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106 results for “green turtle”
Green turtle ddRAD raw sequencing data
<p>The occasional westward transport of warm water of the Agulhas Current, 'Agulhas leakage', around southern Africa has been suggested to facilitate tropical marine connectivity between the Atlantic and Indian oceans, but the 'Agulhas leakage' hypothesis doesn't explain the signatures of eastward gene flow observed in many tropical marine fauna. We investigated an alternative hypothesis: the establishment of a warm-water corridor during comparatively warm interglacial periods. The 'warm-water corridor' hypothesis was investigated by studying the population genomic structure of Atlantic and Southwest Indian Ocean green turtles (<i>N </i><span>= 27) </span>using 12,035 genome-wide single nucleotide polymorphisms (SNPs) obtained via ddRAD sequencing. Model-based and multivariate clustering suggested a hierarchical population structure with two main Atlantic and Southwest Indian Ocean clusters, and a Caribbean and East Atlantic sub-cluster nested within the Atlantic cluster. Coalescent-based model selection supported a model where Southwest Indian Ocean and Caribbean populations diverged from the East Atlantic population during the transition from the last interglacial period (130 – 115 thousand years ago; kya) to the last glacial period (115 – 90 kya). The onset of the last glaciation appeared to isolate Atlantic and Southwest Indian Ocean green turtles into three refugia, which subsequently came into secondary contact in the Caribbean and Southwest Indian Ocean when global temperatures increased after the Last Glacial Maximum. Our findings support the establishment of a warm-water corridor facilitating tropical marine connectivity between the Atlantic and Southwest Indian Ocean during warm interglacials.</p>
Novel disease state model finds most juvenile green turtles develop and recover from fibropapillomatosis
<p>Fibropapillomatosis (FP) is a sea turtle disease characterized by benign tumor development on skin, eyes, and/or internal organs. It primarily affects juvenile green turtles (Chelonia mydas) in coastal foraging sites. The Indian River Lagoon (IRL), Florida, USA, is a coastal green turtle foraging site where the observed FP annual rate averaged 49% between 1983 and 2018. FP is not a major cause of sea turtle mortality and most individuals fully recover; however, the overall dynamics of this disease are poorly understood because prior disease history is unknown for individuals without FP at capture time, and future disease outcome is unknown for individuals with FP at capture time. To better evaluate FP dynamics for green turtles in the IRL, we developed a hierarchical model for predicting disease state change. We used data from 4,149 captures of 3,700 individual green turtles captured in the IRL. The hierarchical disease state model contained two levels: level one modeled whether an individual would develop FP, and level two modeled disease state progression, including states for pre-FP affliction, active FP affliction, and full recovery from FP. From the hierarchical model, we estimated 99.8% (95% credibility intervals 99.1-100%) of juvenile green turtles in the IRL developed FP, indicating that nearly every individual in the IRL is affected by this disease. The model also suggested that turtles quickly developed FP upon recruitment to the IRL and then recovered at different rates, with most completely recovering before emigrating from the IRL as they mature. This is the first analysis of long-term sea turtle data suggesting nearly every turtle in an aggregation both develops and recovers from FP.</p>
Data and scripts for: Green turtles highlight connectivity across a regional marine protected area network in West Africa
<p>Data derivates and analysis scripts (in R) used for the paper on analyzing green turtle MPA coverage and connectivity in West Africa.</p>
Figure 2. Tree heliotrope growing along a in Of turtles and trees: Nutritional analysis of tree heliotrope (Heliotropium foertherianum) leaves consumed by green turtles (Chelonia mydas) in Hawaiʻi
Figure 2. Tree heliotrope growing along a seawater canal at Nan Madol, Pohnpei, FSM. Photo by Gregory A. Koob, US FWS, 2016
Figure 1 in Of turtles and trees: Nutritional analysis of tree heliotrope (Heliotropium foertherianum) leaves consumed by green turtles (Chelonia mydas) in Hawaiʻi
Figure 1. Green turtle consuming floating, senescent tree heliotrope leaves in the Hilton Waikoloa Lagoon, Kona, Hawaiʻi. Photo by M. Rice
Figure 7. 2007-2008 in Conservation considerations revealed by the movements of post-nesting green turtles from the Republic of the Marshall Islands
Figure 7. 2007-2008 post-nesting movement of a 101 cm CCL green turtle ID 40702, "Loj5", from Erikub Atoll, Republic of the Marshall Islands to pelagic waters east of Erikub. Loj5 traveled a total distance of 4,212 km, in the 278 days the satellite tag transmitted.
