scholarly journals Application of Surplus Production Model to the Yellowfin Tuna Thunnus albacares in the northern and western parts of Aceh waters

2021 ◽  
Vol 869 (1) ◽  
pp. 012072
Author(s):  
A Rahmah ◽  
I Mardhatillah ◽  
A Damora ◽  
M Muhammad ◽  
N Nurfadillah
Keyword(s):  
Economic Value ◽  
Maximum Sustainable Yield ◽  
Yellowfin Tuna ◽  
Production Model ◽  
Purse Seine ◽  
Thunnus Albacares ◽  
Catch Per Unit Effort ◽  
Surplus Production ◽  
Surplus Production Model ◽  
Banda Aceh

Abstract Yellowfin tuna Thunnus albacares is one of pelagic fish that has high potential and economic value in Banda Aceh. Utilization of this resource in Banda Aceh is using purse seine units, with the number of purse seines continuously increasing. Therefore, management needs to be done so that optimal productivity can be maintained. This study discusses the estimation of catch and effort at maximum sustainable yield (MSY) of yellowfin tuna based on catch per unit effort (CPUE) and purse seine production in Banda Aceh during 2013-2018. Mathematical analysis was carried out using the equilibrium approach with the Schaefer model. The highest catch of yellowfin tuna reached 191 tons (July) and the average CPUE for yellowfin tuna was 0.796 tons/trip with CMSY of 2,482 tons/year and EMSY of 2,765 trips/year. From 2015 to 2018, the trend of biomass continued to decline and overfishing occurred during this period.

scholarly journals Fishery and estimation of Potential yield for Bombayduck Harpodon nehereus along Gujarat coast, India

2020 ◽  
Vol 67 (1) ◽  
Author(s):  
Vinaya Kumar Vase ◽  
Rajan Kumar ◽  
A. D. Nakwa ◽  
Shikha Rahangdale ◽  
J. Jayasankar ◽  
...  
Keyword(s):  
Maximum Sustainable Yield ◽  
Production Model ◽  
Optimum Level ◽  
Catch Per Unit Effort ◽  
Potential Yield ◽  
North West ◽  
Surplus Production ◽  
North East ◽  
The North ◽  
Surplus Production Model

Bombayduck Harpadon nehereus (Hamilton, 1822) is one of the key fishery resources landed along the Indian coast with uniqueness in distribution and exploitation. The resource is known for discontinuous distribution, majorly along the north-west and north-east coasts of India. Gujarat is the lead state to contribute nearly 64.72% (72,949 t) to the total national landings of the resource (11,2705 t) in 2018. Dolnet gear contributes nearly 95% of the total landings of the resource in the region. The landings and the corresponding catch per unit effort (CPUE) showed a fluctuating trend over the study period of 1994-2014. The catches fluctuated between 35,235 t (2016) and 92,188 t (2004), whereas the CPUE oscillated in the range of 15 to 20 kg h-1 (1998) and 30.76 kg h-1 (2003). The period of 1994-2000 was the most productive period with an average catch of 72,133 t, whereas the succeeding decade was the leanest phase with an average annual catch of 50,035 t. The estimated potential yield (= maximum sustainable yield, MSY) was estimated at 73,700 t and 70,108 t using the Bayesian surplus production model (CMSY & BSM) and basic Schaefer surplus production model respectively. The present catch and exploitation levels were found to be close to the optimum level and a further increase in effort for the resource is not recommended.

scholarly journals Stock assessment of Bombayduck Harpodon nehereus (Hamilton, 1822) from Gujarat coast using non-equilibrium production model

2017 ◽  
Vol 64 ◽  
Author(s):  
K. Mohammed Koya ◽  
K. R. Sreenath ◽  
M. Muktha ◽  
Gyanranjan Dash ◽  
Swathipriyanka Sen ◽  
...  
Keyword(s):  
Stock Assessment ◽  
Northern Region ◽  
Maximum Sustainable Yield ◽  
Production Model ◽  
Catch Per Unit Effort ◽  
Surplus Production ◽  
Surplus Production Model ◽  
Gujarat Coast ◽  
Model Approach ◽  
Non Equilibrium

