The Experts below are selected from a list of 1770 Experts worldwide ranked by ideXlab platform
Jose Z Abramson - One of the best experts on this subject based on the ideXlab platform.
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contextual imitation of intransitive body actions in a beluga whale delphinapterus leucas a do as other does study
PLOS ONE, 2017Co-Authors: Jose Z Abramson, Ma Victoria Hernandezlloreda, Joseantonio Esteban, Fernando Colmenares, Francisco Aboitiz, Josep CallAbstract:Cetaceans are remarkable for exhibiting group-specific behavioral traditions or cultures in several behavioral domains (e.g., calls, behavioral tactics), and the question of whether they can be acquired socially, for example through imitative processes, remains open. Here we used a "Do as other does" paradigm to experimentally study the ability of a beluga to imitate familiar intransitive (body-oriented) actions demonstrated by a conspecific. The participant was first trained to copy three familiar behaviors on command (training phase) and then was tested for her ability to generalize the learned "Do as the other does" command to a different set of three familiar behaviors (testing phase). We found that the beluga (1) was capable of learning the copy command signal "Do what-the-other-does"; (2) exhibited high matching accuracy for trained behaviors (mean = 84% of correct performance) after making the first successful copy on command; (3) copied successfully the new set of three familiar generalization behaviors that were untrained to the copy command (range of first copy = 12 to 35 trials); and (4) deployed a high level of matching accuracy (mean = 83%) after making the first copy of an untrained behavior on command. This is the first evidence of contextual imitation of intransitive (body-oriented) movements in the beluga and adds to the reported findings on production imitation of sounds in this species and production imitation of sounds and motor actions in several cetaceans, especially dolphins and killer whales. Collectively these findings highlight the notion that cetaceans have a natural propensity at skillfully and proficiently matching the sounds and body movements demonstrated by conspecifics, a fitness-enhancing propensity in the context of Cooperative Hunting and anti-predatory defense tactics, and of alliance formation strategies that have been documented in these species' natural habitats. Future work should determine if the beluga can also imitate novel motor actions.
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Contextual imitation of intransitive body actions in a Beluga whale (Delphinapterus leucas): A “do as other does” study
2017Co-Authors: Jose Z Abramson, Joseantonio Esteban, Fernando Colmenares, Francisco Aboitiz, Mª Victoria Hernández-lloreda, Josep CallAbstract:Cetaceans are remarkable for exhibiting group-specific behavioral traditions or cultures in several behavioral domains (e.g., calls, behavioral tactics), and the question of whether they can be acquired socially, for example through imitative processes, remains open. Here we used a “Do as other does” paradigm to experimentally study the ability of a beluga to imitate familiar intransitive (body-oriented) actions demonstrated by a conspecific. The participant was first trained to copy three familiar behaviors on command (training phase) and then was tested for her ability to generalize the learned “Do as the other does” command to a different set of three familiar behaviors (testing phase). We found that the beluga (1) was capable of learning the copy command signal “Do what-the-other-does”; (2) exhibited high matching accuracy for trained behaviors (mean = 84% of correct performance) after making the first successful copy on command; (3) copied successfully the new set of three familiar generalization behaviors that were untrained to the copy command (range of first copy = 12 to 35 trials); and (4) deployed a high level of matching accuracy (mean = 83%) after making the first copy of an untrained behavior on command. This is the first evidence of contextual imitation of intransitive (body-oriented) movements in the beluga and adds to the reported findings on production imitation of sounds in this species and production imitation of sounds and motor actions in several cetaceans, especially dolphins and killer whales. Collectively these findings highlight the notion that cetaceans have a natural propensity at skillfully and proficiently matching the sounds and body movements demonstrated by conspecifics, a fitness-enhancing propensity in the context of Cooperative Hunting and anti-predatory defense tactics, and of alliance formation strategies that have been documented in these species’ natural habitats. Future work should determine if the beluga can also imitate novel motor actions.
Hiroaki Yamaguchi - One of the best experts on this subject based on the ideXlab platform.
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a Cooperative Hunting behavior by mobile robot troops
The International Journal of Robotics Research, 1999Co-Authors: Hiroaki YamaguchiAbstract:This paper presents a novel feedback-control law for coordinating the motion of multiple holonomic mobile robots to capture/enclose a target by making troop formations. This motion coordination is a Cooperative behavior for security against invaders in surveillance areas. Each robot in this control law has its own coordinate system and it senses a target/invader, other robots and obstacles, to achieve this Cooperative behavior without making any collision. Although there is no centralized controller and each robot has local feedback that is relative-position feedback, all the robots are asymptotically stabilized, and they make formations enclosing a target. Each robot especially has a vector referred to as a “formation vector,” and the formations are controllable by the vectors. As for determining the formation vectors, we use a reactive-control framework in which robots have some reactions heuristically designed according to this Cooperative behavior. Therefore, this robotic system is a hybrid system tha...
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a Cooperative Hunting behavior by mobile robot troops
International Conference on Robotics and Automation, 1998Co-Authors: Hiroaki YamaguchiAbstract:Presents a feedback control law for coordinating motions of multiple holonomic mobile robots to capture/enclose a target by forming troop formations. This motion coordination is a Cooperative behavior for security against invaders in surveillance areas. Each robot, in this control law, has its own coordinate system and it senses a target/invader, other robots and obstacles, to achieve this Cooperative behavior without making any collision. Although there is no centralized controller and each robot has local feedback that is relative position feedback, all the robots are asymptotically stabilized and they form formations enclosing a target. Each robot especially has a vector called "a formation vector" and formations are controllable by the vectors. As for determining the formation vectors, we use a reactive control framework in which robots have reactions heuristically designed according to this Cooperative behavior. Therefore, this robotic system is a hybrid system that consists of a feedback control law and a reactive control framework. The validity of this hybrid system is supported by computer simulations.
John W Durban - One of the best experts on this subject based on the ideXlab platform.
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Cooperative Hunting behavior prey selectivity and prey handling by pack ice killer whales orcinus orca type b in antarctic peninsula waters
Marine Mammal Science, 2012Co-Authors: Robert L Pitman, John W DurbanAbstract:Currently, there are three recognized ecotypes (or species) of killer whales (Orcinus orca) in Antarctic waters, including type B, a putative prey specialist on seals, which we refer to as “pack ice killer whale” (PI killer whale). During January 2009, we spent a total of 75.4 h observing three different groups of PI killer whales Hunting off the western Antarctic Peninsula. Observed prey taken included 16 seals and 1 Antarctic minke whale (Balaenoptera bonaerensis). Weddell seals (Leptonychotes weddellii) were taken almost exclusively (14/15 identified seal kills), despite the fact thattheyrepresentedonly15%of365sealsidentifiedonicefloes;thewhalesentirely avoided taking crabeater seals (Lobodon carcinophaga; 82% relative abundance) and leopard seals (Hydrurga leptonyx; 3%). Of the seals killed, the whales took 12/14 (86%) off ice floes using a Cooperative wave-washing behavior; they produced 120 waves during 22 separate attacks and successfully took 12/16 (75%) of the Weddell seals attacked. The mean number of waves produced per successful attack was 4.1 (range 1–10) and the mean attack duration was 30.4 min (range 15–62). Seal remains that we examined from one of the kills provided evidence of meticulous postmortem prey processing perhaps best termed “butchering.”
Josep Call - One of the best experts on this subject based on the ideXlab platform.
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contextual imitation of intransitive body actions in a beluga whale delphinapterus leucas a do as other does study
PLOS ONE, 2017Co-Authors: Jose Z Abramson, Ma Victoria Hernandezlloreda, Joseantonio Esteban, Fernando Colmenares, Francisco Aboitiz, Josep CallAbstract:Cetaceans are remarkable for exhibiting group-specific behavioral traditions or cultures in several behavioral domains (e.g., calls, behavioral tactics), and the question of whether they can be acquired socially, for example through imitative processes, remains open. Here we used a "Do as other does" paradigm to experimentally study the ability of a beluga to imitate familiar intransitive (body-oriented) actions demonstrated by a conspecific. The participant was first trained to copy three familiar behaviors on command (training phase) and then was tested for her ability to generalize the learned "Do as the other does" command to a different set of three familiar behaviors (testing phase). We found that the beluga (1) was capable of learning the copy command signal "Do what-the-other-does"; (2) exhibited high matching accuracy for trained behaviors (mean = 84% of correct performance) after making the first successful copy on command; (3) copied successfully the new set of three familiar generalization behaviors that were untrained to the copy command (range of first copy = 12 to 35 trials); and (4) deployed a high level of matching accuracy (mean = 83%) after making the first copy of an untrained behavior on command. This is the first evidence of contextual imitation of intransitive (body-oriented) movements in the beluga and adds to the reported findings on production imitation of sounds in this species and production imitation of sounds and motor actions in several cetaceans, especially dolphins and killer whales. Collectively these findings highlight the notion that cetaceans have a natural propensity at skillfully and proficiently matching the sounds and body movements demonstrated by conspecifics, a fitness-enhancing propensity in the context of Cooperative Hunting and anti-predatory defense tactics, and of alliance formation strategies that have been documented in these species' natural habitats. Future work should determine if the beluga can also imitate novel motor actions.
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Contextual imitation of intransitive body actions in a Beluga whale (Delphinapterus leucas): A “do as other does” study
2017Co-Authors: Jose Z Abramson, Joseantonio Esteban, Fernando Colmenares, Francisco Aboitiz, Mª Victoria Hernández-lloreda, Josep CallAbstract:Cetaceans are remarkable for exhibiting group-specific behavioral traditions or cultures in several behavioral domains (e.g., calls, behavioral tactics), and the question of whether they can be acquired socially, for example through imitative processes, remains open. Here we used a “Do as other does” paradigm to experimentally study the ability of a beluga to imitate familiar intransitive (body-oriented) actions demonstrated by a conspecific. The participant was first trained to copy three familiar behaviors on command (training phase) and then was tested for her ability to generalize the learned “Do as the other does” command to a different set of three familiar behaviors (testing phase). We found that the beluga (1) was capable of learning the copy command signal “Do what-the-other-does”; (2) exhibited high matching accuracy for trained behaviors (mean = 84% of correct performance) after making the first successful copy on command; (3) copied successfully the new set of three familiar generalization behaviors that were untrained to the copy command (range of first copy = 12 to 35 trials); and (4) deployed a high level of matching accuracy (mean = 83%) after making the first copy of an untrained behavior on command. This is the first evidence of contextual imitation of intransitive (body-oriented) movements in the beluga and adds to the reported findings on production imitation of sounds in this species and production imitation of sounds and motor actions in several cetaceans, especially dolphins and killer whales. Collectively these findings highlight the notion that cetaceans have a natural propensity at skillfully and proficiently matching the sounds and body movements demonstrated by conspecifics, a fitness-enhancing propensity in the context of Cooperative Hunting and anti-predatory defense tactics, and of alliance formation strategies that have been documented in these species’ natural habitats. Future work should determine if the beluga can also imitate novel motor actions.
Robert L Pitman - One of the best experts on this subject based on the ideXlab platform.
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Cooperative Hunting behavior prey selectivity and prey handling by pack ice killer whales orcinus orca type b in antarctic peninsula waters
Marine Mammal Science, 2012Co-Authors: Robert L Pitman, John W DurbanAbstract:Currently, there are three recognized ecotypes (or species) of killer whales (Orcinus orca) in Antarctic waters, including type B, a putative prey specialist on seals, which we refer to as “pack ice killer whale” (PI killer whale). During January 2009, we spent a total of 75.4 h observing three different groups of PI killer whales Hunting off the western Antarctic Peninsula. Observed prey taken included 16 seals and 1 Antarctic minke whale (Balaenoptera bonaerensis). Weddell seals (Leptonychotes weddellii) were taken almost exclusively (14/15 identified seal kills), despite the fact thattheyrepresentedonly15%of365sealsidentifiedonicefloes;thewhalesentirely avoided taking crabeater seals (Lobodon carcinophaga; 82% relative abundance) and leopard seals (Hydrurga leptonyx; 3%). Of the seals killed, the whales took 12/14 (86%) off ice floes using a Cooperative wave-washing behavior; they produced 120 waves during 22 separate attacks and successfully took 12/16 (75%) of the Weddell seals attacked. The mean number of waves produced per successful attack was 4.1 (range 1–10) and the mean attack duration was 30.4 min (range 15–62). Seal remains that we examined from one of the kills provided evidence of meticulous postmortem prey processing perhaps best termed “butchering.”