Spatial Distribution and Architecture of Acromyrmex landolti Forel (Hymenoptera, Formicidae) Nests in Pastures of Southwestern Bahia, Brazil

Sociobiology

Aldenise Alves Moreira¹  Maria Aparecida Castellani¹  Sébastien Lacau¹  Luiz Carlos Forti²  Michele Silva D'Esquivel¹  Milton Rodrigues da Silva Júnior¹ 

[1] Universidade Estadual do Sudoeste da Bahia;Universidade Estadual Paulista

关键词: negative binomial;    chambers;    channels;    depth;   

DOI  :  

来源: Universidade Estadual de Feira de Santana, Brazil

【 摘 要 】

Ants of the generaAttaandAcromyrmex(Myrmicinae: Attini) are in general pests for agricultural and pasture areas. In southwestern Bahia pastures, in Brazil,Acromyrmex landoltiForel occurs at intermediate densities of 260 nests ha -1 . In spite of its economic importance, there is not enough research on the bioecological aspects of such species. This paper aims to study the spatial distribution and the architectural pattern ofA. landoltinests, as well as to establish the foundations for the improvement of strategies for controlling the pest. The research was carried out during the period of June 2011 and May 2012, in an area of pastures measuring 2.7 ha, in Itapetinga, in Bahia. Twenty five nests were selected. The external mound area, height of the tower, distance between the tower and the external mound area, as well as the tower diameter were all registered. In order to describe the internal architecture, the same nests were completely excavated and five were molded in cement. The spatial distribution of the nests is of aggregated type. The towers height is 2.1 cm and the average diameter is 1.2 cm. The amount of loose soil is of about 8.0 cm from the tower, with an average area of 472.9±312.5 cm² and average volume of 1.4 L±0.9. The depth of the nests varies between 7.0 and 78.0 cm, with an average of 33.2±21.29 cm. The nests have, in average, 4.4±2.0 chambers, being two nests with just one chamber (8%) and another nest (4%) with 11 chambers.

【 授权许可】

Unknown