Host-parasite population dynamics under combined frequency- and density-dependent transmission
نویسندگان
چکیده
J. J. Ryder ([email protected]), School of Medicine, Health Policy & Practice, Univ. of East Anglia, Norwich, UK, NR4 7TJ. M. R. Miller and M. Boots, Dept of Animal & Plant Sciences, Univ. of Sheffield, Sheffield, UK, S10 2TN. R. J. Knell, School of Biological and Chemical Sciences, Queen Mary, Univ. of London, London, UK, E1 4NS. A. White, Dept of Mathematics and the Maxwell Inst. for Mathematical Sciences, Heriot-Watt Univ., Edinburgh, Scotland, EH14 4AS.
منابع مشابه
Interactions between frequency-dependent and vertical transmission in host-parasite systems.
We investigate host-pathogen dynamics and conditions for coexistence in two models incorporating frequency-dependent horizontal transmission in conjunction with vertical transmission. The first model combines frequency-dependent and uniparental vertical transmission, while the second addresses parasites transmitted vertically via both parents. For the first model, we ask how the addition of ver...
متن کاملDensity dependence and overdispersion in the transmission of helminth parasites.
The influence of density-dependent processes on the transmission of parasitic helminths is determined by both the severity of the regulatory constraints and the degree of parasite overdispersion among the host population. We investigate how overdispersed parasite distributions among humans influence transmission levels in both directly- and indirectly-transmitted nematodes (Ascaris lumbricoides...
متن کاملHerbicides in the environment alter infection dynamics in a microbial host-parasite system.
Parasites play an important role in the regulation of host population growth. How these ubiquitous stressors interact with anthropogenic stressors is less often studied. In a full factorial experiment we explored the independent and combined effects of the widely used herbicide diuron and a chytrid parasite on the fitness of genetically different monoclonal diatom populations. Furthermore, we e...
متن کاملCompetitive co-existence of vertically and horizontally transmitted parasites
Questions: Can vertically transmitted parasites (VTPs) serve as indirect mutualists by excluding more virulent, horizontally transmitted parasites (HTPs)? How does the efficiency of vertical transmission affect: (1) the equilibrium number of hosts infected by each type of parasite; (2) the total number of hosts in the population; and (3) virulence of the horizontally transmitted parasite? How d...
متن کاملCondition-dependent expression of virulence in a trypanosome infecting bumblebees
Parasite virulence affects both the temporal dynamics of host-parasite relationships and the degree to which parasites regulate host populations. If hosts can compensate for parasitism, then parasites may exhibit condition-dependent virulence, with high virulence being seen only when the host is under conditions of stress. Despite their usually low level of virulence, theory suggests that such ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2007