Reproduktivne značajke smeđe krastače Bufo bufo Linnaeus (Amphibia, Anura) na bjelovarsko-bilogorskom području

master's thesis

• Title (english): Reproductive characteristics of common toad, Bufo bufo Linnaeus (Amphibia; Anura) in Bjelovar- Bilogora county
• Author: Monika Veljković
• Mentor: Milorad Mrakovčić (mentor)
• Committee member: Milorad Mrakovčić (predsjednik povjerenstva)
• Committee member: Renata Šoštarić (član povjerenstva)
• Committee member: Duje Lisičić (član povjerenstva)
• Committee member: Ivana Maguire (član povjerenstva)
• Granter: University of Zagreb; Faculty of Science; (Department of Biology); Zagreb
• Defense date and country: 2015-09-28, Croatia
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Biology

Abstract

Smeđa krastača, Bufo bufo, jedna je od najučestalijih vrsta vodozemaca u Hrvatskoj, ali postoji malo podataka o njezinoj reprodukciji na bjelovarsko-bilogorskom području i u Hrvatskoj. Ovaj rad obuhvaća određivanje reproduktivnog kapaciteta ženki i mužjaka smeđe krastače te istraživanje morfometrije punoglavaca ove vrste. 7 mužjaka i 5 ženki smeđe krastače, sakupljenih na lokacijama Rajić kod Bjelovara i lokaciji kod Grubišnog Polja, iskorišteno je za određivanje ukupnog broja spermija mužjaka i broja jaja/masi jaja ženki. Za 63 punoglavca smeđe krastače, provedeno je određivanje stadija njihova razvoja (prema Gosner 1960) i mjerenje 29 morfometrijskih mjera. Rezultati su pokazali da masa i dužina tijela ne utječu na ukupni broj spermija mužjaka te da se broj spermija smanjuje sa starošću mužjaka. Odnos mase tijela ženki i broja jaja nije statistički značajan, vjerojatno kao posljedica prisustva ženki sa nevijabilnim jajima. Gustoća populacije punoglavaca ne utječe jednako na sve punoglavce te kod manjih punoglavaca može uzrokovati ugibanje ili sporiji razvoj.

Abstract (english)

Common toad, Bufo bufo, is one of the most frequent amphibian species in Croatia, but there is only few data about her reproduction in Bjelovar-Bilogora area and in Croatia. This paper includes research of reproductive capacity of common toad females and males and research of tadpoles morphometry. 7 males and 5 females of common toad, collected on locations Rajić near Bjelovar and location near Grubišno Polje, was used for determination of total number of sperm from males and number of eggs/mass of eggs from females. For 63 tadpoles of common toad was performed determination of stages of their development (according Gosner 1960) and measurement of 29 morphometry measures. Results show that mass and lenght of the body don't affect total number of male sperm and that the number of sperm decrease with age of males. Relation of female body mass and number of eggs is not statisticaly significant, probably because of presence of females with non-viabile eggs. Abundance of population of tadpoles don't have the same effect on all tadpoles and at small
tadpoles can cause mortality or slower development.

• Keywords: reproduktivni kapacitet; morfometrija; lokacija Rajić; lokacija Grubišno Polje
• Keywords (english): reproductive capacity; morphometry; location Rajić; location Grubišno Polje
• Language: croatian
• URN:NBN: urn:nbn:hr:217:718947
• Study programme: Title: Ecology; Study programme type: university; Study level: graduate; Academic / professional title: magistar/magistra ekologije i zaštite prirode (magistar/magistra ekologije i zaštite prirode)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2017-04-24 09:14:54