HAL Portal UPF (Université de la Polynésie française)
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« Je te crois ». Révéler l’inceste, une épreuve professionnelle
No full textInternational audienceCet article interroge les conditions du dévoilement de l’inceste dans le champ social en Polynésie française. Dans quelle mesure les professionnelles du social sont-elles en mesure d’entendre puis de dire l’inceste ? La révélation, qui se matérialise par un signalement, n’est pas un simple énoncé factuel. Elle expose personnellement et professionnellement celle qui veut protéger, mais qui, dans le même temps, est accusée de causer du tort à la famille. Ce mécanisme est renforcé en contexte insulaire. En analysant les dilemmes auxquels sont confrontées les professionnelles du social et leur manière d’y faire face, on met en évidence l’enjeu d’un (ré)outillage conceptuel permettant de penser l’inceste comme un fait social
Drivers of variation in yellow crazy ant ( Anoplolepis gracilipes ) abundance and impacts on native fauna in an atoll ecosystem
No full textInternational audienceAbstract The yellow crazy ant ( Anoplolepis gracilipes ; YCA) is a widespread invader of islands across the Pacific and Indian oceans. This species can negatively affect native fauna and, at high abundances, ecosystem functions. Here we investigated the activity patterns, habitat preferences, and impacts of YCA on a Polynesian atoll (Teti'aroa). We found that YCA activity decreases with increasing substrate temperature, and that YCA favored substrates rich in coarse woody debris and Pisonia grandis trees. By comparing 46 sites varying in YCA abundance (including on non‐invaded islets) we found that ground nesting seabird (brown noddy, Anous stolidus ) presence and abundance decreased with increasing YCA abundance. Terrestrial hermit crab abundance also varied relative to YCA abundance; YCA abundance was negatively correlated with the presence of Coenobita perlatus and positively correlated with the presence of Coenobita rugosus (apparently due to a shared habitat preference for woody debris) and Coenobita brevimanus (potentially due to a shared preference for Pisonia forest). These impacts occurred despite the relatively low abundance of YCA during our surveys. In addition to identifying some drivers of variation in YCA abundance, this study provides an example of how YCA can impact the fauna of atoll islets with ground nesting seabirds. YCA control or eradication measures may be required in order to restore healthy seabird and terrestrial crab populations in this context
Discours de soutenance de thèse. " France libre et Français libres dans les Établissements Français d’Océanie (1940-1947).Une histoire de la résistance des marges dans l’espace Pacifique."
No full textDiscours de soutenance de thèseThis is the presentation I delivered during my public PhD defence on 3 November 2025. My PhD in contemporary history has been conducted under a cotutelle agreement between the Université de la Polynésie Française (UPF, Tahiti, French Polynesia) and Victoria University of Wellington (VUW, New Zealand). My thesis is intitled "France libre et Français libres dans les Établissements Français d’Océanie (1940-1947) Une histoire de la résistance des marges dans l’espace Pacifique". Its preparation was supervised by Véronique Dorbe-Larcade (UPF) and Adrian Muckle (VUW).Discours de soutenance de thèse, prononcé lors de ma soutenance de thèse de doctorat en histoire contemporaine le lundi 3 novembre 2025 à l'Université de la Polynésie Française (UPF). Cette thèse est intitulée "France libre et Français libres dans les Établissements Français d’Océanie (1940-1947) Une histoire de la résistance des marges dans l’espace Pacifique". Elle a été menée dans le cadre d'une cotutelle internationale entre l'UPF et la Victoria University of Wellington (Nouvelle-Zélande) sous la codirection de Véronique Dorbe-Larcade et d'Adrian Muckle. Sa préparation a débuté à la rentrée 2021
AUX FRONTIÈRES DE L'ESPACE MORAL, LA VIOLENCE COMME CHAMP D'EXPÉRIENCES. TÉMOIGNAGES DE DÉTENUS DANS LES PRISONS DE TAHITI AUJOURD'HUI
No full textInternational audienc
Shining a Light on Daytime Coral Spawning Synchrony Across Oceans
No full textInternational audienceAimThe variety of coral taxa and environmental cues triggering broadcast spawning gave rise to contrasting theories about coral reproduction synchrony. Here, we shine a new light on this synchrony across oceans by highlighting how environmental cues modulate spawning time at various spatial scales in an understudied yet abundant gonochoric species. LocationSouth Indian and Pacific Oceans. Time Period2014–2023. Major Taxa StudiedPorites rus . MethodsPorites rus daytime spawning was investigated using a non‐invasive citizen science approach (> 300 voluntary observers) at colony, reef, island and ocean scales. Spawning time was recorded between 2014 and 2023 at a total of 104 reef locations from 15 islands in three countries and multiple depths across the Indian and Pacific Oceans. Statistical models were employed to assess the relationships between spawning time and depth, light and sea surface temperature at different spatial scales, and in both male and female colonies. ResultsSpawning occurred synchronously for colonies located a few meters to > 15,000 