scholarly journals EXPLOITATION AND CPUE TREND OF THE SMALL PELAGIC FISHERIES IN THE SULAWESI SEA, INDONESIA

2012 ◽  
Vol 18 (2) ◽  
pp. 63
Author(s):  
Lilis Sadiyah ◽  
Purwanto Purwanto ◽  
Andhika P. Prasetyo
Keyword(s):  
General Pattern ◽  
Pelagic Fish ◽  
Fish Stock ◽  
Yield Model ◽  
Small Pelagic Fish ◽  
Fish Stocks ◽  
Increasing Trend ◽  
The Status ◽  
Expected Benefits ◽  
Pelagic Fisheries

One of the expected benefits of the Sulu-Celebes Sea Project during its implementation is to have increased fish stocks at demonstration sites, as indicated by the Catch per Unit of Effort (CPUE). Analysis of catch and effort data of the small pelagic fisheries by using the surplus yield model was done to obtain information on the likely trend of CPUE for the last ten years. By using the pajeko as the standardized fishing gear the trend of CPUE has been calculated. Between 2000-2005, the trend of production (catch), effort and CPUE followed the general pattern of the exploited fisheries that already fully exploited, where the increasing trend of effort was not followed by the increasing catch. On the other hand, the trend of CPUE is decreased. In the following years, the trend of both catch and CPUE do not follow the general pattern of the exploited fisheries. The trend of catch, effort and CPUE has likely been stable, indicating that the fishery in this period has been leveled-off. The status of exploitation of the small pelagic fish resources in the Indonesian Sulawesi Sea is demermined by the MSY level that has likely been surpassed during the period 2003-2004. Therefore with the increasing effort in the following year the trend of catch was relatively stable. It is likely that the small pelagic fish stock in the Indonesian Sulawesi Sea might be ‘fully exploited’.

scholarly journals PENILAIAN STATUS STOK DAN RISIKO EKSPLOITASI PERIKANAN PELAGIS KECIL YANG BERBASIS DI PPI SARANG, REMBANG, JAWA TENGAH

2020 ◽  
Vol 26 (4) ◽  
pp. 189
Author(s):  
Achmad Zamroni ◽  
Heri Widiyastuti ◽  
Suwarso Suwarso
Keyword(s):  
Risk Estimation ◽  
Reference Value ◽  
Maximum Sustainable Yield ◽  
Risk Level ◽  
Fish Stocks ◽  
The Status ◽  
Equilibrium Data ◽  
Java Sea ◽  
Pelagic Fisheries ◽  
Non Equilibrium

Peningkatan strategi pengelolaan perikanan pelagis kecil terutama di perairan Laut Jawa tidak hanya dengan menilai stok ikan dan perikanannya, akan tetapi diperlukan juga menilai risiko dampak dari pengelolaan. Dalam tulisan ini disebutkan status estimasi stok dan risiko yang melebihi hasil tangkapan maksimum yang berkelanjutan/Maximum Sustainable Yieald (MSY) terkait dengan nilai referensi terhadap beberapa tingkat tangkapan alternatif yang dihasilkan dari penilaian stok dan risiko penangkapan. Analisis yang digunakan adalah model dinamika biomassa ikan dengan metode non-equilibrium. Data yang digunakan berasal dari PPI Sarang, Rembang yang merupakan basis perikanan pelagis kecil terbesar di Laut Jawa selain Pekalongan. Hasil analisis menunjukkan bahwa nilai MSY yang diperoleh adalah 13.820 ton yang dihasilkan dari upaya penangkapan sekitar 1.759 trip kapal pukat cincin mini. Jika pemanfaatan perikanan sesuai dengan kondisi saat ini, maka estimasi nilai risiko akan berada pada tingkat risiko tinggi, begitu juga jika tingkat pemanfaatan berada pada nilai MSY nya. Nilai risiko akan turun menjadi sedang-tinggi jika pemanfaatan dikurangi 10% - 20% dari kondisi saat ini. Jika tingkat pemanfaatan dikurangi 30% atau lebih, maka nilai risiko dalam 10 tahun berikutnya akan berada pada kondisi sedang-rendah.Improving the management strategy of small pelagic fisheries, especially in the waters of the Java Sea, not only by assessing fish stocks and fisheries, but also needs to determine the risk of management impacts. In this paper, it is stated that the status of stock and risk estimation that exceeds the Maximum Sustainable Yield (MSY) is related to the reference value in several alternative catch levels resulting from stock and risk assessment. The analysis used is a fish biomass dynamics model with a non-equilibrium method. The data used was from TPI Sarang in Rembang, which is one of the largest small pelagic fisheries bases in the Java Sea. Results show that the MSY value obtained is 13,820 tons resulting from the capture effort of approximately 1,759 mini purse seine trips. Suppose the fishery utilization is in accordance with the current conditions, in that case, the estimated risk value will be at a high-risk level, and also if the utilization level is at the MSY value. The risk value will decrease to moderate-high if utilization is reduced by 10% - 20% from the current condition. If the utilization level is reduced by 30% or more, the next ten-year risk value will be in the medium-low condition.

