scholarly journals Ultralight aircraft surveys reveal marine turtle population increases along the west coast of Reunion Island

Oryx ◽  
2010 ◽  
Vol 44 (2) ◽  
pp. 223-229 ◽  
Author(s):  
Claire Jean ◽  
Stéphane Ciccione ◽  
Katia Ballorain ◽  
Jean-Yves Georges ◽  
Jérôme Bourjea
Keyword(s):  
West Coast ◽  
Marine Protected Area ◽  
Saint Paul ◽  
Marine Turtle ◽  
Reunion Island ◽  
The West ◽  
Outer Reef ◽  
Marine Turtles ◽  
South West Indian Ocean ◽  
Réunion Island

AbstractReunion 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 slopes. Spatial distribution may be linked to the topography and substrate of the bottom, which determine the availability of food and shelter. The marine protected area located off Saint Paul seems to have benefited marine turtles as they frequent this area more than other regions on the west coast. These results are encouraging for local organizations working for the conservation of marine turtles on Reunion Island.

Seasonal variability of bull and tiger shark presence on the west coast of Reunion Island, western Indian Ocean

2015 ◽  
Vol 37 (2) ◽  
pp. 199-208 ◽  
Author(s):  
A Blaison ◽  
S Jaquemet ◽  
D Guyomard ◽  
G Vangrevelynghe ◽  
T Gazzo ◽  
...  
Keyword(s):  
Indian Ocean ◽  
West Coast ◽  
Seasonal Variability ◽  
Western Indian Ocean ◽  
Tiger Shark ◽  
Reunion Island ◽  
The West ◽  
Réunion Island

scholarly journals Social acceptability of a marine protected area: The case of Reunion Island

2010 ◽  
Vol 53 (4) ◽  
pp. 169-179 ◽  
Author(s):  
Aurélie Thomassin ◽  
Carole S. White ◽  
Selina S. Stead ◽  
Gilbert David
Keyword(s):  
Protected Area ◽  
Marine Protected Area ◽  
Social Acceptability ◽  
Reunion Island ◽  
Réunion Island

scholarly journals Placing Madagascar's marine turtle populations in a regional context using community-based monitoring

Oryx ◽  
2016 ◽  
Vol 51 (3) ◽  
pp. 542-553 ◽  
Author(s):  
Frances Humber ◽  
Brendan J. Godley ◽  
Tanguy Nicolas ◽  
Olivier Raynaud ◽  
Florence Pichon ◽  
...  
Keyword(s):  
Western Indian Ocean ◽  
Marine Turtle ◽  
Current Status ◽  
The West ◽  
Community Based ◽  
Building Capacity ◽  
Marine Turtles ◽  
Nesting Sites ◽  
The Status ◽  
Nesting Aggregation

AbstractMadagascar is an important foraging ground for marine turtles in the Western Indian Ocean, yet the status of the country's nesting aggregations remains poorly documented. We assess the current status and trend in nesting throughout Madagascar, including data recorded by a community-based monitoring project in the Barren Isles (western Madagascar). We contextualize the findings in comparison with data from Madagascar's closest neighbouring states. Reports indicate that nesting levels have declined at many coastal sites, with no known recordings since 2000 at > 40 nesting sites. We estimate there are a minimum of 1,200 nests per year in Madagascar, with the largest recorded nesting aggregation (< 1,000 nests per year) found on islands off the west and northern coasts. The majority of nesting aggregations, including those recorded by the community-based monitoring project in the Barren Isles, are relatively small, in the order of < 50 nests per year, yet they are potentially important sources of regional genetic diversity. Nesting on many of the islands (e.g. Tromelin, Europa) around Madagascar has increased over the last 20 years, despite the fact that thousands of turtles probably originating from these sites are taken by fishers in the waters of Madagascar annually. We discuss the importance of protecting small nesting populations, and how community-based monitoring could be an important tool for conserving remote and vulnerable populations and building capacity for natural resource management.

scholarly journals Instability of the NS1 Glycoprotein from La Reunion 2018 Dengue 2 Virus (Cosmopolitan-1 Genotype) in Huh7 Cells Is Due to Lysine Residues on Positions 272 and 324

2021 ◽  
Vol 22 (4) ◽  
pp. 1951
Author(s):  
Eva Ogire ◽  
Olivier Diaz ◽  
Pierre-Olivier Vidalain ◽  
Vincent Lotteau ◽  
Philippe Desprès ◽  
...  
Keyword(s):  
Clinical Manifestations ◽  
Severe Dengue ◽  
Reunion Island ◽  
La Réunion ◽  
South West Indian Ocean ◽  
Huh7 Cells ◽  
Virus Serotype ◽  
Lysine Residues ◽  
Réunion Island ◽  
La Réunion Island

