Eric Vidal

Eric Vidal
Institute of Research for Development | IRD · 237 - Mediterranean Institute of marine and terrestrial Biodiversity (IMBE)

PhD, HDR

About

153
Publications
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3,390
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Publications

Publications (153)
Article
Hunting is a major threat to many species of wildlife. However, managing hunting systems to ensure their sustainability requires a thorough demographic knowledge about the impact of hunting. Here we develop a framework integrating ecological, modelling and sociological data to achieve a sustainability assessment of flying-fox hunting in New Caledon...
Article
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Understanding the ecological mechanisms underpinning distribution patterns is vital in managing populations of mobile marine species. This study is a first step towards an integrated description of the habitats and spatial distributions of marine predators in the Natural Park of the Coral Sea, one of the world’s largest marine-protected areas at ab...
Poster
Full-text available
The impact of invasive predators on bats is still widely unknown, and generally not considered in bat conservation strategies. A recent literature review has shown that cats, Felis catus, in all their forms (domestic, stray or feral) prey upon many bat species far more frequently than is generally supposed including largest species (Pteropodids). H...
Article
Full-text available
New Caledonia hosts a large part of the world’s breeding population of the Tahiti Petrel Pseudobulweria rostrata. This rare, cryptic and little-studied seabird nests locally in the mountains up to 1,200 m in altitude, particularly in ultramafic (i.e. nickel-rich) areas where mining activity is a major threat. The considerable development of mining...
Article
en • Cats Felis catus, in all their forms (domestic, free‐roaming/stray and feral), have been identified as a major global threat to biodiversity, especially birds and small mammals. However, there has been little previous consideration of the extent and impact of predation of bats by cats, or of whether specific characteristics make certain speci...
Chapter
This 381-paged book covers the biology, ecology, impact and management of 34 common alien invasive species, with reviews on the history and context of avian introductions and invasions in five major regions (Oceania, Africa, Europe (including the Middle East, Asia and South America)), as well as management challenges and the potential of citizen sc...
Article
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Invasive feral cats threaten biodiversity at a global scale. Mitigating feral cat impacts and reducing their populations has therefore become a global conservation priority, especially on islands housing high endemic biodiversity. The New Caledonian archipelago is a biodiversity hotspot showing outstanding terrestrial species richness and endemism....
Article
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On large inhabited islands where complete eradication of alien invasive rodents through the use of poison delivery is often not practical or acceptable, mechanical trapping may represent the only viable option to reduce their impact in areas of high biodiversity value. However, the feasibility of sustained rodent control by trapping remains uncerta...
Article
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Two species breeding in sympatry are more likely to coexist if their ecological niches are segregated either in time, space or in trophic habits. Here, we combined GPS-tracking, stable isotope analysis and DNA metabarcoding analysis to understand how the rare Tahiti petrel Pseudobulweria rostrata (TP) copes with the very abundant (i.e. 500,000 bree...
Article
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The kagu (Rhynochetos jubatus) is an iconic endemic flightless bird from New Caledonia, red-listed as endangered according to the International Union for Conservation of Nature (IUCN) criteria. Feral cats are among the most successful and damaging invaders for island biodiversity. They have been directly responsible for the extinction of numerous b...
Article
Lunar phase and illumination are known to affect nocturnal behavior of many organisms, particularly through predator-prey interactions. Visual predators can benefit from higher light levels to increase their activity, while prey may decrease their activity to avoid predation. The lower number of nocturnal seabirds observed on colonies during full m...
Article
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The wedge-tailed shearwater (WTS) population of New Caledonia is one of the largest in the world, yet its biology and foraging ecology are poorly known. We studied WTS from 4 colonies in New Caledonia. We examined foraging behaviour and habitats using GPS receivers and light sensors during and outside the breeding season, respectively, and compared...
