Titlebook: Renewable Resource Management; Proceedings of a Wor Thomas L. Vincent,Janislaw M. Skowronski Conference proceedings 1981 Springer-Verlag Be

异常

Appraisal of the Commercial Potential of the New Zealand Deepwater Fishery,elatively small country has assumed management responsibility for a significant fishery. Results from scientific and commercial fishing activity though helping to clarify the probable abundance of fish, has done little to inform all concerned whether or not the EEZ declaration was a commercial bonan

Antagonism

Subinjurious Maintenance Strategies for Optimal Control of Nematodes,ptimal control of such pests requires that their numbers be kept below both crop-injury and competition thresholds, although eradication is impossible. We derive optimal long-term control strategies for this particularly simple case. The technique is applied to a model of the root-knot nematode . in

glowing

旅行路线

HAWK

Conference proceedings 1981ur own survival and euphoria, it is paramount that such resources remain as their name implies and not be driven to extinction through short term programs of over exploitation. Consideration of the harvesting of renewable resources leads to a simple question that was the theme of the workshop and is

使长胖

Age-Structure and Stability in Multiple-Age Spawning Populations, lifetime replacement value a both spreads reproduction over more age-classes (which is stabilizing) and introduces a delay into the system response (which is potentially destabilizing) by increasing the mean age of reproduction. In this paper, the interplay of these two effects is explored.

头盔

Modelling and Management of Fish Populations with High and Low Fecundities,ally well defined. In this case, it is possible to build a realistic model of the dynamics of the population, and the full power of stability theory and optimal control theory may be used to formulate optimal management policies.

MORPH

Optimal Management of Optimal Foragers,ynamics. Using this model it is shown that equilibrium yields under human exploitation and qualitative stability properties of predator-prey interactions depend critically upon the behavior of the natural animal predators.

细菌等

BUDGE

Vulnerability of a Prey-Predator Model Under Harvesting,ity can be used in the development of a practical method for setting a limit on the intensity of harvesting. Necessary conditions associated with controlling a system in the boundary of a reachable set are employed to determine the vulnerability of a system directly.