A study of the interaction between the sex ratio of the sevengill eel population and the ecosystem based on the Volterra model

Lampreys play an important role in the ecological environment, although they may have some negative effects in some aspects, but overall, their existence is important in maintaining ecological balance and promoting biodiversity. This study first constructed the ecosystem and food web is constructed. Secondly, an improved Volterra predation model is established to adapt to multi-level predation relationships. Finally, through data fitting, a function model of the sex ratio of lampreys changing with the amount of food was constructed, and three sex ratios were divided (similar to males, more females than males, fewer females than males) to analyze the impact on the larger ecosystem when the population of lampreys could change its sex ratio.