scholarly journals STRATEGI PENGELOLAAN SUMBER DAYA UDANG LAUT DALAM SECARA BERKELANJUTAN DI INDONESIA

2013 ◽  
Vol 5 (1) ◽  
pp. 47
Author(s):  
Ali Suman ◽  
Fayakun Satria
Keyword(s):  
Deep Sea ◽  
Early Stage ◽  
Fishing Effort ◽  
Fishing Ground ◽  
Total Allowable Catch ◽  
Shallow Marine ◽  
Management Measures ◽  
Long Run ◽  
Sea Area ◽  
Untapped Resource

<p>Pemanfaatan sumber daya udang di Indonesia dilakukan pada wilayah perairan laut dangkal dan status pengusahaannya sudah dalam tahapan jenuh (over-fishing). Apabila kondisi ini dibiarkan dalam jangka panjang tanpa adanya usaha pengelolaan yang berkelanjutan, maka akan menyebabkan kelestarian sumber daya udang akan terancam dan bahkan bisa punah. Salah satu hal yang harus dilakukan dalam mengantisipasinya adalah mencari daerah penangkapan baru di perairan laut dalam, berupa sumber daya udang yang potensial dan belum pernah dimanfaatkan (untapped resources). Komposisi jenis udang laut dalam di perairan Indonesia lebih dari sekitar 38 jenis dengan jenis udang yang mendominasi adalah Plesiopenaeus edwardsianus dan Aristeus virilis serta alat tangkap yang disarankan untuk pemanfaatannya adalah bubu laut dalam tipe silinder. Potensi penangkapan udang laut dalam di Kawasan Barat Indonesia (KBI) sebagai 640 ton per tahun dan di Kawasan Timur Indonesia (KTI) sebagai 2.840 ton per tahun. Agar pengelolaan sumber<br />daya udang laut dalam dapat dilakukan berkelanjutan, maka harus dikelola dari awal pemanfaatannya. Strategi pengelolaan yang harus dilakukan adalah membatasi upaya penangkapan pada tingkat upaya sekitar 285 armada bubu laut dalam di KBI dan sekitar 1.250 armada bubu laut dalam di KTI. Selain itu harus dilakukan penutupan musim dan daerah penangkapan serta dilakukan penetapan kuota penangkapan.</p><p>The utilization of Indonesia’s shrimps resources are commonly taking from shallow marine water while its status is currently on overfishing stage. In the long run without appropriate management will threat its sutainability and may be worsen to become extinct. A possible anticipition is finding a new fishing ground at deep sea area for potential deep sea shrimps as untapped resource. Deep sea shrimps species composition have been identified for more than 38 species with mainly dominated by Plesiopenaeus edwardsianus and Aristeus virili. Recommended fihing gear for utilizing those resource is deep sea cylinder pots. Deep sea shrimps fishing potency whithin Western Indonesia Area (WIA) was estimated for 640 mt/year and Eastern Indonesia Area (EIA) was 2.840 mt/year. Asssuring the sustainability of deep sea shrimp resource require right and apropriate management apply since the early stage. It is proposed to adopt several management measures such as limit the fishing effort for 285 deep sea pots within WIA and 1.250 deep sea pots within EIA, apply close area and fishing season and determine total allowable catch.</p>

scholarly journals ANALISIS BIOEKONOMI SUMBER DAYA IKAN TENGGIRI (Scomberomorus commerson) DI PERAIRAN KABUPATEN INDRAMAYU JAWA BARAT)

2014 ◽  
Vol 4 (2) ◽  
pp. 117
Author(s):  
Lugas Lukmanul Hakim ◽  
Zuzy Anna ◽  
Junianto Junianto
Keyword(s):  
Natural Resources ◽  
Fishing Effort ◽  
Fishing Ground ◽  
Survey Method ◽  
Fishing Gear ◽  
Total Allowable Catch ◽  
Spanish Mackerel ◽  
Management Regime ◽  
Gill Net ◽  
Scomberomorus Commerson

