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All Journal Jurnal Natur Indonesia Jurnal Perikanan Jurnal Natur Indonesia
Laily Fitriani Mulyani
Aquaculture Study Programme, Faculty of Agriculture, University of Mataram
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Earth & Planetary Sciences Physics

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PENINGKATAN KELARUTAN KALSIUM MELALUI PENAMBAHAN DAUN KETAPANG Terminalia catappa PADA MEDIA AIR TAWAR BUDIDAYA UDANG VANNAMEI Litopennaeus vannamei Andre Rachmat Scabra; Muhammad Marzuki; Nunik Cokrowati; Bagus Dwi Hari Setyono; Laily Fitriani Mulyani
Jurnal Perikanan Unram Vol 11 No 1 (2021): JURNAL PERIKANAN
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jp.v11i1.250

Abstract

Litopenaeus vannamei is a high-economic fishery commodity that has euryhaline properties, which is tolerant of a wide range of salinity values ??(2 – 40 ppt). The euryhaline of vannamei shrimp are still not well optimized. The purpose of this study was to determine the appropriate dose of ketapang leaf addition to increase mineral solubility in freshwater vannamei shrimp culture medium. The results of this study are expected to be useful as information for vannamei shrimp cultivators in freshwater media about technology for meeting mineral levels in the media so as to maximize production value. This study used a completely randomized design (CRD) method which consisted of 4 treatments and 3 replications. The treatment applied was the addition of ketapang leaves with different doses to increase the solubility of calcium carbonate (CaCO3) in cultivation media, namely A. Ketapang leaves (DK) 0 ppt + CaCO3 50 ppm; B. DK 120 ppm + CaCO3 50 ppm; C. DK 240 ppm + CaCO3 50 ppm; D. DK 360 ppm + CaCO3 50 ppm. The results showed that the appropriate dose of ketapang leaves that could increase mineral solubility in freshwater vannamei shrimp culture media was 360 ppm (treatment D). At this dose, the value of the specific weight growth rate of vannamei shrimp can increase, which is 0.76%/day. Treatment A is a control treatment that gives the lowest value for the specific weight growth value, which is 0.40 %/day.
Utilization and Management of Demersal Fisheries in West Sumbawa Regency, West Nusa Tenggara Province Nunik Cokrowati; Haerul Jibriel; Baiq Raihanun; Erwansyah Erwansyah; Arzianingsih Arzianingsih; Nanda Diniarti; Rinto Basuki; Sri Ahdyanti; Budianto Budianto; Muhammad Junaidi; Dewi Putri Lestari; Laily Fitriani Mulyani
Jurnal Natur Indonesia Vol. 21 No. 1 (2023): April
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat (LPPM) Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/

Abstract

Kabupaten Sumbawa Barat sea (KSB) is included in WPPNRI 573, including the Sawu Sea area, Indian Ocean waters, western Timor Sea, southern Java waters, and southern West Nusa Tenggara (KKP, 2014). The potential for demersal fish is in second place after pelagic fish with a total production of 103,501 tons from the potential fishery resources of WPPNRI 573 of 929,330 tons. An increase in catches that exceeds the sustainable potential value will reduce the catches of the next cycle and even have the potential for the extinction of fishery resources. So it must be overcome by making arrangements for the fishing effort to match the carrying capacity of the resource. The purpose of this study was to determine the sustainable potential of demersal fisheries and their level of utilization in West Sumbawa Regency. The methods used in the preparation of this study are field surveys and descriptive methods. The data obtained were analyzed statistically and descriptively, estimating fish stocks using the Schaefer Surplus Production Model. The results showed that the relationship between effort and CPUE obtained a linear equation y=8809-4.425x with R=0.024 which means that there is no relationship between fishing gear and catch. The catch is influenced by external factors such as seasonality and oceanographic conditions. The optimum effort value is 19,489.91 trips per year and the maximum sustainable catch is 8,584,332 kg per year. The last year's utilization rate value was 0.01% with an effort level value of 0.01%. The utilization rate is still relatively low, namely less than 100%.
Utilization and Management of Demersal Fisheries in West Sumbawa Regency, West Nusa Tenggara Province Nunik Cokrowati; Haerul Jibriel; Baiq Raihanun; Erwansyah Erwansyah; Arzianingsih Arzianingsih; Rinto Basuki; Sri Ahdyanti; Budianto Budianto; Muhammad Junaidi; Nanda Diniarti; Dewi Putri Lestari; Laily Fitriani Mulyani
Jurnal Natur Indonesia Vol. 21 No. 1 (2023): April
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jnat.21.1.29-35

Abstract

Kabupaten Sumbawa Barat sea (KSB) is included in WPPNRI 573, including the Sawu Sea area, Indian Ocean waters, western Timor Sea, southern Java waters, and southern West Nusa Tenggara (KKP, 2014). The potential for demersal fish is in second place after pelagic fish with a total production of 103,501 tons from the potential fishery resources of WPPNRI 573 of 929,330 tons. An increase in catches that exceeds the sustainable potential value will reduce the catches of the next cycle and even have the potential for the extinction of fishery resources. So it must be overcome by making arrangements for the fishing effort to match the carrying capacity of the resource. The purpose of this study was to determine the sustainable potential of demersal fisheries and their level of utilization in West Sumbawa Regency. The methods used in the preparation of this study are field surveys and descriptive methods. The data obtained were analyzed statistically and descriptively, estimating fish stocks using the Schaefer Surplus Production Model. The results showed that the relationship between effort and CPUE obtained a linear equation y=8809-4.425x with R=0.024 which means that there is no relationship between fishing gear and catch. The catch is influenced by external factors such as seasonality and oceanographic conditions. The optimum effort value is 19,489.91 trips per year and the maximum sustainable catch is 8,584,332 kg per year. The last year's utilization rate value was 0.01% with an effort level value of 0.01%. The utilization rate is still relatively low, namely less than 100%.
Co-Authors Andre Rachmat Scabra Arzianingsih Arzianingsih Bagus Dwi Hari Setyono Baiq Raihanun Budianto Budianto Dewi Putri Lestari Erwansyah Erwansyah Haerul Jibriel Muhammad Junaidi Muhammad Marzuki Nanda Diniarti Nunik Cokrowati Nunik Cokrowati Rinto Basuki Sri Ahdyanti