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Depik Jurnal Ilmu-Ilmu Perairan, Pesisir dan Perikanan
Published by Universitas Syiah Kuala
ISSN : 20897790     EISSN : 25026194     DOI : 10.13170/depik
Core Subject : Science, Education, Engineering,
Earth & Planetary Sciences Education Engineering
Depik Jurnal Ilmu-Ilmu Perairan, Pesisir dan Perikanan is a peer review international journal, this journal is publishing high-quality articles in aquatic sciences and fisheries in general. The aim of the journal is to publish and disseminate the current or new findings of the research, and give a significant contribution to the development of fisheries and aquatic sciences in several topics, but not limited to: Fisheries (Aquaculture, Capture Fisheries, Fish Processing) Aquatic Ecology (Freshwater, Marine, and Brackishwater) Aquatic Biology (Fish, Mollusk, Crustacean, Plankton, Coral reefs) Oceanography
Arjuna Subject : Ilmu Bumi dan Planet (semua kategori) - Oseanografi
Articles 944 Documents
 67   68   69   70   71 
Study on shipyard location and model development Thaib Rizwan; Husaini Husaini; Husni Husin; Akhyar Akhyar
Depik Vol 11, No 3 (2022): DECEMBER 2022
Publisher : Faculty of Marine and Fisheries, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13170/depik.11.3.28347

Abstract

The shipyard location and model highly influence shipyard industry development. This study aims to assess the location feasibility and determine the shipyard model suitable for shipyard industry development in Kutaraja Fishing Port. The study was conducted in Kutaraja Fishing Port. AHP method was used to determine the location and model, then analyzed using the Expert Choice v11 software. The data were collected using questionnaire interviews and further allocated the value using paired comparison scale table. The result shows that the shipyard industry is feasible to be developed in an area where land parameters adjacent to the waters have a maximum value of 37.3% compared with the five other parameters. The suitable shipyard model to be developed in Kutaraja Fishing Port is the slipway type with a value of 46.1%.Keywords:LocationModelShipyard
Heavy metal content in pumpkin pond of Kutaraja Fishing Port Banda Aceh Muhammad Muhammad; Shelly Anggi Pratiwi; Thaib Rizwan; Zulkarnain Jalil
Depik Vol 10, No 2 (2021): August 2021
Publisher : Faculty of Marine and Fisheries, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13170/depik.10.2.20943

Abstract

Fishing port scan support fishery resources management by incorporating social-economic activities to improve the local community's welfare; however, it can also negatively impact the environment by increasing waste pollution to the surrounding waters. Kutaraja Fishing Port, Banda Aceh, is one of the active fishing ports that conduct multiple activities, such as industrials, transportations, and domestic activities threatening the environment through the production of pollution such as heavy metals. The purpose of this study is to determine the concentration of heavy metals Zinc (Zn) and Chromium (Cr) and the sediment contamination level in the Kutaraja Fishing Port, Banda Aceh. This research was conducted in February 2021 at the water site of Samudra Kutaraja Fishing Port, Banda Aceh, and sampled sediments using the purposive sampling method. Samples were then analyzed for heavy metal concentration using the Atomic Absorption Spectrophotometer (AAS) instrument in the laboratory of the Aceh Industrial Research and Standardization Center (BARISTAND). The results showed that the concentration of heavy metal Zn ranged from 15.6507 - 27.2939 mg/kg. The majority of heavy metal Cr concentrations were below the test limit of 0.000, except at station 2, which was 9.1212. Both heavy metal concentrations are still categorized as low contamination criteria and still below the Australian and New Zealand Environment and Conservation Council (ANZECC, 2000) and the Canadian Council of Ministers for the Environment (CCME, 2002). This research proved that both heavy metals do not threaten the biota and have a low contamination level in the waters.Keywords:SedimentHeavy metal (Zn)Heavy metal (Cr)Atomic-absorptionSpectro-photometerAssessment
Variasi sebaran suhu dan klorofil-a akibat pengaruh Arlindo terhadap distribusi ikan cakalang di Selat Lombok Andry Nugroho Setiawan; Yayat Dhahiyat; Noir Primadona Purba
Depik Vol 2, No 2 (2013): August 2013
Publisher : Faculty of Marine and Fisheries, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13170/depik.2.2.723

