Optimal Harvest Strategies in a Fisheries Management Model

The Schaefer-Gordon model of fisheries management does not adequately predict the state of stocks or the behavior of fishermen. In any scientific discourse, this should call the basic assumptions into question. I review the challenges to the model's biological assumptions and argue that its economic assumptions are also flawed. I review the approach developed by A.V. Chayanov for studying peasant economies in conjunction with comparative data on other fisheries and data from Mississippi Shrimpers to show that Chayanov's model characterizes the shrimpers of Mississippi. From the comparative and ethnographic data, I conclude that fishermen do not operate as firms. This further calls into question the adequacy of the current fisheries management model and raises the question of how and why such an inadequate model is perpetuated.

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Evaluation of current and alternative fisheries management scenarios based on spawning-per-recruit (SPR), revenue-per-recruit (RPR), and yield-per-recruit (YPR) diagrams

ICES Journal of Marine Science ◽

10.1016/j.icesjms.2005.04.002 ◽

2005 ◽

Vol 62 (5) ◽

pp. 841-846 ◽

Cited By ~ 6

Author(s):

T. Katsukawa

Keyword(s):

Fisheries Management ◽

Numerical Optimization ◽

Management Strategy ◽

Management Strategies ◽

Management Scenarios ◽

Trade Off ◽

Contour Lines ◽

Stock Assessments ◽

Optimal Harvest ◽

Yield Per Recruit

Abstract Spawning-per-recruit (SPR) and yield-per-recruit (YPR) analyses are widely used in stock assessments of exploited fish populations. In decision-making for fisheries management, the trade-off between fisheries production (YPR) and stock reproduction (SPR) is important. The general outputs of SPR and YPR analysis, such as single variate plots with contour lines or optimal harvest strategies estimated by numerical optimization, are inappropriate in obtaining an overview of the trade-off. This paper introduces a diagram that expresses graphically the bivariate trade-off between YPR and SPR. The method was applied to chub mackerel (Scomber japonicus) data, and two management scenarios were compared using the SPR–YPR diagram. Differences between YPR and revenue-per-recruit (RPR) were also considered. The results showed that: (i) current estimated fishing mortality is suggestive of growth-overfishing, and there is room for improving SPR and YPR simultaneously; (ii) increasing the age at first capture is more effective than effort control; (iii) management strategies that maximize landing weight or revenue are significantly different. The management strategy that maximizes landing weight, when considered from the viewpoint of maximizing revenue, results in growth-overfishing.

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PENERAPAN PRINSIP GOOD GOVERNANCE DALAM PERATURAN PENGELOLAAN PERIKANAN YANG BERKELANJUTAN DI INDONESIA

Justitia et Pax ◽

10.24002/jep.v35i1.2190 ◽

2019 ◽

Vol 35 (1) ◽

Author(s):

Rizky Septiana Widyaningtyas

Keyword(s):

Fisheries Management ◽

Rule Of Law ◽

Qualitative Method ◽

Good Governance ◽

Community Empowerment ◽

Management Model ◽

Conceptual Approach ◽

The Rule Of Law ◽

Regulation Model ◽

The Ideal

This study aims to know and analyze and examine the realization of good governance principles in fisheries management regulation in Indonesia; analyze and formulate the ideal fisheries management regulation model in accordance with the concept of good governance.This research is normative juridical research, which is research that puts law as a building of norm system, consisting of principles, norms, rule of law, judgment, agreement, and doctrine. The approach used in this normative legal research is the statute approach and the conceptual approach. The data obtained were analyzed by qualitative method. Based on data analysis, it can be concluded that 1) Realization of 8 Main Characteristics of good governance according to UNESCAP are participation, orientation on consensus, accountable, transparent, responsive, effective and efficient, fair and inclusive and follow the rule of law in law, and efficient that cannot be applied; 2) The ideal fisheries management model in accordance with the principle of good governance is a co-management model, because this model use community empowerment and involve all stakeholders as well.

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Prospek Pengelolaan Sumber Daya Perikanan Berbasis Ekosistem: Studi Empiris Di Karimunjawa*

Jurnal Ekonomi Pembangunan Kajian Masalah Ekonomi dan Pembangunan ◽

10.23917/jep.v14i1.148 ◽

2013 ◽

Vol 14 (1) ◽

pp. 16

Author(s):

Indah Susilowati

Keyword(s):

Fisheries Management ◽

Meta Analysis ◽

Pilot Project ◽

Current Situation ◽

Descriptive Statistics ◽

Management Model ◽

Good Prospect ◽

New Paradigm ◽

Management Models ◽

Initial Strategy

The objectives of the study are: to compare the model of fisheries management with conventional versus new paradigm; to explore the prospect of new fisheries management model; to formulate the initial strategy of fisheries management model using EBFM. The ecosystem of Karimunjawa is selected as the pilot project of this research. The competent 25 keypersons were selected using purposive quoted sampling for interview. Descriptive statistics, meta-analysis and AHP were employed to analize the data. The results showed that the conventional fisheries management models were rather ineffective to answer the current situation of fisheries resource. We need facing out to find a suitable approach of fisheries management model. One of the proposed new paradigm is EBFM. This model indicates has a good prospect to manage the fisheries resource in the study area. This study suggests that EBFM model should be under-tried out. If it is acceptable, then the model can be implemented for other region.