La Reunion island in the South West Indian Ocean is now endemic for dengue following the introduction of dengue virus serotype 2 (DENV-2) cosmopolitan-I genotype in 2017. DENV-2 infection causes a wide spectrum of clinical manifestations ranging from flu-like disease to severe dengue. The nonstructural glycoprotein 1 (NS1) has been identified as playing a key role in dengue disease severity. The intracellular NS1 exists as a homodimer, whereas a fraction is driven towards the plasma membrane or released as a soluble hexameric protein. Here, we characterized the NS1 glycoproteins from clinical isolates DES-14 and RUN-18 that were collected during the DENV-2 epidemics in Tanzania in 2014 and La Reunion island in 2018, respectively. In relation to hepatotropism of the DENV, expression of recombinant DES-14 NS1 and RUN-18 NS1 glycoproteins was compared in human hepatoma Huh7 cells. We observed that RUN-18 NS1 was poorly stable in Huh7 cells compared to DES-14 NS1. The instability of RUN-18 NS1 leading to a low level of NS1 secretion mostly relates to lysine residues on positions 272 and 324. Our data raise the issue of the consequences of a defect in NS1 stability in human hepatocytes in relation to the major role of NS1 in the pathogenesis of the DENV-2 infection.

Corrigendum to “Human-shark interactions: The case study of Reunion island in the south-west Indian Ocean”[Ocean Coast. Manag. 136C (2016) 73–82]

2018 ◽  
Vol 163 ◽  
pp. 537
Author(s):  
Anne Lemahieu ◽  
Antonin Blaison ◽  
Estelle Crochelet ◽  
Geoffrey Bertrand ◽  
Gwenaëlle Pennober ◽  
...  
Keyword(s):  
Indian Ocean ◽  
West Indian ◽  
Reunion Island ◽  
The South ◽  
South West Indian Ocean ◽  
South West ◽  
Réunion Island ◽  
West Indian Ocean

scholarly journals Chikungunya Fever: A Clinical and Virological Investigation of Outpatients on Reunion Island, South-West Indian Ocean

2013 ◽  
Vol 7 (1) ◽  
pp. e2004 ◽  
Author(s):  
Simon-Djamel Thiberville ◽  
Veronique Boisson ◽  
Jean Gaudart ◽  
Fabrice Simon ◽  
Antoine Flahault ◽  
...  
Keyword(s):  
Indian Ocean ◽  
West Indian ◽  
Reunion Island ◽  
Chikungunya Fever ◽  
South West Indian Ocean ◽  
South West ◽  
Réunion Island ◽  
West Indian Ocean

Human-shark interactions: The case study of Reunion island in the south-west Indian Ocean

2017 ◽  
Vol 136 ◽  
pp. 73-82 ◽  
Author(s):  
Anne Lemahieu ◽  
Antonin Blaison ◽  
Estelle Crochelet ◽  
Geoffrey Bertrand ◽  
Gwenaëlle Pennober ◽  
...  
Keyword(s):  
Indian Ocean ◽  
West Indian ◽  
Reunion Island ◽  
The South ◽  
South West Indian Ocean ◽  
South West ◽  
Réunion Island ◽  
West Indian Ocean

scholarly journals Tsunami hazard in La Réunion island from numerical modeling of historical events

2013 ◽  
Vol 1 (3) ◽  
pp. 1823-1855
Author(s):  
E. Quentel ◽  
A. Loevenbruck ◽  
H. Hébert ◽  
S. Allgeyer
Keyword(s):  
Numerical Modeling ◽  
Saint Paul ◽  
Tsunami Hazard ◽  
Reunion Island ◽  
La Réunion ◽  
Historical Events ◽  
Réunion Island ◽  
Wave Heights ◽  
La Réunion Island ◽  
The Impact

Abstract. Whereas major tsunamis have recently affected the southwest Indian Ocean, tsunami hazard in this basin has never been thoroughly examined. Our study contributes to fill in this lack and focuses on La Réunion island for which tsunami hazard related to great earthquakes is evaluated by modeling the scenarios of major historical events. Then, our numerical modeling allow us to compare the tsunami impact at regional scale according to the seismic sources; we thus identify earthquakes locations which most affect the island and describe the impact distribution along its coastline. Thirdly, detailed models are performed for selected sites based on high resolution bathymetric and topographic data; they provide estimations of the water currents, wave heights and potential inundations. When available, field measurements and tide records allow testing our models. Arrival time, amplitude of the first wave and impact on the tide gauge time series are well reproduced. Models are consistent with the observations. The west coast of La Réunion is the most affected (to 2.7 m in the harbour of Le Port Est for 2004 event) by transoceanic tsunamis. Numerical modeling has been performed at Saint-Paul for the 2004 Sumatra-Andaman event and 1833 Sumatra event; the low topography of this town could make it vulnerable to tsunami waves. Harbours, particularly prone to undergo significant damages, are also examined. Outside the harbours as well as at Saint-Paul, inundations are predicted along the coastline due to important local wave heights (> 2.5 m).

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