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Comparaison des observations des communautés de poissons, obtenues par comptages en point fixe rotatif video et en plongée, effectués sur les mêmes points de la pente récifale dans la zone de Ouano en 2009 ArchiMer
Mallet, Delphine.
Résumé:A partir d’un article accepté pour publication, ce document reporte les résultats d’une étude quia comparé la capacité à échantillonner les communautés de poissons récifaux, aux mêmes endroits, en utilisant deux techniques : le comptage en plongée en point fixe (UVC) et la station vidéo rotative (STAVIRO). Les observations UVC et STAVIRO ont été effectuées sur les mêmes 26 points de la pente récifale d’un récif intermédiaire et d’un récif barrière. Les systèmes STAVIRO étaient toujours déployés 30 min à 1 heure après les UVC et placées exactement au même endroit. NB : Ce travail a fait l’objet d’une publication scientifique à paraître dans le journal PLoS ONE : Mallet D., Wantiez L., Lemouellic S., Vigliola L., Pelletier D. (2013) Complementarity of...
Tipo: Text Palavras-chave: Assemblages des poissons récifaux; Station video rotative (STAVIRO); Comptage visuel en plongée (UVC); Comptage en point fixe.
Ano: 2015 URL: http://archimer.ifremer.fr/doc/00274/38567/37089.pdf
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Complementarity of Rotating Video and Underwater Visual Census for Assessing Species Richness, Frequency and Density of Reef Fish on Coral Reef Slopes ArchiMer
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...
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Ano: 2014 URL: http://archimer.ifremer.fr/doc/00170/28132/26352.pdf
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Des systèmes vidéo rotatifs pour étudier l'ichtyofaune : Applications à l’analyse des variations spatiales et temporelles dans le lagon de Nouvelle-Calédonie ArchiMer
Mallet, Delphine.
Estimating diversity and abundance of fish is fundamental for the understanding of community structure and dynamics of coral reefs. Observations are generally gathered using Underwater Visual Census (UVC). These informations can also be collected by underwater video techniques involving no diver and allowing a high spatial and temporal coverage. The first part of this PhD thesis is a review of publications using underwater video techniques between 1952 and 2012. The second part present two rotating video systems used to study the diversity of ichthyofauna and habitats in the lagoon of New Caledonia: the STAVIRO (for "STAtion VIdeo ROtative") and the MICADO (for "Module d’Imagerie Côtier, Autonome pour le Développement de l’Observation sous-marine"). The...
Tipo: Text Palavras-chave: Vidéo sous-marine; Systèmes d’observation; Poissons coralliens; Nouvelle-Calédonie; Underwater video; Observation systems; Coral reef fish; New Caledonia.
Ano: 2014 URL: http://archimer.ifremer.fr/doc/00189/30050/28536.pdf
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Diurnal temporal patterns of the diversity and the abundance of reef fishes in a branching coral patch in New Caledonia ArchiMer
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
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Evaluation de l’état de santé des récifs par stations vidéo rotatives STAVIRO : Bourail, Zone Côtière Ouest, Campagne 2012. ArchiMer
Roman, William; Pelletier, Dominique; Powell, Abigail; Bockel, Thomas; Gonson, Charles; Mallet, Delphine.
This work deals with fish communities and associated habitats, in the context of New Caledonian coral reef ecosystems. It was conducted within the AMBIO project. The study relies on remote unbaited underwater video observations, using the STAVIRO rotating technique. The study takes place in the Bourail area, an area (Western Coastal Area) part of the World Heritage site “New Caledonian lagoons”. It encompasses two Marine Protected Areas, Poé and the Ile Verte. The sampling design covers the entire area, and was stratified according to reef geomorphology and protection status. 150 stations were validated within 6 days (40hrs spent at sea). They were analyzed to characterize the habitat surrounding each station, and fish communities, based on a species list...
