[The fertility of Simulium noelleri in the floodplain of the Northern Donets River].
Potential, actual and ecological fertility of S. noelleri females has been examined. Such information has been so far available only for the southeastern part of the Ukraine. It has been established that the first ovipositor was only from autogenically developed oocysts. The females of the second generation were born with follicules developed to phase I and their mean potential fertility was 293.00 +/- 5.97. Females of the third generation were born with follicules in phase IIB of development. Their fertility was above 337.14 +/- 4.08. During postmortem examination of female individuals with mature oocysts, disturbances in chorion development have been observed in some of them. They give birth to nonviable larvae, which decreases the number of the population. Ecological fertility declines as compared to the actual one both due to stuck (2%) and defective (10%) oocysts. Both indexes should be taken into consideration while calculating the quantity of the population (at the stage of first age larvae).
Savust'ianenko
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TL
D000818:Animals; D004463:Ecology; D005260:Female; D005298:Fertility / Q000502:physiology; D005618:Fresh Water; D008297:Male; D012843:Simuliidae / Q000502:physiology*; D014455:Ukraine
K plodovitosti Simulium noelleri poĭmy r. Severskiĭ Donets.