scholarly journals DISTRIBUSI DAN POTENSI SUMBER DAYA IKAN PELAGIS DI WILAYAH PENGELOLAAN PERIKANAN NEGARA REPUBLIK INDONESIA 573 (WPP NRI 573) SAMUDERA HINDIA

2017 ◽  
Vol 23 (1) ◽  
pp. 47
Author(s):  
Asep Ma'mun ◽  
Asep Priatna ◽  
Thomas Hidayat ◽  
Nurulludin Nurulludin
Keyword(s):  
Indian Ocean ◽  
Distribution Pattern ◽  
Sustainable Management ◽  
Acoustic Method ◽  
Pelagic Fish ◽  
Small Pelagic Fish ◽  
Fish Size ◽  
Fish Resources ◽  
Needed Information ◽  
Pelagic Fisheries

Pengelolaan perikanan tangkap yang lestari membutuhkan informasi potensi dan pola penyebaran sumber daya ikan yang dimanfaatkan. Penelitian ini bertujuan untuk mengetahui distribusi dan potensi sumber daya ikan pelagis di WPP NRI 573 (perairan Samudera Hindia) dengan metode akustik. Hasil penelitian menunjukan, penyebaran densitas cukup tinggi untuk ikan pelagis ditemukan di perairan selatan Pangandaran hingga wilayah Jogjakarta. Sumber daya ikan pelagis kecil yang terdeteksi didominasi oleh ukuran ikan dengan kisaran panjang antara 25-28 cm dan ikan pelagis besar di dominasi oleh ukuran ikan 28-31 cm. Nilai rata-rata kepadatan stok untuk ikan pelagis kecil 0,041 ton/km2 dan ikan pelagis besar sebesar 0,14 ton/ km2. Potensi lestari ikan pelagis kecil sebesar 292.092 ton/tahun dan ikan pelagis besar sebesar 505.941 ton/tahun. Nilai tersebut dapat dijadikan dasar dalam upaya pengelolaan dan pemanfaatan perikanan pelagis.The sustainable management is needed information on the stock and distribution pattern of fish.This study aims to determine distribution and potential of fish resources especially for pelagic species in FMA 573 (Indian Ocean) by using acoustic method. Result of research indicated that, high density for pelagic fish found in south Pangandaran to Jogjakarta. The results obtained also that, the detected small pelagic fish were dominated by the fish size ranged between 25-28 cm and large pelagic fish was dominated by fish size of 28-31cm.The average of the stock density for small pelagic fish was 0,041 ton/km2 and large pelagic fish of 0.14 ton/km2.The sustainable potential of the small pelagic fish amounted to 292.092 ton/year and the large pelagic fish amounted to 505.941 ton/year. These values can be used as the basic management and utilization of pelagic fisheries in the waters region.

scholarly journals Interaction between small pelagic purse seine fishery and its top predators

2018 ◽  
Vol 59 (2) ◽  
pp. 185-190
Author(s):  
Barbara Zorica ◽  
Vanja Čikeš Keč ◽  
Kristijan Zanki ◽  
Leon Grubišić ◽  
Tanja Šegvić-Bubić
Keyword(s):  
Preliminary Data ◽  
Negative Impact ◽  
Pelagic Fish ◽  
Purse Seine ◽  
Small Pelagic Fish ◽  
Fish Schools ◽  
Top Predators ◽  
Increasing Trend ◽  
Monthly Pattern ◽  
Purse Seine Fishery

Due to very good collaboration with one commercial purse seiner, using “Srdelara” and operating in fishing zone G, preliminary data concerning the interaction between small pelagic purse seine fishery and its predators were obtained. According to the notes taken by experience observer on-board in period from year 2013 to 2016, seems that tunas, dolphins and swordfish were the faithful companions of purse seiner fisherman with abundance of 68.6%, 22.0% and 9.4%, respectively. Although they were present all year round, their monthly pattern of appearance indicated that less tunas were recorded in May-June, more dolphins were noted from July to October while swordfish were mostly abundant in winter (January-March). Within the investigated period, slightly increasing trend of tuna and dolphins’ appearance was recorded, although statistically not significant. Analysing possible correlation between purse seine catches and predator’s abundances, revealed that appearance of tuna had negative impact on the catches (dispersion of schools), while realised catches in presence of dolphins were quite good so it seems that they tend to round up small pelagic fish schools.

