scholarly journals The effect of marine closures on a feedback control management strategy used in a spatially aggregated stock assessment: a case study based on pink ling in Australia

2017 ◽  
Vol 74 (11) ◽  
pp. 1960-1973 ◽  
Author(s):  
André E. Punt ◽  
Malcolm Haddon ◽  
L. Richard Little ◽  
Geoffrey N. Tuck
Keyword(s):  
Feedback Control ◽  
Reference Point ◽  
Management Strategy ◽  
Stock Assessment ◽  
Management Strategies ◽  
Target Level ◽  
Operating Model ◽  
Stock Size ◽  
Control Management

Simulation is used to explore the effect of spatial heterogeneity and spatial closures on the ability of feedback-control management strategies to achieve goals relating to conservation and utilization of fishery resources. The operating model underlying the projections is based on pink ling, Genypterus blacodes, off southern Australia and assumes that animals are sedentary following settlement. The management strategies are able to move the resource towards the target level in the absence of spatial closures even though assessment results are biased. The probability of reducing the stock below its limit reference point is higher when growth rates vary spatially, but the effect is small. The probability of the stock being above its target reference point is lower when one of the smaller spatial areas is closed. However, performance is markedly different when a larger fraction of the total area is closed, with stock size being substantially larger than the target at the end of the projection period.

Management strategies for spasmodic stocks: a Canadian Atlantic redfish fishery case study

2020 ◽  
Vol 77 (4) ◽  
pp. 684-702
Author(s):  
Roberto Licandeo ◽  
Daniel E. Duplisea ◽  
Caroline Senay ◽  
Julie R. Marentette ◽  
Murdoch K. McAllister
Keyword(s):  
Inventory Management ◽  
Management Strategy ◽  
Management Strategies ◽  
Trawl Survey ◽  
Eastern Canada ◽  
Strategy Evaluation ◽  
Management Procedures ◽  
Harvest Control Rule ◽  
Sebastes Mentella

There exist few recommendations for managing stocks with spasmodic recruitment, despite such stocks being not uncommon. Management procedures (MPs), developed for two species of redfish (Sebastes mentella and Sebastes fasciatus) in eastern Canada, are recommended for setting catch limits during periods of high and low abundance. A well-designed fishery-independent trawl survey is essential to provide advance warning of strong recruitment events and project future recruitment. Under an “inventory management” strategy, a more appropriate aim in spasmodic stocks may be to maximize the number of years with “good catches,” instead of maximizing total catches, as is traditionally considered in management strategy evaluation (MSE). Following a spasmodic recruitment event, an empirical harvest control rule based on larger fish delays the harvest of large cohorts by a few years, targets more commercially valuable fish sizes, and reduces the risk of growth overfishing. Capped MPs produced longer periods of large catches than uncapped MPs. MPs allowed for low harvests during periods of low abundance, thus avoiding unnecessary hardship in the industry. MPs evaluated here could be good candidates for other stocks with similar or less extreme recruitment variability.

scholarly journals Groundwater Modelling in Urban Development to Achieve Sustainability of Groundwater Resources: A Case Study of Semarang City, Indonesia

Water ◽  
2021 ◽  
Vol 13 (10) ◽  
pp. 1395
Author(s):  
Weicheng Lo ◽  
Sanidhya Nika Purnomo ◽  
Dwi Sarah ◽  
Sokhwatul Aghnia ◽  
Probo Hardini
Keyword(s):  
Groundwater Modeling ◽  
Groundwater Resources ◽  
Management Strategies ◽  
Production Capacity ◽  
Transient State ◽  
Deep Wells ◽  
Temporal And Spatial ◽  
Observation Wells ◽  
Control Management

Since 1900, Semarang City has been meeting its industrial water needs by pumping groundwater through its underlying aquifers. The trend toward exploiting groundwater resources has driven the number of deep wells and their production capacity to increase, and therefore leads to the water table to drop from time to time, which has been marked as one of the primary causes of land subsidence there. The main aim of the current study was to numerically model the temporal and spatial evolution of groundwater table under excess abstraction so that a groundwater management strategy can be accordingly drawn up for ensuing the sustainability of groundwater resources in the future. A series of numerical simulations were carried out to take into account hydrogeological data, artificial and natural discharges of deep wells, and boundary effects in Semarang City. The groundwater modeling is calibrated under two flow conditions of the steady state from 1970 to 1990 and the transient state from 1990 to 2005 for six observation wells distributed in Semarang City. Four scenarios that reflect potential management strategies were developed, and then their effectiveness was systematically investigated. The results of our study indicate that the implementation of proper groundwater control management and measure is able to restore the groundwater level to rise back in Semarang City, and in turn achieve the sustainability of groundwater resources.

scholarly journals Evaluation of the robustness of maximum sustainable yield based management strategies to variations in carrying capacity or migration pattern of Atlantic bluefin tuna (Thunnus thynnus)

