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Mikissa JB, Ndjomba CD, Mabaka JM, Delabie JHC, Tindo M, Fresneau D, Mercier JL. Historical records and current distribution of the little fire ant, Wasmannia auropunctataRoger (Hymenoptera: Formicidae), in Gabon. Afr J Ecol 2016. [DOI: 10.1111/aje.12311] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jean B. Mikissa
- Université Paris 13 Nord; LEEC UMR-CNRS 7153, 99 av. J.B. Clément F-93430 Villetaneuse France
- École Nationale des Eaux et Forêts (ENEF); BP 3960 Libreville Gabon
| | | | - Jean M. Mabaka
- École Nationale des Eaux et Forêts (ENEF); BP 3960 Libreville Gabon
| | - Jean Hubert C. Delabie
- Laboratório de Mirmecologia; Convention UESC/CEPLAC; Centro de Pesquisas do Cacau; C.P. 07 45600-000 Itabuna Bahia Brazil
| | - Maurice Tindo
- Département de biologie des organismes animaux; Faculté des Sciences de l'université de Douala; BP 24157 Douala Cameroun
| | - Dominique Fresneau
- Université Paris 13 Nord; LEEC UMR-CNRS 7153, 99 av. J.B. Clément F-93430 Villetaneuse France
| | - Jean L. Mercier
- IRBI - UMR 7261 CNRS/Université François-Rabelais de Tours; UFR Sciences et Techniques; Parc Grandmont; Avenue Monge 37200 Tours France
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Yagound B, Gouttefarde R, Leroy C, Belibel R, Barbaud C, Fresneau D, Chameron S, Poteaux C, Châline N. Fertility Signaling and Partitioning of Reproduction in the Ant Neoponera apicalis. J Chem Ecol 2015; 41:557-66. [PMID: 26018617 DOI: 10.1007/s10886-015-0591-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2015] [Revised: 03/30/2015] [Accepted: 05/19/2015] [Indexed: 11/30/2022]
Abstract
All individuals in social insect colonies benefit from being informed about the presence and fertility state of reproducers. This allows the established reproductive individuals to maintain their reproductive monopoly without the need for physical control, and the non-reproductive individuals to make appropriate reproductive choices. Here, we studied whether fertility signaling is responsible for the partitioning of reproduction in the ant Neoponera apicalis. This species forms small colonies from one single-mated queen, with workers establishing reproductive hierarchies when hopelessly queenless. Previous studies identified putative fertility signals, particularly the hydrocarbon 13-methylpentacosane (13-MeC25), and have shown that precise status discrimination based on these signals could be involved in the regulation of reproductive activities. Here, we extend these findings and reveal that all individuals, be they queens or workers, differ in their cuticular hydrocarbon profile according to fertility state. Proportions of 13-MeC25 were a strong predictor of an individual's ovarian activity, and could, thus, advertise the established reproducer(s) in both queenright and queenless conditions. Furthermore, this compound might play a key role in the establishment of the reproductive hierarchy, since workers with low fertility at the onset of hierarchy formation already have relatively high amounts of 13-MeC25. Dyadic encounters showed that individuals with experimentally increased amounts of 13-MeC25 triggered less agonistic interactions from top rankers, in accord with them "advertising" higher status. Thus, these bioassays supported the use of 13-MeC25 by competing ants. This simple recognition system potentially allows permanent regulation of partitioning of reproduction in this species.
