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All Journal Jurnal Teknologi Perikanan dan Kelautan Jurnal Sumberdaya Hayati Jurnal Perikanan Terpadu
Zulfathri Randhi
Program Studi Perikanan Tangkap, Universitas Sulawesi Barat, Jl. Prof. Dr. Baharuddin Loa, S.H, Talumung, Majene, Sulawesi Barat 91412
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Education Environmental Science Immunology & microbiology Library & Information Science Social Sciences

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AKUSTIK DIBANDINGKAN DENGAN DENSITAS IKAN: KOMBINASI METODE AKTIF DAN PASIF Zulfathri Randi; Totok Hestirianoto; Sri Pujiyati
Jurnal Teknologi Perikanan dan Kelautan Vol 8 No 2 (2017): NOVEMBER 2017
Publisher : Fakultas Perikanan dan Ilmu Kelautan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (758.132 KB) | DOI: 10.24319/jtpk.8.187-198

Abstract

Fisheries acoustics has two main division namely active and passive acoustics. Various acoustic studies with active methods have been conducted to assess the relationship between acoustics with fish density, but combination both mactive and passive methods has never been done to the same fish aggregation. Combining these two methods is expected to deliver an information related to fish density and its trend with both active and passive methods. This study was conducted on tilapia (Oreochromis niloticus) in controlled condition of 50, 100, and 150 fish individuals with total length range of 10-13 cm. Active and passive acoustic data acquisition carried out for 15 minutes on floating net cage of 2 m × 2 m × 1.8 m in dimension using CruzPro PcFF-80 echosounder 200 kHz (active acoustics) and Dolphin EAR 100 hydrophones (passive acoustics). Active acoustic data is processed using Matlab R2013b to generate value of scattering volume (SV), while passive acoustic data is processed using Wavelab program to obtain the intensity of fish sound in frequency domain, then both are correlated to fish density. The results of SV measurements in fish amounted to 50, 100 and 150 individuals respectively were -45.898 dB, -45,887 dB and -45,888 dB, with the coefficient of determination (R2) reached 0.6583. There is an average decrease in SV in fish totaling 150 individuals suspected to occur due to shadowing effects, also due to small fish used. The highest and lowest intensity of fish sound of 50 fishes in frequency range 0-22 kHz were -28.306 dB and -64.582 dB, 100 fishes were -26.0793 dB and -64.5296 dB, 150 fishes were -28.5246 dB and -64.5679 dB.
Stok Karbon Organik Sedimen di Kawasan Ekosistem Mangrove Pesisir Kabupaten Kolaka Sulawesi Tenggara: Organic Carbon Stock in the Mangrove Ecosystem Area of Kolaka Coastal Line Southeast Sulawesi Fajar Hasidu; Maharani Maharani; Gaby Nanda Kharisma; Ramlah Saleh; Putri Grace Simamora; Sri Rezeki; Arif Prasetya; La Ode Muhamad Hazairin Nadia; Zulfathri Randhi; Hasan Eldin Adimu
Jurnal Sumberdaya Hayati Vol. 9 No. 3 (2023): 2023
Publisher : Departemen Biologi, Institut Pertanian Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/jsdh.9.3.104-108

Abstract

Mangrove ecosystem can absorb and store carbon stock in their biomass and sediment. This ecosystem plays an important role in the carbon cycle. This study aimed to analyze the C-organic content and organic carbon stock of sediment, also CO2 absorption. The sediment sampling was conducted in the Kolaka Coastal line mangroves using a Peat Auger for 1 m of sediment depth. Then the sediment was separated into four layers. Then the sediment samples were oven dried at 50°C for 1 week for sediment bulk density analysis (SBD). The analysis of the C-organic content of sediment was done by the LOI method. The estimation of sediment carbon stock using sediment C-organic data and SBD data. The results showed that the highest average of C-organic content was in station 3 (4.12±0.15%). In the othher hand, the highest average of SBD was in station 1 (0.67±0.02 g cm-3). Overall, the total of sediment C-organic stock in station 1 was higher than other station (233.67±11.90 Mg C ha-1). The total capacity of CO2 absorption by sediment in the station 1 was also higher than other station (856.77±37.66 Mg CO2 ha-1). The sediment C-organic stock was influenced by C-organic content and SBD value.
Assessment of Lift Net Catch Productivity in Tonyaman Village, Polewali Mandar, West Sulawesi Etika Ariyanti Hidayat; Eka Erliana; Ady Jufri; Muhammad Nur Ihsan; Zulfathri Randhi
Jurnal Perikanan Terpadu Vol 7, No 1 (2026): Jurnal Perikanan Terpadu Volume 7 Nomor 1
Publisher : Universitas Teuku Umar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35308/jpterpadu.v7i1.11998

Abstract

Lift net productivity is a key indicator of fishing gear and operational efficiency in Tonyaman. This study aimed to analyze the productivity and species composition of fish catches from two lift net units using experimental fishing, with each unit conducting 15 trips. Data included catch volume per trip and species identification. Results showed fluctuating productivity: Lift net 1 initially declined (1–2 kg/trip) but increased to 6–7 kg/trip, while Lift net 2 showed a significant rise from day 9, reaching up to 15 kg/trip. Species composition varied, with 12 species in net 1 and 10 in net 2. Average productivity was 5.097 kg/trip for net 1 and 6.616 kg/trip for net 2. Catch composition revealed a higher proportion of target species in net 2. To enhance efficiency and yield, it is recommended that fishers adopt fishing technologies and consider seasonal patterns in their operations
Co-Authors Ady Jufri Arif Prasetya Eka Erliana Etika Ariyanti Hidayat Gaby Nanda Kharisma Hasan Eldin Adimu Hasidu, La Ode Abdul Fajar Hestirianoto, Totok La Ode Muhamad Hazairin Nadia Maharani Muhammad Nur Ihsan Putri Grace Simamora Ramlah Saleh Sri Pujiyati Sri Rezeki