2007 ◽  
Vol 64 (5) ◽  
pp. 837-847 ◽  
Author(s):  
Laurence T Kell ◽  
Jean-Marc Fromentin
Keyword(s):  
Carrying Capacity ◽  
Management Strategy ◽  
Stock Assessment ◽  
Management Strategies ◽  
Maximum Sustainable Yield ◽  
Reference Points ◽  
Sustainable Yield ◽  
Size Limit ◽  
Atlantic Bluefin Tuna ◽  
Spawning Stock

In this study, we examine the performances of current stock assessment methods with respect to their ability to (i) provide estimates of maximum sustainable yield (MSY), FMSY, and BMSY and (ii) assess stock status and exploitation level relative to MSY targets. The robustness of the current International Commission for the Conservation of Atlantic Tunas (ICCAT) management strategy is then evaluated with respect to uncertainty about the true population dynamics and contrasted with a simpler management strategy based solely on a size limit. Reference points are more robust to dynamic uncertainty than the estimates of absolute values and trends in F and spawning stock biomass. However, their performances depend on the underlying dynamics (they perform better when fluctuations come from changes in the carrying capacity than migration) and on when they are implemented relative to the intrinsic cycle of the population. Reference points based on F were less biased and more precise than those based on biomass and (or) yield. Although F0.1 appeared to be the best proxy for FMSY, it cannot indicate past and current levels of exploitation relative to FMSY when there is uncertainty about the dynamics. Finally, the F0.1 management strategy of ICCAT performed only slightly better than a simpler strategy based on size limit and led to lower catch levels.

scholarly journals Monte Carlo Simulation in Predicting the Level of Culinary Sales Revenue (Case Study at Radja Minas Padang)

2021 ◽  
Author(s):  
Muhammad Ihksan ◽  
Sarjon Defit ◽  
Yuhandri Yunus
Keyword(s):  
Monte Carlo Simulation ◽  
Monte Carlo ◽  
Management Strategy ◽  
Management Strategies ◽  
Accuracy Rate ◽  
Sales Revenue ◽  
The Monte Carlo Method ◽  
High Level ◽  
The City

Radja Minas is one of the culinary places located in the city of Padang with more than 30 employees. With the development of Radja Minas, of course, a good management strategy is needed. One way to do a revenue simulation, sales revenue simulation is a process of drawing or predicting sales. This study aims to predict the average sales revenue, so that it becomes a recommendation for use in making management strategies. The data processed in this research is sales data from 2017 to 2019 which comes from Radja Minas. This data will be processed using the monte Carlo method. The results of the tests that have been done have an accuracy rate of 92.66%. The high level of accuracy from the results of predictive data processing, this research is very precise and suitable for optimizing sales revenue. So that this research becomes a recommendation to be used in making a management strategy at Radja Minas in the future.

scholarly journals DANA INFAK SEBAGAI PONDASI KEUANGAN MASJID NAMIRA LAMONGAN

2020 ◽  
Vol 6 (8) ◽  
pp. 1553
Author(s):  
Hengky Asmarakandi ◽  
Noven Suprayogi
Keyword(s):  
Financial Management ◽  
Management Strategy ◽  
Management Strategies ◽  
Analytical Techniques ◽  
Qualitative Approach ◽  
Main Role ◽  
Analysis Techniques ◽  
Interviewing Techniques ◽  
Matching Techniques

The background of this research is the existence of zero infak phenomenon in Namira Lamongan mosque. This phenomenon encourages researchers to take research that discusses the financial management strategies used until the manager is brave in applying zero infak system. This research uses qualitative approach with case study strategy. Data collection is done through interviewing techniques with related parties and the documents concerned. Analytical techniques carried out in this research are the technique of source triangulation, pattern matching techniques, and descriptive qualitative analysis techniques. The results of this study indicate that the financial management strategy relies on the founders who are usually referred to as yayasan. The phenomenon of zero infak Namira mosque occurs because the mosque's expenditure is too large compared infak income. So the yayasan fund becomes the main role in covering all the shortcomings.Keywords: infak, financial management, mosque finance, Namira Lamongan Mosque

Changing management strategies of a government-hosted festival

2019 ◽  
Vol 10 (2) ◽  
pp. 174-188
Author(s):  
B. Shine Cho ◽  
Juye Lee ◽  
Wonkang Lee ◽  
Hyosang Min
Keyword(s):  
Management Strategy ◽  
Management Strategies ◽  
Collaborative Governance ◽  
Longitudinal Case Study ◽  
Content Type ◽  
Government Documents ◽  
Key Stakeholders ◽  
The Government ◽  
Strategy Changes

Purpose The purpose of this paper is to examine the management strategy changes of a government-hosted festival from the government’s perspective based on Ansell and Gash’s (2008) definitive criteria of collaborative governance. Design/methodology/approach This is a longitudinal case study of Hi Seoul Festival (HSF) in South Korea from 2003 to 2013. First, a detailed description of HSF management strategy change over time is presented through an analysis of internal government documents. Then, factors influencing management strategy changes are investigated through interviews with governmental and professional stakeholders. Findings The content analysis of the internal government documents reveals that HSF’s management strategy changed between collaborative governance and contracting out multiple times. The follow-up interviews then found that the prehistory experiences in managing festivals, the change of festival goals, and political leverages influenced the management strategy changes. Originality/value The government is one of the key stakeholders of festivals, which sometimes hosts and manages its own festivals. However, how a government manages its own festival is rarely studied. This study would add new insights into the studies of government-hosted festivals.