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Affiliation(s)
- Boris Yagound
- Laboratoire d'Ethologie Expérimentale et Comparée, E.A. 4443, Université Paris 13, Sorbonne Paris Cité, 93430, Villetaneuse, France,
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3
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Nettel-Hernanz A, Lachaud JP, Fresneau D, López-Muñoz RA, Poteaux C. Biogeography, cryptic diversity, and queen dimorphism evolution of the Neotropical ant genus Ectatomma Smith, 1958 (Formicidae, Ectatomminae). ORG DIVERS EVOL 2015. [DOI: 10.1007/s13127-015-0215-9] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
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Ferreira RS, Cros E, Fresneau D, Rybak F. Behavioural Contexts of Sound Production in Pachycondyla Ants (Formicidae: Ponerinae). ACTA ACUST UNITED AC 2014. [DOI: 10.3813/aaa.918753] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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5
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Goss S, Fresneau D, Deneubourg JL, Lachaud JP, Valenzuela-Gonzalez J. Individual foraging in the antPachycondyla apicalis. Oecologia 2013; 80:65-9. [DOI: 10.1007/bf00789933] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/1988] [Indexed: 10/26/2022]
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6
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Cabanes G, Bennani Y, Fresneau D. Enriched topological learning for cluster detection and visualization. Neural Netw 2012; 32:186-95. [PMID: 22377661 DOI: 10.1016/j.neunet.2012.02.019] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2011] [Revised: 01/27/2012] [Accepted: 02/07/2012] [Indexed: 10/14/2022]
Abstract
The exponential growth of data generates terabytes of very large databases. The growing number of data dimensions and data objects presents tremendous challenges for effective data analysis and data exploration methods and tools. Thus, it becomes crucial to have methods able to construct a condensed description of the properties and structure of data, as well as visualization tools capable of representing the data structure from these condensed descriptions. The purpose of our work described in this paper is to develop a method of describing data from enriched and segmented prototypes using a topological clustering algorithm. We then introduce a visualization tool that can enhance the structure within and between groups in data. We show, using some artificial and real databases, the relevance of the proposed approach.
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Affiliation(s)
- Guénaël Cabanes
- LIPN-CNRS, UMR 7030, 99 Avenue J-B. Clément, 93430, Villetaneuse, France.
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Lenoir JC, Lachaud JP, Nettel A, Fresneau D, Poteaux C. The role of microgynes in the reproductive strategy of the neotropical ant Ectatomma ruidum. Naturwissenschaften 2011; 98:347-56. [PMID: 21380620 DOI: 10.1007/s00114-011-0774-3] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2010] [Revised: 02/15/2011] [Accepted: 02/16/2011] [Indexed: 11/24/2022]
Abstract
Miniaturized queens, microgynes, are regarded as an alternative reproductive strategy sparsely present through the ant world. The described roles of miniaturized queens include alternative short-distance dispersal morphs, an adaptation to polygyny and inquiline parasites. Some of these inquiline parasite microgynes have been described as a separate species from their host. In the poneromorph group, miniaturized queens are only reported in two Mexican populations of two Ectatomminae: Ectatomma tuberculatum, in which small queens represent an inquiline species (Ectatomma parasiticum) and Ectatomma ruidum. E. ruidum presents apparently facultative polygyny with microgynes. We used mitochondrial DNA markers and newly developed microsatellite loci to investigate the status as well as the role of microgynes in E. ruidum. We confirmed that microgynes and macrogynes are from the same species. This species is almost exclusively monogynous and monoandrous, supernumerary dealate queens of both types being actually daughters of the mother queen. An apparently polygynous nest was more often headed by a macrogyne than a microgyne. We didn't find any inbreeding or isolation by distance in the studied population, indicating that new gynes are inseminated by unrelated males and can establish a new nest far from their natal nest. However, re-adoption of daughter queens seems to be the rule and rate of microgyny appears to be linked to nest density and environmental factors.
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Affiliation(s)
- Jean-Christophe Lenoir
- Laboratoire d'Ethologie Expérimentale et Comparée, EA 4443, Université Paris-Nord, UFR L.S.H.S, Villetaneuse, France.
