Populacijski uvjetovana povezanost morfoloških obilježja i fitnesa dagnje (Mytilus galloprovincialis, Lamarck 1819)

master's thesis

• Title (english): Population effect of relantionship between morphological traits and fitness in Mediterannean mussel (Mytilus galloprovincialis, Lamarck 1819)
• Author: Mirela Uzelac
• Mentor: Anamaria Štambuk (mentor)
• Committee member: Anamaria Štambuk (predsjednik povjerenstva)
• Committee member: Nenad Buzjak (član povjerenstva)
• Committee member: Sandra Radić Brkanac (član povjerenstva)
• Committee member: Alan Moro (član povjerenstva)
• Granter: University of Zagreb; Faculty of Science; (Department of Biology); Zagreb
• Defense date and country: 2017-02-27, Croatia
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Biology

Abstract

Morfologija mediteranske dagnje, Mytilus galloprovincialis (Lamarck 1819.) osim genetskim,
uvjetovana je i okolišnim čimbenicima. Prve promjene u kvaliteti okoliša vide se na morfološkim
obilježjima koja utječu na preživljavanje jedinki. Cilj istraživanja bio je analiza varijacija i
fluktuirajuće asimetrije morfoloških obilježja ljušture dviju populacija dagnje Mytilus
galloprovincialis, te utjecaj izlaganja stresnim okolišnim uvjetima na fitnes. U tu je svrhu proveden
mezokozmos eksperiment pod kontroliranim uvjetima s povećanom koncentracijom bakra.
Eksperiment je proveden na uzorku od 800 dagnji na dvije populacije prikupljene s čiste postaje
Marina i onečišćene postaje Gruž. PCA analiza morfoloških obilježja pokazala je odvojeno
grupiranje dva seta podataka što objašnjava populacijsku specifičnost populacija Marina i Gruž. Za
obje populacije morfološka obilježja povezana sa stražnjim mišićima aduktorom i rektraktorom te
duljinom ljušture korelirala su pozitivno s duljim preživljavanjem. Uspoređivanjem 12
morfometrijskih obilježja lijeve i desne ljušture za obje populacije uočena je fluktuirajuća
asimetrija. Stres na stres testom utvrđeno je kraće preživljavanje dagnji s čiste postaje Marina, te
dulje preživljavanje s onečišćene postaje Gruž.

Abstract (english)

The morphology of the Mediterranean mussel, Mytilus galloprovincialis (Lamarck 1819) is under
great impact of genetic and environmental factors. Changes in the environment quality can be seen
on the morphological traits that affect on survival. The aim of this study was to analyze variations
and fluctuating asymmetry of morphological characteristics of two populations mussel Mytilus
galloprovincialis, and the impact of exposure to stressful environmental conditions on fitness. For
this purpose an mesocosmos experiment was conducted under controlled conditions with an
increased Cu content. The experiment was carried out on a sample of 800 mussels on two
populations collected from the clean station Marina and contaminated harbor Gruž. PCA analysis of
morphological characteristics showed a separate grouping of two sets of data which explained the
populations difference between populations Gruž and a Marina. Morphological characteristics
associated with posterior muscle adductor and retractor and with the length of the shell positively
correlated with longer survival. Comparison of 12 morphometric traits of left and right shell from
both populations showed significant fluctuating asymmetry. Stress on stress test showed longer
survival of mussels from contaminated location Gruž than of mussels from clean station Marina.

• Keywords: fluktuirajuća asimetrija; stres na stres test; mezokozmos; morfološka plastičnost
• Keywords (english): fluctuating asymmetry; SOS test; mesocosm; phenotypic plasticity
• Language: croatian
• URN:NBN: urn:nbn:hr:217:854741
• Study programme: Title: Enviromental Sciences; Study programme type: university; Study level: graduate; Academic / professional title: magistar/magistra struke znanosti o okolišu (magistar/magistra struke znanosti o okolišu)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Access restricted to students and staff of home institution
• Created on: 2017-04-20 11:03:31