Marine Biology

, Volume 131, Issue 2, pp 203–212

Allozyme variation in global populations of striped mullet, Mugil cephalus (Pisces: Mugilidae)

  • A. R. Rossi
  • M. Capula
  • D. Crosetti
  • L. Sola
  • D. E. Campton
Article

DOI: 10.1007/s002270050312

Cite this article as:
Rossi, A., Capula, M., Crosetti, D. et al. Marine Biology (1998) 131: 203. doi:10.1007/s002270050312

Abstract

The striped mullet, Mugil cephalus Linnaeus, 1758, is one of the few species of marine shore fish with a worldwide circumtropical distribution. Because of this distribution and the dependency of M. cephalus on coastal waters during various phases of its life cycle, as well as nearshore living habits, questions have been raised regarding levels of genetic divergence and gene flow among transoceanic populations. To cast more light on this, allozyme variation at 27 presumptive gene loci was investigated in ten globally diverse populations. The observed heterozygosity ranged from 0.018 (Hawaii) to 0.081 (Florida), averaging 0.050. The proportion of polymorphic loci showed a similar trend. Several populations were characterised by fixed allelic differences. Estimated gene diversities were very high, the allele frequency variation among populations was found to be 68%; genetic distances reached 0.242, with an average of 0.117. Estimated rates of gene flow were high among Mediterranean populations (Nm = 7.26), and between Mediterranean and East Atlantic populations (Nm= 2.86), but extremely low between non-contiguous populations within the Indian, Pacific and Atlantic Oceans, where Nm ranged from 0.03 to 0.05.

Copyright information

© Springer-Verlag Berlin Heidelberg 1998

Authors and Affiliations

  • A. R. Rossi
    • 1
  • M. Capula
    • 3
  • D. Crosetti
    • 2
  • L. Sola
    • 1
  • D. E. Campton
    • 4
  1. 1.Department of Animal and Human Biology, University of Rome “La Sapienza”, Via A. Borelli 50, I-00161 Rome, ItalyIT
  2. 2.ICRAM, Central Institute for Marine Research, Via di Casalotti 300, I-00166 Rome, ItalyIT
  3. 3.Museum of Zoology of Rome, Viale del Giardino Zoologico 20, I-00197 Rome, ItalyIT
  4. 4.Department of Fisheries and Aquatic Sciences, University of Florida, 7922 N.W. 71st Street, Gainesville, Florida 32653-3071, USAUS