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Showing 1 to 20 of 106 for “"foragers"”.
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Foragers and trade at Little Muck Shelter, middle Limpopo Valley
… society at Mapungubwe Hill, c. AD 1220. Foragers, who were present during this period, are generally not considered participants of, or contributors to, the socio-political and economic changes that occurred on the southern African landscape. However, research at shelter sites such as …
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Spatiotemporal memories in honey bees: microarray analysis of time-trained foragers
… expression in the brain. Different groups of foragers from the same colony were trained to collect sucrose solution from an artificial feeder at one of two different times of day, one in the morning and the other in the afternoon. Bees from both training groups were collected at both training …
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Experimental evidence that group foragers can converge on predicted producer-scrounger equilibria
When foraging together, animals are often observed to feed from food discoveries of others. The producer-scrounger game predicts how frequently this phenomenon of food parasitism should occur. The game has two major requirements: (i) all individuals must either produce, meaning they invest time …
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Complex Time-Keeping in Honey Bees: a Study of the Subset of Foragers Maintaining Multiple Time-Memories.
… theories of honey bee foraging state that foragers are active at only 1 time of day. It has been shown that a few foragers can be trained to forage at multiple times of day and at many locations. The purpose of the current study was to further investigate the phenomenon of foragers …
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Comparing reversal-learning abilities, sucrose responsiveness, and foraging experience in scout and non-scout honey bee (Apis mellifera) foragers
Honey bees (Apis mellifera) colonies divide foraging activities between scouts, who search for new sources of food, and non-scouts, who rely on information from waggle dances to find food sources. Molecular analyses of scouts and non-scouts have revealed differences in the expression of numerous …
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Dynamics and Communication Structures of Nectar Foraging in Honey Bees (Apis mellifera)
… estimated the number and activity of all nectar foragers in the colony. The total number of active nectar foragers in a colony changed frequently between days. Foraging activity did not usually change between days. A honey bee colony adjusts its daily foraging effort by changing the number of its …
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Time-Memory Behavior Yields Energetically Optimal Foraging Strategy in Honey Bees.
… experiments on honey bee time-memory showed that foragers trained to collect food at a fixed time of day return the following day with a remarkable degree of time-accuracy. A series of field experiments revealed that not all foragers return to a food source on unrewarded test days. Rather, there …
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Biogenic Amines and Division of Labor in the Honey Bee Society
… division of labor. Older bees, notably foragers, had significantly higher levels of all three amines than did all younger bees working in the hive. Some amine level differences were significant in similar aged bees performing different tasks. Soldiers had significantly lower octopamine …
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The Long Term Effect of Time-Memory on Forager Honey Bee (<em>Apis mellifera</em>) Recruitment.
… bee's sensitivity to recruitment. Two groups of foragers from one colony were trained to separate food stations at the same restricted time of day for several consecutive days. Feeding then was canceled at one station but continued for four more days at the other. Bees with more days of training …
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The adaptive benefits of adult structural plasticity in the mushroom bodies of freely behaving forager honey bees
… in older forager honey bees than in younger non-foragers. Additionally, the microglomeruli in the MB calyces reorganize with age such that older individuals have fewer but larger microglomeruli than younger individuals. It is suggested that such changes in MB organization support learning of …
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Bodies, Land, and Instagram: Networked Foraging and Infrastructural Media in the United States
… Acting within this ecological regime, networked foragers use a variety of technologies and techniques to orient themselves within their local environment and develop group-based “skilled vision.” Some networked foragers use their bodies and foraged foods as biotechnologies with which to …
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A HUMAN BEHAVIORAL ECOLOGICAL ASSESSMENT OF THE YELLOWSTONE LAKE BASIN, YELLOWSTONE NATIONAL PARK, WYOMING
… subsistence and settlement strategies of mobile foragers were heavily influenced by the abundance and availability of subsistence resources. This is based on the premise that resource patches comprising of riparian and grassland habitats obtain high productions of subsistence resources which …
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A HUMAN BEHAVIORAL ECOLOGICAL ASSESSMENT OF THE YELLOWSTONE LAKE BASIN, YELLOWSTONE NATIONAL PARK, WYOMING
… subsistence and settlement strategies of mobile foragers were heavily influenced by the abundance and availability of subsistence resources. This is based on the premise that resource patches comprising of riparian and grassland habitats obtain high productions of subsistence resources which …
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The foraging behaviour of granivorous birds: a mechanistic perspective.
… is a well studied phenomenon for some groups of foragers and many mechanistic models of the functional response have been derived to account for variations in foraging behaviour. However, only a few functional response models have been applied to granivorous farmland birds and these models often …
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An investigation of non-spatial cognitive abilities in an asocial corvid, the Clark's nutcracker (Nucifraga columbiana)
… hypothesis, predicts that generalist foragers develop more highly flexible behaviors and a wider cognitive repertoire than specialist foragers. To date, cognitive research on corvids has focused on corvids that are highly social and are generalist foragers. From a comparative …
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From individual behavior to collective structure
… this is achieved is unclear. I investigated how foragers acquire information about their colony's pollen need and how they then adjust their behavior. A detailed documentation of pollen foragers in the hive under different pollen need conditions revealed that individual foragers modulate their …
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Calibration and validation of honey bee foraging flight duration as an estimate of distance flown
… (recruiting) bees nonrandomized the sample of foragers. Additionally, we observed that pollen foragers had significantly longer flight durations (24.5 ± 11.8 minutes) than nectar foragers (16.7 ± 8.8 minutes; p < 0.001), even though pollen foragers had significantly shorter waggle run durations …
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The effects of individual-level differences in metabolic rate on foraging behavior and life history traits in honeybees
… their foraging returns. Many central place foragers such as honeybees maximize their energetic efficiency rather than the rate of energetic gain, given the critical role of energetic costs on foraging decisions. We therefore tested if individuals with low or high metabolic rates differ in …
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Foraging in a Complex World: From Individual Flight Performance to Collective Behavior in Bumblebees (Bombus Impatiens)
… group dynamics. First, I explore how bumblebee foragers cope with structural clutter, with particular emphasis on the allometry of maneuverability and flight performance (Chapter 1). Next, I investigate how the variable, turbulent wind flows that characterize natural environments affect flight …
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Why is Chasmanthe spp. absent from the archaeological record of the south-western Cape?
… archaeological record is due to choices made by foragers regarding field processing of low utility plant parts (i.e. plant waste), rather than its relative importance or more precisely lack thereof, in the diets of early foragers.
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