Consulta: creatorFacets:"Wantiez, Laurent"
Registros recuperados: 16
Data/hora: 08/06/2024 17:39:52

Global baselines and benchmarks for fish biomass: comparing remote reefs and fisheries closures
Provedor de dados: 5
Autores: Mcclanahan, Tim R.; Schroeder, Robert E.; Friedlander, Alan M.; Vigliola, Laurent; Wantiez, Laurent; Caselle, Jennifer E.; Graham, Nicholas A. J.; Wilson, Shaun; Edgar, Graham J.; Stuart-smith, Rick D.; Oddenyo, Remy M.; Cinner, J. E.
Baselines and benchmarks (B&amp;Bs) are needed to evaluate the ecological status and fisheries potential of coral reefs. B&amp;Bs may depend on habitat features and energetic limitations that constrain biomass within the natural variability of the environment and fish behaviors. To evaluate if broad B&amp;Bs exist, we compiled data on the biomass of fishes in similar to 1000 reefs with no recent history of fishing in 19 ecoregions. These reefs spanned the full longitude and latitude of Indian and Pacific Ocean reefs and included older high-compliance fisheries closures (&gt;15 yr closure) and remote reef areas (&gt;9 h travel time from fisheries markets). There was no significant change in biomass over the 15 to 48 yr closure period but closures had only...
Tipo: Text
Palavras-chave: Baselines; Coral reef fish; Fisheries and ecological indicators; Pristine or virgin biomass; Sustainability.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00589/70064/68028.pdf

Diurnal temporal patterns of the diversity and the abundance of reef fishes in a branching coral patch in New Caledonia
Provedor de dados: 5
Autores: Mallet, Delphine; Vigliola, Laurent; Wantiez, Laurent; Pelletier, Dominique.
Small-scale spatial and temporal variability in animal abundance is an intrinsic characteristic of marine ecosystems but remains largely unknown for most animals, including coral reef fishes. In this study, we used a remote autonomous unbaited video system and recorded reef fish assemblages during daylight hours, 10 times a day for 34 consecutive days in a branching coral patch of the lagoon of New Caledonia. In total, 50 031 fish observations belonging to 114 taxa, 66 genera and 31 families were recorded in 256 recorded videos. Carnivores and herbivore-detritus feeders dominated the trophic structure. We found significant variations in the composition of fish assemblages between times of day. Taxa richness and fish abundance were greater in the early...
Tipo: Text
Palavras-chave: Coral reef fish; High-frequency sampling; Patterns; Temporal variation; Underwater video.
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00326/43755/45787.pdf

Extent of Mangrove Nursery Habitats Determines the Geographic Distribution of a Coral Reef Fish in a South-Pacific Archipelago
Provedor de dados: 5
Autores: Paillon, Christelle; Wantiez, Laurent; Kulbicki, Michel; Labonne, Maylis; Vigliola, Laurent.
Understanding the drivers of species' geographic distribution has fundamental implications for the management of biodiversity. For coral reef fishes, mangroves have long been recognized as important nursery habitats sustaining biodiversity in the Western Atlantic but there is still debate about their role in the Indo-Pacific. Here, we combined LA-ICP-MS otolith microchemistry, underwater visual censuses (UVC) and mangrove cartography to estimate the importance of mangroves for the Indo-Pacific coral reef fish Lutjanus fulviflamma in the archipelago of New Caledonia. Otolith elemental compositions allowed high discrimination of mangroves and reefs with 83.8% and 98.7% correct classification, respectively. Reefs were characterized by higher concentrations of...
Tipo: Text
Ano: 2014
URL: https://archimer.ifremer.fr/doc/00221/33271/35756.pdf

