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1. Rapid growth and large body size in annual fish populations are compromised by density-dependent regulation.

Author

Vrtílek M, Žák J, Polačik M, Blažek R, and Reichard M

Subjects
Africa, Age Distribution, Animals, Ecosystem, Female, Fundulidae physiology, Male, Mozambique, Population Density, Seasons, Sex Factors, Body Size physiology, Cyprinodontiformes growth & development, Fundulidae growth & development
Abstract

We tested the effect of population density on maximum body size in three sympatric species of annual killifishes Nothobranchius spp. from African ephemeral pools. We found a clear negative effect of population density on body size, limiting their capacity for extremely fast development and rapid growth. This suggests that density-dependent population regulation and the ephemeral character of their habitat impose contrasting selective pressures on the life history of annual killifishes., (© 2019 The Fisheries Society of the British Isles.)

Published
2019
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