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Leah Costello

BBSRC Ph.D. Student

leah.costello@postgrad.manchester.ac.uk

ORCID ID: 0000-0001-8142-0282

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About Me

I am a BBSRC DTP funded PhD student in the Shiels Lab. My research aims to provide novel information on the scale and impacts of marine microplastic pollution (MP) on sea turtles, focusing on the translocation of MPs across biological barriers. My main interests lie in integrative zoology, spanning across ecology, physiology, ethology and conservation, with a focus on marine biology.

My Background

I completed my BSc Zoology degree at the University of Bristol, graduating with first class honours in 2017. During my undergraduate programme I conducted a tropical biology field course project in Costa Rica, studying acoustic recognition in the blue jeans poison frog, Oophaga Pumilio. My final year project focussed on investigating the effect of larval rearing temperature on body size in the restricted rainforest sp. Drosophila birchii and identifying altitudinal clines in phenotypic plasticity. I went on to conduct a Masters by Research at the University of Bristol, under the supervision of Professors Innes Cuthill & Nick Scott-Samuel, investigating vision and camouflage. During this project we found that markings on the wings of Lepidoptera can be used to provide false depth cues (‘false holes’) to avian predators, reducing predation through camouflage. This research was published in Royal Society for Proceedings in Biology. 

After my Masters and during COVID, I converted a campervan and travelled around Europe, gaining my scuba-diving qualifications. This newly discovered passion for marine biology led me to pursue a PhD with a marine biology focus. In 2021 I started my PhD at the University of Manchester; after a year of studying biomechanics and energetics in sea turtles, and as a result of my observations and contacts made during my PIP placement in Panama, I wrote a PhD proposal titled ‘Investigating the impacts of marine microplastic pollution in sea turtles”, which was accepted by the BBSRC. My supervisory team includes Professor Holly Shiels, Dr Cyrill Bussy & Dr Ian Kane. 

So far, during my PhD, I have conducted field work in a range of environments: in Texas, looking at the biomechanics and energetics of locomotion in fresh-water turtles; in Valencia, Spain, investigating MP translocation in Mediterranean loggerhead sea turtles; and in Pacific Panama, investigating the impacts of MPs on reproduction in Olive Ridley turtles. We aim to provide novel insights into microplastic translocation and accumulation in these long-lived marine reptiles. 

Academic Achievements

Master of Research, The Use of False Holes in Camouflage, University of Bristol; Sept 2017 → March 2019; Award Date: 5 Mar 2019

Bachelor of Science, Zoology (First Class Hons), University of Bristol; Sept 2014 → Jun 2017; Award Date: 30 Jun 2017

 

BTEC Level 3 Award in Education and Training, Hereford & Ludlow College; Award Date: April 2020

Presentation at The Company of Biologists, Liverpool 2025.

Public Engagement

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Panama Wildlife Celebration at the CITES COP-19 Conference

Organiser of the Wildlife Celebration event in Panama City at the CITES COP-19 conference;  designing and distributing educational materials to local schools and organising a children's parade to bring attention to wildlife trafficking, use and trade. (2022)

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Educational Outreach

Educational Outreach teaching a Biodiversity & Conservation Workshop in remote schools bordering Dario and Cerro Hoya National Parks (2022)

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COIBA AIP Intern

As an Intern of COIBA AIP, I ran a workshop through the SENACYT Science Diplomacy Programme (Central & South America) about marine microplastic pollution, sea turtle conservation & the importance of Coiba Marine National Park as part of CMAR. (2023)

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Malena Sea Turtle Conservation Workshops

During my placement at Malena Sea Turtle Conservation, I ran multiple talks and workshops to the public (tourists and members of the community) about sea turtle conservation, marine plastic pollution, the work of the project and understanding the importance of locally run community conservation projects. (2022-2023)

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Conferences

I have presented my research at the FSBI Annual Symposium (2023), the International Sea Turtle Society conference (ISTS42, 2024) in Thailand and at the DCVS Postgraduate Divisional Showcase (2024).

Links
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Publications

  • Absence of atrial smooth muscle in the heart of the loggerhead sea turtle (Caretta caretta): a re-evaluation of its role in diving physiology”. https://doi.org/10.1242/jeb.244864

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