Population dynamics of native and invasive crayfish species in the Korana River

Šimunić, Bernarda (2016) Population dynamics of native and invasive crayfish species in the Korana River. Diploma thesis, Faculty of Science > Department of Biology.

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Abstract

Recent studies established the presence of three native crayfish species in the Korana River drainage: Astacus astacus, Astacus leptodactylus and Austropotamobius torrentium. In addition to native species in the Korana River, recent studies also recorded the presence of invasive alien species, the signal crayfish (Pacifastacus leniusculus). Since 2011, the Korana River has been continuously monitored, especially the distribution, expansion and population status of the mentioned alien and native species. The signal crayfish is gradually displacing the native species in the Korana River. To complement the research conducted so far, the goal of this study was to assess relative population abundance and characteristics of the signal crayfish population in the Korana River. We explored the issues by analysing potential differences in the morphometric parameters and body condition between genders, locations, and two periods (2012 and 2014). In the year 2014 native narrow-clawed crayfish were not recorded. Further, differences in relative density of invasive signal crayfish along the invasion areal, as well as differences in body condition between studied localities and compared years were established.

Item Type: Thesis (Diploma thesis)
Keywords: crayfish species, freshwater invasion, range expansion, signal crayfish, Croatia
Supervisor: Maguire, Ivana
Co-supervisor: Hudina, Sandra
Date: 2016
Number of Pages: 45
Subjects: NATURAL SCIENCES > Biology
Divisions: Faculty of Science > Department of Biology
Depositing User: Silvana Šehić
Date Deposited: 24 Mar 2016 12:35
Last Modified: 24 Mar 2016 12:35
URI: http://digre.pmf.unizg.hr/id/eprint/4619

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