Issue:ISSN 2095-1353
CN 11-6020/Q
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2012年49 No.6
Population dynamics of Oedaleus asiaticus ondesert grasslands in Inner Mongolia
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Key Words： Oedaleus asiaticus，population dynamics，spatial pattern，desert grasslands，Inner Mongolia
Abstract： The population dynamics of Oedaleus asiaticus ( B． -Bienko) was investigated on the Gegentala grasslands of Siziwangqi county，Wulanchabu city，Inner Mongolia from 2010 to 2011. The spatial distribution of the grasshoppers was random． Nymphs began to occur in mid-June． The first to third instars peaked in density from mid to late June to early July and were gone by late July． The fourth to fifth instars began to appear in late June and peaked in early-mid July before disappearing at the end of July． The adults began to appear in early July，peaked in mid-July to late August，and disappeared in early September． The population dynamics of O． asiaticus was divided into three periods using the optimal
dividing method: ( 1 ) Nymphs began to emerge in mid-June，population density is low and individuals are randomly dispersed or aggregated． (2) The nymphs occur mostly during late June and early-middle July and are either randomly dispersed at low density or aggregated at high density． (3) Adults occur from mid to late July to early September and are randomly distributed．