Colour polymorphism, selection and the sex ratio in the isopod sphaeroma rugicauda (leach)


Play all audios:

SUMMARY A 3-year-study of a population of this estuarine isopod revealed seasonal changes in the frequency of the “pattern” colour morph. The changes were similar in all 3 years except for


the summer period in 1976 which was characterised by abnormal climatic conditions. Changes in morph frequency coincided with changes in the sex ratio. Experiments in the laboratory and with


animals in cages on the saltmarsh showed that frequency and sex ratio changes were due to selective mortality under conditions of low salinity and low temperature. SIMILAR CONTENT BEING


VIEWED BY OTHERS FREQUENCY-DEPENDENT BATESIAN MIMICRY MAINTAINS COLOUR POLYMORPHISM IN A SEA SNAKE POPULATION Article Open access 18 March 2022 MORPHOTYPE INDUCED CHANGES IN THE LIFE HISTORY


AND POPULATION DYNAMICS OF AN HIPPOLYTID SHRIMP Article Open access 23 November 2023 VARIABILITY, HERITABILITY AND CONDITION-DEPENDENCE OF THE MULTIDIMENSIONAL MALE COLOUR PHENOTYPE IN A


PASSERINE BIRD Article 29 June 2021 ARTICLE PDF REFERENCES * Bishop, J A. 1969. Changes in the genetic constitution of a population of _Sphaeroma rugicauda_ (Crustacea: Isopoda).


_Evolution_, 23, 589–601. Article  CAS  Google Scholar  * Bocquet, C, and Teissier, G. 1960. Génétique des populations de _Sphaeroma senatum_ (F.). 1. Stabilité du polychromatisme local.


_Cahiers Biol Mar_, 1, 103–111. Google Scholar  * Clarke, B, and Murray, J. 1962. Changes of gene-frequency of _Cepaea nemoralis_ (L). _Heredity_, 17(4), 445–465. Article  Google Scholar  *


Cook, L M. 1971. _Coefficients of Natural Selection_. Hutchinson & Co., Ltd., London. Google Scholar  * Dobzhansky, Th. 1947. Genetics of natural populations, XIV. _Genetics_, 35,


288–302. Google Scholar  * Elliott, J M. 1971. _Some methods for the statistical analysis of samples of benthic invertebrates_. Freshwater Biological Association. Scientific publication No.


25. Google Scholar  * Heath, D J. 1973. Ecological factors affecting gene frequency in a polymorphic isopod, _Sphaeroma rugicauda_ (Leach). Ph.D. thesis, University of Edinburgh. * Heath, D


J. 1974. Seasonal changes in frequency of the “Yellow” morph of the isopod _Sphaeroma rugicauda_. _Heredity_, 32, 299–307. Article  CAS  Google Scholar  * Hoestlandt, H, and


Trollé-Sciacchitano, F. 1978. Stabilité du polychromatisme de l'Isopode intertidal, _Sphaeroma senatum_, à la limite nord-est de son extension. _Comptes Rendus Series_ D, 286. (14),


1117–1121. Google Scholar  * Jansen, K P. 1970. Effect of temperature and salinity on survival and reproduction in Baltic populations of _Sphaeroma hookeri_ Leach, 1814, and _S. rugicauda_


Leach 1814, Isopod. _Ophelia_, 7, 177–185. Article  Google Scholar  * Lewontin, R C. 1974. _The Genetic Basis of Evolutionary Change_. Columbia University Press. New York and London. Google


Scholar  * Marsden, I D. 1973. The influence of salinity and temperature on the survival and behaviour of the isopod _Sphaeroma rugicauda_ from a saltmarsh habitat. _Marine Biology_, 21,


75–85. Article  Google Scholar  * Siegel, S. 1959. _Non Parametric Statistics for the Behavioral Sciences_. McGraw-Hill Book Company, Inc. Google Scholar  * Snedecor, G W, and Cochran, W G.


1971. _Statistical Methods_. The Iowa State University Press. Google Scholar  * Strickberger, M W, and Wills, C J. 1966. Monthly frequency changes of _Drosophila pseudoobscura_ third


chromosome gene arrangements in a California locality. _Evolution_, 20, 592–602. Article  CAS  Google Scholar  * West, D A. 1964. Polymorphism in the isopod, _Sphaeroma rugicauda_.


_Evolution_, 18, 671–684. Article  Google Scholar  Download references AUTHOR INFORMATION AUTHORS AND AFFILIATIONS * Department of Biology, University of Essex, Colchester, C04 3SQ, England


A A Khazaeli & D J Heath Authors * A A Khazaeli View author publications You can also search for this author inPubMed Google Scholar * D J Heath View author publications You can also


search for this author inPubMed Google Scholar RIGHTS AND PERMISSIONS Reprints and permissions ABOUT THIS ARTICLE CITE THIS ARTICLE Khazaeli, A., Heath, D. Colour polymorphism, selection and


the sex ratio in the isopod _Sphaeroma rugicauda_ (Leach). _Heredity_ 42, 187–199 (1979). https://doi.org/10.1038/hdy.1979.22 Download citation * Received: 02 October 1978 * Issue Date: 01


April 1979 * DOI: https://doi.org/10.1038/hdy.1979.22 SHARE THIS ARTICLE Anyone you share the following link with will be able to read this content: Get shareable link Sorry, a shareable


link is not currently available for this article. Copy to clipboard Provided by the Springer Nature SharedIt content-sharing initiative