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My lab investigates fish ecology, conservation and management, primarily by combining large environmental and fisheries datasets with the analysis of chemical markers in fish archival tissues (e.g. otoliths, eye lenses) to reconstruct migration patterns, health and diet. The results provide unique insights into fish behaviours and habitat needs in natural settings, allowing us to better predict how climate change and other stressors will shape their evolution, productivity and resilience.

I joined the University of Essex as a lecturer in 2020, and am also a UK Research and Innovation Future Leaders Fellow (; 2022-25), a co-leader of an international working group focused on marine connectivity (; 2020-24), a co-convenor of the 2023 FSBI International Symposium Fish Habitat Ecology in a Changing Climate ( and one of the University of Essex's Public Voice Scholars (2023-25). 

In my lab, we are currently leading and/or collaborating on projects exploring (1) the effect of different stressors (e.g. warming, habitat loss) and management actions on the migratory behaviour, growth and resilience of salmonids, (2) estimating the connectivity patterns and contribution rates of nursery grounds to the adult stock for sea bass, tuna and anchovies, (3) combining genetic and otolith tools to explore the relationship between genotype and phenotype, (4) exploring new tools to reconstruct hormone and contaminant histories in multiple fish species, (5) modeling the influence of environmental and anthropogenic drivers on fish growth and health, (6) analysing historical data on consumer demand and trade in seafood supply chains, (7) using stable isotope analysis to understand the trophic ecology and habitat use of multiple species, including teleosts and cephalopods (primarily the common cuttlefish). 
University of Essex
Joe Dawson (Research Assistant 2021-)
Peter Betts (PhD student 2022-)
Felix Astejada (BSc/
Frontrunner 2021-22, MSD student 2022-24)
Lorna McKellar (MSc student 2021-22)
Lauren Bell (BSc 2021-22)
Joaquin Diaz Sanchez (BSc 2021-22)
Mike Bevins Cameron (Frontrunner 2022)

Ashmitha Jayachandran Mishma (Frontrunner 2022)
Katerina Schiffnederova (Frontrunner 2022)
Luke Harrison (MSc student 2020-21)
Lucy Smith (BSc 2020-21)
Nicole Grierson (BSc 2020-21)
Sophie Gibson (BSc 2020-21)

University of California Davis
Mollie Ogaz (Junior Specialist 2019-20)
Sage Lee (Junior Specialist 2019-20)
Laura Coleman (Junior Specialist 2018-20)
Sierra Schluep (Student Assistant 2018-19)
Bradyn O'Connor (Student Assistant 2018-19)
Amanda Gonzales (Student Assistant 2019)
Keiko Mertz (Junior Specialist 2017-19)
Pedro Morais (Postdoctoral fellow 2017-19)
Kelly Neal (Student Assistant and Junior Specialist 2016-20)
Dana Myers (Student Assistant 2016-18)
Krista Schmidt (Student Assistant 2016-19)
George Whitman (JJ Lab Manager 2015-)
Rachel Johnson (NOAA / UC Davis Center for Watershed Sciences), Stephanie Carlson (UC Berkeley), Carson Jeffres (UC Davis Center for Watershed Sciences), Karin Hussy (DTU), Karin Limburg (SUNY-ESF), Stefanie Haase (Thünen-Institut), Serena Wright (Cefas), Georg Engelhard (Cefas), Jim Ellis (Cefas), Clive Trueman (University of Southampton), Ewan Hunter (AFBI), Stephen Wing (University of Otago), Mariah Meek (Michigan State), Will Satterthwaite (NOAA), Corey Phillis (MWD), Ted Sommer (DWR), J.D. Wikert (USFWS), Flora Cordoleani (NMFS/UC Santa Cruz), Sebastien Nussle (Eawag - Swiss Federal Institute of Aquatic Science & Technology), Malte Willmes (UC Davis), Hugh Sturrock (, Brett Harvey (DWR), Jason Hassrick (ICF), Steve Lindley (NOAA), Eoin O'Gorman (University of Essex), Tom Cameron (University of Essex), Boyd McKew (University of Essex), Michelle Taylor (University of Essex), Ben Ciotti (University of Plymouth), Audrey Darnaude (CNRS, France), Susanne Tanner (MARE, Portugal).
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