Olive ridley (Lepidochelys olivacea) laying eggs habitat mapping in Penimbangan Beach, Bali Island

Abstract Penimbangan beach is one of the tourist destinations located in Buleleng Regency, Bali Province, Indonesia. This beach is also a nesting place for one of the sea turtle species in Indonesia, which is olive ridley (Lepidochelys olivacea). The problem that exists on the island of Bali today is most of the land in coastal areas were experienced land degradation. This land degradation occurs due to human activities or natural factors, it harms the turtle nesting habitat around the coastal area of Bali Island. Conservation of nesting turtle habitat is needed through spatial analysis using Geographic Information Systems (GIS). This study uses the parameters of sand particle, beach slope, width beach, humidity, and temperature parameter to determine the suitability of the turtle nesting habitat. Penimbangan beach area which is very suitable for turtle nesting locations has an area of 163,45 m2, suitable for laying eggs 4.886,44 m2, and not suitable for laying eggs 10.201,64 m2. The map of the suitability for laying turtle eggs is dominated by areas that are not suitable because the width of the beach is not too long and the humidity is still relatively high.

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Suhu inkubasi, pasir pantai peneluran dan sukses penetasan telur penyu pada sarang semi alami di Pantai Warebar - Yenbekaki Distrik Waigeo Timur, Kabupaten Raja Ampat

Cassowary ◽

10.30862/casssowary.cs.v3.i1.36 ◽

2020 ◽

Vol 3 (1) ◽

pp. 21-31

Author(s):

Aditya P. Tarigan ◽

Ricardo F. Tapilatu ◽

Marthin Matulessy

Keyword(s):

Incubation Temperature ◽

Field Research ◽

Sea Turtle ◽

Hatching Rate ◽

Nest Temperature ◽

Olive Ridley ◽

Eretmochelys Imbricata ◽

Turtle Species ◽

Lepidochelys Olivacea ◽

Sand Temperature

The research took place between May and October 2019, and divided into two stages. The first stage was field research to collect data by identifying turtles, calculating hatching successes, measuring the temperature of the nesting beach and nest temperature of each species of turtle in semi-natural nests at Warebar Beach, Yenbekaki village, East Waigeo Sub District, Raja Ampat. The second stage after the field was conducting an analysis of hatching rate in hatchery, sand temperature and nest temperature for each species of turtle. The species of turtles nesting at Warebar Beach are olive-ridley (Lepidochelys olivacea) and hawksbill (Eretmochelys imbricata) turtles. Based on the measurement results at semi-natural nests, it was obtained that the hatching rate of olive ridley sea turtle was 71.6%±28.3 (X±SD) and hawksbill sea turtle was 59.8%±41.3, the overall mean temperature of nesting beach was 28oC, the mean incubation temperature for both sea turtle species was 31oC.

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Schistosomus Reflexus Syndrome in Olive Ridley Sea Turtles (Lepidochelys olivacea)

Veterinary Pathology ◽

10.1177/0300985816651682 ◽

2016 ◽

Vol 54 (1) ◽

pp. 171-177 ◽

Cited By ~ 3

Author(s):

A. Bárcenas-Ibarra ◽

I. Rojas-Lleonart ◽

R. I. Lozano-Guzmán ◽

A. García-Gasca

Keyword(s):

