magistrsko delo
Tadej Pasarič (Author), Jan Podlesnik (Mentor), Tina Klenovšek (Co-mentor)

Abstract

Onthophagus ovatus in Anoplotrupes stercorosus sta vrsti koprofagnih hroščev. To pomeni, da se prehranjujeta z iztrebki živali. Koprofagni hrošči imajo več strategij prehranjevanja in razmnoževanja. Poznamo endokopride, parakopride in telekopride. Obe raziskovani vrsti spadata med parakopride, kar pomeni, da hrošči neposredno pod iztrebkom izkopljejo različno globoke tunele, v katere shranijo kroglico iztrebka za odlaganje jajčec. Zaradi njihove skupne lastnosti – kopanja tunelov smo se v magistrski nalogi odločili preveriti in primerjati kopalne strukture izbranih vrst hroščev. Natančneje smo pri teh dveh vrstah govnačev raziskovali sprednje tibije in glave. Analizo velikosti in oblike struktur smo opravili z geometrijsko morfometrijo. Raziskave so potekale na zbirki hroščev. V raziskavo je bilo vključeno 270 osebkov (139 osebkov vrste O. ovatus in 131 osebkov vrste A. stercorosus). Osebki vrste O. ovatus so bili razvrščeni glede na lokacijo, mesec in spol. Osebki vrste A. stercorosus so bili razvrščeni glede na lokacijo in mesec. Tibije in glave smo glede na omenjene dejavnike primerjali za vsako vrsto posebej. Ugotovili smo, da se tibije in glave znotraj posamezne vrste ne razlikujejo po velikosti, lahko pa se razlikujejo po obliki glede na mesec nabiranja, spol ali lokacijo. Na obliko verjetno vpliva različna trdnost tal, različna globina kopanja tunelov in pojavljanje več generacij v enem letu. Poleg opravljene znotrajvrstne primerjave smo vrsti O. ovatus in A. stercorosus primerjali tudi med sabo. Primerjali smo velikost in obliko kopalnih struktur. Ugotovili smo, da so kopalne strukture osebkov vrste A. stercorosus večje od kopalnih struktur osebkov vrste O. ovatus. Vrsti se močno razlikujeta tudi v obliki glave in tibije.

Keywords

magistrska dela;govnači;Onthophagus ovatus;Anoplotrupes stercorosus;kopalne strukture;koprofagni hrošči;geometrijska morfometrija;

Data

Language: Slovenian
Year of publishing:
Typology: 2.09 - Master's Thesis
Organization: UM FNM - Faculty of Natural Sciences and Mathematics
Publisher: [T. Pasarič]
UDC: 595.76(043.2)
COBISS: 206409731 Link will open in a new window
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Downloads: 2
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Other data

Secondary language: English
Secondary title: Comparison of digging structures of two coprophagous beetles Onthophagus ovatus (Linnaeus, 1767) and Anoplotrupes stercorosus (Hartmann v Scriba, 1791)
Secondary abstract: Onthophagus ovatus and Anoplotrupes stercorosus are species of coprophagous beetles. This means they feed on animal faeces. Coprophagous beetles have multiple feeding and reproductive strategies. We distinguish endocoprids, paracoprids, and telecoprids. Both investigated species belong to the paracoprids, meaning they directly dig tunnels of varying depths beneath the dung. They use these tunnels for depositing dung balls as source of food for their offspring (brooding ball). Due to their tunnelling behaviour, we decided to examine and compare their digging structures in our master's thesis. Specifically, we researched the front tibiae and heads of these two dung beetles. We conducted the analysis using geometric morphometrics. The research was conducted on a beetle collection. The study included 270 specimens (139 specimens of O. ovatus and 131 specimens of A. stercorosus). Individuals of O. ovatus were classified according to location, month, and gender. Individuals of A. stercorosus were classified by location and month. We compared the tibiae and heads based on these factors for each species separately. We found that within each species, the tibiae and heads do not differ in size, but they may differ in shape depending on the month of collection, gender, or location. Shape is likely influenced by different soil hardness, tunnelling depth, and the occurrence of various generations throughout the year. In addition to intra-specific comparisons, we also compared both species, O. ovatus and A. stercorosus. We compared the size and shape of digging structures and found that the digging structures of A. stercorosus individuals are larger than those of O. ovatus individuals. There were also significant differences in head and tibia shape between the species.
Secondary keywords: master theses;dung beetles;Onthophagus ovatus;Anoplotrupes stercorosus;digging structures;coprophagous beetles;geometric morphometrics.;Govnači (družina);Univerzitetna in visokošolska dela;
Type (COBISS): Master's thesis/paper
Thesis comment: Univ. v Mariboru, Fak. za naravoslovje in matematiko, Oddelek za biologijo
Pages: XI, 87 str.
ID: 24528205