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All Journal JURNAL TEKNOLOGI LINGKUNGAN BERITA BIOLOGI JURNAL KESEHATAN LINGKUNGAN: Jurnal dan Aplikasi Teknik Kesehatan Lingkungan JFMR (Journal of Fisheries and Marine Research) LIMNOTEK - Perairan Darat Tropis di Indonesia
Andri Warsa
Staf Peneliti pada Loka riset Pemacuan Stok Ikan, Jatiluhur
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Engineering Environmental Science Public Health

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POTENSI PRODUKSI DAN KEBUTUHAN BENIH UNTUK PENGEMBANGAN PERIKANAN TANGKAP DI EMBUNG NUSA TENGGARA TIMUR Warsa, Andri; Krismono, Krismono
LIMNOTEK - Perairan Darat Tropis di Indonesia Vol 25, No 2 (2018)
Publisher : Research Center for Limnology

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Embung or retention basin is one of the surface water sources in the form of artificial lake obtained from harvesting the rain and surface water. East Nusa Tenggara (NTT) Province has built 963 retention basins and three dams which are used mainly for irrigation, plantation, and livestock, while for fisheries it has not been developed optimally. The development of capture fisheries through the stocking of fish seeds is one of the efforts to optimize the utilization and management of water bodies. The failure of fish stockings in several water bodies in NTT is thought to be caused by lack of scientific studies before the stockings. Therefore, the purpose of this research was to determine the potential of fisheries production and the optimal number of seeds for the development of capture fisheries in the retention basins of NTT. The research was conducted in September 2016. Water samples were taken at a depth of 0.5 m from the surface using the Kemmerer water sampler. Secondary data which included fish growth parameters were obtained from literature, while seed production and morphological characteristics of water bodies were obtained from relevant institutions. The results showed that Embung Tulamalae and Oelpuah were eutrophic, while Embung Haekrit and Haliwen were oligotrophic. The average potential of fisheries production based on MEIcond ranged 41.3−68.7 kg/ha/year with an average of 52.8 kg/ha/year, while based on chlorophyll a content ranged 29.8‒55.8 kg/ha/year with an average of 43.6 kg/ha/year. Estimation of seed requirements for restocking in the context of developing capture fisheries ranged from 1,000 to 48,600 individuals/year. Based on the water quality and economic values obtained, embung at the research locations are feasible for fish stocking in the capture fisheries development.
UKURAN PERTAMA KALI MATANG GONAD DAN SELEKTIVITAS JARING INSANG IKAN NILA (OREOCHROMIS NILOTICUS) DI WADUK JATILUHUR, JAWA BARAT Warsa, Andri; Astuti, Lismining Pujiyani
BERITA BIOLOGI Vol 18, No 3 (2019)
Publisher : Research Center for Biology-Indonesian Institute of Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/beritabiologi.v18i3.3720

Abstract

A gillnet is a common fishing gear for exploitation and fish capture at Jatiluhur Reservoir. The fish size captured by the gillnet depends on the mesh size for its selective fishing gear. Determination of gillnet mesh size is one of effort for fisheries management.  The management of nile tilapia (Oreochromis niloticus) is based on gillnet selectivity and reproductive biology of nile tilapia. The aim of the research was to estimate length at the first mature (Lm) and gillnet selectivity for nile tilapia. The research was conducted at February-September 2017 through experimental fishing using gillnet with 1.0?4.0 mesh size (interval 0.5 inch). The gillnet installation was performed at six stations, namely Cihuni-Cibadak, Sungai Cikanyayan, Sungai Ciririp, Sungai Cihonje, Pasir Kole and Cilalawi. The Lm of nile tilapia was 18.3 and 23.3 cm for female and male, respectively. The total length retained in the gillnet with the highest probability for mesh size 1.0; 1.5; 2.0; 2.5; 3.0; 3.5 and 4.0 inches were 9.5; 12.5; 14.5; 18.5; 20.5; 26.5 and 30.5 cm, respectively. The minimum mesh size used for nile tilapia exploitation was ?3 inches because it was able to catch nile tilapia with the total length larger than Lm (Lc>Lm) and with an SPR value of > 40% so that the tilapia resource in the Jatiluhur Reservoir remains sustainable.  
Estimasi Beban Cemar dan Laju Dekomposisi Bahan Organik di Waduk Ir. H. Djuanda, Jawa Barat Warsa, Andri; Astuti, Lismining Pujiyani
Jurnal Teknologi Lingkungan Vol. 21 No. 1 (2020)
Publisher : Center for Environmental Technology - Agency for Assessment and Application of Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (529.123 KB) | DOI: 10.29122/jtl.v21i1.3345

