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Main Title

Mortality Rates from Size Distribution: The Application of a Conservation Law.

Author

Van Sickle, John ;

CORP Author

Corvallis Environmental Research Lab., OR. Ecological Effects Research Div.;National Research Council, Washington, DC.

Year Published

1976

Report Number

EPA/600/J-77/131;

Stock Number

PB-287 000

Additional Subjects

Population(Statistics) ; Size determination ; Mortality ; Marine biology ; Mathematical models ; Distribution(Property) ; Steady state ; Growth ; Population growth ; Density(Mass/volume) ; Age ; Estimating ; Fisheries ; Comparison ; Clams ; Reprints ; Ecosystems ; Tivela stultorum

Holdings

Library	Call Number	Additional Info	Location	Last Modified	Checkout Status
NTIS	PB-287 000	Some EPA libraries have a fiche copy filed under the call number shown.		07/26/2022

Collation

Abstract

A population model explicitly describing the dynamics of an arbitrary population size distribution is presented. One consequence of the model is an equation for the exact shape of the size distribution of a stationary or steady-state population. The shape is expressed as a function of size-specific mortality and growth rates. From the equation, various mortality estimation formulas can be derived, two of which are discussed in detail. One of the methods permits estimation of size-specific mortality rates without the assumption of a theoretical growth model.

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