Comunicação e comportamento de formigas poneromorfas

Châline, Nicolas; Ferreira, Ronara Souza; Yagound, Boris; Silva, Janiele Pereira; Chameron, Stéphane

doi:10.7476/9788574554419.0015

Cited by 3 publications

(5 citation statements)

References 239 publications

(176 reference statements)

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“…even though it is smaller than its opponent), this victory may remain in the memory of both participants and influence subsequent encounters. Thus, in dominance hierarchies, both the initial intrinsic fighting abilities and the history of fighting outcomes have an effect on rank acquisition [16,17]. In addition, asymmetry in dyadic relationships may also be caused by factors other than fighting abilities, such as the possession of a particular knowledge (e.g.…”

Section: Introductionmentioning

confidence: 99%

Female emancipation in a male dominant, sexually dimorphic primate under natural conditions

et al. 2021

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In most group-living animals, a dominance hierarchy reduces the costs of competition for limited resources. Dominance ranks may reflect prior attributes, such as body size, related to fighting ability or reflect the history of self-reinforcing effects of winning and losing a conflict (the winner-loser effect), or both. As to prior attributes, in sexually dimorphic species, where males are larger than females, males are assumed to be dominant over females. As to the winner-loser effect, the computational model DomWorld has shown that despite the female’s lower initial fighting ability, females achieve some degree of dominance of females over males. In the model, this degree of female dominance increases with the proportion of males in a group. This increase was supposed to emerge from the higher fraction of fights of males among themselves. These correlations were confirmed in despotic macaques, vervet monkeys, and in humans. Here, we first investigate this hypothesis in DomWorld and next in long-term data of 9,300 observation hours on six wild groups of robust capuchin monkeys (Sapajus libidinosus; S. nigritus, and S. xanthosternos) in three Brazilian sites. We test whether both the proportion of males and degree of female dominance over males are indeed associated with a higher relative frequency of aggression among males and a higher relative frequency of aggression of females to males. We confirm these correlations in DomWorld. Next, we confirm in empirical data of capuchin monkeys that with the proportion of males in the group there is indeed an increase in female dominance over males, and in the relative frequency of both male-male aggression and aggression of females to males and that the female dominance index is significantly positively associated with male male aggression. Our results reveal that adult sex ratio influences the power relation between the sexes beyond predictions from socioecological models.

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Section: Introductionmentioning

confidence: 99%

Female emancipation in a male dominant, sexually dimorphic primate under natural conditions

et al. 2021

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“…In conclusion, our results suggest that foraging decision-making is also complex in species that do not use foraging trails and are considered ancestral regarding their social organization and division of labor ( Châline et al 2015 ). Communication between leaders and followers seems to be modulated in many species by both internal, external, and social factors, as well as immediate and prior experience and knowledge.…”

Section: Discussionmentioning

confidence: 76%

Tandem running by foraging Pachycondyla striata workers in field conditions vary in response to food type, food distance, and environmental conditions

et al. 2021

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Ants show collective and individual behavioural flexibility in their response to immediate context, choosing for example between different foraging strategies. In Pachycondyla striata, workers can forage solitarily or recruit and guide nestmates to larger food sources through tandem running. Although considered more ancestral and less efficient than pheromone trail-laying, this strategy is common especially in species with small colony size. What is not known is how the decision to recruit or follow varies according to the immediate context. That is, how fine adjustments in information transfer affect immediate foraging decisions at the colony level. Here, we studied individually marked workers and evaluated their foraging decisions when food items varied in nature (protein vs carbohydrate), size, and distance from the nest at different temperatures and humidity levels. Our results show that tandem run leaders and potential followers adjust their behaviour according to a combination of external factors. While 84.2% of trips were solitary, most ants (81%) performed at least one tandem run. However, tandem runs were more frequent for nearby resources and at higher relative humidity. Interestingly, when food items were located far away, tandem runs were more successful when heading to protein sources (75%) compared to carbohydrate sources (42%). Our results suggest that the social information transfer between leaders and followers conveys more information than previously thought, and also relies on their experience and motivation.

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“…() and Châline et al . (). Our population sample contained 14 colonies of N. apicalis morph 4, seven colonies of N. apicalis morph 7, and seven colonies of N. verenae morph 1.…”

Section: Methodsmentioning

confidence: 97%

“…This complex is composed of highly related species with very similar life histories (Fresneau, 1994;Wild, 2005), making this an ideal model to study the factors influencing non-nestmate discrimination processes. Four species have been described so far in this complex [N. apicalis (Latreille, 1802), N. cooki (Mackay & Mackay, 2010), N. obscuricornis (Emery, 1890) and N. verenae (Forel, 1922)], but recent studies have shown that N. apicalis and N. verenae in fact comprise several cryptic species (Delabie et al, 2008;Ferreira et al, 2010;Châline et al, 2015). These ants forage solitarily on the litter for small living or dead prey at mean distances of 15 m from the entrance of their nest but they can go to more than 40 m. Nest density and foraging strategy lead to an overlapping of foraging areas where inter-colony encounter rates can be relatively frequent.…”

Section: Introductionmentioning

confidence: 99%

“…(Ferreira et al, 2010;Evison et al, 2012). Species were determined by morphological and genetic analyses (data not shown) and identified according to Delabie et al (2008), Ferreira et al (2010 and Châline et al (2015). Our population sample contained 14 colonies of N. apicalis morph 4, seven colonies of N. apicalis morph 7, and seven colonies of N. verenae morph 1.…”

Section: Introductionmentioning

confidence: 99%

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Interspecific variation in neighbour–stranger discrimination in ants of theNeoponera apicaliscomplex

Yagound

Crowet

Leroy

et al. 2016

Ecological Entomology

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1. The ecological success of social insects lies in their ability to prevent the exploitation of colony resources by competitors or parasites. Nestmate recognition is therefore of crucial importance in maintaining the integrity of the colony. Furthermore, inter‐colony competitive relationships are often complex, as many species discriminate between neighbours and strangers, with reduced (the dear enemy phenomenon) or increased levels of aggression towards nearby colonies, depending on the species. In this context, between‐species comparisons could be particularly helpful to investigate the proximate causes underlying this context‐dependent phenomenon, but these are notoriously lacking. 2. Here an attempt was made to circumvent this drawback by studying three closely related sympatric ant species with very similar life histories that belong to the Neoponera apicalis complex. The present study investigated how nestmate recognition and inter‐colony competitive relationships were influenced by spatial, chemical and genetic distances between colonies. 3. It was found that one species, N. apicalis morph 7, showed a clear dear enemy phenomenon with no influence of chemical and genetic distances, suggesting the existence of a learning process. In contrast, N. apicalis morph 4 and Neoponera verenae morph 1 failed to show any strong discrimination between close and distant non‐nestmates. 4. These results are discussed in the light of the observed interspecific variation in nesting preferences, possibly constraining the opportunities of familiarisation between nearby nests, and modulating the competition for resources between colonies. 5. It is argued that this study further reinforces the relative threat level hypothesis as an ultimate explanation for neighbour–stranger discrimination processes.

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Comunicação e comportamento de formigas poneromorfas

Cited by 3 publications

References 239 publications

Female emancipation in a male dominant, sexually dimorphic primate under natural conditions

Female emancipation in a male dominant, sexually dimorphic primate under natural conditions

Tandem running by foraging Pachycondyla striata workers in field conditions vary in response to food type, food distance, and environmental conditions

Interspecific variation in neighbour–stranger discrimination in ants of theNeoponera apicaliscomplex

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