The annual population cycles of O. nigripes and the unique peak of A. cursor population during five years highlight attention to their importance as wild reservoirs of the hantavirus disease.
Toxin-determined foraging also may play a role in population cycles of herbivores [ 55].
Population cycles of two species of forest caterpillars, winter moth Operophtera brumata and the autumnal moth Epirrita autumnata have been studied extensively over both spatial and temporal scales in Norway, Sweden and Finland by a number of workers.
The number of HFRS cases increased during the 18 twelve-month study periods but with considerable interannual variation coupled with the 3- to 4-year population cycles of the bank vole.
Although data at a local scale indicate several trophic levels of interactions for rabbits, a large-scale regional study in northern England indicated that the population cycles of the red grouse are affected by a single trophic interaction with a parasitic nematode (Hudson et al. 1998).
To investigate the association between VOCs measured in residential indoor air and lung function in the Canadian population Cycle 2 of the Canadian Health Measures Survey – a population based cross-sectional survey designed to be representative of the Canadian population – was carried out between 2009 and 2011.
There is no mention of cycle phases other than the crash phase (O. brumata), nor mention of successive population cycles or of outbreak waves (cf. Tenow 1972 ; Tenow et al. 2007 ) only of "more complex spatial patterns".
The chance of infection was greatest during the peak of the population cycle, implying that the likelihood of exposure to hantavirus increases with increasing population density.
The chance of being PUUV seropositive is related to phase of population cycle and is therefore density dependent.
