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Dissertations / Theses on the topic 'Dermochelys'

Author: Grafiati

Published: 3 June 2025

Last updated: 31 July 2025

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1

Jones, Timothy Todd. "Energetics of the leatherback turtle, Dermochelys coriacea." Thesis, University of British Columbia, 2009. http://hdl.handle.net/2429/7454.

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I have quantified the energy requirements of leatherback turtles (Dermochelys coriacea) throughout development, and examined growth rates, resource requirement and availability, and anthropogenic threats from the commercial fishery. I demonstrated that the use of the doubly labeled water (DLW) method to determine field metabolic rate in marine turtles is constrained by low metabolic (MR) and high water turnover rates (Chapter 2). For fed and fasted turtles, water turnover rates were 9.57±1.33% and 6.14±0.65% TBW day−¹1 and MR (from respirometry) was 28.66±5.31 kJ kg−¹ day−¹ and 13.77±1.49 kJ

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2

Bostrom, Brian Lee. "Thermoregulation in the leatherback sea turtle (Dermochelys coriacea)." Thesis, University of British Columbia, 2009. http://hdl.handle.net/2429/12666.

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Adult leatherback turtles (Dermochelys coriacea) exhibit thermal gradients between their bodies and the environment of ≥ 8 °C in sub-polar waters and ≤ 4 °C in the tropics. There has been no direct evidence for thermoregulation in leatherbacks although modelling and morphological studies have given an indication of how thermoregulation may be achieved. Using a cylindrical model of a leatherback I investigated the extent to which heat production by muscle activity during variation of swim speed could be used in a leatherback’s thermal strategy. Drag force of a full scale cast of a leatherbac

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3

Wallace, Bryan Patrick Spotila James R. "The bioenergetics and trophic ecology of leatherback turtles (Dermochelys coriacea) /." Philadelphia, Pa. : Drexel University, 2005. http://dspace.library.drexel.edu/handle/1860/513.

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4

Tomillo, Maria del Pilar Santidrián Spotila James R. "Factors affecting population dynamics of eastern pacific leatherback turtles (Dermochelys coriacea) /." Philadelphia, Pa. : Drexel University, 2007. http://hdl.handle.net/1860/2523.

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5

Rivalan, Philippe. "La dynamique des populations de tortues luths de Guyane française : recherche des facteurs impliqués et application à la mise en place de stratégies de conservation." Paris 11, 2004. http://www.theses.fr/2004PA112004.

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La connaissance de la dynamique d'une population est un préliminaire indispensable à la mise en place de stratégies de conservation raisonnées. Dans le cas de la tortue luth (Dermochelys coriacea), la connaissance de la dynamique des populations est encore très fragmentaire en raison de la difficulté d'accès aux individus, tant sur le plan spatial que temporel. Or, face à la chute des effectifs de femelles sur de nombreux sites de pontes du Pacifique, la mise en place de mesure de conservation semble urgente. Nous avons donc étudié les facteurs impliqués dans la dynamique des populations des t

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6

Fossette, Sabrina. "Ecologie de la tortue luth, Dermochelys coriacea, en relation avec les conditions océanographiques en Atlantique." Université Louis Pasteur (Strasbourg) (1971-2008), 2008. http://www.theses.fr/2008STR13015.

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7

de, Wet Anje. "Factors affecting survivorship of loggerhead (Caretta caretta) and leatherback (Dermochelys coriacea) sea turtles of South Africa." Thesis, Nelson Mandela Metropolitan University, 2012. http://hdl.handle.net/10948/d1007900.

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Loggerhead (Caretta caretta) and leatherback (Dermochelys coriacea) sea turtles as well as their eggs and hatchlings have been protected on their nesting beach in South Africa (SA) since 1963. Both nesting populations were expected to show similar trends in recovery following the application of identical protection and conservation measures. The loggerhead nesting population has responded favourably to these protection efforts. In contrast, the leatherback nesting population showed an initial increase but is currently stable. The reason for this difference in response is thought to be due to d

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8

Saba, Vincent Sellitto. "Bottom-up and climatic forcing on the nesting and foraging ecology of leatherback turtles (Dermochelys coriacea)." W&M ScholarWorks, 2007. http://www.vims.edu/library/Theses/Saba07.pdf.

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9

Wright, Ruth Vivienne. "Loggerhead (Caretta caretta) and Leatherback (Dermochelys coriacea) nesting activity along the Maputaland coast (South Africa) : 1965 - 2002." Master's thesis, University of Cape Town, 2004. http://hdl.handle.net/11427/6442.

