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master's thesis
Sezonska kompeticija u ishrani alohtone i autohtone vrste slatkovodnih riba - riječnog glavočića Neogobius fluviatilis (Pallas, 1814) i grgeča Perca fluviatilis Linnaeus, 1758
Zagreb: University of Zagreb, Faculty of Science, 2020. urn:nbn:hr:217:639939
Ceranić, Livija
University of Zagreb
Faculty of Science
Department of Biology

Institutional repository: Repository of the Faculty of Science

Cite this document

Ceranić, L. (2020). Sezonska kompeticija u ishrani alohtone i autohtone vrste slatkovodnih riba - riječnog glavočića Neogobius fluviatilis (Pallas, 1814) i grgeča Perca fluviatilis Linnaeus, 1758 (Master's thesis). Zagreb: University of Zagreb, Faculty of Science. Retrieved from https://urn.nsk.hr/urn:nbn:hr:217:639939

Ceranić, Livija. "Sezonska kompeticija u ishrani alohtone i autohtone vrste slatkovodnih riba - riječnog glavočića Neogobius fluviatilis (Pallas, 1814) i grgeča Perca fluviatilis Linnaeus, 1758." Master's thesis, University of Zagreb, Faculty of Science, 2020. https://urn.nsk.hr/urn:nbn:hr:217:639939

Ceranić, Livija. "Sezonska kompeticija u ishrani alohtone i autohtone vrste slatkovodnih riba - riječnog glavočića Neogobius fluviatilis (Pallas, 1814) i grgeča Perca fluviatilis Linnaeus, 1758." Master's thesis, University of Zagreb, Faculty of Science, 2020. https://urn.nsk.hr/urn:nbn:hr:217:639939

Ceranić, L. (2020). 'Sezonska kompeticija u ishrani alohtone i autohtone vrste slatkovodnih riba - riječnog glavočića Neogobius fluviatilis (Pallas, 1814) i grgeča Perca fluviatilis Linnaeus, 1758', Master's thesis, University of Zagreb, Faculty of Science, accessed 14 January 2025, https://urn.nsk.hr/urn:nbn:hr:217:639939

Ceranić L. Sezonska kompeticija u ishrani alohtone i autohtone vrste slatkovodnih riba - riječnog glavočića Neogobius fluviatilis (Pallas, 1814) i grgeča Perca fluviatilis Linnaeus, 1758 [Master's thesis]. Zagreb: University of Zagreb, Faculty of Science; 2020 [cited 2025 January 14] Available at: https://urn.nsk.hr/urn:nbn:hr:217:639939

L. Ceranić, "Sezonska kompeticija u ishrani alohtone i autohtone vrste slatkovodnih riba - riječnog glavočića Neogobius fluviatilis (Pallas, 1814) i grgeča Perca fluviatilis Linnaeus, 1758", Master's thesis, University of Zagreb, Faculty of Science, Zagreb, 2020. Available at: https://urn.nsk.hr/urn:nbn:hr:217:639939

Metadata
TitleSezonska kompeticija u ishrani alohtone i autohtone vrste slatkovodnih riba - riječnog glavočića Neogobius fluviatilis (Pallas, 1814) i grgeča Perca fluviatilis Linnaeus, 1758
Title (english)Seasonal competition in the diet of non-native and native species of freshwater fish - monkey goby Neogobius fluviatilis (Pallas, 1814) and perch Perca fluviatilis Linnaeus, 1758
AuthorLivija Ceranić
MentorZoran Marčić (mentor)
MentorMirela Sertić Perić (mentor)
Committee memberZoran Marčić (predsjednik povjerenstva)
Committee memberAna Galov (član povjerenstva)
Committee memberNenad Buzjak (član povjerenstva)
Committee memberBlanka Cvetko Tešović (član povjerenstva)
Committee memberNeven Bočić (član povjerenstva)
GranterUniversity of Zagreb
Faculty of Science
(Department of Biology)
Zagreb
Defense date and country2020-09-28, Croatia
Scientific / art field,
discipline and subdiscipline		NATURAL SCIENCES
Biology
Abstract
Posljednjih nekoliko desetljeća invazivni ponto-kaspijski glavoči, među kojima je i riječni glavočić Neogobius fluviatilis (Pallas, 1814), uzrokovali su dramatične promjene struktura ribljih zajednica. Dokazano je da dolazi do značajnih preklapanja u ishrani glavoča i europskih autohtonih ribljih vrsta kao što je grgeč Perca fluviatilis Linnaeus, 1758. Riječni glavočić naseljava bočate i slatke vode, a pretpostavlja se da je balastnim vodama unesen u Hrvatsku, gdje je u velikoj mjeri migrirao u porječje rijeke Kupe. Naraste do 20 cm hraneći se vodenim beskralježnjacima i ribom. Grgeč naseljava tekućice i stajaćice, svejed je i kanibal koji naraste do 60 cm duljine. Cilj istraživanja bio je odrediti kvalitativni i kvantitativni sastav ishrane riječnog glavočića i grgeča te analizirati kompeticiju u ishrani ove dvije vrste tijekom različitih godišnjih doba. Također, cilj je bio odrediti duljinsko-masene odnose, indeks kondicije te spolnu i dobnu strukturu jedinki obje vrste tijekom različitih sezona te korelirati navedena biološka obilježja s ishranom obje vrste. Rezultati su pokazali da jedinke grgeča imaju imaju značajno veće prosječne vrijednosti totalne duljine i mase od jedinki riječnog glavočića. Kod obje vrste dobiven je pozitivan alometrijski rast što znači da jedinke napreduju više u masi, a ne duljini. Biološki značajna vrijednost Schoenerovog indeksa preklapanja prehrambenih navika dobivena je samo u siječnju vjerojatno zato što je raspoloživost hrane tada limitirana. U ostalim mjesecima nije opažena kompeticija za hranu između dvije istraživane vrste riba.
Abstract (english)
In the last few few decades, invasive Ponto-Caspian gobies, including the monkey goby Neogobius fluviatilis (Pallas, 1814), have caused dramatic changes in fish assemblage structures. Significant overlaps in the diet of gobies and native European fish species such as perch Perca fluviatilis Linnaeus, 1758, have been observed. Monkey goby inhabits brackish and fresh water and it is assumed that it was introduced in Croatia by ballast water migrating into the Kupa river basin in a large extent. It grows up to 20 cm feeding on aquatic invertebrates and fish. The perch inhabits flowing and stagnant water, it is an omnivore and a cannibal that grows up to 60 cm. The aim of the study was to determine the qualitative and quantitative diet composition of monkey goby and perch and to analyze the competition in the diet of these two species during different seasons. Also, the aim was to determine the length-mass ratios, condition factor and sex and age structure of individuals of both species during these seasons and to correlate these biological characteristics with the diet of both species. The results showed that perch individuals have significantly higher average total body length and mass than monkey goby individuals. In both species, positive allometric growth was observed, indicating that individuals progress more in mass than in length. The biologically significant value of the Schoener’s dietary overlap index was obtained only in January, probably because the food availability was then limited. In other months, no competition for food between the two investigated species was observed.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:217:639939
Study programmeTitle: Enviromental Sciences
Study programme type: university
Study level: graduate
Academic / professional title: magistar/magistra struke znanosti o okolišu (magistar/magistra struke znanosti o okolišu)
Type of resourceText
File originBorn digital
Access conditionsOpen access
Embargo expiration date: 2022-09-28
Terms of useLicence In copyright icon
Created on2020-10-07 09:00:00