نتایج جستجو برای: subsistence fishing

تعداد نتایج: 16560  

Journal: :Bulletin of the American Society for Information Science and Technology 2005

2002
Rousseau’s Whale Hunt Michael S. Alvard David A. Nolin

In spite of its common use as a tool for examining cooperation, the prisoner’s dilemma game does not conform to the reality of many socio-ecological contexts. Situations in which people engage in joint activities and maintain agreement in their preferences for outcomes are called “coordination games” by game theorists and “mutualism” by biologists. Coordination games are common, but cooperative...

2005
J. D. SCHUMACHER GORDON H. KRUSE

The new research reported in this special issue of Fisheries Oceanography expands our understanding of the Aleutian Archipelago ecosystem. Yet our knowledge remains very limited, while the use of this ecosystem for commercial activities, recreation and other purposes expands. Given this situation, how can we sustain the ecosystem services (food, fuel, fibers as well as spiritual, recreational, ...

2002
E. Baran

This article deals with the importance of finfish that are not sold on any market. We detail two major points of view: the ecological significance of larvae and juveniles for future harvests, and the importance of subsistence fisheries as a food supply, particularly in the tropics. In the first case, we show that larvae and juveniles of many commercially important species are linked to estuarin...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشکده علوم انسانی 1387

چکیده ندارد.

2000
Ching-Ta Chuang Yao-Hsien Lee

In the recent years, resource depletion of inshore and coastal fisheries has seriously impacted Taiwan. Local fishing communities’ economic profits in these fisheries have declined and resulted in lower earned incomes for the fishermen. These phenomena have lead many scholars, government agencies and fishing communities to evaluate the optimal number of operating vessels in these fisheries. Thi...

2009
Francis Laloë

Fisheries models are generally built to assess the dynamics of a resource with a given fishing mortality which level can be decided by some “decision maker” and/or which can be an observed process, e.g. times series proportional to some observed values of fishing effort. In these cases, the resource dynamics is represented “conditionally to” fishing mortality. This mortality must be therefore p...

Journal: :Canadian Journal of Fisheries and Aquatic Sciences 2022

Recreational and semi-subsistence fisheries are challenging to monitor but can act as precursors of developments in commercial fisheries, contributing information data-limited situations. We compared trends landings Norway lobster (Nephrops norvegicus) with data collected through a citizen science project by recreational fishers during period that coincided the onset trap fishery. The results s...

2003
Tim Coelli Euan Fleming

Smallholder farming systems in Papua New Guinea are characterised by an integrated set of cash cropping and subsistence food cropping activities. In the Highlands provinces, the subsistence food crop sub-system is dominated by sweet potato production. Coffee dominates the cash cropping sub-system, but a limited number of food crops are also grown for cash sale. The dynamics between sub-systems ...

2005
Kairat Mynbaev

5.1.1 Definitions The basic income indicators in Kazakhstan are the subsistence level and the poverty line. The subsistence level is the value of goods and services at prevailing prices necessary to meet the basic requirements for survival. It is proportional to the value of goods and services included in the consumer basket. The consumer basket consists of a food basket, while 30 percent is ad...

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