The Experts below are selected from a list of 63 Experts worldwide ranked by ideXlab platform
Thomas D Seeley - One of the best experts on this subject based on the ideXlab platform.
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An oligarchy of nest-site scouts triggers a honeybee swarm’s departure from the hive
Behavioral Ecology and Sociobiology, 2010Co-Authors: Juliana Rangel, Sean R. Griffin, Thomas D SeeleyAbstract:Animals that travel in groups must synchronize the timing of their departures to assure cohesion of the group. While most activities in large colonies of social insects have decentralized control, certain activities (e.g., colony migration) can have centralized control, with only a special subset of well-informed individuals making a decision that affects the entire colony. We recently discovered that a small minority of individuals in a honeybee colony—an oligarchy—decides when to trigger the departure of a swarm from its hive. The departure process begins with some bees producing the worker-piping Signal (the primer for departure) and is followed by these bees producing the buzz-Run Signal (the releaser for departure). In this study, we determined the identity of these Signalers. We found that a swarm’s nest-site scouts search for potential nest cavities prior to the departure of the swarm from its hive. Furthermore, we found that the predeparture nest-site scouts are the sole producers of the worker-piping Signal and that they are the first producers of the buzz-Run Signal. The control of the departure of a honeybee swarm from its hive shows how a small minority of well-informed individuals in a large social insect colony can make important decisions about when a colony should take action.
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An oligarchy of nest-site scouts triggers a honeybee swarm's departure from the hive.
Behavioral Ecology and Sociobiology, 2010Co-Authors: Juliana Rangel, Sean R. Griffin, Thomas D SeeleyAbstract:Animals that travel in groups must synchronize the timing of their departures to assure cohesion of the group. While most activities in large colonies of social insects have decentralized control, certain activities (e.g., colony migration) can have centralized control, with only a special subset of well-informed individuals making a decision that affects the entire colony. We recently discovered that a small minority of individuals in a honeybee colony—an oligarchy—decides when to trigger the departure of a swarm from its hive. The departure process begins with some bees producing the worker-piping Signal (the primer for departure) and is followed by these bees producing the buzz-Run Signal (the releaser for departure). In this study, we determined the identity of these Signalers. We found that a swarm’s nest-site scouts search for potential nest cavities prior to the departure of the swarm from its hive. Furthermore, we found that the predeparture nest-site scouts are the sole producers of the worker-piping Signal and that they are the first producers of the buzz-Run Signal. The control of the departure of a honeybee swarm from its hive shows how a small minority of well-informed individuals in a large social insect colony can make important decisions about when a colony should take action.
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the buzz Run how honeybees Signal time to go
Animal Behaviour, 2008Co-Authors: Clare C Rittschof, Thomas D SeeleyAbstract:The explosive take-off of a honeybee swarm when it moves to its new home is a striking example of an animal group performing a synchronized departure for a new location. Prior work has shown that the nest-site scouts in a swarm prime the other bees for flight by producing piping Signals that stimulate all the bees to warm up their wing muscles in preparation for flight, but how the bees are ultimately triggered to take flight remains a mystery. We explored the possibility that the buzz-Run Signal is the critical releaser of flight. Using slow-motion analyses of videorecordings, we made a detailed description of this Signalling behaviour: a buzz-Runner Runs about the swarm cluster in great excitement, tracing out a crooked path, buzzing her wings in bursts, bulldozing between idle bees and periodically performing a conspicuous wiggling movement. It seems likely that the buzz-Run Signal is a ritualized form of a bee's take-off behaviour, with the wing buzzing greatly exaggerated and other behavioural elements (Running, butting and wiggling) added to increase the Signal's detectability. The immediate effect of the Signal is to disperse and activate otherwise lethargic bees; the long-term effect is probably to stimulate the recipients to launch into flight. It turns out that the scout bees from the chosen nest site are responsible for producing both the piping Signal to prime a swarm for take-off and the buzz-Run Signal to trigger the take-off. We suggest that these bees produce the Signal that triggers take-off because they travel throughout the swarm cluster while piping and so are able to sense when the entire swarm is hot enough to take flight. The mechanisms mediating take-offs by honeybee swarms appear to present us with a rare instance where an action of a large social insect colony is controlled by a small set of individuals that actively monitor the global state of their colony and produce a Signal triggering the colony's action in a timely way.
