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Foraging patterns of the leaf-cutter ant Atta laevigata (Smith) (Myrmicinae: Attini) in an area of cerrado vegetation Neotropical Entomology
Viana,Leonardo R.; Santos,Jean C.; Arruda,Leandro J.; Santos,Glenio P.; Fernandes,G. Wilson.
Foraging rate can directly affect the impact that Atta laevigata (Smith) has on the environment. We attempted to assess the factors which most affect foraging rate of A. laevigata using data collected over a three month period in the Parque Nacional da Serra do Cipó in Minas Gerais, Brazil. A bimodal foraging pattern was observed on clear sunny days, based on collected dry weights of vegetative material being carried towards nest entrances. Sampled entrances on clear sunny days yielded a daily average dry weight twice as high (0.9713 ± 0.1358 g) as on rainy days (0.4485 ± 0.1120 g). Larger nests (0.9713 ± 0.1358 g) yielded higher dry weights than smaller nests (0.2752 ± 0.0463 g). Field observations showed Ants switched to nest entrances with more suitable...
Tipo: Info:eu-repo/semantics/report Palavras-chave: Foraging constraints; Herbivory; Hotspot; Microhabitat specialization; Serra do Cipó.
Ano: 2004 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2004000300019
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Ovipositing behaviour of Compsobracon mirabilis (Szépligeti) (Hymenoptera, Braconidae) in a cerrado habitat, southeastern Brazil Rev. Bras. entomol.
Santos,Jean C.; Viana,Leonardo R.; Silveira,Fernando A. O.; Penteado-Dias,Angélica M.; Fernandes,G. Wilson.
The oviposition behaviour of the braconid parasitoid, Compsobracon mirabilis ( Szépligeti, 1901) is described. Observations were conducted in a cerrado region located in Três Marias, Minas Gerais, Brazil. The oviposition occurred in a branch of Alibertia concolor (Cham.) K. Schum. 1889 (Rubiaceae), inside of which there were thirteen larvae of an unidentified species of Lepidoptera.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Alibertia concolor; Braconidae; Hymenoptera; Oviposition behaviour; Parasitism.
Ano: 2004 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262004000100024
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