The Minimum Conservation Reference Size (MCRS) for marine resources ensure that individuals can mature and reproduce at least once before being caught. For management purposes, MCRS should be revised for specific populations in given areas. In Arcachon Bay (southwest France), fishers have repeatedly requested a review of the MCRS for R. philippinarum. In 2020, a joint recommendation, supported by France, was addressed to the European Commission s [...]
The Saya de Malha bank found in the Western Indian Ocean is known as a key biodiversity area with high productivity. In-situ data, however, is characterised by paucity, therefore the Indian Ocean 2022 mission of the Monaco Explorations provided an opportunity to assess the productivity and investigate the major drivers of the phytoplankton community across this bank. The main findings on phytoplankton indicated a well-mixed water column across th [...]
The pressure that fishing exerts on marine ecosystems is of increasing concern worldwide. When deployed in compliance with appropriate technical regulations, the use of passive baited gear such as traps is a selective and low-impact fishing technique that can contribute to the sustainable exploitation of marine resources. In the case of traps or lines, the choice of bait might further increase the selectivity of the gear, particularly when the de [...]
Understanding the spatial ecology of sea turtles is essential to ensure their long-term conservation by the preservation of their environment. The distribution and environmental preferences for egg-laying by the green turtle (Chelonia mydas) were studied on Grande Saziley beach in Mayotte (north of the Mozambique Channel). Green turtle nesting activity was geolocated during night patrols and the depth of specific nests was measured during two fie [...]
This article presents experimental measurements of breaking wave impact loads on a vertical cylinder. The focus is on the influence of some of the breaking wave properties on the measured force. These properties are the distance to breaking, δ, defined as the distance between the breaking location and the front face of the cylinder, and the breaking strength, characterised here by the Γ parameter proposed by Derakhti et al. (2018). The wave [...]
The Surface Ocean-Lower Atmosphere Study (SOLAS) is a global research network dedicated to advancing coupled oceanographic and atmospheric science, a field that requires both interdisciplinary and globally distributed expertise. Since 2004, SOLAS has fostered an international interdisciplinary scientific community through coordinated science and capacity sharing activities. This paper outlines how SOLAS 3.0 (2026–2035) will build on this legacy b [...]
Malgré leur importance écologique et les services écosystémiques essentiels qu'ils offrent, les récifs coralliens sont menacés comme jamais auparavant par le changement climatique et les pressions humaines. L'importance socio-économique de ces écosystèmes doit être analysée en accordant une attention particulière à leur rôle dans la pêche, le tourisme, la protection côtière et le patrimoine culturel. Des études de cas, comme les récifs coralliens [...]
Mesoscale eddies play a crucial role in ocean dynamics, yet their impact on vertical heat fluxes over topographic features remains poorly understood. This study investigates the Iceland-Faroe Ridge (IFR), a key boundary between the North Atlantic and Nordic Seas, southeast of Iceland. Recent rapid warming in the region has shifted thermal structures, potentially impacting the upper cell of the global thermohaline circulation. Using newly availabl [...]
he southern South China Sea is located at the edge of the Western Pacific Warm Pool and plays a crucial role in the interaction of the Asian winter and summer monsoons. Understanding the evolution of the upper water structure during glacial-interglacial cycles is essential for investigating the East Asian monsoon and tropical ocean-atmosphere coupling processes. This study is based on sediment samples from the MD01-2392 core(43.3 m, 09° 51.13' N, [...]
Infrared (IR) light is widely accepted as a non‐intrusive lighting for discreet observation but relevant studies are scarce. The response of European seabass Dicentrarchus labrax (Linnaeus 1758) towards IR light was tested during laboratory experiments alternating sequences of IR light and dark conditions. Swimming trajectories were extracted from hydroacoustic videos and behavioural metrics (e.g. speed, bearings) were quantified from the D. labr [...]