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Agostini C, Agudelo PA, Bâ K, Barber PA, Bisol PM, Brouat C, Burgess TI, Calves I, Carrillo Avila M, Chow S, Cordes L, Da Silva D, Dalecky A, De Meester L, Doadrio I, Dobigny G, Duplantier JM, Evison SEF, Ford R, Fresneau D, Galetti PM, Gauthier P, Geldof S, Granjon L, Guérin F, St J Hardy GE, Hernandez Escobar C, Hima K, Hu J, Huang L, Humeau L, Jansen B, Jaquemet S, Jiang ZQ, Jung SJ, Kim BS, Kim CH, Kim JO, Lai CH, Laroche J, Lavergne E, Lawton-Rauh A, Le Corre M, Leach MM, Lee J, Leo AE, Lichtenzveig J, Lin L, Linde CC, Liu SF, Marino IAM, McKeown NJ, Nohara K, Oh MJ, Okamoto H, Oliver R, Olivera Angel M, Ornelas-García CP, Orsini L, Ostos Alfonso H, Othman AS, Papetti C, Patarnello T, Pedraza-Lara C, Piller KR, Poteaux C, Requier JB, Roziana MK, Semba Y, Sembene M, Shah RM, Shahril AR, Shao A, Shaw PW, Song L, Souza Ferreira R, Su YQ, Suzuki N, Tatard C, Taylor KM, Taylor PWJ, Thiam M, Valbuena R, Wang H, Yang BG, Yuan Q, Zajonz U, Zane L, Zhu L, Zhuang ZM, Zulaiha AR. Permanent genetic resources added to Molecular Ecology Resources Database 1 October 2010-30 November 2010. Mol Ecol Resour 2011; 11:418-21. [PMID: 21429157 DOI: 10.1111/j.1755-0998.2010.02970.x] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
This article documents the addition of 277 microsatellite marker loci to the Molecular Ecology Resources Database. Loci were developed for the following species: Ascochyta rabiei, Cambarellus chapalanus, Chionodraco hamatus, Coptis omeiensis, Cynoscion nebulosus, Daphnia magna, Gerbillus nigeriae, Isurus oxyrinchus, Lates calcarifer, Metacarcinus magister, Oplegnathus fasciatus, Pachycondyla verenae, Phaethon lepturus, Pimelodus grosskopfii, Rotylenchulus reniformis, Scomberomorus niphonius, Sepia esculenta, Terapon jarbua, Teratosphaeria cryptica and Thunnus obesus. These loci were cross-tested on the following species: Austropotamobius italicus, Cambarellus montezumae, Cambarellus puer, Cambarellus shufeldtii, Cambarellus texanus, Chionodraco myersi, Chionodraco rastrospinosus, Coptis chinensis, Coptis chinensis var. brevisepala, Coptis deltoidea, Coptis teeta, Orconectes virilis, Pacifastacus leniusculus, Pimelodus bochii, Procambarus clarkii, Pseudopimelodus bufonius, Rhamdia quelen, Sepia andreana, Sepiella maindroni, Thunnus alalunga, Thunnus albacares, Thunnus maccoyii, Thunnus orientalis, Thunnus thynnus and Thunnus tonggol.
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Affiliation(s)
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- Department of Biology-University of Padova, via U. Bassi 58/b, Padua, Italy
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Ferreira RS, Poteaux C, Delabie JHC, Fresneau D, Rybak F. Stridulations reveal cryptic speciation in neotropical sympatric ants. PLoS One 2010; 5:e15363. [PMID: 21203529 PMCID: PMC3008743 DOI: 10.1371/journal.pone.0015363] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2010] [Accepted: 11/11/2010] [Indexed: 11/18/2022] Open
Abstract
The taxonomic challenge posed by cryptic species underlines the importance of using multiple criteria in species delimitation. In the current paper we tested the use of acoustic analysis as a tool to assess the real diversity in a cryptic species complex of Neotropical ants. In order to understand the potential of acoustics and to improve consistency in the conclusions by comparing different approaches, phylogenetic relationships of all the morphs considered were assessed by the analysis of a fragment of the mitochondrial DNA cytochrome b. We observed that each of the cryptic morph studied presents a morphologically distinct stridulatory organ and that all sympatric morphs produce distinctive stridulations. This is the first evidence of such a degree of specialization in the acoustic organ and signals in ants, which suggests that stridulations may be among the cues used by these ants during inter-specific interactions. Mitochondrial DNA variation corroborated the acoustic differences observed, confirming acoustics as a helpful tool to determine cryptic species in this group of ants, and possibly in stridulating ants in general. Congruent morphological, acoustic and genetic results constitute sufficient evidence to propose each morph studied here as a valid new species, suggesting that P. apicalis is a complex of at least 6 to 9 species, even if they present different levels of divergence. Finally, our results highlight that ant stridulations may be much more informative than hitherto thought, as much for ant communication as for integrative taxonomists.
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Affiliation(s)
- Ronara Souza Ferreira
- Laboratoire d'Ethologie Expérimentale et Comparée, LEEC EA 4443, Université Paris 13, Villetaneuse, France.
