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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 6 Documents
 1 
Search results for , issue "Vol 18, No 1 (2016)" : 6 Documents clear
PERTUMBUHAN KEPITING BAKAU Scylla olivacea DENGAN RASIO JANTAN-BETINA BERBEDA YANG DIPELIHARA PADA KAWASAN MANGROVE Muhammad Yusri Karim; Hasni Y. Azis; Muslimin Muslimin
Jurnal Perikanan Universitas Gadjah Mada Vol 18, No 1 (2016)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jfs.12593

Abstract

Budidaya kepiting bakau untuk penggemukan potensial untuk dikembangkan pada kawasan mangrove. Penelitian ini bertujuan untuk menentukan rasio jantan dan betina yang tepat pada budidaya penggemukan kepiting bakau (Scylla olivacea) yang dipelihara pada kawasan mangrove. Penelitian dilaksanakan di kawasan mangrove Kabupaten Pangkep, Propinsi Sulawesi Selatan. Hewan uji yang digunakan adalah kepiting bakau (S. olivacea) jantan dan betina berukuran bobot 250 ± 10 g yang ditebar dengan kepadatan 10 ekor/kurungan. Wadah yang digunakan adalah kurungan bambu berukuran panjang, lebar, dan tinggi masing-masing 1,0 x 1,0 x 1,0 m3 yang ditempatkan di kawasan mangrove. Pakan yang digunakan adalah ikan-ikan rucah dosis 10% dari biomassa kepiting dengan frekuensi pemberian pakan 2 kali sehari yakni pagi dan sore hari sebesar  30% dan 70%. Penelitian menggunakan rancangan acak lengkap (RAL) yang terdiri atas 4 perlakuan dan 3 ulangan. Sebagai perlakuan adalah rasio kepiting jantan dan betina, yaitu: 7:3, 6:4, 5:5, 4:6 dan 3:7 ekor/kurungan. Hasil analisis ragam memperlihatkan bahwa rasio jantan dan betina tidak berpengaruh nyata (p>0,05) pada sintasan kepiting, akan tetapi berpengaruh sangat nyata (p<0,01) pada pertumbuhan mutlak dan laju pertumbuhan harian kepiting bakau (S. olivacea). Sintasan yang dihasilkan berkisar 93,33-100%, pertumbuhan mutlak dan laju pertumbuhan harian kepiting tertinggi dihasilkan pada rasio jantan dan betina 7:3 dan 6:4 ekor/kurungan yakni 56,99 g dan 1,35%; 56,25 g dan 1,36%/hari sedangkan terendah pada rasio 3:7 ekor/kurungan yakni 28,97 g dan 0,73%/hari. 
PENGARUH SIMULASI TRANSPORTASI KAPAL PADA KERENTANAN KERANG HIJAU Perna viridis TERHADAP HYPOSALINITY Yasser Ahmed; Dian Respati Widianari
Jurnal Perikanan Universitas Gadjah Mada Vol 18, No 1 (2016)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jfs.17746

Abstract

Introduced species are species which exceed their natural distribution limits (native range) by a certain mode of introduction (vector). Natural movements are responsible to a limited extent. Introduction of a species could influence the susceptibility of a species to environmental stress no matter if introduced purposely or un purposely. Introduction of species could happen by natural movement i.e. organism can movement influenced by current and some organism can migrate to one area to another area; and human activity either purposely i.e. aquarium trade, aquaculture or un purposely such as accidentally through fouling on ship hulls. However, a dominant vector which has large contribution on species introduction is transported by ship hulls and ballast water tanks. Furthermore, the objective of this experiment is to investigate whether the organism can increase their tolerance during transport. The experimental design to mimicking transport condition in short term lab experiment and compared pre-stress group and non-stress group on the second stress. Afterward, looking forward the survival of the organism. Chosen of Green Mussels (P. viridis) from Muara Kamal, Jakarta Bay, and hyposaline stress. The response variable these experiments are survival and byssus. The results of this study showed that the group of pre-stress and non-stress group was no difference in the simulation of transport for survival. Byssus thread increase when recovery long enough and decrease when getting double stress. 
PENERAPAN TEKNOLOGI AKUSTIK PADA PERIKANAN BAGAN PERAHU Muhammad Kurnia; Sudirman Sudirman; Alfa Nelwan
Jurnal Perikanan Universitas Gadjah Mada Vol 18, No 1 (2016)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jfs.10393

Abstract

Acoustic technology for fisheries is one of technologies with the advantages to detect marine resources including estimating density and the presence of fish and relatively more accurate than conventional methods. The present study aims to assess the effectiveness of the operation of the lift-net with hydroacoustic technology in an effort to increase the productivity of the fisherman of boat liftnet. The study was conducted on fishing activity of boat liftnet in the Makassar Strait from April to May 2015 by utilizing the tools of acoustic technology in the operation of the boat liftnet. The analysis method is based on the productivity of the boat liftnet. The results showed that the productivity of fishing gear which is operated by using the tools of fisheries acoustic were improved compared with the fishing effort without acoustic tools. This result is expected to be a reference to research on the use of acoustic technology in a variety of fishing gear and as reference to research the use of science and technology in support of sustainable small-scale fishing effort. 
KARAKTERISTIK PERTUMBUHAN Tetraselmis sp. DAN Nannochloropsis sp. Muhammad Fakhri; Nasrullah B. Arifin
Jurnal Perikanan Universitas Gadjah Mada Vol 18, No 1 (2016)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jfs.10749

