Hatching Asynchrony in the House Sparrow: A Test of the Egg-Viability Hypothesis

1992 ◽  
Vol 139 (3) ◽  
pp. 669-675 ◽  
Author(s):  
Jose P. Veiga
Keyword(s):  
House Sparrow ◽  
Hatching Asynchrony ◽  
Egg Viability

Hatching asynchrony that maintains egg viability also reduces brood reduction in a subtropical bird

Oecologia ◽  
2013 ◽  
Vol 174 (1) ◽  
pp. 77-85 ◽  
Author(s):  
Robert A. Aldredge ◽  
Raoul K. Boughton ◽  
Michelle A. Rensel ◽  
Stephan J. Schoech ◽  
Reed Bowman
Keyword(s):  
Hatching Asynchrony ◽  
Brood Reduction ◽  
Egg Viability

Within-Clutch Patterns of Egg Viability and Paternity in the House Sparrow

1999 ◽  
Vol 30 (1) ◽  
pp. 103 ◽  
Author(s):  
Pedro J. Cordero ◽  
Jon H. Wetton ◽  
David T. Parkin
Keyword(s):  
House Sparrow ◽  
Egg Viability

Three hundred years of House Sparrow (Passer domesticus) persecution in Germany

2007 ◽  
Vol 34 (2) ◽  
pp. 307-317 ◽  
Author(s):  
J. SEITZ
Keyword(s):  
Rural Areas ◽  
House Sparrow ◽  
Bird Species ◽  
Passer Domesticus ◽  
Second World War ◽  
Population Increase ◽  
World War ◽  
Large Numbers ◽  
Urban And Rural Areas ◽  
Second World

Modernization of agriculture, economic development and population increase after the end of the Thirty Years' War caused authorities in many parts of Germany to decree the eradication of so-called pest animals, including the House Sparrow. Farmers were given targets, and had to deliver the heads of sparrows in proportion to the size of their farms or pay fines. At the end of the eighteenth century German ornithologists argued against the eradication of the sparrows. During the mid-nineteenth century, C. L. Gloger, the pioneer of bird protection in Germany, emphasized the value of the House Sparrow in controlling insect plagues. Many decrees were abolished because either they had not been obeyed, or had resulted in people protecting sparrows so that they always had enough for their “deliveries”. Surprisingly, various ornithologists, including Ernst Hartert and the most famous German bird conservationist Freiherr Berlepsch, joined in the war against sparrows at the beginning of the twentieth century, because sparrows were regarded as competitors of more useful bird species. After the Second World War, sparrows were poisoned in large numbers. Persecution of sparrows ended in Germany in the 1970s. The long period of persecution had a significant but not long-lasting impact on House Sparrow populations, and therefore cannot be regarded as a factor in the recent decline of this species in urban and rural areas of western and central Europe.

Viability of nematode eggs in high rate algal ponds: the effect of physico-chemical conditions

2000 ◽  
Vol 42 (10-11) ◽  
pp. 371-374 ◽  
Author(s):  
S. Araki ◽  
J. M. González ◽  
E. de Luis ◽  
E. Bécares
Keyword(s):  
Hydraulic Retention Time ◽  
Pilot Scale ◽  
High Rate ◽  
Sterile Water ◽  
Egg Viability ◽  
High Rate Algal Ponds ◽  
Helminth Eggs ◽  
Physico Chemical ◽  
Nematode Eggs ◽  
Chemical Conditions

The viability of Parascaris equorum eggs was studied in two experimental pilot-scale high-rate algal ponds (HRAPs) working in parallel with 4 and 10 days hydraulic retention time respectively. Semi-permeable bags of cellulose (15000 daltons pore size) were used to study the effect of physico-chemical conditions on the survival of these helminth eggs. Three thousand eggs were used in each bag. Replicates of these bags were submerged for 4 and 10 days in the HRAPs and egg viability was compared with that in control bags submerged in sterile water. After 4 days exposure, 60% reduction in viability was achieved, reaching 90% after 10 days, much higher than the 16% and 25% found in the control bags for 4 and 10 days respectively. Ionic conditions of the HRAP may have been responsible for up to 50–60% of the egg mortality, suggesting that mortality due to the ionic environment could be more important than physical retention and other potential removal factors.

House Sparrow (Passer domesticus)

2006 ◽  
Author(s):  
Peter E. Lowther ◽  
Calvin L. Cink
Keyword(s):  
House Sparrow ◽  
Passer Domesticus

The Ineligibility of the European House Sparrow in America

1878 ◽  
Vol 12 (8) ◽  
pp. 499-505
Author(s):  
Elliott Coues
Keyword(s):  
House Sparrow

The Circadian Component in the Photoperiodic Mechanism of the House Sparrow, Passer domesticus

1977 ◽  
Vol 50 (4) ◽  
pp. 247-268 ◽  
Author(s):  
Donald S. Farner ◽  
Richard S. Donham ◽  
Robert A. Lewis ◽  
Philip W. Mattocks ◽  
Thomas R. Darden ◽  
...  
Keyword(s):  
House Sparrow ◽  
Passer Domesticus
Sign in / Sign up

Export Citation Format

Share Document