Abstract

Abstract. The movement ofthewater mass affected Indonesian waters characterisicaretraversedbyIndonesian Throughflow which one of them in Lombok Strait. This study conductedtodetermine Indonesian Throughflow effectagainsttemperature distribution,chlorophyll-a variation and also distribution ofskipjackin theLombokStrait in 2008. The studyarealocated atcoordinate115˚E-116˚Eand8˚S-9˚S. The dataused weretemperature, chlorophyll-a, sea surfacecurrentsandalsosupported withskipjackcatches data. Visualizationresultshowed westseason,seasurface temperaturehigh enough withranged between26.62-31.12oC andchlorophyll-a concentrationby0.05596-0.9778mg(m-3)-1withthe current directiontend to lead to the northeastwith a speed ranged of0.0250-0.4439ms-1. In thefirsttransitiontemperature ofthe seasurfaceslightlydecreasedrangedbetween26.77-30.30oC andfollowed by arise chlorophyll-a concentrationby0.07302-0.7324mg(m-3)-1withthe current directiontend to leadto the eastwith a speed ranged0.0640-0.8123ms-1. In the east season,seasurfacetemperaturewas quitelow,ranged from24.30-29.33oC andfollowedwithan increased chlorophyll-a concentrationby0.1491-0.9897mg(m-3)-1 withthe current directiontend to leadto the southeastwith a speed ranged by0.4351-1.1813 ms-1. In thesecondtransition, seasurfacetemperature rised back withranged25.12-31.05oC andfollowed bydecreased concentration ofchlorophyll-a by0.09565-0.9456mg(m-3)-1withthe current directiontend to leadto the southeastwith a speed ranged by0.1129-0.7336ms-1. The relationship betweentemperatureandchlorophyll-a resultshowedvariationbutona warmtemperatureandfairlyhigh chlorophyll-a, catchedarehigh enoughinSeptember-November.Keywords: Indonesian Throughflow; Lombok Strait; Skipjack Abstrak.Pergerakan ARLINDO yang melalui perairan Indonesia berpengaruh pada karakteristik perairan di timur Indonesia dimana salah satunya adalah Selat Lombok. Kajian ini menekankan pengaruh Arlindo terhadap variasi sebaran suhu dan klorofil-a terhadap hasil tangkapan ikan cakalang di Selat Lombok pada periode tahun 2008. Data yang digunakan yaitu suhu, klorofil-a, arus permukaan dan hasil tangkapan ikan cakalang. Hasil visualisasi menunjukkan pada musim barat, suhu permukaan lautnya cukup tinggi yaitu berkisar 26,62-31,12oC dan konsentrasi klorofil-a sebesar 0,056-0,978mg (m-3)-1 dengan arah arus cenderung ke timur laut dengan kecepatan 0,0250-0,4439 m/detik. Pada musim peralihan I suhu permukaan lautnya sedikit mengalami penurunan yaitu berkisar 26,77-30,30oC dan dan diikuti dengan kenaikan konsentrasi klorofil-a sebesar 0,073-0,732mg (m-3)-1 dengan arah arus cenderung ke timur dengan kecepatan 0,0640-0,8123 m/detik. Pada musim timur suhu permukaan lautnya cukup rendah yaitu berkisar 24,30-29,33oC dan dan diikuti dengan kenaikan konsentrasi klorofil-a sebesar 0,149-0,989mg (m-3)-1 dengan arah arus ke tenggara dengan kecepatan 0,4351-1,1813 m/detik. Pada musim peralihan II suhu permukaan lautnya kembali naik yaitu berkisar 25,12-31,05oC dan dan diikuti dengan penurunan konsentrasi klorofil-a sebesar 0,096-0,946mg (m-3)-1 dengan arah arus ke tenggara dengan kecepatan 0,1129-0,7336 m/detik. Hubungan antara suhu dan klorofil-amenunjukkan adanya variasi akan tetapi pada suhu yang hangat dan klorofil-a yang cukup tinggi terdapat hasil tangkapan yang cukup tinggi yaitu pada bulan September-November.Kata kunci : Arlindo; Selat Lombok;  Ikan Cakalang 
Bioakumulasi residu pestisida pada komunitas gastropoda di perairan Sungai Kalisat, Kabupaten Malang Nanik Retno Buwono; Trinita Gultom; Setya Widi Ayuning; Supriatna Supriatna
Depik Vol 8, No 3 (2019): December 2019
Publisher : Faculty of Marine and Fisheries, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13170/depik.8.3.14368

