蚁丘被破坏程度对红火蚁蚁群迁移的影响

本文调查研究了蚁丘被破坏的程度对红火蚁Solenopsis invicta Buren蚁群迁移的影响。结果表明,蚁巢地表部分被破坏可导致红火蚁蚁群发生分巢、搬巢等现象,蚁群的移巢比率随着蚁丘被破坏程度的增大而增大。当蚁丘体积被破坏75%时分巢比率最高,为14.44%;被破坏100%时搬巢比率、移巢比率均最高,分别为16.27%、27.00%。红火蚁蚁丘被破坏程度(D)与蚁群迁移比率(M)之间关系模型为M=4.3443+25.474D-3.4857D2。蚁丘受到破坏后,蚁群迁移距离平均为4.3m,迁移方向是随机的。

Effect of destructing mounds on the colony migration of red imported fire ant Solenopsis invicta

The effect of destroying ant-mounds on the spread of the exotic red fire ant,Solenopsis invicta Buren was investigated.The results show that experimental destruction of mounds could cause colonies to migrate and bud,and that the rate of migration increased with the degree of mound destruction.14.44% of colonies formed sub-colonies when 75% of the volume of their mounds was destroyed.When whole mounds were destroyed 16.27% of colonies migrated and 27.00% formed sub-colonies.The equation,M = 4.3443 ＋ 25.474D 3.4857D2,describes the relationship between the degree of mound destruction（D） and the rate of colony migration（M）.The mean distance of colony movement following mound destruction was 4.3 m and the direction of movement was random.