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undergraduate thesis
Modeliranje dinamike ranih stadija riba
2018. urn:nbn:hr:226:947411
Fornažar, Marija
University of Split
University Department of Marine Studies

Cite this document

Fornažar, M. (2018). Modeliranje dinamike ranih stadija riba (Undergraduate thesis). Split: University of Split. Retrieved from https://urn.nsk.hr/urn:nbn:hr:226:947411

Fornažar, Marija. "Modeliranje dinamike ranih stadija riba." Undergraduate thesis, University of Split, 2018. https://urn.nsk.hr/urn:nbn:hr:226:947411

Fornažar, Marija. "Modeliranje dinamike ranih stadija riba." Undergraduate thesis, University of Split, 2018. https://urn.nsk.hr/urn:nbn:hr:226:947411

Fornažar, M. (2018). 'Modeliranje dinamike ranih stadija riba', Undergraduate thesis, University of Split, accessed 21 January 2025, https://urn.nsk.hr/urn:nbn:hr:226:947411

Fornažar M. Modeliranje dinamike ranih stadija riba [Undergraduate thesis]. Split: University of Split; 2018 [cited 2025 January 21] Available at: https://urn.nsk.hr/urn:nbn:hr:226:947411

M. Fornažar, "Modeliranje dinamike ranih stadija riba", Undergraduate thesis, University of Split, Split, 2018. Available at: https://urn.nsk.hr/urn:nbn:hr:226:947411

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Metadata
TitleModeliranje dinamike ranih stadija riba
Title (english)Modelling the dynamics of early fish stages
AuthorMarija Fornažar
MentorGordana Beg Paklar (mentor)
Committee memberZvjezdana Popović Perković (predsjednik povjerenstva)
Committee memberGordana Beg Paklar (član povjerenstva)
Committee memberJure Brčić (član povjerenstva)
GranterUniversity of Split
(University Department of Marine Studies)
Split
Defense date and country2018-09-24, Croatia
Scientific / art field,
discipline and subdiscipline		NATURAL SCIENCES
Interdisciplinary Natural Sciences
Abstract
Rad daje pregled različitih modela kojima se znanstvena zajednica služi za modeliranje dinamike ranih stadija ribe. Opisana je primjena modela na jajašca i larve gospodarski i ekološki važnih vrsta inćuna (Engraulis encrasicolus) i srdele (Sardina pilchardus) u Jadranskom moru i Humboldtovoj struji i hujice (Ammodytes marinus) u Sjevernom moru. Diskutirane su primjene dviju vrsta modela: hidrodinamičkog i individualno temeljenog modela (engl. individual based model, IBM). U prezentiranim znanstvenim člancima istraživao se utjecaj fizikalnih i bioloških parametara na mrijest i novačenje larvi. U području zapadne Humboldtove struje rezultati su pokazali maksimalno zadržavanje zimi a minimalno ljeti. Fitoplanktonski maksimumi su se pokazali iznimno važnim (kao dostupnost hrane), ali se vremenski ne poklapaju s maksimumom populacije larvi. Čestice veće plovnosti su pokazale kraće zadržavanje. Dubina piknokline i gustoća morske vode su značajni parametri za određivanje vremena i postotka zadržavanja kao i dubina ispuštanja jajašaca te vertikalne migracije larvi. Prilikom simulacija unazad u vremenu disperzija se pokazala iznimno važnom za mrijest, preživljavanje i razvoj ribljeg jata. U Jadranskom moru je najveća koncentracija larvi (> 25%) uz talijansku obalu i to ispred regija Abruzzo i Molise. Gotovo u nijednom području uz zapadnu obalu osim uz deltu rijeke Po nije došlo do zadržavanja larvi dok je na istočnoj obali zadržavanje puno veće Visoka produktivnost morske vode se pokazala kao glavni faktor koncentracije juvenila, a tome osim riječnih dotoka pridonose i fizikalni faktori kao što su fronte i izranjanje (upwelling).
Abstract (english)
This paper reviews numerical models that are used for modelling early fish stages. Model application on fish eggs and larvae is shown in the example of economically and ecologicaly important species such as European pilchard (Sardina pilchardus) and European anchovy (Engraulis encrasicolus) in the Adriatic and Humboldt's current and Raittꞌs sand eel (Ammodytes marinus) in the North Sea. Two types of models are discussed: hydrodynamic and IBM (individual based model). The influence of physical and biological factors on spawning and recruitment are described in the presented scientific articles. Results showed that in the northern Humboldt current the maximum retention appears during winter and mi-nimum during summer. Although the phytoplanktonic maxima are important as a source of nutrition they do not coincide with the maximum population of larvas. Particles of greater buoyancy have shown shorter retention. The pycnocline depth, sea water density, depth of the egg release and the vertical migrations have shown to be of great importance for retention. During backtracking, dispersion is a very important factor for spawning, larval survival and for the formation of fish flock. The majority of larval concentration in the Adriatic was along the west coast (>25%) in front of Abruzzo and Molise regions. Along the east coast and in front Po river delta retention was noticeable which was not the case along the Italian coast. The main factor for juvenile concentration seems to be high productivity with river inflows and physical factors like water fronts and upwelling contributing to it.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:226:947411
Study programmeTitle: Marine Biology and Ecology
Study programme type: university
Study level: undergraduate
Academic / professional title: sveučilišni/a prvostupnik/prvostupnica (baccalaureus/baccalaurea) biologije i ekologije mora (sveučilišni/a prvostupnik/prvostupnica (baccalaureus/baccalaurea) biologije i ekologije mora)
Type of resourceText
File originBorn digital
Access conditionsAccess restricted to students and staff of home institution
Terms of useLicence In copyright icon
Created on2022-02-21 14:54:21