Morfometrijske značajke riječnog raka (Astacus astacus (Linnaeus, 1758))

master's thesis

• Title (english): Morphometric characteristics of noble crayfish (Astacus astacus (Linnaeus, 1758))
• Author: Anja Eloise Livaić
• Mentor: Ivana Maguire (mentor)
• Committee member: Ivana Maguire (predsjednik povjerenstva)
• Committee member: Biljana Balen (član povjerenstva)
• Committee member: Mirta Tkalec (član povjerenstva)
• Committee member: Ana Galov (član povjerenstva)
• Granter: University of Zagreb; Faculty of Science; (Department of Biology); Zagreb
• Defense date and country: 2019-04-29, Croatia
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Biology

Abstract

Riječni rak (Astacus astacus L.) je jedna od četiri autohtone vrste slatkovodnih deseteronožnih rakova iz porodice Astacidae koja nastanjuje hrvatske rijeke i jezera. Osim domaćih voda, može ga se naći i u velikom dijelu Europe. Slatkovodni rakovi imaju ključnu ulogu u pravilnom funkcioniranju ekosustava i hranidbenih mreža te je stoga važno očuvati populacije diljem Europe koje su u ovom trenutku ugrožene zbog umjetne regulacije vodenih tokova, onečišćenja slatkih voda, unesenih stranih invazivnih vrsta te bolesti poput račje kuge. Poznato je da se organizmi na različite načine prilagođavaju specifičnim okolišnim uvjetima te da neke od tih adaptacija mogu utjecati i na samu morfologiju populacija. Cilj ovog istraživanja je pručiti morfološke karakteristike vrste te usporediti populacije sa različitih lokaliteta u Hrvatskoj. U svrhu ovog istraživanja skupljeno je 230 jedinki te su im izmjereni dijelovi tijela od interesa i potom su dobiveni podaci analizirani u statističkim programima metodama geometrijske morfometrije. Rezultati su pokazali da postoje vidljive razlika u morfometriji s obzirom na filogrupu,slijev i stanište kojoj jedinke pripadaju. Ovo je prvo istraživanje geomorfometrijskih značajki vrste A.astacus na području Hrvatske te će rezultati poslužiti u daljnjem istraživanju genetičkih, ekoloških, evolucijskih i taksonomskih obilježja vrste.

Abstract (english)

Noble crayfish (Astacus astacus L.) is one of the four native species of freshwater crayfish from family Astacidae inhabiting Croatian freshwater ecosystems. Also, A. astacus inhabits big part of the Europe. Freshwater crayfish play a key role in the proper functioning of ecosystems and nutritional networks, and it is therefore important to preserve populations throughout the Europe that are vulnerable due to regulations of water flows, contamination of fresh water, alien invasive species and diseases such as crayfish plague. It is known that organisms adapt to specific environmental conditions in different ways and that some of these adaptations can also affect the population morphology itself. The aim of this thesis is to study morphological characteristics of species and to compare populations from different regions in Croatia. For the purpose of this study, 230 individuals were collected and parts of the body of interest were measured, and then the obtained data were analyzed in statistical programs by methods of geometric morphometry. The results showed that there is a visible difference in morphometry with respect to the filogrup, the basin and the habitat to which the individuals belong. This is the first study of A. astacus geometric morphometrcs in Croatia and the results will serve in the further studies of genetic, ecological, evolutionary and taxonomic characteristics of the species.

• Keywords: Astacus; Astacidae; geometrijska morfometrija; filogrupe
• Keywords (english): Astacus; Astacidae; geometric morphometry; phylogroups
• Language: croatian
• URN:NBN: urn:nbn:hr:217:890822
• 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: 2021-04-29
• Created on: 2019-12-04 14:23:01