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26 resultados encontrados para: AUTOR: Fresneau, Dominique
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1.
- Artículo con arbitraje
*Solicítelo con su bibliotecario/a
Biogeography, cryptic diversity, and queen dimorphism evolution of the Neotropical ant genus Ectatomma Smith, 1958 (Formicidae, Ectatomminae)
Nettel Hernanz, Alejandro ; Lachaud, Jean Paul (coaut.) ; Fresneau, Dominique (coaut.) ; López Muñoz, Román A. (coaut.) ; Poteaux, Chantal (coaut.) ;
Contenido en: Organisms Diversity & Evolution Vol. 15, no. 3 (September 2015), p. 543-553 ISSN: 1439-6092
Nota: Solicítelo con su bibliotecario/a
Resumen en: Inglés |
Resumen en inglés

Due to its high biodiversity and its complex climatic and geological history, the Neotropical region has caught the attention of evolutionary and conservation biologists. The Neotropics have an understudied and probably extensive cryptic diversity, stemming from old lineages that have persisted through time with highly similar morphology or from new morphologically undifferentiated sibling species. The wide-ranging Neotropical ant genus Ectatomma currently has only 15 described species, some of which present limited distribution. These ants provide an excellent system for the study of diversification and cryptic diversity in the Neotropics. Ectatomma also displays queen-size dimorphism in some northern populations of its two most common species: a case of true microgyny and a recently described parasitic species. We performed a phylogenetic and biogeographic analysis of Ectatomma species using two mitochondrial genes and one nuclear gene. We also explored the relationship between the history of the genus and the appearance of miniaturized queens. Our analysis recovered a monophyletic Ectatomma that originated in the Parana region of South America. We recorded three likely events of colonization of the Caribbean–Mesoamerican region. We also detected ample evidence of cryptic divergence that deserves a full taxonomic revision of the genus. Miniature queens—microgynes and parasites—represent two independent evolutionary events that appeared in the recent history of the genus.


2.
Artículo
The role of microgynes in the reproductive strategy of the neotropical ant Ectatomma ruidum
Lenoir, J. C. ; Lachaud, Jean Paul (coaut.) ; Nettel, A. (coaut.) ; Fresneau, Dominique (coaut.) ; Poteaux, C. (coaut.) ;
Contenido en: Naturwissenschaften Vol. 98, no. 4 (Apr. 2011), p. 347-56 ISSN: 0028-1042
PDF
Resumen en: Inglés |
Resumen en inglés

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.


3.
Capítulo de libro
Les mécanismes auto-organisationnels dans la coopération et la prise de décision collective
Lachaud, Jean Paul (coaut.) ; Beugnon, Guy (coaut.) ; Deneubourg, Jean Louis (coaut.) ; Goss, Simon (coaut.) ;
Clasificación: AR/595.70524 / L3/1
Contenido en: Systèmes Coopératifs: de la Modélisation à la Conception. Octares Octarès Éditions, 1994 p. 155-173 ISBN:2-906769-18-5
Bibliotecas: San Cristóbal , Tapachula
Cerrar
SIBE San Cristóbal
ECO010019655 (Disponible)
Disponibles para prestamo: 1
Cerrar
SIBE Tapachula
ECO020010045 (Disponible)
Disponibles para prestamo: 1

4.
Capítulo de libro
Bioecología de pachycondyla apicalis en El Soconusco, Chiapas, México
Valenzuela González, Jorge Ernesto ; Fresneau, Dominique (coaut.) ;
Clasificación: S/595.799045 / V31
Contenido en: Simposio de Insectos Sociales (2 : 1989 : Oaxtepec, Morelos)
Bibliotecas: San Cristóbal
Cerrar
SIBE San Cristóbal
SER000327 (Disponible)
Disponibles para prestamo: 1

5.
Artículo
Individual foraging in the ant pachycondyla apicalis
Valenzuela González, Jorge Ernesto ; Fresneau, Dominique (coaut.) ; Lachaud, Jean Paul (coaut.) ;
Clasificación: AR/595.796045 / V3
Contenido en: Oecología Vol. 80, no. 1 (1989), p. 65-69
Bibliotecas: San Cristóbal , Tapachula
Cerrar
SIBE San Cristóbal
SER000099 (Disponible) , SER000098 (Disponible)
Disponibles para prestamo: 2
Cerrar
SIBE Tapachula
ECO020010086 (Disponible)
Disponibles para prestamo: 1
Resumen en: Inglés |
Resumen en inglés

A model of individual foraging in social insects is presented that formalises the dynamics of foraging and concentrates on the collective rather than the individual benefit, quantifying the relationship between a colony's foraging area, number of foragers and foraging energy budget and the food sources' rate of arrival, disappearanceand capture. A series of experiments, in which a numberof prey were offered to colonies of the individually foraging ant Pachycondyla (ex-Neoponera) apicalis confirm the hypotheses implicit in the model and measured the rates of capture and competition. 60 days observation of 3 P. apicalis colonies' foraging activity are summarised and used inconjunction with the model to obtain estimations of the density and rate of arrival of available prey in the foraging area. We examine how a colony's foraging benefit may be influenced by its foraging area, the number of foragers, and the forager/non-forager ratio and show that a colony's social structure strongly limits its potential foraging benefit. Within these limits, P. apicalis does not appear to be an optimal forager. (Abstract provided by author.)