Bombayduck Harpodon nehereus, harvested mainly by dol nets (stationary bag nets), has been a prolific fishery in the northern region of Arabian Sea and Bay of Bengal. Biomass and maximum sustainable yield (MSY) estimates for the Bombayduck stock in the Saurashtra region were obtained from a non-equilibrium surplus production model approach utilising catch per unit effort (CPUE) time series derived from fish landing data. Fox model was found to be the most appropriate defining model and the results demonstrated that the stock is currently being overexploited.

scholarly journals Penentuan Status Pemanfaatan dan Pengelolaan Ikan Tongkol (Auxis rochei) yang Tertangkap di Perairan Bolaang-Mongondow Selatan dan Bolaang-Mongondow Timur Sulawesi Utara

d'CARTESIAN ◽  
2020 ◽  
Vol 9 (1) ◽  
pp. 1
Author(s):  
Ladi Beatriex Deeng ◽  
Hanny A H Komalig ◽  
John S Kekenusa
Keyword(s):  
Maximum Sustainable Yield ◽  
Production Model ◽  
Model Data ◽  
Biological Resource ◽  
Surplus Production ◽  
North Sulawesi ◽  
Surplus Production Model ◽  
The Status ◽  
Level Of Effort

LADI BEATRIEX DEENG. Determination of Utilization and Management Status of Bonito (Auxis Rochei) Caught in South Bolaang-Mongondow and East Bolaang-Mongondow Waters of North Sulawesi. Supervised by Mr. JOHN S. KEKENUSA as main supervisor, and Mr. HANNY A. H. KOMALIG as co-supervisor.Bonito (Auxis rochei), needs to be managed properly because even though it is a renewable biological resource, it can experience overfishing, depletion or extinction. One way to approach the management of fish resources is by modeling. The analysis was carried out aiming to determine the status of utilization and management of bonito and maximum sustainable yield (MSY) using the Surplus Production Model. Data on catching and efforts to catch bonito is collected from the Marine and Fisheries Service of South Bolaang-Mongondow Regency and East Bolaang-Mongondow of North Sulawesi. The surplus production model that can be used to determine the catch of bonito is the Schaefer model. The maximum sustainable catch of bonito is 869.556 tons per year, obtained at the level of catching effort of 933 trips. For 2017 the level of utilization is 64.95 % so that production can still be increased, with a level of effort of 73.74 % indicating the level of effort that is not optimal and can still be increased. Keywords : Bonito, Surplus Production Model, South Bolaang-Mongondow and   East Bolaang-Mongondow Regency

scholarly journals ANALISIS STATUS PEMANFAATAN SUMBER DAYA IKAN SEBAGAI DASAR PENGELOLAAN PERIKANAN TANGKAP BERKELANJUTAN DI WILAYAH PERAIRAN CIREBON

2017 ◽  
Vol 3 (2) ◽  
pp. 145
Author(s):  
Pigoselpi Anas ◽  
Luky Adrianto ◽  
Ismudi Muchsin ◽  
Arief Satria
Keyword(s):  
The State ◽  
Production Model ◽  
Purse Seine ◽  
Optimum Number ◽  
Marine Waters ◽  
Gill Nets ◽  
Surplus Production ◽  
Fisheries Resources ◽  
Surplus Production Model ◽  
Fishing Gears

