منابع مشابه
Exploitation dynamics of fish stocks
I address the question of the fluctuations in fishery landings. Using the fishery statistics time-series collected by the Food and Agriculture Organization of the United Nations since the early 1950s, I here analyze fishing activities and find two scaling features of capture fisheries production: (i) the standard deviation of growth rate of the domestically landed catches decays as a power-law ...
متن کاملSustainable exploitation of temperate fish stocks.
The theory of maximum sustainable yield (MSY) underpins many fishery management regimes and is applied principally as a single species concept. Using a simple dynamic biomass production model we show that MSY can be identified from a long time series of multi-stock data at a regional scale in the presence of species interactions and environmental change. It suggests that MSY is robust and calcu...
متن کاملDynamics and management of stage-structured fish stocks.
With increasing fishing pressures having brought several stocks to the brink of collapse, there is a need for developing efficient harvesting methods that account for factors beyond merely yield or profit. We consider the dynamics and management of a stage-structured fish stock. Our work is based on a consumer-resource model which De Roos et al. (in Theor. Popul. Biol. 73, 47-62, 2008) have der...
متن کاملNonlinear response of Black Sea pelagic fish stocks to over-exploitation
A 3-trophic level prey-predator model investigated the underlying nonlinear dynamics governing long-term (1960 to 1999) changes in pelagic fish stocks in the Black Sea. The model first explored the steady state dynamics under various combinations of consumption, harvesting and mortality rate values, and identified the critical parameters and their ranges that control equilibrium characteristics...
متن کاملEXPLOITATiON OF FISH POPULATIONS
The tcrm "exploitation" implies the idea of making use of the population, and in fisheries is generally regarded as a process which should be continued indefinitely without destroying the population. Very intense exploitation leading to the complete destruction of the population, or at least its reduction to a level so low that further exploitation is not worthwhile, is rarely, if ever, deliber...
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ژورنال
عنوان ژورنال: Ecological Informatics
سال: 2006
ISSN: 1574-9541
DOI: 10.1016/j.ecoinf.2005.10.002