Abstract

ABSTRACTIr. H. Djuanda or Jatiluhur reservoir as a multifunction water body with one of utilization as fish cultivation activity. Uneaten feed and fish excretion were organic matter sources. The number of floating net cages was increasing and it caused increasing in organic matter load. The objective of the research was to known organic matter load and decomposition rate (k) and BOD (Biochemical oxygen demand) ultimate (Lo) at Jatiluhur Reservoir. The research was done in February and August 2018 at three locations were Astap, Pasir Canar and Pulau Aki. The result of the research shown was organic load from cultivation activity was 70,595 tons/year. The decomposition rate of organic matter around 0.10-0.25 per day with BOD ultimate around 6.80-8.11 mg/L. The value of Lo was affected by organic matter concentration.Keywords: Ir. H. Djuanda Reservoir, organic matter, decomposition rate, BOD ultimateABSTRAKWaduk Ir. H. Djuanda atau yang dikenal dengan Waduk Jatiluhur merupakan waduk multifungsi yang salah satu pemanfaatannya untuk kegiatan budidaya ikan. Sisa pakan yang terbuang dan ekresi ikan merupakan sumber masukkan bahan organik. Jumlah keramba jaring apung (KJA) yang semakin bertambah akan menyebabkan beban masukkan bahan organik meningkat. Tujuan penelitian ini adalah untuk mengetahui beban masukkan bahan organik dari kegiatan budidaya dan laju dekomposisi bahan organik (k) serta BOD (Biochemical oxygen demand) ultimate (Lo) di Waduk Jatiluhur. Penelitian dilakukan pada bulan Februari dan Agustus 2018 pada tiga lokasi yaitu Astap, Pasir Canar dan Pulau Aki. Pendekatan yang digunakan dalam penentuan nilai k dan Lo adalah metode Grafik Thomas. Hasil penelitian menunjukkan bahwa beban masukkan bahan organik dari kegiatan budidaya sebesar 70.595 ton/tahun. Beban masukkan bahan organik telah melebihi daya dukung perairan. Nilai k untuk dekomposisi bahan organik di Waduk Jatiluhur berkisar 0,10-0,25 per hari dengan nilai Lo berkisar 6,80-8,11 mg/L. Nilai Lo dipengaruhi oleh konsentrasi bahan organik di perairan.    Kata kunci: Waduk Ir. H. Djuanda, bahan organik, laju peluruhan, BOD ultimate 
Mitigasi Beban Fosfor dari Kegiatan Budidaya dengan Penebaran Ikan Bandeng (Chanos chanos) Di Waduk Cirata, Jawa Barat Warsa, Andri; Haryadi, Joni; Astuti, Lismining Pujiyani
Jurnal Teknologi Lingkungan Vol. 19 No. 2 (2018)
Publisher : Center for Environmental Technology - Agency for Assessment and Application of Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (259.089 KB) | DOI: 10.29122/jtl.v19i2.2669

