Document Detail


Indirect predator effects on clutch size and the cost of egg production.
MedLine Citation:
PMID:  20528899     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Predator-induced changes in physiology and behaviour may negatively affect a prey's birth rate. Evidence of such indirect predator effects on prey demography remains scarce in birds and mammals despite invertebrate and aquatic studies that suggest ignoring such effects risks profoundly underestimating the total impact of predators. We report the first experimental demonstration of indirect predator effects on the annual 'birth' rate resulting from negative effects on the size of subsequent clutches laid by birds. We manipulated the probability of nest predation and measured the size of subsequent clutches and multiple indices of the mother's physiological condition, while controlling for food availability, date and stage of breeding. Females subject to frequent experimental nest predation laid smaller subsequent clutches and were in poorer physiological condition, particularly regarding non-resource-based indices (e.g. oxidative stress and glucocorticoid mobilization) consistent with both a response to the threat of predation and an increased cost of egg production.
Authors:
Marc Travers; Michael Clinchy; Liana Zanette; Rudy Boonstra; Tony D Williams
Related Documents :
15666719 - Unexpected effects of prey dimensions and morphologies on the size selective feeding by...
16349239 - Role of anaerobic ciliates in planktonic food webs: abundance, feeding, and impact on b...
20349249 - Changes in herbivore control in arable fields by detrital subsidies depend on predator ...
15559279 - Reduced grazing rates in daphnia pulex caused by contaminants: implications for trophic...
11924849 - Food web implications of delta13c and delta15n variability over 370 km of the regulated...
16332209 - Apparent competition, quantitative food webs, and the structure of phytophagous insect ...
1594679 - Analysis of the relationships between self-stimulation sniffing and brain-stimulation s...
2152079 - Cholera outbreak in tumpat, kelantan-1990.
2622999 - Differential effects of clonidine analogs on food intake in rabbits and monkeys.
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2010-05-26
Journal Detail:
Title:  Ecology letters     Volume:  13     ISSN:  1461-0248     ISO Abbreviation:  Ecol. Lett.     Publication Date:  2010 Aug 
Date Detail:
Created Date:  2010-07-16     Completed Date:  2010-10-26     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101121949     Medline TA:  Ecol Lett     Country:  England    
Other Details:
Languages:  eng     Pagination:  980-8     Citation Subset:  IM    
Affiliation:
Department of Biological Sciences, Simon Fraser University, Burnaby, BC V5A1S6, Canada.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Descriptor/Qualifier:
Animals
Clutch Size*
Female
Nesting Behavior*
Population Dynamics
Predatory Behavior*
Reproduction / physiology*
Sparrows / physiology*

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


Previous Document:  Reduction of adaptive genetic diversity radically alters eco-evolutionary community dynamics.
Next Document:  Testing for criticality in ecosystem dynamics: the case of Amazonian rainforest and savanna fire.