Mobbing behaviour in a passerine community increases with prevalence in predator diet

Ibis ◽  
2017 ◽  
Vol 159 (2) ◽  
pp. 324-330 ◽  
Author(s):  
Mylene Dutour ◽  
Jean-Paul Lena ◽  
Thierry Lengagne
Keyword(s):  
Predator Diet ◽  
Mobbing Behaviour

Measuring rodent incisors from scats can increase accuracy of predator diet studies. An illustration based on island cats and rats

2008 ◽  
Vol 331 (9) ◽  
pp. 686-691 ◽  
Author(s):  
Elsa Bonnaud ◽  
Eric Vidal ◽  
Diane Zarzoso-Lacoste ◽  
Franck Torre
Keyword(s):  
Predator Diet

Mobbing behaviour: reciprocity-based co-operation in breeding Pied Flycatchers Ficedula hypoleuca

Ibis ◽  
2006 ◽  
Vol 148 (1) ◽  
pp. 50-54 ◽  
Author(s):  
INDRIKIS KRAMS ◽  
TATJANA KRAMA ◽  
KRISTINE IGAUNE
Keyword(s):  
Ficedula Hypoleuca ◽  
Mobbing Behaviour

Predator diet data from Pullen Pullen Reserve, 2017-2019

UQ eSpace ◽  
2021 ◽  
Author(s):  
Stephen Kearney ◽  
Alex Kutt
Keyword(s):  
Predator Diet

Splitting hairs: How to tell hair of hares apart for predator diet studies

2018 ◽  
Vol 89 ◽  
pp. 84-89 ◽  
Author(s):  
Niccolò Fattorini ◽  
Lucia Burrini ◽  
Giovanni Morao ◽  
Francesco Ferretti ◽  
Giorgia Romeo ◽  
...  
Keyword(s):  
Predator Diet

scholarly journals Is it safe to nest near bold neighbours? Spatial patterns in predation risk associated with the density of American Golden-Plover nest

2016 ◽  
Author(s):  
Marie-Andrée Giroux ◽  
Myriam Trottier-Paquet ◽  
Joël Bêty ◽  
Vincent Lamarre ◽  
Nicolas Lecomte
Keyword(s):  
Predation Risk ◽  
Spatial Patterns ◽  
Bird Species ◽  
Artificial Nests ◽  
Species Of Conservation Concern ◽  
Composition And Structure ◽  
Negative Effect ◽  
Conservation Concern ◽  
Golden Plover ◽  
Mobbing Behaviour

Predation is one of the main factors explaining nesting mortality in most bird species. Birds can avoid nest predation or reduce predation pressure by breeding at higher latitude, showing anti-predator behaviour, and nesting in association with protective species. Plovers actively defend their territory by displaying early warning and aggressive/mobbing behaviour, potentially benefiting the neighbouring nests by decreasing their predation risk. To test for the existence of such a protective effect, we studied the influence of proximity to plover nests on predation risk of artificial nests on Igloolik Island (Nunavut, Canada) in July 2014. We predicted that the predation risk of artificial nests increases and decreases with the distance to and the density of plover nests, respectively. We monitored 18 plover nests and set 35 artificial nests at 30, 50, 100, 200 and 500 m from seven of those plover nests. Surprisingly, we showed that predation risk of artificial nests increases with the density of active plover nests. We also found a significant negative effect of the distance to the nearest active protector nest on predation risk of artificial nests. Understanding how the composition and structure of shorebird communities generate spatial patterns in predation risks represent a key step to better understand the importance of these species of conservation concern in tundra food webs.

scholarly journals Cephalopods in marine predator diet assessments: why identifying upper and lower beaks is important

2011 ◽  
Vol 68 (9) ◽  
pp. 1857-1864 ◽  
Author(s):  
José C. Xavier ◽  
Richard A. Phillips ◽  
Yves Cherel
Keyword(s):  
Marine Science ◽  
Relative Importance ◽  
Future Studies ◽  
Marine Predator ◽  
Predator Diet ◽  
Cephalopod Species ◽  
Diomedea Exulans ◽  
Wandering Albatross ◽  
The World ◽  
Different Parts

AbstractXavier, J. C., Phillips, R. A., and Cherel, Y. 2011. Cephalopods in marine predator diet assessments: why identifying upper and lower beaks is important. – ICES Journal of Marine Science, 68: 1857–1864. Cephalopods are components of the diet of many predators worldwide. They are identified mainly using their chitinized upper and lower beaks, but because it has been assumed that the number of upper and lower beaks would be the same in predator diet samples, more effort has been put into creating keys for the lower beaks, which are more easily identifiable from morphology. A test is made of whether the number of upper and lower beaks differs in diet samples collected from a major cephalopod predator, the wandering albatross (Diomedea exulans), potential biases in the estimation of predator diets are assessed, and upper:lower beak ratios in published studies of other seabirds, seals, whales, and fish from different parts of the world reviewed. The ratio of upper to lower beaks in diet samples from wandering albatrosses varied greatly in a single year (from 69.6% more lower beaks to 59% more upper beaks), and between years (from 0.5 to 32.1% more upper beaks), and biases were greater for certain cephalopod species, resulting in underestimation of their relative importance. Future studies need to consider using both upper and lower beaks to improve the assessment of the contribution of different cephalopods to predator diets.

scholarly journals Sacramento River Predator Diet Analysis: A Comparative Study

2020 ◽  
Vol 18 (1) ◽  
Author(s):  
Dylan Stompe ◽  
◽  
Jason Roberts ◽  
Carlos Estrada ◽  
David Keller ◽  
...  
Keyword(s):  
Comparative Study ◽  
Sacramento River ◽  
Diet Analysis ◽  
Predator Diet

scholarly journals Responsiveness to conspecific distress calls is influenced by day-roost proximity in bats ( Saccopteryx bilineata )

2016 ◽  
Vol 3 (5) ◽  
pp. 160151 ◽  
Author(s):  
Maria Eckenweber ◽  
Mirjam Knörnschild
Keyword(s):  
Group Composition ◽  
Playback Experiments ◽  
Distress Call ◽  
Social Relevance ◽  
The Social ◽  
Saccopteryx Bilineata ◽  
Distress Calls ◽  
Foraging Site ◽  
Physical Distress ◽  
Mobbing Behaviour

Distress calls signal extreme physical distress, e.g. being caught by a predator. In many bat species, distress calls attract conspecifics. Because bats often occupy perennial day-roosts, they might adapt their responsiveness according to the social relevance in which distress calls are broadcast. Specifically, we hypothesized that conspecific distress calls broadcast within or in proximity to the day-roost would elicit a stronger responsiveness than distress calls broadcast at a foraging site. We analysed the distress calls and conducted playback experiments with the greater sac-winged bat, Saccopteryx bilineata , which occupies perennial day-roosts with a stable social group composition. S. bilineata reacted significantly differently depending on the playback's location. Bats were attracted to distress call playbacks within the day-roost and in proximity to it, but showed no obvious response to distress call playbacks at a foraging site. Hence, the bats adapted their responsiveness towards distress calls depending on the social relevance in which distress calls were broadcast. Distress calls within or in proximity to the day-roost are probably perceived as a greater threat and thus have a higher behavioural relevance than distress calls at foraging sites, either because bats want to assess the predation risk or because they engage in mobbing behaviour.

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