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Corbara B, Lachaud JP, Fresneau D. Individual Variability, Social Structure and Division of Labour in the Ponerine Ant Ectatomma ruidum Roger (Hymenoptera, Formicidae). Ethology 2010. [DOI: 10.1111/j.1439-0310.1989.tb00490.x] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Foucaud J, Orivel J, Loiseau A, Delabie JHC, Jourdan H, Konghouleux D, Vonshak M, Tindo M, Mercier JL, Fresneau D, Mikissa JB, McGlynn T, Mikheyev AS, Oettler J, Estoup A. Worldwide invasion by the little fire ant: routes of introduction and eco-evolutionary pathways. Evol Appl 2010; 3:363-74. [PMID: 25567931 PMCID: PMC3352468 DOI: 10.1111/j.1752-4571.2010.00119.x] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2009] [Accepted: 12/24/2009] [Indexed: 11/30/2022] Open
Abstract
Biological invasions are generally thought to occur after human aided migration to a new range. However, human activities prior to migration may also play a role. We studied here the evolutionary genetics of introduced populations of the invasive ant Wasmannia auropunctata at a worldwide scale. Using microsatellite markers, we reconstructed the main routes of introduction of the species. We found three main routes of introduction, each of them strongly associated to human history and trading routes. We also demonstrate the overwhelming occurrence of male and female clonality in introduced populations of W. auropunctata, and suggest that this particular reproduction system is under selection in human-modified habitats. Together with previous researches focused on native populations, our results suggest that invasive clonal populations may have evolved within human modified habitats in the native range, and spread further from there. The evolutionarily most parsimonious scenario for the emergence of invasive populations of the little fire ant might thus be a two-step process. The W. auropunctata case illustrates the central role of humans in biological change, not only due to changes in migration patterns, but also in selective pressures over species.
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Affiliation(s)
- Julien Foucaud
- INRA, UMR CBGP (INRA/IRD/Cirad/Montpellier SupAgro) Montferrier-sur-Lez cedex, France
| | - Jérôme Orivel
- Université de Toulouse, UPS, EDB (Laboratoire Evolution et Diversité Biologique) Toulouse, France ; CNRS, EDB (Laboratoire Evolution et Diversité Biologique) Toulouse, France
| | - Anne Loiseau
- INRA, UMR CBGP (INRA/IRD/Cirad/Montpellier SupAgro) Montferrier-sur-Lez cedex, France
| | | | - Hervé Jourdan
- INRA, UMR CBGP (INRA/IRD/Cirad/Montpellier SupAgro) Montferrier-sur-Lez cedex, France
| | - Djoël Konghouleux
- INRA, UMR CBGP (INRA/IRD/Cirad/Montpellier SupAgro) Montferrier-sur-Lez cedex, France
| | - Merav Vonshak
- Department of Zoology, Tel-Aviv University Tel-Aviv, Israel
| | - Maurice Tindo
- Département de biologie des organismes animaux, Faculté des sciences de l'université de Douala Douala, Cameroun
| | - Jean-Luc Mercier
- Institut de Recherche sur la Biologie de l'Insecte, UMR CNRS 6035, Faculté des Sciences et Techniques Tours, France
| | - Dominique Fresneau
- Laboratoire d'Ethologie Expérimentale et Comparée, CNRS UMR 7153 Université Paris 13, Villetaneuse, France
| | - Jean-Bruno Mikissa
- Institut de Recherche sur la Biologie de l'Insecte, UMR CNRS 6035, Faculté des Sciences et Techniques Tours, France
| | - Terry McGlynn
- Department of Biology, University of San Diego San Diego, CA, USA
| | | | - Jan Oettler
- Biologie I, Universität Regensburg Regensburg, Germany
| | - Arnaud Estoup
- INRA, UMR CBGP (INRA/IRD/Cirad/Montpellier SupAgro) Montferrier-sur-Lez cedex, France
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Blacher P, Lecoutey E, Fresneau D, Nowbahari E. Reproductive hierarchies and status discrimination in orphaned colonies of Pachycondyla apicalis ants. Anim Behav 2010. [DOI: 10.1016/j.anbehav.2009.10.008] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Galassi U, Cabanes G, Fresneau D. Modeling Evolving Behaviors in Ant Colonies. Journal of Intelligent Systems 2009. [DOI: 10.1515/jisys.2009.18.4.353] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Depickère S, Fresneau D, Deneubourg JL. Effect of social and environmental factors on ant aggregation: a general response? J Insect Physiol 2008; 54:1349-1355. [PMID: 18706421 DOI: 10.1016/j.jinsphys.2008.07.013] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/31/2008] [Revised: 07/07/2008] [Accepted: 07/21/2008] [Indexed: 05/26/2023]
Abstract
In social species, the interactions that occur between individuals and also between individuals and their environment can lead to various spatial distributions. Our goal was to understand how both factors (social and environmental) can affect such spatial distribution of individuals. Aggregation experiments were conducted on the ant Crematogaster scutellaris: the level of inter-attraction between individuals was characterized and the influence of an environmental factor (light intensity) was studied. Two ethological castes (brood-tenders and foragers) were tested, showing a strong and similar aggregation pattern-although faster for foragers. This difference could be explained by a higher degree of inter-attraction for brood-tenders, resulting in longer interaction time and therefore a slower aggregation rate. We also showed the influence of light conditions by carrying out experiments in total darkness and under red light. C. scutellaris appeared highly sensitive to the red light, aggregating just underneath it. Nevertheless, the level of aggregation is not affected by the luminosity condition. These results are discussed in relation to the ecology of the species, and are compared with results obtained in another ant species, Lasius niger, which exhibits a similar response to aggregation. We propose, therefore, a general link between the level/pattern of aggregation and polyethism in ants.