Penelitian ini memaparkan analisis bioekonomi pemanfaatan sumber daya ikan tenggiri pada berbagai rezim melalui Model Gordon Schaefer dengan model estimasi parameter biologi CYP serta arah kebijakan pengelolaannya di Kabupaten Indramayu. Penelitian ini dilaksanakan pada Bulan Februari-Juli 2014 dengan metode survey melalui analisis kuantitatif deskriptif. Hasil penelitian menunjukkan laju pertumbuhan intrinsik (r) adalah 10,291 ton/tahun, koefisien daya tangkap (q) adalah 0,001673 ton/trip, daya dukung lingkungan adalah 250,028 ton/tahun, biaya (c) adalah 1,762 Rp/trip dan harga (p) adalah 30,750 Rp/ton. Upaya maksimum lestari (EMSY) yaitu 3076 trip/tahun dengan nilai produksi maksimum lestari (hMSY) sebesar 643,260 ton/tahun. Upaya MEY (EMEY) sebesar 2654 trip/tahun dengan produksi (hMEY) sebesar 631,141 ton/tahun. Upaya penangkapan perikanan terbuka (Eoa) adalah 5.308 trip/tahun dengan produksi (hOA) sebesar 304,689 ton/tahun. Kegiatan pemanfaatan menunjukkan tangkap lebih secara biologi dan ekonomi. Implementasi kebijakan dari penelitian ini adalah pembatasan upayasebesar 314-736 trip, pengaturan armada alat tangkap jaring insang hanyut adalah 353-409 unit, payang 0-5 GT adalah 409-474 unit, payang > 5-10 GT adalah 73-85 unit, Jumlah tangkapan diperbolehkan ikantenggiri sebesar 514,608 ton dengan kuota jaring insang hanyut sebesar 485,680 ton, payang 0-5 GT sebesar 5,772 ton, payang > 5-10 GT sebesar 23,156 ton, pengaturan teknis lainnya (perlindungan SDAdan DPI, pengawasan pemanfaatan sumber daya dan pungutan perikanan tangkap).Title: Bioeconomic Analysis of Narrow-barred Spanish Mackerel (Scomberomorus commerson) in The Water of Indramayu Regency West JavaThis research analyzed bioeconomic modelling of narrow-barred spanish mackerel in every fisheries management regime through Gordon Schaefer Model and CYP Parameter Estimation model, also a direction of its management policy in Indramayu Region. This research was conducted from February to July 2014, survey method and descriptive quantitative analysis were used in carrying out this research. The results of this research indicated that intrinsic growth parameter (r) of narrow-barredspanish mackerel approximately 10,291 ton/year, catchability coefficient (q) was about 0,001673 ton/trip, carrying capacity (K) reached at 250,028 ton/year, cost (c) was 1,762 Rp/trip and price (p) was 30,750Rp/ton. Maximum sustainable yield fishing effort (EMSY) reached at 3,076 trip/year with productionof MSY (hMSY) approximately 643,260 ton/year. MEY fishing effort (EMEY) reached 2,654 trip/year with MEY production (hMEY) Approximately 631,141 ton/year. Open access fishing effort (Eoa) reached about 5.308 trip/year with production (hOA) approximately 304,689 ton/year. Harvesting of narrow-barred spanish mackerel indicated biological and economic overfishing. The implementation from this research results were conducting limited entry for 314-736 trip; controlling fishing fleet for each fishing gear: gill net (< 5 GT) was about 353-409 unit, seine net (< 5 GT) was about 409-474 unit, others seine net (>5- 10GT) was 73-85 unit; Total Allowable catch of narrow-barred spanish mackerel was about 514,608 ton with quote for every fishing gear: gill net was about 485,680 ton, seine net (<5GT) approximately 5,772 ton,others seine net (>5-10GT) was about 23,156 ton; and others in technical control (natural resources and fishing ground conservation, controlling of natural resources harvesting and fishing fee aplication).

scholarly journals OPSI PENGELOLAAN SUMBERDAYA UDANG DI LAUT ARAFURA (WPP 718)

2014 ◽  
Vol 6 (2) ◽  
pp. 97
Author(s):  
Ali Suman ◽  
Fayakun Satria
Keyword(s):  
Management Strategies ◽  
Fishing Effort ◽  
Total Allowable Catch ◽  
Strong Law ◽  
Closed Area ◽  
Long Run ◽  
The Status ◽  
Arafura Sea ◽  
Monitoring And Surveillance ◽  
Closed Season

