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National Repository of Grey Literature 1 records found  Search took 0.00 seconds. 
SELECTED ASPECTS OF NEST BIOLOGY OF PODICEPS CRISTATUS IN POND BIOTOPES OF TŘEBOŇ BASIN
 ŠKOLNÍKOVÁ, Hana
The aim of the submitted study was to evaluate the occurrence of great crested grebe (Podiceps cristatus) and its adaptability in the intensively used pond region depending on environmental conditions. The locality under consideration, Nadějská pond system, is situated near the village of Frahelž in Třeboň basin. The investigation was carried out in the years 2007 and 2008, and it was based on periodic counts of Podiceps cristatus on water surface and direct searching for their nests including monitoring of nest parameters. Then the measured parameters were statistically evaluated. In the years 2007 and 2008 the most nests were found on Víra pond or on adjacent ponds (Skutek, Láska). Podiceps cristatus preferred 11 to 20 hectare ponds. 55 % of nests were found in the favoured Typha angustifolia growth, 39 % of nests were found in Bolboschoenus maritimus growth and 5 % of nests in Echinochloa crus-galli growth. Within the years 2007 and 2008 94 nests and 283 eggs were found. The measured parameters of nests and eggs mostly corresponded to literature. In spite of abundance of food, represented mainly by weed species Pseudorasbora parva, and suitable littoral growth a very low success rate in nesting was found. In the year 2007 there was 1 young and in the year 2008 1,06 young for one nesting pair.
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