Effect of dietary history on selection of prey, and foraging behaviour among patches of prey, by the dogwhelk, Nucella lapillus (L.)

1984 ◽  
Vol 79 (2) ◽  
pp. 159-172 ◽  
Author(s):  
R.N. Hughes ◽  
S. de B. Dunkin
Keyword(s):  
Foraging Behaviour ◽  
Nucella Lapillus ◽  
Dietary History ◽  
Selection Of

An extensive study of the foraging ecology of beavers (Castor canadensis) in relation to habitat quality

2004 ◽  
Vol 82 (6) ◽  
pp. 922-933 ◽  
Author(s):  
D Gallant ◽  
C H Bérubé ◽  
E Tremblay ◽  
L Vasseur
Keyword(s):  
Habitat Quality ◽  
Foraging Behaviour ◽  
Foraging Ecology ◽  
Castor Canadensis ◽  
Central Place ◽  
Foraging Theory ◽  
Extensive Study ◽  
Food Items ◽  
Partial View ◽  
Selection Of

The objective of this study was to examine the foraging behaviour of the beaver (Castor canadensis Kuhl, 1820) and to explain its selection of terrestrial woody plant species according to central place foraging theory. Limitations in variety of food items in most studies with regard to size and (or) distance from the central place and information on availability of forage choices give a partial view of the subject. In this study, the theory is tested in a natural environment with high variability in food items with regard to these factors. Foraging choices by beavers were inspected by measuring variables on cut and uncut trees of every species encountered within 1 m of trail systems made by 25 beaver colonies in Kouchibouguac National Park in New Brunswick, Canada, thereby quantifying the availability of the different food items. The effect of habitat quality (food availability) on the foraging behaviour of beavers was also tested. The results of this study suggest that with increasing distance from the pond, beavers in high-quality habitats selected fewer, but larger, trees and are more species selective. This selectivity was diminished in habitats of lower quality. The results of this study are consistent with the predictions of the central foraging theory.

How Information-Mapping Patterns Determine Foraging Behaviour of a Honey Bee Colony

2002 ◽  
Vol 09 (02) ◽  
pp. 181-193 ◽  
Author(s):  
Valery Tereshko ◽  
Troy Lee
Keyword(s):  
Food Source ◽  
Foraging Behaviour ◽  
Reaction Diffusion ◽  
Reaction Diffusion Equations ◽  
Common Information ◽  
Bee Colony ◽  
Nectar Sources ◽  
Nectar Source ◽  
Honeybee Colony ◽  
Selection Of

We have developed a model of foraging behaviour of a honeybee colony based on reaction-diffusion equations and have studied how mapping the information about the explored environment to the hive determines this behaviour. The model utilizes two dominant components of colony's foraging behaviour — the recruitment to the located nectar sources and the abandonment of them. The recruitment is based upon positive feedback, i.e autocatalytic replication of information about the located source. If every potential forager in the hive, the onlooker, acquires information about all located sources, a common information niche is formed, which leads to the rapid selection of the most profitable nectar source. If the onlookers acquire information about some parts of the environment and slowly learn about the other parts, different information niches where individuals are associated mainly with a particular food source are formed, and the correspondent foraging trails coexist for longer periods. When selected nectar source becomes depleted, the foragers switch over to another, more profitable source. The faster the onlookers learn about the entire environment, the faster that switching occurs.

Reconstructing Greater Sage-Grouse chick diets: Diet selection, body condition, and food availability at brood-rearing sites

The Condor ◽  
2019 ◽  
Vol 121 (1) ◽  
Author(s):  
Kurt T Smith ◽  
Aaron C Pratt ◽  
Jason R LeVan ◽  
Ashleigh M Rhea ◽  
Jeffrey L Beck
Keyword(s):  
Body Condition ◽  
Isotope Analysis ◽  
Field Measurements ◽  
Sage Grouse ◽  
Growth And Survival ◽  
Dietary History ◽  
Brood Rearing ◽  
Big Sagebrush ◽  
Chick Diet ◽  
Selection Of

ABSTRACT Growth and survival of juvenile birds is nutritionally demanding, making the availability of major foods critical to population productivity. Access to nutritious foods for juveniles has important implications because poor foraging conditions during development could result in mortality, or reduced fitness in adulthood. Selection of brood-rearing habitats by female Greater Sage-Grouse (Centrocercus urophasianus) thus has broad implications to survival of juveniles and persistence of populations. Previous research using crop contents demonstrated that invertebrates and forbs comprise the major portion of sage-grouse chick diets for the first few months post-hatch. We coupled stable isotope analysis of feathers and field measurements to quantify chick diet and then correlated that with measures of chick body condition. We sought to reconstruct sage-grouse chick dietary history (2013–2015) using nitrogen stable isotopes to (1) evaluate whether selection of brood-rearing habitats by female sage-grouse was related to chick diet, and (2) assess the relationship between dietary consumption and body condition. Brood-rearing females selected habitats in areas where diet resources occurred in proportion to their availability, with the exception that females selected areas with greater forb abundance 4 weeks after hatch. Diet assimilation by chicks at brood-rearing locations was unrelated to the availability of forbs and invertebrates, but consumption of forbs increased with chick age. Chicks that assimilated proportionally greater amounts of plant-derived nitrogen in their feathers during their first week of life tended to weigh more and have longer wing chords. This relationship was similar between male and female chicks. The importance of quality foods for sage-grouse is well recognized and conservation efforts should aim to maintain functioning sagebrush ecosystems containing adequate brood-rearing habitats for juvenile sage-grouse; there remains a need to identify whether desirable effects are achievable when attempting to improve big sagebrush (Artemisia tridentata) habitats to benefit sage-grouse populations.

Diet, Prey Selection and Foraging Behaviour of the Orange Horseshoe-Bat, Rhinonycteris Aurantius.

1994 ◽  
Vol 21 (2) ◽  
pp. 115 ◽  
Author(s):  
SK Churchill
Keyword(s):  
Foraging Behaviour ◽  
Niche Breadth ◽  
Prey Selection ◽  
Seasonal Abundance ◽  
Light Traps ◽  
Timing Of Reproduction ◽  
Dietary Preferences ◽  
Faecal Analysis ◽  
Horseshoe Bat ◽  
Selection Of

Results of faecal analysis were compared with insect captures in light traps to examine the dietary preferences of R. aurantius in the Northern Territory, Australia. Relative proportions of insects eaten differed significantly from insects available. R. aurantius exhibited a medium niche breadth throughout the year, being neither a specialist not a generalist. It selectively foraged on Lepidoptera and Coleoptera, and was opportunistic in regard to seasonal abundances of Isoptera. This bat had dietary preferences similar to other members of the Hipposideridae. The timing of reproduction and selection of roost sites was related to the seasonal abundance of food resources.

scholarly journals Foraging behaviour and habitat selection of the little penguin Eudyptula minor during early chick rearing in Bass Strait, Australia

2008 ◽  
Vol 366 ◽  
pp. 293-303 ◽  
Author(s):  
AJ Hoskins ◽  
P Dann ◽  
Y Ropert-Coudert ◽  
A Kato ◽  
A Chiaradia ◽  
...  
Keyword(s):  
Habitat Selection ◽  
Foraging Behaviour ◽  
Little Penguin ◽  
Selection Of
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