Utjecaj temperature na rast i razmnožavanje vrste Gammarus balcanicus Schaferna, 1922 (Crustacea, Amphipoda) u rijeci Cetini

master's thesis

• Title (english): Effects of temperature on growth and reproduction of Gammarus balcanicus Schaferna, 1922 (Crustacea, Amphipoda) in the Cetina River
• Author: Ivana Banjeglav
• Mentor: Sanja Gottstein (mentor)
• Committee member: Sanja Gottstein (predsjednik povjerenstva)
• Committee member: Ines Radanović (član povjerenstva)
• Committee member: Vesna Petrović Peroković (član povjerenstva)
• Committee member: Zora Popović (član povjerenstva)
• Granter: University of Zagreb; Faculty of Science; (Department of Biology); Zagreb
• Defense date and country: 2014-11-03, Croatia
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Biology

Abstract

Dinamika populacija i zakonitosti reprodukcije vrste Gammarus balcanicus istraživana je od kolovoza 2004 do rujna 2005 na dva istraživana lokaliteta u gornjem i donjem toku rijeke Cetine koji su pod utjecajem različitih temperatura. Najveća gustoća populacija utvrđena je u fitalu eukrenala rijeke Cetine s temperaturom vode ispod 10°C. Dobiveni rezultati ukazuju na snažnu povezanost između mikrostaništa i gustoće populacija, kao i između gustoće ovigernih ženki i temperature vode. Ovigerne ženke utvrđene su tijekom cijele godine i u gornjem i u donjem dijelu toka rijeke Cetine, s najvećom gustoćom tijekom ljeta (kolovoz) u gornjem dijelu toka a tijekom zime (veljača) u donjem dijelu toka rijeke. Populacije istraživane u ovom radu ukazuju da imaju multivoltini ciklus, s optimumom reproduktivnih uvjeta i najvećim brojem ovigernih ženki u fitalu eukrenala gornjeg dijela toka rijeke. Vrsta je prisutna s najmanjom gustoćom populacije u donjem dijelu toka rijeke koja je s najvećim oscilacijama temperature vode uslijed utjecaja brana. Terenska istraživanja ukazuju da temperatura od 20°C i više u donjem dijelu toka rijeke ima negativan učinak na razmnožavanje i rast istraživane vrste.

Abstract (english)

The reproductive traits of Gammarus balcanicus were examined from August 2004 to September 2005 at two study sites located in the upper and lower reaches of the Cetina River influenced by different water temperature. The highest population density of the species was recorded in fital of the eucrenal zone of the Cetina River, with the water temperature below 10°C. The obtained results pointed out a strong relationship between longitudinal microhabitat distribution and population density, as well as density of ovigerous females and water temperature. The ovigerous females were recorded year-round in the upper and lower reaches of the Cetina River, with the high density during the summer (August) and winter (February) in the upper and lower reaches of the River, respectivelly. The populations studied in this work appears to be multivoltine with the optimal reproductive conditions and highest number of ovigerous female in fital of the eucrenal zone in the upper reaches of the River. The species was represented with the low population density at the lower reaches of the River with high oscilations of water temperature as a consequence of dam influences. Field observations showed that a temperature of 20°C or higher at the lower reaches of the River has a negativ effect on reproduction and growth of the species.

• Keywords: dinamika populacija; ontogenetska struktura; odnos spolova; temperatura
• Keywords (english): population dynamic; ontogeny structure; sex-ratio; temperature
• Language: croatian
• URN:NBN: urn:nbn:hr:217:997903
• 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: Open access
• Created on: 2017-04-25 08:47:38