Dinamika populacija Copepoda (Crustacea) u planktonu jezera Visovac

master's thesis

• Title (english): Copepod (Crustacea) dynamics in a plankton of the Visovac lake
• Author: Zoran Šargač
• Mentor: Ivančica Ternjej (mentor)
• Committee member: Duje Lisičić (predsjednik povjerenstva)
• Committee member: Ivan Radosavljević (član povjerenstva)
• Committee member: Ivana Maguire (član povjerenstva)
• Granter: University of Zagreb; Faculty of Science; (Department of Biology); Zagreb
• Defense date and country: 2017-09-28, Croatia
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Biology

Abstract

Istraživanje zooplanktona jezera Visovac provedeno je u razdoblju od travnja do rujna 2016. godine. Utvrđeno je 9 vrsta slatkovodnog zooplanktona: 4 iz skupine Copepoda (3 iz Cyclopoida i 1 iz Calanoida), te 5 iz skupine Cladocera. Brojnost i biomasa zooplanktona ovise o sezoni, fizikalno-kemijskim parametrima i dubini jezera. Maksimalna brojnost zooplanktona zabilježena je u travnju (2735 nauplija/10 L), dok je najveća biomasa zabilježena u rujnu (6688,7 µg/10 L). Skupina Copepoda prevladavala je brojnošću i biomasom tijekom svih istraživanih mjeseci, osim u lipnju kada brojnošću i biomasom dominirala skupina Cladocera. Unutar skupine Copepoda, očita je dominacija Calanoida, dok vrsta Eudiaptomus hadzici prevladava u uzorcima. Velika brojnost kopepoditnih stadija 1, 2 i 3 iz skupine Calanoida upućuje na to da postoje 2 godišnje generacije potomaka. Povećan broj ženki u odnosu na mužjake kod Eudiaptomus hadzici ukazuje na povećanu trofiju jezera.

Abstract (english)

Research on zooplankton of the Visovac lake was conducted from April to September 2016. Nine species of freshwater zooplankton ware determined: 4 Copepoda species (3 Cyclopoida and 1 Calanoida), and 5 Cladocera species. Abundance and biomass of the zooplankton depended on season, physical-chemical parameters and depth of the lake. Maximum zooplankton abundance was documented in April (2735 nauplius/10 L), while maximum biomass was documented in September (6688,7 µg/10 L). Copepods prevail in biomass and abundance during all months, with exception in June when Cladocera overcome. In Copepoda group, there is obvious dominance of Calanoida, whereas species Eudiaptomus hadzici
prevails in samples. High amount of copepodite instars 1, 2 and 3 from Calanoida group indicates 2 annual offspring generations. Increased number of females in relation to males in
species Eudiaptomus hadzici indicates increased trophic level of the lake.

• Keywords: zooplankton; Visovačko jezero; veslonošci
• Keywords (english): zooplankton; Visovac lake; copepods
• Language: croatian
• URN:NBN: urn:nbn:hr:217:726912
• Study programme: Title: Experimental Biology; Study programme type: university; Study level: graduate; Academic / professional title: magistar/magistra eksperimentalne biologije (magistar/magistra eksperimentalne biologije)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access; Embargo expiration date: 2019-10-23
• Created on: 2017-10-23 13:30:13