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| Registros recuperados: 10 | |
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| 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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| 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... |
| Tipo: Text |
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| Ano: 2012 |
URL: http://archimer.ifremer.fr/doc/00078/18879/16453.pdf |
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| 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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| 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 |
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| Ano: 2014 |
URL: http://archimer.ifremer.fr/doc/00170/28132/26352.pdf |
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| 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... |
| Tipo: Text |
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| Ano: 2014 |
URL: http://archimer.ifremer.fr/doc/00174/28506/26855.pdf |
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| 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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| 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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| 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... |
| Tipo: Text |
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| Ano: 2014 |
URL: http://archimer.ifremer.fr/doc/00270/38083/36217.pdf |
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| Registros recuperados: 10 | |
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