Article
Full-text available
Assessing population trends and their underlying factors is critical to propose efficient conservation actions. This assessment can be particularly challenging when dealing with highly mobile, shy and nocturnal animals such as flying-foxes. Here we investigated the dynamics of hunted populations of Pteropus ornatus and P. tonganus in the Northern P...
Article
Full-text available
The introduction of mammals on oceanic islands currently threatens or has caused the extinction of many endemic species. Cats and rats represent the major threat for 40 % of currently endangered island bird species. Direct (predation) and/or indirect (exploitative competition for food resource) trophic interactions are key mechanisms by which invad...
Article
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The increasing use of, and visits to, isolated territories by people (especially tourists) enables the investigation of how biodiversity reacts to evolutionarily novel pressures. We explored the behavioural reaction of a breeding seabird species, the Brown Noddy Anous stolidus to our repeated visits at two study sites in the Chesterfield Islands, a...
Article
Full-text available
In their Perspective “Seabird clues to eco- system health” (12 July, p. 116), E. Velarde et al. rightly point out that seabirds pro- vide crucial information about the state of marine ecosystems. However, they do not mention the role of seabirds on land and shorelines. Seabirds that forage at sea and breed on land play an essential role in cross-ec...
Poster
Full-text available
Understanding the spatial and temporal dynamic of a population and its underlying factors is critical to propose efficient conservation actions. This is all the more true since conservationists are dealing with highly mobile and vulnerable animals such as flying-foxes. In New Caledonia (South Pacific), ongoing studies are conducted on spatial ecolo...
Poster
Full-text available
Flying foxes in the Pacific are species with high ecological and/or cultural issues Nevertheless, flying foxes are often the largest native frugivorous and nectarivorous in islands and also possess the highest capacity of movement which suggests a high potential for seed dispersal and pollination Bats are the only terrestrial native mammals of the...
Article
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Invasive rats (Rattus rattus, R. norvegicus, R. exulans) are recognized as a major threat to native island ecosystems and biodiversity. On many islands, two or three invasive rat species co-occur, often sharing the same habitat; however few studies have focused on the effects of coexisting invasive rat species on native biodiversity. We investigate...
Conference Paper
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New Caledonia is a tropical archipelago of the South Pacific Ocean, and is one of the 36 world biodiversity hotspots. However, its unique biodiversity is increasingly threatened by habitat fragmentation and introductions of invasive alien species. Among these invaders, the red-vented bulbul (Pycnonotus cafer) is currently expanding towards the nort...
Article
Full-text available
The biodiversity hotspot of New Caledonia hosts high levels of endemism (74% of flora) that is threatened increasingly by climate change, habitat reduction, and invasive species. The fruit‐eating red‐vented bulbul (Pycnonotus cafer) is currently invading the main island of the archipelago, and its recent dispersal out of urbanized habitats raises q...
Article
Full-text available
The 11 French Overseas tropical island territories, located in three oceans (Atlantic, Indian and Pacific), harbored a high species and habitat diversity on small terrestrial areas. Indeed, these islands comprise 70% of the 17,947 endemic plant and animal species known in France on an area of only 4 % of the French nation. This “mega-biological” di...
Article
Full-text available
Invasive alien species are a major cause of biodiversity loss globally, but especially on islands where high species richness and levels of endemism accentuate their impacts. The Red vented bulbul (Pycnonotus cafer), a tropical passerine bird that has been introduced widely across locations of high conservation value, is considered an extreme pest....
Data
Parameter estimates and confidence intervals from the linear mixed model investigating the distribution of the Red-vented bulbul abundance within its current range. Significant parameters are in bold. (DOCX)
Data
Raw data frame of the 2473 point counts used in this study. Columns “site”, “index”, and “point” describe the location of each point. X and Y are the GPS coordinates in the WGS84 system. “Day” correspond the day number (1–365). The “hab” and “hab1” columns describe respectively the macro-habitat (6 levels) where the point was located, and correspon...