Abstract

ABSTRACTThe phosphorus loading from aquaculture activity as a product of floating net cages (KJA) in Cirata Reservoir have exceeded the carrying capacity of the aquatic ecology. This results in a decrease in water quality which is characterized by uncontrolled phytoplankton growth. The stocking of fish is one of the ways used in the improvement of the aquatic environment resulting eutrophication. Phosphorus which is wasted from cultivation activity will be utilized by phytoplankton for its growth. The phytoplankton can be utilized by planktivorous fish as its natural feed. One type of fish that can be used for stocking is a planktivora fish as milkfish (Chanos chanos). The purpose of this study was to estimate the load of phosphorus and calculate the number of milkfish seeds which are planktivorous fish that can be stocked with the aim of reducing phosphorus waste from aquaculture activities in Cirata Reservoir, West Java. The result showed that P load from cultivation activity at Cirata Reservoir was 1,206 tons/year. The concentration of chlorophyll-a and the primary productivity produced by the P load from the cultivation activities were 28.6 mg/m3 and 364.6 gC/m2/year respectively. The number of milkfish seeds that can be stocked as an effort to utilize the load of phosphorus as much as 1.8 million/year. The P load can be reduced based on estimation of harvested fish biomass and phosphor requirement for milkfish of 11.52 ton/year.Keywords: Cirata Reservoir, phosphorus loading, stocking, milkfishABSTRAKBeban masukkan fosfor (P) dari kegiatan budidaya ikan dalam keramba jaring (KJA) dari pakan yang terbuang dan sisa metabolisme ikan di Waduk Cirata telah melebihi daya dukung ekologi perairan. Hal ini berdampak pada penurunan kualitas perairan yang ditandai oleh pertumbuhan fitoplankton yang tidak terkendali. Penebaran ikan merupakan salah satu cara yang digunakan dalam perbaikan lingkungan perairan akibat dari eutrofikasi. Fosfor di perairan dimanfaatkan oleh fitoplankton untuk pertumbuhannya. Fitoplankton tersebut dapat dimanfaatkan oleh ikan planktivora sebagai pakan alaminya.Salah satu jenis ikan yang dapat ditebar (stocking) adalah ikan planktivora yaitu ikan bandeng (Chanos chanos). Tujuan penelitian ini adalah untuk mengestimasi beban masukkan fosfor serta menghitung jumlah benih ikan bandeng yang dapat ditebar dengan tujuan pengurangan limbah fosfor dari kegiatan budidaya di Waduk Cirata, Jawa Barat. Hasil penelitian menunjukkan beban P yang berasal dari kegiatan budidaya di Waduk Cirata sebesar 1.206 ton/tahun. Konsentrasi klorofil-a dan produktivitas primer yang dihasilkan oleh beban P dari kegiatan budidaya masing-masing sebesar 28,6 mg/m3 dan 364,6 gC/m2/tahun. Jumlah benih ikan bandeng yang dapat ditebar sebagai upaya pemanfaatan beban masukkan fosfor sebanyak 1,8 juta ekor/tahun. Beban P yang mampu dikurangi berdasarkan estimasi biomassa ikan yang dipanen dan kebutuhan fosfor untuk ikan bandeng sebesar ton 11,52 ton/tahun.Kata kunci: Waduk Cirata, beban fosfor, penebaran, bandeng
Spatial and Temporal Distribution of Water Plant Based on Satellite Imagery and the Effect in Jatiluhur Reservoir Rahman, Arip; Anwar Putri, Masayu Rahmia; Purnamaningtyas, Sri Endah; Astuti, Lismining Pujiyani; Warsa, Andri
JURNAL KESEHATAN LINGKUNGAN: Jurnal dan Aplikasi Teknik Kesehatan Lingkungan Vol 21 No 2 (2024): Jurnal Kesehatan Lingkungan Volume 21 No. 2, Juli 2024
Publisher : Poltekkes Kemenkes Banjarmasin Jurusan Kesehatan Lingkungan Banjarbaru

