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Made available in DSpace on 2022-04-28T21:37:12Z (GMT). No. of bitstreams: 0 Previous issue date: 2010-12-01 The objectives of this study were to develop knowledge about the diversity of leaf-cutting ants of the genus Acromyrmex in Southwestern Bahia, Brazil, relate their occurrence to the predominant vegetation and estimate their population size. The survey was undertaken in 36 municipalities, with demarcation and georeferencing of collection points and observation of the predominant vegetation. Collections were performed along the road sides, in a 1,600 km long area. Sample collection points were established at every 50 km, and ants were collected within a distance of 50 m from each side of the road. Collected material was fixed in 70% ethanol for later identification at the species level at the Laboratory of Social-Pest Insects of the São Paulo State University (UNESP), Botucatu campus, São Paulo. Excavations were conducted in 12 active nests of Acromyrmex balzani with, the aim of collecting colonies for estimates of population size. The following species were found: Acromyrmex landolti, A. balzani, A. rugosus rugosus, and A. lobicornis. The most frequent species were A. landolti and A. balzani. There were no great vegetation differences in the sampled areas, which made it difficult to identify the best bioecological interactions. In the excavated nests of A. balzani, the number of workers ranged from 102 to 700 individuals. Entomology Laboratory Department of Phytotechnics Zootechnicsofthe Southwest Bahia State University (DFZ/UESB) Estrada do Bem Querer, Km 04, Caixa Postal 95, 45083-900, Vitória da Conquista, BA Department of Vegetable Production - Phytosanitary Defense FCA/ UNESP Fazenda Experimental Lageado, Caixa Postal 237, 18603-970, Botucatu, SP Department of Vegetable Production - Phytosanitary Defense FCA/ UNESP

Six Atta bisphaerica, Forel, 1908 (Hymenoptera, Formicidae) nests were excavated with the aim of studying the relationship between area and volume of the mound, the total volume and total number of chambers in the nest. Prior to excavation, the area and the volume of refused soil in the nests were measured. During excavation, all data referring to chambers were recorded, such as: length, depth and width. The nests named A1, A2, A3, A4, A5 and A6 presented 31.16; 40.87, 67.08, 35.04, 73.48 and 18,73m2 of mound area, respectively. The mound area did not correlate either with the volume or with the total number of chambers. The mound volume correlated significantly with the mound area, total number and total volume of chambers. The total volume of chambers was correlated with the total number of chambers. Foram escavados seis ninhos adultos de Atta bisphaerica Forel, 1908, (Hymenoptera, Formicidae) com o objetivo de estudar a relação entre área e volume do monte de terra solta, volume total e número total de câmaras do ninho. Antes de se iniciar o processo de escavação, mediram-se a área e o volume de terra solta dos ninhos. Durante a escavação, foram anotados todos os dados referentes à altura, largura e profundidade das câmaras. Os ninhos, denominados A1, A2, A3, A4, A5 e A6, apresentaram áreas de terra solta de 31,16; 40,87; 67,08, 35,04; 73,48 e 18,73m2, respectivamente. A área de terra solta não apresentou correlação significativa com volume e número total de câmaras. O volume de terra solta apresentou correlação significativa com a área de terra solta e com o número e volume total de câmaras. O volume total de câmaras apresentou correlação significativa com o número total de câmaras.

Young nests of Acromyrmex subterraneus brunneus are characterized by refuse soil in the exterior of the nest, a single fungus chamber 11 to 20 cm deep in relation to soil surface and internal volume ranging from 0.3 to 1.5 liters. These nidification patterns are important characteristics for identifying and understanding the interactions between species and their habitats. Ninhos jovens de Acromyrmex subterraneus brunneus caracterizam-se pela terra solta no exterior do ninho, por ter uma única câmara de fungo com profundidade de 11 a 20 cm em relação à superfície do solo e por ter volume interno variando de 0,3 a 1,5 litros. Estes padrões de nidificação são caracteres importantes para a identificação e o conhecimento das interações da espécie com o seu habitat.

Made available in DSpace on 2022-04-29T07:14:45Z (GMT). No. of bitstreams: 0 Previous issue date: 2003-07-01 Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) Using of toxic baits made of dehydrated citric pulp to control grass-cutting ants can lead to unsatisfactory results because of the low attractiveness of the substrate to worker ants. This work aimed to identify attractive substances, with potential for incorporation in a matrix of granulated baits for grass-cutting ants, among several kinds of sugars and substances used in artificial sweeteners. Experiments were carried out in mature nests of Atta capiguara (Hym.: Formicidae) set in pasture. Studied substances were sucrose, fructose, soluble starch, raffinose, maltose, lactose, sorbose, cellobiose, arabinose, xylose, glucose, galactose, rhamnose, arabinose, melezitose, saccharine and cyclamate (at 5.0% w/v). Later, on maltose, xylose, sucrose, fructose and glucose solutions were included at 5.0%, 7.5%, 10.0% and 20.0% w/v, respectively. Cellulose rectangles were used as vehicle and number of rectangles carried into the colonies was evaluated. Carrying rates were very low with maximum means of 9.6% for lactose and 6.0% for arabinose and cyclamate, at the 5.0% concentration. No differences (P > 0.05) were observed relatively to the control (distilled water). No effects were detected for solution, concentration and for the interaction of these factors. Sugars and artificial sweeteners studied were not attractive to Atta capiguara workers, turning their inclusion as attractants in toxic ant baits not viable. UESB Depto. de Fitotecnia e Zootecnia UNESP/FCA Depto. de Produção Vegetal UNESP/FCA Depto. de Produção Vegetal FAPESP: 1996/ 8128-9

Submitted by Vitor Silverio Rodrigues (vitorsrodrigues@reitoria.unesp.br) on 2014-05-27T11:20:33Z No. of bitstreams: 0Bitstream added on 2014-05-27T14:34:16Z : No. of bitstreams: 1 2-s2.0-0036939068.pdf: 118588 bytes, checksum: 3f32942b58c839dde0e581e6e46b4041 (MD5) Made available in DSpace on 2014-05-27T11:20:33Z (GMT). No. of bitstreams: 0 Previous issue date: 2002-12-01 Six Atta bisphaerica, Forel, 1908 (Hymenoptera, Formicidae) nests were excavated with the aim of studying the relationship between area and volume of the mound, the total volume and total number of chambers in the nest. Prior to excavation, the area and the volume of refused soil in the nests were measured. During excavation, all data referring to chambers were recorded, such as: length, depth and width. The nests named A1, A2, A3, A4, A5 and A6 presented 31.16; 40.87, 67.08, 35.04, 73.48 and 18,73m 2 of mound area, respectively. The mound area did not correlate either with the volume or with the total number of chambers. The mound volume correlated significantly with the mound area, total number and total volume of chambers. The total volume of chambers was correlated with the total number of chambers. Departamento de Producao Vegetal FCA Universidade Estadual Paulista, C.P. 237, 18603-970 Botucatu, Sao Paulo Departamento de Zoologia IB/Unesp, Botucatu, Sao Paulo Depto. de Fitotecnia e Zootecnia Uesb, C.P. 95, Vitoria da Conquista, Bahia Departamento de Producao Vegetal FCA Universidade Estadual Paulista, C.P. 237, 18603-970 Botucatu, Sao Paulo Departamento de Zoologia IB/Unesp, Botucatu, Sao Paulo