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Variabilita reprodukčních parametrů vybraných druhů sov.
TOMEŠOVÁ, Andrea
This bachelor thesis is focused on reproductive parameters of three owl species: Long-eared owl (Asio otus), Tengmalm´s owl (Aegolius funereus) and Tawny owl (Strix aluco). The main goal is to find information about breeding of this species, compare their reproductive parameters and find out if longitude, latitude and main habitat type have some impact on their reproductive parameters.
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Diet structure of Tengmalm’s owl (Aegolius funereus) in the Ore Moutains in 2014-2015: the effect of laying date on the presence of Apodemus mice and Sorex shrews
Řánková, Kristýna ; Šťastný, Karel (advisor) ; Hanel, Jan (referee)
The study of feed ecology of Tengmalm s owl has been progressing at the department of ecology at the Environmental Science of the Czech University of Agriculture in Prague since 1999. Feed is examined in Loučen part of the area of the Ore Mountains, which is destroyed by imisions, in the surrounding of Fláj barrier with the extent of 70 km2. Researching part is situated in the northwest area of the Czech Republic.
My part of the research of Tengmalms owl s feed was progressed in 2014-2015 and carried out by the method of analysing of pellets and residues which are from nesting boxes. The total amount of the analysed prey animals was 1608 individuals from 32 samples, from which there were 1575 mammals (Mammalia) (97,9 %) and 33 birds (Aves) (2,1 %). In 2014, 6 samples were analysed. In these, 259 pieces of prey were determined. The following year it was 26 samples, in which 1349 pieces of prey were determined.
The substitution of mammals had this composition in 2014-2015: Apodemus sp. - 52,8 %, Microtus agrestis - 25,1 %, Microtus sp. - 8,0 %, Sorex araneus - 3,0 %, Clethrionomys glareolus - 2,7 %, Microtus arvalis - 2,0 %, Muscardinus avellonarius - 0,6 %, Sorex minutus - 0,5 %, Micromys minutus - 0,1 %. The substitution of birds was following: Turdus philomelos - 0,4 %, Phylloscopus sp. - 0,4 %, Aegolius funereus - 0,2 %, Erithacus rebecula - 0,2 %, Pyrrhula pyrrhula - 0,2 %, Fringilla celebs - 0,1 %, Parus major - 0,1 %, Anthus trivialis - 0,1 %, Carduelis cannabina - 0,1 %, Ficedula sp. - 0,1 %, Garrulus glandarius - 0,1 %, Regulus regulus - 0,1 %, Sylvia atricapilla - 0,1 %, Turdus merula - 0,1 %. The first aim was to classify the substitution of Shrews and Apodemus mice in the relation to the time of nesting of Tengmalms owl. Big difference in share of Apodemus mice and Tengmalms owl was given in feed of Tengmalms owl in following 2014-2015. In 2014 Apodemus mice were 19,3 % of feed while they were 59,4 % in 2015. In 2014 Apodemus mice were 18,8 % food of Tengmalms owl, while it was 3,9 % in 2015.
Next it was found out that in 2014 substitution of neither Apodemus mice (Apodemus sp.), nor Tengmalms owl in feed of those ones didnt change during their nesting so much, the influence of the time of their nesting wasnt determined. During nesting time in 2015 share of Apodemus mice in feed of Tengmalms owl was brought down, it means that the couples nesting in the season earlier hunted more Apodemus mice. The substitution of Apodemus mice hasnt changed (the influence on the time of nesting wasnt shown).
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Diet structure of Tengmalm’s owl (Aegolius funereus) in the Ore Moutains in 2014-2015: the effect of laying date on the presence of Microtus voles and birds (Aves)
Šimková, Kristýna ; Šťastný, Karel (advisor) ; Kouba, Marek (referee)
Diet structure of Tengmalm s Owl was studied during 2014-2015 in the Loučeň area of the Ore Mountains specifically around the Flájská dam area of 70 km2. This area is strongly affected by emissions. Diet research was conducted with method of pellets analysis which were taken from nest boxes during nesting period. 32 samples were collected during this two years study. Each sample represents content of diet from one nest box during one
nesting period. 6 samples with 259 individuals were from 2014 while 26 samples with 1349 individuals were collected in 2015. In total 1608 individuals were found during 2014-2015, out of them 33 birds (Aves) and 1575 mammals (Mammalia). Diet content was changing during study years, depending on availability of prey. Main part of diet represented mammals (97,9 %), rest of diet was built by birds (2,1 %). Between 2014-2015 mammals were found in following proportion: Apodemus sp. - 52,8 %, Microtus agrestis - 25,1 %, Microtus sp. - 8,0 %, Sorex araneus - 3,0 %, Clethrionomys glareolus - 2,7 %, Microtus arvalis - 2,0 %, Muscardinus avellanarius - 0,6 %, Sorex minutus - 0,5 %, Micromys minutus - 0,1 % and birds in proportion: Turdus philomelos - 0,4 %, Phylloscopus sp. - 0,4 %, Aegolius funereus - 0,2 %, Erithacus rubecula - 0,2 %, Pyrrhula pyrrhula - 0,2 %, Fringilla coelebs - 0,1
%, Parus major - 0,1 %, Anthus trivialis - 0,1 %, Carduelis cannabina - 0,1 %, Ficedula sp. - 0,1 %, Garrulus landarius - 0,1 %, Regulus regulus - 0,1 %, Sylvia atricapilla - 0,1 %, Turdus merula - 0,1 %. Main objective of this study was to evaluate proportion of voles and birds in diet during study reflecting timing of Tengmalm s Owl s nesting. During two years evaluation was proved difference in proportion of birds in diet of Tengmalm s Owl. In 2014 birds represented 15,3% of diet while in 2015 birds were not represented at all. Proportion of voles (Microtus agrestis, Microtus arvalis and Microtus sp.) in Tengmalm s Owl s diet didn t differ significantly during study period.
