A5001946383- Identification and Quantification in Food
- Environmental DNA in Biodiversity Studies
- Microbial Community Ecology and Physiology
- Ichthyology and Marine Biology
- Coral and Marine Ecosystems Studies
- Marine animal studies overview
- Marine and fisheries research
- Fish Ecology and Management Studies
- Marine Ecology and Invasive Species
- Genomics and Phylogenetic Studies
- Fish Biology and Ecology Studies
- Marine and Coastal Ecosystems
- Isotope Analysis in Ecology
- Marine Bivalve and Aquaculture Studies
- Educational Tools and Methods
- Aquatic life and conservation
- International Maritime Law Issues
- Turtle Biology and Conservation
- French Urban and Social Studies
- Pacific and Southeast Asian Studies
- Medical Imaging and Pathology Studies
Ifremer
2018-2024
Marine Biodiversity Exploitation and Conservation
2015-2024
Université de Montpellier
2015-2024
Institut de Recherche pour le Développement
2015-2024
Centre National de la Recherche Scientifique
2018-2024
Centre d'Écologie Fonctionnelle et Évolutive
2021
Institut National de l'Énergie Solaire
2021
Zoological Society of London
2021
Instituto Nacional de Biodiversidad
2021
Institut de Recherche pour le Développement
2018-2019
Environmental DNA reveals unsuspected shark diversity and calls for monitoring protection of residual populations.
Abstract Environmental DNA (eDNA) analysis is a revolutionary method to monitor marine biodiversity from animal traces. Examining the capacity of eDNA provide accurate measures in species‐rich ecosystems such as coral reefs prerequisite for their application long‐term monitoring. Here, we surveyed two Colombian tropical reefs, island Providencia and Gayraca Bay near Santa Marta, using underwater visual census (UVC) methods. We collected large quantity surface water (30 L per filter) above...
Abstract Aim Environmental DNA metabarcoding has recently emerged as a non‐invasive tool for aquatic biodiversity inventories, frequently surpassing traditional methods detecting wide range of taxa in most habitats. The major limitation currently impairing the large‐scale application eDNA‐based inventories is lack species sequences available public genetic databases. Unfortunately, these gaps are still unknown spatially and taxonomically, hindering targeted future sequencing efforts....
Since the 1950s, industrial fisheries have expanded globally, as fishing vessels are required to travel further afield for opportunities. Technological advancements and fishery subsidies granted ever-increasing access populations of sharks, tunas, billfishes, other predators. Wilderness refuges, defined here areas beyond detectable range human influence, therefore increasingly rare. In order achieve marine resources sustainability, large no-take protected (MPAs) with pelagic components being...
Increasing speed and magnitude of global change threaten the world's biodiversity particularly coral reef fishes. A better understanding large-scale patterns processes on reefs is essential to prevent fish decline but it requires new monitoring approaches. Here, we use environmental DNA metabarcoding reconstruct well-known uncover hidden these highly diverse threatened ecosystems. We analysed 226 (eDNA) seawater samples from 100 stations in five tropical regions (Caribbean, Central Southwest...
Although we are currently experiencing worldwide biodiversity loss, local species richness does not always decline under anthropogenic pressure. This conservation paradox may also apply in protected areas but has yet received conclusive evidence marine ecosystems. Here, survey fish assemblages six Mediterranean no-take reserves and their adjacent fishing grounds using environmental DNA (eDNA) while controlling for conditions. We detect less than nearby fished areas. The paradoxical gradient...
Abstract Quantifying fish species diversity in rich tropical marine environments remains challenging. Environmental DNA (eDNA) metabarcoding is a promising tool to face this challenge through the filtering, amplification, and sequencing of traces from water samples. However, because eDNA concentration low environments, reliability detect can be limited. Using an approach identify Molecular Taxonomic Units (MOTUs) with single 12S marker, we aimed assess how number sampling replicates filtered...
Assessing the impact of global changes and protection effectiveness is a key step in monitoring marine fishes. Most traditional census methods are demanding or destructive. Nondisturbing nonlethal approaches based on video environmental DNA alternatives to underwater visual fishing. However, their ability detect multiple biodiversity factors beyond taxonomic diversity still unknown. For bony fishes elasmobranchs, we compared performance eDNA metabarcoding long-term remote assess species'...
Abstract Reef sharks are declining world‐wide under ever‐increasing fishing pressure, with potential consequences on ecosystem functioning. Marine protected areas ( MPA s) currently one of the management tools used to counteract pervasive impacts fishing. However, s in which reef abundant tend be located remote and underexploited areas, preventing a fair assessment effectiveness beyond remoteness from human activities. Here, we determine conditions can effectively protect along wide gradient...
