Post-Nesting Migration and Mitochondrial DNA Structures of Olive Ridley Turtles (Lepidochelys olivacea) Nested on Beaches of the Bird’s Head of Papua and the Lesser Sunda Regions, Indonesia

Adnyana, Windia; Jayaratha, Made; Purwanasari, Hidayatun Ni sa; Wandia, I Nengah; Dethmers, Kiki; Limpus, Colin J.

doi:10.29322/ijsrp.10.07.2020.p10390

Cited by 3 publications

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“…In total, 283 Kemp's ridley (Duchene et al 2012;Frey et al 2014;Reid et al 2019;Frandsen et al 2020) and 340 olive ridley sequences were obtained from published studies (Duchene et al 2012;Plot et al 2012;Jensen et al 2013;Revuelta et al 2015;González-Paredes et al 2017;Campista León et al 2019;Work et al 2019;Adnyana et al 2020;Silver-Gorges et al 2020;Stelfox et al 2020). Several segments from Madagascar and India (Stelfox et al 2020) were excluded because haplotype frequencies were not available, and only publicly accessible haplotypes from Adnyana et al (2020) were included. Sequences were aligned and truncated to the most common overlapping region, a 653 bp segment used to analyze all 1,230 individuals.…”

Section: Mitochondrial Dnamentioning

confidence: 99%

“…With a new and substantially expanded data set of geographical genetic patterns, this study revisited and updated these hypotheses on the population history, phylogeography, and distribution of ridley sea turtles, as well as their global management units. Previous research relied on geographically restricted sampling, mitochondrial sequences, and ensuing limited inference power (Bowen et al 1997;Jensen et al 2013;Campista León et al 2019;Work et al 2019;Adnyana et al 2020;Silver-Gorges et al 2020;Stelfox et al 2020). Our goals were therefore to (i) investigate current geographic patterns of genetic diversity in ridley populations around the world, (ii) determine genetic relationships between populations and oceanic regions, (iii) explore changes in temporal and spatial population distributions, (iv) infer divergence and differentiation times between populations and the two ridley species, and (v) compare ridley phylogeographical patterns to those of other sea turtle taxa.…”

Section: Introductionmentioning

confidence: 99%

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Global phylogeography of ridley sea turtles (Lepidochelys spp.): evolution, demography, connectivity, and conservation

et al. 2022

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Globally distributed marine taxa are well suited for investigations of biogeographic impacts on genetic diversity, connectivity, and population demography. The sea turtle genus Lepidochelys includes the wide-ranging and abundant olive ridley (L. olivacea), and the geographically restricted and ‘Critically Endangered’ Kemp’s ridley (L. kempii). To investigate their historical biogeography, we analyzed a large dataset of mitochondrial DNA (mtDNA) sequences from olive (n = 943) and Kemp’s (n = 287) ridleys, and genotyped 15 nuclear microsatellite loci in a global sample of olive ridleys (n = 285). We found that the ridley species split ~ 7.5 million years ago, before the Panama Isthmus closure. The most ancient mitochondrial olive ridley lineage, located in the Indian Ocean, was dated to ~ 2.2 Mya. Both mitochondrial and nuclear markers revealed significant structure for olive ridleys between Atlantic (ATL), East Pacific (EP), and Indo-West Pacific (IWP) areas. However, the divergence of mtDNA clades was very recent (< 1 Mya) with low within- clade diversity, supporting a recurrent extinction-recolonization model for these ocean regions. All data showed that ATL and IWP groups were more closely related than those in the EP, with mtDNA data supporting recent recolonization of the ATL from the IWP. Individual olive ridley dispersal between the ATL, EP, and IN/IWP could be interpreted as more male- than female-biased, and genetic diversity was lowest in the Atlantic Ocean. All populations showed signs of recent expansion, and estimated time frames were concordant with their recent colonization history. Investigating species abundance and distribution changes over time is central to evolutionary biology, and this study provides a historical biogeographic context for marine vertebrate conservation and management.

