 Dynamic Energy Budget Theory Tânia Sousa with contributions from : Gonçalo Marques and Bas Kooijman

 DEB Theory on Parameter Values

  “A comparison of the energetics of different species, ranging from bacteria to whales is reduced in DEB theory to a comparison of sets of different parameters” DEB Theory on Parameter Values

 How to obtain DEB parameters?

  Life-stages:  EggLarvae (V1 morph?)Juvenile Adult  Growth curvesSpawning season How to obtain DEB parameters?

 Kleiber’s Law  Metabolism (respiration or heat production) as a function of mass  Metabolism increases with weight raised to the power 3/4  Max Kleiber originally formulated this basic relationship back in the 1930s. What is the relationship between specific metabolism and weight?

  Relationship between specific metabolism and weight? Kleiber’s Law

 DEB Theory on Parameter Values: Scales of Life 1 – Blue whale 2 – T-Rex 13 – Komodo dragon 16 – Cyanea (jelly fish) 24 - Largest flower 26 – sequoia Etruscan shrew Brookesia Micra Chameleon

  Constant Primary Parameters DEB Theory on Parameter Values

  Empirical support: Cells are very similar independent of size of the organism

  Design Primary Parameters: Theory on Parameter Values

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  It allows us to make a first rough estimation of DEB parameters knowing L m and the parameters of a reference species Theory on Parameter Values

 Kooijman 1986 J. Theor. Biol. 121: What are the values for DEB parameters for an animal with L m =1 m? Parameters for a reference animal with L m =1cm and T REF =293 K

 Theory on Parameter Values: Flows

 Scaling relationships Pink (L sp = 53 cm) Sockeye (L sp = 55 cm) Coho (L sp = 64 cm) Chum (L sp = 68 cm) Chinook (L sp = 87 cm) z = 1 z = 68/87 = 0.78 z = 64/87 = 0.74 z = 53/87 = 0.6 z = 55/87 = 0.63 (Quinn, 2005)

 Theory on Parameter Values Kooijman 1986 J. Theor. Biol. 121: Something missing? Parameters for a reference animal with L m =1cm What are the values for DEB parameters for an animal with L m =1 m?

 Theory on Parameter Values Kooijman 1986 J. Theor. Biol. 121: Parameters for a reference animal with L m =1cm and T REF =293 K What are the values for DEB parameters for an animal with L m =1 m and T=308K?

 Theory on Parameter Values

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  Interspecies comparisons are done for:  Fully grown organism  Abundant food f(X)=1  Null heating length L T =0 Theory on Parameter Values: Flows

  Interspecies comparisons are done for:  Fully grown organism  Abundant food f(X)=1  Null heating length L T =0  How do feeding and reproduction rates depend on L m for related species? Theory on Parameter Values: Flows ?

  Interspecies comparisons are done for:  Fully grown organism  Abundant food f(X)=1  Null heating length L T =0  How do feeding and reproduction rates depend on L m for related species? Theory on Parameter Values: Flows ?

  Interspecies comparisons are done for:  Fully grown organism  Abundant food f(X)=1  Null heating length L T =0  How do feeding and reproduction rates depend on L m for related species? Theory on Parameter Values: Flows

  How do feeding and reproduction rates depend on L for the same species? Theory on Parameter Values: Flows

  How do feeding and reproduction rates depend on L for the same species? Theory on Parameter Values: Flows

 Why does size matter?

  Energetics depend on parameter values and parameter values depend on size Why does size matter?

  Energetics depend on parameter values and parameter values depend on size  What else matters? Why does size matter?

  Von Bertallanffy growth rate DEB Body Size Scaling Relations

  Metabolic rate (measured by O 2 or heat production) DEB Body Size Scaling Relations

 Exercises

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