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Morphologic-genetic study of populations of salt-water gastropod \kur{Hexaplex trunculus} from Mediterranean sea
MACÍK, Jiří
Variability in genes and shell shape of salt water gastropod Hexaplex trunculus (Linné, 1758) was compared among the samples from three Croatian coastline localities, four localities on Greek island Lefkada and two localities from south France coastline in total number of 464 specimens. Genetical criteria were not found for separating individual populations. No variability were found in 683 bp long fragment of gene for michondrial cytochrome c oxidase subunit one (COI). Differences among populations were not significant, even in conection of my data with the data of recent portuguese study (sequences from GenBank). Differences among populations were found by the geometric morphometric method. Based on these results, morphotypes for certain habitats were determined. During the study, high level of tributyltin (TBT) pollution in the Mediterranean sea causing sexual malformation called imposex phenomenon, was proved in this species of gastropod.
Geometric - morphometric study of gastropod shells \kur{Hexaplex trunculus} from Croatian coast line of the Adriatic sea
MACÍK, Jiří
The shape variability of three hundred shells of sea snail Hexaplex trunculus (Linné, 1758) of three sites of Croatian coast line was compared. No criteria were found for distinguishing among males, females and imposex disabled females by traditional morphometry. With the help of traditional morphometry and geometric morphometry, differences in the shape of shells among the three investigated populations were identified. On the shells of H. Trunculus, there were found moderate sexual differences using the geometric-morphometric methods. The results separated females from the remaining two categories (males and masculinized females).

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4 MACÍK, Jan
4 Macík, Jan
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