Congenital Malformations ◽

Sea Turtle ◽

Olive Ridley ◽

Developmental Defects ◽

Mexican Pacific ◽

Turtle Species ◽

Lepidochelys Olivacea ◽

Populations At Risk ◽

Different Types ◽

Nesting Beaches

The olive ridley sea turtle ( Lepidochelys olivacea), considered the most abundant sea turtle species, is listed as vulnerable on the International Union for Conservation of Nature Red List. The most important nesting areas are located in the Eastern Pacific, and congenital malformations have been previously reported in this species. The present study was conducted in a single population at El Verde beach, one of the most important nesting beaches for the species in the northwestern Mexican Pacific. The study was based on embryos that had been incubated in a controlled environment. Schistosomus reflexus syndrome (SRS) was observed in 124 of 20 257 olive ridley embryos (0.6%), comprising 124 of 400 (31%) cases of congenital malformations over a 7-month period. Affected embryos had malformations of the carapace, bridge, or plastron, resulting in exposure of the abdominal or thoracic viscera, as well as spinal malformation and abnormal positioning of limbs adjacent to the head with subsequent ankylosis. SRS phenotypes (although lethal) varied from mild to severe, although most cases were severe. SRS was mostly associated with congenital malformations in the neck (short neck, 80%), tail (anury, 38%), and flippers (different types of dysmelias, 53%). In most cases of severe SRS, ankyloses were present. Documenting these findings could be important to identify the cause of the developmental defects, and identification of the cause of the defects may be of significance to the population and to our efforts to manage this and other populations at risk.

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Biochemical Parameter Analysis of Rescued Olive Ridley Sea Turtles (Lepidochelys olivacea)

Indian Journal of Animal Research ◽

10.18805/ijar.b-4144 ◽

2020 ◽

Author(s):

A. Ramakrishnan ◽

M. Palanivelrajan ◽

D. Sumathi ◽

K. Senthilkumar

Keyword(s):

Biochemical Parameters ◽

Sea Turtles ◽

Sea Turtle ◽

Parameter Analysis ◽

Published Data ◽

Olive Ridley ◽

Turtle Species ◽

Lepidochelys Olivacea ◽

The Pacific ◽

Olive Ridley Sea Turtles

Background: The olive ridley sea turtle also known as the Pacific ridley sea turtle is a medium-sized species of turtle found in warm and tropical waters, primarily in the Pacific and Indian Oceans. Sea Turtles are an integral part of coastal and marine ecosystems, they have also been fundamental to the culture of coastal societies for millennia. But human activities over the past 200 years have massively tipped the scales against the survival of these ancient mariners, despite its conservation status the olive ridley are considered vulnerable. The aim of the study was to collect biochemical data on olive ridley sea turtles while drawing comparisons with previous published data on sea turtles. Methods: This research work was carried out in rescued Olive Ridley Sea Turtles (Lepidochelys olivacea) which were stranded or rescued during various periods of breeding season from September, 2017 to April, 2018 by Trust for Environmental and Education (TREE) foundation, Vettuvankeni, Chennai, Tamil Nadu. The Clinical samples were collected from 7 sea turtles in rescue centers and examined for biochemical parameters analysis. The biochemical parameters measured were Glucose, cholesterol, Total protein, albumin and globulin, Blood Urea Nitrogen (BUN), Creatinine, Alanine Aminotransferase (ALT), Calcium and Phosphorus. The statistical analyses of data were carried out by using student’s t-test. Result: The results of this study were more or less unfailing with previous studies but variations with other studies may result from values depends upon the geospatial distribution such as species, age, sex, season, sample site, nutrition and management condition. The data in this research was more specific to olive ridley sea turtles, indicating need to standardize reference values because of little know data on these turtle species, which are intended for health evaluation for free-ranging and captive/rescued sea turtles.

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Comparative Study of Plasma Parameters in Olive Ridley (Lepidochelys Olivacea) and Hawksbill (Eretmochelys Imbricata) During Nesting

Sultan Qaboos University Journal for Science [SQUJS] ◽

10.24200/squjs.vol7iss2pp231-239 ◽

2002 ◽

Vol 7 (2) ◽

pp. 231

Author(s):

A.Y.A. Alkindi ◽

I.Y. Mahmoud ◽

J.L. Plude

Keyword(s):