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Affiliation(s)
- Stéphanie Depickère
- Laboratoire d'Ethologie Expérimentale et Comparée, Université Paris XIII, Av. J.B. Clément, Villetaneuse, France.
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Denis D, Chameron S, Costille L, Pocheville A, Châline N, Fresneau D. Workers agonistic interactions in queenright and queenless nests of a polydomous ant society. Anim Behav 2008. [DOI: 10.1016/j.anbehav.2007.06.016] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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17
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Hora RR, Ionescu-Hirsh A, Simon T, Delabie J, Robert J, Fresneau D, Hefetz A. Postmating changes in cuticular chemistry and visual appearance in Ectatomma tuberculatum queens (Formicidae: Ectatomminae). Naturwissenschaften 2008; 95:55-60. [PMID: 17724573 DOI: 10.1007/s00114-007-0287-2] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/15/2004] [Revised: 06/30/2007] [Accepted: 06/30/2007] [Indexed: 11/24/2022]
Abstract
In the ectatommine ant Ectatomma tuberculatum, the visual appearance of queens changes after mating and ovarian development in that their cuticle turns from shiny to matte. In this study, we have shown that this change seems to be caused by 15-fold accumulation of hydrocarbons, in particular heptacosane that covers the multiple grooves present on the cuticular surface creating a wax coat in mated fully fertile queens. Analyses of the scrapped wax revealed that it is composed largely of heptacosane. Peak-by-peak comparison of the cuticular hydrocarbon (CHC) composition of mated, virgin with developed ovaries and virgin with nondeveloped ovaries revealed significant differences between the queen groups. Although the total amount of the CHC of virgin queens with developed ovaries was not higher than virgin queens that did not have developed ovaries, the composition showed a shift toward the mated queen. While it is possible that the large accumulation of hydrocarbons may give extra physical and chemical protection to queens, we propose that the switch in the relative abundance of heptacosane and nonacosane and perhaps of other components is indicative of being a mating and fertility cue. This is the first report in social insects where external chemical changes are accompanied by changes in visual appearance.
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Affiliation(s)
- Riviane R Hora
- Laboratoire d'Ethologie Expérimentale et Comparée (CNRS UMR 7153), Université Paris 13, 99 Avenue J.-B. Clément, 93430, Villetaneuse, France.
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Hora RR, Poteaux C, Doums C, Fresneau D, Fénéron R. Egg Cannibalism in a Facultative Polygynous Ant: Conflict for Reproduction or Strategy to Survive? Ethology 2007. [DOI: 10.1111/j.1439-0310.2007.01391.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Denis D, Blatrix R, Fresneau D. How an ant manages to display individual and colonial signals by using the same channel. J Chem Ecol 2006; 32:1647-61. [PMID: 16871445 DOI: 10.1007/s10886-006-9099-7] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2006] [Revised: 03/14/2006] [Accepted: 03/28/2006] [Indexed: 11/29/2022]
Abstract
Cuticular hydrocarbons are used by some ants to discriminate nestmates from nonnestmates. Every member of the colony bears the same pattern because they are continuously exchanged among nestmates. The postpharyngeal gland (PPG) stores the blend of hydrocarbons and is involved in the distribution of this common mixture. However, some individuals might display individual information on the cuticle (such as a chemical signal of fertility) that must not be mixed within the common pool. We investigated how this paradox is solved in the ant Pachycondyla goeldii by analyzing the nature and localization of colonial and fertility signals. Workers in a queenless condition showed a dominance hierarchy that was correlated with ovarian development. Hydrocarbons from the cuticle and the PPG analyzed by gas chromatography (GC) and identified by GC-mass spectrometry showed a clear discrimination among colonies, supporting the involvement of the PPG in the colonial identity signal. We identified and selected 11 cuticular hydrocarbons that permitted us to discriminate ovarian development classes and that might function as a fertility signal. They allowed clear colony discrimination as well, which suggests that the two signals (the individual signal of fertility and the common signal of colony identity) can be conveyed by the same compounds. However, the hydrocarbons in the PPG did not discriminate among ovarian developmental classes, suggesting that the portion of variation in the cuticular hydrocarbons constituting the fertility signal is superimposed on the signal of colony identity.