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Chances and Challenges of Local Wisdom as a Management Model Toward Sustainable Fisheries

E3S Web of Conferences ◽

10.1051/e3sconf/202131701055 ◽

2021 ◽

Vol 317 ◽

pp. 01055

Author(s):

Dian Patria Keliat ◽

Amirudin Amirudin ◽

Yanuar Luqman

Keyword(s):

Data Analysis ◽

Fisheries Management ◽

Customary Law ◽

Management Model ◽

Advantages And Disadvantages ◽

The People ◽

Current Perspective ◽

The One ◽

Strong Concept ◽

Conservation Method

Indonesia is rich in local wisdoms, including in fisheries management. Fisheries management by applying local wisdom is an effort to utilize fisheries resource based on traditional noble values designated to people’s welfare. Research aims to collect and analyse local wisdoms related to fisheries management in Indonesia, the concepts offered, their advantages and disadvantages, as well as efforts for their conservation. Method applied in this research is literature review, main articles collected from international and national journals, and other relevant resources as supportive data. Analysis on 24 articles show that there are 3 fisheries local wisdoms which have been researched the most: Panglima Laot-Adat Laot, kewang-sasi, and awig-awig. Panglima Laot in Aceh is considered to be the one that has strong concept and more advantages as compared to others. However, violations to its customary law still take places. Noted also that researches are not exploring the perspective of the people who are regulated by related local wisdoms. Efforts to conserve local wisdoms by building the capacity and integrating their values into formal law as management model is required. Increasing violations against Panglima Laot-Adat Laot customary law, thus, suggest research to explore people’s current perspective toward local wisdom.

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PROSPEK PEMANFAATAN SUMBER DAYA IKAN ENDEMIK DI PERAIRAN UMUM DARATAN ZONA WALLACEA DALAM MENDUKUNG PEMBANGUNAN EKONOMI MASYARAKAT

Jurnal Kebijakan Perikanan Indonesia ◽

10.15578/jkpi.6.1.2014.43-53 ◽

2014 ◽

Vol 6 (1) ◽

pp. 43 ◽

Cited By ~ 1

Author(s):

Endi Setiadi Kartamihardja

Keyword(s):

Fisheries Management ◽

Invasive Alien Species ◽

Ornamental Fish ◽

Management Model ◽

Fish Diversity ◽

Inland Waters ◽

Conservation Areas ◽

Fish Resources ◽

Management Measure ◽

Endemic Fish

Perairan umum daratan yang meliputi ekosistem danau, waduk, sungai, rawa banjiran dan rawa merupakan Wilayah Pengelolaan Perikanan Republik Indonesia. Zona Wallacea yang meliputi Pulau Sulawesi dan Nusa Tenggara, masing-masing didominasi oleh ekosistem danau dan embung (waduk). Keanekaragaman ikan di perairan umum daratan zona Wallacea sebagian besar termasuk spesies ikan endemik yang tidak ditemukan di perairan Paparan Sunda dan Sahul. Ancaman terhadap kelestarian sumber daya ikan endemik merupakan isu sentral yang harus segera ditanggulangi. Keunikan sumber daya ikan endemik di zona Wallacea memerlukan model pemanfaatan dan pengelolaan tersendiri yang tidak dapat disamakan dengan model pengelolaan sumber daya ikan di Paparan Sunda dan Sahul. Langkah-langkah pengelolaan sumber daya ikan endemik dalam rangka pemanfaatannya bagi pembangunan ekonomi masyarakat meliputi: pemanfaatan sumber daya ikan endemik sebagai ikan hias potensial; pelestarian sumber daya ikan endemik melalui penetapan kawasan konservasinya; pengendalian spesies ikan asing invasif; pengembangan pembenihan ikan endemik dan restocking; revitalisasi kearifan lokal dan pengembangan ko-manajemen. Inlandwaters ecosystems which covering lakes, reservoirs, rivers, swamps and floodplains area is Regional Fisheries Management of Republic of Indonesia. Wallacea zone which includes the island of Sulawesi and Nusa Tenggara dominated by lakes ecosystems and small reservoirs, respectively. Fish diversity in inland waters of Wallacea zone mostly dominated by endemic fish species that are not found in the inlandwaters of Sundaland and Sahulland. The threat to the conservation of endemic fish resources is a central issue that must be addressed. The uniqueness of endemic fish resources in Wallacea zone requires a management models that may not be equal with a management model of fish resources in Sundaland or Sahulland. A management measure of endemic fish resources in Wallacea zone for economic development of the society should include: utilization of endemic fish resources as an ornamental fish potential; preservation of endemic fish resources through the establishment of conservation areas; controlling invasive alien species; development of endemic fish hatcheries and restocking; revitalization of local knowledge and the development of fisheries co-management.

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Productivity and Management of Renewable Resources: Why More Efficient Fishing Fleets Should Fish Less

Environmental and Resource Economics ◽

10.1007/s10640-021-00633-2 ◽

2022 ◽

Author(s):

Eric Nævdal

Keyword(s):

Steady State ◽

Fisheries Management ◽

Renewable Resources ◽

State Level ◽

Harvest Rate ◽

Stock Size ◽

Optimal Harvest ◽

Productivity Increase ◽

Resource Stock ◽

Fishing Fleets

AbstractThis article analyses the effect of productivity improvements on optimal fisheries management. It is shown that when harvest costs are independent of resource stock and the stock is below its steady state level, then for any given stock it is optimal to reduce harvest levels in response to a productivity increase unless optimal harvest rate is already zero. If harvest costs are stock dependent this result is modified; for stock dependent harvest costs there exists an interval of stock sizes below the steady state where it is optimal to reduce the harvest rate for any given stock size whereas if the harvest rate is close to an economically optimal steady state it is optimal to increase the harvest rate.

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