Simulating predator-prey dynamics between clown knifefish (Chitala ornata) and ayungin (Leiopotherapan plumbeus) using agent-based modeling

Date

2025

Adviser

John Cedric C. Gaza

Principal

Mabel S. Buela

Abstract

Among the multiple threats to biodiversity in the Philippines, the introduction of non-native species continues to threaten the population of local, economically important fish. The clown knifefish (C. ornata), believed to have been brought into the Philippines for ornamental purposes, has established itself as a dominating predator in the Laguna de Bay, contributing to the decline of several native species, including L. plumbeus, an economically important species in the area. In this study, we aim to simulate the predator-prey dynamics between the invasive C. ornata and the endemic L. plumbeus in a simulated freshwater environment using agent-based modeling achieved through Netlogo. By integrating biological variables, including sex, age, energy, and reproductive seasons, along with environmental factors such as temperature and turbidity, this research aims to identify the key factors influencing the interaction between the two species and predict potential population dynamics and trends. The environment includes food for the native species. The invasive species preys on the native species but is also able to eat the same food as the native species under specific conditions. The specifics of their behavior, such as reproduction, movement, and lifespan, are based on previous studies. The results indicate that ambient water temperature, turbidity, mating season, initial population sizes, and the timing for the introduction of C. ornata. play an important role in the predator-prey dynamics of L. plumbeus and C. ornata. The model can potentially be used to simulate real-world scenarios to aid in conservation efforts, particularly in freshwater bodies like the Laguna de Bay, mapping population trends of freshwater invasive species and assessing the risks they pose to native population.

Language

English

Location

UP Rural High School

Notes

To access this capstone, please contact the UP Rural High School Library at uprhslibrary.uplb@up.edu.ph. You may also visit the library in person, provided you secure prior confirmation from the librarian. We will be happy to assist you.

Document Type

Capstone

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