Relative importance of prey abundance and habitat structure as drivers of shorebird breeding success and abundance

2014 ◽  
Vol 17 (6) ◽  
pp. 535-543 ◽  
Author(s):  
David J. T. Douglas ◽  
James W. Pearce-Higgins
Keyword(s):  
Breeding Success ◽  
Habitat Structure ◽  
Prey Abundance ◽  
Relative Importance

The Influence of Habitat, Prey Abundance, Sex, and Breeding Success on the Ranging Behavior of Prairie Falcons

The Condor ◽  
1997 ◽  
Vol 99 (3) ◽  
pp. 567-584 ◽  
Author(s):  
John M. Marzluff ◽  
Bryan A. Kimsey ◽  
Linda S. Schueck ◽  
Mary E. McFadzen ◽  
Mark S. Vekasy ◽  
...  
Keyword(s):  
Breeding Success ◽  
Prey Abundance ◽  
Ranging Behavior

Removing American crows and duck nesting success

1995 ◽  
Vol 73 (3) ◽  
pp. 518-522 ◽  
Author(s):  
Robert G. Clark ◽  
Daryl E. Meger ◽  
Jordan B. Ignatiuk
Keyword(s):  
Breeding Season ◽  
Breeding Success ◽  
Nesting Success ◽  
Relative Importance ◽  
American Crow ◽  
Predator Species ◽  
Game Birds ◽  
American Crows ◽  
Important Predator ◽  
Potential Impact

The American crow (Corvus brachyrhynchs) is reputed to be an important predator of duck eggs, but its potential impact has not been evaluated adequately. We removed breeding crows from their territories prior to and during the duck breeding season to test whether duck nesting success would increase. Nesting success in two removal areas did not differ from that of two control areas. Our results are consistent with several studies indicating that removal of one predator species from a community of predators, including corvids, does not lead to predictable increases in breeding success of game birds. Further work is needed to determine the relative importance of different predators and to learn why removal of one predator species is generally ineffective.

Effects of substrate on prey use by belted kingfishers (Ceryle alcyon): a test of the prey abundance – availability assumption

1996 ◽  
Vol 74 (4) ◽  
pp. 693-697 ◽  
Author(s):  
Jeffrey F. Kelly
Keyword(s):  
Habitat Structure ◽  
Prey Availability ◽  
Pimephales Promelas ◽  
Prey Preference ◽  
Prey Abundance ◽  
Abundance Distribution ◽  
Dynamic Factors ◽  
Prey Resources ◽  
Ceryle Alcyon ◽  
Complex Habitat

Foraging trials were conducted using belted kingfishers (Ceryle alcyon) to examine relationships among prey abundance, availability, and use. Because these relationships are affected by the preference of the predator, I also determined the prey preference of belted kingfishers. Fish (Pimephales promelas and Catostomus commersoni) and crayfish (Orconectes spp.) were exposed to predation by 12 wild belted kingfishers under 4 treatments in which prey availability was manipulated by altering habitat structure. The preferred prey of belted kingfishers were relatively large fish (11–13 cm long). In structurally simple habitats, prey use by belted kingfishers reflected this preference. Complex habitat structure reduced the availability of preferred prey items and resulted in prey use that did not differ from the initial prey abundance distribution. These experiments demonstrated that prey abundance was not equivalent to availability and that habitat structure and prey preference had important effects on the relationships among prey abundance, availability, and use. Thus, evaluating the importance of prey resources to predators on the basis of prey abundance–use comparisons, while ignoring prey availability and the dynamic factors that influence it, may lead to erroneous conclusions.

Climate change and breeding success: decline of the capercaillie in Scotland

2001 ◽  
Vol 70 (1) ◽  
pp. 47-61 ◽  
Author(s):  
Robert Moss ◽  
James Oswald ◽  
David Baines
Keyword(s):  
Climate Change ◽  
Breeding Success

The relative importance of luminal and systemic signals in the control of intestinal iron absorption

2001 ◽  
Vol 120 (5) ◽  
pp. A678-A679
Author(s):  
G ANDERSON ◽  
S WILKINS ◽  
T MURPHY ◽  
G CLEGHORN ◽  
D FRAZER
Keyword(s):  
Iron Absorption ◽  
Relative Importance ◽  
Intestinal Iron Absorption ◽  
Systemic Signals
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