Do predation rates on artificial nests accurately predict predation rates on natural nests? The effects of nest type, egg type and nest-site characteristics

2003 ◽  
Vol 103 (3) ◽  
pp. 207-214 ◽  
Author(s):  
Lainie Berry ◽  
Alan Lill
Keyword(s):  
Nest Site ◽  
Artificial Nests ◽  
Site Characteristics ◽  
Nest Type ◽  
Predation Rates

scholarly journals Artificial nest predation rates vary depending on visibility in the eastern Brazilian Amazon

2014 ◽  
Vol 44 (3) ◽  
pp. 393-396 ◽  
Author(s):  
Fernanda Michalski ◽  
Darren Norris
Keyword(s):  
Nest Predation ◽  
Generalized Linear Model ◽  
Nest Site ◽  
Experimental Studies ◽  
Basal Area ◽  
Artificial Nest ◽  
Artificial Nests ◽  
Eastern Brazil ◽  
Systematic Biases ◽  
Predation Rates

Observational and experimental studies have shown that increased concealment of bird nests reduces nest predation rates. The objective of the present study was to evaluate differences in predation rates between two experimental manipulations of artificial ground nests (i.e., clearing an area around the artificial nest or leaving it as natural as possible), and test whether environmental variables also affected nest predation in an undisturbed area of Amazonian forest in eastern Brazil. A generalized linear model was used to examine the influence of five variables (manipulation type, perpendicular distance from the main trail, total basal area of trees surrounding the nest site, understorey density, and liana quantity) on nest predation rates. Model results, showed that manipulation type was the only variable that significantly affected nest predation rates. Thus, to avoid systematic biases, the influence of nest site manipulation must be taken into consideration when conducting experiments with artificial nests.

scholarly journals The Use of Power Lines by Breeding Raptors and Corvids in Mongolia: Nest-Site Characteristics and Management Using Artificial Nests

2013 ◽  
Vol 47 (3) ◽  
pp. 282-291 ◽  
Author(s):  
Andrew Dixon ◽  
Gankhuyag Purev-Ochir ◽  
Batbayar Galtbalt ◽  
Nyambayar Batbayar
Keyword(s):  
Nest Site ◽  
Power Lines ◽  
Artificial Nests ◽  
Site Characteristics

scholarly journals Do Repugnant Scents Increase Survival of Ground Nests? A Test with Artificial and Natural Duck Nests

2007 ◽  
Vol 121 (2) ◽  
pp. 150
Author(s):  
Vanessa B. Harriman ◽  
Justin A. Pitt ◽  
Serge Larivière
Keyword(s):  
Human Hair ◽  
Nest Predation ◽  
Survival Rates ◽  
Olfactory Cues ◽  
Artificial Nests ◽  
Treatment Groups ◽  
Mammalian Predators ◽  
High Predation ◽  
Ground Nesting ◽  
Predation Rates

Ground-nesting birds typically experience high predation rates on their nests, often by mammalian predators. As such, researchers and wildlife managers have employed numerous techniques to mitigate nest predation. We investigated the use of scents as repellents to deter predators from both artificial and natural ground nests. Survival rates of artificial nests did not differ among six groups of substances (Wald ?2 df = 5 = 4.53, P < 0.48); however the chronology of predation among groups differed. A commercial Coyote urine based deterrent (DEER-D-TERTM), human hair, and Worcestershire sauce were depredated faster than the control (F4,5 = 40.3, P < 0.001). Nest survival of natural nests differed among those groups tested (Wald ?2 df = 2 = 11.8, P < 0.005); the eight mothball treatment decreased survival (Wald ?2 df = 1 = 11.5, P < 0.005), which indicated that novel smells may attract predators or result in duck nest abandonment when coupled with natural duck scent. Chronologies of predation events among treatment groups were not different for natural nests (F2,3 = 1.9, P = 0.22). These findings indicate an interaction between novel scents and predator olfactory cues.

Breeding Biology and Nest Site Characteristics of the Scarlet Ibis in Southeastern Brazil

Waterbirds ◽  
2001 ◽  
Vol 24 (1) ◽  
pp. 58 ◽  
Author(s):  
Fábio Olmos ◽  
Robson Silva E Silva ◽  
Fabio Olmos
Keyword(s):  
Nest Site ◽  
Breeding Biology ◽  
Southeastern Brazil ◽  
Site Characteristics

scholarly journals Survival probabilities of first and second clutches of blackbird (Turdus merula) in an urban environment

2010 ◽  
Vol 62 (2) ◽  
pp. 489-493 ◽  
Author(s):  
Kornelia Kurucz ◽  
Helena Kallenberger ◽  
Csilla Szigeti ◽  
J.J. Purger
Keyword(s):  
Urban Environment ◽  
Small Mammals ◽  
Breeding Success ◽  
Survival Probability ◽  
Botanical Garden ◽  
Hedera Helix ◽  
Artificial Nests ◽  
The Difference ◽  
The University ◽  
Predation Rates

The breeding success of blackbirds was investigated in April and June 2008 and 2009 in the Botanical Garden of the University of Pecs, with a total of 50 artificial nests at each of the four sessions (with 1 quail egg and 1 plasticine egg placed in every nest). In all four study periods of the two years, 2 nests (4%) were destroyed by predators. Six nests (12%, of the nests) were not discovered in either of the cases. The survival probability of artificial nests was greater in April than in June (both years), but the difference was significant only in 2008. Nests placed into a curtain of ivy (Hedera helix) on a wall were located higher up than those in bushes, yet their predation rates were quite similar. The predation values of quail vs. plasticine eggs did not differ in 2008. In the year 2009, however, significantly more quail eggs were discovered (mostly removed), than plasticine eggs. Marks that were left on plasticine eggs originated mostly from small mammals and small-bodied birds, but the disappearance of a large number of quail and plasticine eggs was probably caused by larger birds, primarily jays.

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