scholarly journals OVERFISHING AND OVERCAPACITY SMALL SCALE FISHERIES IN SEMARANG CITY

2019 ◽  
Vol 11 (2) ◽  
pp. 427-435
Author(s):  
Jamaludin Malik ◽  
Achmad Fahrudin ◽  
Dietriech Geoffrey Bengen ◽  
Taryono Khodiron
Keyword(s):  
Sustainable Management ◽  
Maximum Sustainable Yield ◽  
Utilization Rate ◽  
Small Scale ◽  
Fishing Gear ◽  
Catch Per Unit Effort ◽  
Small Scale Fisheries ◽  
Surplus Production ◽  
Capacity Level ◽  
The Status

Fisheries in Semarang City are dominated by small-scale fisheries. This is indicated by the use of the largest fishing fleet of 10 gross tons operating near the coast. This study aims to analyze the status of small-scale fisheries in Semarang City for sustainable management. Sustainable management is management that guarantees the availability of natural resources and environmental services for future generations. The study was conducted for three months, namely September-November 2018 in the coastal waters of Semarang City, which was part of the Fisheries Management Region (WPP) 712. The method used in this study is the analysis of time series surplus production, namely data from the catch (ton/year) and the number of fishing gear (unit) within 10 years (2007-2016), to calculate the catch per-unit effort (CPUE), maximum sustainable yield (MSY), optimum effort (fopt), utilization rate (TP) and capacity level (TK). This study was obtained results of a downward trend in CPUE; the existing fishery catch or production in 2016 has exceeded the MSY value is 479 tons/year (Schaefer) and 439.11 tons/year (Fox); utilization rate of more than 100% which is 108-127% (Schaefer) and 118-138% (Fox), so that small-scale fisheries in Semarang City are at the level of over-exploited. Based on the fopt analysis, the number of fishing gear used (fexisting) has exceeded the optimum effort with a fishing capacity exceeding 100%, so that small-scale fisheries in Semarang City have experienced overcapacity.

scholarly journals Determination of the optimum effort for small scale fisheries in Bulukumba regency

2021 ◽  
Vol 919 (1) ◽  
pp. 012014
Author(s):  
A Agus ◽  
Najamuddin ◽  
A R Jalil ◽  
A F Petrus Nelwan
Keyword(s):  
Time Series Data ◽  
Production Method ◽  
Maximum Sustainable Yield ◽  
Series Data ◽  
Small Scale ◽  
Production Data ◽  
Catch Per Unit Effort ◽  
Small Scale Fisheries ◽  
Surplus Production ◽  
Almost All

Abstract This study aims to determine the catch per unit effort (CPUE) or abundance, maximum sustainable yield (Cmsy), optimum effort (Emsy), catch quota, utilization level, and effort of yellowfin tuna (Thunnus albacarez) for small scale fisheries in Bulukumba Regency, using a surplus production method, as well as time-series data for 11 years. According to the results, the CPUE or abundance average, Cmsw, Emsw, and catch quota, were about 4.4284 tons/unit, 720 tons, 184 units of hand line, and 576 tons, respectively. Meanwhile, the sustainable production with actual production showed overfishing, except for 2010 and 2015, while the production data for 2016 – 2020 were unavailable. In addition, the average MSY utilization, catch quota, and average effort levels were 61.9512 %, 77.4397 %, and 86.8352%, respectively. Theoretically, the MSY utilization levels for all years were about 100%, except for 2010 (1.4449 %) and 2015 (23.7581%), as well as 2012, where the value exceeded 100% (364.7357%), while the catch quota for all years was above 100 %, except for 2010 (1.8062 %) and 2015 (29.6976 %). However, the two production data values were unavailable for 2016 – 2020. Also, the effort levels fluctuated while almost all the half values were below 100 %.

scholarly journals ESTIMASI POTENSI DAN TINGKAT PEMANFAATAN SUMBERDAYA LOBSTER PASIR (Panulirus homarus) DI PERAIRAN PRIGI KABUPATEN TRENGGALEK

