Adapting man, as an organic link, to closed loop control
systems, is increasingly presenting problems to designers of
systems of any nature. Performance of the human in the systems
is dependent upon a multitude of recognized factors, and
many as yet unknown factors and variables.
In order to investigate the...
In this paper we develop an index of economic vulnerability which we use conjointly with a more
conventional measure of income poverty to explore the different dimensions of poverty (transient, chronic, vulnerability) that affect fishing communities in developing countries. We illustrate the potential uses of this method with cross-sectoral data...
Small-scale fisheries in developing countries have often been perceived as a low-productivity, backward informal sector. As a result they are rarely considered as a possible entry point in poverty reduction and
rural development planning. Data collected in Democratic Republic of Congo show that this perception may not reflect the empirical...
This article gives insights on the complex balance between coalitions structure,
resource state or dynamics and agents’ heterogeneity to avoid bio-economic
collapses. A model bringing together coalition games and a viability approach
is proposed to focus on the compatibility between bio-economic constraints and
an exploited common stock dynamics. It is...
Today fish is the most traded food commodity in the World. This situation is not without generating potential issues. On the one hand, fish trade is said to support economic growth processes in developing
countries by providing an important source of cash revenue. On the other hand, fish trade is...
The arrival in the 1980s of cultured shrimp has induced large changes on the World shrimp market. In this new environment, the French Guyana fishery production now competes strongly with some of these farm-produced shrimp. Consequently, this fishery has experienced serious export problems during the last decade. This paper is...
The air‐seeding hypothesis predicts that xylem embolism resistance is linked directly to bordered pit functioning. We tested this prediction in trunks, roots, and branches at different vertical and radial locations in young and old trees of Pseudotsuga menziesii. Dimensions of bordered pits were measured from light and scanning electron micrographs,...
The cohesion-tension theory of water transport states that hydrogen bonds hold water molecules together and that they are pulled through the xylem under tension. This tension could cause transport failure in at least two ways: collapse of the conduit walls (implosion), or rupture of the water column through air-seeding. The...
It is usually assumed that most, if not all, small scale fishing communities, particularly in tropical countries, represents the poorest and most disadvantaged part of rural societies. As a result, these populations have been targeted for poverty alleviation by fisheries development programmes since the early 60's. Unfortunately many of these...
The volume and complexity of their vascular systems make the dynamics of long‐distance water transport in large trees difficult to study. We used heat and deuterated water (D₂O) as tracers to characterize whole‐tree water transport and storage properties in individual trees belonging to the coniferous species Pseudotsuga menziesii (Mirb.) Franco...