Rigorous theses

Rigorous theses 15,528 records found  beginprevious15394 - 15403nextend  jump to record: Search took 0.00 seconds. 
Populačně genetická struktura sysla obecného v České republice
ŘÍČANOVÁ, Štěpánka
The European ground squirrel is considered an endangered species with declining numbers throughout Europe. Here, we analysed European ground squirrels from six Czech and one Slovak localities using five microsatellite loci as genetic marker. The results show a strong genetic differentiation among the investigated populations (mean value of FST = 0.16) and high levels of inbreeding (values of FIS ranged from 0.34 to 0.90). One of the most important factors is the lack of migration due to the large distances between the populations and the presence of migration barriers. Based on the results obtained we recommend a few suggestions for a conservation management of this species.
Spermatological characters of bothriocephalideans (Cestoda) inferred from an ultrastructural study on Oncodiscus sauridae and Senga sp.
ŠÍPKOVÁ, Lenka
Spermiogenesis and ultrastructure of the spermatozoon of two bothriocephalidean cestodes, Oncodiscus sauridae and Senga sp., have been studied using transmission electron microscopy. The presence of a classical pattern for spermatological characters (spermiogenesis of type I with dense-material in early stages and sperm of type II with a characteristic ring of cortical microtubules in the anterior part) in Bothriocephalidea is discussed.

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