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| Jean, Claire; Ciccione, Stephane; Ballorain, Katia; Georges, Jean-yves; Bourjea, Jerome. |
| Reunion Island in the south-west Indian Ocean once had significant nesting populations of marine turtles but they declined rapidly after human colonization. In 1996, after regular sightings of turtles offshore, an aerial survey programme was initiated to monitor the occurrence of marine turtles and their distribution along the west coast of the island Between 1998 and 2008, along a 30-km coastline transect between Saint Leu and Saint Paul, a total of 1,845 marine turtle sightings were recorded during 146 flights with an ultralight aircraft The mean number of turtle sightings per survey increased significantly between 1998 and 2008, and a variety of sizes were recorded throughout the year Marine turtles were found over coral reef zones and on the outer reef... |
| Tipo: Text |
Palavras-chave: Abundance; Aerial survey; Conservation; Indian Ocean; Marine turtles; Reunion Island. |
| Ano: 2010 |
URL: http://archimer.ifremer.fr/doc/00005/11588/9280.pdf |
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| Ballorain, Katia; Ciccione, Stephane; Bourjea, Jerome; Grizel, Henri; Enstipp, Manfred; Georges, Jean-yves. |
| We investigated the habitat use in green turtles exploiting a 13-ha multispecific seagrass meadow at Mayotte Island, south-western Indian Ocean. A phytoecological survey shows the occurrence of eight seagrass species, dominated by Halodule uninervis and Syringodium isoetifolium, distributed according to four distinct seagrass communities along the depth gradient. Direct underwater censuses show that green turtles occurred all over the meadow. Yet when community relative surface area was taken into account green turtles preferentially frequented the most seaward, biomass-richer S. isoetifolium-dominated community, suggesting that green turtles compensate for their intrinsically nutrient-poor herbivorous diet. Additionally, smaller (\80 cm standard curved... |
| Tipo: Text |
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| Ano: 2010 |
URL: http://archimer.ifremer.fr/doc/00018/12918/10201.pdf |
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