Wide-Scale Population Connectivity Revealed by Postnesting Migrations of Green Sea Turtles from Ras Al Hadd, Oman

2021 ◽  
Vol 20 (1) ◽  
Author(s):  
Nicolas James Pilcher ◽  
Marina A. Antonopoulou ◽  
Clara Jimena Rodriguez-Zarate ◽  
Thuraya Said Al-Sareeria ◽  
Robert Baldwin ◽  
...  
Keyword(s):  
Sea Turtles ◽  
Population Connectivity ◽  
Green Sea Turtles ◽  
Scale Population ◽  
Wide Scale

scholarly journals Making a Difference: Adaptation of the Clinical Laboratory in Response to the Rapidly Evolving COVID-19 Pandemic

2021 ◽  
Vol 8 ◽  
pp. 237428952110239
Author(s):  
Nikhil S. Sahajpal ◽  
Ashis K. Mondal ◽  
Sudha Ananth ◽  
Allan Njau ◽  
Sadanand Fulzele ◽  
...  
Keyword(s):  
Clinical Laboratory ◽  
Clinical Manifestations ◽  
Nasopharyngeal Swab ◽  
Next Generation Sequencing Technology ◽  
Making A Difference ◽  
Scale Population ◽  
Wide Scale ◽  
Pooling Strategy ◽  
Polymerase Chain ◽  
Phylogenetic Evolution

The COVID-19 pandemic, caused by severe acute respiratory syndrome coronavirus 2, led to unprecedented demands assigned to clinical diagnostic laboratories worldwide, forcing them to make significant changes to their regular workflow as they adapted to new diagnostic tests and sample volumes. Herein, we summarize the modifications/adaptation the laboratory had to exercise to cope with rapidly evolving situations in the current pandemic. In the first phase of the pandemic, the laboratory validated 2 reverse transcription polymerase chain reaction–based assays to test ∼1000 samples/day and rapidly modified procedures and validated various preanalytical and analytical steps to overcome the supply chain constraints that would have otherwise derailed testing efforts. Further, the pooling strategy was validated for wide-scale population screening using nasopharyngeal swab samples and saliva samples. The translational research arm of the laboratory pursued several initiatives to understand the variable clinical manifestations that this virus presented in the population. The phylogenetic evolution of the virus was investigated using next-generation sequencing technology. The laboratory has initiated the formation of a consortium that includes groups investigating genomes at the level of large structural variants, using genome optical mapping via this collaborative global effort. This article summarizes our journey as the laboratory has sought to adapt and continue to positively contribute to the unprecedented demands and challenges of this rapidly evolving pandemic.

scholarly journals Challenges in Evaluating the Severity of Fibropapillomatosis: A Proposal for Objective Index and Score System for Green Sea Turtles (Chelonia mydas) in Brazil

PLoS ONE ◽  
2016 ◽  
Vol 11 (12) ◽  
pp. e0167632 ◽  
Author(s):  
Silmara Rossi ◽  
Angélica María Sánchez-Sarmiento ◽  
Ralph Eric Thijl Vanstreels ◽  
Robson Guimarães dos Santos ◽  
Fabiola Eloisa Setim Prioste ◽  
...  
Keyword(s):  
Sea Turtles ◽  
Chelonia Mydas ◽  
Score System ◽  
Green Sea Turtles

scholarly journals Stirred but not shaken: population and recruitment genetics of the scallop (Pecten fumatus) in Bass Strait, Australia

2016 ◽  
Vol 73 (9) ◽  
pp. 2333-2341 ◽  
Author(s):  
Jennifer R. Ovenden ◽  
Bree J. Tillett ◽  
Michael Macbeth ◽  
Damien Broderick ◽  
Fiona Filardo ◽  
...  
Keyword(s):  
Genetic Structure ◽  
Population Genetic Structure ◽  
Population Genetic ◽  
Allelic Variation ◽  
Open Water ◽  
Marine Species ◽  
Population Connectivity ◽  
Valuable Insight ◽  
Fine Scale ◽  
Scale Population

Abstract We report population genetic structure and fine-scale recruitment processes for the scallop beds (Pecten fumatus) in Bass Strait and the eastern coastline of Tasmania in southern Australia. Conventional population pairwise FST analyses are compared with novel discriminant analysis of principal components (DAPC) to assess population genetic structure using allelic variation in 11 microsatellite loci. Fine-scale population connectivity was compared with oceanic features of the sampled area. Disjunct scallop beds were genetically distinct, but there was little population genetic structure between beds connected by tides and oceanic currents. To identify recruitment patterns among and within beds, pedigree analyses determined the distribution of parent–offspring and sibling relationships in the sampled populations. Beds in northeastern Bass Strait were genetically distinct to adjacent beds (FST 0.003–0.005) and may not contribute to wider recruitment based on biophysical models of larval movement. Unfortunately, pedigree analyses lacked power to further dissect fine-scale recruitment processes including self-recruitment. Our results support the management of disjunct populations as separate stocks and the protection of source populations among open water beds. The application of DAPC and parentage analyses in the current study provided valuable insight into their potential power to determine population connectivity in marine species with larval dispersal.

Nonlethal capture of green sea turtles (Chelonia mydas) in fishing weirs as an opportunity for population studies and conservation

2021 ◽  
pp. 105437
Author(s):  
Eduardo H.S.M. Lima ◽  
Danielle Rodrigues Awabdi ◽  
Maria Thereza D. Melo ◽  
Bruno Giffoni ◽  
Leandro Bugoni
Keyword(s):  
Population Studies ◽  
Sea Turtles ◽  
Chelonia Mydas ◽  
Green Sea Turtles

scholarly journals Efficiency of island homing by sea turtles under multimodal navigating strategies

2018 ◽  
Author(s):  
K. J. Painter ◽  
A. Z. Plochocka
Keyword(s):  
Charles Darwin ◽  
Sea Turtles ◽  
Paradigm Case ◽  
Agent Based ◽  
Green Sea Turtles ◽  
Green Turtles ◽  
Guidance Cues ◽  
Animal Navigation ◽  
Ascension Island ◽  
Odour Plumes

AbstractA dot in the vastness of the Atlantic, Ascension Island remains a lifelong goal for the green sea turtles that hatched there, returning as adults every three or four years to nest. This navigating puzzle was brought to the scientific community’s attention by Charles Darwin and remains a topic of considerable speculation. Various cues have been suggested, with orientation to geomagnetic field elements and following odour plumes to their island source among the most compelling. Via a comprehensivein silicoinvestigation we test the hypothesis that multimodal cue following, in which turtles utilise multiple guidance cues, is the most effective strategy. Specifically, we combine agent-based and continuous-level modelling to simulate displaced virtual turtles as they attempt to return to the island. Our analysis shows how population homing efficiency improves as the number of utilised cues is increased, even under “extreme” scenarios where the overall strength of navigating information decreases. Beyond the paradigm case of green turtles returning to Ascension Island, we believe this could commonly apply throughout animal navigation.

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