Disputation: Clarissa Akemi Kajiya Endo

PhD candidate Clarissa Akemi Kajiya Endo at the Department of Biosciences will be defending the thesis "Early life stages of Northeast Arctic cod under various climate and demographic stock conditions" for the degree of PhD.

Profile picture of Clarissa Akemi Kajiya Endo

Clarissa Akemi Kajiya Endo

The trial lecture is: "Climate change impacts on early life stage dispersal: Global challenges and future perspectives".

Time and place: June.16, 2022 10:15 AM, Zoom and Nucleus, Bikuben, The Kristine Bonnevie building

The events will also be live streamed using Zoom. The host of the session will moderate the technicalities while the chair of the defence will moderate the events.

The events opens for participation just before they start, and closes for new participants approximately 15 minutes after it has begun.

Main research findings

The recruitment to the cod stock in the Barents Sea varies greatly from year to year, with consequences for the ecosystem and fisheries. The mechanisms behind and the reasons for this variation are still unclear. We shed light on factors that affect the survival and geographical distribution of the earliest life stages, that is, eggs and larvae. The statistical analyses indicate that the age distribution of the spawning stock affects the larval abundance, and that the condition of the spawners affects the larval distribution. Numerical modeling results suggest that the positive effects of high temperature on growth, survival, and ultimately recruitment are, on average, greater than the negative effects of food restriction. These findings reveal mechanisms that contribute to the varied distribution, growth and survival of cod from spawning and through the first years of life.

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Adjudication committee

Research Scientist Manuel Hidalgo, Spanish Institute of Oceanography

Senior Researcher Annette Samuelsen, Nansen Environmental and Remote Sensing Center

Associate Professor Yngvild Vindenes, University of Oslo

Chair of defence

Researcher Joël Durant, University of Oslo


Leif Christian Stige, University of Oslo

Frode Vikebø, Institute of Marine Research

Solfrid Sætre Hjøllo, Institute of Marine Research

Morten Skogen, Institute of Marine Research


Published June 2, 2022 9:56 AM - Last modified June 17, 2022 10:10 AM