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Ano: 2014 URL: http://archimer.ifremer.fr/doc/00270/38083/36217.pdf
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Observer, évaluer et suivre la biodiversité sous marine des lagons : Intérêt des techniques vidéo rotatives en haute dé:nition. Où en est-on en Nouvelle-Calédonie ? ArchiMer
Pelletier, Dominique; Mallet, Delphine; Roman, William; Loubersac, Lionel.
This article first draws up a balance sheet of all various implemented techniques to observe and monitor the shallow marine biodiversity. Then the article focuses on the techniques of the rotating high resolution submarine video and their implementation in New Caledonia on various sites and habitats under various management / protection policies such as Marines Protected Areas, strict marine reserves, registered sites on UNESCO world heritage or free access zones. An evaluation of these techniques and of their contributions is proposed in terms of transfer to other geographical zones, of practical feasibility in the technical, logistic and cost point of view as also are analyzed the perspectives offered by those technologies in terms of innovation, of...
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Ano: 2014 URL: http://archimer.ifremer.fr/doc/00174/28506/26855.pdf
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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 ArchiMer
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
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Remote High-Definition Rotating Video Enables Fast Spatial Survey of Marine Underwater Macrofauna and Habitats ArchiMer
Pelletier, Dominique; Leleu, Kevin; Mallet, Delphine; Mou-tham, Gerard; Herve, Gilles; Boureau, Matthieu; Guilpart, Nicolas.
Observing spatial and temporal variations of marine biodiversity from non-destructive techniques is central for understanding ecosystem resilience, and for monitoring and assessing conservation strategies, e.g. Marine Protected Areas. Observations are generally obtained through Underwater Visual Censuses (UVC) conducted by divers. The problems inherent to the presence of divers have been discussed in several papers. Video techniques are increasingly used for observing underwater macrofauna and habitat. Most video techniques that do not need the presence of a diver use baited remote systems. In this paper, we present an original video technique which relies on a remote unbaited rotating remote system including a high definition camera. The system is set on...
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Ano: 2012 URL: http://archimer.ifremer.fr/doc/00078/18879/16453.pdf
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The impacts of short-term temporal factors on the magnitude and direction of marine protected area effects detected in reef fish monitoring ArchiMer
Powell, Abigail; Pelletier, Dominique; Jones, Timothy; Mallet, Delphine.
Marine protected areas (MPA) and in particular no-take marine reserves have been identified as important tools for the conservation of reef fish and habitats. A significant challenge of reef fish monitoring is to determine the influence of temporal factors on fish counts. Fish assemblages are dynamic and changes in activity patterns throughout the day can influence the results of surveys. While many monitoring programs account for the impacts of spatial heterogeneity on fish assemblages the effects of short-term temporal variation are less well known. In the present study, we analysed data from 197 video drops inside and outside New Caledonian MPAs and examined temporal variations in various metrics commonly used to monitor marine reserves. In addition to...
Tipo: Text Palavras-chave: Monitoring; Marine protected areas; Temporal variability; Coral reef fish.
Ano: 2016 URL: https://archimer.ifremer.fr/doc/00358/46964/46878.pdf
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Underwater video techniques for observing coastal marine biodiversity: A review of sixty years of publications (1952–2012) ArchiMer
Mallet, Delphine; Pelletier, Dominique.
Underwater video techniques are increasingly used in marine ecology studies. Technological progress regarding video cameras, sensors (such as sounders), battery life and information storage make these techniques now accessible to a majority of users. However, diver-based underwater visual censuses, and catch and effort data, remain the most commonly used for observing coastal biodiversity and species. In this paper, we review the underwater video techniques that have been developed since the 1950s to investigate and/or monitor coastal biodiversity. Techniques such as remote underwater video, whether baited or not, diver-operated video and towed video are described, along with corresponding applications in the field. We then analyse the complementary of...
Tipo: Text Palavras-chave: Underwater video; Monitoring; Coastal biodiversity; Fish; Habitat.
Ano: 2014 URL: http://archimer.ifremer.fr/doc/00181/29274/27901.pdf
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