Abstract
Stock structure analysis of anchovy from the Rovinj, Maslenica and Island of Korčulain in theAdriatic Sea was carried out by using 13 microsatellite loci. Overall, 259 alleles were detected in13 loci, the number of alleles per locus and population ranged from 4 to 28. The allelic richness ofoverall loci was found to be highest in the Rovinj population and lowest in the Island of Korčulapopulation. The highest and lowest value of population specific alleles was found in the Rovinjpopulation and Island of Korčula population, respectively. Observed heterozygosity per populationwas ranged from 0.714 (Rovinj) to 0.678 (Maslenica). Pairwise FST values revealed that there is nosignificant genetic differences between populations (P>0.05). However, the highest and lowestgenetic distance were found between the Rovinj and Maslenica populations (FST=0.00626) andbetween the Island of Korčula and Maslenica populations, respectively. The UPGMA dendrogramclustered the Maslenica and Island of Korčula populations together, and the Rovinj population wasa distinct cluster from these two.
Highlights
European anchovy, Engraulis encrasicolus L. 1758, is widely distributed in pelagic waters in the Eastern Atlantic from the North Sea to South Africa, including the Mediterranean and Black Sea (Fischer et al, 1987; Turan et al 2007)
The present study investigated the genetic structure of anchovy stocks along the Crotian coast of Adriatic Sea by using 13 microsatellite loci which have not been employed for these stocks previously
13 microsatellite loci in 89 specimens were analysed for determination of genetic structuring between the three Adriatic anchovy populations
Summary
Engraulis encrasicolus L. 1758, is widely distributed in pelagic waters in the Eastern Atlantic from the North Sea to South Africa, including the Mediterranean and Black Sea (Fischer et al, 1987; Turan et al 2007). The European anchovy populations have been studied many times by means of morphological data (Bembo et al, 1996a; Turan et al, 2004, Aka et al, 2004), allozymes (Bembo et al, 1996b; Borsa, 2002; Erdogan et al, 2009) and mitochondrial DNA (Magoulas et al, 1996; Grant, 2005; Magoulas et al, 2006) to elucidate their population structuring from several different areas Based on these studies, the North East Atlantic and Mediterranean populations are partitioned today into several different spawning groups, isolated from each other by complex shorelines and oceanic regimes. MtDNA and microsatellite results in Borell et al (2012) suggested the presence of at least three genetically differentiated groups: the West Cantabrian sea, the rest of the populations in the Bay of Biscay, and the Mediterranean
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