So-called « technical measures », aimed at increasing selectivity in the fishing industry, are expected to provide several social benefits. However, selectivity also generates costs: direct private cash costs such as gear cost but mainly costs based on the fact that selectivity usually decreases the short-run catch per unit of...
Poor selective gears like bottom trawlers are known to induce joint productions ie catch of several categories of fish by targeting one category in particular. Joint productions can be inter-species or intra-species. They can be retained to be sold or discarded most of the time with high mortality rates when...
Quota allocation mechanisms have distributional effects with important issues concerning the economic organization of the fishery and acceptability. Yet, these distributional effects are rarely studied. In France, where fishing rights are not transferable, the quotas are shared between producer cooperatives based on the historical landings of their members. Each cooperative...
This paper proposes a formal analysis of the discarding issue including the sorting labour costs. Empirical evidences from an application to the Nephrops fishery in the Bay of Biscay show that sorting is an important time consuming activity on board and a factor of discarding. However existing literature does not...
Mediterranean fisheries are characterized by a high diversity of fishing
strategies that can be differentiated according to a gradient from the coast
to the offshore area. Over the gradient, fleets interact through the resource.
The paper first provides a description of the fishing strategies and proposes
a typology for the...
Marine scientists and stakeholders are increasingly advocating ecosystembased
fishery management (EBFM). However, the way to operationalize
such EBFM remains controversial. The viability approach can be a relevant
modelling framework for EBFM as it accounts for dynamic complexities,
uncertainties, risks and sustainability objectives balancing ecological,
economic and social dimensions together with...
A vessel-based bio-economic model (IAM) is presented and applied to the Bay of Biscay sole fishery to investigate alternative quota management systems from a multi-criteria perspective. For this study, the model integrates several institutional arrangements related to catch share management. The current French co-management system with non-transferability of quota is...
Integrating governance mechanisms into bio-economic modeling tools is a key challenge for the assessment of fisheries management plans. Impact assessments are carried out without considering real management options and institutional context. Only fishing mortality changes and their impact on fish stocks are considered. The Bay of Biscay sole fishery offers...
In multi-species fisheries, technical and social interactions between different components of the fisheries can make it difficult to maximize economic yield. Furthermore, the different fish stocks contributing to the overall catch may present different levels of natural variability leading to difficulties in determining optimal management strategies. Bio-economic performances of multi-species...
Granting catch shares to cooperatives is a fisheries management option that has been widely applied. Although fishery cooperatives systems around the world are structured in various ways, it appears that most share the characteristic that members of the same cooperative are jointly and severally liable for not exceeding collectively assigned...