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master's thesis
Histološka i morfometrijska analiza gonada mužjaka kostelja (Squalus acanthias L.) u Jadranskom moru
Zagreb: University of Zagreb, Faculty of Science, 2012. urn:nbn:hr:217:245585
Posavec, Ivan
University of Zagreb
Faculty of Science
Department of Biology

Institutional repository: Repository of the Faculty of Science

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Posavec, I. (2012). Histološka i morfometrijska analiza gonada mužjaka kostelja (Squalus acanthias L.) u Jadranskom moru (Master's thesis). Zagreb: University of Zagreb, Faculty of Science. Retrieved from https://urn.nsk.hr/urn:nbn:hr:217:245585

Posavec, Ivan. "Histološka i morfometrijska analiza gonada mužjaka kostelja (Squalus acanthias L.) u Jadranskom moru." Master's thesis, University of Zagreb, Faculty of Science, 2012. https://urn.nsk.hr/urn:nbn:hr:217:245585

Posavec, Ivan. "Histološka i morfometrijska analiza gonada mužjaka kostelja (Squalus acanthias L.) u Jadranskom moru." Master's thesis, University of Zagreb, Faculty of Science, 2012. https://urn.nsk.hr/urn:nbn:hr:217:245585

Posavec, I. (2012). 'Histološka i morfometrijska analiza gonada mužjaka kostelja (Squalus acanthias L.) u Jadranskom moru', Master's thesis, University of Zagreb, Faculty of Science, accessed 25 November 2024, https://urn.nsk.hr/urn:nbn:hr:217:245585

Posavec I. Histološka i morfometrijska analiza gonada mužjaka kostelja (Squalus acanthias L.) u Jadranskom moru [Master's thesis]. Zagreb: University of Zagreb, Faculty of Science; 2012 [cited 2024 November 25] Available at: https://urn.nsk.hr/urn:nbn:hr:217:245585

I. Posavec, "Histološka i morfometrijska analiza gonada mužjaka kostelja (Squalus acanthias L.) u Jadranskom moru", Master's thesis, University of Zagreb, Faculty of Science, Zagreb, 2012. Available at: https://urn.nsk.hr/urn:nbn:hr:217:245585

Metadata
TitleHistološka i morfometrijska analiza gonada mužjaka kostelja (Squalus acanthias L.) u Jadranskom moru
Title (english)Histological and morphometric analysis of gonads in the male spiny dogfish (Squalus acanthias L.) in the Adriatic Sea
AuthorIvan Posavec
MentorGordana Lacković-Venturin (mentor)
Committee memberGordana Lacković-Venturin (član povjerenstva)
Committee memberZoran Tadić (član povjerenstva)
Committee memberŽeljka Vidaković Cifrek (član povjerenstva)
GranterUniversity of Zagreb
Faculty of Science
(Department of Biology)
Zagreb
Defense date and country2012, Croatia
Scientific / art field,
discipline and subdiscipline		NATURAL SCIENCES
Biology
Abstract
U razdoblju od 2005. do 2007. godine na području sjevernog Jadrana prikupljena je 61 jedinka mužjaka vrste pas kostelj (Squalus acanthias L.). Istraživano područje obuhvaćalo je Lošinjski akvatorij između 44°32’ i 43°44’ sjeverne zemljopisne širine te 15°05’ i 14°40’ istočne zemljopisne dužine. Životinje su prikupljane pomoću komercijalnih koćarica. Ulovljeni morski psi su morfometrijski obrađeni nakon čega su izolirane gonade. Na prikupljenim uzorcima testisa izvršena je histološka analiza i stereološka mjerenja, kako bi se utvrdili razvojni stadiji gonada. Rezultati pokazuju da se ukupna duljina životinja kretala u rasponu između 30,0 cm i 81,6 cm (srednja dužina ± SD: 53,50 ± 14,13). Na temelju morfometrijske analize zaključeno je da mužjaci dostižu spolnu zrelost kod veličina tijela većih od 55 cm. Histološkom analizom gonada identificirano je šest stadija spermatogeneze te su formirane 4 skupine jedinki prema vremenu ulova. Stereološkim mjerenjima na histološkim preparatima utvrđena je visoka razina zrelih spermatocista u skupini ulovljenoj između studenog i prosinca, što upućuje da se ova vrsta razmnožava u tom dijelu godine.
Abstract (english)
In period between years 2005 and 2007 in the northern Adriatic Sea, 61 specimens of the male spiny dogfish (Squalus acanthias L.) were collected by on-board observers on five commercial bottom trawls. Fishing vessels operated in area between 44°32’ and 43°44’ N, and 15°05’ and 14°40’ E. The collected specimens were measured and gonads were isolated. On the collected testicles we utilized morphometric and histological examination in order to analyze development of gonads. Morphometric results showed that the total body length of the specimens ranged from 30,0 cm to 81,6 cm (average ± SD: 53,50 ± 14,13) and the length at which males reach sexual maturity is over 55 cm. Histological analyses of the gonads identified six stages of the spermatogenesis. Based on the period in which specimens were collected, the sample was divided in 4 groups. Stereological analyses on testical histological slides showed high level of mature spermatocyst in a group of November-December, indicating those months to be the species’ mating activity period.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:217:245585
Study programmeTitle: Biology; specializations in: Ecology
Course: Ecology
Study programme type: university
Study level: graduate
Academic / professional title: magistar/magistra biologije (magistar/magistra biologije)
Type of resourceText
File originBorn digital
Access conditionsOpen access
Terms of useLicence In copyright icon
Created on2018-04-20 08:58:58