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Densitas Schooling Ikan Pelagis pada Musim Timur Menggunakan Metode Hidroakustik di Perairan Selat Bangka Fauziyah, Fauziyah; Ningsih E.N, Ningsih E.N; Wijopriono, Wijopriono
Jurnal Penelitian Sains Vol 13, No 2 (2010)
Publisher : Faculty of Mathtmatics and Natural Sciences

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Abstract

Acoustic survey has been done in July 19th - 24th 2008 at Bangka Strait. The aim of this study was to analysis pelagic fish school migration during northeast monsoon using split beam scientific echosounder. During northeast monsoon, pelagic fish at Bangka Strait was dominated small pelagis fish based on Pasaribu, 1998. This study reports analyses of data from 53 pelagic fish schools and dominated with Target Strength (-50) - (-47) dB. All schools were recorded at depths 5-15 m. The fish also formed the school during daytime. Density of pelagic fish school was 0-300 ind/1000m3 with dominated between 101-300 ind/1000m3. In general, the swimming directions of pelagic fish school migrate to south until south east to continent (Java Sea). 
FISHERY RESOURCES IN THE WEST COAST OF ACEH AFTER TSUNAMI: RESULTS OF THE BOTTOM TRAWL SURVEYS Wijopriono, Wijopriono; Wedjatmiko, Wedjatmiko; Suprapto, Suprapto
Indonesian Fisheries Research Journal Vol 13, No 2 (2007): (December 2007)
Publisher : Pusat Penelitian dan Pengembangan Perikanan, Badan Penelitian dan Pengembangan Kelautan da

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (6169.552 KB) | DOI: 10.15578/ifrj.13.2.2007.55-61

Abstract

Investigation on fishery resources in the west coast of Aceh Province was carried out during July until August 2005 and August until September 2006. One of the objectives of the investigation was to determine the state of demersai stock after the area severely hit by tsunami in December 2004.
SPATIAL DISTRIBUTION AND SHOALING BEHAVIOUR OF FISHERY RESOURCES lN THE WATERS OFF WESTERN COAST OF ACEH: PRELIMINARY RESULTS FROM THE POST TSUNAMI EXPEDITION 2OO5 Wijopriono, Wijopriono; Natsir, Mohamad; Slotte, Aril; Priatna, Asep
Indonesian Fisheries Research Journal Vol 12, No 1 (2006): (June 2006)
Publisher : Pusat Penelitian dan Pengembangan Perikanan, Badan Penelitian dan Pengembangan Kelautan da

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (4681.91 KB) | DOI: 10.15578/ifrj.12.1.2006.15-25

Abstract

Acoustic investigation, which is one of the programmes of the Post Tsunami Expedition, was done in Aceh waters during 24 July to 14 August 2005. Research vessel Bawal Putih I and Baruna Jaya Vlll were used for the survey.
ACOUSTIC CLASSIFICATION OF FRESHWATER FISH SPECIES USING ARTIFICIAL NEURAL NETWORK: EVALUATION OF THE MODEL PERFORMANCE Fahmi, Zulkarnaen; Wijopriono, Wijopriono
Indonesian Fisheries Research Journal Vol 19, No 1 (2013): (June 2013)
Publisher : Pusat Penelitian dan Pengembangan Perikanan, Badan Penelitian dan Pengembangan Kelautan da

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2647.724 KB) | DOI: 10.15578/ifrj.19.1.2013.19-24

Abstract

Hydroacoustic techniques are a valuable tool for the stock assessments of many fish species. Nonetheless, such techniques are limited by problems of species identification. Several methods and techniques have been used in addressing the problem of acoustic identification species and one of them is Artificial Neural Networks (ANNs). In this paper, Back propagation (BP) and Multi Layer Perceptron (MLP) of the Artificial Neural Network were used to classify carp (Cyprinus carpio), tilapia (Oreochromis niloticus), and catfish (Pangasius hypothalmus). Classification was done using a set of descriptors extracted from the acoustic data records, i.e. Volume Back scattering (Sv), Target Strength (TS), Area Back scattering Strength, Skewness, Kurtosis, Depth, Height and Relative altitude. The results showed that the Multi Layer Perceptron approach performed better than the Back propagation. The classification rates was 85.7% with the multi layer perceptron (MLP) compared to 84.8% with back propagation (BP) ANN.
DESCRIPTION OF THE SMALL SEINER FLEET IN THE JAVA SEA J.M, Ecoutin; Atmaja, Suherman Banon; M, Pottier; Wijopriono, Wijopriono
Indonesian Fisheries Research Journal Vol 3, No 1 (1997): (1997)
Publisher : Pusat Penelitian dan Pengembangan Perikanan, Badan Penelitian dan Pengembangan Kelautan da

