scholarly journals IMPACT OF THE INCREASING CATCHABILITY COEFFICIENT OF THE LARGE PURSE SEINER TO THE DEPLETION OF THE SMALL PELAGIC FISH BIOMASS IN THE JAVA SEA

2017 ◽  
Vol 17 (1) ◽  
pp. 13
Author(s):  
Suherman Banon Atmaja ◽  
Duto Nugroho
Keyword(s):  
Marine Fish ◽  
Historical Data ◽  
Pelagic Fish ◽  
Fish Biomass ◽  
Small Pelagic Fish ◽  
Fish Resources ◽  
Java Sea

Understanding the dynamics of marine fish resources and its ecosystems requires long term historical data from a particular fisheries in a certain area.

scholarly journals Trend analysis of catching fish Decapterus sp. in the Muncar Coastal Fisheries Port, Banyuwangi, Indonesia

2020 ◽  
Vol 3 (2) ◽  
Author(s):  
Devi Purwinda ◽  
Hany Handajani ◽  
Anis Zubaidah
Keyword(s):  
Time Series ◽  
Secondary Data ◽  
Pelagic Fish ◽  
Research Data ◽  
Catch Per Unit Effort ◽  
Small Pelagic Fish ◽  
Coastal Fisheries ◽  
Fish Resources ◽  
Flying Fish ◽  
Java Sea

Small pelagic fish resources in the Java Sea, especially Banyuwangi, are dominated by catches of Decapterus sp, which are mostly landed at the UPT of the Coastal Fisheries Port Muncar. This study aimed to provide information on CPUE trends (Catch Per Unit Effort) and the seasonality of flying fish in the Coastal Fisheries Port Muncar as an effort to encourage effective and sustainable in using of fishery resources. The method used in this study was a survey. The research data was obtained through secondary data including time series of the production of catches of flying fish, and trip data of purse seine, payang and bagan from 2015 to 2019 collected by Coastal Fisheries Port Muncar. The analysis used the CPUE analysis by comparing catches to capture attempts. The results showed, from 2015 to 2019, the highest CPUE of flying fish occurred in 2019, amounting to 13 365.5 kg/trip, while the lowest CPUE occurred in 2016 amounted to 1 050.6 kg/trip. The trend of CPUE flying fish from 2015 to 2019 experienced a fluctuating increase with an average of 7 327.5 kg/trip. A good season for flying fishing occurs from May to December, and shares a peak in December, while famine occurs in January.

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 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 Can small pelagic fish landings be used as predictors of high-frequency oceanographic fluctuations in the 1–2 El Niño region?

2016 ◽  
Vol 42 ◽  
pp. 61-72 ◽  
Author(s):  
Franklin Isaac Ormaza-González ◽  
Alejandra Mora-Cervetto ◽  
Raquel María Bermúdez-Martínez ◽  
Mario Armando Hurtado-Domínguez ◽  
Manuel Raúl Peralta-Bravo ◽  
...  
Keyword(s):  
Linear Correlation ◽  
El Niño ◽  
El Nino ◽  
Pelagic Fish ◽  
La Niña ◽  
Negative Slope ◽  
South American ◽  
Small Pelagic Fish ◽  
La Nina