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Includes bibliographical references (leaves 59-63).<br>From 1963 until the present, loggerhead (Caretta caretta) and leatherback (Dermochelys coriacea) female turtles nesting on a 56-km stretch of beach in Maputaland, on the northeast coast of KwaZulu-Natal, South Africa have been tagged and monitored. In this study, population trends, size, preference for timing of nesting and nesting sites, and seasonality in nesting activity and nesting area were analysed and the effectiveness and efficiency of the monitoring programme assessed. Since the programme's inception, approximately 46893 loggerhea

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10

Tucek, Jenny Bianka. "Comparison of the population growth potential of South African loggerhead (Caretta caretta) and leatherback (Dermochelys coriacea) sea turtles." Thesis, Nelson Mandela Metropolitan University, 2014. http://hdl.handle.net/10948/5032.

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A beach conservation programme protecting nesting loggerhead (Caretta caretta) and leatherback (Dermochelys coriacea) sea turtles in South Africa was started in 1963. As initial numbers of nesting females were low for both species (107 loggerheads and 24 leatherbacks) it was proposed that the protection of eggs, hatchlings and nesting females along the nesting beach would induce population growth and prohibit local extinction. Today, 50 years later, the loggerhead population exceeds 650 females per annum, whereas the leatherback population counts about 65 nesting females per year. The trend fo

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11

Rimblot-Baly, Frédérique. "Contribution à la biologie du développement et de la reproduction chez la tortue luth (dermochelys coriacea, vandelli, 1761)." Paris 11, 1991. http://www.theses.fr/1991PA112060.

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Le développement embryonnaire de la tortue luth, compare à celui d'autres tortues, montre une grande homogénéité de l'ordre des chéloniens, tout en révélant quelques particularités sur la structure et l'évolution de la région branchiale, la formation et le développement de la carapace et des membres. La formule chromosomique (2n=56), identique à celle des autres tortues marines, peut être considérée comme primitive pour les tortues cryptodires. La différenciation sexuelle des gonades est influencée par la température d'incubation des œufs. La température pivot est de 29,5#oc; au-dessous, tous

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12

Rimblot-Baly, Frédérique. "Influence de la température sur la différenciation sexuelle, en incubation artificielle et naturelle, chez la tortue Luth, Dermochelys coriacea." Grenoble 2 : ANRT, 1987. http://catalogue.bnf.fr/ark:/12148/cb37602974w.

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13

Rosendal, Erik. "Jaguar (Panthera onca) activity on the beach of Tortuguero National Park, Costa Rica." Thesis, Linköpings universitet, Institutionen för fysik, kemi och biologi, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-69534.

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The jaguars (Panthera onca) of Tortuguero National Park, Costa Rica, sometimes kills and eats green sea turtles (Chelonia mydas), they also, though less often, kill and eat leatherback sea turtles (Dermochelys coriacea). The three species are considered endangered and are listed in CITES. It was the aim of this study to find out more about the jaguars behaviour in the area. To discern any patterns of jaguar and turtle activity on the beach the number of tracks per eighth of a mile was recorded on a daily basis for 26 days and then analyzed. It was also considered to be of interest to determine

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14

Mendilaharsu, Maria de los Milagros López. "Rotas migratórias, áreas de uso intenso e padrões de mergulho de tartarugas-de couro (Dermochelys coriacea) no Atlântico Sul Ocidental." Universidade do Estado do Rio de Janeiro, 2011. http://www.bdtd.uerj.br/tde_busca/arquivo.php?codArquivo=3128.

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior<br>As tartarugas marinhas são espécies ameaçadas, altamente migratórias que apresentam um ciclo de vida longo e uma ampla distribuição geográfica. Assim, melhorar a nossa compreensão sobre a ecologia espacial das tartarugas marinhas é essencial para a elucidação de aspectos da sua história de vida e para o desenvolvimento de medidas eficazes de conservação. Esta tese compreende um conjunto de artigos ou capítulos que visam contribuir ao conhecimento da ecologia espacial da tartaruga-de-couro, Dermochelys coriacea. Este estudo utilizou

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15

Guirlet, Elodie. "Etude des facteurs écologiques et écotoxicologiques impliqués dans la réussite d’incubation chez la tortue luth Dermochelys coriacea de Guyane Française." Paris 11, 2008. http://www.theses.fr/2008PA112108.

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La tortue luth, Dermochelys coriacea, présente une réussite d’incubation relativement faible en comparaison aux autres espèces de tortues marines. Ce faible taux a été attribué à une mortalité embryonnaire accrue plutôt qu’à une infertilité, mais les causes spécifiques de cette mortalité restent peu connues. Les espèces longévives, comme la luth, sont plutôt vulnérables à une mortalité adulte élevée, qui peut entraîner d’importants déclins des effectifs. Cependant, sur le long terme, un faible recrutement des juvéniles peut aussi considérablement jouer sur la dynamique d’une population. A Yali

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16

Botha, Marié. "Nest site fidelity and nest site selection of loggerhead, Caretta Caretta, and leatherback, dermochelys coriacea, turtles in KwaZulu-Natal, South Africa." Thesis, Nelson Mandela Metropolitan University, 2010. http://hdl.handle.net/10948/1233.

