Abstract
The population structures of the common cuttlefish Sepia officinalis from the north-eastern Mediterranean (Antalya and Iskenderun Bays), Aegean (Izmir Bay) and Marmara Seas were analyzed with mtDNA PCR-RFLP, body morphometry and cuttlebone chemistry. Analysis of a ND 5/6 (Nikotin Amid Adenin Dehidrojenaz-5/6) gene segment of mtDNA revealed seven haplotypes from 120 individuals. No haplotype sharing was observed among sampling sites. The average nucleotide divergence between samples was 0.009390, and the highest genetic divergence (0.015279) was observed between the Iskenderun Bay and Marmara Sea samples. The lowest genetic divergence (0.003786) was between the Aegean Sea and Antalya Bay samples. Highly significant differences (P S. officinalis in Turkish coastal waters.
Highlights
Reliable management of fish populations should be based on truthful biological data for sustainable exploitation of biological marine resources (Carvalho and Hauser, 1994)
The contribution of S. officinalis to local fisheries differs in each sea: 9% of the total fish catch in the Aegean Sea (Salman et al, 1997) and 5-6% in the Mediterranean Sea (Salman and Katagan, 2004)
A total of 7 composite haplotypes was found from 120 individuals
Summary
Reliable management of fish populations should be based on truthful biological data for sustainable exploitation of biological marine resources (Carvalho and Hauser, 1994). Identification of intraspecific groups of marine fish species with different genetic and morphological characteristics is essential for understanding population dynamics and estimating sustainable harvests (Carvalho and Hauser, 1994). 1758) is a demersal and neritic species occurring predominantly on sandy to muddy bottoms from the coastline to about 200 m depth (FAO, 2003), and has a high commercial value in European countries (Perrin et al, 2004). It is distributed along the NE Atlantic, from the Baltic Sea to Senegal, and throughout the Mediterranean, Aegean and Marmara Seas (Guerra, 1992). There is no information on the population structure of S. officinalis in the fishing grounds of the northeastern Mediterranean, Aegean or Marmara Seas
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