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Fish Ecology, Evolution, and ExploitationA New Theoretical Synthesis$
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Ken H. Andersen

Print publication date: 2019

Print ISBN-13: 9780691192956

Published to Princeton Scholarship Online: January 2020

DOI: 10.23943/princeton/9780691192956.001.0001

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PRINTED FROM PRINCETON SCHOLARSHIP ONLINE (www.princeton.universitypressscholarship.com). (c) Copyright Princeton University Press, 2021. All Rights Reserved. An individual user may print out a PDF of a single chapter of a monograph in PRSO for personal use.date: 29 July 2021

Demography

Demography

Chapter:
(p.59) Chapter Four Demography
Source:
Fish Ecology, Evolution, and Exploitation
Author(s):

Ken H. Andersen

Publisher:
Princeton University Press
DOI:10.23943/princeton/9780691192956.003.0004

This chapter shows how the population size spectrum can be calculated using the vital rates of the individuals within the population: the growth rate, the reproduction rate, and the mortality as functions of size. It discusses the physiological mortality at length, and attempts to estimate its value from meta-analyses of mortality and growth rate in fish. In obtaining solutions of the population size spectrum, the chapter follows two parallel tracks: a simplified analytical solution, and a full numerical solution. The analytical solution offers insights into the governing scaling relationships between asymptotic size and population-level measures, such as spawning stock biomass, reproductive output, and lifetime reproductive output. Meanwhile, the numerical solution allows us to explore the effects of size-based fishing in the next chapter.

Keywords:   demography, population size, physiological mortality, metabolic scaling rules, mortality risk, growth rate, community size

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