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Loggerhead and leatherback sea turtles nest on the beaches of the north-eastern portion of Kwazulu-Natal within the iSimangaliso Wetland Park. Loggerheads place ~60 percent of all nests within an 8 km stretch of beach, whereas leatherbacks tend to space their nests more evenly along the entire length of the monitoring area. The study aimed to determine nest site fidelity of loggerheads and leatherbacks (using four decades of nesting data housed by Ezemvelo KZN Wildlife) and the factors that influence nest site selection of both species within the 56 km of turtle monitoring area (32N to 100S) a

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17

Caderas, Jenna. "Beach Nourishment: Effects on the Hatching & Emergence Success Rates of Leatherback (Dermochelys coriacea), Loggerhead (Caretta caretta), and Green (Chelonia mydas) Sea Turtles." NSUWorks, 2016. http://nsuworks.nova.edu/occ_stuetd/417.

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Broward County, Florida is a popular tourism destination. Due to its popularity, much of the shoreline has been modified and natural habitats were replaced with infrastructure such as houses, condominiums, resorts, and restaurants. The same Broward County beaches utilized by tourists and residents are important for three species of nesting sea turtles, including the Leatherback, Dermochelys coriacea, Loggerhead, Caretta caretta, and Green, Chelonia mydas, Turtles. The Broward County Sea Turtle Conservation Program (BCSTCP) collects yearly data in order to study these endangered reptiles. Incre

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18

James, Michael Charles. "Distribution of the leatherback turtle, Dermochelys coriacea, in Atlantic Canada, evidence from an observer program, aerial surveys, and a volunteer network of fish harvesters." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape2/PQDD_0028/MQ51997.pdf.

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19

Marcon, Melissa Cunha Cajueiro. "Padrões espaço-temporais da captura acidental das tartarugas marinhas Dermochelys coriacea e Caretta caretta pela pesca com espinhel pelágico na região Sudeste/Sul do Brasil." Universidade de São Paulo, 2013. http://www.teses.usp.br/teses/disponiveis/21/21134/tde-09042014-192244/.

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A interação das tartarugas marinhas da espécie Caretta caretta e Dermochelys coriacea com o espinhel pelágico é um dos fatores que mais causa a mortalidade destes animais no oceano. Estudos com o intuito de quantificar essa interação, bem como os fatores que influenciam a mesma, são crescentes, para os quais é necessário conhecer a distribuição dos animais, e correlacioná-la com variáveis ambientais e operacionais da pesca. O presente estudo visa avaliar e quantificar os padrões espaço-temporais das capturas acidentais das tartarugas marinhas C. caretta e D. coriacea na região Sudeste/Sul do B

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20

Rogers, Micah Marie. "Hatchling sex ratios and nest temperature-sex ratio response of three South Florida marine turtle species (Caretta caretta L., Chelonia mydas L., and Dermochelys coriacea V.)." Thesis, Florida Atlantic University, 2013. http://pqdtopen.proquest.com/#viewpdf?dispub=1523458.

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<p> South Florida's loggerhead (<i>Caretta caretta</i>), green (<i>Chelonia mydas</i>) and leatherback (<i>Dermochelys coriacea </i>) sea turtles hatchling have environmentally determined sex. The <i> in situ</i> nest mean hatchling sex ratios (SR) were highly femalebiased: loggerhead <i>F</i>=0.89) and green turtle <i>F</i>=0.81; leatherback's SR was nearly balanced (0.55<i>F</i>). Nest temperatures and SRs differed between leatherbacks and loggerhead and green turtles. The latter two did not differ. The loggerhead response parameters were estimated within biological limitations by both 50-65

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21

Plot, Virginie. "Caractéristiques maternelles, performances et stratégies de reproduction des tortues marines de Guyane." Phd thesis, Université de Strasbourg, 2012. http://tel.archives-ouvertes.fr/tel-00867096.

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Les organismes font face à des compromis entre leur reproduction, leur maintenance et leur survie, dont découlent des stratégies adaptatives énergétiques, comportementales et écologiques.Ce travail de thèse propose de préciser les stratégies de reproduction chez la tortue luth Dermochelys coriacea nidifiant en Guyane. Nous avons étudié les caractéristiques maternelles, les performances de reproduction et les potentiels liens existants entre la migration et la reproduction chez une population d'individus d'identité connue, suivis grâce à un suivi longitudinal original combinant biométrie, physi

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22

Nicolau, Lídia Ventura Ramos. "Influência de fatores antropogénicos na comunidade de tartarugas marinhas em águas continentais portuguesas." Doctoral thesis, Universidade de Aveiro, 2017. http://hdl.handle.net/10773/22807.