LIFE-OF-PROJECT ENVIRONMENTAL MANAGEMENT STRATEGY: CASE STUDY OF THE CONFEDERATION BRIDGE PROJECT, CANADA

1999 ◽  
Vol 01 (04) ◽  
pp. 429-439 ◽  
Author(s):  
JEFFREY L. BARNES ◽  
DAVID LEMON
Keyword(s):  
Environmental Management ◽  
Management Strategy ◽  
Management Strategies ◽  
Management Plan ◽  
Project Planning ◽  
Public Project ◽  
Eastern Canada ◽  
Environmental Management Strategies ◽  
Infrastructure Project

The developer of the Confederation Bridge Project in eastern Canada is successfully implementing a life-of-project environmental management strategy for this privately-funded public project. The cornerstone of this strategy is the Environmental Management Plan (EMP), an umbrella document which describes how the developer is managing all environmental aspects of the project throughout the construction phase and the subsequent 35-year period of private ownership. The EMP is comprised of several dynamic plans and programmes. Owing to unique circumstances, the EMP was developed prior to the completion of the environmental assessment, providing an example of the benefit of such, especially for a finance-build-own-operate-transfer infrastructure project. The experience of this project leads to the conclusion that the use of environmental management systems to encapsulate environmental management strategies early in project planning would be beneficial.

scholarly journals Management Strategies of Professional Zakat Funds for Mustahiq Family Welfare By Amil Zakat Body

2019 ◽  
Vol 1 (1) ◽  
pp. 39-51
Author(s):  
Muhammad Iqbal ◽  
Rusli Rusli ◽  
Musyahidah Musyahidah
Keyword(s):  
Qualitative Research ◽  
Data Analysis ◽  
Data Collection ◽  
Data Reduction ◽  
Management Strategy ◽  
Management Strategies ◽  
Family Welfare ◽  
Fund Management ◽  
Triangulation Method

This research deals with a professional zakat fund management strategy for mustahiq family welfare by Zakat Amil Body of Palu City Badan Amil Zakat. This research is qualitative research that tried to reveal and interpret this developing phenomenon. This is a case study that used such data collection techniques such as observation, interview, and documentation, while data analysis includes data reduction, presentation, and verification which ends with checking the validity of the data with the source triangulation method. The result showed that zakat collection units receive all kinds of charity such as infaq, sadaqah, as well as profession zakat that muzakkiwill to pay. Second is direct acceptance; that is, a zakat payer comes directly to the Baznas Office to hand over zakat, infaqand sadaqah (ZIS) to the officers in Baznas. The distribution is carried out in two ways: first, mustahiqs are given what they need in terms of daily basic necessities; secondly, aid is given to mustahiqs who have business to help them develop their business.

Liquid waste management strategies for coastal areas

2002 ◽  
Vol 46 (8) ◽  
pp. 169-175 ◽  
Author(s):  
M.N. Alpaslan ◽  
D. Dölgen ◽  
A. Akyarli
Keyword(s):  
Waste Management ◽  
Management Strategy ◽  
Management Strategies ◽  
Liquid Waste ◽  
Coastal Areas ◽  
Point Of View ◽  
Decision Makers ◽  
Challenging Issue

Liquid waste management in coastal areas is a challenging issue, because recipe solutions applied so far have not met the expectations fully. Therefore decision-makers, planners, engineers as well as the inhabitants of these places are looking for a better approach that will adequately handle the problem and perform reliable solutions. It is the aim of this paper to review the recent situation of liquid waste management for coastal areas in general, and discuss it from the point of view of Turkey in particular. A simple and applicable waste management strategy is also proposed in the paper and its merits are illustrated in a case study. Finally, anticipating the wide applications of such systems in coastal establishments, some recommendations are forwarded.

scholarly journals An Ethical Assessment on the Management of Sika Deer in Scotland; With Particular Reference to Hybridisation with Native Red Deer

2015 ◽  
Vol 4 (2) ◽  
pp. 13-27
Author(s):  
Sarah Malcolm
Keyword(s):  
Wildlife Management ◽  
Management Strategy ◽  
Red Deer ◽  
Sika Deer ◽  
Invasive Alien Species ◽  
Management Strategies ◽  
Genetic Integrity ◽  
Optimal Management ◽  
Ethical Assessment

Globalisation and invasive alien species (IAS) are creating current and damaging effects worldwide. Wildlife management is necessary to preserve the biodiversity of our global flora and fauna, whilst balancing the needs of people with those of wildlife. It is imperative to work to achieve the optimal management strategy on various levels from financial, to ethical and practical. The genetic integrity of Scotland’s native red deer is threatened, following the introduction of sika deer and subsequent hybridisation. This review summarises the problems and potential management strategies associated, as a case study for IAS policy. ?

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