Bioeconomic Production Function in Fisheries: Theoretical and Empirical Analysis

1983 ◽  
Vol 40 (7) ◽  
pp. 968-982 ◽  
Author(s):  
Rögnvaldur Hannesson
Keyword(s):  
Production Function ◽  
Capital Intensity ◽  
Fishing Effort ◽  
Fish Abundance ◽  
Fish Stock ◽  
Fisheries Economics ◽  
Independent Variables ◽  
Fishing Vessels ◽  
Frontier Production Function ◽  
Traditional Fishing

The traditional "fishing effort" approach to fisheries economics implies the existence of a production function with fishing effort and fish abundance as independent variables. It is shown how the existence of bionomic equilibrium depends on the shape of this production function, as well as the demand and effort cost functions. The analysis is related to the recent discussion of collapses in fisheries occurring as a result of fish availability being inversely related to fish abundance. A Cobb–Douglas production function, with effort and fish biomass as independent variables, is estimated for the Lofoten fishery. This indicates that the availability coefficient increases as the fish stock is depleted. Finally, the fishing effort approach is integrated with neoclassical production analysis. Fishing effort is regarded as being produced by labor and capital, and an effort frontier production function is estimated for selected Norwegian fisheries. This makes it possible to estimate optimal vessel size and capital intensity. Fishing vessels appear to be undersized but not too capital intensive.

scholarly journals PENINGKATAN KINERJA SISTEM PROPULSI KAPAL PENANGKAP IKAN TRADISIONAL TYPE PURSEINE 30 SD 90 GT MENGGUNAKAN SISTIM PROPULSI HYBRID

2011 ◽  
Vol 16 (2) ◽  
pp. 106
Author(s):  
Mohd Ridwan
Keyword(s):  
Economic Value ◽  
Motor Fuel ◽  
Cost Savings ◽  
Fishing Effort ◽  
Propulsion Systems ◽  
Hybrid Propulsion ◽  
Ship Propulsion ◽  
Fishing Vessels ◽  
Main Engine ◽  
Traditional Fishing

Mohd Ridwan, in this paper explain that traditional fishing vessels built in the shipyard of the people is a cultural heritage which needs to be conserved, and empowered through the application of ship science and technology to build fishing boats for fishermen of all types, shapes and sizes of ships, equipped with fishing technology. Repairs to the feasibility of traditional fishing vessels to sail like stability, ship construction needs to be done. Similarly, his case should be applied to ship propulsion technology that remained operational needs based on size of vessel forms and types of fishing vessels. The design of an appropriate propulsion can provide benefits in the form of operational cost savings by more than 10% through the use of hybrid propulsion systems. Hybrid propulsion system is a mix of main engine (motor fuel or gas fuel MDO) with electric motor and propeller to suit the use of hull form and ship propulsion systems (matching the propeller and engine) is at the core of this concept in this article and next to be research. Besides these traditional ship the product to be supported primarily by imposing government standards for a fishing vessel, for fishermen as users can easily calculate the economic value of investment will they planted in fishing effort at sea. Keywords : Fishing Boat Traditional, Hybrid Propulsion, Main Engine, Propeller, Operatinal Cost.

Optimal number of sites in artificial pelagic multisite fisheries

2010 ◽  
Vol 67 (2) ◽  
pp. 296-303 ◽  
Author(s):  
Pierre Auger ◽  
Christophe Lett ◽  
Ali Moussaoui ◽  
Sylvain Pioch
Keyword(s):  
Linear Chain ◽  
Fishing Effort ◽  
Optimal Number ◽  
Fish Stock ◽  
Total Catch ◽  
Fleet Size ◽  
Fishing Vessels ◽  
Total Fish ◽  
Fish Aggregating Devices ◽  
Global Activity

We present a mathematical model of artificial pelagic multisite fisheries. The model is a stock–effort dynamical model of a fishery subdivided into artificial fishing sites such as fish-aggregating devices (FADs) or artificial habitats (AHs). The objective of the work is to investigate the effects of the number of sites on the global activity of the fishery. We consider a linear chain of fishing sites in which fish are harvested by fishing vessels and a free stock that is unattached to the sites and not exploited. Fish movements between the sites and the free stock, as well as vessel displacements between the sites, are assumed to take place at a faster time scale than the variation of the stock and the change of the fleet size. We take advantage of these two time scales to derive a reduced model governing the dynamics of the total fish stock and the total fishing effort. We show that there exists an optimal number of fishing sites that maximizes the total catch at equilibrium. We finally extend the model to the situation in which both fish attached to the sites and fish in the free stock are exploited.

scholarly journals The global network of ports supporting high seas fishing

2021 ◽  
Vol 7 (9) ◽  
pp. eabe3470
Author(s):  
Jorge P. Rodríguez ◽  
Juan Fernández-Gracia ◽  
Carlos M. Duarte ◽  
Xabier Irigoien ◽  
Víctor M. Eguíluz
Keyword(s):  
Fishing Effort ◽  
Global Network ◽  
Automatic Identification ◽  
Identification System ◽  
Middle Income ◽  
Middle Income Countries ◽  
Fishing Vessels ◽  
National Jurisdiction ◽  
The Commons ◽  
High Seas

Fisheries in waters beyond national jurisdiction (“high seas”) are difficult to monitor and manage. Their regulation for sustainability requires critical information on how fishing effort is distributed across fishing and landing areas, including possible border effects at the exclusive economic zone (EEZ) limits. We infer the global network linking harbors supporting fishing vessels to fishing areas in high seas from automatic identification system tracking data in 2014, observing a modular structure, with vessels departing from a given harbor fishing mostly in a single province. The top 16% of these harbors support 84% of fishing effort in high seas, with harbors in low- and middle-income countries ranked among the top supporters. Fishing effort concentrates along narrow strips attached to the boundaries of EEZs with productive fisheries, identifying a free-riding behavior that jeopardizes efforts by nations to sustainably manage their fisheries, perpetuating the tragedy of the commons affecting global fishery resources.

