Impacts of predator–prey interaction on managing maximum sustainable yield and resilience

• Main Authors: Kanisha Pujaru, Tapan Kumar Kar
• Format: Article
• Language: English
• Published: Vilnius University Press 2020-05-01
• Series: Nonlinear Analysis
• Subjects: predator–prey; ecosystem services; maximum sustainable yield; ecological resilience; bifurcation
• Online Access: https://www.journals.vu.lt/nonlinear-analysis/article/view/16657

This paper gives a broad outline of some comparative analysis of two ecological services, namely, yield and resilience of a generalist predator–prey system. Although either prey or predator species can be harvested at maximum sustainable yield (MSY) level, yet there is a trade-off between yield and resilience. When both the species are harvested simultaneously, MSY increase by changing catchabilities always increases the system resilience both in prey- and predator-oriented fishery. In particular, a prey-oriented fishery with low prey catchability gives more yield and resilience but in case of predator-oriented fishery with high predator catchability, gives more of these ecological services. Thus to get both the optimum yield and resilience, a balanced harvesting approach is needed between the prey and predator trophic levels. Throughout the analysis, we use both the analytical as well as numerical techniques.