Plasma Parameter ◽

Sea Turtles ◽

Stress Hormones ◽

Sea Turtle ◽

Olive Ridley ◽

Plasma Parameters ◽

Eretmochelys Imbricata ◽

Turtle Species ◽

Lepidochelys Olivacea ◽

Significant Difference

The aim of this study is to investigate the role of plasma level parameters during nesting activity and provide data potentially useful to future studies on the dynamics of reproductive and stress hormones in the most endangered sea turtle species in the world. Plasma parameters in the sea turtles, olive ridley (Lipodochelys oliveacea) and hawksbill (Eretmochelys imbricata) from Masirah Island, Oman, were analyzed relative to nesting stress. To date, no study has been conducted on plasma parameter levels in sea turtles during nesting. Field observations were conducted under ideal temperature conditions. At the time of sampling, there was no significant difference for cloacal, sand, air or water temperature for the two species. Electrolytes (Cl¯, Ca++, K+, Na+ and Mg++), cholesterol, urea, uric acid and osmolarity were measured during nesting. Both species were observed to spend between 1.5 and 2.00 hours on the nesting grounds. Some had successful oviposition and completed all nesting phases, while others with incomplete nesting phases failed to oviposit their eggs. Under both conditions, the turtles of both species had an exhaustive and stressful nesting exercise. Plasma parameter values, both intra-specifically and inter-specifically, were not significantly different for oviposited and non-oviposited turtles. This may indicate that both species have the same physiological adjustment relative to plasma parameters whether or not the turtles oviposited their eggs.

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

Phytotaxa ◽

10.11646/phytotaxa.233.3.2 ◽

2015 ◽

Vol 233 (3) ◽

pp. 236 ◽

Cited By ~ 21

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.

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The Olive Ridley Project (ORP): A successful example of how to engage researchers, conservation practitioners and civil society

Research for All ◽

10.14324/rfa.05.2.17 ◽

2021 ◽

Vol 5 (2) ◽

Author(s):

Martin Stelfox ◽

Mercedes Martin-Cereceda ◽

Karim Vahed ◽

Jillian Hudgins ◽

Stephanie Köhnk ◽

...

Keyword(s):

Spatial Ecology ◽

Community Education ◽

Knowledge Exchange ◽

Sustainable Use ◽

Sea Turtle ◽

Marine Turtle ◽

Olive Ridley ◽

Turtle Species ◽

Research Engagement ◽

The Uk

The Olive Ridley Project (ORP) was set up to protect sea turtles and their habitats. The project was formed in 2013, and it became a registered charity in the UK in 2016. From its inception, ORP took a multidisciplinary approach to achieve its goals. Part of its objectives, and the reason why the charity came to fruition, are related to the issue of olive ridley sea turtle (Lepidochelys olivacea) entanglement in abandoned, lost or discarded fishing gear (also known as ‘ghost gear’ or ‘ghost nets’), and the search for ghost gear and turtle entanglement ‘hot spots’ throughout the Indian Ocean. The initial ORP research questions were soon challenged by societal interests to develop inclusive educational programmes in local communities and tourist resorts that could raise awareness about the need for conservation of all sea turtle species. In February 2017, ORP opened the first veterinarian-run, fully equipped Marine Turtle Rescue Centre in the Maldives, bringing together the work of researchers, citizen scientists, volunteers, environmentalists, marine biologists and veterinarians. The present work of ORP sits on a strong and scientifically robust collaborative plan. Current ORP research projects range from sea turtle population analyses, spatial ecology, rehabilitation of injured and sick individuals, epibiont parasite analyses, precise turtle identification through photo-ID research, linking ghost gear to responsible fisheries, and analyses of ghost gear drift patterns. The programme enhances community education and outreach by engaging schoolchildren, organizing workshops, promoting sustainable use of ghost gear waste, and training citizen scientists and local fishing communities. The ORP programme encompasses many principles of research engagement, effectively combining scientific knowledge, education and action. This article explores all stages of the process (from research planning and design, to knowledge exchange and inter- and trans-disciplinary impact assessments), describing the active engagement originated by the ORP initiative. A reflective insight into the learning, enrichment and challenges of engaging researchers and community actors is also included, considering the current social and scientific framework.

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

Veterinární Medicína ◽

10.17221/81/2020-vetmed ◽

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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Expression of aromatase in the embryonic brain of the olive ridley sea turtle (Lepidochelys olivacea), and the effect of bisphenol-A in sexually differentiated embryos

The International Journal of Developmental Biology ◽

10.1387/ijdb.140192ag ◽

2014 ◽

Vol 58 (10-11-12) ◽

pp. 733-741 ◽

Cited By ~ 7

Author(s):

Patsy Gómez-Picos ◽

Itzel Sifuentes-Romero ◽

Horacio Merchant-Larios ◽

Rubí Hernández-Cornejo ◽

Verónica Díaz-Hernández ◽

...

