scholarly journals Limited spatial response to direct predation risk by African herbivores following predator reintroduction

2016 ◽  
Vol 6 (16) ◽  
pp. 5728-5748 ◽  
Author(s):  
Andrew B. Davies ◽  
Craig J. Tambling ◽  
Graham I.H. Kerley ◽  
Gregory P. Asner
Keyword(s):  
Predation Risk ◽  
Spatial Response ◽  
African Herbivores

Behavioral adjustments of African herbivores to predation risk by lions: Spatiotemporal variations influence habitat use

Ecology ◽  
2009 ◽  
Vol 90 (1) ◽  
pp. 23-30 ◽  
Author(s):  
M. Valeix ◽  
A. J. Loveridge ◽  
S. Chamaillé-Jammes ◽  
Z. Davidson ◽  
F. Murindagomo ◽  
...  
Keyword(s):  
Habitat Use ◽  
Predation Risk ◽  
Spatiotemporal Variations ◽  
African Herbivores

Individual vigilance of African herbivores while drinking: the role of immediate predation risk and context

2010 ◽  
Vol 79 (3) ◽  
pp. 665-671 ◽  
Author(s):  
Stéphanie Périquet ◽  
Marion Valeix ◽  
Andrew J. Loveridge ◽  
Hillary Madzikanda ◽  
David W. Macdonald ◽  
...  
Keyword(s):  
Predation Risk ◽  
African Herbivores

A Modified Chair Geometry for Whole Body Counting

1976 ◽  
Vol 15 (05) ◽  
pp. 246-247
Author(s):  
S. C. Jain ◽  
G. C. Bhola ◽  
A. Nagaratnam ◽  
M. M. Gupta
Keyword(s):  
Marked Improvement ◽  
Point Of View ◽  
Whole Body ◽  
Spatial Response ◽  
Body Counting ◽  
The Subject ◽  
Whole Body Counting ◽  
The Buddha

SummaryIn the Marinelli chair, a geometry widely used in whole body counting, the lower part of the leg is seen quite inefficiently by the detector. The present paper describes an attempt to modify the standard chair geometry to minimise this limitation. The subject sits crossed-legged in the “Buddha Posture” in the standard chair. Studies with humanoid phantoms and a volunteer sitting in the Buddha posture show that this modification brings marked improvement over the Marinelli chair both from the point of view of sensitivity and uniformity of spatial response.

Elevated nest predation risk promotes offspring size variation in birds with prolonged parental care.

2019 ◽  
Author(s):  
Gretchen F. Wagner ◽  
Emeline Mourocq ◽  
Michael Griesser
Keyword(s):  
Predation Risk ◽  
Reproductive Cycle ◽  
Perceived Risk ◽  
Nest Predation ◽  
Bird Species ◽  
Size Variation ◽  
Egg Laying ◽  
Offspring Size ◽  
Natural Predation ◽  
Risk Spreading

Predation of offspring is the main cause of reproductive failure in many species, and the mere fear of offspring predation shapes reproductive strategies. Yet, natural predation risk is ubiquitously variable and can be unpredictable. Consequently, the perceived prospect of predation early in a reproductive cycle may not reflect the actual risk to ensuing offspring. An increased variance in investment across offspring has been linked to breeding in unpredictable environments in several taxa, but has so far been overlooked as a maternal response to temporal variation in predation risk. Here, we experimentally increased the perceived risk of nest predation prior to egg-laying in seven bird species. Species with prolonged parent-offspring associations increased their intra-brood variation in egg, and subsequently offspring, size. High risk to offspring early in a reproductive cycle can favour a risk-spreading strategy particularly in species with the greatest opportunity to even out offspring quality after fledging.

Sign in / Sign up

Export Citation Format

Share Document