Kvalitativni i kvantitativni sastav ihtiofaune rijeke Orljave i njenih pritoka

master's thesis

• Title (english): Qualitative and quantitative composition of the ichthyofauna of the Orljava River and its tributaries
• Author: Ana Špelić
• Mentor: Davor Zanella (mentor)
• Mentor: Sven Horvatić (komentor)
• Committee member: Davor Zanella (predsjednik povjerenstva)
• Committee member: Mirela Sertić Perić (član povjerenstva)
• Committee member: Draginja Mrvoš-Sermek (član povjerenstva)
• Committee member: Jasna Lajtner (član povjerenstva)
• Granter: University of Zagreb; Faculty of Science; (Department of Biology); Zagreb
• Defense date and country: 2024-09-26, Croatia
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Biology

Abstract

Rijeka Orljava i njeni pritoci stanište su raznolike ihtiofaune, uključujući strogo zaštićene te Natura 2000 vrste. Iako brojna, ihtiofauna Orljave do sada nije sistematično analizirana. Stoga, cilj istraživanja bio je analizirati brojnost i sastav ribljih populacija u rijeci Orljavi uzorkovanih elektro ribolovom u periodu od 2014. do 2023. godine, odrediti indekse bioraznolikosti zastupljenost stranih vrsta i odrediti zastupljenost vrsta prema trofičkim i ekološkim grupama. U rijeci Orljavi... More zabilježeno je ukupno 38 različitih vrsta riba, raspoređenih u 32 roda, 15 porodica i 7 redova. Na uzorkovanim lokacijama ukupno je prikupljeno 22.339 jedinki riba, pri čemu su u ulovu dominirale dvoprugasta uklija, gavčica i uklija. Najveći broj vrsta, njih 19, je zabilježen na lokaciji Orljava kod mjesta Lužani, a najmanje ih je pronađeno u pritocima Londže (samo četiri vrste). Od Natura 2000 vrsta zabilježene su peš i potočna mrena, i to na 44 lokacije, od čega su bile najbrojnije na vodotoku Veličanka. Prema ekološkoj preferenciji staništa, najviše je zabilježenih reofilnih vrsta (njih 19), zatim euritopa (13 vrsta), a samo su tri vrste limnofili, što ukazuje kako u slijevu Orljave prevladavaju lotička staništa. Najmanja bioraznolikost riba je zabilježena u malim pritocima, a najveća u donjem toku Orljave i njenim pritocima, gdje je ujedno i najveća raznolikost staništa zbog blizine rijeke Save. Less

Abstract (english)

The Orljava River and its tributaries is a habitat of diverse ichthyofauna, some of which are strictly protected and Natura 2000 species. Although plentiful, the ichthyofauna of the Orljava River has not been systematically analyzed so far. Therefore the aim of this research was to analyze the number and composition of fish populations in the Orljava River sampled by electrofishing in the timespan between 2014 and 2023, and to determine biodiversity indices, the representation of non-native... More species, and to determine the representation of species according to trophic and ecological groups. A total of 38 different species of fish were recorded in the Orljava River, distributed in 32 genera, 15 families and 7 orders. A total of 22,339 fish had been collected at the sample locations; the catch was primarily composed of two-striped spirlin, bitterling and common bleak. The largest abundance of species (19 species) was found in the Orljava area close to the town of Lužani, whereas only four species were detected in the tributaries of Lonža. European bullhead and Danube barbel were found in 44 places among the Natura 2000 species, with the Veličanka watercourse having the highest concentration of these species. Based on ecological habitat preference, lotic habitats are predominant in the Orljava basin, which is evident from the number of reported rheophilic species (19), followed by eurytopus (13 species), and three limnophilic species. The lowest fish biodiversity was recorded in small tributaries, and the highest in the lower reaches of the Orljava River and its tributaries, where the greatest diversity of habitats is also found due to the proximity of the Sava River. Less

• Keywords: tekućice; bioraznolikost; riblje zajednice; strogo zaštićene vrste
• Keywords (english): running waters; biodiversity; fish communities; endangered species
• Language: croatian
• URN:NBN: urn:nbn:hr:217:726855
• Study programme: Title: Biology and Chemistry Education-University integrated undergraduate and graduate programme; specializations in: Biology; Course: Biology; Study programme type: university; Study level: integrated undergraduate and graduate; Academic / professional title: sveučilišni/a magistar/magistra edukacije biologije i kemije (sveučilišni/a magistar/magistra edukacije biologije i kemije)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2025-01-29 10:54:54