diplomsko delo
Tatjana Keržan (Author), Lilijana Bizjak-Mali (Mentor)

Abstract

Raziskavo smo naredili na histoloških rezinah testisov dvanajstih osebkov bele podvrste močerila Proteus anguinus anguinus. Preverili smo zastopanost oocitov v testisih, izmerili velikost oocitov ter opisali njihovo morfologijo. Na osnovi razvojnih faz spermatogonijev in/ali spermatocitov smo določili zoritveno fazo testisov. Oocite v testisih smo našli pri 25% osebkov, neodvisno od zrelosti gonad. Oociti so bili tako v testisih z zgodnjimi kot tudi s poznimi fazami spermatogeneze (spermatidiji). V vseh primerih pa so bili oociti v lobulih testisa, ki so vključevali mlajše faze spermatogeneze (med spermatogoniji in spermatociti). Testikularni oociti so veliki, od 58 do 120µm, in z značilnostmi diploten faze prve mejotske delitve, saj so v njihovih jedrih številna jederca in krtačasti kromosomi.

Keywords

oociti;testisi;jamske dvoživke;Proteus anguinus anguinus;

Data

Language: Slovenian
Year of publishing:
Typology: 2.11 - Undergraduate Thesis
Organization: UL BF - Biotechnical Faculty
Publisher: [T. Keržan]
UDC: 597.92(043.2)
COBISS: 11203145 Link will open in a new window
Views: 1000
Downloads: 200
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Other data

Secondary language: English
Secondary title: Analysis of testis-ova in the blind cave salamander (Proteus anguinus)
Secondary abstract: The research was done on histological sections of testes of twelve specimens of white subspecies of blind cave salamander Proteus anguinus anguinus. The testes were analyzed for the presence of testis-ova, including the size and morphology of oocytes. The stage of the testes was also determined, based on the stage of the developing spermatogonia and/or spermatocytes. Oocytes were found in the testes of 25% of specimens independently of the stage of testes. The oocytes were found in the testes with early as well as with late stages of spermatogenesis. In all cases, the oocytes in the testes were located in the lobules with early stages of spermatogenesis (among the spermatogonia and spermatocytes). The testis-ova were large, from 58 to 120µm, with the characteristics of diplotene stage of the first meiotic division. In their nuclei, we found many nucleoli and lampbrush chromosomes.
Secondary keywords: zoology;zoologija;
File type: application/pdf
Type (COBISS): Bachelor thesis/paper
Thesis comment: Univ. v Ljubljani, Pedagoška fak., Kemija in biologija
Pages: 25 str.
ID: 9175035