Linear stability and positivity results for a generalized size-structured Daphnia model with inflow∗

نویسندگان

  • Jozsef Z. Farkas
  • Thomas Hagen
چکیده

We employ semigroup and spectral methods to analyze the linear stability of positive stationary solutions of a generalized size-structured Daphnia model. Using the regularity properties of the governing semigroup, we are able to formulate a general stability condition which permits an intuitively clear interpretation in a special case of model ingredients. Moreover, we derive a comprehensive instability criterion that reduces to an elegant instability condition for the classical Daphnia population model in terms of the inherent net reproduction rate of Daphnia individuals.

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تاریخ انتشار 2009