Demografická struktura a procesy v přírodní populaci křečka polního (Cricetus cricetus) na Olomoucku

0309601 - ÚBO 2009 RIV CZ cze J - Článek v odborném periodiku
Losík, J. - Lisická, L. - Hříbková, J. - Tkadlec, Emil
Demografická struktura a procesy v přírodní populaci křečka polního (Cricetus cricetus) na Olomoucku.
[Demographic structure and processes in a natural population of the common hamster (Cricetus cricetus) in the Olomouc region (Czech Republic).]
Lynx. Roč. 38, 1-2 (2007), s. 21-29. ISSN 0024-7774. E-ISSN 1804-6460
Grant CEP: GA ČR GA206/04/2003
Výzkumný záměr: CEZ:AV0Z60930519
Klíčová slova: demographic structure * common hamster * Czech Republic
Kód oboru RIV: EH - Ekologie - společenstva

V posledni době došlo k poklesu početnosti křečka polního. Studovali jsme po 6 let jeho demografii v přírodní populaci u Olomouce metodou zpětného odchytu do živolovných pastí. Stanovili jsme početnost, míry přežívání, věkovou strukturu a pohlavní strukturu. Populace zatím nejeví známky poklesu.

In last decades, populations of the common hamster (Cricetus cricetus L.) have suffered a widespread decline all over Europe. In the Czech Republic, the hamster became endangered in the 1970s and 1980s but its real demographic status is largely unknown. Between 2001 and 2006, we carried out the first intensive live-trapping capture-mark-recapture study in a natural population (25 ha area) located in the periphery of the Olomouc city, central Moravia. We used the Jolly-Seber model to estimate population size and fitted constrained linear models (Cormack-Jolly-Seber) to estimate survival rates with respect to sex and age. We found that the population was constant over the study period, with the mean spring abundance of about 1.6 individuals per hectare. The maximum density of 8 ind./ha was observed in the summer 2005. Overall, the results do not indicate a decline in the investigated population as relatively high mortality rates are well compensated by good reproductive performance.
Trvalý link: http://hdl.handle.net/11104/0161685