Figure 6. 2007 in Conservation considerations revealed by the movements of post-nesting green turtles from the Republic of the Marshall Islands
Figure 6. 2007 post-nesting movement of a 100 cm CCL green turtle ID 40605, "Loj4", from Erikub Atoll, Republic of the Marshall Islands to Pohnpei, Federated States of Micronesia. Loj4 traveled a total distance of 4,039 km, in the 162 days the satellite tag transmitted.
Figure 5. 2007-2008 in Conservation considerations revealed by the movements of post-nesting green turtles from the Republic of the Marshall Islands
Figure 5. 2007-2008 post-nesting movement of a 96 cm CCL green turtle ID 40703, "Loj3", from Erikub Atoll, Republic of the Marshall Islands to the southern islands of Bikini Atoll. Loj3 traveled a total distance of 6,739 km, in the 215 days the satellite tag transmitted.
Figure 3. 2007-2008 in Conservation considerations revealed by the movements of post-nesting green turtles from the Republic of the Marshall Islands
Figure 3. 2007-2008 post-nesting movement of a 105 cm CCL green turtle ID 40719, "Loj2", from Erikub Atoll, Republic of the Marshall Islands to Palawan Island, Philippines. Loj2 traveled a total distance of 6,935 km, in the 345 days the satellite tag transmitted.
Figure 4. 2007-2008 in Conservation considerations revealed by the movements of post-nesting green turtles from the Republic of the Marshall Islands
Figure 4. 2007-2008 post-nesting movement of a 100 cm CCL green turtle ID 40728, "Loj1", from Erikub Atoll, Republic of the Marshall Islands to Tarawa, Kiribati. Loj1 traveled a total distance of 2,795 km, in the 234 days the satellite tag transmitted.
Figure 2. 2007-2008 in Conservation considerations revealed by the movements of post-nesting green turtles from the Republic of the Marshall Islands
Figure 2. 2007-2008 post-nesting movement of five green turtles from Erikub Atoll, Republic of the Marshall Islands.
Figure 1 in Conservation considerations revealed by the movements of post-nesting green turtles from the Republic of the Marshall Islands
Figure 1. Map of Republic of the Marshall Islands – major atolls labeled. Inset map of Erikub Atoll, Republic of the Marshall Islands. Loj island, the nesting site where turtles were satellitetagged, is indicated by red arrow.
Fig. 1 in Molecular epidemiology and pathology of spirorchiid infection in green sea turtles (Chelonia mydas)
Fig. 1. Lesions associated with spirorchiid blood flukes in Chelonia mydas. a) Mild (score = 1) granulomatous lesions (G) and lymphocytic inflammation within the cerebral meninges of an adult green turtle, centred on a brown-shelled fluke ovum. HE stain, scale bar = 125 Mm b) Moderate (score = 3) granulomatous lesions (G) and lymphocytic inflammation within the cerebral meninges of an adult green turtle, centred on several brown-shelled fluke ova. HE stain, scale bar = 350 Mm c) Severe (score = 5) granulomatous lesions (G) and lymphocytic inflammation within the meninges of a small immature green turtle, centred on multiple numerous fluke ova. HE stain, scale bar = 350 Mm d) Severe (score = 5) granulomatous lesion (G) with necrotic centre protruding into the lumen of the aorta of an adult green turtle, with dense lymphocytic inflammation in surrounding tissues. Numerous adult flukes (Hapalotrema pambanensis) were recovered from the heart and major vessels. HE stain, scale bar = 1.7 mm. (For interpretation of the references to colour in this figure legend, the reader is referred to the web version of this article.)
Fig. 3. A in Fatal Rameshwarotrema uterocrescens infection with ulcerative esophagitis and intravascular dissemination in green turtles
Fig. 3. A Rameshwarotrema uterocrescens Rao (1975) (Digenea, Pronocephalidae) from Chelonia mydas Linnaeus 1758 (Testudines, Cheloniidae) from Brazil. Scale bar = 200 μm. B Rameshwarotrema uterocrescens Rao (1975) (Digenea, Pronocephalidae) from Chelonia mydas Linnaeus 1758 (Testudines, Cheloniidae) from Brazil under plane-polarized light. Note birefringent eggs (arrow). Scale bar = 200 μm. C Egg dissected from Rameshwarotrema uterocrescens Rao (1975) (Digenea, Pronocephalidae) from Chelonia mydas Linnaeus 1758 (Testudines, Cheloniidae) from Brazil. Note polar filament (arrow). Scale bar = 50 μm.
