Biology and Management of Olive Ridley Turtles (Lepidochelys olivacea) in Central America

2021 ◽  
Author(s):  
Carlos Mario V. Orrego
Keyword(s):  
Central America ◽  
Olive Ridley ◽  
Lepidochelys Olivacea

Essential and trace metals in a post-nesting olive ridley turtles (Lepidochelys olivacea) in Ceuta beach, Sinaloa, Mexico

2021 ◽  
Author(s):  
Vicente Olimón-Andalón ◽  
Jorge Valdés-Flores ◽  
Cesar Paul Ley-Quiñonez ◽  
Alan A. Zavala-Norzagaray ◽  
A. Alonso Aguirre ◽  
...  
Keyword(s):  
Trace Metals ◽  
Olive Ridley ◽  
Lepidochelys Olivacea

Rearing the Olive ridley Lepidochelys olivacea in artificial sea water

2007 ◽  
Vol 26 (1) ◽  
pp. 90-94
Author(s):  
S. PAULRAJ ◽  
S. SUBBARAYALU NAIDU ◽  
J. PAKKIARAJ
Keyword(s):  
Sea Water ◽  
Olive Ridley ◽  
Lepidochelys Olivacea

scholarly journals Chelonicola and Poulinea, two new gomphonemoid diatom genera (Bacillariophyta) living on marine turtles from Costa Rica

Phytotaxa ◽  
2015 ◽  
Vol 233 (3) ◽  
pp. 236 ◽  
Author(s):  
Roksana Majewska ◽  
J. P. Kociolek ◽  
Evan W. Thomas ◽  
Mario De Stefano ◽  
Mario Santoro ◽  
...  
Keyword(s):  
Costa Rica ◽  
Marine Mammals ◽  
Sea Turtles ◽  
Sea Turtle ◽  
New Genera ◽  
Olive Ridley ◽  
Lepidochelys Olivacea ◽  
Marine Turtles ◽  
The Family ◽  
Long Time

Marine mammals such as whales and dolphins have been known for a long time to host a very specific epizoic community on their skin. Less known however is the presence of a similar community on the carapaces of sea turtles. The present study is the first describing new taxa inhabiting sea turtle carapaces. Samples, collected from nesting olive ridley sea turtles (Lepidochelys olivacea) on Ostional Beach (Costa Rica), were studied using light and scanning electron microscopy. Two unknown small-celled gomphonemoid taxa were analysed in more detail and are described as two new genera, closely related to other gomphonemoid genera with septate girdle bands, such as Tripterion, Cuneolus and Gomphoseptatum. Chelonicola Majewska, De Stefano & Van de Vijver gen. nov. has a flat valve face, uniseriate striae composed of more than three areolae, simple external raphe endings, internally a siliceous flap over the proximal raphe endings and lives on mucilaginous stalks. Poulinea Majewska, De Stefano & Van de Vijver gen. nov. has at least one concave valve, uniseriate striae composed of only two elongated areolae, external distal raphe endings covered by thickened siliceous flaps and lives attached to the substrate by a mucilaginous pad. Chelonicola costaricensis Majewska, De Stefano & Van de Vijver sp. nov. and Poulinea lepidochelicola Majewska, De Stefano & Van de Vijver sp. nov. can be separated based on stria structure, girdle structure composed of more than 10 copulae, raphe structure and general valve outline. A cladistics analysis of putative members of the Rhoicospheniaceae indicates that the family is polyphyletic. Chelonicola and Poulinea are sister taxa, and form a monophyletic group with Cuneolus and Tripterion, but are not closely related to Rhoicosphenia, or other genera previously assigned to this family. Features used to help diagnose the family such as symmetry and presence of septa and pseudosepta are homoplastic across the raphid diatom tree of life.

