[magistrsko delo]
Taja Nardin (Author), Nina Šajna (Mentor), Eva Horvat (Co-mentor)

Abstract

Ličinka hrošča semenarja vrste Megabruchidius dorsalis je oligofagni granivor dveh vrst iz poddružine Caesalpinioideade. Vrsta izvira iz Azije, v Evropi je bila prvič najdena v Italiji leta 1989. Od prve najdbe se je razširila v večini vzhodne, zahodne in osrednje Evrope. Cilj naše magistrskega dela je izmeriti telesno variabilnost hrošča Megabruchidius dorsalis; ovrednotiti telesno variabilnost znotraj populacij in med posameznimi balkanskimi populacijami; primerjati variabilnost izmerjenih morfoloških parametrov med spoloma znotraj in med populacijami; preveriti ali obstajajo biogeografski vzorci po geografski dolžini in širini. Premerili smo 171 hroščev iz šestih lokacij na Balkanskem polotoku (Maribor, Volčji potok, Zagreb, Banjaluka, Nikšić, Tirana). Ker smo meritve opravljali na suhem materialu in se suhim osebkom glava spodviha, smo jih najprej navlažili. Po 24 urah smo osebke preparirali, da so bili pripravljeni za fotografiranje, in izmerili pet telesnih dimenzij (dolžina telesa, dolžina in širina pronotuma, dolžina elitre in širina eliter). Dokazana je prisotnost spolnega dimorfizma, saj so samci večji od samic na petih od šestih lokacij. Razlike v morfoloških parametrih smo zaznali tudi med lokacijami, vedno je bil najmanjši vzorec osebkov iz Banjaluke. Izmerjeni parametri so pokazali tudi geografske vzorce, saj so se osebki večali od juga proti severu in od vzhoda proti zahodu.

Keywords

magistrska dela;Megabruchidius dorsalis;morfološka variabilnost;tujerodna vrsta;spolni dimorfizem;Balkanski polotok;

Data

Language: Slovenian
Year of publishing:
Typology: 2.09 - Master's Thesis
Organization: UM FNM - Faculty of Natural Sciences and Mathematics
Publisher: [T. Nardin]
UDC: 595.76(043.2)
COBISS: 165825027 Link will open in a new window
Views: 14
Downloads: 0
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Other data

Secondary language: English
Secondary title: Morphological variability of Balkan populations of beetle Megabruchidius dorsalis (Fåhræus, 1839)
Secondary abstract: The larva of the seed beetle Megabruchidius dorsalis is an oligophagous granivore of two taxa from the subfamily Caesalpinioideade. The species originates from Asia and was first found in Europe in Italy in 1989. Since its first discovery, it has spread throughout most of Eastern, Western, and Central Europe. The aim of our research was to measure the body variability of beetle Megabruchidius dorsalis; to evaluate morphological variability within and between Balkan populations; to compare the variability of measured morphological parameteres between sexes within and between populations; to check if there are any biogeographical patterns along geographic longitude and latitude. We mearued 171 beetles from six locations in the Balkan (Maribor, Volčji potok, Zagreb, Banjaluka, Nikšić, and Tirana). We did measurements on dry material and because of that the beetles had their head curled towards their abdomen. We had to moist the material and after 24 hours they were prepared to be pinned, photographed, and measured (body length, length and width of pronotum, length of elytron, and width of both elytra). We showed sexual dimorphism as males were larger than females in five out of six locations suggesting sex-role reversal. Differences in morphological parameters were also detected between locations, the smallest specimens were always from Banjaluka. The measured parameter salso shower geographical patterns, as there was an increase in body size on a gradient from south to north and on a gradient from east to west.
Secondary keywords: master theses;Megabruchidius dorsalis;morphological variability;non-native species;sexual dimorphism;Balkan Peninsula;Univerzitetna in visokošolska dela;
Type (COBISS): Master's thesis/paper
Thesis comment: Univ. v Mariboru, Fak. za naravoslovje in matematiko, Oddelek biologijo
Pages: VI, 32 str.
ID: 19919160