Predicting the sea lamprey population dynamic and ecosystem stability based on sex ratio corrected logistic model
DOI:
https://doi.org/10.54097/0sgy9317Keywords:
Sea lampreys, sex ratio, logistic model, population dynamic, ecosystem stability.Abstract
The sex ratio of the sea lamprey(Petromyzon marinus) is influenced by population density. A sex ratio corrected population model and a ecosystem stability model were established based on the logistic population model. In these models, the population growth rate (r) is corrected by sex ratio, and the deviation degree from environment carrying capacity (K) at different sex ratio scenarios is quantified. Using the models, the population dynamic and its effect on the ecosystem stability are simulated. The male dominant lamprey populations exhibit decreasing trends. The stability of the ecosystem decreases with the increase of male ratio.
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