The Experts below are selected from a list of 1785 Experts worldwide ranked by ideXlab platform

François Le Loc’h - One of the best experts on this subject based on the ideXlab platform.

  • A spatio-temporal ecosystem model to simulate fishing management plans: A case of study in the Gulf of Gabes (Tunisia)
    Marine Policy, 2016
    Co-Authors: Ghassen Halouani, Khaled Abdou, Tarek Hattab, Mohamed Salah Romdhane, Frida Ben Rais Lasram, François Le Loc’h
    Abstract:

    The Gulf of Gabes located in southern Tunisia is one of the most productive ecosystems in the Mediterranean Sea. Despite its ecological importance, it is subject to high fishing pressure affecting the different components of the ecosystem. Given the multispecies, multigear nature of the Fishery, there is a need to manage trade-offs between environmental and economic objectives. In this study, an Ecospace model was developed based on the previously constructed Ecopath model of the Gulf of Gabes and calibrated for the period 1995-2008 to investigate the response of the ecosystem to a set of alternative spatial management scenarios. These scenarios were derived from the current Fishery Regulation owing the important interest expressed by local Fishery managers to assess new management measures. The results showed for each management scenario how bottom trawling and coastal fishing impact the different trophic groups and the complexity of interaction between these two fishing activities. Furthermore, spatially explicit simulations were performed to identify regions where the management measures are effective. Results suggested that for some trophic groups, these regions are well-defined which would be interesting to propose more accurate spatial measures. Finally, several indicators were calculated to evaluate the proposed management plans and provide managers with a straightforward set of decision rules to describe the potential trade-offs and fulfill both fisheries and conservation management objectives in the context of an ecosystem approach. The decision rules were based on observed trends to reduce uncertainty relative to the model complexity and provide consistent advice to decision makers.

Patrice Brehmer - One of the best experts on this subject based on the ideXlab platform.

  • Can overexploited fisheries recover by self-organization? Reallocation of fishing effort as an emergent form of governance
    Marine Policy, 2018
    Co-Authors: T. Brochier, P. Auger, D. Thiao, A. Bah, T. Nguyen-huu, Patrice Brehmer
    Abstract:

    Owing to high costs and difficulties in implement control, fisheries are less regulated than terrestrial activities. In areas of weak governance, self-Regulation is often the rule. Understanding the underlying bio-economic mechanisms that drive such Fishery systems is crucial for decision making on how to support real fishermen communities. Fishing effort reallocation occurs when economic yield drops, suggesting a feedback between fishermen's mobility and local overexploitation. The nature of this feedback is addressed here by using a bio-economic modelling approach applied to a Senegalese Fishery. The white grouper is a highly valued commercial fish that has suffered intense exploitation in Senegal and was predicted to collapse due to a lack of Fishery Regulation combined with high demand. Surprisingly, our analysis of landings and associated price variability suggests that a slow recovery of this Fishery is now underway. Motivated by this finding, two models were implemented that account for artisanal fishermen's mobility and variable prices. Both models provided the same insight: fishing effort mobility combined with variable fish prices induced a shift from local overexploitation to sub-regional sustainable exploitation. Considering that fishing effort mobility has steeply increased in recent years, this mechanism might have significantly contributed to the recent observed trends in prices and landings for this Fishery. More generally, these bio-economic models suggest that spatial reallocation of fishing effort acts as emergent governance in under regulated areas that allows, in some cases, the recovery of an overexploited species.

Miftachul Munir - One of the best experts on this subject based on the ideXlab platform.

  • Perception of Cantrang Fishermen to the Minister of Marine and Fishery Regulation Number 2 / 2015
    Economic and Social of Fisheries and Marine, 2017
    Co-Authors: Yuyun Suprapti, Rudianto Syamsu Dhuha, Miftachul Munir
    Abstract:

    Regulation of the Minister of Marine Affairs and Fisheries No. 2 / 2015 about the prohibition of the use of cantrang in the State Fishery Management Area of the Republic of Indonesia is an effort of the Government to anticipate the destructive fishing, namely environmental damage and decrease of fish resources. The purpose of this research is to know repulsion and acceptability of cantrang fisherman to that Regulation. This descriptive research uses data collection techniques through surveys, interviews and documentation, and using questionnaires. This Regulation has an impact on the cantrang fishing vessel should not operate, this causes unemployment for the crew, if the government implements that Regulations then every ship does not require many crew. The existence of the prohibition of the use of cantrang nets cause increasing of the unemployment rate, when someone does not work it means that income begins to be hampered. On the other hand, the Regulation has a positive impact for the future in the form of sustainable of marine ecosystem. Keywords: perception, fishermen, fisheries and marine minister Regulation no 2/2015, cantrang

  • perception of cantrang fishermen to the minister of marine and Fishery Regulation number 2 2015
    ECSOFiM (Economic and Social of Fisheries and Marine Journal), 2017
    Co-Authors: Yuyun Suprapti, Rudianto Syamsu Dhuha, Miftachul Munir
    Abstract:

    Regulation of the Minister of Marine Affairs and Fisheries No. 2 / 2015 about the prohibition of the use of cantrang in the State Fishery Management Area of the Republic of Indonesia is an effort of the Government to anticipate the destructive fishing, namely environmental damage and decrease of fish resources. The purpose of this research is to know repulsion and acceptability of cantrang fisherman to that Regulation. This descriptive research uses data collection techniques through surveys, interviews and documentation, and using questionnaires. This Regulation has an impact on the cantrang fishing vessel should not operate, this causes unemployment for the crew, if the government implements that Regulations then every ship does not require many crew. The existence of the prohibition of the use of cantrang nets cause increasing of the unemployment rate, when someone does not work it means that income begins to be hampered. On the other hand, the Regulation has a positive impact for the future in the form of sustainable of marine ecosystem. Keywords: perception, fishermen, fisheries and marine minister Regulation no 2/2015, cantrang

Kenneth R. Stollery - One of the best experts on this subject based on the ideXlab platform.

  • R. A stochastic dynamic programming model of bycatch control in fisheries
    Marine Resource Economics, 1994
    Co-Authors: Robert A. Androkovich, Kenneth R. Stollery
    Abstract:

    This paper builds a model of Fishery Regulation with incidental catch or bycatch and simulates it with parameters from the Nova Scotia cod and haddock fisheries. When comparing optimal coordinated taxation with the independent taxation of each Fishery separately, we find that independent taxation requires significantly higher tax rates to control the stock externality associated with competitive behaviour. Quotas are found to be suboptimal relative to any form of taxation, because of their inflexibility in the presence of uncertainty, and because they can control bycatch only indirectly.

William D. Bryan - One of the best experts on this subject based on the ideXlab platform.