Pada dasarnya pengelolaan perikanan tangkap bertujuan untuk mewujudkan usaha perikanan tangkap yang berkelanjutan. Untuk itu, laju penangkapan ikan harus tidak melebihi potensi produksi lestari (Maximum SustainbleYield, MSY) dari sumber daya ikan dalam suatu wilayah perairan. Namun, pengelola perikanan di Indonesia umumnya berpandangan, bahwa menentukan MSY dan hasil tangkapan ikan di laut susah dan mahal. Dengan metode Surplus Production Model, penelitian ini dimaksudkan untuk mengetahui status pemanfaatan sumber daya ikan berdasarkan pada jenis alat tangkap, zona penangkapan ikan, dan jenis ikan secara lebih mudah dan murah di wilayah perairan laut Kabupaten Cirebon. Penelitian dilakukan dari Oktober 2010 sampai Maret 2011. Hasil penelitian menunjukkan, bahwa status pemanfaatan sumber daya ikan baik di Zona-I, Zona- II maupun Zona-III perairan laut Cirebon pada umumnya telah mengalami gejala tangkap lebih (overfishing). Dari 13 jenis alat tangkap yang digunakan oleh nelayan di daerah penelitian, tujuh diantaranya yakni payang, dogol, pukat arad, jaring insang hanyut, jaring insang lingkar, bagan tancap, dan rawai tetap statusnya sudah melebihi dari jumlah upaya optimum (fopt). Sedangkan, enam jenis alat tangkap lainnya, yaitu pukat tarik, jaring insang tetap, jaring kantong, anco, perangkap kerang, dan perangkap lainnya statusnya masih kurang. Adapun jenis-jenis ikan yang telah mengalami overfishing adalah: teri, teri nasi, bawal hitam, sunglir, gurita, biji nangka, kapas-kapas, slanget, sotong, kurisi, kuniran, peperek, kurau, ikan sebelah, cumi-cumi, manyung, tetengkek, bawal putih, talang, kakap, tongkol, tenggiri, cucut, japuh, tembang, julung-julung, siro, bilis, pari, alu-alu, dan remang.Management of capture fisheries is basically intended to achieve economic activities of capture fisheries on a sustainable basis. Accordingly, the exploitation rate of fisheries resources should not exceed its MSY (Maximum Sustainable Yield) in a marine area. Unfortunately, majority of fisheries management authorities in Indonesia perceive that determining MSY and total fish catch in marine waters is both difficult and expensive. By employing Surplus Production Model, this research aims at evaluating the state of fisheries resource utilization based upon the types of fishing gears, fishing zones, and types of fish stocks in Cirebon marine waters, which is easier and less expensive than it is currently perceived by those management authorities. The results of this research demonstrate that the state of fisheries resources in Zone-I, Zone-II, and Zone-III of Cirebon marine waters has generally been overfishing. Furthermore, among 13 types of fishing gears used in Cirebon marine waters, seven fishing gears are already exceeding the optimum fishing effort (fopt). These include mini purse seine, danish seine, fish net, gill nets, encirling gill nets, fixed lift net, and long lines. Meanwhile, the other six fishing gears including active purse seine, fixed gill nets, trammel nets, anco, trap for molluscs, and other trap types are still less than their optimum number. Amongst so many fish species caught from Cirebon marine waters, thirty one specieas are already overfishing, which include teri, teri nasi, bawal hitam, sunglir, gurita, biji nangka, kapas-kapas, slanget, sotong, kurisi, kuniran, peperek, kurau, ikan sebelah, cumicumi, manyung, tetengkek, bawal putih, talang, kakap, tongkol, tenggiri, cucut, japuh, tembang, julung-julung, siro, bilis, pari, alu-alu, dan remang.

scholarly journals UPAYA MEMBANGUN KEMBALI DAN PEMULIHAN STOK IKAN PELAGIS KECIL DI LAUT JAWA

2019 ◽  
Vol 25 (3) ◽  
pp. 179
Author(s):  
Suherman Banon Atmaja ◽  
Duto Nugroho
Keyword(s):  
Direct Reduction ◽  
Production Model ◽  
Purse Seine ◽  
North Coast ◽  
Fish Stocks ◽  
Surplus Production ◽  
Stock Status ◽  
Surplus Production Model ◽  
The Status ◽  
Stock Recovery

