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master's thesis
Reproduktivni potencijal srdele tijekom njene sezone mriještenja
2024. urn:nbn:hr:226:948879
Krstulović, Petra
University of Split
University Department of Marine Studies

Cite this document

Krstulović, P. (2024). Reproduktivni potencijal srdele tijekom njene sezone mriještenja (Master's thesis). Split: University of Split. Retrieved from https://urn.nsk.hr/urn:nbn:hr:226:948879

Krstulović, Petra. "Reproduktivni potencijal srdele tijekom njene sezone mriještenja." Master's thesis, University of Split, 2024. https://urn.nsk.hr/urn:nbn:hr:226:948879

Krstulović, Petra. "Reproduktivni potencijal srdele tijekom njene sezone mriještenja." Master's thesis, University of Split, 2024. https://urn.nsk.hr/urn:nbn:hr:226:948879

Krstulović, P. (2024). 'Reproduktivni potencijal srdele tijekom njene sezone mriještenja', Master's thesis, University of Split, accessed 11 April 2025, https://urn.nsk.hr/urn:nbn:hr:226:948879

Krstulović P. Reproduktivni potencijal srdele tijekom njene sezone mriještenja [Master's thesis]. Split: University of Split; 2024 [cited 2025 April 11] Available at: https://urn.nsk.hr/urn:nbn:hr:226:948879

P. Krstulović, "Reproduktivni potencijal srdele tijekom njene sezone mriještenja", Master's thesis, University of Split, Split, 2024. Available at: https://urn.nsk.hr/urn:nbn:hr:226:948879

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Metadata
TitleReproduktivni potencijal srdele tijekom njene sezone mriještenja
Title (english)Reproductive potential of the sardine during it's spawning season
AuthorPetra Krstulović
MentorBarbara Zorica (mentor)
Committee memberBarbara Zorica (predsjednik povjerenstva)
Committee memberSvjetlana Krstulović Šifner (član povjerenstva)
Committee memberMirela Petrić (član povjerenstva)
GranterUniversity of Split
(University Department of Marine Studies)
Split
Defense date and country2024-10-28, Croatia
Scientific / art field,
discipline and subdiscipline		BIOTECHNICAL SCIENCES
Agronomy
Abstract
Reproduktivni potencijal srdele (Sardina pilchardus) tijekom sezone mriještenja u Jadranskom moru pokazuje značajne sezonske i biološke varijacije. U istraživanju provedenom u razdoblju od listopada 2023. do travnja 2024. analizirano je 1085 jedinki srdele s rasponom duljine od 11,3 do 17 cm (srednjak ± SD; 13,37 cm ± 0,923 cm) ulovljene plivaricom „srdelarom“. Zabilježeno je 309 mužjaka (39,3 %) i 478 ženki (60,7 %) gdje je ♀/♂ = 0,61. Vrijednosti gonadosomatskog indeksa (GSI) i mase gonada (Wg) vrhunac dostižu u prosincu i ožujku, te progresivno opadaju nakon razdoblja mrijesta. Dijametri oocita mjereni su za sve mjesece istraživanja, te su rane primarne oocite iz stadija I bile prosječne veličine od 61μm, stadij II (primarne oocite) 168 μm, stadij III (sekundarne oocite) 202 μm, dok su tercijarne iz stadija IV bile prosječno 329 μm. Na svim histološkim preparatima utvrđeno je prisustvo postovulatornih folikula (POF), a na temelju zastupljenosti istih odredila učestalost mriještenja koja je iznosila 2,5 dana.
Abstract (english)
The reproductive potential of the European pilchard (Sardina pilchardus) during the spawning season in the Adriatic Sea exhibits significant seasonal and biological variations. In a study conducted from October 2023 to April 2024, 1085 specimens of sardine, ranging in length from 11,3 to 17 cm (mean ± SD; 13.37 cm ± 0.923 cm), caught using a purse seine fishing method specifically targeting sardines, were analyzed. A total of 309 males (39.3%) and 478 females (60.7%) were recorded, with a female-to-male ratio (♀/♂) of 0.61. The values of gonadosomatic index (GSI) and gonad weight (Wg) peaked in December and March and progressively declined after the spawning period. Oocyte diameters were measured for all studied months: early primary oocytes from stage I had an average size of 61 μm, stage II (primary oocytes) averaged 168 μm, stage III (secondary oocytes) averaged 202 μm, and tertiary oocytes from stage IV averaged 329 μm. Overview of all histological preparations revealed the presence of post-ovulatory follicles (POFs), and according to their frequency of occurence the spawning frequency was determined at 2.5 days.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:226:948879
Study programmeTitle: Graduate university studies Marine Fishery
Study programme type: university
Study level: graduate
Academic / professional title: sveučilišni magistar/magistra inženjer/inženjerka morskog ribarstva (sveučilišni magistar/magistra inženjer/inženjerka morskog ribarstva)
Type of resourceText
File originBorn digital
Access conditionsAccess restricted to students and staff of home institution
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Created on2025-02-25 08:35:07