scholarly journals Scapteriscus didactylus (Orthoptera, Gryllotalpidae), predator of leatherback turtle eggs in French Guiana

2003 ◽  
Vol 249 ◽  
pp. 289-296 ◽  
Author(s):  
A Maros ◽  
A Louveaux ◽  
MH Godfrey ◽  
M Girondot
Keyword(s):  
French Guiana ◽  
Leatherback Turtle

Influence of nest location and yolkless eggs on the hatching success of leatherback turtle clutches in French Guiana

2006 ◽  
Vol 84 (6) ◽  
pp. 908-915 ◽  
Author(s):  
Stéphane Caut ◽  
Elodie Guirlet ◽  
Pascal Jouquet ◽  
Marc Girondot
Keyword(s):  
Site Selection ◽  
Egg Production ◽  
French Guiana ◽  
Nest Site ◽  
Hatching Success ◽  
Predation Rate ◽  
Nest Site Selection ◽  
Leatherback Turtles ◽  
Nest Location ◽  
Leatherback Turtle

The hatching success of leatherback turtles, Dermochelys coriacea (Vandelli, 1761), is influenced by heterogeneously distributed ecological factors. However, the hatching success according to nest-site selection has rarely been studied and little is known about the role of nest-site selection and infertile (yolkless) egg production on the predation rate and development of fertile eggs in leatherback turtle nests laid in French Guiana. A field study of 99 leatherback turtle nests was conducted to quantify the relationships between hatching success and (i) the nest-site selection (i.e., vegetation line, sea tide line) and (ii) the infertile eggs, especially their state after incubation (i.e., hydrated or dehydrated) and their effects on predation rate. We found that hatching success on this beach was very low (38.2%). This study illustrates that nest-site selection influences the predation rate and the dehydration of yolkless eggs, while the production of yolkless eggs by leatherback turtles has consequences on nest success. The proportion of yolkless eggs in the clutch, as well as their status at the end of incubation (hydrated or not, preyed upon), correlates with predation rate, development of yolked eggs, and hatching success. There was a significant relationship between nest location (relative to high tide line and vegetation line) and both the predation rates of eggs and the percentage of dehydrated yolkless eggs within a clutch. The production of yolkless eggs was related to hatching success and supports the hypothesis that yolkless eggs have a positive effect on the future of the clutch.

Thermal and trophic habitats of the leatherback turtle during the nesting season in French Guiana

2009 ◽  
Vol 378 (1-2) ◽  
pp. 8-14 ◽  
Author(s):  
Sabrina Fossette ◽  
Charlotte Girard ◽  
Thomas Bastian ◽  
Beatriz Calmettes ◽  
Sandra Ferraroli ◽  
...  
Keyword(s):  
French Guiana ◽  
Leatherback Turtle ◽  
Nesting Season

scholarly journals Survival and breeding interval of an endangered marine vertebrate, the leatherback turtle Dermochelys coriacea, in French Guiana

2020 ◽  
Vol 41 ◽  
pp. 153-165 ◽  
Author(s):  
D Chevallier ◽  
M Girondot ◽  
R Berzins ◽  
J Chevalier ◽  
B de Thoisy ◽  
...  
Keyword(s):  
Life Cycle ◽  
French Guiana ◽  
Sea Turtles ◽  
Monitoring Program ◽  
Biological Information ◽  
Dermochelys Coriacea ◽  
Adult Survival ◽  
Leatherback Turtle ◽  
State Uncertainty ◽  
Intermittent Sampling

In the context of global change, endangered species such as sea turtles undergo strong population dynamics changes. Understanding demographic processes inducing such changes is critical for developing appropriate measures for conservation and management. Nesting females of the French Guiana population of leatherback sea turtles Dermochelys coriacea represented 40% of the world’s total in 2001; today, they represent only 10%. Here, we analyze data from the long-term monitoring program of leatherbacks in French Guiana, based on 28 yr of capture-mark-recapture data from 46051 individuals in northwestern French Guiana. We used multievent models (multistate capture-recapture models with state uncertainty) to represent the main peculiarity of the life cycle, intermittent reproduction, and to take advantage of the use of several different types of marks to account for mark loss and incomplete detection. The average annual adult survival probability (mean ± SE) 0.789 ± 0.009 is low compared to published estimates for this species. By combining the estimates of departure and return probabilities, we provide an estimate of the interval among laying seasons equal to 2.777 ± 0.118 yr, which matches previous findings. Taking survival into account, this interval translates into an average of 1.704 ± 0.034 further reproductive seasons for an adult female having just bred, which is remarkably low compared to other long-lived vertebrates. The representation of the life cycle and mark loss in our models provides a sound structure for broader and richer analyses to extract biological information from marked individuals and offers an invaluable source of demographic information on leatherbacks, a species for which only a small segment of the population is accessible to intermittent sampling.

Plastic Debris in a Nesting Leatherback Turtle in French Guiana

2010 ◽  
Vol 9 (2) ◽  
pp. 267-270 ◽  
Author(s):  
Virginie Plot ◽  
Jean-Yves Georges
Keyword(s):  
French Guiana ◽  
Leatherback Turtle ◽  
Plastic Debris

Inside and outside the Neotropics: three Polish naturalists during the late nineteenth and early twentieth centuries

2017 ◽  
Vol 44 (1) ◽  
pp. 151-158 ◽  
Author(s):  
D. Mierzwa-Szymkowiak ◽  
A. S. H. Breure
Keyword(s):  
French Guiana ◽  
Large Collection ◽  
Late Nineteenth

Władysław Emanuel Lubomirski (1824–1882) was a Polish amateur naturalist who amassed a large collection of molluscs; this included specimens, partly collected by Konstanty Roman Jelski (1837–1896) and Jan Stanisław Sztolcman (Stolzmann) (1854–1928) in the Neotropics. Jelski travelled through French Guiana and Peru between 1865 and 1879. Sztolcman joined him in 1875 and worked in Peru and Ecuador until 1881.

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