Abstract The existence of Mangrove Forest is very necessary for the cycle of the food chain
of marine fauna and its ecosystem. Balikpapan City has several Mangrove forest
conservation areas that contain some rare–protected species. In this paper, a mathematical
model is formulated to examine the problem of decreasing Mangrove forest resources due to
the population of Bekantan (Nasalis larvatus), and the land clearing for fish ponds in the
area of Mangrove forest conservation areas. The cumulative density of Mangrove forest …