2019 ◽  
Vol 25 (3) ◽  
pp. 169
Author(s):  
Amula Nurfiarini ◽  
Danu Wijaya
Keyword(s):  
Spiny Lobster ◽  
Utilization Rate ◽  
Small Scale ◽  
Fishing Gear ◽  
Mark Recapture ◽  
Small Scale Fisheries ◽  
Stock Status ◽  
The Status ◽  
Coastal Cliffs ◽  
Part Time

Spiny lobster atau dikenal dengan sebutan udang karang merupakan komoditas perikanan unggulan yang pemanfaatannya cukup intensif di Teluk Prigi, Kabupaten Trenggalek. Sejauh ini informasi mengenai status stok sebagai dasar pengelolaannya masih sangat terbatas. Salah satu pendekatan untuk menduga status stok yang dapat dilakukan adalah dengan penandaan. Penelitian ini bertujuan untuk mengetahui potensi sumberdaya lobster pasir dan dinamika pemanfaatanya di Perairan Prigi. Metode penelitian menggunakan pendekatan tandai-lepas-tangkap kembali (Capture-Mark-Recapture/CMR), sedangkan analisis potensi lobster mengacu pada Petersen. Hasil penelitian menunjukkan bahwa perikanan lobster termasuk kategori perikanan artisanal (small scale fisheries) yang dijalankan paruh waktu dan dilakukan secara one day fishing. Alat tangkap yang digunakan meliputi; jaring insang (gillnet), krendet (trap net) dan bubu (trap net). Penyebaran lokasi penangkapan di sepanjang tebing pantai berkarang di pesisir Teluk Prigi. Musim puncak penangkapan terjadi pada bulan Oktober-Maret. Karakteristik hasil tangkapan yang didaratkan masih didominasi oleh ukuran larang tangkap yakni mempunyai panjang karapas < 8 cm atau pada kisaran bobot 200-300 g per ekor yang mana proporsi ini mencapai 84,79% dari total tangkapan. Potensi Lobster Pasir di Teluk Prigi adalah 1,19 ton/th dengan tingkat pemanfaatannya baru sekitar 44,53 %. Spiny lobster is a superior fishery commodity that is utilized quite intensively in Prigi, Trenggalek Regency. However information about the status of stocks as a basis for management is still very limited. One approach to estimating stock status that can be done is by marking. This study aims to determine the potential of spiny lobster resources from type of sand lobster, and the dynamics of its utilization in the Prigi Bay waters. The research method uses the Capture-mark-recapture (CMR) approach, while the analysis of lobster stock potential refers to Petersen. The results showed that lobster fisheries were categorized as artisanal fisheries (small scale fisheries) which were run part-time and carried out one day fishing. The fishing gear used includes; net (gillnet), trap net is called as krendet and bubu. Distribution of fishing location along the rugged coastal cliffs on the coast of Prigi waters. The peak for catching season occurs in October-March. The characteristics of the landed catches are still dominated by the no-take size carapace length <8 cm or in the weight range of 200-300 g per tail which reaches 84,79% of the total catch. Sand Lobster Potential in Prigi is 1.19 tons per year with a new utilization rate of around 44,53%.

scholarly journals Determination of The Status of Utilization and Level of Sepat (Trichogaster sp) in Public Waters of Mainland Banjar Regency

2019 ◽  
Vol 5 (1) ◽  
pp. 11-17
Author(s):  
Irhamsyah Irhamsyah ◽  
Novita Sari ◽  
Iriansyah Iriansyah
Keyword(s):  
Maximum Sustainable Yield ◽  
Catch Rate ◽  
Survey Method ◽  
Utilization Rate ◽  
Sustainable Yield ◽  
Effort Level ◽  
Surplus Production ◽  
The Status

