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Population Fluctuations in Rodents$
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Charles J. Krebs

Print publication date: 2013

Print ISBN-13: 9780226010359

Published to Chicago Scholarship Online: September 2013

DOI: 10.7208/chicago/9780226010496.001.0001

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Reproductive Rates in Fluctuating Populations

Reproductive Rates in Fluctuating Populations

(p.43) Chapter Three Reproductive Rates in Fluctuating Populations
Population Fluctuations in Rodents

Charles J. Krebs

University of Chicago Press

Rodents are well known for their high rates of reproduction. A vole population with an adult weight of 30 grams would increase fivefold over a year while an 80-gram lemming would increase about three times. This chapter discusses the role that changes in reproductive rates plays in causing changes in rodent population growth rates, and four key parameters which affect population growth rates: sexual maturity, length of breeding season, litter size, and pregnancy rate.

Keywords:   reproduction, voles, lemmings, reproductive rates, sexual maturity, breeding season, litter size, pregnancy rate

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