Utjecaj kaveznih uzgajališta riba u Zadarskoj županiji na opterećenje mora

doctoral thesis

• Title (english): Impact of cage fish farming on eutrophication in Zadar County
• Author: Jadranka Šangulin
• Mentor: Tarzan Legović (mentor)
• Committee member: Petar Kružić (predsjednik povjerenstva)
• Committee member: Ivan Katavić (član povjerenstva)
• Committee member: Goran Kniewald (član povjerenstva)
• Granter: University of Zagreb; Faculty of Science; (Department of Biology); Zagreb
• Defense date and country: 2014, Croatia
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Biology
• Universal decimal classification (UDC): 57; NATURAL SCIENCES; Biological sciences. Physical anthropology. Biodiversity

Abstract

Razvoj kaveznog uzgoja ribe otvara pitanja negativnog utjecaja na okoliš morskog dijela Zadarske županije. Predmet ovog istraživanja je bio procijeniti utjecaj kaveznog uzgoja analizom fizikalno-kemijskih pokazatelja u stupcu mora i sedimentu, i bioloških pokazatelja pridnenih zajednica.U periodu od 2006. do 2013. godine analizirano je 18 uzgajališta i 10 referentnih postaje na udaljenosti 500 metara od kaveza. Ustanovljene su značajne razlike u fizikalno-kemijskim pokazateljima u stupcu vode postaja uzgajališta u odnosu na referentne uvjete za BPK5 i klorofil α. Usporedba indeksa trofičnosti TRIX-a, UNTRIX-a, koeficijenta efikasnosti, otkriva da predloženi TRIX indeks nije dovoljno učinkovit u procjeni utjecaja unosa hranjivih tvari u oligotrofne vode. Nalazi različitih indeksa bioraznolikosti otkrivaju da je bioraznolikost u neposrednoj blizini kaveza smanjena. Klaster analizom objedinjenih podataka o bioraznolikosti i fizikalno-kemijskih analiza u stupcu vode i sedimentu, odvojene su postaje kod kojih je evidentan utjecaj kaveznog uzgoja. Karakteriziraju ih osim povišene količine fosfora u sedimentu, oportunističke vrste Antedon mediterranea (Lamarck, 1816); Echinus melo Lamarck, 1816; Holothuria tubulosa (Gmelin, 1791); Belone belone (Linnaeus, 1761); Phymanthus pulche (Andrès, 1883); i Mytilus galloprovincialis (Lamarck, 1819), kao i povećana količina aerobnih bakterija, povišen BPK5 i suspendirane tvari.

Abstract (english)

Negative impact of increasing fish culture development in Zadar County has been raising concern. The aim of this study is to assess the impact on the physical and chemical parameters of sediment and a water column, while additionally examining the biological impacts on the bethic community. In the period from 2006 to 2013, a total of 18 fish farms and 10 reference stations distanced 500 meters from cages were investigated. Physical and chemical water column analysis reveal significant impact of fish farms in comparison with the reference station for BPK5 and chlorophyll α. Comparison of, TRIX, UNTRIX and an efficiency coefficient of trophic properties, revealed that the proposed TRIX is not adequete enough in demonstrating impact on oligotrophic water nutrient loads. Result of different biological indices reveal a decrease of biodiversity in a near cage vicinity. Cage farm stations with an evident ecological impact were separated trough cluster analysis of pooled data including biodiversity investigation, physical and chemical analysis of water column and sediment. Besides considerable total phoshorus increase in sediment, the stations are characterized with dominance of opportunistic species Antedon mediterranea (Lamarck, 1816); Echinus melo Lamarck, 1816; Holothuria tubulosa (Gmelin, 1791); Belone belone (Linnaeus, 1761); Phymanthus pulcher (Andrès, 1883) and Mytilus galloprovincialis Lamarck, 1819, as well as increased amount of aerobic bacteria, BPK5 and suspended solids.

• Keywords: kavezni uzgoj; eutrofikacija; TRIX; sediment; bioraznolikost; Jadransko more
• Keywords (english): cage fish farms; eutrophication; TRIX; sediment; biodiversity; Adriatic sea
• Language: croatian
• URN:NBN: urn:nbn:hr:217:353586
• 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: Closed access
• Created on: 2017-05-22 12:20:19