Biološko-ekološke značajke oštrulja Aulopyge huegelii Heckel, 1843 (Cyprinidae; Actinopterygii)

doctoral thesis

• Title (english): Bio-ecological characteristics of dalmatian barbelgudgeon Aulopyge huegelii HECKEL, 1843 (Cyprinidae; Actinopterygii)
• Author: Tanja Mihinjač
• Mentor: Milorad Mrakovčić (mentor)
• Committee member: Perica Mustafić (predsjednik povjerenstva)
• Committee member: Marina Piria (član povjerenstva)
• Granter: University of Zagreb; Faculty of Science; (Department of Biology); Zagreb
• Defense date and country: 2018-10-31, Croatia
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Biology
• Universal decimal classification (UDC): 57 - Biological sciences. Physical anthropology. Biodiversity

Abstract

Slatkovodna riba oštrulj endem je jadranskog slijeva rasprostranjen u Hrvatskoj i Bosni i Hercegovini. Ovo istraživanje obuhvatilo je populacije iz jezera Visovac na Krki i jezera Torak na Čikoli te populaciju gornjeg toka Čikole u Hrvatskoj i kanala Ždralovac u BiH. Terenski dio istraživanja proveden je od prosinca 2013. godine do lipnja 2016. godine te su obrađene ukupno 264 jedinke. Jedinke iz različitih populacija međusobno su uspoređene na temelju morfologije (morfometrija, meristika i vanjski izgled) i ekologije (dužinsko-maseni odnosi, razmnožavanje, prehrana, starost, rast i smrtnost), a rezultati pokazuju da jedinke iz gornjeg toka rijeke Čikole dosežu manje duljine tijela i manju starost te imaju lošije kondicijsko stanje i manji reproduktivni uspjeh od jedinki iz jezerskih sustava. Dobivene razlike rezultat su različitih uvjeta staništa na kojem pojedine populacije žive. Također, rezultati ukazuju na važnost zaštite oštrulja i njegovog staništa, naročito povremenih vodotoka, koji predstavljaju njegovo primarno stanište.

Abstract (english)

Dalmatian barbelgudgeon is a species of freshwater fish endemic to rivers of the Adriatic basin in Croatia and Bosnia and Herzegovina. This research surveyed populations from Croatia (from lake Visovac on river Krka, lake Torak on river Čikola, and from upper river Čikola) and B&H (canal Ždralovac). The field work was carried out from December 2013 to June 2016 during which 264 specimens were caught. Individuals from different populations were compared based on morphology (morphometrics, meristics, external appearance) and ecology (length-weight relationships, reproduction, diet, age, growth, mortality). The results show that individuals from the upper part of river Čikola have smaller body size, shorter life-span, lower condition, and lower reproductive success than individuals from lake systems. Observed differences are the result of different habitats in which these populations live. Also, the results show the importance of protecting the barbelgudgeon and its habitat, especially temporary streams which are its primary habitat.

• Keywords: oštrulj; Krka; Čikola; morfologija; ekologija
• Keywords (english): Dalmatian barbelgudgeon; Krka; Čikola; morphology; ecology
• Language: croatian
• URN:NBN: urn:nbn:hr:217:897199
• 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: Open access
• Created on: 2018-11-07 12:59:56