Diversity and community structure of snail fauna (Mollusca, Gastropoda) of middle and lower reach of the Cetina river

Dobrović, Ana (2015) Diversity and community structure of snail fauna (Mollusca, Gastropoda) of middle and lower reach of the Cetina river. Diploma thesis, Faculty of Science > Department of Biology.

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Abstract

The main objective of this study was to determine the diversity and community structure of freshwater snails of middle and lower reach of the Cetina river. Field research was conducted from August 2004 to August 2005 at three stations - Trilj, in the middle reach, where the samples were collected in one habitat type, and Čikotina lađa and Radmanove mlinice in the lower reach, where the samples are collected in three different microhabitats (substrates). Snails are determined to species and subspecies level.The species density was determined based on the number of individuals. Based on morphometric measurements, age structure of most abundant species was analyzed. During the study, a total of 19 species of freshwater snails was found and 6 belong to the family Hydrobiidae. The highest number of species and population density were recorded on pebbles of Radmanove mlinice station. Most species spawn during spring and summer, as evidenced by the presence of juveniles. The analysis of functional feeding groups showed an equal share of scrapers and detririvores in the middle reach, while the lower reach is dominated by scrapers. Results of the cluster analysis of snail communities similarity at different stations and microhabitats, based on population density, showed a clear distincition of middle and lower reach communities of the Cetina river.

Item Type: Thesis (Diploma thesis)
Keywords: molluscs, growth structure, functional feeding guilds
Supervisor: Lajtner, Jasna
Date: 2015
Number of Pages: 53
Subjects: NATURAL SCIENCES > Biology
Divisions: Faculty of Science > Department of Biology
Depositing User: Grozdana Sirotic
Date Deposited: 17 Apr 2015 09:06
Last Modified: 17 Apr 2015 09:06
URI: http://digre.pmf.unizg.hr/id/eprint/3829

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