It was found that in 2014 neither proportion of voles nor birds in Tengmalm s Owl s diet didn t change significantly during nesting period thus the effect of nesting timing on diet content wasn t proved. During 2015 nesting period the proportions of voles in Tengmalm s Owl s diet significantly grew and impact of nesting timing was proved. Birds were not represented in owl s diet at all in this year.
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Species diversity and abundance of small terrestrial mammals in several types of forest stands in Třeboňsko study area
Dvořák, Jiří ; Kouba, Marek (advisor) ; Šťastný, Karel (referee)
The goal of this thesis was to find the diversity and abundance of small mammals in several types of forest and non-forest ecosystems in the protected landscape area of CHKO Třeboňsko. Further, the goal was to compare the collected data with analogical data from Krušné hory and finally discuss the findings in relation to the abundance of the Tengmalm´s Owl (Aegolius funereus) in both areas.
Trapping by collapsible snap-traps was practiced in both of the abovementioned protected landscape areas. In case of Třeboňsko, six spring and six fall quadrants were established, while the area of one quadrant was designated to 270 m2with 40 traps laid. In contrast, the small mammals in Krušné hory were being caught on three spring and three fall quadrants. The area of one quadrant was designated to be 1 ha with each quadrant containing 121 laid traps. The result numbers of caught individuals were converted into the number of trapped individuals per 100 trap nights. The number of nesting pairs of Tengmalm´s Owl was established by regular visits of hanging nestboxes in both of the protected landscape areas.
In 2014, 42 individuals were caught in Třeboňsko. The following species were recorded: yellow-neck mouse (Apodemus flavicollis), bank vole (Clethrionomys glareolus), and common vole (Microtus arvalis). For this year, the highest diversity of species was recorded in localities "pine north" and "open area south". The highest number of individuals caught (21) was in the quadrant of "pine north".
The year 2015 was more colorful in case of recorded species, however the total number of caught individuals was only insignificantly higher (49 individuals in total). The following species were caught: yellow-neck mouse, wood mouse, bank vole, common shrew (Sorex araneus), and field vole (Microtus agrestis). The highest species diversity was recorded in the quadrant of "spruces north" and the highest number of caught pieces (24) was recorded in the quadrant of "pine north".
In case of Krušné hory, there were 31 caught individuals in 2014 and 193 individuals in 2015. The species diversity of small mammals was equivalent as in the experimental localities in Třeboňsko, additionally, only the eurasian pygmy shrew (Sorex minutus) was recorded.
The following numbers of nesting pairs of Tengmalm´s Owl were recorded through the regular visits of nesting boxes: in the year 2014, there was not a single nesting pair in the area of Třeboňsko; in the year 2015, there were 3 nesting pair. In Krušné hory, for the year 2014, there were 10 nesting pair recorded, and for the year 2015, 34 pair were recorded.
Even though the food supply was similar, there was a significant difference in the numbers of nesting couples in Třeboňsko and Krušné hory. It seems probably, that the Tengmalm´s Owl simply prefers natural nesting cavities over the hanging booths in Třeboňsko.
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Výzkum ekologie a rozšíření‚ návrh managementu populací a záchranných programů zvláště chráněných druhů živočichů: Projekty aktivní podpory ohrožených živočichů v České republice
Agentura ochrany přírody a krajiny ČR, Praha ; Nová, Petra ; Marhoul, Pavel ; Kumstátová, Tereza
Snahou sborníku je pokusit se shrnout dosavadní zkušenosti s aktivní podporou některých ohrožených živočichů a využít je pro další rozvoj a zefektivnění projektů tohoto typu. Realizovaných projektů bylo velké množství, mnohé z nich po sobě nezanechaly žádnou publikační ani jinou stopu, jiné jsou zdokumentovány pouze nedostatečně a nelze je nijak hodnotit. Do hodnocení se tak dostaly zejména projekty hrazené z veřejných rozpočtů, u kterých je stanovena povinnost podání zprávy o realizaci projektu. Hodnoceny byly aktivity realizované od roku 1980, v případě, že byl určitý projekt významný z metodologického hlediska nebo má přímé vazby na současnost, bylo možno zahrnout i projekty starší. Hodnocení celostátně koordinovaných projektů a dále všech, u kterých došlo k jakýmkoliv reintrodukcím. Projekty byly věnovány těmto živočichům: vodní měkkýši, rak říční, motýli, blanokřídlí, ryby, obojživelníci, želva bahenní, ještěrka zelená, ostatní plazi, užovka stromová, hohol severní, drop velký, tetřev hlušec, čáp bílý, moták lužní, puštík bělavý, sova pálená, sýček obecný, sýc rousný, ledňáček říční, netopýři, sysel obecný, bobr evropský, vydra říční a rys ostrovid.
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Hnízdní biologie sýce rousného v imisních oblastech Krušných Hor
Česká zemědělská univerzita v Praze, Praha ; Zárybnická, Markéta
Cílem studie bylo: a) vyhodnocení biotopů využívaných jedinci sýce rousného k hnízdění a k získávání potravy, a to mj. na základě dat získaných prostřednictvím telemetrie jedinců daného druhu (včetně odhadu velikosti domovského okrsku); b) vyhodnocení údajů o množství kořisti přinášené samcem za jednu noc na hnízdo v době inkubace a výchovy mláďat získaných prostřednictvím kamerových systémů umístěných v hnízdních budkách; c) vyhodnocení výše uvedených údajů ve vztahu k údajům o početních stavech populací drobných savců ve studovaném území získaných prostřednictvím odchytu do pastí během hnízdního období.
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