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (9930.843 KB) | DOI: 10.15578/ifrj.3.1.1997.47-63

Abstract

Several census of fhe fishing units using mini seine nets were carried out in 1994 and1995. The first census, in October 1994, set the inquiry protocol.
MODEL PRODUKSI DAN LAJU TANGKAP KAPAL BOUKE AMI YANG BERBASIS DI PPN KEJAWANAN, CIREBON JAWA BARAT Triharyuni, Setya; Wijopriono, Wijopriono; Prasetyo, Andhika Prima; Puspasari, Reny
Jurnal Penelitian Perikanan Indonesia Vol 18, No 3 (2012): (September 2012)
Publisher : Pusat Penelitian dan Pengembangan Perikanan, Badan Penelitian dan Pengembangan Kelautan da

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15578/jppi.18.3.2012.135-143

Abstract

Jaring bouke ami merupakan alat tangkap yang diklasifikasikan sebagai jaring angkat (lift Net) dengan target tangkapan cumi-cumi. Cirebon merupakan salah satu tempat pendaratan ikan yang didominasi kapal bouke ami. Penelitian model produksi dan laju tangkap kapal bouke ami yang berbasis di PPN Kejawanan Cirebon dilakukan pada bulan Juni dan Agustus 2011. Tujuan penelitian adalah untuk mengetahui hasil tangkapan, model dan faktor-faktor yang mempengaruhi hasil tangkapan serta laju tangkap kapal bouke ami. Analisis model produksi yang digunakan adalah model Cobb Douglas. Data yang dikumpulkan meliputi data spesifikasi kapal, produksi per jenis ikan, jumlah kapal dan total tangkapan. Hasil penelitian menunjukkan bahwa hasil tangkapan utama dari jaring bouke ami adalah cumi-cumi, dengan komposisi hasil tangkapan rata-rata sebesar 60,51% dari total hasil tangkapan. Analisis model produksi menunjukkan bahwa variable ukuran kapal (GT) berpengaruh secara signifikan (P<0,1) terhadap hasil tangkapan dengan persamaan  (Fhitung = 2,111> F tabel=2,073) dan nilai  koefisien determinasi  (R2)  sebesar  0,53. Rata-rata laju tangkap jaring bouke ami tahun 2006-2010 adalah sebesar 6,72 ton/trip dengan laju tangkap cumi-cumi sebesar 3.907,5 kg/trip  atau sebesar 58,5% dari total laju tangkap. Stick held dip net, classified as lift net is one of fishing gears used to catch squid as target species. Cirebon is one of fishing port for stick held dip net. The number of stick held dip net landed at Kejawanan Fishing Port is dominant. A study aimed to reveal information about catch, production factors that affecting the catch and  catch  rate  of  stick held dip net has been conducted in June and August 2011. Vessel specification, production by species and the number of vessel data were collected. Production model of the stick held dip net was analysed using Cobb Douglas model. The results showed that catch composition was dominated by squids with an average catch of squid reached up to 60,51% of the total catch. The model production showed that the variable size of the vessel (GT) was significantly affected the catch (P <0,1) following the equation   (F value=2,111> F table =2,073, R2=0,53. An average catch rate of stick held dip net in the period 2006-2010 was 6,72 ton/trip with an average catch rate of squid was 3.907,5 kg/trip or 58,5% from the total catch rate. 
ANALIZING DENSITY AND ENVIRONMENTAL FACTORS OF THE JAVA SEA PELAGIC FISH USING CATCH, REMOTE SENSING, AND HYDRO ACOUSTIC DATA Wijopriono, Wijopriono
Indonesian Fisheries Research Journal Vol 13, No 2 (2007): (December 2007)
Publisher : Pusat Penelitian dan Pengembangan Perikanan, Badan Penelitian dan Pengembangan Kelautan da

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (13067.101 KB) | DOI: 10.15578/ifrj.13.2.2007.63-80

