Publications ENTROPIE IRD

Deep-sea demersal fisheries in the Pacific have strong commercial, cultural, and recreational value, especially snappers (Lutjanidae) which make the bulk of catches. Yet, managing these fisheries is challenging due to the scarcity of data. Stereo-Baited R…

New Caledonia is currently seeking its future institutional framework through violent, politically-driven clashes within the population. The insurrections in May 2024, fuelled by political, and social divisions, also targeted the healthcare system in an u…

Among procellariids, the Tahiti Petrel Pseudobulweria rostrata is one of the most endangered and least known species. Its global populations are declining, yet demographic and ecological studies remain scarce. Understanding the breeding cycle and behavior…

The swift decline of coral reefs stands out as a significant biodiversity challenge confronting our generation, and mesophotic coral ecosystems (MCEs; reefs between 30 and 150 m) have been proposed as refuge habitats that may be less affected by climate c…

The semienclosed Bourake lagoon in New Caledonia is a natural system that enables observation of evolution in action with respect to stress tolerance in marine organisms, a topic directly relevant to understanding the consequences of global climate change…

The marine microbiome arouses an increasing interest, aimed at better understanding coral reef biodiversity, coral resilience, and identifying bioindicators of ecosystem health. The present study is a microbiome mining of three environmentally contrasted …

Predatory and large-bodied coral reef fishes have fundamental roles in the functioning and biodiversity of coral reef ecosystems, but their populations are declining, largely due to overexploitation in fisheries. These fishes include sharks, groupers, Hum…

Prey abundance and quality are dynamic in time and space, impacting predator ecology. We examine variation in species-specific krill quantity and quality as prey for humpback whales in the Northern California Current region, using generalized additive mod…

The susceptibility of species to habitat changes depends on which ecological drivers shape individual fitness components. To date, only a few studies have quantified fitness components such as the Lifetime Reproductive Success across multiple generations …

Geographical barriers and sea-level fluctuations have significantly influenced the population genetic structure and evolutionary history of Indo-West Pacific (IWP) reef species. This study examines these effects in Abudefduf septemfasciatus (banded sergea…

Coastal ecosystems in Pacific Island Countries and Territories are vital to local livelihoods, yet increasingly face pressures from urbanization. In Fiji, the Greater Suva Urban Area, where one-third of the nation's population live, exemplifies these chal…

Les données de capture à la palangre de surface lors des campagnes de capture et d'élimination des requins responsables d'attaques sur des humains dans le lagon de la Nouvelle-Calédonie (2016-2023) ont été utilisées pour caractériser la diversité des gra…

L'objectif du présent travail est l'estimation de la taille de la colonie de puffins du Pacifique Ardenna pacifica de la péninsule de Pindaï sur la côte ouest de la Grande Terre de la Nouvelle-Calédonie (mer de Corail), à partir de douze opérations de r…

Island ecosystems, characterized by isolation and vulnerability, are subject to natural and human-induced pressures. Rapid and effective biodiversity monitoring is crucial for tracking these impacts and adapting conservation efforts. This study focuses on…

BackgroundIn the context of global change, coral reefs and their associated biodiversity are under threat. Several conservation strategies using population genetics have been explored to protect them. However, some components of this ecosystem are underst…

This study aims to identify the petrel species affected by artificial light pollution in New Caledonia, describe the spatial and temporal patterns of light-induced groundings, and infer the factors involved. The study took place across Grande Terre (New C…

Mesophotic coral ecosystems (MCEs) have gained considerable attention this last decade but the paucity of knowledge on these ecosystems is pronounced, particularly in the Southwestern Indian Ocean region. We explore the spatial variation in macro-benthic …

Variation in reproductive success is a fundamental prerequisite for sexual selection to act upon a trait. Assessing such variation is crucial in understanding a species' mating system and offers insights into population growth. Parentage analyses in cetac…

AimIt has been hypothesised that niche breadth decreases with richness due to interactions, such as competition, forcing species to specialise. This hypothesis has been tested at the community-level using species-level niche breadth estimates. However, ev…

Porites corals are vital components of tropical reef ecosystems worldwide, serving as ecosystem engineers and hubs of biodiversity in shallow water coral reefs. Despite their ecological significance and the widespread use of Porites spp. as models for res…

Euphausiids (krill) are globally significant zooplankton prey for many commercially important or endangered predator species. In the productive upwelling system of the Northern California Current (NCC), two krill species, Euphausia pacifica and Thysanoess…

Reunion Island is in the South-West Indian Ocean (SWIO), where all freshwater fish species are diadromous. The ecological status assessments of freshwater in watersheds have revealed a continuing deterioration in these fish populations due to anthropic pr…

Micronekton are the mid-trophic level of the ecosystem and contribute to active carbon export to the deep ocean through diel vertical migrations. Better characterization of micronekton functional groups depending on relationships to environmental variable…

The regular and consistent monitoring of marine ecosystems and fish communities is becoming more and more crucial due to increasing human pressures. To this end, underwater camera technology has become a major tool to collect an important amount of marine…

The Southwest Pacific region is of great importance to global climate variability, but instrumental climate observations before the 1980s lack in numbers and quality. Despite efforts in complementing instrumental records with proxy sea surface temperature…

Crustose coralline algae (CCA) play a critical role in the ecology and resilience of coral reefs by contributing to reef carbonate production and facilitating coral recruitment. However, little is known about their rates of in situ growth and calcificati…

One crucial interaction for the health of fish communities in coral reefs is performed by cleaner fish by removing ectoparasites from the body of other fish, so-called clients. Studying the underlying mechanisms of this behaviour is essential to understan…

The amount of ocean protected from fishing and other human impacts has often been used as a metric of conservation progress. However, protection efforts have highly variable outcomes that depend on local conditions, which makes it difficult to quantify wh…