scholarly journals Comparison of spring and summer clutches of Great Crested Grebes (Podiceps cristatus)

2020 ◽  
Vol 66 (4) ◽  
Author(s):  
Josef Rajchard ◽  
Josef Navrátil ◽  
Ryan J. Frazier ◽  
Eva Ježková ◽  
Kateřina Marková
Keyword(s):  
Czech Republic ◽  
Egg Volume ◽  
Spring Season ◽  
Nested Anova ◽  
Littoral Vegetation ◽  
Podiceps Cristatus ◽  
South Bohemia ◽  
Great Crested Grebe

The intensively farmed fishponds of the Třeboň Basin in South Bohemia, Czech Republic host a substantial number Great Crested Grebe (Podiceps cristatus) pairs that nest later than the expected spring season and instead in summer, which may be associated with fishpond farming. A two-factor nested ANOVA of Great Crested Grebe egg and clutch characteristics showed no differences between spring (May-June) and summer (July - August) seasonal clutches. High egg total volume in spring nests was significantly related to both decreasing distance between nests and decreasing number of nests on the fishpond. The increase of total egg volume in summer nests was significantly related to the distance to the edge of littoral vegetation. There is no substantial difference between spring and summer egg characteristics, but total egg volume in spring nests is dependent on other characteristics that those in summer nests.

TERRITORY IN THE GREAT CRESTED GREBE PODICEPS CRISTATUS RE-EXAMINED.

Ibis ◽  
2008 ◽  
Vol 98 (3) ◽  
pp. 370-378 ◽  
Author(s):  
L. McCartan ◽  
K. E. L. Simmons
Keyword(s):  
Podiceps Cristatus ◽  
Great Crested Grebe

scholarly journals Determination of total mercury in muscle, intestines, liver and kidney tissues of cormorant (Phalacrocorax carbo), great crested grebe (Podiceps cristatus) and Eurasian buzzard (Buteo buteo)

2012 ◽  
Vol 50 (No. 2) ◽  
pp. 61-68 ◽  
Author(s):  
P. Houserova ◽  
J. Hedbavny ◽  
D. Matejicek ◽  
S. Kracmar ◽  
J. Sitko ◽  
...  
Keyword(s):  
Mercury Concentration ◽  
Total Mercury ◽  
Adult Population ◽  
The United States ◽  
Phalacrocorax Carbo ◽  
Buteo Buteo ◽  
Carson River ◽  
Liver And Kidney ◽  
Podiceps Cristatus ◽  
Great Crested Grebe

The total mercury concentrations in four tissues (muscle, intestines, liver and kidney) of aquatic birds (cormorant – Phalacrocorax carbo and great crested grebe – Podiceps cristatus) and Eurasian buzzard (Buteo buteo) were determined by cold vapour atomic absorption spectrometry (CV-AAS) using an Advanced Mercury Analyser AMA 254. The results of the direct CV-AAS analyses of homogenised solid samples were in very good agreement with those obtained by CV-AFS and CV-AAS analyses after acid digestion. Mercury concentrations in the tested tissues of adult populations of great crested grebe and cormorant were nearly twice as high as in the Eurasian buzzard. Significantly higher mercury concentrations were found in the liver and kidney of the cormorant (7-times and 2-times, respectively) compared to great crested grebe. The highest mercury concentration (39.2 mg/kg DM) was found in liver of adult population of cormorant while the content of mercury in younger cormorants was approx. 6-times lower (5.8 mg/kg DM). The total mercury concentration in liver was 6-times higher (2–3-times in muscle and kidney) but 13-times lower then those of the cormorant population living in Japan (Tokyo, Lake Biwa) and in the United States (Nevada, Carson River), respectively.

scholarly journals Occurrence of Strongyloides papillosus associated with extensive pulmonary lesions and sudden deaths in calves on a beef farm in a highland area of South Bohemia (Czech Republic)

2007 ◽  
Vol 44 (1) ◽  
pp. 10-13 ◽  
Author(s):  
M. Kváč ◽  
J. Vítovec
Keyword(s):  
Czech Republic ◽  
Winter Season ◽  
Clinical Signs ◽  
Granulomatous Inflammation ◽  
Management Systems ◽  
Highland Area ◽  
High Prevalence ◽  
Beef Herds ◽  
Inflammatory Infiltrates ◽  
South Bohemia

AbstractPrevalence and intensities of excretion of Strongyloides papillosus eggs were determined in a highland area of South Bohemia (Czech Republic) in cattle of beef herds under three types of management systems (pasture, semipasture, cowshed during winter season). Strongyloides papillosus infection was found on 6 of 9 examined farms and from the 1902 fecal samples, 4.3 % were positive. Eggs excretion intensities were generally low. The high prevalence (57 %) and high intensities of excretion (more than 5.000 EPG) were found on one cowshed farm associated with 25 % mortality of calves without previous clinical signs was observed. Pulmonary pathological changes caused by migration of larvae were histologically characterized as suppurative granulomatous inflammation with young connective tissue and predominance of eosinophils in inflammatory infiltrates. The cause of death of calves was determined as the sudden death syndrome.

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