Abstract

Abstract. Gastropods can respond to pesticide pollution in the environment because their life is relatively sedentary and their movements are very limited. The character of pesticides are not selective and persistent can result in bioaccumulation of pesticide content in gastropod. Hence, the  aim of the study was to determine the levels of pesticide residues that accumulate in the gastropod body at Kalisat River, Malang Regency. The pesticide residues in gastropods was measured using High Performance Liquid Chromatography (HPLC). Data were analyzed descriptively comparative or compared with the quality standards which exceeded the maximum residual limit set by the EU Pesticide Database. The results showed that pyrethroid pesticides were found with the active ingredient beta-cyfluthrin (mean 0.05 mg/g) and carbamate group with three highest active ingredients namely propoxur (average value of 0.15 mg/g), carbofuran (average value of  0.16 mg/g) and carbaryl (average value of 0.11 mg/g). Bioaccumulation factor values at all stations are greater than 1 (BAF1) that indicates the gastropods can accumulate pesticide residues.Keywords: bioaccumulation, gastropod, pesticide residues, Kalisat River Abstrak. Gastropoda dapat memberikan respon terhadap pencemaran pestisida di lingkungan karena hidupnya relatif menetap dan pergerakannya sangat terbatas. Sifat pestisida yang tidak selektif dan persisten dapat mengakibatkan terjadinya bioakumulasi atau penumpukan kandungan pestisida dalam tubuh gastropoda. Penelitian ini bertujuan untuk mengetahui kadar residu pestisida yang terakumulasi dalam tubuh gastropoda di Sungai Kalisat, Kabupaten Malang. Pengukuran residu pestisida pada gastropoda menggunakan alat High Performance Liquid Chromatography (HPLC). Hasil pengukuran menunjukkan bahwa ditemukan pestisida golongan piretroid dengan bahan aktif jenis beta siflutrin (rerata 0,05 mg/g) dan golongan karbamat dengan tiga jenis bahan aktif tertinggi, yaitu propoksur (rerata 0,15 mg/g), karbofuran (rerata 0,16 mg/g) dan karbaril (rerata 0,11 mg/g). Data dianalisis secara deskriptif komparatif atau dibandingan dengan baku mutu EU Pesticide Database tahun 2019 telah melebihi batas maksimum residu yang ditetapkan oleh EU Pesticide Database. Nilai faktor bioakumulasi pada seluruh stasiun lebih besar dari 1 (BAF1) yang menunjukkan bahwa gastropoda mampu mengakumulasi residu pestisida. Pestisida dapat ditemukan pada gastropoda dengan melalui difusi langsung dari lingkungan dan juga melalui proses pencernaan gastropoda. Kata kunci: bioakumulasi, gastropoda, residu pestisida, Sungai Kalisat
Iktiofauna Sungai Sangkir Kabupaten Rokan Hulu Provinsi Riau (Ichthyofauna of Sangkir River, Rokan Hulu District Riau Province) Nunuk Dian Pranata; Arief Anthonius Purnama; Rofiza Yolanda; Ria Karno
Depik Vol 5, No 3 (2016): December 2016
Publisher : Faculty of Marine and Fisheries, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13170/depik.5.3.5574