Tujuan utama makalah ini adalah mengevaluasi kondisi  stok ikan pelagis kecil (dengan ikan layang Decapterus spp. sebagai acuan) sebagai pembangkit ekonomi di pantai Utara Jawa perairan laut Jawa WPPNRI 712. Analisis dilakukan sejalan dengan tren penurunan aktivitas penangkapan kapal pukat cincin yang berpangkalan di Pekalongan Jawa Tengah yang telah berlangsung selama hampir dua dekade. Teori klasik tentang penangkapan ikan mengisyaratkan bahwa pemulihan populasi ikan dapat berlangsung cepat jika penangkapan ikan dihentikan pada rentang waktu tertentu.  Analisis menggunakan pendekatan surplus produksi non-ekuilibrium dengan bantuan perangkat aplikasi ASPIC 7 dan Kobe plot digunakan untuk  memetakan perubahan arah status stok ikan pelagis kecil yang berkaitan langsung dengan perilaku perkembangan perikanan pukat cincin di laut Jawa pada kurun waktu 1976 - 2014.  Hasil penelitian menunjukkan bahwa penurunan drastis baik jumlah armada pukat cincin maupun aktivitas penangkapannya akibat rendahnya peluang keberhasilan dan tingginya investasi operasional hampir dua dekade  telah telah memberikan peluang terhadap pemulihan stok secara alamiah menuju tingkat biomassa optimal.  Pergerakan status biomasa dan mortalitas penangkapan ikan pelagis kecil secara tahunan yang ditampilkan melalui penggunaan Kobe plot memberikan indikasi bahwa kondisi stok ikan setelah tahun 2015 mengarah pada status yang cenderung baik. The main objective of this paper is to evaluate the status and trend of small pelagic fish stocks (Decapterus spp.) as a major driver of economics in north coast of Java correspond to a direct reduction of purse seine fishing activities at around two decades. Classical theory of fishing suggests that rapid population recovery occurs when fishing pressures is reduced. These phenomenons were analyzed by applying non-equilibrium surplus production model incorporate covariance of the programs package of Aspic 7.  Simple Kobe plots were also applied to track the annual trend of stock status directly which presumably related to the course of fisheries development.  The results showed that drastic decline of fishing pressures of both number of purse seine fleet and their activity within the last decade provided an opportunity of stock recovery at optimum biomass levels. Applying simple Kobe plots indicates the stock status and trend in 2015 relatively in rebuilding condition

scholarly journals STATUS PEMANFAATAN IKAN CAKALANG (Katsuwonus pelamis) DI PERAIRAN KABUPATEN LUWU SULAWESI SELATAN

2019 ◽  
Vol 2 (2) ◽  
pp. 216-228
Author(s):  
Muhammad Jamal Alwi ◽  
Hasrun Abdullah ◽  
Ernaningsih Aras
Keyword(s):  
Fishing Effort ◽  
Maximum Sustainable Yield ◽  
Production Model ◽  
Sustainable Yield ◽  
Skipjack Tuna ◽  
Katsuwonus Pelamis ◽  
Surplus Production ◽  
Fish Resources ◽  
Yield Value ◽  
Surplus Production Model

Skipjack tuna (Katsuwonus pelamis), should be managed properly because even though it is renewable, natural resources can be depleted. One approach in managing fish resources is by modeling. The purpose of this study is to determine the maximum sustainable yield, the level of utilization and effort of skipjack tuna. Data on catches as well as catch efforts of skipjack tuna were collected from 9 fisheries year books of Luwu Kabupaten (District). The surplus production model used is the Schaefer, Fox, Walter & Hilborn model. Schaefer model obtained by MSY = 1541.08 tons and Fopt = 243 trips; Fox model obtained maximum sustainable yield value (YMSY) of 1602,244 tons, maximum sustainable fishing effort (fMSY) of 303 units and maximum sustainable CpUE value (UMSY) of 5.29 tons trip-1; the Walter & Hilborn model found potential stocks of sustainable reserves (Be) skipjack in Luwu district amounted to 935.72 tons year-1. Utilization rates of the skpjack tuina indicate the fish is still under exploitation.

scholarly journals Marine Sustainable Yield Analysis of Pelagic Fisheries in Sea Based on Catch Landing data From Tumumpa Fishery Harber, Manado North Sulawesi

2017 ◽  
Vol 6 (1) ◽  
pp. 21
Author(s):  
David Y Rumambi ◽  
Unstain N. W. J. Rembet ◽  
Joudy R. R. Sangari
Keyword(s):  
Fishing Effort ◽  
Maximum Sustainable Yield ◽  
Pelagic Fish ◽  
Production Model ◽  
Sustainable Yield ◽  
Research Activity ◽  
Fish Stocks ◽  
Surplus Production ◽  
North Sulawesi ◽  
Surplus Production Model