<p>Pemanfaatan sumber daya udang sudah berlangsung cukup lama di perairan Arafura dan status pemanfaatannya sudah berada dalam tahapan yang lebih tangkap (over-exploited). Kondisi yang demikian terjadi karena belum adanya pengelolaan yang tepat akibat kurangnya kualitas kebijakan dan informasi hasil penelitian untuk mendasari kebijakan tersebut. Apabila keadaan ini terus berlangsung dalam jangka panjang, maka akan mengancam kelestarian dan keberlanjutan pemanfaatan sumber daya udang. Untuk mencegah hal itu maka perlu diterapkan opsi-opsi pengelolaan meliputi penutupan daerah/musim penangkapan pada bulan Februari, penerapan kuota penangkapan dengan JTB (Jumlah total tangkapan yang dibolehkan) 39.600 ton per tahun dan melakukan moratorium upaya penangkapan dengan skenario pengurangan 225 armada pukat udang. Keseluruhan opsi kebijakan ini harus ditunjang dengan peningkatan pemantauan, pengawasan dan penegakan hukum.</p><p> </p><p>Arafura shrimps resources have been long utilized and to date the status of the resources are over-exploited. To date there are no appropriate management nor involving scientific advice to this fishery.  In  the  long run  with  the  persistence  condition  the  shrimp  resource  should unsustainably manage and the fishery will collapse. It is urgent to define appropriate management strategies for this fishery based on best scientific finding to the manager to ensure its sustainability. Among other advices  are  apply  closed  area  for Arafura-sea  combining  with  closed  season in  February,  apply fishing  quota  with  total  allowable  catch  (TAC)  for  39,600/yera,  no  increase  of  fishing  effort,  and reduce the number of shrimps trawler for 225 boats. These overall management strategies should fully be supported by increase of monitoring and surveillance with strong law enforcement.</p><p> </p>

scholarly journals A Bioeconomic Analysis of the Sandfish (Arctoscopus japonicus) Management Policies of the Eastern Sea Danish Fishery in Korea

2021 ◽  
Vol 13 (14) ◽  
pp. 7868
Author(s):  
Ji-Hoon Choi ◽  
Jae-Bong Lee ◽  
Sang-Chul Yoon ◽  
Do-Hoon Kim
Keyword(s):  
Resource Management ◽  
State Space ◽  
State Space Model ◽  
Fishing Effort ◽  
The State ◽  
Catch Per Unit Effort ◽  
Total Allowable Catch ◽  
Space Model ◽  
Management Measures ◽  
Management Policies

Before implementing resource management measures, it is essential to establish the goals of fisheries resource management by assessing the current biomass status and the level of fishing effort. This study aims to compare surplus production models, i.e., process-error and state-space models, based on how they fit the observed data. The effects of the Sandfish Stock Rebuilding Plan are analyzed using a bioeconomic model. The analytical results show that the least error is between the estimated and observed catch per unit effort using the state-space model. Therefore, the analysis results obtained using the state-space model are considered as the most reliable. The total allowable catch for Korean sandfish is set at 2196 tons per year. However, if we increase the current management regulation standard for available annual catch by 50%, the sandfish resource could be depleted. Furthermore, NPV decreased to 172,599 thousand won after ten years, in 2029. Therefore, a recommendation of this study is that when management policies for sandfish stock prioritize recovery, this would facilitate fisheries rebuilding.

scholarly journals Spatial management of the European hake Merluccius merluccius fishery in the Catalan Mediterranean: Simulation of management alternatives with the InVEST model

2018 ◽  
Vol 82 (S1) ◽  
pp. 175 ◽  
Author(s):  
Meryeme Khoukh ◽  
Francesc Maynou
Keyword(s):  
Fishing Effort ◽  
Fishing Ground ◽  
Management Scenarios ◽  
Merluccius Merluccius ◽  
Invest Model ◽  
Ontogenetic Migration ◽  
Management Measures ◽  
Spatial Management ◽  
Management Alternative ◽  
European Hake