Isolation and no-entry marine reserves mitigate anthropogenic impacts on grey reef shark behavior
Provedor de dados: 5
Autores: Juhel, Jean-baptiste; Vigliola, Laurent; Wantiez, Laurent; Letessier, Tom B.; Meeuwig, Jessica J.; Mouillot, David.
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 are well known for terrestrial fauna but poorly documented for marine species. Using an extensive sampling of 367 stereo baited underwater videos systems, we show modifications in grey reef shark (Carcharhinus amblyrhynchos) occurrence and feeding behavior along a marked gradient of isolation from humans across the New Caledonian archipelago (South-Western Pacific). The probability of occurrence decreased by 68.9% between wilderness areas (more than 25 hours travel time from the capital city) and impacted...
Tipo: Text
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00483/59500/62369.pdf

Meeting fisheries, ecosystem function, and biodiversity goals in a human-dominated world
Provedor de dados: 5
Autores: Cinner, Joshua E.; Zamborain-mason, Jessica; Gurney, Georgina G.; Graham, Nicholas A. J.; Macneil, M. Aaron; Hoey, Andrew S.; Mora, Camilo; Villéger, Sébastien; Maire, Eva; Mcclanahan, Tim R.; Maina, Joseph M.; Kittinger, John N.; Hicks, Christina C.; D’agata, Stephanie; Huchery, Cindy; Barnes, Michele L.; Feary, David A.; Williams, Ivor D.; Kulbicki, Michel; Vigliola, Laurent; Wantiez, Laurent; Edgar, Graham J.; Stuart-smith, Rick D.; Sandin, Stuart A.; Green, Alison L.; Beger, Maria; Friedlander, Alan M.; Wilson, Shaun K.; Brokovich, Eran; Brooks, Andrew J.; Cruz-motta, Juan J.; Booth, David J.; Chabanet, Pascale; Tupper, Mark; Ferse, Sebastian C. A.; Sumaila, U. Rashid; Hardt, Marah J.; Mouillot, David.
The worldwide decline of coral reefs necessitates targeting management solutions that can sustain reefs and the livelihoods of the people who depend on them. However, little is known about the context in which different reef management tools can help to achieve multiple social and ecological goals. Because of nonlinearities in the likelihood of achieving combined fisheries, ecological function, and biodiversity goals along a gradient of human pressure, relatively small changes in the context in which management is implemented could have substantial impacts on whether these goals are likely to be met. Critically, management can provide substantial conservation benefits to most reefs for fisheries and ecological function, but not biodiversity goals, given...
Tipo: Text
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00623/73532/72911.pdf

Considering multiple-species attributes to understand better the effects of successive changes in protection status on a coral reef fish assemblage
Provedor de dados: 5
Autores: Preuss, Bastien; Pelletier, Dominique; Wantiez, Laurent; Letourneur, Yves; Sarramegna, Sebastien; Kulbicki, Michel; Galzin, Rene; Ferraris, Jocelyne.
The response of fish assemblages to changes in protection status is a major issue for both biodiversity conservation and fishery management. In New Caledonia, the Abore reef marine reserve harbours more than 500 fish species, and has been subjected to changes in protection status since 1988. The present study investigates the impact of these changes on a wide subset of species (213), based on underwater visual counts collected before the opening and after the closure to fishing of this marine protected area (MPA). We analysed the spatial and temporal variability in fish assemblage attributable to protection status, explicitly considering habitat. To understand the successive responses of fish assemblage to fishing and protection, the assessment models...
Tipo: Text
Palavras-chave: MPA effect; Fishing effect; Fish assemblage; Coral reef ecosystem; Assessment model.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/2009/publication-6130.pdf

PAMPA - Indicateurs de la Performance d’Aires Marines Protégées pour la gestion des écosystèmes côtiers, des ressources et de leurs usAges. Rapport du site Nouvelle-Calédonie
Provedor de dados: 5
Autores: Wantiez, Laurent; Pelletier, Dominique; Coutures, Emmanuel; Gamp, Elodie; Rolland, Emeline; Mallet, Delphine; Reecht, Yves; Dumas, Pascal; Jollit, Isabelle; Vigliola, Laurent.
This documents reports activities conducted within the PAMPA project for the New Caledonia case study (Noumea Marine Reserves)
Tipo: Text
Palavras-chave: Livrable; Rapport par site; Tableau de bord.
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00351/46171/45873.pdf

