Morphological description of Amblyomma brasiliense Aragão, 1908 (Acari: Ixodidae) larvae and nymphs

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

GROWTH OF OOCYTE AND NURSE CHAMBER DURING OOGENESIS IN QUEENS OF THE LEAF-CUTTING ANT ATTA SEXDENS RUBROPILOSA FOREL, 1908 (HYM, FORMICIDAE)

Volume changes of the vitellarium components of the leaf-cutting ant Atta sexdens rubropilosa are reported. The oocyte grew to approximately 409 times of its initial volume and reached a maximum value of 1.2 x 10(7) mu m(3). The follicle increase in size at a more or less constant rate up to the 12(th), showing an elevated growth rate thereafter. The mean number of follicles per ovariole was 16.42 +/- 3.58.

Comparação entre parâmetros externos e internos de ninhos de Atta bisphaerica Forel, 1908 (Hymenoptera, Formicidae)

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.

Desenvolvimento inicial e distribuição temporal de larvas e juvenis de Bryconamericus stramineus Eigenmann, 1908 (Osteichthyes, Characidae) na planície alagável do alto rio Paraná, Brasil

The aim of this paper was to analyze initial development and temporal distribution of larvae and juveniles of Bryconamericus stramineus and their relationship with some environmental variables of Ressaco do Leopoldo in the Upper Paraná River floodplain. The samples were taken from February 1991 to February 1992. The larvae and the juveniles were identified and described according to the with its morphologic and meristic characteristics. The larvae presented scarce pigmentation, subterminal mouth, medium anal opening and myomeres varying 35-40 (16-21 pre and IT-22 postanal). The greater densities of larvae and juveniles were verified in December 1991 and November 1991, respectively, mainly during the night. The larvae density was only correlated with precipitation.

Atta bisphaerica, Forel, 1908 (Hymenoptera: Formicidae): arquitetura do ninho e distribuição de isca nas câmaras

Pós-graduação em Agronomia (Proteção de Plantas) - FCA

Preparação e incorporação do substrato em atta sexdens rubropilosa forel, 1908 (Hymenoptera: formicidae) e morfofuncionalidade mandibular em espécies de atta

Pós-graduação em Agronomia (Proteção de Plantas) - FCA