European hake (Merluccius merluccius) is an important commercial fisheries species that shows growth overfishing, with catches basically focused on juveniles. This study assesses the benefit of closing a coastal area (an essential habitat for European hake recruits) to fishing, in addition to other alternatives of spatial management, compared with traditional, non–spatial management scenarios on fishing grounds exploited by the bottom trawl fleets of Blanes and Palamós (Province of Girona, NE Spain). We use InVEST, a spatially explicit model of intermediate complexity that simulates the bioeconomic effects of management measures for decision making. The sensitivity analysis of the model results shows the high influence of some parameters, particularly the parameterization of the recruitment submodel and European hake’s fecundity coefficients. The results are also examined in the light of uncertainty on migration parameters: in the two cases analysed (considering migration patterns or not), the results of the indicators (catch and revenues, abundance, recruitment and spawning stock biomass) were qualitatively similar and all show that the application of a restricted fishing area in one particular fishing ground (Vol de Terra) is the best management alternative. Its bioeconomic effects are comparable to a reduction of fishing effort of up to 20%. With high levels of ontogenetic migration, fishing on a second fishing ground (Cul de Rec – El Pas) should be restricted to enhance the biomass of the European hake population.

Preliminary observations on abundance and distribution of fish fauna in a canyon of the Bay of Biscay (ICES Division 8c)

2021 ◽  
pp. 1-10
Author(s):  
G. Diez ◽  
L. Arregi ◽  
M. Basterretxea ◽  
E. Cuende ◽  
I. Oyarzabal
Keyword(s):  
Deep Sea ◽  
Basque Country ◽  
Fish Fauna ◽  
Fishing Effort ◽  
Fishing Gear ◽  
Clear Trend ◽  
Depth Ranges ◽  
Abundance And Distribution ◽  
Sea Fish ◽  
Distribution Of Fish

Abstract The changes in abundance and biodiversity of deep-sea fish fauna are described based on an annual deep-water longline survey with data collected during the period 2015–2019 in the Basque Country continental Slope (ICES Division 8c). The sampling scheme included hauls in four 400 m strata, from 650–2250 m deep. The DST sensors installed in the main line have allowed us to set an accurate soak time for each haul, and they were used to calculate fishing effort and CPUE by haul. The catchability of the fishing gear indicated that 15% of the total hooks deployed in the five-year period were able to fish, and that the bottom longline was very effective in fishing a wide number of different species in all depth ranges. The fishing gear caught 14 different species of sharks (13 deepwater and one pelagic), two chimaeras and nine teleosts. The abundance and biomass registered on the hooks attached to the bottom were between three and four times higher than in the floating sections, and the highest CPUE and biomass were recorded between 1051–1450 m, from 2015 to 2017, and in the 1451–1850 m strata, but they do not show any clear trend throughout the five years of the series.

New Scientific Information Can Help to Inform the Evaluation of EU Deep-sea Fisheries Regulations

2021 ◽  
pp. 1-20
Author(s):  
Phillip J Turner ◽  
Matthew Gianni ◽  
Ellen Kenchington ◽  
Sebastian Valanko ◽  
David E Johnson
Keyword(s):  
Deep Sea ◽  
Scientific Information ◽  
Fish Population ◽  
Molecular Techniques ◽  
Fish Stocks ◽  
Horizon 2020 ◽  
Management Measures ◽  
Sea Fish ◽  
The Eu ◽  
Fish Population Structure

Abstract The European Union’s deep-sea fisheries regulations (Regulation (EU) No. 2016/2336) established obligations to manage deep-sea fisheries and to protect vulnerable marine ecosystems (VMEs). The European Commission is scheduled to complete a review of the regulations in 2021, providing an opportunity for new scientific information to be incorporated into the implementation of the regulations. Here, we summarise research outputs from the EU-funded Horizon 2020 ATLAS Project and explain their relevance to the regulation of deep-sea fisheries in EU waters. ATLAS research has increased our understanding of the distribution of VMEs and their importance in terms of ecosystem functioning. ATLAS research has also highlighted the utility of molecular techniques to understand fish population structure and the potential for habitat suitability models to help incorporate climate change into decision-making. Building on these scientific advances, we provide recommendations to help increase the effectiveness of management measures to conserve deep-sea fish stocks and protect VMEs.