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Affiliation(s)
- Damien Denis
- Laboratoire d'Ethologie Expérimentale et Comparée (UMR CNRS 7153), Université Paris Nord, 99 avenue J.-B. Clément, 93430, Villetaneuse, France.
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Lucas C, Pho DB, Jallon JM, Fresneau D. Role of cuticular hydrocarbons in the chemical recognition between ant species in the Pachycondyla villosa species complex. J Insect Physiol 2005; 51:1148-57. [PMID: 16055148 DOI: 10.1016/j.jinsphys.2005.06.003] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/07/2005] [Revised: 06/09/2005] [Accepted: 06/10/2005] [Indexed: 05/03/2023]
Abstract
Cuticular hydrocarbons (HCs) play important roles in insect communication but few studies clearly demonstrate the direct link between HCs and nestmate recognition. Therefore, cuticular lipids were extracted from ants, their HC and non-HC fractions as well as the three principal classes of HCs (n-alkanes, branched alkanes and alkenes) were purified and tested using an immobilizing "joust" device which allowed quantification of early pairwise behavioural responses, mandibular opening and antennal retraction, without occurrence of subsequent damages as in classic dyadic encounters. Chemical recognition of ants was studied at three levels of interactions (intra-colonial, intra-specific and inter-specific). Three closely related species already chemically characterized were used: Pachycondyla villosa (Pv), P. inversa (Pi) and P. subversa (Ps). Each species had its own behavioural responses. Moreover, responses of Pi and Ps towards Pv were significantly longer, than they were between themselves whereas Pv ants were equally aggressive towards Pi and Ps. These differences are in agreement with the results of the cluster analysis of the cuticular HCs profiles that place Pi closer to Ps. In support of the idea that components of cuticular lipids profiles are important for recognition, we found that only the HC fraction and its branched subfraction elicited a behavioural response of Ps workers. It is suggested that internally branched methyl- and dimethylalkanes are involved in recognition behaviour.
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Affiliation(s)
- C Lucas
- Mécanismes de communication, Université Paris Sud, CNRS-UMR 8620, 91405 Orsay Cedex, France.
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Hora RR, Doums C, Poteaux C, Fénéron R, Valenzuela J, Heinze J, Fresneau D. Small queens in the ant Ectatomma tuberculatum: a new case of social parasitism. Behav Ecol Sociobiol 2005. [DOI: 10.1007/s00265-005-0040-9] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Pezon A, Denis D, Cerdan P, Valenzuela J, Fresneau D. Queen movement during colony emigration in the facultatively polygynous ant Pachycondyla obscuricornis. Naturwissenschaften 2004; 92:35-9. [PMID: 15551027 DOI: 10.1007/s00114-004-0583-z] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2004] [Accepted: 10/11/2004] [Indexed: 11/29/2022]
Abstract
In ants, nest relocations are frequent but nevertheless perilous, especially for the reproductive caste. During emigrations, queens are exposed to predation and face the risk of becoming lost. Therefore the optimal strategy should be to move the queen(s) swiftly to a better location, while maintaining maximum worker protection at all times in the new and old nests. The timing of that event is a crucial strategic issue for the colony and may depend on queen number. In monogynous colonies, the queen is vital for colony survival, whereas in polygynous colonies a queen is less essential, if not dispensable. We tested the null hypothesis that queen movement occurs at random within the sequence of emigration events in both monogynous and polygynous colonies of the ponerine ant Pachycondyla obscuricornis. Our study, based on 16 monogynous and 16 polygynous colony emigrations, demonstrates for the first time that regardless of the number of queens per colony, the emigration serial number of a queen occurs in the middle of all emigration events and adult ant emigration events, but not during brood transport events. It therefore appears that the number of workers in both nests plays an essential role in the timing of queen movement. Our results correspond to a robust colony-level strategy since queen emigration is related neither to colony size nor to queen number. Such an optimal strategy is characteristic of ant societies working as highly integrated units and represents a new instance of group-level adaptive behaviors in social insect colonies.