Statistical Bias Problem in On-Site Surveys: the Severity of the Problem and its Potential for Solution

1975 ◽  
Vol 32 (12) ◽  
pp. 2520-2524
Author(s):  
William F. Sinclair ◽  
R. W. Morley
Keyword(s):  
Fishing Effort ◽  
Recreational Fisheries ◽  
Statistical Bias ◽  
Relative Probability ◽  
Fishing Vessels ◽  
Frequency Of Use ◽  
Unbiased Estimates ◽  
Weighting Procedures ◽  
Use Category

Commercial and recreational fisheries managers often develop catch and effort estimates from information gathered in location or on-site surveys. However, a limited on-site sample cannot produce unbiased estimates of fishing effort or socioeconomic traits of the anglers unless weighting procedures are adopted to account for the varying frequencies of fishing of the fishermen. The corrective procedure involves establishing the relative probability of capturing a fisherman in the sample, then weighting the number of contacts with anglers in each frequency of use category. Unless information on the probability of including particular fishermen and fishing vessels in the sample is available the sample must be drawn with replacement.

Factors affecting the performance of the traditional fisheries fishing effort in the regency of Kubu Raya, West Borneo

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Sigit Sugiardi ◽  
Jamhari Jamhari ◽  
Slamet Hartono ◽  
Lestari Rahayu Waluyati
Keyword(s):  
Environmental Economics ◽  
Structural Equation ◽  
Fishing Effort ◽  
Partial Least Square ◽  
Least Square ◽  
Cultural Environment ◽  
Direct Influence ◽  
Analysis Model ◽  
Content Type ◽  
Traditional Fishing

Purpose This study aims to explain the factors that affect the performance of traditional fishing business at Kubu Raya Regency of West Borneo Province. Design/methodology/approach The method used in this research is quantitative method. The research location in Kubu, Padang Tikar and Teluk Pakedai sub-districts of Kubu Raya Regency of West Borneo Province, considering the location is the target of CCDP-IFAD in Kubu Raya district. The data analysis model in this research is done by using structural equation model (SEM) approach with assisted WarpPLS program (partial least square development). Findings Based on the results of the analysis of SEM, it is revealed that the direct influence of the six dependent variables the environment of the individual fisherman, regulatory and government policy, environmental economics, a social-cultural environment, managerial capacity and the sustainability of the business aspects of ecological management affect directly toward traditional capture fisheries business performance, only empowerment that is not directly influential on performance of traditional capture fisheries business. Originality/value The originality in this study is shown in the objectives and variables used in the research, i.e. individual environmental variables of fishermen, government policies and regulations, economic environment, social-cultural environment, empowerment, management capacity and business sustainability influence the performance variable of traditional fishing business. In addition, there is a direct influence, allegedly there is an indirect influence on the variables empowerment of the performance of fishery business.

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 The Frontier Production Function: A Tool for Improved Decision Making

1980 ◽  
Vol 9 (2) ◽  
pp. 1-10 ◽  
Author(s):  
Richard A. King
Keyword(s):  
Decision Making ◽  
Production Function ◽  
Best Practice ◽  
Processing Plant ◽  
Technical Knowledge ◽  
Production Processes ◽  
Frontier Production Function ◽  
Enterprise Budgets

A frontier production function may be thought of as a “best practice” production function (Førsund and Jansen) or a function that expresses the maximum product obtainable from various combinations of factors given the existing state of technical knowledge. It is the theoretical counterpart to farm enterprise budgets or processing plant budgets derived by economic engineering methods to describe the best possible production processes.

scholarly journals Infrastruktur Jalan Terhadap Peningkatan Kinerja Ukm Tas

INOVATOR ◽  
2018 ◽  
Vol 7 (2) ◽  
pp. 168
Author(s):  
Leny Muniroh
Keyword(s):  
Production Function ◽  
Data Use ◽  
Secondary Data ◽  
T Test ◽  
Positive Sign ◽  
Infrastructure Development ◽  
Independent Variables ◽  
Medium Enterprise ◽  
Positive Effect ◽  
Observation Period

<p>The research objective are to analyze handbag Small-Medium Enterprise (SME) performance and the effect of infrastructure development on MSE performances in Bojong Rangkas Village, District of Ciampea, Bogor Regency. The research conducted from Pebruary to May 2010. Primary and secondary data use to the purposes. The sampling consisted of 30 SME respondents for observation period 2008 and 2009. The production function specified using Cobb-Douglass. The regression results indicated the model significant at ? = 0.05. Sig-t test indicates that all independent variables shows positive sign. At ? = 0.30, labor (0.172), material (0.000) and dummy year (0.272) has positive and significant effect on production. This result indicate that road infrastructre development has positive effect on handbag SME production. As reccomendation, there is a need another support such as soft infrastructure (training) to realize the location as center of handbag SME in the regency</p>

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