Abstract

This study was conducted in Sangkir river branch of Rokan Kiri river Sangkir village, Rokan Hulu district, Riau Province from May of July 2016. The aim of this study was to inventory the fish species in Sangkir river branch of Rokan Kiri River with direct observation (survey). Five sampling locations were determined purposely based on the environmental condition that could be represented by the river condition. A total of 288 individuals of fish belonging to 3 orders, 7 families, 13 genera and 16 species were recorded in this study, namely Barbodes balleroides, Barbodes gonionotus, Barbichthys leavis, Channa striata, Cyclocheilichthys apogon, Labiobarbus fasciatus, Mystus nigriceps, Ompok eugeneiatus, Osteochilus hasseltii, Osteochilus mycrocephalus, Pangio semicincta, Pristolepis grooti, Thynnichthys polylepis, Trichogaster leerii, Trichogaster trichopterus and Trichopsis vittata. Cyprinidae was the most abundance fish in this study.Penelitian ini telah dilaksanakan di sungai Sangkir, anak sungai Rokan Kiri, desa Sangkir, Kabupaten Rokan Hulu, Provinsi Riau pada bulan Mei sampai Juli 2016. Penelitian ini bertujuan untuk mengetahui jenis-jenis ikan di sungai Sangkir anak Sungai Rokan Kiri dengan metode pengamatan langsung (survei) dengan penetapan stasiun pengambilan sampel secara purposive sampling. Penetapan stasiun berdasarkan kondisi lingkungan yang terdiri dari 5 stasiun penelitian. Hasil penelitian  didapatkan sebanyak 288 individu ikan yang terdiri dari 3 ordo, 7 famili 13 genus dan 16 spesies. Spesies yang didapatkan yaitu Barbodes balleroides, Barbodes gonionotus, Barbichthys leavis, Channa striata, Cyclocheilichthys apogon, Labiobarbus fasciatus, Mystus nigriceps, Ompok eugeneiatus, Osteochilus hasseltii, Osteochilus mycrocephalus, Pangio semicincta, Pristolepis grooti, Thynnichthys polylepis Trichogaster leerii, Trichogaster trichopterus dan Trichopsis vittata. Cyprinidae merupakan kelompok ikan yang paling banyak dalam penelitian ini. 
Dynamics of plankton populations as natural food for fish in a tributary of the Ogan River Elva Dwi Harmilia; Khusnul Khotimah; Irkhamiawan Ma'ruf; Intan Pratiwi
Depik Vol 11, No 2 (2022): August 2022
Publisher : Faculty of Marine and Fisheries, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13170/depik.11.2.25498

Abstract

The research was conducted to determine the abundance, diversity, uniformity, and dominance of plankton in fish stomachs and waters that are expected to provide information about water productivity. The research was carried out in a tributary of the Ogan River, Indralaya District, Ogan Ilir Regency, South Sumatra at three stations, namely Indralaya Mulya Village, Tanjung Seteko Village and Muara Penimbung Village. The method used field surveys and location determination using purposive sampling with fish stomach contents, water samples for plankton observations, and water quality parameters. Fish sampling was carried out six times in 3 months, and water samples for plankton observations were one time per month, from April to June 2018. Plankton is found in fish stomachs and waters with a total abundance of 35.6 - 448.12 ind/l plankton consisting of 8 divisions with 11 classes. The plankton diversity index has moderate diversity and moderate community stability with a value between 1.11 - 1.45. The uniformity index of plankton in the fish stomach showed small uniformity of plankton (0.41-0.67), while in the waters, at station three and station 1 in April, the uniformity was high (E values 0.72 and E 0.93). The value of the plankton dominance index is in the range of 0.27-0.37. No species dominate other species or D = 0 (0.5), with moderately polluted water quality
Pola pertumbuhan dan faktor kondisi ikan sembilang (Potosus canius) di Teluk Bintan Kepulauan Riau Tri Yulianto; Wiwin Kusuma Atmadja; Zulpikar Zulpikar; Risma Ariska; Ani Suryanti
Depik Vol 9, No 3 (2020): December 2020
Publisher : Faculty of Marine and Fisheries, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13170/depik.9.3.12623