Variations in productivity of the Canary Current Large Marine Ecosystem and their effects on small pelagic fish stocks

2016 ◽  
Vol 17 ◽  
pp. 105-117 ◽  
Author(s):  
Birane Sambe ◽  
Merete Tandstad ◽  
Ana Maria Caramelo ◽  
Bradford E. Brown
Keyword(s):  
Marine Ecosystem ◽  
Pelagic Fish ◽  
Small Pelagic Fish ◽  
Fish Stocks ◽  
Large Marine Ecosystem

scholarly journals Evidence of a variable “unsampled” pelagic fish biomass in shallow water (<20 m): the case of the Gulf of Lion

2006 ◽  
Vol 63 (3) ◽  
pp. 444-451 ◽  
Author(s):  
P. Brehmer ◽  
J. Guillard ◽  
Y. Guennégan ◽  
J.L. Bigot ◽  
B. Liorzou
Keyword(s):  
Time Series ◽  
Population Dynamics ◽  
Shallow Water ◽  
Pelagic Fish ◽  
Fish Density ◽  
Fish Biomass ◽  
Small Pelagic Fish ◽  
Fish Stocks ◽  
Gulf Of Lion ◽  
Bottom Depth

Abstract Studies of small pelagic fish biomass are limited by the fact that research vessels and fishing boats are usually restricted to working areas with a bottom depth >20 m. Consequently, “unsampled” areas can represent a large proportion of the continental shelf, and the biomass in those areas can be important and must be taken into account in assessment methods in order to avoid misleading interpretations in population dynamics. A time-series ten years long has been compiled from acoustic-assessment surveys of small pelagic fish stocks, and the results show an overall increase in the acoustic fish density towards the coast, where values were the highest. Additional experiments on transects covering shallow-water areas (5–20 m) were conducted from 2001 to 2003 with small boats and a research vessel to evaluate the acoustic fish density in those areas. The results confirmed that the fish biomass in shallow water is significant, sometimes very large, and should be evaluated to avoid underestimation. Therefore, surveys should be conducted in shallow water, if at all possible, as well as at greater depths when carrying out surveys destined to support assessment exercises.

scholarly journals RESPONSIBLE FISHERIES MANAGEMENT OF MINI PURSE SEINE IN THE LAMPUNG BAY AREA

2017 ◽  
Vol 8 (2) ◽  
pp. 713-728
Author(s):  
Yulia Estmirar Tanjov ◽  
Roza Yusfiandayani ◽  
. Mustaruddin
Keyword(s):  
Fishing Effort ◽  
Maximum Sustainable Yield ◽  
Pelagic Fish ◽  
Purse Seine ◽  
Sustainable Yield ◽  
Catch Per Unit Effort ◽  
Small Pelagic Fish ◽  
Bay Area ◽  
Fisheries Resources ◽  
The Status

Lempasing is a Coastal Fishing Port (CFP) which located in Bandar Lampung. It is one of the centers of fisheries activities in the city. One of the fishing gear which operated by most of fishermen in Lempasing is mini purse seine. Mini purse seine fishing activities in the Lampung Bay Area and Lempasing CFP is not in accordance with the conditions of the surrounding waters area. The research was conducted in the Lampung Bay Area and Lempasing CFP, Lampung. This study aims to: 1) determine the status of fisheries resources utilization, 2) to describe the dominant fish caught by mini purse seine.  Analysis methods were used in this study namely: 1) Fishing Power Index (FPI), Catch Per Unit Effort (CPUE), and Maximum Sustainable Yield (MSY) to determine the status of fisheries resource utilization. The dominant small pelagic fishes caught were scad fish Selaroides sp., mackerel fish Rastrelliger sp., longnose trevally fish Carangoides chrysophrys. The result showed that Fox model was the best fits models with estimated maximum sustainable yield of 15.5 ton and fishing effort of 992 trip/year for mini purse seine. The longnose trevally fish in lampung bay area in do not exceeded the optimal catch fish condition can be used to sustainably. In these condition is necessary to wisely manage and setting the catches to not exceed the allowable catch of the small pelagic fish, so the stock of small pelagic fish in the Lampung Bay Area can be used sustainably.