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31964/jkl.v21i2.885

Abstract

Water vegetation in lakes or reservoirs can change the water's ecology. Water vegetation in Jatiluhur Reservoirs is dominated by water hyacinth (Eichhornia crassipes). Water hyacinth in lakes or reservoirs becomes an invasive weed that can cause ecological degradation. Jatiluhur Reservoir is one of the water bodies affected by the uncontrolled growth of water vegetation. The study was conducted to determine the spatial and temporal distribution patterns of water vegetation and its effect on Jatiluhur Reservoir. Water vegetation's spatial and temporal distribution was analyzed using Sentinel-2A satellite image data. The Normalized Difference Vegetation Index (NDVI) algorithm was used to see the distribution of water vegetation in the reservoir waters. The observations show that the movement of water vegetation starts from the inlet area and then moves along with the flow of water to the center of the reservoir. Finally, it accumulates in the outlet area. The correlation between vegetation cover area and month of observation obtained the equation y=662.5x + 128.1. Based on the equation, the increasing vegetation cover area in the Jatiluhur Reservoir is predicted to reach 128.1 ha per month. The physical method used for controlling the growth and distribution of vegetation (water hyacinth) in Jatiluhur Reservoir by taking in the waters. Efforts to control vegetation physically must notice the increasing rate of water hyacinth distribution.
PENETAPAN UKURAN MATA JARING LANGLI UNTUK PENANGKAPAN BILIH (Mystacoleucus padangensis) DI DANAU SINGKARAK Warsa, Andri; Hendrawan, Andika Luki Setiyo; Krismono, Mr.
JFMR (Journal of Fisheries and Marine Research) Vol. 4 No. 1 (2020): JFMR
Publisher : Faculty of Fisheries and Marine Science, Brawijaya University, Malang, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jfmr.2020.004.01.25

Abstract

Ikan bilih (Mystacoleucus padangensis) yang spesies merupakan endemik di Danau Singkarak dan mempunyai nilai ekonomis penting dan dominan tertangkap oleh nelayan dengan menggunakan alat tangkap langli. Namun saat ini populasinya telah mengindikasikan penurunan sebagai akibat penggunaan alat tangkap yang tidak selektif. Oleh karena itu perlu adanya suatu penelitian mengenai selektivitas alat tangkap langli sebagai upaya pengelolaan sumber daya ikan yang berkelanjutan. Tujuan penelitian ini adalah untuk menentukan ukuran mata jaring langli yang dapat digunakan serta panjang total ikan bilih yang boleh ditangkap. Penelitian dilakukan pada bulan Juli dan September 2019 dengan percobaan penangkapan menggunakan jaring langli dengan ukuran mata jaring 5/8; ¾; 1,0 dan 11/4 inci di Sumpur dan Aripan. Panjang total ikan bilih betina dan jantan yang tertangkap selama penelitian masing-masing berkisar 5,0-10,9 cm dan 5,0-9,9 cm. Penggunaan mata jaring 5/8 dan ¾ inci akan mengakan ikan bilih pada ukuran lebih kecil dari Lm. Adanya tekanan penangkapan yang ditandai oleh penurunan ukuran ikan yang tertangkap serta ukuran pertama kali matang gonad. Oleh karena itu perlu adanya penetapan ukuran mata jaring dan ukuran ikan bilih yang boleh dieksploitasi. Jaring langli yang boleh digunakan untuk penangkapan harus memiliki ukuran mata jaring ≥ 1,0 inci dengan ukuran panjang total ikan bilih > 10 cm. Ukuran panjang total tersebut lebih besar jika dibandingkan dengan ukuran pertama kali matang gonad serta memberikan hasil optimal.
Co-Authors Anwar Putri, Masayu Rahmia Arip Rahman Hendrawan, Andika Luki Setiyo Joni Haryadi, Joni Krismono Krismono Krismono, Mr. Lismining Pujiyani Astuti, Lismining Pujiyani Sri Endah Purnamaningtyas