 The fishing of Sepat (Trichogaster sp) in freshwaters of Banjar Regency with a solid intensity that has lasted long enough. This study aims: (1) Knowing the model of surplus production that can be used. (2) Knowing the optimum effort Sepat  (3) Knowing maximum sustainable yield. (4) Knowing the utilization level of Sepat. (5) Knowing the effort level of Sepat. The method that used in this research is survey method and collecting data. Data is analyzed by the Schaefer’s model and Fox’s model. The result of this research: (1) The best model is the Schaefer model with R2 and validation value. (2) The catch rate of Sepat is 45630 trip per year. (3) Maximum sustainable yield of Sepat is 45,466 ton per year. (4) The utilization rate of Sepat (Trichogaster sp) is 33%  which shows there has been no more catch under fishing (5) Effort level of Sepat  is 16 %.

scholarly journals Experimental evaluation of influence of FADs on community structure and fisheries in coastal Kenya

2018 ◽  
Vol 31 ◽  
pp. 6 ◽  
Author(s):  
Emmanuel K. Mbaru ◽  
Dorcas Sigana ◽  
Renison K. Ruwa ◽  
Elizabeth M. Mueni ◽  
Collins K. Ndoro ◽  
...  
Keyword(s):  
Fish Assemblages ◽  
Small Scale ◽  
Catch Per Unit Effort ◽  
Fish Stocks ◽  
Coastal Fisheries ◽  
Small Scale Fisheries ◽  
Open Sea ◽  
Catch Composition ◽  
Structural Indices ◽  
Fish Aggregating Devices

Fish aggregating devices (FADs) have been widely used by commercial fisheries to increase the catchability of pelagic stocks in the open sea. FADs have the potential to enhance nearshore small-scale fisheries where stocks are often overfished. This study examined changes in catch composition, abundance, catch and effort, and aspects of diversity in Kenya's nearshore coastal fisheries after deployment of anchored fish aggregating devices (AFADs). The study combined both fishery independent and dependent methods in assessing changes in fish assemblages post-deployment. Results showed orders of magnitude increase in length, weight, commercial value, and catch per unit effort (CPUE) of landed catch after deployment of FADs suggesting that FADs had a positive effect on the local fishery. Species richness at FAD sites increased post-deployment (n = 281) compared to pre-deployment values (n = 223). Simultaneous use of several complementary structural indices may be required in order to accurately describe and monitor fish assemblages around the FADs. The findings suggest that AFADs are capable of creating both short and long-term impacts on livelihoods, with the potential to deflect pressure on the overfished nearshore fish stocks. However, more research will be needed on redistribution of fish around FADs, design and placement configuration, and site selection amongst others.

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 The status of routine fishery data collection in Southeast Asia, central America, the South Pacific, and West Africa, with special reference to small-scale fisheries

2011 ◽  
Vol 68 (8) ◽  
pp. 1743-1750 ◽  
Author(s):  
Gertjan J. de Graaf ◽  
Richard J. R. Grainger ◽  
Lena Westlund ◽  
Rolf Willmann ◽  
David Mills ◽  
...  
Keyword(s):  
Developing Countries ◽  
Data Collection ◽  
West Africa ◽  
Special Reference ◽  
Central America ◽  
Small Scale ◽  
Small Scale Fisheries ◽  
Status And Trends ◽  
The Status ◽  
Fishery Data

Abstract de Graaf, G. J., Grainger, R. J. R., Westlund, L., Willmann, R., Mills, D., Kelleher, K., and Koranteng, K. 2011. The status of routine fishery data collection in Southeast Asia, central America, the South Pacific, and West Africa, with special reference to small-scale fisheries. – ICES Journal of Marine Science, 68: 1743–1750. The Food and Agriculture Organization (FAO) strategy for improving information on the status and trends of capture fisheries (FAO Strategy STF) was endorsed by Member States and the UN General Assembly in 2003. Its overall objective is to provide a framework, strategy, and plan to improve knowledge and understanding of the status and trends of fisheries as a basis for policy-making and management, towards conservation and sustainable use of resources within ecosystems. The FAO supports the implementation of FAO Strategy STF in developing countries through a project known as FAO FishCode–STF, and an initiative funded by the World Bank entitled the “BigNumbers project”. The BigNumbers project underscored the importance of small-scale fisheries and revealed that catches by and employment in this sector tend to be underreported. An inventory of data collection systems made under the FAO FishCode–STF project showed that small-scale fisheries are not well covered. Their dispersed nature, the weak institutional capacity in many developing countries, and the traditional methods used make routine data collection cumbersome. Innovative sampling strategies are required. The main priority is a sample frame for small-scale fisheries. Sustainable strategies are most likely to be found outside the sector through population and agricultural household censuses and inside the sector through the direct involvement of fishers.