Gravity of human impacts mediates coral reef conservation gains
Provedor de dados: 5
Autores: Cinner, Joshua E.; Maire, Eva; Huchery, Cindy; Macneil, M. Aaron; Graham, Nicholas A. J.; Mora, Camilo; Barnes, Michele L.; Kittinger, John N.; Hicks, Christina C.; D'Agata, Stephanie; Hoey, Andrew S.; Gurney, Georgina G.; Feary, David A.; Williams, Ivor D.; Kulbicki, Michel; Vigliola, Laurent; Wantiez, Laurent; Edgar, Graham J.; Stuart-smith, Rick D.; Sandin, Stuart A.; Green, Alison; Hardt, Marah J.; Beger, Maria; Friedlander, Alan M.; Wilson, Shaun K.; Brokovich, Eran; Brooks, Andrew J.; Cruz-motta, Juan J.; Booth, David J.; Chabanet, Pascale; Gough, Charlotte; Tupper, Mark; Ferse, Sebastian C. A.; Sumaila, U. Rashid; Pardede, Shinta; Mouillot, David.
Coral reefs provide ecosystem goods and services for millions of people in the tropics, but reef conditions are declining worldwide. Effective solutions to the crisis facing coral reefs depend in part on understanding the context under which different types of conservation benefits can be maximized. Our global analysis of nearly 1,800 tropical reefs reveals how the intensity of human impacts in the surrounding seascape, measured as a function of human population size and accessibility to reefs ("gravity"), diminishes the effectiveness of marine reserves at sustaining reef fish biomass and the presence of top predators, even where compliance with reserve rules is high. Critically, fish biomass in high-compliance marine reserves located where human impacts...
Tipo: Text
Palavras-chave: Marine reserves; Fisheries; Coral reefs; Social-ecological; Socioeconomic.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00450/56115/68021.pdf

Evaluating Management Scenarios for Fished Resources of the New Caledonian Lagoon Using a Spatially-Explicit Model
Provedor de dados: 5
Autores: Preuss, Bastien; Pelletier, Dominique; Wantiez, Laurent.
In the New Caledonian lagoon, fish populations live in a highly-fragmented habitat and seascape, and many are exploited by commercial, recreational and subsistence fishers. Although fishing has been increasing over decades, fisheries sustainability has not been assessed. We used the ISIS-Fish tool to build a spatially-explicit dynamic model for two major fish resources: spangled emperor and coral trout. The model was constructed and parameterized from many existing data habitat, fish populations, and fishing pressures. After calibration, it was used to simulate the outcomes of several management scenarios including MPA, size limitation, and increase in commercial fisher number. Results showed that depending on the species, an MPA could result in a...
Tipo: Text
Palavras-chave: Fish population dynamics; Spatially-explicit model; Management scenario assessment; Spangled emperor; Coral trout; New Caledonian lagoon.
Ano: 2014
URL: https://archimer.ifremer.fr/doc/00598/71022/69426.pdf

Complementarity of Rotating Video and Underwater Visual Census for Assessing Species Richness, Frequency and Density of Reef Fish on Coral Reef Slopes
Provedor de dados: 5
Autores: Mallet, Delphine; Wantiez, Laurent; Lemouellic, Soazig; Vigliola, Laurent; Pelletier, Dominique.
Estimating diversity and abundance of fish species is fundamental for understanding community structure and dynamics of coral reefs. When designing a sampling protocol, one crucial step is the choice of the most suitable sampling technique which is a compromise between the questions addressed, the available means and the precision required. The objective of this study is to compare the ability to sample reef fish communities at the same locations using two techniques based on the same stationary point count method: one using Underwater Visual Census (UVC) and the other rotating video (STAVIRO). UVC and STAVIRO observations were carried out on the exact same 26 points on the reef slope of an intermediate reef and the associated inner barrier reefs. STAVIRO...
Tipo: Text
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00170/28132/26352.pdf

