Aloetismo em Acromyrmex subterraneus brunneus Forel (Hymenoptera, Formicidae), durante o forrageamento, cultivo do jardim de fungo e devolução dos materiais forrageados

Forti, Luíz Carlos; Camargo, Roberto da Silva; Matos, Carlos Alberto Oliveira de; Andrade, Ana Paula Protti de; Lopes, Juliane Floriano Santos

doi:10.1590/s0085-56262004000100011

Cited by 11 publications

(5 citation statements)

References 10 publications

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“…Em A. subterraneus bruneus, pode-se verificar até quatro tamanhos de operárias, pelas medidas da cápsula cefálica: muito pequena, 0,7-0,8 mm; pequena, 0,9-1,1 mm; média, 1,2-1,6 mm; e grande, 1,7-2,0 mm. Cada tamanho de operária pode ser considerada como uma casta diferente, pois as operárias desempenham tarefas diferentes (Forti et al, 2004).…”

Section: Divisão De Trabalhounclassified

Formigas cultivadoras de fungos: estado da arte e direcionamento para pesquisas futuras

Nickele¹,

Pie²,

Filho³

et al. 2013

Pesq. Flor. Bras.

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A tribo Attini (Hymenoptera: Formicidae) compreende 14 gêneros com aproximadamente 230 espécies de formigas descritas que estão envolvidas em um mutualismo obrigatório com fungos. Este fungo é cultivado no interior das colônias para a alimentação das formigas, e tem como substrato uma variedade de material orgânico. O fungo é utilizado na dieta das formigas, que em retribuição fornecem ao fungo substratos para o crescimento, proteção contra parasitas ou competidores e asseguram a sua reprodução. Embora todas as espécies da tribo cultivem fungo, essas formigas são bastante heterogêneas em relação ao sistema de agricultura, tamanho da colônia e estrutura social, métodos de cultivo do fungo, forrageamento, etc. Nestarevisão são discutidas as principais características da agricultura, simbiose e história natural das formigas cultivadoras de fungos, bem como o direcionamento para as pesquisas futuras com essas formigas

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Section: Divisão De Trabalhounclassified

Formigas cultivadoras de fungos: estado da arte e direcionamento para pesquisas futuras

Nickele¹,

Pie²,

Filho³

et al. 2013

Pesq. Flor. Bras.

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“…Therefore, the foraging activity did not influence the development of the 1st workers in neither timing nor size. Workers from both Spoiled and Walker groups were characterised as the smallest worker size caste in A. subterraneus (Forti et al, 2004, Moreira et al, 2010.…”

Section: Resultsmentioning

confidence: 99%

Foraging for the fungus: why do Acromyrmex subterraneus (Formicidae) queens need to forage during the nest foundation phase?

Sales

Toledo

Zimerer

et al. 2021

Ecological Entomology

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1. Semiclaustral ant queens must pay the price of foraging to guarantee their survival and also that of their brood through the nest foundation phase. For leaf-cutting ant species, the challenge is even greater, as they also need to cultivate their symbiont fungus.2. We hypothesised that suppressing foraging activity could reflect in larger offspring and higher survival, as queens would be entirely dedicated to rearing the brood and initial fungus.3. By providing easy access to leaves or completely denying it, we evaluated how foraging runs interfere in Acromyrmex subterraneus queens' survival, productivity, and variation of body mass components.4. Three foraging conditions were simulated: Starved -no leaves, Spoiled -leaves inside the nest chamber, and Walker -leaves 3 m away from the nest chamber. We registered the number of dead queens, offspring, weight of the fungus garden, fresh and lean dry mass of the queens, as well as their lipid and water contents.5. Survival of Starved queens, which did not oviposit, was lower than that of Spoiled and Walker queens, although weight loss, water content, and lean dry mass were similar. While lipid content reduction was similar for Spoiled and Walker queens, the former had more larvae and pupae, and a heavier fungus garden than the latter, suggesting a greater rearing effort of Spoiled queens toward them both.6. The simulated foraging conditions provided novel data for a semiclaustral leaf-cutting ant species that evidences that fungus garden cultivation is definitively the main driving force for the colony founding success.

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“…This type of alloethism, that is, division of labour between ants of different sizes, has been observed in other leaf cutting ants, for example, Ac. subterraneus bruneus (Forti et al, 2004), A. colombica and A. sexdens rubropilosa (Toledo et al, 2016), and in the seed harvesting ant Messor bouvieri (Arnan et al, 2011). Large ants move faster than small ones and they can carry bigger fragments, which allows the colony to increase the vegetation biomass returned to the nest.…”

Section: Discussionmentioning

confidence: 99%

Walking and foraging activity of Acromyrmex subterraneus molestans (Hymenoptera: Formicidae) at different temperatures

Ramirez‐Olier

Sanches

Barbosa

et al. 2022

Physiological Entomology

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Acromyrmex subterraneus molestans (Hymenoptera: Formicidae) is a leaf-cutting ant species found in the Brazilian Cerrado and the Atlantic Forest and causes serious damages to cultivated plants. Knowledge about its foraging activity could help to improve the integrated pest management of this species and to better understand its ecology. The relationship between ambient temperature and the biomass collected by individuals of one Ac. subterraneus molestans colony was studied in the laboratory. The colony remained in an experimental room at 24 C and its foragers had access to an arena in an incubator set at six different temperatures (10, 16, 22, 28, 34 or 40 C). Fresh leaves of Hibiscus sp. were put in the arena and the flow of ants leaving and returning to the nest, the proportion of ants returning to the nest with a leaf fragment, as well as the dry mass of these fragments, were evaluated during 1 h for each temperature. The head width of foraging ants (laden and unladen) and their running speed were also measured. The rate of biomass collected was almost null at 10 C, increased from 16 to 34 C, and decreased abruptly at 40 C. The size of the workers did not vary across temperatures, and the running speed increased with increasing temperatures but more rapidly for unloaded ants than for loaded ones. The lower flow intensity at 28 and 40 C was somewhat compensated at the individual level by the selection of larger leaf fragments or by an increase in the probability to return loaded to the nest, respectively. The results obtained in this study could improve the management of these ants, allowing to target the most favourable meteorological conditions to apply toxic baits, increase the probability for the baits to be carried to the nest, in addition to reducing their availability to nontarget organisms. Furthermore, they could be used to make predictions on the effects of global warming on the foraging activity of this species.

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Aloetismo em Acromyrmex subterraneus brunneus Forel (Hymenoptera, Formicidae), durante o forrageamento, cultivo do jardim de fungo e devolução dos materiais forrageados

Cited by 11 publications

References 10 publications

Formigas cultivadoras de fungos: estado da arte e direcionamento para pesquisas futuras

Formigas cultivadoras de fungos: estado da arte e direcionamento para pesquisas futuras

Foraging for the fungus: why do Acromyrmex subterraneus (Formicidae) queens need to forage during the nest foundation phase?

Walking and foraging activity of Acromyrmex subterraneus molestans (Hymenoptera: Formicidae) at different temperatures

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