scholarly journals KARAKTERISTIK PERIKANAN TERI (ENGRAULIDAE) DI PANTAI UTARA JAWA-MADURA

2021 ◽  
Vol 26 (3) ◽  
pp. 135
Author(s):  
ACHMAD ZAMRONI ◽  
Heri Widiyastuti ◽  
Suwarso Suwarso
Keyword(s):  
North Coast ◽  
Small Scale ◽  
Fishing Gear ◽  
Eastern Region ◽  
Northern Coast ◽  
Catch Per Unit Effort ◽  
Fishing Season ◽  
The North ◽  
Fishing Vessels ◽  
Landing Sites

Perikanan teri berkembang sangat pesat khususnya di perairan utara Jawa Madura pada tahun terakhir ini. Kajian tentang karakteristik perikanan teri (Engraulidae) di sepanjang pantai utara Jawa-Madura dilaksanakan pada tahun 2017-2018, meliputi sebaran usaha perikanan, tipe armada-alat penangkapan ikan, aspek operasional penangkapan, hasil tangkapan-kelimpahan dan musim penangkapan ikan teri. Pengumpulan data pendaratan ikan teri dilakukan melalui survey di 11 lokasi pendaratan ikan. Hasil penelitian menunjukkan terdapat 12 lokasi tempat pendaratan utama ikan teri di sepanjang pantai utara (pantura) Jawa dan Madura. Dua jenis alat dominan digunakan untuk penangkapan teri adalah pukat cincin dan payang; perikanan bersifat skala kecil, melakukan trip harian, dengan armada kapal penangkap berukuran dibawah 20 GT. Jaring umumnya menggunakan waring dengan mata jaring kecil (3/8 inch) di bagian kantong. Daerah penangkapan di perairan pantai yang dangkal, dekat dengan basis perikanan. Musim penangkapan ikan teri bervariasi, di wilayah bagian barat (Pulolampes, Larangan, Morodemak) berlangsung sekitar musim timur/tenggara (Mei Juli), sedangkan di wilayah bagian timur berlangsung pada awal musim timur dan berjalan cukup lama hingga bulan November (musim peralihan 2). Hasil tangkapan per unit upaya (CPUE, sebagai indek kelimpahan) diduga makin ke arah timur semakin rendah namun disertai musim penangkapan ikan lebih lama. Anchovy fishery has grown rapidly, especially in the northern waters of Java-Madura in the last year. The study on the characteristics of the anchovy fishery (Engraulidae) along the northern coast of Java-Madura was carried out in 2017-2018, covering the distribution of fisheries effort, types of fishing gear, operational aspects of fishing, catch-abundance and fishing season. The collection of anchovy landing data was carried out through a survey at 11 fish landing sites. The results showed that there were 12 main anchovy landing sites along the north coast (pantura) of Java and Madura. Two types of dominant fishing gear used for anchovies are purse seine and payang; Fisheries are small-scale, undertaking daily trips, with a fleet of fishing vessels under 20 GT. The nets generally use “waring” with small mesh (3/8 inch) in the codend. Fishing area in shallow coastal waters, close to the fishing base. The fishing season for anchovy varies, in the western region (Pulolampes, Larangan, Morodemak) it takes place around the east / southeast season (May-July), while in the eastern region it takes place at the beginning of the eastern season and lasts quite a long time until November (transition season 2) . The catch per unit effort (CPUE, as an abundance index) is thought to be getting lower eastward but accompanied by a longer fishing season.

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.

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