Abstract

The relationship between the variations in density of pelagic fish in the Java Sea and a suite of variables describing the environment was studied. The indicator of density (local fish abundance) used were catch per unit of effort, obtained from 1,198 catches made by commercial fishing during the 5 year period (1998 until 2002), and number of fish per unit of area from acoustic investigation made in 2002.
FISHERY RESOURCES AND ECOLOGY OF TOBA LAKE Wijopriono, Wijopriono; Purnomo, Kunto; Kartamihardja, Endi Setiadi; Fahmi, Zulkarnaen
Indonesian Fisheries Research Journal Vol 16, No 1 (2010): (June 2010)
Publisher : Pusat Penelitian dan Pengembangan Perikanan, Badan Penelitian dan Pengembangan Kelautan da

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (5621.392 KB) | DOI: 10.15578/ifrj.16.1.2010.7-14

Abstract

Investigatiorr of stock and distribution of fishery resources was done in Toba Lake in October 2005, at the time when the wet season prevailed, using acoustic method. Split-beam echosounder SIMRAD Ey-60 operated at frequency ol iZO KHz and 0.512 ms pulse duration was used.
SPATIO TEMPORAL DISTRIBUTION OF SMALL PELAGIC FISH IN THE JAVA SEA Wijopriono, Wijopriono
Indonesian Fisheries Research Journal Vol 14, No 1 (2008): (June 2008)
Publisher : Pusat Penelitian dan Pengembangan Perikanan, Badan Penelitian dan Pengembangan Kelautan da

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (12607.347 KB) | DOI: 10.15578/ifrj.14.1.2008.21-35

Abstract

Time spent in seeking fish schools and potential fishing areas is the main source of fuel consumption, and it is a significant factor in raising the cost of fishing operation. Therefore, knowledge of the distribution pattern lnd aggregations of commercial fish in space and time is of considerable financial value to the fishers anAlisnlng industry because it will assist them to reduce the time and fuel consumption of the boats in locating the rich fishing grounds.
POPULASIIKAN DEMERSAL Dl PERAIRAN ARU, PROPINSI MALUKU Wedjatmiko, Wedjatmiko; Wijopriono, Wijopriono; Suprapto, Suprapto
Jurnal Penelitian Perikanan Indonesia Vol 15, No 3 (2009): (September 2009)
Publisher : Pusat Penelitian dan Pengembangan Perikanan, Badan Penelitian dan Pengembangan Kelautan da

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15578/jppi.15.3.2009.229-237

Abstract

Penelitian ini dilakukan pada tanggal 4-9 Nopember 2006, menggunakan alat tangkap trawl yang dioperasikan dengan KR. BawalPutih, pada 35 stasiun pengamatan. Perairan Aru bagian dariperairan Arafura, merupakan salah satu perairan Indonesia yang potensial untuk penangkapan ikan demersal maupun udang. Penelitian ini bertujuan untuk mengetahui komposisi, Jaju tangkap, kepadatan stok,_dan biomassa ikan demersal yang tertangkap di perairan Aru (Propinsi Maluku). Hasil penelitian mennunjukkan bahwa hasil tangkapan ikan demersal mencapai 6.063,44 kg atau 67,06%  dari total hasil tangkapan trawl,  yang terdiri atas 132 spesies dari 56 famili. lkan yang dominan tertangkap adalah famili Leiognathidae (1.604,4 kg atau 26,4%), Apogonidae (658,8 kg atau 10,9%), dan Mullidae (639,1 kg atau 10,6%). Rata-rata laju tangkap ikan demersal173,2 kg per jam, dan dugaan kepadatan stok 4,4±0,2 ton km·2,  serta dugaan biomassa ikan demersal 193.975±257 ton. The research was carried out during November 41 2006, using bottom trawl (RV. Bawal Putih). Data were collected from 35 selected stations through bottom trawl survey. Aru waters are part of Arafura waters, that area potential for demersal fish and shrimps in Indonesia. The aim of this research is to find out the catch composition, catch rate, stock density, and biomass of demersal fish. The results show that the catch composition of demersal fish was 6,063.44 kg (67.06% from total catch), consisted of  132 species and 56 families.  Tl1ere were  3 family of demersal  fish mostly caught,  namely Leiognathidae (1,604.4 kg or 26.4%), Apogonidae (658,8 kg or 10.9%), Mullidae (639.1 kg or 10.6%), respectively with the average of catch rate was 173.2 kg per hour. The average stock density of demersal fish was estimated 4.4±0.2 ton km·2 ton km2  Whilst the total biomass of demersal fish was estimated 193,975±257 ton.