different from other species of plankton. The plankton that utilized by giant gouramy were Crucigenia, Diadesmis and Navicula, whereas walking catfish was Pediastrum, and red nile was Microcystis. The plankton that preferred by giant gouramy were Crucigenia, Oscillatoria, Splirullina, and Synedra, walking catfish was Navicula, while red nile were Chrysamoeba and Tintinnidium.

The Capability of Cinnamon as an Off-Flavor Masking Agent for Spirulina platensis enriched Food Product Wahdan Fitriya; Khusnul Alfionita
Jurnal Perikanan Universitas Gadjah Mada Vol 20, No 2 (2018)
Publisher : Universitas Gadjah Mada

The purpose of this research was to know the effectiveness and the description of aroma of cookies, flakes, and dried noodles fortified with biomass of Spirulina platensis microalgae and cinnamon powder. Fortification was done to increase the nutritional value while the addition of cinnamon powder was done as an aroma masking ingredient to reduce off-flavor of the product. The observations included hedonic test using 60 panelists to find out the best concentration of cinnamon powder additions favored by panelists, followed by quantitative descriptive analysis (QDA) using trained panelists to know the aroma description of the product. The cinnamon powder added to each product was 2.5; 5; 7.5; and 10%. The results showed the concentration of cinnamon for cookies, flakes, and spirulina drieds noodles were 10; 2.5; and 2.5 %, respectively. The selected product was then tested by QDA and generated respectively 13; 12; and 10 perceptions of aroma, while dominant perceptions emerging were cinnamon-like, sunflower seed-like, sand ginger-like, and caramel-like.

The 16S and COI Mitochondrial DNA Nucleotide Composition of Stripped Snakehead (Channa striata Bloch,1793) from Lake Sentani, Jayapura, Papua Christine Bawaeda Sitandung Kombong; Tuty Arisuryanti
Jurnal Perikanan Universitas Gadjah Mada Vol 20, No 2 (2018)
Publisher : Universitas Gadjah Mada

Stripped snakehead (Channa striata Bloch,1793) has potency to be developed in Indonesia due to high nutritional value including omega 3 which is useful for children growth. However, study on composition of mitochondrial DNA nucleotide as a part of study on genetic characterization of stripped snakehead fish in Indonesia is poorlyunderstood. Genetic characterization of stripped snakehead is important to obtain data information that can be applied for breeding and conservation program. Therefore, the objective of this study was to determine the 16S and COI mitochondrial DNA nucleotide of stripped snakehead collected from Lake Sentani, Jayapura, Papua. Method used in this research is PCR method using primer 16Sar and 16Sbr for 16S mitochondrial gene, and FishF2 and FishR2 for COI mitochondrial gene. The results showed that composition of 16S mtDNA nucleotide from 616 bp was T=21.92%, C=25.49%, A=30.19%, dan G=22.40%, whereas composition of A+T=52.11% and G+C=47.89%. In addition, composition of COI mtDNA nucleotide from 705 bp was T=29.93%, C=28.65%, A=24.26%, and G=17.16% while composition of A+T=54.48% and G+C=45.52%. Data of 16S and COI mitochondrial DNA nucleotide composition of the stripped snakehead collected from Lake Sentani gained in this study are to be expected to complete genetic information of the fish species which is useful to improve breeding program of this fish species in the future.

Seaweed Selection to Supply Superior Seeds for Cultivation Nelly Hidayanti Sarira; Petrus Rani Pong-Masak
Jurnal Perikanan Universitas Gadjah Mada Vol 20, No 2 (2018)
Publisher : Universitas Gadjah Mada

Seaweed Kappaphycus alvarezii is a pre-eminent commodity in the field of marine and fisheries Indonesia which has been widely cultivated in coastal waters. Currently, the main problem faced by the cultivators is the limited stock of seeds, both in terms of quality and quantity. Selection is one method that is expected to increase the rate of seaweed growth quickly, cheap, easy, bulk, and sustainable.This study aims to determine the effect of selection on the growth of seaweed so that it can be done superior seed production for cultivation purposes. Seaweed cultivation was done in Kulu Village, Wori District, North Minahasa Regency, North Sulawesi by using long line method in April-June 2015. Selection is based on the daily growth rate parameter (DGR) and the selection method refers to the selection protocol that has been developed on K. alvarezii seaweed. Results showed that DGR of selection seedlings were higher (P <0.05) compared to controls, in which DGR of selection reached 5.87%/day, while DGR of control was 1.89%/day. From three seed production cycles (G-1 - G-3), the average DGR resulted from the selection was 5.53%/day and control 2.19%/day. Carrageenan content of selection result is relatively higher (47.66%) than control (31.28%) with mean for three cycle (G-1 - G-3) that is 43.55% for selection and 33.20% for control. Water quality (temperature, salinity, nitrate, phosphate) during the study is still within the appropriate range for seaweed growth. Therefore it is concluded that with the application of the method of seaweed selection can increase the daily growth rate and carrageenan content of seaweed K. alvarezii which directly affects the increase of production both in quantity and quality.