This research activity took place in Manado City, North Sulawesi Province with activities centered on the Tumumpa Fishery Harbor (PPP). The data were recorded from capture fisheries activity conducted in the Sulawesi Sea and its surroundings landed in the Tumumpa Fishery Harbor. The purpose of this study was to analyze the stock value and Maximum Sustainable Yield (MSY) of pelagic fish in the Sulawesi Sea based on the approach of the surplus production model (Model Schaefer). This research is expected to be used as a consideration in the management of pelagic fish stocks in the Sulawesi Sea, and can be used as a basis for further research. This research uses secondary data collection method in the form of statistical document and record available. The data taken, including fish catch and fishing effort or effort (trip), from 2012 to 2016 (5 years). The results show that production value is inversely proportional to the value of effort, where the value of production from 2012 to 2016 has decreased every year, while the value of effort from 2012 to 2016 has increased. This condition indicates that the presence of pelagic fish stocks in the Sulawesi Sea and surrounding areas has been and is experiencing a decline that impacts on the decrease of production every year with a large percentage and this condition also indicates the occurrence of potentially overfishing. The value of MSY utilization of capture fishery resources in the Sulawesi Sea based on Tumumpa Fishery Harbor data were 16,305.45 tons / year for HMSY and 1,664,59 trips / year for EMSY, with TAC of 13,044.36 tons / year.Keywords :  Capture fishery, MSY, Pelagic, Surplus Production Model, Tumumpa ABSTRAK Kegiatan penelitian ini berlangsung di Kota Manado, Provinsi Sulawesi Utara dengan kegiatan berpusat di Pelabuhan Perikanan Pantai (PPP) Tumumpa Manado. Aktivitas perikanan tangkap yang ditelaah berlangsung di kawasan perairan Laut Sulawesi dan sekitarnya berdasarkan data PPP Tumumpa Manado. Tujuan dari penelitian ini adalah untuk menganalisis nilai stok dan Maximum Sustainable Yield (MSY) ikan pelagis di Laut Sulawesi berdasarkan pendekatan model produksi surplus (Model Schaefer). Penelitan ini diharapkan dapat digunakan sebagai bahan pertimbangan dalam pengelolaan stok ikan pelagis di Laut Sulawesi dan sekitarnya, serta dapat digunakan sebagai dasar untuk penelitian selanjutnya. Penelitian ini menggunakan metode pengumpulan data sekunder berbentuk dokumen. Data yang diambil adalah data tangkapan ikan dan upaya penangkapan ikan atau effort (trip), dari tahun 2012 sampai dengan 2016 (5 Tahun). Hasil penelitian menunjukkan nilai produksi berbanding terbalik dengan nilai effort, di mana nilai produksi dari tahun 2012 sampai 2016 mengalami penurunan setiap tahunnya, sedangkan nilai effort dari tahun 2012 sampai tahun 2016 mengalami peningkatan. Kondisi yang terjadi ini mengindikasikan bahwa keberadaan stok ikan pelagis di Laut Sulawesi dan sekitarnya telah dan sedang mengalami penurunan yang berdampak pada penurunan produksi setiap tahun dengan persentase yang cukup besar di mana kondisi ini mengindikasikan terjadinya overfishing. Nilai MSY pemanfaatan sumber daya perikanan tangkap di Laut Sulawesi berdasarkan data PPP Tumumpa Manado sebesar 16.305,45 ton/tahun untuk HMSY, dan 1.664,59 trip/tahun untuk EMSY, dengan TAC sebesar 13.044,36 ton/tahun.Kata Kunci: Perikanan Tangkap, MSY, Pelagis, Model Produksi Surplus, Tumumpa

scholarly journals PENENTUAN STATUS PEMANFAATAN DAN SKENARIO PENGELOLAAN IKAN CAKALANG (Katsuwonus pelamis) YANG TERTANGKAP DI PERAIRAN BOLAANG-MONGONDOW SULAWESI UTARA

2014 ◽  
Vol 14 (1) ◽  
pp. 9 ◽  
Author(s):  
John S Kekenusa ◽  
Victor N.R Watung ◽  
Djoni Hatidja
Keyword(s):  
Maximum Sustainable Yield ◽  
Production Model ◽  
Sustainable Yield ◽  
Potential Yield ◽  
Katsuwonus Pelamis ◽  
Effort Level ◽  
Surplus Production ◽  
North Sulawesi ◽  
Surplus Production Model ◽  
The Status

