title: [Effect of procercoids of Triaenophorus nodulosus on the biology of their 1st imtermediate hosts Cyclops strenuus].
abstract: The effect of procercoids of T. nodulosus on the periods of metamorphosis, fecundity, survival and the capacity to infect C. strenuus at all copepodid stages (I-V) was studied experimentally. It has been first shown that early copepodid stages (I-III) can be easily infected and serve as first intermediate hosts of T. nodulosus. Under the effect of the parasite the metamorphosis periods of the I and 2-nd copepodid stages increase considerably even at the low infection intensity while at the IV and V copepodid stages--only at the high infection intensity. If the infection takes place at the IV copepodid stage the female fecundity decreases even at a high infection intensity. The life span of infected and noninfected cyclops coincides. At early developmental stages the relations in the system "T. nodulosus-C. strenuus" manifest themselves in different ways and result in the breach of the important biological function of the host.
mesh_terms: D000375:Aging; D000818:Animals; D003445:Crustacea / Q000469:parasitology* / Q000502:physiology; D004169:Diphyllobothriasis / Q000469:parasitology; D004170:Diphyllobothrium / Q000472:pathogenicity / Q000502:physiology; D005260:Female; D005298:Fertility; D007814:Larva; D008297:Male; D008675:Metamorphosis, Biological
vernacular_title: Vozdeĭstvie protserkoidov Triaenophorus nodulosus na biologiiu ikh pervykh promezhutochnykh khoziaev Cyclops strenuus