Structure and dynamics of Austropotamobius torrentium (Schrank, 1803) populations in the Korana river basin

Dakić, Leopoldina (2015) Structure and dynamics of Austropotamobius torrentium (Schrank, 1803) populations in the Korana river basin. Doctoral thesis, Faculty of Science > Department of Biology.

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Abstract

Austropotamobius torrentium (Schrank, 1803) is one of four native European crayfish species inhabiting Croatian freshwaters and is protected by Croatian law. Altogether 803 animals from two populations in the Karlovačka county were analysed. Animals caught were checked for sex, moulting and reproductive status and 7 morphometric measures were taken, as well as body weight. Animals were marked before releasing. Maximal weight was higher than literature data for this species and most of the animals had total length between 6 and 10 cm. Animals reached sexual maturity at the total body length of 6 cm. Adult males and females differed significantly in morphometric measures, weight, carapace length gain and weight gain speed. Males and females differed significantly between populations in morphometric measures. Males had better condition than females, and juvenile animals had better condition than adults. Adult animals had the best condition in autumn and winter. Using FISAT II software differences in growth parameter K were deterimined between males and females, as well as in total mortality Z, which differed among methods used. Values of carapace length speed did not differ between modal progresion analysis and standard marc-recapture method.

Item Type: Thesis (Doctoral thesis)
Keywords: Austropotamobius torrentium, morphometrical characteristics, population structure, population dynamics
Supervisor: Maguire, Ivana
Date: 2015
Number of Pages: 134
Subjects: NATURAL SCIENCES > Biology
Divisions: Faculty of Science > Department of Biology
Depositing User: Grozdana Sirotic
Date Deposited: 23 Dec 2015 11:13
Last Modified: 23 Dec 2015 11:13
URI: http://digre.pmf.unizg.hr/id/eprint/4386

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