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Doutoramento em Biologia e Ecologia das Alterações Globais – ramo Biologia e Ecologia Marinha<br>As tartarugas marinhas são um dos grupos da megafauna marinha que mais sofreram com os impactos das atividades antropogénicas. As ameaças mais significativas incluem a captura direta, o desenvolvimento costeiro, a poluição e agentes patogénicos, o aquecimento global e os impactos das pescas. As tartarugas marinhas encontram-se protegidas por vários protocolos internacionais, incluindo a Convenção CITES, as Convenções de Bona e de Berna e a Diretiva Habitats. Recentemente foram definidas a ní

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23

Hastings, Mervin Derick. "Growth and metabolism of leatherback sea turtles (Dermochelys coriacea) in their first year of life." Thesis, 2006. http://hdl.handle.net/2429/17970.

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Oxygen consumption (V02)a s monitored in six juvenile leatherback turtles (Dermochelys coriacea) imported from the Virgin Islands (UK) and kept in a covered outdoor facility at the University of British Columbia. Growth data suggest that leatherbacks can attain a mature size in as little as 5 1/2 to 6 years, much faster than other sea turtles, and reach 90 kg ( > 100 cm) in as little as 3 years when they may be thermally capable of venturing into temperature zones for greater resource availability. Animals were held at 24°C and their Routine Metabolic Rate (RoMR) was measured during the first

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24

Gonçalves, Joana Milheiro. "Atividade de nidificação e taxa de sucesso das tartarugas de couro (Dermochelys coriacea) no mar das Caraíbas na Costa Rica." Master's thesis, 2021. http://hdl.handle.net/10773/33233.

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A subpopulação de tartaruga de couro (Dermochelys coriacea) do Noroeste do oceano Atlântico, na qual a das Caraíbas se incluí, é considerada a segunda maior do mundo. É de extrema importância a sua proteção. Por isso é necessária uma caracterização mais concreta desta população para depois saber quais as medidas a adotar para a sua proteção. A população de tartarugas de couro encontra-se em risco pois apresenta a taxa de eclosão mais baixa das espécies de tartarugas marinhas. E de todas as espécies, esta é a espécie de maiores dimensões. Existem várias ameaças ao sucesso desta espécie

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25

Rodrigues, Miguel Vanzeller Gonçalves. "Foto-identificação de tartarugas marinhas." Master's thesis, 2021. http://hdl.handle.net/10773/32816.

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A seleção de indivíduos dentro de uma população de determinada espécie é um processo crucial para estimar dados ecológicos, como densidade populacional, padrões comportamentais ou sobrevivência. Métodos de Captura-Marcação-Recaptura (CMR) consistem na marcação de indivíduos e têm sido utilizados para monitorizar espécies elusivas, como é o caso da megafauna marinha. As tartarugas-marinhas são répteis que possuem uma elevada longevidade e grande parte do seu ciclo de vida é efetuado no mar. Contudo, aquando do período de reprodução, as fêmeas habitualmente acabam por regressar às

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26

(10716291), Alison Jenele Meeth. "FORAGING ECOLOGY OF NESTING GREEN, OLIVE RIDLEY, AND LEATHERBACK TURTLES FROM NORTHWEST COSTA RICA." Thesis, 2021.

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<div>Understanding what sea turtles are feeding on and where they are feeding is key to understand their overall biology and will aid in understanding what type of management actions are necessary in order to conserve and protect these endangered species. Here I set out to (1) examine the population-level isotopic profiles of three sea turtle species in the Eastern Tropical Pacific; (2) determine differences in their foraging strategies; (3) attempt to gain insights about their pre-nesting origins; and (4) determine whether body size would influence the isotopic values of an individual turtle.

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27

Ribeiro, Íris Ferreira da Silva. "Alterações dos parâmetros biométricos e reprodutores das tartarugas marinhas de São Tomé nas últimas duas décadas." Master's thesis, 2018. http://hdl.handle.net/10451/33849.

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Tese de mestrado em Biologia da Conservação, apresentada à Universidade de Lisboa, através da Faculdade de Ciências, em 2018<br>As tartarugas marinhas são um grupo sujeito a um conjunto vasto de ameaças que as colocam em risco de extinção: captura acidental em redes de pesca, caça ilegal de juvenis, adultos e ovos, redução do habitat de nidificação, construção de infraestruturas costeiras, iluminação artificial em praias de nidificação, poluição e alterações climáticas. Na ilha de São Tomé, localizada no Golfo da Guiné (África central), nidificam regularmente quatro das sete espécies de tartar

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