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Start Over Creator Chytil, Josef Date Unknown

2. I ptáky trápí bradavice: papillomatóza u pěnkavy obecné

Creator:
Literák, Ivan and Chytil, Josef
Type:
article and TEXT
Language:
Czech
Description:
Papillomavirus FPV (Fringilla coelebs Papillomavirus) vyvolává u pěnkavy obecné (Fringilla coelebs) vznik nahloučených, mnohočetných papillomatózních (bradavicovitých) útvarů na nohách v oblasti běháku a prstů a výjimečně také na zobáku. V Česku bylo od r. 2004 zaznamenáno 7 nových případů papillomatózy pěnkavy obecné, na Slovensku první případ v r. 2007. Ve všech těchto případech byly papillomy na nohách. and In the Chaffinch (Fringilla coelebs), the Papillomavirus FPV (Fringilla coelebs papillomavirus) induces the development of aggregated, numerous wart-like (verruciform) lesions on feet, namely on toes and on tarsometatarsus (hock) and exceptionally also on bills. From the Czech Republic seven new cases of chaffinch papillomatosis have been reported since 2004. In Slovakia the first finding was made in 2007.
Rights:
http://creativecommons.org/licenses/by-nc-sa/4.0/

3. Letnění rybníka Nesyt v roce 2007

Creator:
Sychra, Jan, Danihelka, Jiří, Heralt, Přemysl, Horal, David, Horsák, Michal, Chytil, Josef, Kubíček, František, Květ, Jan, Macháček, Petr, Přikryl, Ivo, and Roleček, Jan
Type:
article and TEXT
Language:
Czech
Description:
Letnění, v minulosti tradiční součást obhospodařování rybníků, se v současné době v českém rybníkářství již prakticky nevyužívá. Intenzifikace produkce ryb vede ovšem ke snižování biodiverzity rybničních ekosystémů. V roce 2007 bylo proto uskutečněno částečné letnění rybníka Nesyt v národní přírodní rezervaci Lednické rybníky. Cílem bylo vytvořit optimální podmínky pro vzácnou a často kriticky ohroženou květenu obnaženého rybničního dna a některé druhy vodního ptactva, např. celoevropsky ustupující bahňáky. and Summer drainage, a traditional fishpond management method in the past, is now hardly used in the Czech Republic. Moreover, fish production intensification has resulted in biodiversity decline and loss in many fishpond ecosystems. In 2007, the Nesyt fishpond in the Lednice Fishponds National Nature Reserve (South Moravia) was partially drained. This measure is intended to establish optimal conditions for rare and often endangered flora in the exposed fishpond bottom and some bird species declining in Europe, e.g. waders.
Rights:
http://creativecommons.org/licenses/by-nc-sa/4.0/

4. Mark-recapture results and changes in bat abundance at the cave of Na Turoldu, Czech Republic

Creator:
Gaisler, Jiří and Chytil, Josef
Type:
article and TEXT
Subject:
hibernating bats, fluctuation in numbers, summer bat community, and results of banding
Language:
English
Description:
Between 1958-2000, 3,148 records of hibernating bats were made in a natural limestone cave, 92 % of them concerning Rhinolophus hipposideros. Other species included Myotis myotis, M. mystacinus, M. brandtii, M. emarginatus, M. nattereri, M. daubentonii, Plecotus auritus, P. austriacus and Myotis blythii (which was not recorded after 1973). The abundance of R. hipposideros (and of all bats combined) decreased between 1958-1963, probably due to the impact of mark-recapture work, and between 1970-1974 due to the devastation of the cave. After the cave was put under protection and the marking of bats was stopped, the hibernating assemblage recovered so that, between 1984-2000, numbers of bats showed significant increases resulting in numbers more than twice those at the beginning of the monitoring period. Between 1991-2000, 517 bats were netted and banded from spring until autumn in front of the cave. Nettings of species not found in winter (Myotis bechsteinii, Eptesicus serotinus, Vespertilio murinus, Nyctalus noctula and Barbastella barbastellus) increased the total number of species to 15. In N. noctula and V. murinus echolocation signals were also detected and, in the latter a display flight with mating calls was recorded. Samples of netted bats were compared with samples of bats observed in the same winter, and significant differences were found in species composition, diversity and in the dominance values of individual species. It is suggested that considerable numbers of bats other than R. hipposideros occur at the locality in winter, but have remained undetected due to their hidden hibernation. We analysed 1,038 individuals marked at Turold and 237 recaptured, plus 10 of bats marked elsewhere and recaptured at Turold. The longest movement recorded (66 km) was in a female M. blythii, the highest age (19.5 years) was in a male R. hipposideros.
Rights:
http://creativecommons.org/licenses/by-nc-sa/4.0/