Marine reserves lag behind wilderness in the conservation of key functional roles
Provedor de dados: 5
Autores: D'Agata, Stephanie; Mouillot, David; Wantiez, Laurent; Friedlander, Alan M.; Kulbicki, Michel; Vigliola, Laurent.
Although marine reserves represent one of the most effective management responses to human impacts, their capacity to sustain the same diversity of species, functional roles and biomass of reef fishes as wilderness areas remains questionable, in particular in regions with deep and long-lasting human footprints. Here we show that fish functional diversity and biomass of top predators are significantly higher on coral reefs located at more than 20 h travel time from the main market compared with even the oldest (38 years old), largest (17,500 ha) and most restrictive (no entry) marine reserve in New Caledonia (South-Western Pacific). We further demonstrate that wilderness areas support unique ecological values with no equivalency as one gets closer to...
Tipo: Text
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00346/45742/45379.pdf

Bright spots among the world's coral reefs
Provedor de dados: 5
Autores: Cinner, Joshua E.; Huchery, Cindy; Macneil, M. Aaron; Graham, Nicholas A. J.; Mcclanahan, Tim R.; Maina, Joseph; Maire, Eva; Kittinger, John N.; Hicks, Christina C.; Mora, Camilo; Allison, Edward H.; D'Agata, Stephanie; Hoey, Andrew; Feary, David A.; Crowder, Larry; Williams, Ivor D.; Kulbicki, Michel; Vigliola, Laurent; Wantiez, Laurent; Edgar, Graham; Stuart-smith, Rick D.; Sandin, Stuart A.; Green, Alison L.; Hardt, Marah J.; Beger, Maria; Friedlander, Alan; Campbell, Stuart J.; Holmes, Katherine E.; Wilson, Shaun K.; Brokovich, Eran; Brooks, Andrew J.; Cruz-motta, Juan J.; Booth, David J.; Chabanet, Pascale; Gough, Charlie; Tupper, Mark; Ferse, Sebastian C. A.; Sumaila, U. Rashid; Mouillot, David.
Ongoing declines in the structure and function of the world's coral reefs(1,2) require novel approaches to sustain these ecosystems and the millions of people who depend on them(3). A presently unexplored approach that draws on theory and practice in human health and rural development(4,5) is to systematically identify and learn from the 'outliers'-places where ecosystems are substantially better ('bright spots') or worse ('dark spots') than expected, given the environmental conditions and socioeconomic drivers they are exposed to. Here we compile data from more than 2,500 reefs worldwide and develop a Bayesian hierarchical model to generate expectations of how standing stocks of reef fish biomass are related to 18 socioeconomic drivers and environmental...
Tipo: Text
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00348/45872/68023.pdf

Feed intake, molt frequency, tissue growth, feed efficiency and energy budget during a molt cycle of mud crab juveniles, Scylla serrata (Forskål, 1775), fed on different practical diets with graded levels of soy protein concentrate as main source of protein
Provedor de dados: 5
Autores: Nguyen, Ngoc Thi Bich; Chim, Liet; Lemaire, Pierrette; Wantiez, Laurent.
There has been growing interest in the development of mud crab aquaculture in New Caledonia. However, for this to become established at a commercial level, a cost-effective formulated feed based on internationally-available ingredients needs to be developed. We have evaluated the optimal dietary protein content for juvenile crabs, Scylla serrata (Forskål, 1775), using a series of diets with a protein content ranging from 27 to 49% and soy protein concentrate (SPC) as the main protein source. For this purpose, 54 individually housed crabs were allocated to five dietary treatments (n = 10 or 11). The crabs were fed ad libitum, for 81 days with the allocated diets. The apparent digestibilities of dry mater, crude protein and energy were high (96.2-97.3%),...
Tipo: Text
Palavras-chave: Scylla serrata; Tissue growth; Feed efficiency; Protein requirement; Soy protein concentrate; Energy budget.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00211/32196/30630.pdf