Abstract

One of the economically important fish included in the Plotosidae family is the Sembilang Fish. This study aims to determine the growth patterns and condition factors of the Sembilang fish. The research was conducted in July 2018. The locations of the Sembilang Fish sampling station include Dompak Island Bay, Bugis Village Bay, Madong Bay, Pengujan Bay and Tanjung Uban. The total sample of Sembilang Fish that has been obtained is 150, consisting of 80 males and 70 females. Total length ranges from 19.7-66 cm, with weights ranging from 33.68-960 g. The mode of distribution of the frequency of the fish caught during the study was in the second class interval, namely 25.7-30.7. The relationship between the length and weight of male Sembilang fish is W = 0, 0268L2,5378 and the female is W = 0, 00542L2,3347. The growth pattern of Sembilang fish, both male and female, is negative allometric which shows the length growth is faster than the weight. Fish condition factors obtained during the study ranged from 0.723 to 1.166.Keywords:BintanCondition FactorLength-weight-relationshipPlotosus caniusSembilang fish ABSTRAKSalah satu ikan ekonomis penting yang termasuk dalam famili Plotosidae adalah Ikan Sembilang. Penelitian ini bertujuan untuk mengetahui pola pertumbuhan dan faktor kondisi ikan sembilang. Penelitian dilaksanakan pada bulan Juli 2018. Lokasi stasiun pengambilan sampel Ikan Sembilang diantaranya Teluk Pulau Dompak, Teluk Kampung Bugis, Teluk Madong, Teluk Pengujan dan Tanjung Uban. Total sampel Ikan Sembilang berjumlah 150 ekor, terdiri dari 80 ekor jantan dan 70 ekor betina. Ukuran panjang total berkisar antara 19,7-66 cm, dengan berat berkisar antara 33,68-960 g. Modus distribusi frekuensi ikan sembilang yang tertangkap selama penelitian ada pada selang kelas kedua yaitu 25,7-30,7. Hubungan panjang dan bobot Ikan Sembilang jantan adalah W = 0, 0268L2,5378 dan betina adalah W = 0, 00542L2,3347. Pola pertumbuhan Ikan Sembilang baik jantan maupun betina adalah alometrik negatif yang memperlihatkan pertumbuhan panjang lebih cepat daripada bobotnya. Faktor kondisi ikan selama penelitian nilainya berkisar antara 0,723 hingga 1,166.Kata kunci: BintanFaktor kondisiHubungan panjang-bobotPlotosus caniusIkan Sembilang
Pengaruh ENSO (El Niño and Southern Oscillation) terhadap transpor massa air laut di Selat Malaka Muhammad M; Syamsul Rizal; Junaidi M. Affan
Depik Vol 1, No 1 (2012): April 2012
Publisher : Faculty of Marine and Fisheries, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13170/depik.1.1.28

