Blog posts by Rebecca Holt

Do cod like it hot?

Climate change can have many impacts on our oceans; it can cause changes in oxygen concentration, ocean chemistry, water stratification as well as ocean circulation patterns. However, ocean warming is the most important factor causing changes in fish physiology, how ... Read more

Rebecca Holt

I am working to gain a PhD in quantitative evolutionary marine ecology within the Theoretical Ecology Group at the University of Bergen, in conjunction with NorMER (The Nordic Centre for Research on Marine Ecosystems and Resources Under Climate Change).

Over the past 3 years my research has focussed on deriving predictions for the individual and combined effects of climate warming and fisheries harvesting on behaviour, life-history strategies and population dynamics of marine teleosts; with a particular focus on Atlantic cod (Gadus morhua). This research has required the development of a complex individual-based model using dynamic programming techniques within Matlab. Through this type of modelling approach I have been able to incorporate temperature-dependent respiratory physiology as a key constraint as well as ecological and life-history considerations to reveal the underlying mechanisms and drivers of change in response to climate warming and fisheries exploitation.
This work has been developed further within recent research collaborations at James Cook University, Australia where the model was developed and adapted to predict the effects of temperature on tropical reef fish as well as with researchers at DTU Aqua, Copenhagen where the model was extended to provide predictions on the effects of prey type and prey quality on the behaviour and life-history of Baltic Sea whiting (Merlangius melangus).

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