Produktivnost gonada u populacijama žute gorgonije Eunicella cavolini (Koch, 1887)

master's thesis

• Title (english): Gonadal output of the yellow gorgonian Eunicella cavolini (Koch, 1887) populations
• Author: Anamarija Dumešić
• Mentor: Tatjana Bakran-Petricioli (mentor)
• Committee member: Tatjana Bakran-Petricioli (predsjednik povjerenstva)
• Committee member: Ines Radanović (član povjerenstva)
• Committee member: Zora Popović (član povjerenstva)
• Committee member: Vesna Petrović Peroković (član povjerenstva)
• Granter: University of Zagreb; Faculty of Science; (Department of Biology); Zagreb
• Defense date and country: 2014-09-30, Croatia
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Biology

Abstract

Žuta gorgonija, Eunicella cavolini, je jedna od najzastupljenijih sredozemnih vrsta kolonijalnih koralja koja značajno pridonosi strukturi i kompleksnosti bentoskih zajednica čvrstoga dna. Cilj ovog istraživanja je bio utvrditi prostornu i vremensku varijabilnost u produktivnosti gonada kod populacija žute gorgonije istočnog Jadrana. Uzorkovanje je provedeno na tri lokacije u 2009. i 2014. godini. Srednja vrijednost ženskog fekunditeta (broja zrelih gonada po polipu) kretala se od 1.55 do 2.07 (maks 5), najveći broj ženskih gonada je imao promjer 500-600 μm (maks 725 μm), a prosječan volumen gonada po polipu iznosio je od 139.45 x 106 μm3 do 200.05 x 106 μm3. Kod ženskih kolonija nije utvrđena značajna prostorna i vremenska varijabilnost fekunditeta, promjera i volumena gonada. Srednja vrijednost fekunditeta muških kolonija se kretala od 2.98 do 7.82 (maks 20), najveći broj muških gonada je imao promjer 300-500 μm (maks 650), a prosječan volumen muških gonada po polipu iznosio je od 15.62 x 106 μm3 do 37.09 x 106 μm3. Kod muških kolonija je utvrđena značajna vremenska varijabilnost fekunditeta unutar populacija, promjer gonada se razlikovao između populacija, a volumen muških gonada se nije značajno razlikovao između populacija u istraživanim godinama. Neznačajna prostorno-vremenska varijabilnost ženskih reproduktivnih karakteristika, utvrđena ovim preliminarnim istraživanjem, čini ih potencijalno dobrim indikatorima negativnih utjecaja na reprodukciju žute gorgonije.

Abstract (english)

The yellow gorgonian, Eunicella cavolini, is one of the most common species of Mediterranean colonial corals, which bestows it among the more important contributors to structure and complexity of hard-bottom benthic communities. The goal of this study was to determine spatial and temporal variability in gonadal output of Eastern Adriatic yellow gorgonian populations. Sampling was conducted at three locations in years 2009 and 2014. The average female fecundity (number of fertile gonads per polyp) ranged from 1.55 to 2.07 (max 5), the majority of female gonads had a diameter of 500-600 μm (max 725) and the average gonadal volume per polyp was between 139.45 x 106 μm3 and 200.05 x 106 μm3. No significant variation was detected in female fecundity, diameter or gonadal volume. The average male fecundity ranged from 2.98 to 7.82 (max 20), the majority of male gonads had a diameter of 300-500 μm (max 650) and the average gonadal volume was between 15.62 x 106 μm3 and 37.09 x 106 μm3. Significant temporal intrapopulational variation was documented in male fecundity, as well as interpopulational gonadal diameter differences, while there were no significant interpopulational variations in gonadal volume. The insignificant spatial and temporal variability of female reproductive traits, as reported in this study, suggests their usage as potential indicators of negative impacts on the reproduction of the yellow gorgonian.

• Keywords: žuta gorgonija; Eunicella cavolini; fekunditet; volumen gonada; promjer gonada; reproduktivne karakteristike; cirkalitoralne zajednice
• Keywords (english): yellow gorgonian; Eunicella cavolini; fecundity; gonad diameter; gonad volume; reproductive traits; sublittoral communities
• Language: croatian
• URN:NBN: urn:nbn:hr:217:652063
• Study programme: Title: Integrated undergraduate and graduate university study of Biology and Chemistry Education; specializations in: Integrated undergraduate and graduate university study of Biology and Chemistry Education; Course: Integrated undergraduate and graduate university study of Biology and Chemistry Education; Study programme type: university; Study level: integrated undergraduate and graduate; Academic / professional title: magistar/magistra edukacije biologije i kemije (magistar/magistra edukacije biologije i kemije)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Access restricted to students and staff of home institution
• Created on: 2017-04-26 09:04:37