Abstract

Abstract. This research examines the influence of ENSO (El Niño and Southern Oscillation) in the Malacca Strait with the southern oscillation index using the Pacific Ocean in determining the condition of Normal, El Niño and La Nina as the analysis of mass transpor of sea water, sea surface elevation and the density of the sea. The research methods using the Navier-Stokes equations with force generating tides, winds from the National Centers for Environmental Prediction (NCEP) Year 1980- 007, salinity(Levitus and Boyer, 1994a) and temperature (Levitus and Boyer, 1994b). Equations of motion of the sea water were modeled with the model of Hamburg Shelf Ocean Model (HAMSOM). The results show that the transport in northwestern part of the Malacca Strait is lower, but in the southeastern part is stronger compared to that of in Normal and La Nina events. While in Sea Level Elevation at El Niño event is lower compared to that of in Normal and La Nina events. For sea surface density, the density values are 18.5 s/d 20.5 kg/m3 while for the later 30-50 m, the values are 19-21 kg/m3. Sea surface density and density for layer 30-50 m in th southeastern part of Malacca Strait for El Niño events are higher than that of in normal and La Nina event. Key words: Sea level elevation, sea density and Hamsom model
Status mutu air dan kandungan logam berat pada air dan sedimen di muara Krueng Aceh, Kota Banda Aceh Iqbalul Hadi; Suhendrayatna Suhendrayatna; Zainal Abidin Muchlisin
Depik Vol 7, No 2 (2018): August 2018
Publisher : Faculty of Marine and Fisheries, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13170/depik.7.2.8606

Abstract

The aim of this research was to examine the status of water qaility of the Krueng Aceh estuary and heavy metal content in water and sediment. Data were taken by direct measurement in the field (in situ) and in the laboratory (ex situ). Three sampling stations were determined by purposive sampling, namely; in the left bank (nearest location with TPA), right bank (nearest location to market) and middle river (middle river area often passed by fisherman boat). Heavy metal analysis was conducted using AAS (Atomic Absorption Spectrophotometer) method and water quality status determined by STORET method. Based on the research result showed that that water quality parameters that have passed the standard of PP RI No. 82 Year 2001 Group III is TDS with an average value of 3332.78 mg / L, Pb with an average value of 0.052 mg / L, and Cd with an average value of 0.015 mg / L. The quality status of Krueng Aceh estuary water is classified into a moderate polluted or class C with a score of -23. The highest heavy metal content found in water sample is Pb with concentration of 0.106 mg / L. While, the average value of Pb was 0.052 mg / L and Cd was 0.015 mg /L, its have passed the quality standard specified in PP RI no. No. 82 of 2001. In addition, the highest heavy metal content found in sediment was Zn with the concentration of 29.633 mg /kg and its average value was still below the standard set by ANZECC ISQG-Low.Penelitian ini dilakukan untuk mengetahui status mutu kualitas air muara Krueng Aceh dan kandungan logam berat yang terdapat pada air dan sedimen. Metode yang digunakan dalam penelitian ini adalah metode survey. Data parameter yang diambil melalui pengukuran langsung di lapangan (in situ) dan di laboratorium (ex situ). Penentuan stasiun sampling secara purposive, yaitu pada muara Krueng Aceh dengan menetapkan tiga titik sampling yaitu pada tepi kiri (lokasi terdekat dengan TPA), tepi kanan (lokasi terdekat dengan pasar) dan tengah sungai (daerah tengah aliran sungai yang sering dilalui boat nelayan). Analisis logam berat dilakukan dengan metode SSA (Spektrofometri Serapan Atom) dan status mutu air ditentukan dengan metode STORET. Berdasarkan hasil penelitian dapat diketahui parameter kualitas air yang telah melewati baku mutu PP RI No 82 Tahun 2001 Golongan III adalah TDS dengan dengan nilai rata-rata 3332,78 mg/L, Pb dengan nilai rata-rata 0,052 mg/L, dan Cd dengan nilai rata-rata 0,015 mg/L. Status mutu air muara Krueng Aceh diklasifikasikan ke dalam tercemar sedang atau kelas C dengan skor -23. Kandungan logam berat tertinggi yang ditemukan pada sampel air di muara Krueng Aceh adalah Pb dengan konsentrasi 0,106 mg/L. Nilai rata-rata Pb 0,052 mg/L dan Cd 0,015 mg/L telah melewati baku mutu yang ditetapkan dalam PP RI No. 82 Tahun 2001. Kandungan logam berat tertinggi yang ditemukan pada sampel sedimen di muara Krueng Aceh adalah Zn dengan konsentrasi 29,633 mg/Kg dan nilai rata-ratanya masih berada di bawah baku mutu yang ditetapkan oleh ANZECC ISQG-Low. 
Analisa ekonomi usaha pendederan kerapu macan (Epinephelus fuscoguttatus) dan kerapu lumpur (Epinephelus coioides) dalam tambak di Kabupaten Bireuen Provinsi Aceh Farok Afero; Safrita AM
Depik Vol 4, No 1 (2015): APRIL 2015
Publisher : Faculty of Marine and Fisheries, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13170/depik.1.1.2306