km apart, monthly 5 days after full moon over an extended, uninterrupted period from October to April. Strong linear relationships between depth, light, water temperature and spawning time after sunrise held at the different spatial scales for both males and females, which spawned ca. 20 min apart. Interestingly, single colonies spawned across consecutive days and months. Main ConclusionsThe largest data set for a daytime coral species compiled here allows extremely accurate predictions of P. rus spawning months, days and time (minute‐level precision) at different locations and depths in the Southern Hemisphere, facilitating field observations and experiments. Previously underexplored, the highly effective reproductive strategy of P. rus may explain its broad distribution and persistence in stressed environments, positioning it as an invaluable model organism for studying the physiological and genetic processes driving behavioural synchrony and biological rhythms across interconnected biogeographical regions
Le personnage du militant dans la fiction océanienne d’expression française
No full textInternational audiencePolitics cannot be reduced to the role of government: it is also the work of unknown people who engage in collective action to influence the balance of power. A salient feature of French-language literature from the Pacific is the role played by activists, usually indigenous, who fight for their rights and oppose colonial and/or capitalist logic. This is the case, in particular, of Terii in L’Île des rêves écrasés (1991) by Chantal T. Spitz, Rori in Mūtismes (2002) by Titaua Peu, the Tahitian in Le Bambou noir (2005) by Jean-Marc Tera'ituatini Pambrun and Tiapi, Tâdo and Willy in Tâdo, Tâdo wéé ! (2012) by Dewé Gorodé. The ideological convergences are significant in these works, but unlike the Tahitian texts, the anonymous activists, deeply linked to the characters who embody the Kanak resistance, play an essential role, as a collective subject, in Déwé Gorodé’s novel.La politique ne se réduit pas aux rôles des gouvernants : elle est aussi le fait des inconnu·es qui s’engagent dans l’action collective pour peser dans les rapports de force. Un trait saillant de la littérature francophone du Pacifique est précisément le rôle qu’y jouent les personnages du militant ou de la militante, généralement autochtones, qui luttent pour leurs droits et s’opposent à la logique coloniale et/ou capitaliste. C’est le cas, en particulier, de Terii dans L’Île des rêves écrasés (1991) de Chantal T. Spitz, de Rori dans Mūtismes (2002) de Titaua Peu, du Tahitien dans Le Bambou noir (2005) de Jean-Marc Tera'ituatini Pambrun et de Tiapi, Tâdo et Willy dans Tâdo, Tâdo wéé ! (2012) de Dewé Gorodé. Les convergences idéologiques sont importantes dans ces œuvres, mais à la différence des textes tahitiens, les militant·es anonymes, profondément lié·es aux personnages qui incarnent la résistance kanak, jouent un rôle essentiel, en tant que sujet collectif, dans le roman de Déwé Gorodé
Nul besoin d'indiquer précisément à un agent les griefs à l'origine du déclenchement d'une procédure disciplinaire à son encontre s'il a été informé de son droit à obtenir la communication de son dossier
No full textInternational audienceNote sous TA Châlons-en-Champagne, 4 février 2025, no 240003
Légalité d'une révocation pour non-respect de l'interdiction de cumul d'emplois
No full textInternational audienceNote sous CAA Nantes, 28 janvier 2025, no 24NT0215
The metabolome of crustose coralline algae is driven by phylogeny and environmental conditions
No full textInternational audienceMetabolomics is a powerful approach to investigate the effect of environmental conditions on metabolite variations in marine algae. Here, we focused on crustose coralline algae (CCA), a group of calcifying, red algae which play an important role on coral reefs through their interactions with corals and contribution to coral reef formation. Despite their ecological importance, little is known about their metabolome and how it varies with environmental conditions and phylogeny. Using an untargeted metabolomic approach, we explored the metabolomic fingerprints of seven CCA species (order: Corallinales) commonly found on the coral reefs of Moorea, French Polynesia. We developed an extraction method to characterize the CCA metabolome on two sample types (whole fragment and surface only) and explored the chemical variations of CCA across species, reef habitat and microhabitat. The extraction method successfully characterized the CCA metabolome, as demonstrated by a technical variability lower than the biological variability for both sample types. The CCA metabolome was species-specific and a correlation was found between phylogenetic taxonomy and metabolomic profiles of the different species. Moreover, the metabolomic composition of certain species differed between the back and fore reef habitats and between exposed and cryptic microhabitats. These results highlight a high variability in the CCA metabolome mediated by phylogeny and environmental conditions. This study provides valuable insights into the sources of metabolomic variation in CCA. It lays the groundwork for exploring the ecological functions of the CCA metabolome and its potential use as a tool to assess organismal and ecosystem health