Struktura i dinamika populacija vrste Austropotamobius torrentium (Schrank, 1803) u slivu rijeke Korane

doctoral thesis

• Title (english): Structure and dynamics of Austropotamobius torrentium (Schrank, 1803) populations in the Korana river basin
• Author: Leopoldina Dakić
• Mentor: Ivana Maguire (mentor)
• Committee member: Jasna Lajtner (član povjerenstva)
• Committee member: Renata Matoničkin Kepčija (član povjerenstva); MBZ: 231956
• Committee member: Tomislav Treer (član povjerenstva); MBZ: 111613
• Granter: University of Zagreb; Faculty of Science; (Department of Biology); Zagreb
• Defense date and country: 2015, Croatia
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Biology
• Universal decimal classification (UDC): 57 - Biological sciences. Physical anthropology. Biodiversity

Abstract

Vrsta Austropotamobius torrentium (Schrank, 1803) jedna je od četiri europske vrste desteronožnih rakova iz porodice Astacidae koja živi u hrvatskim slatkovodnim ekosustavima te je strogo zakonom zaštićena. Istraživanjem su obuhvaćene 803 jedinke iz dvije populacije u potocima Karlovačke županije. Ulovljenim jedinkama određen je spol, faza presvlačenja i reprodukcije, izmjereno je 7 morfometrijskih obilježja i težina te su označene. Maksimalna izmjerena dužina viša je od prethodno zabilježene za vrstu, a većina jedinki ima dužinu tijela između 6 i 10 cm. Dužina tijela od 6 cm određena je kao granica postizanja spolne zrelosti. Odrasli mužjaci i ženke značajno se razlikuju u mjerenim morfometrijskim obiježjima, težini tijela, prirastu dužine karapaksa i težine te u brzini rasta u težini. Mužjaci i ženke značajno se razlikuju u morfometrijskim obilježjima između populacija. Mužjaci imaju bolju kondiciju od ženki, a juvenilni rakovi imaju bolju kondiciju od adultnih. Adultne jedinke imaju najbolju kondiciju u jesen, odnosno zimu. Pomoću programa FISAT II utvrđeno je da se mužjaci i ženke razlikuju u koeficijentu rasta K. Vrijednosti ukupnog mortaliteta Z značajno se razlikuju prema korištenoj metodi. Vrijednosti brzine prirasta u dužini karapaksa dobivene MPA metodom ne razlikuju se značajno od vrijednosti dobivenih klasičnom mark-recapture metodom.

Abstract (english)

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.

• Keywords: Austropotamobius torrentium; morfometrija; struktura populacije; dinamika populacije
• Keywords (english): Austropotamobius torrentium; morphometrical characteristics; population structure; population dynamics
• Language: croatian
• URN:NBN: urn:nbn:hr:217:017582
• Study programme: Title: Biology; Study programme type: university; Study level: postgraduate; Academic / professional title: doktor/doktorica znanosti, područje prirodnih znanosti, polje biologija (doktor/doktorica znanosti, područje prirodnih znanosti, polje biologija)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Access restricted to students and staff of home institution
• Created on: 2017-05-16 12:33:29