Publication: Bifurcation analysis of an intraguild predation model with constant effort harvesting
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Date
2024-02
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Don Mariano Marcos Memorial State University - South La Union Campus
Abstract
This study considered a type of interaction between species where two or more
species that compete for shared resources also feed each other. This type of interaction is
called Intraguild Predation (IGP). A three-species IGP model which includes top and
intermediate predators, termed as Intraguild (TG) predator and Intraguild (IG) prey;
respectively, and a basal resource was examined. This study modified a three-species
intraguild predation model by Collera (2016) by incorporating a constant effort
harvesting in the basal resource. Conditions for the existence and local stability of all
non-negative equilibrium points were investigated. Depending on the value of the
harvesting rate, results showed five possible scenarios that will happen in the interaction.
That is, extinction of at least one species and coexistence of all interacting species.
Moreover, it was found out that as long as the IC prey is more efficient in consuming the
basal resource than the IG predator and the harvesting rate is at minimum, persistence of
all interacting species through time is possible.
In addition, sufficient conditions where stability switching of equilibrium points
through saddle-node bifurcations were provided. To verify the results, simulations were
performed using MATLAB. Lastly, real-life implications of the results such as the
conservation of species, predicting tool, sustainable development goals, and replicability
of the model were discussed.
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Citation
Barredo, R. E., Mercado, S. K. G., Tucdaan, R. L. D. (2024). Bifurcation analysis of an intraguild predation model with constant effort harvesting [Unpublished Undergraduate thesis]. Don Mariano Marcos Memorial State University - South La Union Campus, Agoo, La Union.