Romane Blaya, Olivier Blight, Sébastien Aurelle, Julie Braschi, Laurence Berville, et al.. Mixed responses of ant communities to the eradication of black rats and iceplants on a small Mediterranean island. Biodiversity and Conservation, 2024, ⟨10.1007/s10531-024-02838-5⟩. ⟨hal-04560438⟩
Quick, I want to have the colonial odour: Rapid acquisition of the chemical signature in the invasive hornet Vespa velutina nigrithorax. Poster : Haouzi Mélissa, Cheng Yanan, Berville Laurence, Lucas Christophe, Tan Ken, Darrouzet Eric. https://wp.unil.ch/iussi-europe-2024/
Blaya R, Blight O, Aurelle S, Braschi J, Berville L, Ponel P & E Buisson (2024) Mixed responses of ant communities to the eradication of black rats and iceplants on a small Mediterranean island, Accepted in Biodiversity and Conservation.
Callows have their own odour but not for long: Fast acquisition of the chemical signature in the yellow-legged hornet, Vespa velutina nigrithorax In eusocial insects, the discrimination between conspecifics and intruders is essential for the functioning of most insect societies. This capacity mediated by pheromones, and in particular by Cuticular Hydrocarbon Compounds (CHCs) is the main mechanism of social nestmate recognition which can include heritable cues, as well as acquired cues from nestmates and/or their environment. In this study, we analysed the acquisition of the chemical signature of callows over time, compared to nestmate workers and their nest materials in the invasive hornet Vespa velutina nigrithorax. We show that callows present their own chemical signature, different from both the oldest individuals and nest materials. Interestingly, this chemical signature evolves rapidly, the first two days after emergence, and is not influenced by the presence of a chemical template (workers and/or nests) in laboratory conditions. Moreover, quantities of branched alkanes increased with age. All these results suggest that the chemical signature in V. velutina nigrithorax is probably more influenced by some parameters like physiological processes or genetic factors.
Chemotaxonomy of Tapinoma and some Dolichoderinae Ants from Europe and North Africa. https://doi.org/10.13102/sociobiology.v70i3.9099
Cuticular hydrocarbons of some Dolichoderinae species from France and various places like Spain, North Africa, and Italy were studied. The Tapinoma nigerrimum group was particularly analyzed and replaced in the genus Tapinoma. All species were correctly discriminated and a new hydrocarbons profile was found in Spanish mountains in the T. nigerrimum group, which was provisionally named T. sp. Spain. We added numerous unknown spots for the distribution of these ants. We also tested aggression between some T. magnum colonies and it appeared that this species forms supercolonies like other invasive species, but does not form giant supercolonies like the Argentine ant. ------------------------------------------------------------------------------------------------------ Les hydrocarbures cuticulaires de certaines espèces de Dolichoderinae de France et d'autres régions telles que l'Espagne, l'Afrique du Nord et l'Italie ont été étudiés. Le groupe Tapinoma nigerrimum a été particulièrement analysé et réintégré dans le genre Tapinoma. Toutes les espèces ont été correctement discriminées et un nouveau profil d'hydrocarbures a été découvert dans les montagnes espagnoles au sein du groupe T. nigerrimum, provisoirement nommé T. sp. Spain. Nous avons ajouté de nombreux sites inconnus pour la distribution de ces fourmis. Nous avons également testé l'agressivité entre certaines colonies de T. magnum et il est apparu que cette espèce forme des supercolonies, comme d'autres espèces invasives, mais ne forme pas de supercolonies géantes comme la fourmi argentine. Keywords: Chemosystematics, cuticular hydrocarbons, invasive ants, Tapinoma, Dolichoderus, Linepithema, Bothriomyrmex Chemical profiles of venom glands in queens, foundresses, pre-wintering gynes, and workers in the hornet Vespa velutina nigrithorax
[Profils chimiques des glandes à venin chez les reines, les fondatrices, les gynes pré-hivernantes et les ouvrières du frelon Vespa velutina nigrithorax] Laurence Berville ; Christophe Lucas ; Mélissa Haouzi ; Ali Khalil ; Jérémy Gévar ; Anne-Geneviève Bagnères ; Eric Darrouzet Comptes Rendus. Chimie, Online first (2023), pp. 1-16. https://comptes-rendus.academie-sciences.fr/chimie/articles/10.5802/crchim.228/#article-div I am excited to share details about my ongoing research project in Granada, Spain, which delves into the fascinating interactions between aphids and ants.
**Research Focus:** Our study investigates the role of cuticular hydrocarbons in the mutualistic relationship between aphids and ants. Ants often mark aphids with their specific hydrocarbons, which influence how they are perceived within their community. Aphids that produce more honeydew are marked more extensively, which affects their protection level by ants and their susceptibility to predation. **Laboratory Experiments:** Our project includes two key laboratory experiments focused on analyzing and identifying the cuticular hydrocarbons of aphids. **Collaborative Efforts:** This research is conducted in collaboration with Dr. Christophe Lucas and Dr. Elfie Perdreau (IRBI – CNRS) and Dr. Francisca Ruano (Universidad de Granada). Our goal is to leverage these insights to develop innovative and environmentally friendly pest control strategies. Stay tuned for more updates as we advance our understanding of these complex ecological interactions!
Lenoir, A., J.-L. Mercier, E. Perdereau, L. Berville & C. Galkowski (2022). Sur l’expansion des fourmis envahissantes du genre Tapinoma en France (Hymenoptera : Formicidae). Osmia, 11: 1–10. https://doi.org/10.47446/OSMIA11.1
Depuis de nombreuses années maintenant, l'IRBI (Institut de Recherche sur la Biologie de l'Insecte), étudie le frelon asiatique et tente de mettre au point un piège sélectif afin d'en limiter les populations. Ce piège pourrait être posé notamment dans les endroits où la présence du frelon est la plus problématique comme à proximité des ruches.
Des chercheurs de l’Université de Tours ont besoin de frelons asiatiques pour poursuivre leurs travaux. Ils se proposent de collecter les nids directement chez vous. Il est 9 h 20, jeudi 4 août 2022. .... Lutte contre les fourmis invasives : la Ville de Saumur va aider financièrement les riverains5/4/2022
Chercheur à l’institut de recherche sur la biologie de l’insecte, Jean-Luc Mercier explique les mécanismes qui ont amené la Tapinoma magnum, une espèce de fourmis méditerranéennes, à coloniser l’un des quartiers de la ville de Saumur dans le Maine-et-Loire.
https://www.ouest-france.fr/pays-de-la-loire/saumur-49400/saumur-fourmis-invasives-elles-peuvent-prosperer-si-elles-ne-connaissent-pas-de-resistance-358b5222-b437-11ec-9a24-5bd00f9afaef Une solution sélective a été mise au jour pour piéger le frelon asiatique. Le Département de la Manche a financé les recherches de cette découverte.
actu.fr/societe/une-methode-innovante-pour-pieger-les-frelons-asiatiques-testee-dans-la-manche_48838329.html |
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