Fig. 1. A in Fatal Rameshwarotrema uterocrescens infection with ulcerative esophagitis and intravascular dissemination in green turtles
Fig. 1. A Obstructive ulcerous exudative gastroesophagitis, gastroesophageal region, large ulcerated area covered by solid caseous exudate. Scale bar = 3 cm. B Granulomatous necrotic hepatitis, liver, miliary caseous parasitic granulomas. Scale bar = 4 cm.
Fig. 2. A in Fatal Rameshwarotrema uterocrescens infection with ulcerative esophagitis and intravascular dissemination in green turtles
Fig. 2. A Initial lesion caused by R. uterocrescens (red arrow) associated with esophageal gland desquamation (black arrow). Scale bar = 100 μm. B Ulcerative esophagitis, esophagus, extensive loss of esophageal mucosa with eight specimens of R. uterocrescens (arrow) embedded in necrotic amorphous eosinophilic tissue in submucosa with marked heterophilic inflammatory infiltrate. Scale bar = 500 μm. C Marked inflammation with heterophils and macrophages (*) in esophageal submucosa. Scale bar = 50 μm. D. R. uterocrescens in ectatic vessel, note red blood cells (arrow). Scale bar = 100 μm. E Heart with R. uterocrescens under plane-polarized light, with birefringent eggs between myocardiocytes (arrow). Scale bar = 100 μm. F Granulomatous hepatitis, liver, R. uterocrescens (arrow) next to necrotic mass (*) formed by degenerate leukocytes, rare parasite eggs, cell debris peripherally enveloped by multinucleated giant cells. Scale bar = 200 μm. G Granulomatous hepatitis, liver, birefringent R. uterocrescens eggs (black arrow) under plane-polarized light enveloped by multinucleated giant cells (red arrow). Scale bar = 50 μm. H Immersed eggs (black arrow) in thrombotic (*) arteritis (red arrow). Parasite in kidney artery seen under planepolarized light with intensely birefringent eggs. Scale bar = 100 μm. (For interpretation of the references to colour in this figure legend, the reader is referred to the Web version of this article.)
Figure 1 in Invertebrate infestation in green turtle (Chelonia mydas (Linnaeus, 1758)) and loggerhead turtle (Caretta caretta (Linnaeus, 1758)) nests on Alata Beach, Mersin, Turkey
Figure 1. The important sea turtle nesting beaches in Turkey and a general view of Alata beach showing the back structure.
Figure 2 in Artificial light at night on nesting beaches of the green turtle, Chelonia mydas, in the eastern Mediterranean and its possible effect on populations
Figure 2. Annual mean radiance values (in nW/cm2sr) showing an increasing trend for four major C. mydas nesting sites categorized as high ALAN. The dotted blue line indicates the threshold (2) for determining high ALAN levels.
Fig. 5 in Possible hybridization between East Pacific Green Chelonia mydas and Olive Ridley Lepidochelys olivacea sea turtles in northwest Mexico
Fig. 5. Healthy neonate turtles presenting characteristics of both East Pacific Green and Olive Ridley Turtles photographed before release. Photos by C.E. Hart (A) and F. Sanchez (B).
Fig. 6 in Possible hybridization between East Pacific Green Chelonia mydas and Olive Ridley Lepidochelys olivacea sea turtles in northwest Mexico
Fig. 6. Olive Ridley neonate from Nayarit with the commonly found coloration of fine white border to carapace and fore flippers. This coloration is not reported in the literature for this species. Photos by C.E. Hart.
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Allen Brain Atlas
Allen Brain Atlas is an Allen Institute collection of brain map atlases, datasets, APIs, and analysis tools covering mouse, human, and non-human primate brain resources.
Annotated Behaviour and Observability Dataset (ABODe)
ABODe is a University of Edinburgh DataShare dataset for behavior classification in group-housed mice using home-cage video, identities, bounding boxes, ground-plate positions, and annotator labels.
DANDI Archive for NWB datasets
DANDI is a BRAIN Initiative archive for publishing and sharing neurophysiology data, including electrophysiology, optophysiology, and behavioral data packaged as NWB and related standards.
International Brain Laboratory public data
The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.