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Section: Mitochondrial Dnamentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Global phylogeography of ridley sea turtles (Lepidochelys spp.): evolution, demography, connectivity, and conservation

et al. 2022

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“…Chattopadhyay et al [24] reported that Odisha coast is significantly "arribada" process for Olive Ridley species till date. According to Adnyana et al [25] reported that the Olive Ridley species nesting in Indonesia Papua and Sunda regions are genetically different and follows different patterns to migrate pathways. Carpio et al [26] studied sea level oscillation in the coast of Ecuador and reported that future change in the sea level may affect the nesting ground significantly.…”

Section: Global Status Of Olive Ridleymentioning

confidence: 99%

Nesting Biology and Site Selection of Olive Ridley—A Coherence of Nature

Malarvizhi¹,

Mohan²

2023

OJMS

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Nesting behaviour of sea turtles remains a subject to study, due to their enigmatic pattern of seasonal breeding activities. In the present study, characteristics of the breeding turtle, Olive Ridley (Lepidochelys olivacea) at Ramnagar along N-E coast of North Andaman Islands were investigated, for the nesting periods 2016-2017. Olive Ridley is the dominant sea turtles, with more than 300 individuals nesting every season with at least a 75% hatching success rate. It is one of the conducive, highly protective and undisturbed nesting sites for Olive Ridley on North Andaman coast. In the present study an initiative is made, to identify nature's cues and the biological characteristics of Olive Ridley, which leads it to nest at Ramnagar beach, with a high hatchling success rate.

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Connectivity between sea turtles off Jeju Island on the Korean Peninsula, and other populations in the western Pacific

Jang,

Jo,

Jang

et al. 2024

Front. Mar. Sci.

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The northwestern Pacific region is an important habitat for sea turtles, hosting five species out of seven. There is still limited information available about the sea turtle aggregations around the Korean Peninsula, which is the northern boundary for many sea turtle species in the western Pacific area. The present study aims to investigate the migratory route of sea turtles visiting Jeju Island. Five species of sea turtles were identified from by-catch and stranding data between 2013 and 2022 on Jeju Island in Korea: green (Chelonia mydas; 24 individuals), loggerhead (Caretta caretta; 9), hawksbill (Eretmochelys imbricata; 2), olive ridley (Lepidochelys olivacea; 2), and leatherback (Dermochelys coriacea; 1). Mixed stock analysis using mitochondrial DNA haplotypes revealed that Jeju green turtles primarily originate from the rookeries of the Japanese Archipelago. This connectivity between two regions was also supported by the similar genetic composition of loggerhead turtles. Similarly, satellite tracking data showed that several green turtles originating from Jeju Island migrated to waters near the Ryukyu Archipelago in Japan. Nevertheless, about 60% of the tracked green turtles stayed near Jeju Island, with most overwintering there, indicating the long residency in Jeju Island. This study also provides the genetic sequences of other three species including new orphan haplotypes of hawksbill and olive ridley turtles. Our findings suggest that Jeju Island serves as a stable foraging habitat and provide insight into understanding the habitat range of sea turtles in the western Pacific.

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Post-Nesting Migration and Mitochondrial DNA Structures of Olive Ridley Turtles (Lepidochelys olivacea) Nested on Beaches of the Bird’s Head of Papua and the Lesser Sunda Regions, Indonesia

Cited by 3 publications

References 0 publications

Global phylogeography of ridley sea turtles (Lepidochelys spp.): evolution, demography, connectivity, and conservation

Global phylogeography of ridley sea turtles (Lepidochelys spp.): evolution, demography, connectivity, and conservation

Nesting Biology and Site Selection of Olive Ridley—A Coherence of Nature

Connectivity between sea turtles off Jeju Island on the Korean Peninsula, and other populations in the western Pacific

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Post-Nesting Migration and Mitochondrial DNA Structures of Olive Ridley Turtles (Lepidochelys olivacea) Nested on Beaches of the Bird’s Head of Papua and the Lesser Sunda Regions, Indonesia

Cited by 3 publications

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G﻿lobal phylogeography of ridley sea turtles (Lepidochelys spp.): evolution, demography, connectivity, and conservation

G﻿lobal phylogeography of ridley sea turtles (Lepidochelys spp.): evolution, demography, connectivity, and conservation

Nesting Biology and Site Selection of Olive Ridley—A Coherence of Nature

Connectivity between sea turtles off Jeju Island on the Korean Peninsula, and other populations in the western Pacific

Contact Info

Product

Resources

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Global phylogeography of ridley sea turtles (Lepidochelys spp.): evolution, demography, connectivity, and conservation

Global phylogeography of ridley sea turtles (Lepidochelys spp.): evolution, demography, connectivity, and conservation