Distributions of Indo-Pacific lionfishes Pterois spp. in their native ranges: implications for the Atlantic invasion
Provedor de dados: 5
Autores: Kulbicki, Michel; Beets, James; Chabanet, Pascale; Cure, Katherine; Darling, Emily; Floeter, Sergio R.; Galzin, Rene; Green, Alison; Harmelin-vivien, Mireille; Hixon, Mark; Letourneur, Yves; De Loma, Thierry Lison; Mcclanahan, Tim; Mcilwain, Jennifer; Moutham, Gerard; Myers, Robert; O'Leary, Jennifer K.; Planes, Serge; Vigliola, Laurent; Wantiez, Laurent.
Lionfish (Pterois volitans and P. miles) have become a major concern in the western Attantie and Caribbean since their introduction in the 1980s. Invasive lionfish can reach very high population densities on coral reefs in their invaded range, yet there are few data from their native range in the Indo-Pacific for comparison. We compiled data on the geographical distribution and density of Indo-Pacific lionfishes in their native ranges from published and unpublished underwater visual censuses and field collections. We found that lionfish in their native Indo-Pacific range are unevenly distributed, with higher densities in the Indian Ocean than in the Pacific. Lionfish densities increase significantly with increasing latitude, and are significantly higher in...
Tipo: Text
Palavras-chave: Pterois; Indo-Pacific; Ecology; Visual census; Larvae; Invasive species.
Ano: 2012
URL: https://archimer.ifremer.fr/doc/00207/31781/30193.pdf

Unexpected high vulnerability of functions in wilderness areas: evidence from coral reef fishes
Provedor de dados: 5
Autores: D'Agata, Stephanie; Vigliola, Laurent; Graham, Nicholas A. J.; Wantiez, Laurent; Parravicini, Valeriano; Villeger, Sebastien; Gerard Mou-tham,; Frolla, Philippe; Friedlander, Alan M.; Kulbicki, Michel; Mouillot, David.
High species richness is thought to support the delivery of multiple ecosystem functions and services under changing environments. Yet, some species might performunique functional roles while others are redundant. Thus, the benefits of high species richness in maintaining ecosystem functioning are uncertain if functions have little redundancy, potentially leading to high vulnerability of functions. We studied the natural propensity of assemblages to be functionally buffered against loss prior to fishing activities, using functional trait combinations, in coral reef fish assemblages across unfished wilderness areas of the Indo-Pacific: Chagos Archipelago, New Caledonia and French Polynesia. Fish functional diversity in these wilderness areas is highly...
Tipo: Text
Palavras-chave: Coral reef fish; Wilderness areas; Redundancy; Baseline functional vulnerability.
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00366/47680/68025.pdf

Biofloc technology applied to rear shrimp Litopenaeus Stylirostris broodstock: An integrated and development research project in New Caledonia and French Polynesia
Provedor de dados: 5
Autores: Chim, Liet; Cardona, Emilie; Lorgeoux, Benedicte; Gueguen, Yannick; Saulnier, Denis; Goguenheim, Jean; Wantiez, Laurent; Cahu, Chantal.
Shrimp farming in New-Caledonia faces up to difficulties. A fluctuating quality of broodstock prevents sustainable production of larvae in quantity and quality. The traditional extensive rearing method of broodstock in outdoor earthen ponds used in New Caledonia raises several issues: poor water quality control and biosecurity. Therefore it is fundamental to modify the broodstock culture strategy in order to achieve an easier water quality management and maximal biosecurity. Biofloc technology (BFT) offers easier water quality management, higher natural productivity, higher level of biosecurity, and could be a good alternative. Since 2011 a R&amp;D program started under the supervision of IFREMER in New Caledonia and French Polynesia in order to study and...
Tipo: Text
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00250/36084/34635.pdf