Effect of Hatchery Nest Environment on Olive Ridley (Lepidochelys olivacea) Hatchling Performance

2021 ◽  
Vol 20 (1) ◽  
Author(s):  
Chandana Pusapati ◽  
Muralidharan Manoharakrishnan ◽  
Andrea D. Phillott ◽  
Kartik Shanker
Keyword(s):  
Olive Ridley ◽  
Lepidochelys Olivacea

scholarly journals Hatching Success Rather Than Temperature-Dependent Sex Determination as the Main Driver of Olive Ridley (Lepidochelys olivacea) Nesting Activity in the Pacific Coast of Central America

Animals ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 3168
Author(s):  
Alejandra Morales Mérida ◽  
Aude Helier ◽  
Adriana A. Cortés-Gómez ◽  
Marc Girondot
Keyword(s):  
Solar Radiation ◽  
Central America ◽  
Pacific Coast ◽  
Hatching Success ◽  
Temperature Dependent ◽  
Lepidochelys Olivacea ◽  
Marine Turtles ◽  
The Pacific ◽  
Main Driver ◽  
Nesting Activity

In marine turtles, sex is determined during a precise period during incubation: males are produced at lower temperatures and females at higher temperatures, a phenomenon called temperature-dependent sex determination. Nest temperature depends on many factors, including solar radiation. Albedo is the measure of the proportion of reflected solar radiation, and in terms of sand color, black sand absorbs the most energy, while white sand reflects more solar radiation. Based on this observation, darker sand beaches with higher temperatures should produce more females. As marine turtles show a high degree of philopatry, including natal homing, dark beaches should also produce more female hatchlings that return to nest when mature. When sand color is heterogeneous in a region, we hypothesize that darker beaches would have the most nests. Nevertheless, the high incubation temperature on beaches with a low albedo may result in low hatching success. Using Google Earth images and the SWOT database of nesting olive ridleys (Lepidochelys olivacea) in the Pacific coast of Mexico and Central America, we modeled sand color and nesting activity to test the hypothesis that darker beaches host larger concentrations of females because of feminization on darker beaches and female philopatry. We found the opposite result: the lower hatching success at beaches with a lower albedo could be the main driver of nesting activity heterogeneity for olive ridleys in Central America.

Status of Olive Ridley Sea Turtles (Lepidochelys olivacea) After 29 Years of Nesting Rookery Conservation in Nayarit and Bahía de Banderas, Mexico

2018 ◽  
Vol 17 (1) ◽  
pp. 27-36
Author(s):  
Catherine E. Hart ◽  
Adrián Maldonado-Gasca ◽  
César P. Ley-Quiñonez ◽  
Miguel Flores-Peregrina ◽  
Jose de Jesús Romero-Villarruel ◽  
...  
Keyword(s):  
Sea Turtles ◽  
Olive Ridley ◽  
Lepidochelys Olivacea ◽  
Olive Ridley Sea Turtles

Successful rehabilitation of an oiled sea turtle (Lepidochelys olivacea) affected by the biggest oil spill disaster in Brazil

2021 ◽  
Author(s):  
REM Oliveira ◽  
FLN Attademo ◽  
JS Galvincio ◽  
ACB Freire ◽  
AS Silva ◽  
...  
Keyword(s):  
Oil Spills ◽  
Sea Turtle ◽  
Entire Body ◽  
Normal Range ◽  
Olive Ridley ◽  
Lepidochelys Olivacea ◽  
Second Stage ◽  
Therapeutic Protocol ◽  
Mucous Membranes ◽  
Therapeutic Procedures

The standardisation of protocols and discussion of therapeutic procedures in the rehabilitation of turtles affected by oil spills are necessary to optimise the recovery time and increase the chances of survival of these animals. This study aimed at reporting the processes adopted for the stabilisation, decontamination, rehabilitation and release of an oiled olive ridley sea turtle (Lepidochelys olivacea), rescued alive on September 23, 2019, at Santa Rita Beach, Extremoz municipality, Rio Grande do Norte, Brazil. Its entire body was covered by oil. At first, the animal was mechanically dry cleaned using a gauze soaked in mineral oil in the keratinised regions (carapace and plastron) and a gauze soaked in vegetable oil was used on the oral, nasal, ocular, and cloacal mucous membranes. The second stage of the oil removal consisted of washing the animal with heated pressurised water (39 °C) and a neutral detergent using a soft foam sponge. The animal received treatment with antitoxins, antibiotics, analgesics, gastrointestinal protectors, and fluid therapy. After 7 days of treatment, the blood count showed that all the parameters were within the normal range. The oil cleaning process and the therapeutic protocol used in the rehabilitation of the olive ridley sea turtle were efficient.

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