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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 6 Documents

Search results for , issue "Vol 20, No 1 (2018)" : 6 Documents clear

PENENTUAN JARAK TANAM OPTIMAL ANTAR RUMPUN BIBIT PADA METODE VERTIKULTUR RUMPUT LAUT Petrus R Pong-Masak; Nelly H Sarira
Jurnal Perikanan Universitas Gadjah Mada Vol 20, No 1 (2018)
Publisher : Universitas Gadjah Mada

Kappaphycus alvarezii cultivation by the verticulture method has been introduced since 2013. However, scientific studies on some technical aspects are still needed to improve the quality, quantity, and continuity of production and utilization of area in a maximum and productive manner. One of them is the planting distance between seed clumps. The purpose of this study was to determine the optimal planting distance between seed clumps on seaweed verticulture method. Seaweed was cultured using a 10x10 m2 floating raft containing 36 vertical nets of 5x2 m2/net. Seaweed seeds with an initial weight of 50 g were tied to a vertical net with a distance between knot on the verticulture net of 15 cm, 25 cm, and 35 cm. Seaweed cultivation was done for 3 cycles (1 cycle = 45 days) continuously in the cycle of planting season. The experimental units were prepared with Completely Randomized Design (RAL) with 3 replications. The results showed that daily growth rate (DGR) and carrageenan content of seaweed planted with a distance of 15 cm, 25 cm, and 35 cm between clumps were not significantly different (P>0.05). However, it is recommended to apply 25 cm distance between seed clumps in the verticulture method.

MAKANAN DAN KEBIASAAN MAKAN IKAN GEROT Pomadasys kaakan (CUVIER & VALENCIENNES,1830) DI TELUK PABEAN JAWA BARAT Chilmia Ayu Annisa; M Fadjar Raharjo; Ahmad Zahid; Charles P.H Simanjuntak; Aries Asriansyah; Reiza M Aditriawan
Jurnal Perikanan Universitas Gadjah Mada Vol 20, No 1 (2018)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jfs.31498

The Pabean Bay is an estuary area that inhabited by many fish species such as javelin grunt (Pomadasys kaakan Cuvier, 1830). The purposes of this study were to identify food item and determine the feeding habit of the javelin grunt in The Pabean Bay, West Java. Fishes were collected monthly from June to December 2016 using gill nets and trap nets. Observation food is in vitro by conducting an examination of the stomach and the intestines of an example and refer on the books of the identification by Carpenter and Niem. Analysis of fish diet includes index of relative importance, niche breadth, and niche overlap. Fishes were grouped into three groups based on the size length. The result showed that the javelin grunt was crustacivore. Generally, the diet of javelin grunt consists of Acetes sp., Penaeus sp., Portunus sp., Clupeid, Ambassid, Sciaenid, Gobiid, Sillaginid, and unidentified organisms. Penaeus sp. was the main food and could be found on each size of group in monthly observation. The proportion of index of relative importance value was changed in regard of length size groups of A (41-85 mm: 12.105), B (86-130 mm: 13.804), and C (131-175 mm: 7.561). The niche breadth of javelin fish was higher in the larger ones and a high diet overlap among size groups was found. According to prey item and feeding habit, the javelin grunt can be classified as benthic crustacean feeder.

Wind-Driven Coastal Upwelling in the Southern Coast of Yogyakarta Faizal Rachman; Ratih Ida Adharini; Riza Yuliratno Setiawan; Indun Dewi Puspita; Endy Triyannanto
Jurnal Perikanan Universitas Gadjah Mada Vol 20, No 1 (2018)
Publisher : Universitas Gadjah Mada

Satellite measurement provides synoptic view of sea surface wind and can be used to study variability of coastal upwelling. Here we analyzed data of 12 years of satellite-derived sea surface wind, sea surface temperature (SST), and sea surface chlorophyll-a (Chl-a) to examine the spatial and temporal distributions of coastal upwelling off the Yogyakarta waters. Results show that upwelling occurs during the Southeast Monsoon (SEM) season. During this season, the Yogyakarta waters are dominated by strong wind speed (~7 m/s) and SST cooling (25 °C). Whereas during the Northwest Monsoon (NWM) season the low wind speed (<4 m/s) no longer favor upwelling and SST cooling. We suggest that as the Yogyakarta coastline is oriented east-west, northwesterly winds result in downwelling condition at the coast, while southeasterly winds lead to the offshore Ekman transport of surface water and subsequent upwelling.

