New Zealand Journal of Marine and Freshwater Research abstracts
Allozyme variation in European lobster (Homarus gammarus) throughout
its distribution range
Knut E. Joerstad
Eva Farestveit
Institute of Marine Research
Post Box 1872, Nordnes
5817 Bergen, Norway
email: knut.joerstad@imr.no
Eamonn Kelly
Shellfish Research Laboratory
National University of Ireland
Galway, Ireland
Costas Triantaphyllidis
Department of Genetics, Development and Molecular Biology
School of Biology
Aristotle University of Thessaloniki
Greece
Abstract The European lobster, Homarus gammarus,
is a high value species, which is widely distributed from the northern part
of Norway to Morocco in North Africa. It is also found throughout the Mediterranean
including the Aegean Sea. Knowledge of the genetic structure is necessary
for rational management of exploited species. As part of a comprehensive
genetic investigation of European lobster (EU-project “Genetics of European
Lobster”), 1514 lobsters from 14 locations were analysed for six polymorphic
allozyme loci. Despite generally low levels of genetic differentiation (overall
FST = 0.016), the tests for population differentiation revealed highly significant
values for all loci investigated. In particular, the lobsters from three
areas including northern Norway, the Netherlands, and Aegean Sea in the Mediterranean
were genetically different from lobsters from other regions. Lobsters from
northern Norway have 30% of the genetic diversity observed in the samples
from other areas, and polymorphism was only detected at the IDHP-1* locus.
A new slow-moving allele at the GPI-1* locus was found in the samples from
the Aegean Sea. Pairwise FST comparisons, as well as a UPGMA dendrogram based
on Nei’s genetic distance (calculated from allele frequencies across the
six loci investigated), confirm the separate main groupings.
Keywords European lobster; Homarus gammarus;
genetic diversity; allozymes; genetic structure
M04091; Online publication date 8 June 2005 Received 14 April 2004; accepted
30 September 2004
New Zealand Journal of Marine and Freshwater Research, 2005, Vol. 39:
515-526
0028-8330/05/3903-0515 © The Royal Society of New Zealand 2005
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