PENENTUAN STATUS PEMANFAATAN DAN SKENARIO PENGELOLAANIKAN CAKALANG (Katsuwonus pelamis) YANG TERTANGKAP DI PERAIRANBOLAANG-MONGONDOW SULAWESI UTARAABSTRAKIkan Cakalang (Katsuwonus pelamis L.), perlu dikelola dengan baik sebagai sumber daya alam terbarukan, tetapi semakin habis atau punah. Salah satu pendekatan dalam pengelolaan sumberdaya ikan adalah dengan pemodelan. Analisis dilakukan, bertujuan untuk mendapatkan model terbaik untuk model surplus produksi adalah Maximum Sustainable Yield (MSY), dan untuk mendapatkan pemanfaatan cakalang dan tingkat usaha. Data yang digunakan untuk model produksi surplus dikumpulkan dari data hasil tangkapan cakalang yang disediakan oleh Dinas Kelautan Dan Perikanan Kabupaten Bolaang Mongondow Provinsi Sulawesi Utara. Model terbaik Surplus Produksi dapat digunakan untuk menilai potensi hasil cakalang adalah  model Fox. Upaya optimal per tahun secara biologi EMSY adalah 3.876 perjalanan. Hasil optimal secara biologi CMSY 1,505.00 ton per tahun. Tingkat pemanfaatan untuk tahun 2005 adalah 124,48%, dengan tingkat usaha 110,96%. Hasil tangkapan untuk tahun 2005 sudah di atas nilai MSY, yang menunjukkan overfishingKata kunci: ikan cakalang, Model surplus produksi, Maksimum Sustainable Yield,Bolaang MonogndowDETERMINATION OF THE STATUS OF UTILIZATION AND MANAGEMENTSCENARIOS SKIPJACK (Katsuwonus pelamis L.) CAUGHT IN THEBOLAANG MONGONDOW BEACH, NORTH SULAWESIABSTRACTSkipjack (Katsuwonus pelamis L.), needs to be managed well as a renewable natural resources, but vunerable to depletion or extinction. One approach in fish resource management is by modeling. Analysis were carried out, aimed to get the best model for surplus production model, to assess the Maximum Sustainable Yield (MSY), and to get the skipjack utilization and effort level. Data used for surplus production model were collected from skipjack landings data provided by Marine and Fisheries Service (Dinas Kelautan dan Perikanan) of Bolaang-Mongondow Regency and North Sulawesi Province. The best Surplus Production Model that can be used to assess the skipjack potential yield is the Fox model. The optimum effort per year biologically EMSY is 3,876 trips. The optimum yield biologically CMSY is 1,505.00 tons per year. Utilization level for 2005 was 124.48 %, with effort level 110.96 %. The catch for 2005 had already above the MSY value, which shows an overfishing.Keywords : Skipjack, Surplus Production Model, Maximum Sustainable Yield, Bolaang Mongondow

scholarly journals PENENTUAN STATUS PEMANFAATAN DAN SKENARIO PENGELOLAAN IKAN TONGKOL (Auxis rochei) YANG TERTANGKAP DI PERAIRAN KABUPATEN SIAU-TAGULANDANG-BIARO SULAWESI UTARA

2014 ◽  
Vol 14 (2) ◽  
pp. 136
Author(s):  
John S. Kekenusa ◽  
Sendy B. Rondonuwu ◽  
Marline S. Paendong ◽  
Winsy Ch.D. Weku
Keyword(s):  
Maximum Sustainable Yield ◽  
Production Model ◽  
Sustainable Yield ◽  
Management Scenarios ◽  
Potential Yield ◽  
Effort Level ◽  
Surplus Production ◽  
North Sulawesi ◽  
Surplus Production Model ◽  
The Status