Restorasi Ekosistem Mangrove Desa Pesisir Berbasis Co-Management Rudianto Rudianto
Jurnal Perikanan Universitas Gadjah Mada Vol 20, No 1 (2018)
Publisher : Universitas Gadjah Mada

Tujuan penelitian adalah untuk menyusun urutan restorasi ekosistem mangrove desa pesisir guna mengatasi kerusakan lingkungan pesisir yang telah mengalami kerusakan akibat perubahan fungsi lahan. Pengumpulan data dilakukan dengan menggunakan kuisioner dan wawancara kepada pemangku kepentingan. Responden berasal dari Kabupaten Malang dan Kabupaten Gresik masing-masing terdiri dari masyarakat pesisir sebanyak 30 orang, Bappeda 2 orang, Dinas Kelautan dan Perikanan 2 orang, Dinas Kehutanan 2 orang, pemerintah kecamatan 2 orang, pemerintah desa 5 orang, dan swasta 6 orang. Waktu penelitian dilaksanakan selama tiga tahun mulai dari tahun 2013 sampai tahun 2016 dengan lokasi di kabupaten Gresik dan Kabupaten Malang. Analisis data dilakukan dengan metode Partial Least Square dan Analytical Hierarchy Process untuk mengetahui urutan prioritas penanganan restorasi ekosistem pesisir. Selain itu dilakukan analisis SWOT untuk mengetahui kapasitas kelembagaan desa dan yang akan bertanggung jawab melakukan restorasi ekosistem pesisir. Hasil penelitian diperoleh urutan pioritas utama penanganan kerusakan ekosistem pesisir adalah hutan mangrove, kedua adalah terumbu karang, ketiga adalah kawasan estuary, dan keempat adalah kawasan padang lamun. Institusi yang bertanggung jawab untuk menangani tingkat kerusakan ekosistem pesisir adalah pemerintah desa yang didukung oleh Satuan Kerja Perangkat Daerah (SKPD) di tingkat kabupaten. Di samping itu peran pemerintah, swasta dan masyarakat menjadi kunci sukses berhasilnya pelaksanaan restorasi. Petunjuk teknis pelaksanaan restorasi ekosistem pesisir berbasis co-management sangat diperlukan untuk melakukan restorasi ekosistem pesisir.

Application of Probiotic and Fermented Feed in the Nursery of Anguilla bicolor Agoes Soeprijanto; Guntur Guntur; Muhammad Fakhri
Jurnal Perikanan Universitas Gadjah Mada Vol 20, No 1 (2018)
Publisher : Universitas Gadjah Mada

The Application of Response Surface Methodology (RSM) on the Optimization of Catfish Bone Calcium Extraction Susana Endah Ratnawati; Nurfitri Ekantari; Rizky Wana Pradipta; B L Paramita
Jurnal Perikanan Universitas Gadjah Mada Vol 20, No 1 (2018)
Publisher : Universitas Gadjah Mada

This study was designed to determine the optimum conditions on catfish bone calcium extraction through Response Surface Methodology (RSM) which used factorial design and 13 treatments. Tests were used to know the influence of independent variables (solvents concentrations and treatment time) on the calcium content of bone flour. As a result, linear models were used as response prediction. Maximum response was obtained by calcium extraction using 5% NaOH during 30 minutes or 11.64% HCl within 58 minutes. It is shown that calcium content were 15.74-17.46% with more than 87.5% accuracy level. Calcium extraction using 5% NaOH during 30 minutes produced flour which has Ca/P ratio 3:1, maximum yield and whiteness level. Low protein and moisture content might result in the long shelf life of catfish bone flour.

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