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The buzz-Run: how honeybees Signal ‘Time to go!’
Animal Behaviour, 2007Co-Authors: Clare C Rittschof, Thomas D SeeleyAbstract:The explosive take-off of a honeybee swarm when it moves to its new home is a striking example of an animal group performing a synchronized departure for a new location. Prior work has shown that the nest-site scouts in a swarm prime the other bees for flight by producing piping Signals that stimulate all the bees to warm up their wing muscles in preparation for flight, but how the bees are ultimately triggered to take flight remains a mystery. We explored the possibility that the buzz-Run Signal is the critical releaser of flight. Using slow-motion analyses of videorecordings, we made a detailed description of this Signalling behaviour: a buzz-Runner Runs about the swarm cluster in great excitement, tracing out a crooked path, buzzing her wings in bursts, bulldozing between idle bees and periodically performing a conspicuous wiggling movement. It seems likely that the buzz-Run Signal is a ritualized form of a bee's take-off behaviour, with the wing buzzing greatly exaggerated and other behavioural elements (Running, butting and wiggling) added to increase the Signal's detectability. The immediate effect of the Signal is to disperse and activate otherwise lethargic bees; the long-term effect is probably to stimulate the recipients to launch into flight. It turns out that the scout bees from the chosen nest site are responsible for producing both the piping Signal to prime a swarm for take-off and the buzz-Run Signal to trigger the take-off. We suggest that these bees produce the Signal that triggers take-off because they travel throughout the swarm cluster while piping and so are able to sense when the entire swarm is hot enough to take flight. The mechanisms mediating take-offs by honeybee swarms appear to present us with a rare instance where an action of a large social insect colony is controlled by a small set of individuals that actively monitor the global state of their colony and produce a Signal triggering the colony's action in a timely way.
S. Sriram - One of the best experts on this subject based on the ideXlab platform.
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Design and implementation of an ordered memory access architecture
1993 IEEE International Conference on Acoustics Speech and Signal Processing, 1993Co-Authors: S. SriramAbstract:The authors describe a multiprocessor machine for real-time digital Signal processing that uses commercial programmable DSP chips. The architecture is a shared memory, single shared bus parallel processor designed to Run Signal processing tasks that can be statically scheduled. The design is based on the architecture proposed by J.C. Bier and the authors (1990). A prototype has been built. The implementation details and performance results are discussed.
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ICASSP (1) - Design and implementation of an ordered memory access architecture
IEEE International Conference on Acoustics Speech and Signal Processing, 1993Co-Authors: S. SriramAbstract:The authors describe a multiprocessor machine for real-time digital Signal processing that uses commercial programmable DSP chips. The architecture is a shared memory, single shared bus parallel processor designed to Run Signal processing tasks that can be statically scheduled. The design is based on the architecture proposed by J.C. Bier and the authors (1990). A prototype has been built. The implementation details and performance results are discussed. >
Juliana Rangel - One of the best experts on this subject based on the ideXlab platform.
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An oligarchy of nest-site scouts triggers a honeybee swarm’s departure from the hive
Behavioral Ecology and Sociobiology, 2010Co-Authors: Juliana Rangel, Sean R. Griffin, Thomas D SeeleyAbstract:Animals that travel in groups must synchronize the timing of their departures to assure cohesion of the group. While most activities in large colonies of social insects have decentralized control, certain activities (e.g., colony migration) can have centralized control, with only a special subset of well-informed individuals making a decision that affects the entire colony. We recently discovered that a small minority of individuals in a honeybee colony—an oligarchy—decides when to trigger the departure of a swarm from its hive. The departure process begins with some bees producing the worker-piping Signal (the primer for departure) and is followed by these bees producing the buzz-Run Signal (the releaser for departure). In this study, we determined the identity of these Signalers. We found that a swarm’s nest-site scouts search for potential nest cavities prior to the departure of the swarm from its hive. Furthermore, we found that the predeparture nest-site scouts are the sole producers of the worker-piping Signal and that they are the first producers of the buzz-Run Signal. The control of the departure of a honeybee swarm from its hive shows how a small minority of well-informed individuals in a large social insect colony can make important decisions about when a colony should take action.