scholarly journals RESPONSIBLE FISHERIES MANAGEMENT OF MINI PURSE SEINE IN THE LAMPUNG BAY AREA

2017 ◽  
Vol 8 (2) ◽  
pp. 713
Author(s):  
Yulia Estmirar Tanjov ◽  
Roza Yusfiandayani ◽  
. Mustaruddin
Keyword(s):  
Fishing Effort ◽  
Maximum Sustainable Yield ◽  
Pelagic Fish ◽  
Purse Seine ◽  
Sustainable Yield ◽  
Catch Per Unit Effort ◽  
Small Pelagic Fish ◽  
Bay Area ◽  
Fisheries Resources ◽  
The Status

<p><em>Lempasing is a Coastal Fishing Port (CFP) which located in Bandar Lampung. It is one of the centers of fisheries activities in the city. One of the fishing gear which operated by most of fishermen in Lempasing is mini purse seine. Mini purse seine fishing activities in the Lampung Bay Area and Lempasing CFP is not in accordance with the conditions of the surrounding waters area. The research was conducted in the Lampung Bay Area and Lempasing CFP, Lampung. This study aims to: 1) determine the status of fisheries resources utilization, 2)</em><em> to describe the dominant fish caught by mini purse seine. </em><em> Analysis methods were used in this study namely: 1) Fishing Power Index (FPI), Catch Per Unit Effort (CPUE), and Maximum Sustainable Yield (MSY) to determine the status of fisheries resource utilization. The dominant small pelagic fishes caught were scad fish <span style="text-decoration: underline;">Selaroides</span> </em>sp<em>., mackerel fish <span style="text-decoration: underline;">Rastrelliger</span> </em>sp<em>., longnose trevally fish <span style="text-decoration: underline;">Carangoides</span> <span style="text-decoration: underline;">chrysophrys</span>. The result showed that Fox model was the best fits models with estimated maximum sustainable yield of 15.5 ton and fishing effort of 992 trip/year for mini purse seine. The longnose trevally fish in lampung bay area in do not exceeded the optimal catch fish condition can be used to sustainably. In these condition is necessary to wisely manage and setting the catches to not exceed the allowable catch of the small pelagic fish, so the stock of small pelagic fish in the Lampung Bay Area can be used sustainably.</em></p>

scholarly journals ANALISIS STRUKTUR POPULASI TIGA SPECIES LAYANG (Decapterus spp.) DI LAUT JAWA DAN SEKITAR SULAWESI: Saran Pengelolaan Berkelanjutan Ikan Pelagis Kecil dan Evaluasi WPP

2015 ◽  
Vol 6 (2) ◽  
pp. 75
Author(s):  
Suwarso Suwarso ◽  
Achmad Zamroni
Keyword(s):  
Population Structure ◽  
Sustainable Management ◽  
Pelagic Fish ◽  
Management Unit ◽  
Distribution Area ◽  
Small Pelagic Fish ◽  
Management Units ◽  
Java Sea ◽  
Genetic Characters ◽  
Pelagic Fisheries