Keyword(s):

Bisphenol A ◽

Sea Turtle ◽

Embryonic Brain ◽

Olive Ridley ◽

Lepidochelys Olivacea

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Study on the etiology of fibropapillomatosis of olive ridley sea turtles (Lepidochelys olivacea) nesting in the National Wildlife Refuge at Ostional, Guanacaste, Costa Rica

Revista Ciencias Marinas y Costeras ◽

10.15359/revmar.5.8 ◽

2013 ◽

Vol 5 ◽

pp. 119 ◽

Cited By ~ 5

Author(s):

Laura Brenes Chaves ◽

Alexis Berrocal ◽

Ana I. Meneses ◽

Carlos Jiménez Sánchez ◽

Carlos M. Orrego Vásquez

Keyword(s):

Sea Turtles ◽

Cytoplasmic Inclusion ◽

Blood Chemistry ◽

Sea Turtle ◽

Olive Ridley ◽

Blood Samples ◽

Lepidochelys Olivacea ◽

Wildlife Refuge ◽

Para Determinar ◽

Olive Ridley Sea Turtles

Sea turtle fibropapillomatosis is an emerging disease characterized by a proliferation of cutaneous papillomas, fibromas, and fibropapillomas and occasional visceral fibromas. This paper aims to contribute tothe etiology of fibropapillomatosis in olive ridley sea turtles (Lepidochelys olivacea) nesting in OstionalNational Wildlife Refuge. Twenty six olive ridley turtles with cutaneous fibropapilloma were sampled and24 healthy olive ridley turtles served as controls. Biopsies were taken of the cutaneous tumors in sick seaturtles, as well as skin biopsies from control subjects, and blood samples were collected from all turtles.Tumorous samples and skin samples were microscopically analyzed in order to differentiate the histologicalfactors resulting from the disease pathogenesis, where the main histological findings were papillaryepidermal hyperplasia, orthokeratotic hyperkeratosis, spirorchid-like eggs in the dermis, and eosinophilic cytoplasmic inclusion. Hematology and blood chemistry studies were conducted on blood samples, andMCHC, heterophils, lymphocytes, monocytes, AST, total protein, albumin and globulin values were significantlydifferent between healthy turtles and turtles with tumors. A PCR test was also conducted in thesamples to determine the presence of herpesvirus and papillomavirus as possible etiologic agents, wherethe papilomavirus was absent in all the samples, while the herpesvirus was present in 69.23% of the tumors,this being the most probable etiological agent of fibropapillomatosis.La fibropapilomatosis de la tortuga marina es una enfermedad emergente caracterizada por múltiples papilomas, fibromas y fibropapilomas cutáneos, así como ocasionales fibromas viscerales. El presente trabajo tiene como objetivo contribuir a la etiología de la fibropapilomatosis en la tortuga lora (Lepidochelys olivacea) que anida en el Refugio Nacional de Vida Silvestre Ostional. Se muestrearon 26 tortugas lora con fibropapilomas cutáneos y 24 tortugas lora sanas que sirvieron de control. Se tomaron biopsias excisionales de los tumores cutáneos de las tortugas enfermas y biopsias de piel de las tortugas control, además se recolectaron muestras de sangre de todas las tortugas. Las muestras tumorales y de piel se analizaron microscópicamente para diferenciar los factores histológicos que resultan de la patogénesis de la enfermedad, donde los hallazgos histopatológicos principales en los fibropapilomas fueron: crecimiento papiliforme, hiperqueratosis ortoqueratótica, huevos de parásitos similares a espiróquidos en la capa dérmica e inclusión eosinofílica citoplasmática. A las muestras de sangre se les realizó análisis hematológico y de química sanguínea, donde los valores de CHCM, heterófilos, linfocitos, monocitos, AST, proteínas totales, albúmina y globulinas resultaron significativamente diferentes entre las tortugas sanas y las tortugas con tumores. Se realizó PCR a las muestras para determinar la presencia de genoma de herpesvirus y papilomavirus como posibles agentes etiológicos, donde el papilomavirus estuvo ausente en la totalidad de las muestras, mientras el virus Herpes se presentó en el 69.23% de los tumores posicionándose como el posible agente etiológico de la enfermedad.

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