scholarly journals Spatial and temporal distribution of fishing resources exploited by the Manaus fishing fleet, Amazonas, Brazil

2007 ◽  
Vol 67 (4) ◽  
pp. 651-656 ◽  
Author(s):  
VS. Batista ◽  
M. Petrere Jr
Keyword(s):  
Amazon Basin ◽  
Temporal Distribution ◽  
Fishing Effort ◽  
Fishing Ground ◽  
Rural And Urban ◽  
Environmental Variations ◽  
Fishing Resources ◽  
The Right ◽  
Urban People ◽  
Operational Aspects

Fishing resources are important generators of income and food for the rural and urban people in the Amazon. The present paper investigates fishing and environmental variables determining fishing production landed in Manaus and evaluates the relative abundance of commercial fishes in the different sub-systems of the Central Amazon basin. Information collected was used to test the new catch index derived from multiple regressions with the following significant variables: number of fisherman days fishing; distance of the fishing ground from Manaus; amount of ice carried during the trip; and river level. There were no significant differences between mean catch values of the Purus, Madeira and Juruá sub-systems. These results suggest that the tributaries of the right margin were very similar and were the most productive in commercial terms. The actual production varies according to the recent magnitude of fishing effort, environmental variations and operational aspects of fishing, particularly ice consumption.

A Psycho-Educational Approach to Coping with Failure Amongst Pupils

1982 ◽  
Vol 3 (4) ◽  
pp. 231-235 ◽  
Author(s):  
Ruth Engel
Keyword(s):  
General Model ◽  
Early Stage ◽  
Educational Approach ◽  
Long Run ◽  
The Future ◽  
Basic Objective ◽  
The Individual

In this paper I hope to explain the reasons for developing a method to provide the individual with tools to cope with failure at an early stage of his life; additionally, the general principles of that method will be formulated. Obviously, the basic objective is ultimately aimed at conditioning the child's thinking towards development of different attitudes in relation to failure situations. Success of the method, in the long run, depends upon the repetition of similar techniques, at least during the first years of the child's schooling. Thus we tend to believe that if we ‘instil’ in the child the proposed way of relating, he will then be able to cope not only with failure in the future but also with pressures exerted by unskilled teachers in school, who may use failure as a threat. As an additional alternative there is proposed a general model of treating children who have not been trained at an earlier stage to deal with failure within the school framework.

scholarly journals A fishing ground benthic ecosystem improved during the economic crisis

2018 ◽  
Vol 76 (2) ◽  
pp. 402-409
Author(s):  
Irini Tsikopoulou ◽  
Chris J Smith ◽  
Nadia K Papadopoulou ◽  
Elena Eleftheriadou ◽  
Ioannis Karakassis
Keyword(s):  
Economic Crisis ◽  
Eastern Mediterranean ◽  
Ecological Status ◽  
Ecosystem Approach ◽  
Fishing Effort ◽  
Fishing Ground ◽  
Ecological Studies ◽  
Ecological Quality Status ◽  
Traditional Fishing

AbstractFisheries have global socioeconomic and ecological effects. Long-term ecological studies could be beneficial to ecosystem approach management and biodiversity conservation, however, they are rare. In this study, the impacts of bottom trawling on a traditional fishing ground in the Eastern Mediterranean were addressed and an improvement in diversity metrics and ecological quality status were detected and ascribed to the Greek economic crisis. After 18 years, there was a modest increase in species richness, total abundance, and ecological status in the unaffected zone and more pronounced improvement in the trawled zone pointing at a possible link to a decrease in fishing effort. This upturn emphasized the strong link between financial activities and ecology. The present study underlines the multiple and variable effects of economy not only on countries and citizens but also on the environment and ecosystem conservation and management.

scholarly journals Variation in fisher skill is a major determinant of bycatch rates across species, gears, and fisheries