The genus Conasprella Thiele, 1929 is the second largest in the family Conidae. It encompasses 161 described species that mainly occur at bathyal depths. Despite this relatively high species diversity, species delimitation and taxonomy of the genus have barely been addressed with molecular data. In the present study, we revisit species delimitation in the Indo-Pacific Conasprella orbignyi complex based on data from a previous study and substantia [...]
In the past decade, the Sentinel-1 (S1) mission has proven to be invaluable for monitoring tropical cyclones (TCs) and conducting associated research. C-band S1 dual-polarization Synthetic Aperture Radar (SAR) have been instrumental in refining wind retrieval algorithms, especially for major category TCs. Systematic comparisons with airborne multi-frequency radiometer measurements confirm the unique ability of SAR to provide synoptic high-resolut [...]
Discard survival in commercial fisheries is key in fisheries management policies but challenging to estimate. Pooling information from multiple studies can improve the estimation of survival rate at regional scale and the identification of key drivers. Here, we present a meta-regression (MR) framework that considers differences in experimental design, quality and context specificity between individual studies to produce reliable inferences.First, [...]
Par leur situation géographique le long des côtes, les récifs coralliens forment une barrière naturelle vivante atténuant l’énergie des vagues entrantes, protégeant les écosystèmes côtiers et les populations humaines des risques de submersion, d'inondation et d’érosion. Ces récifs font face à des pressions et perturbations croissantes, conduisant à des épisodes de mortalités des coraux qui les constituent et à une dégradation de leur état à l’éch [...]
The Leeuwin Current(LC) as the main route for the poleward transport of warm and low-salinity waters from eastern Indian Ocean regulates heat and salinity distributions among high-and low-latitude seas and precipitation over the west coast of Australia. Deciphering changes of the LC strength and the influencing factors in the past thus is important for understanding the regional and global climate change. In this study, the upper 63 cm sediments [...]
The "monsoon-type" oxygen isotope(δ18O) curve of planktonic foraminifera from the South China Sea(SCS) serves as a typical representation of low-latitude hydrological cycle evolution on orbital scales. However, this record is hard to interpret due to the inclusion of multiple climatic signals. Here we present 169 kyrs' high resolution records of G.ruber δ18O and Mg/Ca from core MD05-2896/97 in the southern SCS(latitude: 08° 49.05' N/08° 49.53' N, [...]
The carbon cycle within the upper water column of the South China Sea exhibits distinct seasonal fluctuations, closely associated with upper ocean mixing driven by the monsoon. However, the response of stable carbon isotopes(δ13C) of surface ocean dissolved inorganic carbon to the variations in ocean mixing on the seasonal scale, remains poorly understood due to the limited observational data and reconstructions. Analysis of published planktic fo [...]
Cette procédure a pour objet de décrire la stratégie d’échantillonnage des lieux de surveillance du REPHY Sanitaire et du REPHYTOX en région Nouvelle Aquitaine. Elle est produite par le Laboratoire Environnement & Ressources des pertuis Charentais (LER/PC), et référencée dans son système documentaire. Elle est validée par la coordination des réseaux REPHY-REPHYTOX et par les DDI de Charente-Maritime et de Vendée qui pilote le dispositif REPHYTOX [...]
Overfishing and climate change are primary drivers of shifts in fish and fisheries dynamics, though additional factors contribute significantly to their vulnerability. Recent disruptions, such as the COVID-19 pandemic and fuel crises, have exacerbated pressures on the fishing sector, while the emergence of invasive species necessitates adaptive responses across the value chain.Increasingly complex models and scenarios are being developed to captu [...]
Ce rapport, mis à jour annuellement, détaille la composition des débarquements français hexagonaux (en poids, mais aussi en nombre de populations exploitées) capturés dans le Nord-Est Atlantique et la Méditerranée par espèce et unité géographique (« stock halieutique »), en fonction de leur statut au regard de l'objectif du rendement maximal durable (RMD). Cela représente ainsi un bilan de l’interaction entre ces ressources et leur exploitation. [...]
