scholarly journals Control of energy balance by a wild ungulate, the kudu (Tragelaphus strepsiceros) through adaptive foraging behaviour

1997 ◽  
Vol 56 (1A) ◽  
pp. 15-24 ◽  
Author(s):  
Norman Owen-Smith
Keyword(s):  
Energy Balance ◽  
Foraging Behaviour ◽  
Wild Ungulate ◽  
Tragelaphus Strepsiceros ◽  
Adaptive Foraging

Beavers and lilies: selective herbivory and adaptive foraging behaviour

2013 ◽  
Vol 59 (2) ◽  
pp. 224-232 ◽  
Author(s):  
A. Law ◽  
N. Bunnefeld ◽  
N. J. Willby
Keyword(s):  
Foraging Behaviour ◽  
Selective Herbivory ◽  
Adaptive Foraging

scholarly journals Giving-up diversity (GUDiv): top-down effects of foraging decisions on local, landscape and regional biodiversity of resources

2021 ◽  
Author(s):  
Jana Eccard ◽  
Clara Ferreira ◽  
Andres Peredo Arce ◽  
Melanie Dammhahn
Keyword(s):  
Foraging Behaviour ◽  
Functional Trait ◽  
Spatial Diversity ◽  
Trophic Levels ◽  
Community Effects ◽  
Wild Rodents ◽  
Cascading Effects ◽  
Predation Effects ◽  
Novel Concept ◽  
Adaptive Foraging

Foraging by consumers has direct effects on the community of their resource species, and may serve as a biotic filtering mechanism of diversity. Determinants of foraging behaviour may thus have cascading effects on abundance, diversity, and functional trait composition of the resource community. Here we propose giving-up diversity (GUDiv) as a novel concept and simple measure to quantify community effects of foraging at multiple spatial diversity scales. GUDiv provides a framework linking theories of adaptive foraging behaviour with community ecology. In experimental resource landscapes we showcase effects of patch residency of foraging wild rodents on α-GUDiv, ß-GUDiv and γ- GUDiv, and on functional trait composition of resources. Using GUDiv allows for prediction-based investigation of cascading indirect predation effects (ecology of fear) across multiple trophic levels, of feedbacks between functional trait composition of resource and consumer communities, and of effects of inter-individual differences among foragers on the diversity of resource communities.

Prey killing without consumption: Does Macrolophus pygmaeus show adaptive foraging behaviour?

2008 ◽  
Vol 47 (2) ◽  
pp. 187-193 ◽  
Author(s):  
A.A. Fantinou ◽  
D.Ch. Perdikis ◽  
D.A. Maselou ◽  
P.D. Lambropoulos
Keyword(s):  
Foraging Behaviour ◽  
Macrolophus Pygmaeus ◽  
Prey Killing ◽  
Adaptive Foraging

Energetics of free-ranging large herbivores: when should costs affect foraging behaviour?

2000 ◽  
Vol 78 (9) ◽  
pp. 1604-1615 ◽  
Author(s):  
Helen M Armstrong ◽  
Antony Robertson
Keyword(s):  
Energy Balance ◽  
Foraging Behaviour ◽  
Ovis Aries ◽  
Energetic Cost ◽  
Domestic Sheep ◽  
Net Energy ◽  
Large Herbivores ◽  
Wind Speeds ◽  
Free Ranging ◽  
The Impact

Published relationships were used to build a mathematical model that predicts the daily net energy balance of free-ranging domestic sheep (Ovis aries L.) grazing in the U.K. hills. Net energy balance was predicted for a plausible range of environmental conditions. The behaviour of the model suggested the following predictions. Locomotion will be a relatively unimportant energetic cost. Ambient temperature and rainfall alone will rarely affect energy expenditure, whereas wind will greatly increase energetic costs in winter. These are further increased, but to a relatively small extent, by any concurrent rainfall. Predictions of foraging behaviour based on maximisation of energy intake alone are likely to significantly overestimate dry matter intake from climatically exposed vegetation in winter. Where shelter is available, such models will also overestimate total intake in winter by not taking account of sheltering behaviour. This effect will be most pronounced when forage is of low digestibility or availability, wind speeds are high, or the level of coat insulation is low. Foraging models based instead on maximisation of net energy balance are likely to greatly improve predictions of the impact of large herbivores on vegetation and the mechanisms driving their population dynamics.

scholarly journals Adaptive foraging behaviour of individual pollinators and the coexistence of co-flowering plants