Distribution and Composition of Lobster Species Caught in Java Sea of East Java, Indonesia Arief Setyanto; Nabilla Artini Rachman; Eko Sulkhani Yulianto
Jurnal Perikanan Universitas Gadjah Mada Vol 20, No 2 (2018)
Publisher : Universitas Gadjah Mada

Lobster resources are abundant in Indonesia waters. Lobster’s catch production is known as an important fishery commodity. A lobster fishery is considered important fisheries within the Indonesia fishe ies management zone. So that, its management plan is needed to be developed. As a consequence, preliminary study on lobster distribution by its species proportion or composition in their catches by its fishing ground and fishing season (month) are important to mitigate the resources. The study was conducted in Java Sea of East Java to explore the lobster species distribution and composition. The Java Sea is laid within the Fisheries Management Zone of the Republic of Indonesia number 712. Lobster catch data were collected from 4 regions (landing bases) across East Java. They are Lamongan, Bawean, Tuban and Sumenep. The data was collected from December 2016 - March 2017. These regions are representing over all biogeography of marine ecology of East Java. Statistical test for homogeneity of composition/proportion of species of lobster by its regions or location and time/month were analyzed and tested statistically using one way Analysis of Variance (ANOVA). The results shows that the composition o lobster species in each regions or location in different time/month are different. There were our species o lobster identified. They are Panulirus ornatus, P. homarus, P. polyphagus, and P. Versicolor. P. ornatus found in those four locations. All 4 species are caught in Lamongan. there are no species of P. Homarus have been caught in Bawean. In Tuban there is 3 species of Panulirus ornatus, P. polyphagus, and P. homarus. While in Sumenep there are only two species which are P. ornatus and P. Versicolor. Panulirus polyphagus is dominant in Lamongan, Bawean, and Sumenep while P. homarus is in Tuban. Those four species were caught in the month of December, January, February and March with P. Polyphagus as a dominant catch.

Vulnerability Analysis of Sea Level Rise In The Southern Coast of Bawean Island Zainul Hidayah; Agus Romadhon; Yudha Witjarnoko
Jurnal Perikanan Universitas Gadjah Mada Vol 20, No 2 (2018)
Publisher : Universitas Gadjah Mada

Bawean island is one of numerous small islands in East Java. This island is famous for its natural resources and high level of environmental services. However in the last few years, effects of sea level rises on the island have been reported. Objective of this research was to identify and determine parameters that have significant impact on the vulnerability of the island due to sea level rise events. This research was conducted from July untill September 2017. The method used for this study was a combination of spatial analysis using remote sensing and Geographical Information System (GIS), field survey and interviews with local people. Vulnerability assesment was conducted for three parameters, namely Exposure, Sensitivity and Adaptive Capacity. The results showed that the vulnerability index in the southern part of the island is 3.381. It can be classified as low vulnerability.

The Effect of Chitosan in Feed on Growth, Survival Rate and Feed Utilization Efficiency of Nile Tilapia (Oreochromis niloticus) Rozi Rozi; Akhmad Taufiq Mukti; Syifania Hanifah Samara; Muhammad Browijoyo Santanumurti
Jurnal Perikanan Universitas Gadjah Mada Vol 20, No 2 (2018)
Publisher : Universitas Gadjah Mada

Chitosan is a functional polysaccharide that is capable of inducing various biological activities. This research aims to examine the effect of chitosan on growth and blood profile of tilapia fish. The method used in this research was experimental methods with completely randomized design (RAL) consisting of 4 treatments and 3 times. 120 Tilapia fish in 5-7 cm in range size were reared in aquarium at density of 10 fish/aquarium. Feedwere given at the additional dose of 10 ppt, 50 ppt, and 100 ppt chitosan. The observed variables were growth rate, survival rate, fish blood profile, water quality, feed utilization efficien . The results showed that the best chitosan treatment was at a dose of 100 ppt which produced FCR of 3.48 ± 2.25, AGP: 0.13 ± 0.03, SGR: 0.85 ± 0.84 and EPP: 28.70 ± 16,54.

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