2021 ◽  
Author(s):  
Leslie Roberson ◽  
Chris Wilcox
Keyword(s):  
Threatened Species ◽  
Marine Mammals ◽  
Sea Turtles ◽  
Fishing Effort ◽  
Control Measures ◽  
Target Species ◽  
Marine Animals ◽  
Total Allowable Catch ◽  
Fishing Vessels ◽  
Fishing Fleets

Abstract Fisheries bycatch continues to drive the decline of many threatened marine species such as seabirds, sharks, marine mammals, and sea turtles. Management frameworks typically address bycatch with fleet-level controls on fishing. Yet, individual operators differ in their fishing practices and efficiency at catching fish. If operators have differing abilities to target species, they should also have differing abilities to anti-target bycatch species. We analyse variations in threatened species bycatch among individual operators from five industrial fisheries representing different geographic areas, gear types, and target species. The individual vessel is a significant predictor of bycatch for 15 of the 16 species-fishery interactions, including species that represent high or low costs to fishers, or have economic value as potentially targeted byproducts. Encouragingly, we found high performance operators in all five fishing sectors, including gears known for high bycatch mortality globally. These results show the potential to reduce negative environmental impacts of fisheries with incentive-based interventions targeting specific performance groups of individuals. Management of threatened species bycatch Incidental catch of marine animals in fishing gear ("bycatch") has been recognized as a serious problem for several decades. Despite widespread efforts to address it, bycatch remains one of the most pressing issues in fisheries management today, especially for threatened or protected species such as sea turtles, seabirds, elasmobranchs, and marine mammals1,2. The most common approaches to reducing bycatch have been command-and-control measures implemented across the entire fleet or industry, such as technology requirements or total allowable catch for particular bycatch species3,4. These conventional approaches have been far from universally successful, and have often performed worse in practice than models and trials suggested, even when the same approach is translated to a similar fishery5. The Skipper Effect Managing bycatch is a problem of fishing efficiency. Although management frameworks typically treat fishing fleets as a unit, several studies suggest that the skill of individual operators (the "skipper effect") could be a driver of important and unexplained variations in fishing efficiency. A skipper's skill is some combination of managerial ability, experience and knowledge of the environment, ability to respond to rapidly changing information and conditions at sea, and numerous other factors that are difficult to describe or record6. There is ongoing debate about the key components of operator skill and its importance in different contexts, such as different gears or technical advancement of fisheries7–10. Yet, numerous studies show consistent variation in target catch rates among anglers, skippers, or fishing vessels that is not explained by environmental variables or economic inputs7,11−13. This includes technically advanced and homogeneous fleets where a skipper's skill would seemingly be less important14. Previously, the skipper effect has been explored in relation to fishing efficiency and profitability (effort and target catch). However, if fishers have differing abilities to catch species they want, it follows that they would also have variable skill at avoiding unwanted species. Untangling the skipper effect is difficult without very detailed data, which are often not available for target catch and are extremely rare for bycatch. We capitalize on a rare opportunity to compare multiple high-resolution fisheries datasets that have information about both target and bycatch. We use fisheries observer data from five Australian Commonwealth fisheries sectors to answer three key questions: 1) Is there significant and predictable variation among operators in their target to bycatch ratios? We hypothesize that there are characteristics at the operator level that lead some vessels to perform worse than others on a consistent basis, and that operator skill is an important factor driving variations in bycatch across fishing fleets; 2) Does the pattern hold across species, gear types, and fisheries? We predict that, irrespective of the bycatch context, there are high performing operators that are able to avoid bycatch while maintaining high target catch; and 3) Does skipper skill transfer across species?” We posit that certain types of bycatch are inherently more difficult to avoid but expect to find correlations between bycatch rates, indicating that a skipper's ability to avoid one species extends to other types of bycatch. If these hypotheses hold true, then there exists untapped potential to reduce bycatch without imposing additional controls on fishing effort and gear. This would support an alternative approach to framing management questions such as those around threatened species bycatch. It may be that it is not a random event across a fishery, but in fact is an issue of particular low performance operators. In this case, measures aimed directly at those individual operators could be an opportunity to make considerable progress towards reducing threatened species bycatch, at potentially much lower cost than common whole-of-fishery solutions.

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