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Nicolas Guillemot

Nicolas Guillemot
DEXEN Ltd. (Dévelopement & EXpertise en ENvironnement)

PhD

About

29
Publications
7,066
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Citations

Publications

Publications (29)
Article
Full-text available
Extensive biological field surveys are costly and time consuming. To optimize sampling and ensure regular monitoring on the long term, identifying informative indicators of anthropogenic disturbances is a priority. In this study, we used 1800 candidate indicators by combining metrics measured from corals, fishes and macro-invertebrates assemblages...
Article
Full-text available
Numerous threats impact coral reefs and conservation actions are urgently needed. Fast production of marine habitat maps promotes the use of habitat-only conservation plans, where a given percentage of the area of each habitat is set as conservation objectives. However, marine reserves can impact access to fishing grounds and generate opportunity c...
Article
Full-text available
Collecting spatial information on fisheries catch and effort is essential to understanding the spatial processes of exploited population dynamics and to manage heterogeneously distributed resources and uses. The use of fishers' knowledge through geographical information systems (GISs) is increasingly considered as a promising source of local inform...
Article
Full-text available
This paper presents some results of an interdisciplinary research programme located on the northwest coast of New Caledonia from 2008 to 2011. This area faces rapid and significant urban and economic changes induced by an on-going major mining complex that is rooted within current political issues of the New Caledonian decolonisation process. An ad...
Article
Full-text available
Parts of coral reefs from New Caledonia (South Pacific) were registered at the UNESCO World Heritage list in 2008. Management strategies aiming at preserving the exceptional ecological value of these reefs in the context of climate change are currently being considered. This study evaluates the appropriateness of an exclusive fishing ban of herbivo...
Data
Full-text available
Literature data used for global scale analysis. Values of coral cover and macroalgal cover were extracted from 27 publications including 36 case studies. “t0” refers to a period before the climatic disturbance, “t1” soon after, and “t2” several months and years after. For each case study, the exact year or month at which observations were obtained...
Data
Data used for New Caledonia case study analysis. a) List of herbivorous fish species with information on their diet and fishing status. b) Average values of benthic cover and fish variables in each site. c) Average values and results of statistical comparisons (F statistic, P value) between biotopes and levels of fishing pressure. (XLSX)
Data
Observed reef fish species and corresponding functional traits, as used for building functional groups: diet (P: piscivores, C: carnivores, H: herbivores-detritus feeders, Z: plankton feeders), adult size (1: <8 cm, 2: 8–15 cm, 3: 15–30 cm, 4: 30–50 cm, 5: 50–80 cm, 6: >80 cm), home range (1: sedentary; 2: mobile; 3: very mobile) and gregariousness...
Data
GLM testing the effects of habitat and fishing pressure on the redundancy of each observed function (diet×size classification scheme) and on the functional redundancy of the whole coral reef fish assemblage. (DOC)
Data
GLM testing the effects of habitat on the redundancy of each observed function (diet×size classification scheme) and on the functional redundancy of the whole coral reef fish assemblage. (DOC)
Article
Full-text available
The relationship between species and the functional diversity of assemblages is fundamental in ecology because it contains key information on functional redundancy, and functionally redundant ecosystems are thought to be more resilient, resistant and stable. However, this relationship is poorly understood and undocumented for species-rich coastal m...
Article
Full-text available
Monitoring fish and underwater habitats, particularly in and around marine protected areas (MPAs) requires non-destructive observation methods. This is generally achieved by divers conducting underwater visual censuses (UVC), but video-based techniques are now being used more often to observe underwater macrofauna and habitats. A comparison of thes...
Article
From 2008 onwards, the coral reefs of Koné (New Caledonia) will be subjected to a major anthropogenic perturbation linked to development of a nickel mine. Dredging and sediment runoff may directly damage the reef environment whereas job creation should generate a large demographic increase and thus a rise in fishing activities. This study analyzed...
Article
The coral reefs in New Caledonia have long been used by the local population for subsistence as well as commercial and recreational purposes. The impact of informal fisheries on reef ecosystems illustrated the idiosyncrasies of New Caledonian fisheries in the southwest Pacific. This paper compared informal fishery systems on the southwest coast (cl...
Article
Full-text available
The impacts of the unusually strong Cyclone Erica (March 2003) on coral reef habitats at a site located on the northwest coast of New Caledonia (South Pacific) were assessed using a 6-year data set (2002–2007). We examined the interannual variations of key variables describing reef habitats (live hard and soft corals, dead corals in place, coral de...
Article
Full-text available
Development of mining complex has recently begun in the rural area of Voh-Koné-Pouembout (New Caledonia). As a consequence, significant human and economic developments are expected; and fishing pressure on local reef fish resources is likely to increase. In this context, it appeared necessary to develop an appropriate baseline for the establishment...
Article
Full-text available
On the rural north-west coast of New Caledonia, the settlement of a major mining complex is expected to cause rapid and important socio-economic changes, resulting in significant effects on local fishing practices and their impact on resources. Fisher interviews were conducted in 2007 in this area to estimate fish catches, fishing yields and effort...
Article
Full-text available
L'implantation d'une usine métallurgique de l'industriel Koniambo Nickel SAS représente un moteur de développement économique pour la Province Nord : création d'emplois, fixation ou migration des populations, urbanisation pluys intensive... Ces changements sociétaux sont indissociables des enjeux de gestion du lagon de la zone Voh-Koné-Pouembout. Q...
Article
Full-text available
L'implantation d'une usine métallurgique de l'industriel Koniambo Nickel SAS représente un moteur de développement économique pour la Province Nord : création d'emplois, fixation ou migration des populations, urbanisation pluys intensive... Ces changements sociétaux sont indissociables des enjeux de gestion du lagon de la zone Voh-Koné-Pouembout. Q...
Article
Full-text available
L'implantation d'une usine métallurgique de l'industriel Koniambo Nickel SAS représente un moteur de développement économique pour la Province Nord : création d'emplois, fixation ou migration des populations, urbanisation pluys intensive... Ces changements sociétaux sont indissociables des enjeux de gestion du lagon de la zone Voh-Koné-Pouembout. Q...
Article
Full-text available
Most studies involving Pacific reef fishes use underwater visual censusing techniques to estimate their biomass and stock. This requires to know the length-weight relationships of all the species censused. Currently, only a small proportion of these relationships (15.4%) are available for reef fish species in the Pacific area. In the present articl...

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