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Affiliation(s)
- Antoine Pezon
- Laboratoire d'Ethologie Expérimentale et Comparée, CNRS FRE 2413, Université Paris Nord, 99, avenue J.-B. Clément, 93430 Villetaneuse, France.
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Lucas C, Pho DB, Fresneau D, Jallon JM. Hydrocarbon circulation and colonial signature in Pachycondyla villosa. J Insect Physiol 2004; 50:595-607. [PMID: 15234620 DOI: 10.1016/j.jinsphys.2004.04.006] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/08/2004] [Revised: 04/07/2004] [Accepted: 04/08/2004] [Indexed: 05/24/2023]
Abstract
In ants, both cuticular and postpharyngeal gland (PPG) hydrocarbons (HCs) have been involved in nestmate recognition. However, no detailed comparison is available. A comparative study including also high density lipophorin (HDLp), an internal HC carrier, was therefore undertaken on Pachycondyla villosa. Purified HDLp is an 820 kDa lipoprotein with a density of 1.114 g/ml and two 245 and 80 kDa apo-proteins. Its hydrocarbon profile is very similar with the cuticular one, in agreement with its hydrocarbon carrier function. Conversely, n-alkanes and externally branched monomethylalkanes are markedly decreased in the PPG. According to their physical properties, this suggests that they are involved in waterproofing on the cuticle. The PPG actually contains only internally branched mono-, dimethylalkanes or monomethylalkenes; their greater fluidity is more adequate for chemical communication. The percentages of some of them are statistically not different between the cuticle and PPG. Their mixtures vary with colonies and they may thus be involved in colonial signature. A scheme for hydrocarbon circulation is discussed, involving lipophorin, cuticle, PPG and self-grooming in one individual, a pathway complementary or alternative to the selective delivery by lipophorin in some other insects. HCs are then distributed between nestmates' cuticles through allo-grooming and physical contacts.
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Affiliation(s)
- C Lucas
- Mécanismes de communication, Université Paris Sud, CNRS-UMR 8620, 91405 Orsay, France.
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Depickère S, Fresneau D, Deneubourg JL. The influence of red light on the aggregation of two castes of the ant, Lasius niger. J Insect Physiol 2004; 50:629-35. [PMID: 15234623 DOI: 10.1016/j.jinsphys.2004.04.009] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/22/2004] [Revised: 04/17/2004] [Accepted: 04/20/2004] [Indexed: 05/24/2023]
Abstract
Insects are generally described as essentially blind to red wavelengths but sensitive to ultraviolet. Therefore, ants are generally reared in nests where "obscurity" is obtained by the use of a red filter. Yet, no study has been done in order to confirm this idea and to verify whether ants behave differently with or without red light. We performed aggregation experiments with the ant Lasius niger under red light and in total darkness to control the sensitivity of workers. Aggregation is a basic behavior associated with the origin of sociality and with the spatial organization of the colony. We demonstrate that L. niger is sensitive to red wavelengths. Moreover, we show that workers behave differently depending on their ethological caste: foragers aggregate well in total darkness but show low assembly under red light, whereas brood-tenders aggregate well in both conditions. For the first time, a link between vision, social organization and spatial patterns is revealed. The results are discussed relative to their adaptive value and relative to the physiology of the workers. Hypotheses are formulated concerning the acquisition of this change of behavior between castes.
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Affiliation(s)
- Stéphanie Depickère
- Université Libre de Bruxelles, CENOLI, CP 231, Bld du Triomphe, 1050 Bruxelles, Belgium.
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Hefetz A, Soroker V, Dahbi A, Malherbe MC, Fresneau D. The front basitarsal brush in Pachycondyla apicalis and its role in hydrocarbon circulation. CHEMOECOLOGY 2001. [DOI: 10.1007/pl00001827] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Allain P, Alquier P, Fresneau D, Hachet P. [Study of lithium elimination during poisoning with anuria]. Therapie 1973; 28:1135-42. [PMID: 4794733] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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