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Gene flow between populations of Balanus improvisus Darwin (Cirripedia) in British estuaries
Furman, E.R.; Yule, A.B.; Crisp, D.J. (1989). Gene flow between populations of Balanus improvisus Darwin (Cirripedia) in British estuaries, in: Ros, J.D. (Ed.) Topics in Marine Biology: Proceedings of the 22nd European Marine Biology Symposium, Barcelona, Spain, August 1987. Scientia Marina (Barcelona), 53(2-3): pp. 465-472
In: Ros, J.D. (Ed.) (1989). Topics in marine biology: Proceedings of the 22nd European Marine Biology Symposium, Barcelona, Spain, August 1987. European Marine Biology Symposia, 22. Scientia Marina (Barcelona), 53(2-3). 145-754 pp., more
In: European Marine Biology Symposia., more
Keyword
    Marine/Coastal
Authors  Top 
  • Furman, E.R.
  • Yule, A.B.
  • Crisp, D.J.
Abstract
    Samples of B. improvisus, a warm-water barnacle, were collected from the British estuaries. The allele frequencies from ten enzyme loci were analysed using horizontal starch gel electrophoresis. The allele frequency distributions between samples differed significantly at only three out of eleven loci. Nei's genetic distances between populations were very low. The sample from the Conwy estuary showed a consistant deficiency of heterozygosity and large deviation from Hardy-Weinberg equilibrum. The population is considered to be rather isolated and to exhibit considerable inbreeding, mainly through self-fertilization. Investigation of the salinity tolerance for adults, eggs and larvae shows that salinity would not be a barrier to migration from one estuary to another. The chances of the mass migration necessary to maintain the level of uniformity seen in B. improvisus allele frequencies must be very small indeed.
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