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An oligarchy of nest-site scouts triggers a honeybee swarm's departure from the hive.
Behavioral Ecology and Sociobiology, 2010Co-Authors: Juliana Rangel, Sean R. Griffin, Thomas D SeeleyAbstract:Animals that travel in groups must synchronize the timing of their departures to assure cohesion of the group. While most activities in large colonies of social insects have decentralized control, certain activities (e.g., colony migration) can have centralized control, with only a special subset of well-informed individuals making a decision that affects the entire colony. We recently discovered that a small minority of individuals in a honeybee colony—an oligarchy—decides when to trigger the departure of a swarm from its hive. The departure process begins with some bees producing the worker-piping Signal (the primer for departure) and is followed by these bees producing the buzz-Run Signal (the releaser for departure). In this study, we determined the identity of these Signalers. We found that a swarm’s nest-site scouts search for potential nest cavities prior to the departure of the swarm from its hive. Furthermore, we found that the predeparture nest-site scouts are the sole producers of the worker-piping Signal and that they are the first producers of the buzz-Run Signal. The control of the departure of a honeybee swarm from its hive shows how a small minority of well-informed individuals in a large social insect colony can make important decisions about when a colony should take action.
Clare C Rittschof - One of the best experts on this subject based on the ideXlab platform.
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the buzz Run how honeybees Signal time to go
Animal Behaviour, 2008Co-Authors: Clare C Rittschof, Thomas D SeeleyAbstract:The explosive take-off of a honeybee swarm when it moves to its new home is a striking example of an animal group performing a synchronized departure for a new location. Prior work has shown that the nest-site scouts in a swarm prime the other bees for flight by producing piping Signals that stimulate all the bees to warm up their wing muscles in preparation for flight, but how the bees are ultimately triggered to take flight remains a mystery. We explored the possibility that the buzz-Run Signal is the critical releaser of flight. Using slow-motion analyses of videorecordings, we made a detailed description of this Signalling behaviour: a buzz-Runner Runs about the swarm cluster in great excitement, tracing out a crooked path, buzzing her wings in bursts, bulldozing between idle bees and periodically performing a conspicuous wiggling movement. It seems likely that the buzz-Run Signal is a ritualized form of a bee's take-off behaviour, with the wing buzzing greatly exaggerated and other behavioural elements (Running, butting and wiggling) added to increase the Signal's detectability. The immediate effect of the Signal is to disperse and activate otherwise lethargic bees; the long-term effect is probably to stimulate the recipients to launch into flight. It turns out that the scout bees from the chosen nest site are responsible for producing both the piping Signal to prime a swarm for take-off and the buzz-Run Signal to trigger the take-off. We suggest that these bees produce the Signal that triggers take-off because they travel throughout the swarm cluster while piping and so are able to sense when the entire swarm is hot enough to take flight. The mechanisms mediating take-offs by honeybee swarms appear to present us with a rare instance where an action of a large social insect colony is controlled by a small set of individuals that actively monitor the global state of their colony and produce a Signal triggering the colony's action in a timely way.
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The buzz-Run: how honeybees Signal ‘Time to go!’
