Population studies of Cavelerius saccharivorus Okajima (Heteroptera: Lygaeidae): A few findings on population interchange

Publisher Website
Google Scholar
Abstract
Summary: The change in population density of Cavelerius saccharivorus was studied in the sugar cane field and the Miscanthus habitats around it. This species spent 2 (or partly 3) generations a year. It was suggested that the density rose in the sugar cane field where the density had been low enough, when the population density increased in the nearby sugar cane fields. Likely, the density in the Miscanthus habitat increased with the density in the nearby sugar cane field. It seems that these are mainly due to flying movement of adults, and that the movement takes place in every season.It was found through the investigation in the sugar cane field that the percentage of long‐winged adults increased with the population density. These adults seemed to emmigrate to the nearby sugar cane fields and Miscanthus habitats. The remarkable increase in the percentage of long‐winged adults in the sugar cane field was probably due to the immigration into there. In the Miscanthus habitat the adult population was consisted mainly of long‐winged ones. Through all the observations, it was suggested that the adult movement was associated with the population regulation and performed chiefly by long‐winged adults.

This publication has 1 reference indexed in Scilit: