Morphological characteristics of Holandriana holandrii (C. Pfeiffer, 1828) (Gastropoda: Melanopsidae) in Croatia

Mirosavac, Josipa (2016) Morphological characteristics of Holandriana holandrii (C. Pfeiffer, 1828) (Gastropoda: Melanopsidae) in Croatia. Diploma thesis, Faculty of Science > Department of Biology.

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Abstract

The main objective of this study was to compare the morphological features of 16 populations of the freshwater snail Holandriana holandrii and to identify similarities and differences in the measured values. Thirty individuals were selected from each of the population, and five morphometric characteristics of the shell shapewere measured. Analysis of the morphometrical characteristics ratiosindicated that the population of snails from the river Dobra was the most different from populations sampled from other locations. The results of one-way analysis of variance (ANOVA) showed statistically significant difference between 16 populations for all measured variables, as well as for allmorphometric ratios. Pearson correlation coefficient indicated that correlation for shell length,shell width, aperture length,aperture width, spireheight and masswasnearly perfect. Based on the Principal Component Analysis (PCA) the populations of H. holandri were classified into 6 groups. The results of our research, based on morphometric characteristics, largely coincide with the results of molecular phylogenetic and phylogeographic analysis conducted earlier on the populations of the same species in Croatia.

Item Type: Thesis (Diploma thesis)
Keywords: molluscs, shell morphometry, freshwater snails
Supervisor: Lajtner, Jasna
Date: 2016
Number of Pages: 39
Subjects: NATURAL SCIENCES > Biology
Divisions: Faculty of Science > Department of Biology
Depositing User: Silvana Šehić
Date Deposited: 24 Mar 2016 15:54
Last Modified: 24 Mar 2016 15:54
URI: http://digre.pmf.unizg.hr/id/eprint/4629

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