Animal Behaviour, 2007Co-Authors: Clare C Rittschof, Thomas D SeeleyAbstract:The explosive take-off of a honeybee swarm when it moves to its new home is a striking example of an animal group performing a synchronized departure for a new location. Prior work has shown that the nest-site scouts in a swarm prime the other bees for flight by producing piping Signals that stimulate all the bees to warm up their wing muscles in preparation for flight, but how the bees are ultimately triggered to take flight remains a mystery. We explored the possibility that the buzz-Run Signal is the critical releaser of flight. Using slow-motion analyses of videorecordings, we made a detailed description of this Signalling behaviour: a buzz-Runner Runs about the swarm cluster in great excitement, tracing out a crooked path, buzzing her wings in bursts, bulldozing between idle bees and periodically performing a conspicuous wiggling movement. It seems likely that the buzz-Run Signal is a ritualized form of a bee's take-off behaviour, with the wing buzzing greatly exaggerated and other behavioural elements (Running, butting and wiggling) added to increase the Signal's detectability. The immediate effect of the Signal is to disperse and activate otherwise lethargic bees; the long-term effect is probably to stimulate the recipients to launch into flight. It turns out that the scout bees from the chosen nest site are responsible for producing both the piping Signal to prime a swarm for take-off and the buzz-Run Signal to trigger the take-off. We suggest that these bees produce the Signal that triggers take-off because they travel throughout the swarm cluster while piping and so are able to sense when the entire swarm is hot enough to take flight. The mechanisms mediating take-offs by honeybee swarms appear to present us with a rare instance where an action of a large social insect colony is controlled by a small set of individuals that actively monitor the global state of their colony and produce a Signal triggering the colony's action in a timely way.
Sean R. Griffin - One of the best experts on this subject based on the ideXlab platform.
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An oligarchy of nest-site scouts triggers a honeybee swarm’s departure from the hive
Behavioral Ecology and Sociobiology, 2010Co-Authors: Juliana Rangel, Sean R. Griffin, Thomas D SeeleyAbstract:Animals that travel in groups must synchronize the timing of their departures to assure cohesion of the group. While most activities in large colonies of social insects have decentralized control, certain activities (e.g., colony migration) can have centralized control, with only a special subset of well-informed individuals making a decision that affects the entire colony. We recently discovered that a small minority of individuals in a honeybee colony—an oligarchy—decides when to trigger the departure of a swarm from its hive. The departure process begins with some bees producing the worker-piping Signal (the primer for departure) and is followed by these bees producing the buzz-Run Signal (the releaser for departure). In this study, we determined the identity of these Signalers. We found that a swarm’s nest-site scouts search for potential nest cavities prior to the departure of the swarm from its hive. Furthermore, we found that the predeparture nest-site scouts are the sole producers of the worker-piping Signal and that they are the first producers of the buzz-Run Signal. The control of the departure of a honeybee swarm from its hive shows how a small minority of well-informed individuals in a large social insect colony can make important decisions about when a colony should take action.
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An oligarchy of nest-site scouts triggers a honeybee swarm's departure from the hive.
Behavioral Ecology and Sociobiology, 2010Co-Authors: Juliana Rangel, Sean R. Griffin, Thomas D SeeleyAbstract:Animals that travel in groups must synchronize the timing of their departures to assure cohesion of the group. While most activities in large colonies of social insects have decentralized control, certain activities (e.g., colony migration) can have centralized control, with only a special subset of well-informed individuals making a decision that affects the entire colony. We recently discovered that a small minority of individuals in a honeybee colony—an oligarchy—decides when to trigger the departure of a swarm from its hive. The departure process begins with some bees producing the worker-piping Signal (the primer for departure) and is followed by these bees producing the buzz-Run Signal (the releaser for departure). In this study, we determined the identity of these Signalers. We found that a swarm’s nest-site scouts search for potential nest cavities prior to the departure of the swarm from its hive. Furthermore, we found that the predeparture nest-site scouts are the sole producers of the worker-piping Signal and that they are the first producers of the buzz-Run Signal. The control of the departure of a honeybee swarm from its hive shows how a small minority of well-informed individuals in a large social insect colony can make important decisions about when a colony should take action.