ABSTRAK Ikan tongkol (Auxis rochei), perlu dikelola dengan baik karena walaupun sebagai sumberdaya alam terbarukan, namun dapat mengalami deplesi ataupun kepunahan. Salah satu pendekatan dalam pengelolaan sumberdaya ikan ialah dengan pemodelan. Analisis dilakukan bertujuan untuk mendapatkan model terbaik untuk model produksi surplus guna mengetahui tangkapan maksimum lestari (MSY), tingkat pemanfaatan, dan pengupayaan ikan tongkol. Data hasil tangkapan dan upaya tangkap ikan tongkol dikumpulkan dari Dinas Kelautan dan Perikanan Kabupaten Siau-Tagulandang-Biaro dan Dinas Kelautan dan Perikanan Provinsi Sulawesi Utara Sulawesi. Model Produksi Surplus terbaik, yang digunakan untuk menilai potensi ikan tongkol ialah model Schaefer. Upaya optimal (EMSY)sebesar 5436 trip per tahun. Hasil tangkapan optimal CMSY sebesar 1040,94 ton per tahun. Tingkat pemanfaatan untuk tahun 2013 ialah 103,80 %, dengan tingkat pengusahaan sebesar 110,56 %, yang menunjukkan terjadi tangkap-lebih (overfishing). Kata Kunci : Ikan  tongkol, Model Produksi Surplus,Tangkapan Maksimum Lestari, Siau-Tagulandang-Biaro DETERMINATION OF THE STATUS OF UTILIZATION AND MANAGEMENT SCENARIOS BONITO (Auxis rochei) CAUGHT IN THE SIAU-TAGULANDANG-BIARO REGENCY NORTH SULAWESI ABSTRACT Bonito (Auxis rochei), needs to be  managed well as a renewable natural resources, but vunerable to depletion or extinction. One approach in fish resource management is by modeling. Analysis were carried out, aimed to get the best model for surplus production model, to assess the Maximum Sustainable Yield (MSY), and to get the bonito utilization and effort level. Data used for surplus production model were collected from bonito landings data provided by Marine and Fisheries Service (Dinas Kelautan dan Perikanan) of  Siau-Tagulandang-Biaro Regency and North Sulawesi Province. The best Surplus Production Model that can be used to assess the bonito potential yield is the Schaefer model. The optimum effort biologically EMSY is 5,436 trips per year. The optimum yield biologically CMSY is 1,040.94 tons per year. Utilization level for 2013 was103.80 %, with effort level 110.56 %. The catch for 2013 had already above the MSY value, which shows an  overfishing. Keywords : Bonito, Surplus Production Model, Maximum Sustainable Yield, Siau-Tagulandang-Biaro

scholarly journals STATUS STOK GENUS Rastrelliger spp. SEBAGAI DASAR PENGELOLAAN PERIKANAN (STUDI KASUS PERAIRAN SELAT SUNDA)

2016 ◽  
Vol 18 (2) ◽  
pp. 73
Author(s):  
Wulandari Sarasati ◽  
Mennofatria Boer ◽  
Sulistiono Sulistiono
Keyword(s):  
Maximum Sustainable Yield ◽  
Production Model ◽  
Sustainable Yield ◽  
Growth Coefficient ◽  
Surplus Production ◽  
Stock Status ◽  
Surplus Production Model ◽  
Exploitation Rate ◽  
Two Peaks ◽  
Recruitment Period

The Rastrelliger spp. is one of the important commodities of the Sunda Strait. This research aimsto analyze the stock status of Rastrelliger spp. Including R. faughni, R. kanagurta and R. brachysoma in Sunda Strait that landed at the Fishery Harbor (PPP) Labuan, Banten. The sampling was conducted in April-August 2015. The data was collected using Random stratified sampling based on the fish size, small, medium and large. The length of the sample was measured and classified into male and female. The data were analyzed using FISAT II ELEFAN I software to present the stock with growth, recruitment, surplus production model, and mortality and rate of exploitation parameters. The results show that R. faughni has L∞ values for females and males respectively of 264.00 mm and 288.69 mm, 293.09 mm and 330.24 mm R. kanagurta and R. brachysoma 272.04 mm and 286.42. Growth Performs Index (GPI) on R. faughni of 4.2758, R. kanagurta of 4.1673, and on R. brachysoma of 4.2076. The growth coefficient of female and male R. faughni was 0.22 and 0.16, R. kanagurta of 0.24 and 0.10, and R. brachysoma 0.20 and 0.13. The level of recruitment of each varies but overall undergoes two peaks during the recruitment period. Maximum Sustainable Yield (MSY) for the Rastrelliger spp. 1,919.02 tons and FMSY (Effort MSY) for 16,766 trips. Furthermore, the mortality rate of arrest (F) R. faughni amounted to 14.53, R. kanagurta 9.43, and R. brachysoma 1.74. The estimation of stock status has never been detached from the exploitation rate. The rate of exploitation for R. faughni, and that is equal to 0.98, R. kanagurta of 0.98, and R. brachysoma 0.85. Judging from the rate of exploitation can be expected the three fish of the Rastrelliger spp. In the Sunda Strait has been over exploited because it has exceeded the limits of optimum exploitation rate.

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