Environmental DNA (eDNA) has the potential to provide more comprehensive biodiversity assessments, particularly for vertebrates in species-rich regions. However, this method requires completeness of a reference database (i.e. list sequences attached each species), which is not currently achieved many taxa and ecosystems. As an alternative, range operational taxonomic units (OTUs) can be extracted from eDNA metabarcoding. extent diversity OTUs provided by limited sampling effort predict...
Abstract Estuaries are characterized by a tidal regime and strongly influenced hydrodynamics host diverse highly dynamic habitats, from fresh, brackish, or saltwater to terrestrial, whose biodiversity is especially difficult monitor. Here, we investigated the potential of environmental DNA (eDNA) metabarcoding, with three primer sets targeting different regions mitochondrial 12S ribosomal RNA gene, detect vertebrate diversity in estuary Don Diego River Colombia. With eDNA, detected not only...
Abstract Aim Coastal fishes have a fundamental role in marine ecosystem functioning and contributions to people, but face increasing threats due climate change, habitat degradation overexploitation. The extent which human pressures are impacting coastal fish biodiversity comparison with geographic environmental factors at large spatial scale is still under scrutiny. Here, we took advantage of DNA (eDNA) metabarcoding investigate the relationship between biodiversity, including taxonomic...
Animal body-size variation influences multiple processes in marine ecosystems, but habitat heterogeneity has prevented a comprehensive assessment of size across pelagic (midwater) and benthic (seabed) systems along anthropic gradients. In this work, we derive fish indicators from 17,411 stereo baited-video deployments to test for differences between responses remoteness human pressures effectiveness protected areas (MPAs). From records 823,849 individual fish, report divergent systems, with...
Abstract Monitoring large marine mammals is challenging due to their low abundances in general, an ability move over distances and wide geographical range sizes. The distribution of the pygmy ( Kogia breviceps ) dwarf sima sperm whales informed by relatively rare sightings, which does not permit accurate estimates ranges. Hence, conservation status has long remained Data Deficient (DD) Red list International Union for Conservation Nature (IUCN), prevent appropriate measures. Environmental...
Abstract Reef sharks are vulnerable predators experiencing severe population declines mainly due to overexploitation. However, beyond direct exploitation, human activities can produce indirect or sub-lethal effects such as behavioral alterations. Such alterations well known for terrestrial fauna but poorly documented marine species. Using an extensive sampling of 367 stereo baited underwater videos systems, we show modifications in grey reef shark ( Carcharhinus amblyrhynchos ) occurrence...
In a context of marine biodiversity erosion, the need to better understand effects overfishing stands out. New genetic techniques such as environmental DNA (eDNA) metabarcoding have emerged and allow detection wider range species compared conventional methods, but still fall short providing reliable abundance estimations subsequent ecological indicators. this paper, we propose combination quantitative polymerase chain reaction obtain quantity eDNA molecules per species. This method was used...
Islands have been used as model systems to study ecological and evolutionary processes, they provide an ideal set-up for validating new biodiversity monitoring methods. The application of environmental DNA metabarcoding marine requires understanding the spatial scale eDNA signal, which is best tested in island systems. Here, we investigated variation Actinopterygii Elasmobranchii species composition recovered from along a gradient distance-to-reef four five French Scattered Western Indian...
Abstract Mesophotic marine ecosystems are characterized by lower light penetration supporting specialized fish fauna. Due to their depths (−30–−150 m), accessibility is challenging, and the structure of mesophotic assemblages generally less known than either shallow reefs or deep zones with soft bottoms which trawled. Environmental DNA metabarcoding from seawater filtered in situ could improve our ability monitor diversity ecosystems. Here, we developed tested a submersible standalone...
Species inventories are the building blocks of our assessment biodiversity patterns and human impact. Yet, historical based on visual observations often incomplete, impairing subsequent analyses ecological mechanisms, extinction risk management success. Environmental DNA (eDNA) metabarcoding is an emerging tool that can provide wider assessments than classical visual‐based surveys. However, eDNA‐based remain limited by sampling effort reference database incompleteness. In this study, we...
ABSTRACT Aim The Mediterranean Sea is one of the most anthropized seas in world but also a marine biodiversity hotspot with many fish species under threat. main goal study to test whether on heavily fished and coast, less impacted Corsica Balearic Islands, can be considered as refugia for threatened elasmobranch fishes independently protection by reserves. Location French coast three north‐western islands: Mallorca Minorca from archipelago. Methods We performed 187 surveys using...
Abstract Quantifying the diversity of species in rich tropical marine environments remains challenging. Environmental DNA (eDNA) metabarcoding is a promising tool to face this challenge through filtering, amplification, and sequencing traces from water samples. However, reliability biodiversity detection eDNA samples can be low because density certainly patchy vast, heterogenous dynamic environment. So, number sampling replicates filtered volume necessary obtain accurate estimates using...