Results 41 to 50 of about 31,233 (264)

Managing leaf‐cutting ants: peculiarities, trends and challenges [PDF]

open access: yesPest Management Science, 2013
Abstract Leaf‐cutting ants are generally recognized as important pest species in Neotropical America. They are eusocial insects that exhibit social organization, foraging, fungus‐cultivation, hygiene and a complex nest structure, which render their management notoriously difficult.
Terezinha M C, Della Lucia   +2 more
openaire   +2 more sources

Leaf-cutting ant attack in initial pine plantations and growth of defoliated plants

open access: yesPesquisa Agropecuária Brasileira, 2012
The objective of this work was to evaluate the natural attack by Acromyrmex crassispinus in initial Pinus taeda plantations without control measures against ants, as well as the effect of defoliation in seedlings of P. taeda. Evaluations of the attack of
Mariane Aparecida Nickele   +5 more
doaj   +1 more source

Comparative Dating Of Attine Ant And Lepiotaceous Cultivar Phylogenies Reveals Coevolutionary Synchrony And Discord [PDF]

open access: yes, 2010
The mutualistic symbiosis between fungus-gardening ants and their cultivars has made fundamental contributions to our understanding of the coevolution of complex species interactions.
Abbot, Patrick   +2 more
core   +1 more source

Influências de Atta spp. (Hymenoptera: Formicidae) na recuperação da vegetação pós-fogo em floresta de transição amazônica Influences of leafcutter ant Atta spp. (Hymenoptera: Formicidae) on vegetation recovery after fire in Amazonian transitional forest

open access: yesActa Amazonica, 2012
Este estudo investigou o papel das saúvas na recuperação da vegetação pós-fogo. Foi hipotetizado que a perturbação do fogo aumenta a abundância de ninhos de saúva (1) e as atividades de remoção de sementes (2) e desfolha (3), especialmente no ambiente de
Karine Santana Carvalho   +2 more
doaj   +1 more source

Colony size predicts division of labour in Attine ants [PDF]

open access: yes, 2014
Division of labour is central to the ecological success of eusocial insects, yet the evolutionary factors driving increases in complexity in division of labour are little known.
Alexander RD   +10 more
core   +3 more sources

Uninformed sacrifice: evidence against long-range alarm transmission in foraging ants exposed to a localized perturbation

open access: yes, 2015
It is well stablished that danger information can be transmitted by ants through relatively small distances, provoking either a state of alarm when they move away from potentially dangerous stimulus, or charge toward it aggressively.
Altshuler, E., Reyes, A., Tejera, F.
core   +1 more source

Trichome Removal by Hitchhikers in Two Leaf-cutting Ant Species (Hymenoptera: Formicidae)

open access: yesSociobiology, 2014
Despite the known evidence that hitchhiker ants protect workers against attack by phorid parasitoids, several alternative hypotheses are suggested for the occurrence of hitchhikers on leaf-cutting ants. One hypothesis suggests that hitchhikers clean leaf
Leandro Sousa-Souto
doaj   +1 more source

Leaf endophyte load influences fungal garden development in leaf-cutting ants

open access: yesBMC Ecology, 2012
Background Previous work has shown that leaf-cutting ants prefer to cut leaf material with relatively low fungal endophyte content. This preference suggests that fungal endophytes exact a cost on the ants or on the development of their colonies.
Van Bael Sunshine A   +4 more
doaj   +1 more source

Waste management in the stingless bee Melipona beecheii Bennett (Hymenoptera: Apidae) [PDF]

open access: yes, 2014
Waste management is important in insect societies because waste can be hazardous to adults, brood and food stores. The general organization of waste management and the influence of task partitioning, division of labor and age polyethism on waste ...
Hart, Adam G   +2 more
core   +4 more sources

Levels of leaf Herbivory in Amazonian trees from different stages In forest regeneration [PDF]

open access: yesActa Amazonica, 1999
Leaves from 120 canopy trees and 60 understory tree saplings growing in primary and secondary forests near Manaus, Brazil, were collected for determination of standing levels of herbivory (percent leaf area lost).
Heraldo L. VASCONCELOS
doaj   +1 more source

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