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The impact of constant effort harvesting on the dynamics of a discrete‐time contest competition model
Authors:Ziyad AlSharawi  Amal Amleh
Affiliation:1. Department of Mathematics and Statistics, American University of Sharjah, Sharjah, United Arab Emirates;2. Sciences and Engineering, Paris–Sorbonne University Abu Dhabi, Abu Dhabi, United Arab Emirates
Abstract:In this paper, we study a general discrete‐time model representing the dynamics of a contest competition species with constant effort exploitation. In particular, we consider the difference equation x n +1=x n f (x n ?k )?h x n where h >0, k ∈{0,1}, and the density dependent function f satisfies certain conditions that are typical of a contest competition. The harvesting parameter h is considered as the main parameter, and its effect on the general dynamics of the model is investigated. In the absence of delay in the recruitment (k =0), we show the effect of h on the stability, the maximum sustainable yield, the persistence of solutions, and how the intraspecific competition change from contest to scramble competition. When the delay in recruitment is 1 (k =1), we show that a Neimark‐Sacker bifurcation occurs, and the obtained invariant curve is supercritical. Furthermore, we give a characterization of the persistent set.
Keywords:contest competition  Neimark‐Sacker bifurcation  persistence  scramble competition
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