6.
Capítulo de libro
Donnees preliminaires sur les premiers stades du developpement de la société chez ectatomma ruidum (hymenoptera, formicidae)
Corbara, Bruno ; Fresneau, Dominique (coaut.) ; Lachaud, Jean Paul (coaut.) ;
Clasificación: S/595.799045 / C6
Contenido en: Congress National Society San. (3er. : 1986 : Politiers, Francia) p. 1-10
Bibliotecas: San Cristóbal
Cerrar
SIBE San Cristóbal
SER000384 (Disponible)
Disponibles para prestamo: 1

7.
Artículo
*En hemeroteca, SIBE-San Cristóbal, SIBE-Tapachula
La división del trabajo en la hormiga primitiva Neoponera villosa (Hymenoptera: formicidae)
Pérez Bautista, Miguel ; Lachaud, Jean Paul (coaut.) ; Fresneau, Dominique (coaut.) ;
Clasificación: AR/595.796 / P4
Contenido en: Folia Entomológica Mexicana No. 65 (1985), p. 119-130 ISSN: 0430-8603
Bibliotecas: Campeche , San Cristóbal , Tapachula
Cerrar
SIBE Campeche
ECO040001258 (Disponible)
Disponibles para prestamo: 1
Cerrar
SIBE San Cristóbal
B5664 (Disponible) , SER000203 (Disponible) , SER000202 (Disponible)
Disponibles para prestamo: 3
Cerrar
SIBE Tapachula
18835-70 (Disponible)
Disponibles para prestamo: 1
Nota: En hemeroteca, SIBE-San Cristóbal, SIBE-Tapachula

8.
Artículo
Individual foraging and path fidelity in a ponerine ant
Fresneau, Dominique ;
Clasificación: AR/595.796045 / F77
Contenido en: Insectes Sociaux Vol. 32, no. 2 (1985), p. 109-116
Bibliotecas: San Cristóbal
Cerrar
SIBE San Cristóbal
SER000113 (Disponible)
Disponibles para prestamo: 1
Resumen en: Inglés | Frances |
Resumen en inglés

An investigation of field foraging in colonies of Neoponera apicalis is reported. We observed that workers develope an individualized foraging strategy with a high degree of regional specialization that persists for extended periods. The use of visual cues seems to constitute the basis for the spatial orientation. No recruitment was never observed during foraging as in other Ponerine ants, tandem running was only seen during a natural translocation of a colony. These observations reveal a primitive and original food-supply strategy in ants.

Resumen en frances

Trois colonies de Neoponera apicalis ont été observées lors d'une étude en nature. Dans cette espèce, chaque ouvrière pourvoyeuse prospecte et chasse solitaïrement dans un site individualisé pour lequel elle se spécialise sur de longues périodes. L'orientation des fourrageuses semble probablement reposer sur l'utilisation d'un repérage visuel. Durant le fourragement, il n'est jamais fait usage de processus de recrutement comme on l'observe chez d'autres Ponérines. Le «tandem running» a été observé seulement lors du déménagement spontané d'une colonie. Ceci révèle, à notre avis, une stratégie d'approvisionnement originale et primitive chez les fourmis.


9.
Capítulo de libro
La regulation sociale: donnees preliminaires sur les facteurs individuals controlant l'organisation des taches chez neoponera apicalis (hym. formicidae, ponerinae)
Fresneau, Dominique ; Lachaud, Jean Paul (coaut.) ;
Clasificación: AR/595.796045 / F74
Contenido en: Actes des colloques Insectes Sociaux no. 2 (1985), p. 185-193
Bibliotecas: San Cristóbal , Tapachula
Cerrar
SIBE San Cristóbal
SER000594 (Disponible)
Disponibles para prestamo: 1
Cerrar
SIBE Tapachula
ECO020010226 (Disponible)
Disponibles para prestamo: 1

10.
Capítulo de libro
A study of polyethism in a ponerine ant: heoponera apicalis (BYM., formicidan)
Fresneau, Dominique ; Dupuy, P. ;
Clasificación: AR/595.796045 / F7
Contenido en: no. 32 (1985)
Bibliotecas: San Cristóbal
Cerrar
SIBE San Cristóbal
SER000204 (Disponible)
Disponibles para prestamo: 1
Resumen en: Inglés |
Resumen en inglés

The division of labour in a colony of Neoponera apicalis Latr. was studied, observations being made over a period of 21 days during which each member of the society was individually monitored. Processing the results by correlation analysis made it possible to establish the relationships between the various behavioural patterns observed. These were organized around three focal activities: care of the brood, non-specific activities in the nest and foraging. The division of ants into these three categories was relatively consistent. The social status of individual ants was determined by cluster analysis. This revealed the existence of two further subgroups: domestic workers and pre-foragers. The age of individuals is a probable factor governing the division of labour. This organization is consistent with that observed in higher species. However, the participation ofwinged females, and probably queens, in various tasks on the same basis as the workers may be considered a primitive trait characteristic of species of ponerine ants.