<p>Dua species ikan layang (<em>Decapterus russelli</em> dan <em>D. macrosoma</em>) merupakan komponen utama dalam perikanan pelagis di Laut Jawa dan Selat Makasar, ikan layang biru/malalugis (<em>D. macarellus</em>) adalah jenis dominan di perairan laut dalam sekitar Sulawesi dan Indonesia timur. Analisis struktur populasi tiga spesies layang tersebut dilaksanakan berdasarkan data struktur populasi (mtDNA) untuk memberikan saran pengelolaan berkelanjutan dan evaluasi WPP (Wilayah Pengelolaan Perikanan). Hasil menunjukkan dari masing-masing dua unit stok tiap species yang terditeksi setiap unit stok/unit biologi yang juga merupakan unit manajemen memiliki sebaran ‘spatial’ yang tidak selalu terbatas di suatu WPP, tetapi sangat dimungkinkan menyebar ‘lintas’ WPP (dua atau lebih WPP) yang umumnya memiliki karakteristik habitat sama; sedangkan keragaman habitat seringkali terlihat dalam satu WPP. Untuk tujuan pengelolaan secara berkelanjutan, pengelolaan sumber daya ikan pelagis kecil disarankan berbasis pada unit manajemen serta meliputi daerah sebaran dari unit manajemen tersebut. Daerah sebaran tersebut mungkin terdapat dalam satu WPP, tetapi seringkali akan meliputi dua atau lebih WPP (lintas WPP). Stok layang (<em>Decapterus russelli</em> dan <em>D. macrosoma</em>) Laut Jawa dan Selat Makasar (dua WPP) disarankan dikelola sebagai satu unit manajemen; sedangkan, stok malalugis yang memiliki ciri genetic sama yang tersebar lintas WPP Selat Makasar (bagian selatan), Teluk Bone, Teluk Tolo, Laut Flores, Laut Banda, Teluk Tomini dan Laut Maluku, disarankan dikelola sebagai satu unit manajemen; unit stok Laut Sulawesi dikelola secara terpisah sebagai unit manajemen yang berbeda. Dalam konteks perikanan layang di Laut Jawa fakta struktur populasinya (kasus D. macrosoma) tidak menunjukkan indikasi migrasi layang dari arah timur (Laut Banda atau Laut Flores) ke arah Laut Jawa seperti dihypotesakan oleh Hardenberg (1938).</p><p> </p><p>Two species of scads (Decapterus russelli and D. macrosoma) is a major component in the pelagic fisheries in the Java Sea and Makassar Strait, the mackerel-scads / malalugis (D. macarellus) is the dominant species around Sulawesi and the eastern waters of Indonesia. Population structure anlyses of those three species of layang was implemented to give a sustainable management<br />options and FMA evaluation, based on the population structure data (mtDNA). Results show from each two stock units by species detected each stock unit / units of biology is a management unit which is have a spatially distribute not only in one WPP/FMA, but it is possible to spread ‘cross’ of FMA (two or more FMA ) which is generally has the same habitat; whereas, the diversity of habitats are often exist. For the purpose of sustainable management, a management of small pelagic fish is recommended based on management units that covers an area of distribution<br />of its management unit. This distribution area may be contained in one FMA, but often will include two or more FMA. Stock of scads (Decapterus russelli and D. macrosoma) in the Java Sea and Makassar Strait (two WPP) suggested to manage as a unit of management; whereas, stock malalugis with the same genetic characters that are spread across in the FMA of Makassar Strait (south), Bone Bay, Tolo Bay, Flores Sea, Banda Sea, Tomini and Maluku Sea, it is suggested to managed as a single unit of management; however, the stock of Celebes Sea are managed separately as different management units. In the context of Java Sea fisheries the fact of the population structure (in case of D. macrosoma) did not shows an indication of west ward migration (Banda Sea-Flores Sea) to<br />the Java Sea like a Hardenberg (1938) hyphotese.</p>

Ocean Recovery

2019 ◽  
Author(s):  
Ray Hilborn ◽  
Ulrike Hilborn
Keyword(s):  
Fisheries Management ◽  
Marine Ecosystems ◽  
Popular Media ◽  
Fish Stock ◽  
General Audience ◽  
Fish Stocks ◽  
The Status ◽  
Comprehensive Survey ◽  
Graduate Seminars ◽  
The Impact

Over the last 2 decades, the scientific and popular media have been bombarded by gloom-and-doom stories on the future of fisheries, the status of fish stocks, and the impact of fishing on marine ecosystems. Dozens of certification and labeling schemes have emerged to advise consumers on what seafood is sustainable. In recent years, an opposing narrative has emerged emphasizing the success of fisheries management in many places, the increasing abundance of fish stocks in those places, and the prescription for sustainable fisheries. However, there has been no comprehensive survey of what really constitutes sustainability in fisheries, fish stock status, success and failures of management, and consideration of the impacts of fishing on marine ecosystems. This book will explore very different perspectives on sustainability and bring together the data from a large number of studies to show where fish stocks are increasing, where they are declining, the consequences of alternative fisheries management regimes, and what is known about a range of fisheries issues such as the impacts of trawling on marine ecosystems. Aimed principally at a general audience that is already interested in fisheries but seeks both a deeper understanding of what is known about specific issues and an impartial presentation of all of the data rather than selected examples used to justify a particular perspective or agenda. It will also appeal to the scientific community eager to know more about marine fisheries and fishing data, and serve as the basis for graduate seminars on the sustainability of natural resources.

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