Seasonal changes in the population density of Coranus Africana El-Sebaey in Egypt as indicated by life table parametersl [electronic resource].

Includes references.

Monitoring the changes in the population density of the adult predatory bug, Coranus africana El-Sebaey (Hemiptera-Reduviidae) was carried out from February 1999 till January 2001 in Kom Oshim distrtct which situated in the Western Desert Ago-ecosystem (Egypt). The highest number of adults was achieved between July and October, while the lowest revel of the population was reported between February and March during the two tested successive years. The effect of the prevailing physical environmental factors on the population density and life table parameters was also studied by raising an artificial population of the predator in field cages. This reduviid completed six overlapping generations in a year. The basic life table parameters, expressed as the net reproductive rate (R0 ), gross reproductive rate (GAR), instantaneous rate of natural increase (rm) and the mean generation time (T) were determined with respect to the date of hatching. The average values of these parameters under natural climatic conditions were 81.16, 902.01, 0.3798 and 12.24, for A0 , GAR, rm and T, respectively.

Summary in Arabic.

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