Results 11 to 20 of about 2,642 (206)

A biomechanical model for the relation between bite force and mandibular opening angle in arthropods [PDF]

Royal Society Open Science, 2023
Bite forces play a key role in animal ecology: they affect mating behaviour, fighting success, and the ability to feed. Although feeding habits of arthropods have a significant ecological and economical impact, we lack fundamental knowledge on how the ...
Frederik Püffel, Richard Johnston, David Labonte   +2 more
doaj   +2 more sources

Actinomicetos con actividad anti-Candida aisladas de hormigas cortadoras de hojas Atta cephalotes (Formicidae: Myrmicinae: Attini)

Revista Peruana de Medicina Experimental y Salud Pública, 2018
Objetivos. Aislar, seleccionar e identificar actinomicetos asociados a hormigas cortadoras de hojas Atta cephalotes (Linnaeus, 1758), que presenten mayor actividad anti-Candida. Materiales y métodos. Estudio transversal realizado en hormigas recolectadas
Cindy Abigail Gutierrez-Espinoza, Jorge León-Quispe   +1 more
doaj   +3 more sources

Vertical Stratification Increases the Capacity of Morphological Traits to Predict Trophic Position in Neotropical Ants. [PDF]

Ecol Evol
We use data from 73 Neotropical ant species to examine the strength of associations between nine morphological traits and trophic position. No individual morphological trait explained variation in the trophic position of arboreal species, whereas three traits individually correlated with the trophic position of ground species, but only weakly so ...
Vieira J, Neves KC, Zuanon LA, Gibb H, Andersen AN, Vasconcelos HL.   +5 more
europepmc   +2 more sources

Leafcutter ants enhance microbial drought resilience in tropical forest soil. [PDF]

Environ Microbiol Rep
We carried out an eight‐month investigation on a tropical soil microbial community in the aftermath of a severe drought event, which resulted in changes to soil moisture levels and methane emissions. Our study reveals that the leafcutter ant, Atta cephalotes, plays a crucial role in stabilizing the microbial community and enhancing its resilience by ...
Shulman HB, Aronson EL, Dierick D, Pinto-Tomás AA, Botthoff JK, Artavia-León A, Allen MF.   +6 more
europepmc   +2 more sources

Hygienic behavior and antimicrobial peptide expression of the leaf-cutting ant Atta cephalotes (Hymenoptera, Formicidae) to Metharhizium anisopliae [PDF]

Journal of Hymenoptera Research, 2022
Leaf-cutting ants depend on mutualisticfungi to survive. An infection that massively affects the workers compromising the proper maintenance of the fungus, or that can attack the fungus garden, can be fatal to the colony.
Juan Sebastián Gómez-Díaz, Andrea Niño-Castro, Sandra Milena Valencia-Giraldo, Karent Mariana Cotazo-Calambas   +3 more
doaj   +3 more sources

Ant Diversity and Stratification in an Amazonian Rainforest. [PDF]

Ecol Evol
We examined the three strata of an Amazonian rainforest (e.g., the ground and leaf litter, understory and canopy) using only two sampling techniques and analyzed their functional traits. We identified 494 ant species from 10 subfamilies and 77 genera over ≈3.0 ha, showing that they are species rich and abundant, particularly at ground level.
Delabie JHC, Dejean A, Leponce M, Longino JT, Orivel J, Touchard A, Compin A.   +6 more
europepmc   +2 more sources

Hymenopteran-specific TRPA channel from the Texas leaf cutter ant (Atta texana) is heat and cold activated and expression correlates with environmental temperature. [PDF]

Insect Sci
Texas leaf cutter ant (Atta texana) populations have expanded northward and their obligate symbiotic fungus has increased cold tolerance. The ants have exquisitely temperature sensitive antennae; here, we find the antennae express a subset of six transient receptor potential (TRP) channels, including HsTRPA.
York JM, Taylor TN, LaPotin S, Lu Y, Mueller U.   +4 more
europepmc   +2 more sources

Occurrence of Leaf-Cutting and Grass-Cutting Ants of the Genus Atta (Hymenoptera: Formicidae) in Geographic Regions of Brazil

Sociobiology, 2020
Leaf-cutting ants are widely distributed in Brazil, particularly species of the genus Atta. We therefore described the occurrence of leaf-cutting and grass-cutting ant species of the genus Atta.
Luiz Carlos Forti, Jael Santos Rando, Roberto da Silva Camargo, Aldenise Alves Moreira, Maria Aparecida Castellani, Suzany Aguiar Leite, Kátia Kaelly Andrade Sousa, Nadia Caldato   +7 more
doaj   +1 more source

EFICIÊNCIA DA ISCA MIREX-S (SULFURAMIDA 0,3%) NO CONTROLE DE Atta cephalotes(HYMENOPTERA: FORMICIDAE) EM TRÊS DOSAGENS [PDF]

Acta Amazonica, 1996
Este trabalho foi realizado em reflorestamentos de eucalipto híbrido urograndis (Eucalyptus urophyllaX Eucalyptus grandis)da Jari Celulose S.A, no município de Almerim, Pará, de julho de 1993 a janeiro de 1994.
José Cola ZANUNCIO, Adalton Pinheiro da CRUZ, Darcy Francisco dos SANTOS, Marco Antonio de OLIVEIRA   +3 more
doaj   +1 more source

Epizootia natural causada por Cordyceps unilateralis (Hypocreales, Euascomycetes) em adultos de Camponutus sp. (Hymenoptera, Formicidae) na região de Manaus, Amazonas, Brasil () [PDF]

Acta Amazonica, 1980
Resumo O presente trabalho registra uma epizootia ocorrida na região amazônica em adultos de Camponotus sp causada por Cordyceps unilateralis (Tuslane) Saccardo. O desenvolvimento do fungo no hospedeiro foi descrito. Os mecanismos envolvidos no contágio,
Carlos Fernando Salgueirosa de Andrade
doaj   +1 more source