Data
Mean abundance of 14 bird species in man-modified habitats depending on the presence of the Red-vented bulbul. The “RVB overlap” column represent the percentage of the current range of the bulbul where each species is considered present. Sympatry corresponds to the number of sampling points at which the species as been recorded together with the bu...
Data
List of bird species considered in the study. The Order, Family and species names are given for each studied bird species, as well as the authority reference. The origin of each species is provided regarding their presence in New Caledonia. Local conservation status, based on the Code de l’environnement de la Province Sud (DEPS, 2016), indicates if...
Data
Full list of habitats considered in the point counts monitoring. (DOCX)
Data
Model selection and averaging on the mean abundance of four species of native New Caledonian birds. Pycaf and actri represent the abundance of Pycnonotus cafer and Acridotheres tristis respectively. sHab represents sub-habitats. Model selection and averaging was conducted with the abundance of four species as explained variables. Characteristics of...
Article
Full-text available
Recently, debate has flourished about inadequacies in the simplistic “worst invasive species” approach and its global scale. Here we investigate the status of the red-vented bulbul (Pycnonotus cafer), an Asian passerine bird. This species has been introduced widely across Pacific islands and is commonly blamed for its impacts on agriculture and bio...
Presentation
Full-text available
Ecological restauration of Bagaud Island (Parc National de Port-Cros)
Article
Feral cats (Felis catus) are one of the most successful and harmful invasive predator species, leading to dramatic loss of biodiversity across the globe. Our study assessed feral cat predation in a major biodiversity hotspot: the New Caledonian archipelago. We focused on the consequences of this predation for the outstanding endemic fauna found thr...
Poster
Full-text available
La viabilité des espèces gibiers endémiques dans les milieux insulaires représente un challenge pour les biologistes de la conservation, en particulier lorsqu'il est nécessaire de préserver les populations d'espèces exploitées à un niveau permettant de perpétuer les prélèvements associés à la culture et aux coutumes locales. C'est le cas de nombreu...
Poster
Full-text available
Among invasive species, feral cats are one of the most successful and harmful predator species leading to dramatic loss of biodiversity the world’s islands. Effective feral cat management (eradications, controls) on numerous islands resulted generally in positive effects for native biodiversity conservation. The lack of feral cat diet study in the...
Article
Full-text available
Seabirds concentrate nutrients from large marine areas on their nesting islands playing an important ecological role in nutrient transfer between marine and terrestrial ecosystems. Here we investigate the role of guano on corals reefs across scales by analyzing the stable nitrogen isotopic (δ15N) values of the scleractinian coral Pocillopora damico...
Article
Full-text available
Invasive rats (Rattus spp.) are known to have pervasive impacts on island birds, particularly on their nesting success. To conserve or restore bird populations, numerous invasive rat control or eradication projects are undertaken on islands worldwide. However, such projects represent a huge investment and the decision-making process requires proper...
Article
Full-text available
Squamata are one of the most threatened groups among island vertebrates, facing high pressure from exotic species. However, the contribution of small terrestrial reptiles in invasive rodents’ diet remains poorly investigated, partly because of the lack of tools for accurately identifying chewed prey fragments in gut contents. The New Caledonia arch...
Article
Full-text available
Native frugivores play an important role in native plant community dynamics by participating in seed dispersal. Today many island forests are invaded by introduced omnivores, such as rats, but their role in dispersing native plants is still little known. Here, we evaluated whether native seeds from New-Caledonian rainforests can germinate after pas...
Article
Full-text available
Invasive rats are one of the world's most successful animal groups that cause native species extinctions and ecosystem change, particularly on islands. On large islands, rat eradication is often impossible and population control, defined as the local limitation of rat abundance, is now routinely performed on many of the world's islands as an altern...
Conference Paper
Full-text available
Lists of “worst” invasive alien species such as that produced by the IUCN Invasive Species Specialist Group were designed in response to pressing conservation management issues caused by invasive alien species (IAS). IAS are considered to be one of the main causes of biodiversity loss, especially on islands where the high endemicity and naivete of...