Abstract. A group of small pelagic fish captured between 1981 and 2012 within El Niño area 1–2 by the Ecuadorian fleet was correlated with the oceanographic Multivariate ENSO Index (MEI), and the Oceanographic El Niño Index (ONI) referred to El Niño region 3–4. For the period 1981–2012, total landings correlated poorly with the indexes, but during 2000–2012 (cold PDO) they proved to have a 14–29 % association with both indexes; the negative slope of the curves suggested higher landing during cold events (La Niña) and also indicated a tendency to decrease at extreme values ( >  0.5 and  < −1.0). Round herring (Etrumeus teres) fourth-quarter (Q4) landings were related to the MEI in a nonlinear analysis by up to 80 %. During moderate or strong La Niña events landings noticeably increased. Bullet tuna (Auxis spp.) catches showed a negative gradient from cold to warm episodes with an R2 of 0.149. For Chilean jack mackerel (Trachurus murphyi) irregular landings between 2003 and 2007 were observed and were poorly correlated (R2 < 0.1) with ONI or MEI. Anchovy (Engraulis ringens) captured in Ecuadorian waters since 2000 had an R2 of 0.302 and 0.156 for MEI and ONI, respectively, but showed a higher correlation with the cold Pacific Decadal Oscillation (PDO). South American pilchard (Sardinops sagax) was higher than −0.5 for the ONI and MEI, and landings dramatically decreased; however, Q4 landings correlated with ONI and MEI, with R2 of 0.109 and 0.225, respectively (n = 3). Linear correlation of Q4 indexes against the following year's Q1 landings had a linkage of up to 22 %; this species could therefore be considered a predictor of El Niño. Chub mackerel (Scomber japonicus) landings did not have a significant linear correlation with the indexes for 1981–2012 and therefore could not be considered a valid predictor. Chuhueco (Cetengraulis mysticetus) is a local species with high landings during El Niño years and, conversely, remarkably low landings during La Niña years. Additionally, chuhueco availability and landings were negatively affected by cold PDOs. Pacific thread herring (Opisthonema spp.) showed a 24 and 36 % relationship between landings (Q1) and the MEI and ONI (Q4). Therefore, results suggest that the South American pilchard and Pacific thread herring could be considered good species to use as predictors of El Niño in region 1–2 (Ecuador), especially when average Q4 MEI ∕ ONI is used against the next trimester Q1 landing. All species were prone to lower landings and/or fishing availability during strong–extreme events (ONI/MEI,  >  1.0 and  <  −1.0), and were also shown to be affected by the PDO. In the long term, landings decreased under warm PDO and vice versa, and therefore PDO fluctuations could be used to help manage these fisheries and to help the industry in long-term planning.

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>

scholarly journals KAPASITAS PENANGKAPAN PUKAT CINCIN MINI DI PEMALANG

2017 ◽  
Vol 15 (2) ◽  
pp. 171
Author(s):  
Erfind Nurdin ◽  
Tri Wahyu Budiarti
Keyword(s):  
Data Envelopment Analysis ◽  
Capacity Utilization ◽  
Pelagic Fish ◽  
Fish Stock ◽  
Data Envelopment ◽  
Small Pelagic Fish ◽  
Fishing Capacity ◽  
Java Sea ◽  
Fishery Status ◽  
Dea Method

Sumber daya ikan pelagis kecil di Laut Jawa merupakan komoditi perikanan yang penting dan bersifat strategis. Sejalan dengan perkembangan pemanfaatannya, tekanan penangkapan yang tinggi dialami oleh hampir seluruh kawasan, terlebih di wilayah tradisionil. Kapasitas penangkapan akhir-akhir ini menjadi isu penting dalam perikanan global, mengingat di berbagai kawasan terjadi kapasitas berlebih dan penurunan stok ikan. Salah satu cara untuk mengetahui status perikanan terkini dilakukan dengan mengukur kapasitas perikanan. Penelitian ini dilakukan pada bulan Mei dan Juli tahun 2007 dengan metode Data Envelopment Analysis. Nilai rata-rata pemanfaatan variabel input (VIU) untuk daya lampu dan bahan bakar menunjukkan nilai di atas 1 (optimum = 1) yang mengindikasikan adanya kelebihan penggunaan variabel sehingga dipandang perlu untuk melakukan pengurangan variabel input. Nilai pemanfaatan kapasitas (CU) lebih besar dari 0,5 hampir mencapai 60% dari 106 kapal contoh. Hal ini menunjukkan bahwa nilai CU kurang dari 1 mendominansi distribusi perolehan nilai CU yang dapat diartikan telah terjadi kelebihan kapasitas pemanfaatan untuk penangkapan pukat cincin mini dengan basis di Pemalang, sehingga perlu upaya pengurangan kapasitas. Small pelagic fish resource in Java sea is an important fishery commodity. Nowadays high fishing pressure is experienced by mostly fishing areas, particularly in traditional zone. Fishing capacity recently becomes important issue in global fishery, because over capacity and fish stock decreasing is occured in various areas. One method to know the fishery status is by measuring fishery capacity, which is categorized as over capacity, under capacity or optimal condition. This study was carried out on May and July 2007. The method applied in this measurement of fishing capacity was DEA method (Data Envelopment Analysis). The average of variable input utilization for light intensity and fuel showed value of more than 1 (optimum = 1), indicating the usage of excess variable that need to reduce the input variable. The value of higher than 0.5 of capacity utilization showed 60% from 106 ships sample. This indicates that the CU value of less than 1 dominated the distribution of capacity utilization value. For mini purse seine based in Pemalang showed over capacity. This means, it needs to reduce the effort of fishing capacity.

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