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Population consequences of individual-level mechanismsthrough dynamic energy budgets
Tjalling JagerDept. Theoretical Biology
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What is DEB?
Quantitative theory for metabolic organisation; ‘first principles’
• time, energy and mass balance
Life-cycle of the individual• links levels of organisation: molecule
ecosystems
Kooijman (2000)
Kooijman (in press)
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Metabolic organisation
food faeces
reserves
assimilation
structure
somatic maintenance
1-
maturitygametes
maturity maintenance
Traits:- growth curve- age at 1st repro- repro rate with age- feeding rates- …
?
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for embryos …
reserves
structure
somatic maintenance
1-
maturity
maturity maintenance
Traits:- egg size- hatching time- hatchling size- …
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Scope of PhD project How do effects at energy budget propagate to
population level?• emphasis on embryonic development
Organism: the pond snail (Lymnaea stagnalis) Not specific for regulatory framework or chemical
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Project structure Proposed modelling approach:
• individual model: DEB3 model in Matlab• population model: start with Euler-Lotka equation …
Experimental work:• start from existing data at individual level• additional experiments performed at INRA, France
Validation of population effects?• not foreseen …
Practical application?• demonstrate population consequences based on lit. data• collaborate in DEB-2 project (INRA, France) with EDs
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VacanciesStill looking for a CREAM PhD student …
CoursesInternational DEB Tele Course 2011
Symposia2nd International DEB Symposium 2011 in Lisbon
More information: http://www.bio.vu.nl/thb
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