Abstract

Pemantauan pertumbuhan mikroalga (Tetraselmis sp. dan Nannochloropsis sp.) merupakan salah satu faktor penting dalam budidaya ikan dan udang. Tujuan penelitian ini adalah untuk mengetahui karakteristik pertumbuhan Tetraselmis sp. dan Nannochloropsis sp. dengan mengukur kerapatan optik menggunakan metode spektrofotometri. Penyerapan 600 nm digunakan untuk kedua spesies. Hasil penelitian menunjukkan bahwa pertumbuhan maksimum dicapai pada hari ke 6 untuk kedua mikroalga dengan nilai OD masing-masing 1,734 ± 0,013 dan 1,329 ± 0,002 untuk Tetraselmis sp. dan Nannochloropsis sp.. Tetraselmis sp. memiliki tingkat pertumbuhan maksimum 0,74/hari dan waktu penggandaan 22,43 jam sedangkan Nannochloropsis sp. memiliki tingkat pertumbuhan maksimum 0,86/hari dan waktu penggandaan 19,25 jam. Penelitian ini menunjukkan bahwa absorbansi 600 nm cocok untuk mengetahui pertumbuhan mikroalga hijau dan metode spektrofotometri yang dapat digunakan secara efisien untuk memantau pertumbuhan mikroalga. 
EFISIENSI DAN ENERGETIKA PENETASAN KISTA ARTEMIA (Artemia salina) PADA SALINITAS MEDIA YANG BERBEDA Endah Heryastuti; Sutrisno Anggoro; Subandiyono Subandiyono
Jurnal Perikanan Universitas Gadjah Mada Vol 18, No 1 (2016)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jfs.25624

Abstract

Hatching rate of Artemia salina cysts in the hatching process is variable due to many factors. Osmolarity of the medium is one of the factors determining hatching process of A. salina cysts. The purpose of this study is to assess the hatching process of A. salina cysts in a various osmotic condition on the hatching energetics efficiency and rate. The experimental design used was a 2 x 5 factorial completely randomized design. The first factor is an addition of chlorine (non-decapsulation and decapsulation) and the second factor is osmolarity of medium (640.27; 787.02; 901.76; 1080.51 and 1227.25 mOsm.L-1H2O). The results showed that hatching of A. salina cyst on various osmotic condition has significantly differed the hatching rate. No significant differences in the hatching energetics efficiency were obtained from each experimental groups. Media with osmolarity level of iso-osmotic to hyperosmotic (901.76-1227,25 mOsm.L-1H2O) provides a high hatching rate. Energetics efficiency of artemia cysts hatching is ranged from 640.27 to 1227.25 mOsm.L-1H2O in both hypoosmotic, isosmotic and hyperosmotic media. 
Susceptibility of Tiger Shrimp (Panaeus monodon) against Vibrio harveyi on various Molt Stage and Osmolarity Gina Saptiani; Catur A Pebrianto; Agustina Agustina; Esti H Hardi
Jurnal Perikanan Universitas Gadjah Mada Vol 18, No 1 (2016)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (470.111 KB) | DOI: 10.22146/jfs.10327

Abstract

Vibrio harveyi causes disease of tiger shrimp (Penaeus monodon) aquaculture in East Kalimantan. This research aimed to investigate the susceptibility of tiger shrimp on various molt stage and osmolarity, and determine the salinity (osmolarity) of water that can reduce the risk of V. harveyi attack. Shrimp age of 1.5 months was maintained in 4 aquariums with salinity 29.72 ‰, 26.07 ‰, 22.35 ‰ and 17.79 ‰, then challenged with V. harveyi. After 7 and 14 days, osmolarity of haemolimph was observed with automatic osmometer and Digital Roebling Osmometer. The susceptibility of tiger shrimp to V. harveyi was evaluated based on clinical symptoms, pathological anatomy of shrimp and density of V. harveyi (TPC) in the hepatopancreas. Osmolarities of shrimp haemolymph at premolt, postmolt, and intermolt stage were 575.30-812.60; 534.00-788.80, and 566.20-795.60 mOsm/l H2O, respectively. The lowest bacterial content in the premolt stage was maintained at a salinity 22.35 ‰, and the highest one was obtained in postmolt stage at 29.72 ‰. The molting and postmolt stage were the most susceptible to V. harveyi attacks. The results suggested that the shrimp maintained at 22.35 ‰ salinity was less susceptible to V. harveyi. 

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