[Local population of helminths].
A local population of any species of helminths is considered to be an assemblage of its individuals pressentas i the organisms of all categories of hosts from corresponding demes so in the environment within the limits of the latter. Its borders coinside with the limits of the activity zone of the definitive host (hosts) which contains a spreading phase of helminths, mature individuals, and is represented by a local population. The borders of the population area are affected by daily and seasonal fluctuations but at the same time rather constant within a long time. The number of the population in different parts of its area can be dissimilar. It is also characterized by many-year fluctuations (pulsation in the number) having a specific character for each species. It is supposed that control of helminths of a given population will be effective mainly in the period of natural recession and depression of its number. Birds-migrants do not cause great changes in the population number though the birds can play a significant part in the formation of new populations in new biotopes.
D000818:Animals; D004463:Ecology; D005843:Geography; D006376:Helminths; D011153:Population; D014586:USSR
O lokal'noĭ populiatsii gel'mintov