کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
2076497 1079449 2009 12 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effect of disease-selective predation on prey infected by contact and external sources
موضوعات مرتبط
مهندسی و علوم پایه ریاضیات مدل‌سازی و شبیه سازی
پیش نمایش صفحه اول مقاله
Effect of disease-selective predation on prey infected by contact and external sources
چکیده انگلیسی
We propose and analyze a simple mathematical model for susceptible prey (S)-infected prey (I)-predator (P) interaction, where the susceptible prey population (S) is infected directly from external sources as well as through contact with infected class (I) and the predator completely avoids consuming the infected prey. The model is analyzed to obtain different thresholds of the key parameters under which the system exhibits stability around the biologically feasible equilibria. Through numerical simulations we display the effects of external infection and the infection through contact on the system dynamics in the absence as well as in the presence of the predator. We compare the system dynamics when infection occurs only through contact, with that when it occurs through contact and external sources. Our analysis demonstrates that under a disease-selective predation, stability and oscillations of the system is determined by two key parameters: the external infection rate and the force of infection through contact. Due to the introduction of external infection, the predator and the prey population show limit-cycle oscillations over a range parametric values. We suggest that while predicting the dynamics of such an eco-epidemiological system, the modes of infection and the infection rates might be carefully investigated.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Biosystems - Volume 95, Issue 3, March 2009, Pages 188-199
نویسندگان
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