3 papers
math.DS2006
Harvesting Fisheries Management Strategies With Modified Effort Function
Lev Idels, Mei Wang
In traditional harvesting model a fishing effort E is defined by the fishing intensity and does not address the inverse effect of fish abundance on the fishing effort. In this pape…
math.DS2006
Stability of a Time-varying Fishing Model with Delay
L. Berezansky, L. Idels
We introduce a delay nonlinear differential equation model which describes how fish are harvested. In our previous studies we investigated the persistence of that equation and exis…
math.DS2006
Population Models With Delay in Dynamic Environment
L. Berezansky, L. Idels
We study the combined effects of periodically varying carrying capacity and survival rates on the fish population in the ocean (sea). We introduce the Getz type delay differential…