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| Chancerelle, Y. |
| This study presents an original method for the determination of the actual surface area of Scleractinian corals at colony-scale and at the scale of a whole reef. Firstly, at colony-scale, the technique consists of dipping coral colonies in a liquid paraffin bath and measuring the weight of the coral before and after the dipping. It is based on the relationship between the weight and the surface area of paraffin deposited and allows one to obtain the actual surface area of coral colonies in the laboratory. The main advantages of this method compared to others is that it uses easily obtainable materials and it is adaptable to all colony shapes. It was used on coral colonies representing the six most frequently seen colony shapes on the reefs of the island of... |
| Tipo: Text |
Palavras-chave: Surface développée; Colonie corallienne; Récif corallien; Actual surface area; Coral colony; Coral reef. |
| Ano: 2000 |
URL: http://archimer.ifremer.fr/doc/00325/43571/44052.pdf |
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| Chauvaud, S; Bouchon, C; Maniere, R. |
| In the framework of a comprehensive study of the coastal marine ecosystems of Guadeloupe Island (French West Indies), a remote sensing survey of marine communities was conducted in the Bay of the Grand Cul-de-Sac Marin. Pictures of SPOT satellite were used. At first sight, XS data from SPOT did not seem to be well adapted to extract information from deepest underwater areas. In the present study, a method for analysis of XS data was developed, which increases tenuous spectral differences associated to very low intensity signals. This technique led to a better distinction of objects, even the deepest ones. Reference surfaces were then identified in the field and a reliable supervised classification was conducted, which reflected the high diversity of... |
| Tipo: Text |
Palavras-chave: Télédétection; Cartographie; Récif corallien; Phanérogame marine; Mangrove; Remote sensing; Mapping; Coral reef; Seagrass; Mangrove. |
| Ano: 2001 |
URL: http://archimer.ifremer.fr/doc/00291/40267/38646.pdf |
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| Lison De Loma, Thierry; Harmelin-vivien, Mireille; Naim, Odile; Fontaine, Marie France. |
| There has, as yet, been little study of nutrient disturbance and its consequences on the functional biology of primary consumers in coral reefs. The processing of epilithic algal communities by the damselfish Stegastes nigricans was investigated at La Reunion, at two sites of a fringing reef, oligotrophic for one and eutrophic for the other. Differences between sites were analyzed in quantifying organic matter, organic carbon, nitrogen, and organic 'nutrients' (carbohydrate, lipid and protein) in the algal food, the digestive contents and the faeces of S. nigricans. In the disturbed site, algal turfs and digestive contents presented significantly higher organic matter, organic carbon, nitrogen and organic nutrient values. Absorption efficiency of total... |
| Tipo: Text |
Palavras-chave: Régime herbivore; Stegastes; Récif corallien; Eutrophisation; La Réunion; Herbivory; Stegastes; Coral reef; Eutrophication; La Reunion. |
| Ano: 2000 |
URL: http://archimer.ifremer.fr/doc/00323/43376/42835.pdf |
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| Fleury, Pierre-gildas; Cadet, Christophe. |
| The Réserve Naturelle Marine (Natural Marine Reserve) of La Réunion island has been created recently (2007) for managing the coral reef of La Réunion West coast. In this area, traditional shore fisheries and spear-fishing are now regulated, controlled and under scientific survey in order to optimize the management of these fisheries, mainly leisure activities. This report draws up a first evaluation of the Reserve eco-guards monitoring in 2008-2009 over these fisheries, with double aim of : - improving the methodology : sampling strategy, terminology standardization ; data base setting up ; - collecting a data series for future evolution survey and comparisons with previous data (before creation of the Reserve). According to the collected data, the... |
| Tipo: Text |
Palavras-chave: Pêches traditionnelles; Pêche à pied; Pêche sous-marine; CPUE; Récif corallien; Réserve Naturelle Marine; La Réunion. |
| Ano: 2010 |
URL: http://archimer.ifremer.fr/doc/00005/11615/8260.pdf |
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| Letourneur, Y; Labrosse, Pierre; Kulbicki, M. |
| A comparative study was conducted in two zones of the Northern Province of New Caledonia, one located windward (east coast) and the other located leeward (west coast). In each zone, three major sectors were investigated: fringing reefs close to areas of important mining activities, fringing reefs close to areas of moderate mining activities, and fringing reefs close to areas free of mining activities. In addition, on the west coast, fringing reefs close to areas of high natural ground erosion were also studied. Only commercial fish species sensus late were censused on a total of 163 stations, concerning 165 fish species. Substrate characteristics were not different between zones and sectors. However, significant differences were observed for living... |
| Tipo: Text |
Palavras-chave: Ichtyofaune; Récif corallien; Activité minière; Apport terrigène; Océan Pacifique; Ichthyofauna; Fringing reefs; Mining activities; Terrigeneous runoff; Pacific Ocean. |
| Ano: 1999 |
URL: https://archimer.ifremer.fr/doc/00325/43586/44026.pdf |
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