Article
Full-text available
The impact of alien predator species on insular native biota has often been attributed to island prey naïveté (i.e. lack of, or inefficient, anti-predator behavior). Only rarely, however, has the concept of island prey naïveté been tested, and then only a posteriori (i.e. hundreds or thousands of years after alien species introduction). The presenc...
Article
Seabirds are one of the most threatened animal taxa worldwide as they have to deal with threats both at sea and on their breeding grounds. One of these threats is the loss and deterioration of their nesting habitat. Here, we evaluated the long-term effectiveness of providing artificial burrows for the conservation of Yelkouan (Puffinus yelkouan) an...
Article
Full-text available
Seabirds are particularly vulnerable to introduced alien mammalian predators, especially invasive rats, which are the main contributors to seabird extinction and endangerment in many places worldwide. However, this appears context-dependent because, paradoxically, cases of apparent long-term coexistence between rats and some species of seabird have...
Article
Full-text available
Biological invasions are recognized as one of the major threats to island biodiversity conservation, and numerous studies have been conducted around the world to restore the biodiversity of islands submitted to invasive species impacts. However, few scientific post-eradication studies were piloted notably for the biodiversity assessment of Arthropo...
Article
Full-text available
Cats are considered one of the most harmful invasive predators of island native species, particularly adult shearwaters, which are highly vulnerable to predation. Populations of Yelkouan shearwater, an endemic species of the Mediterranean basin with only a few large breeding colonies, are predicted to decline in response to feral or free-roaming ca...
Article
Full-text available
Domestic cats are one of the most widespread predators on islands worldwide and are responsible for numerous reductions and extinctions of species on islands. The three main islands of the Hyères Archipelago house one of the largest colonies of the Mediterranean endemic Yelkouan shearwater Puffinus yelkouan that has recently been up-listed by the I...
Article
Full-text available
En 2011, une opération d’éradications simultanées de 2 taxa exotiques envahissants, le Rat noir (Rattus rattus) et les Griffes de sorcière (Carpobrotus spp.) a été entreprise sur l’île de Bagaud, réserve intégrale située au sein du Parc national de Port Cros, dans le sud-est de la France. Un contrôle réalisé en 2014 a permis de conclure au succès d...
Conference Paper
Full-text available
Biological invasions represent one of the main threats to biodiversity, especially on islands where invasive are the first cause of biodiversity loss. Alien mammalian predators have been responsible for numerous island species extinctions worldwide, and feral cats are among the most successful and damaging invaders due to their generalist predatory...
Research
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The "strategic analysis" has been conducted in 2012-2014 as part of the process of creation of the Coral Sea nature park, an MPA located in New Caledonia. This document aims at giving a synthesis of the available knowledge and identifying key conservation and socio-economic issues that will be adressed by the Park's management plan in the future. A...
Article
Seabirds are particularly vulnerable to introduced alien mammalian predators, especially invasive rats, which are the main contributors to seabird extinction and endangerment in many places worldwide. However, this appears context-dependent because, paradoxically, cases of apparent long-term coexistence between rats and some species of seabird have...
Article
Background Black rats Rattus rattus and mat-forming iceplants, Carpobrotus aff. acinaciformis and Carpobrotus edulis are pervasive pests on Mediterranean islands. Their cumulative impacts on native biotas alter the functioning of island ecosystems and threaten biodiversity. We report here the first attempt to eradicate both taxa from a protected na...
Article
Bird conservation is nowadays a strong driving force for prioritizing rodent eradications, but robust quantitative estimates of impacts are needed to ensure cost-effectiveness of management operations. Here, we reviewed the published literature to investigate on what methodological basis rodent effects on island bird communities have been evaluated...
Article
Full-text available
On islands, invasive predators, particularly feral cats and rats, are key drivers of bird population decline and extinction. Diet studies can be used to assess predator impacts on prey populations. Here we first evaluated the resolution of morphological identification (Class to Species) of bird remains in cat and rat diet studies. We also analysed...