Abstract

Abstract. This study presented an economic analysis of nursery operation for tiger and green grouper with different production scales. The result highlighted small scale nursery of tiger grouper with a 3 year projected both positive cumulative cash flows and NPV. Small scale of green grouper highlighted both positive cumulative cash flow and NPV, also IRR and B/C higher than the medium and large scale. Medium scale of tiger grouper generated both positive cumulative cash flow and NPV. In addition, medium scale of tiger grouper generated IRR and B/C higher than small and large scale. Medium scale of green grouper generated IRR and B/C higher than large scale. The results of the financial analysis indicated the income of large scale of tiger grouper higher than medium scale, but the ratio benefit of medium scale higher than large scale. Small scale of green grouper indicated ratio benefit higher than medium and large scale. The sensitivity analysis showed decreased survival rate to 60% affects a negative contribution to the NPV, IRR and B/C on a large scale of green grouper. On the other side, small scale of green grouper obtained higher profit ratio despite a decline in survival rate, an increase in seed costs and falling seed prices. This suggests that small scale of green grouper not affected to volatility of the main variable costs.Keywords: Nursery; tiger grouper; green grouper; production scaleAbstrak. Penelitian ini menyajikan analisa ekonomi pendederan kerapu macan dan lumpur dengan skala produksi yang berbeda. Penelitian menunjukkan bahwa budidaya kerapu macan dalam skala kecil, dengan proyeksi 3 tahun menghasilkan arus kas kumulatif dan NPV positif. Sedangkan pendederan kerapu lumpur skala kecil menunjukkan arus kas kumulatif dan NPV positif, IRR dan B/C yang lebih tinggi dibandingkan dengan pendederan skala menengah dan besar. Pendederan kerapu macan skala menengah menghasilkan aliran kas dan NPV positif. Selain itu, pendederan kerapu macan skala menengah menghasilkan IRR dan B/C yang lebih tinggi dari kecil dan besar. Sedangkan pada pendederan kerapu lumpur skala menengah menghasilkan IRR dan B/C lebih tinggi dari skala besar. Hasil analisis keuangan menunjukkan bahwa pendapatan pendederan kerapu macan pada skala besar lebih tinggi daripada skala menengah, tetapi rasio keuntungan skala menengah lebih tinggi dibandingkan skala besar, sedangkan pada pendederan kerapu lumpur menunjukkan bahwa rasio keuntungan skala kecil lebih lebih tinggi dibandingkan skala menengah dan besar. Analisis sensitivitas menunjukkan bahwa penurunan sintasan kehidupan sampai 60% memberikan kontribusi negatif pada NPV, IRR dan B/C pada pendederan kerapu lumpur skala besar. Sebaliknya pendederan kerapu lumpur skala kecil memperoleh rasio keuntungan yang lebih tinggi meskipun terjadi penurunan sintasan kehidupan, peningkatan biaya benih dan penurunan harga. Hal ini menunjukkan bahwa pendederan kerapu lumpur skala kecil tidak berpengaruh dengan volatilitas biaya variable utama.Kata kunci: Pendederan; kerapu macan; kerapu lumpur; skala produksi

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