2014 ◽  
Vol 281 (1776) ◽  
pp. 20132437 ◽  
Author(s):  
Zhiyuan Song ◽  
Marcus W. Feldman
Keyword(s):  
Population Dynamics ◽  
Plant Species ◽  
Plant Communities ◽  
Foraging Behaviour ◽  
Adaptive Behaviour ◽  
Native Plant ◽  
Flower Constancy ◽  
Individual Level ◽  
The Individual ◽  
Adaptive Foraging

Although pollinators can play a central role in determining the structure and stability of plant communities, little is known about how their adaptive foraging behaviours at the individual level, e.g. flower constancy, structure these interactions. Here, we construct a mathematical model that integrates individual adaptive foraging behaviour and population dynamics of a community consisting of two plant species and a pollinator species. We find that adaptive foraging at the individual level, as a complementary mechanism to adaptive foraging at the species level, can further enhance the coexistence of plant species through niche partitioning between conspecific pollinators. The stabilizing effect is stronger than that of unbiased generalists when there is also strong competition between plant species over other resources, but less so than that of multiple specialist species. This suggests that adaptive foraging in mutualistic interactions can have a very different impact on the plant community structure from that in predator–prey interactions. In addition, the adaptive behaviour of individual pollinators may cause a sharp regime shift for invading plant species. These results indicate the importance of integrating individual adaptive behaviour and population dynamics for the conservation of native plant communities.

scholarly journals Can bees simultaneously engage in adaptive foraging behaviour and attend to cryptic predators?

2013 ◽  
Vol 86 (4) ◽  
pp. 859-866 ◽  
Author(s):  
Mu-Yun Wang ◽  
Thomas C. Ings ◽  
Michael J. Proulx ◽  
Lars Chittka
Keyword(s):  
Foraging Behaviour ◽  
Adaptive Foraging

scholarly journals Top-down effects of foraging decisions on local, landscape and regional biodiversity of resources (DivGUD)

2021 ◽  
Author(s):  
Jana Eccard ◽  
Clara Ferreira ◽  
Andres Peredo Arce ◽  
Melanie Dammhahn
Keyword(s):  
Foraging Behaviour ◽  
Spatial Scales ◽  
Functional Trait ◽  
Trophic Levels ◽  
Wild Rodents ◽  
Cascading Effects ◽  
Giving Up Density ◽  
Predation Effects ◽  
Novel Concept ◽  
Adaptive Foraging

Foraging by consumers acts as a biotic filtering mechanism for biodiversity at the trophic level of resources. Variation in foraging behaviour have cascading effects on abundance, diversity, and functional trait composition of the community of resource species. Here we propose diversity at giving-up density (DivGUD), when foragers quit exploring a patch, as a novel concept and simple measure to quantify these effects at multiple spatial scales. In experimental landscapes, patch residency of wild rodents decreased local α-DivGUD (via elevated mortality of species with large seeds) and regional γ-DivGUD, while dissimilarity among patches in a landscape (ß-DivGUD) increased. Thus, DivGUD provides a framework linking theories of adaptive foraging behaviour with community ecology allowing to investigate cascading indirect predation effects across multiple trophic levels e.g. the ecology-of-fear framework; feedbacks between functional trait composition of resource species and consumer communities; and effects of inter-individual differences among foragers on the biodiversity of resource communities.

scholarly journals Adaptive behaviour, tri-trophic food-web stability and damping of chaos

2011 ◽  
Vol 9 (71) ◽  
pp. 1373-1380 ◽  
Author(s):  
André W. Visser ◽  
Patrizio Mariani ◽  
Simone Pigolotti
Keyword(s):  
Food Web ◽  
Foraging Behaviour ◽  
Community Dynamics ◽  
Adaptive Behaviour ◽  
General Criterion ◽  
Foraging Effort ◽  
Trophic Transfer Efficiency ◽  
The Face ◽  
Per Capita ◽  
Adaptive Foraging

We examine the effect of adaptive foraging behaviour within a tri-trophic food web with intra-guild predation. The intra-guild prey is allowed to adjust its foraging effort so as to achieve an optimal per capita growth rate in the face of realized feeding, predation risk and foraging cost. Adaptive fitness-seeking behaviour of the intra-guild prey has a stabilizing effect on the tri-trophic food-web dynamics provided that (i) a finite optimal foraging effort exists and (ii) the trophic transfer efficiency from resource to predator via the intra-guild prey is greater than that from the resource directly. The latter condition is a general criterion for the feasibility of intra-guild predation as a trophic mode. Under these conditions, we demonstrate rigorously that adaptive behaviour will always promote stability of community dynamics in the sense that the region of parameter space in which stability is achieved is larger than for the non-adaptive counterpart of the system.

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